Tigercat T726G TRENCHER OPERATOR'S MANUAL SN 726T0501–726T0600 - PDF DOWNLOAD

T726G TRENCHER

OPERATOR'S MANUAL

SERIAL NUMBER 726T0501 – 726T0600

ISSUE 3.0, APRIL 2020 Tigercat Industries Inc. P.O. Box 637 Brantford, Ontario Canada N3T 5P9 Tel: (519) 753-2000 Fax: (519) 753-8272

ii

Tigercat T726G Trencher TABLE OF CONTENTS INTRODUCTION................................................................................................................................................. v MACHINE IDENTIFICATION AND SERIAL NUMBERS..................................................................................... vi STANDARDS FOR MACHINE OPERATOR PROTECTIVE STRUCTURES.....................................................vii NON-APPROVED FIELD PRODUCT CHANGES.............................................................................................viii WARRANTY – EPA.............................................................................................................................................. ix SAFETY...............................................................................................................................................................1 CONTROLS AND OPERATION...........................................................................................................................2 LUBRICATION AND MAINTENANCE.................................................................................................................3

CALIFORNIA Proposition 65 Warning Diesel engine exhaust and some of its constituents are known to the State of California to cause cancer, birth defects and other reproductive harm.

T726G AVAILABLE LITERATURE Operator's Manual (this manual).....................................................................................................Part No. 45909AENG Service Manual................................................................................................................................Part No. 45910AENG Parts Catalogue...............................................................................................................................Part No. 45908A Vehicle Moving and Transporting Instructions.................................................................................Part No. 46336AMUL Engine Operation and Maintenance manual C87 T2......................................................................Part No. 47512AMUL Engine Operation and Maintenance manual C87 T4f.....................................................................Part No. 44554AMUL iii

iv

INTRODUCTION................................................................................................................................................. v

Tigercat T726G Trencher INTRODUCTION An Operator's manual, Service manual and a Parts catalog are made available by Tigercat to assist the dealer, customer and operator in becoming familiar with the features of the T726G Trencher.

SERIAL NUMBERS: T726G

726T0501 – 726T0600

The T726G Trencher is designed to cut ground surfaces too hard to cut with bucket-type excavators in preparation for digging trenches for laying pipeline, cable or drainage.

The Operator's manual will assist the operator with the techniques of proper and safe operation of the T726G Trencher. There is also important information regarding the safe operation of the attachment. The Service manual contains safety and servicing procedures and a preventive maintenance schedule to assist in repair and to ensure optimum machine performance.

Section 1 in both the Operator's manual and the Service manual contains safety information that must be followed. As well, throughout the rest of the manuals, DANGER, WARNING and CAUTION notices are displayed where necessary, drawing attention to possible hazards when performing certain procedures.

Only trained personnel are allowed to operate or work on the machine.

The information contained in this manual is current at time of printing. Improvements to the machine are on-going and may not be covered, therefore in these cases contact your Tigercat dealer for the appropriate information.

Tigercat reserves the right to make changes to the machine after this manual release date that may not immediately appear in this manual.

If the machine in question was built after the release date of this manual and there is a discrepancy, call Tigercat service department.

Tigercat reserves the right to change information contained herein at any time without prior notice.

Tigercat Industries Inc.

v

MACHINE IDENTIFICATION AND SERIAL NUMBERS..................................................................................... vi

Introduction

Tigercat T726G Trencher

MACHINE IDENTIFICATION AND SERIAL NUMBERS Please record all serial numbers related to this machine below and have ready before calling for assistance.

B

A

800195

A Engine Serial Number Plate Location B Engine Identification Label Location

700542

Machine Serial Number Plate Location– Cab

The engine serial number is stamped on the block above the oil pan. The engine identification label is located on the side of the oil pan.

The machine serial number plate is located inside the cab in the front left corner below the window.

Engine Serial Number:___________________________

Engine Date of Manufacture:_______________________ 724G-092

724G-113

Machine Serial Number Stamp Location –Front and Rear Chassis

The machine serial number is also stamped on the top left side of the front chassis near the centre joint and at the front of the rear chassis on the left side.

Machine Model Number:__________________________ Machine Serial Number:__________________________ Model Year:____________________________________ vi

STANDARDS FOR MACHINE OPERATOR PROTECTIVE STRUCTURES.....................................................vii

Tigercat T726G Trencher

Introduction

STANDARDS FOR MACHINE OPERATOR PROTECTIVE STRUCTURES THIS OPERATOR ENCLOSURE MEETS THE FOLLOWING STANDARDS: • SAE J1040 ROLL OVER PROTECTION STRUCTURES (ROPS) • SAE J231 FALLING OBJECTS PROTECTION STRUCTURES (FOPS) • SAE J1084 OPERATOR PROTECTION STRUCTURES (OPS)

MODIFICATIONS AND REPAIRS The integrity of the structure, and its continued ability to provide the level of protection it was designed for, could be seriously affected by any modifications to the structure, its mounting, or to the chassis to which it is attached.

Tigercat emphasizes the certification of approval of the structure will become void if any such modifications take place.

Tigercat may officially grant approval for modifications only by: • Written approval of repairs or modifications signed by the Tigercat Engineering Manager, or • Approved modifications officially released by Tigercat.

Approval will be granted, provided the work is carried out in the factory approved manner.

Unauthorized modifications and/or repairs made or contributed to by a customer or a Tigercat distributor may result in creating a dangerous situation and therefore the customer or Tigercat distributor will be considered to have assumed the risk involved or be negligent in creating this situation.

Tigercat will not be held responsible for situations arising from having created unauthorized modifications/changes to the structure.

Operator cabs are designed to industry standards so they will withstand force and absorb energy during a roll over (ROPS), when resisting the impact of a falling object (FOPS) and minimize the possibility of operator injury from penetrating objects (OPS). When a permanent deflection of the structure occurs, the structure can no longer provide the original designed level of protection and should be replaced. Attempts to straighten the structure, particularly by the application of heat, can reduce still further the structures remaining capability to protect.

The mounting and the frame or chassis to which the cab is attached is considered an integral part of the ROPS, FOPS, OPS and is included in the design, test and certification of the product.

Contact the Tigercat Service department before attempting any modifications or repair to tip-over protective structures.

Tigercat Industries Inc.

vii

NON-APPROVED FIELD PRODUCT CHANGES.............................................................................................viii

Introduction

Tigercat T726G Trencher

NON-APPROVED FIELD PRODUCT CHANGES The installation of any unauthorized attachment or changes made of any kind to this Tigercat product could affect the product's ability to perform as originally intended. The product's integrity, stability and its ability to perform safely could be at serious risk.

IT IS Tigercat POLICY THAT NO CHANGES ARE TO BE MADE TO ITS PRODUCTS INCLUDING DELETIONS OR ADDITIONS OTHER THAN A Tigercat APPROVED OPTION FITTED IN THE FACTORY APPROVED MANNER. Official approval to make changes or install options is only to be undertaken as follows: • The relevant options for that product must be shown or listed on current Tigercat documentation or literature such as a printed specification sheet, price list, parts manual, or product literature issued by Tigercat.

• Approved options or product changes authorized in writing by the Tigercat Engineering Manager.

Authorization by any other person is unacceptable.

Unauthorized changes made or contributed to by a person or organization may result in creating a dangerous situation and therefore the person or organization will be considered to have assumed the risk involved or be negligent in having created this situation.

Weight is an important factor when considering the addition of options or an attachment, Refer to your Tigercat distributor for information on maximum permissible operating weight and the effect the addition of various options may have on your machine.

Tigercat will not be held responsible for any situation that may arise resulting from Non-approved Field Product Changes to its product.

Should Tigercat become involved in a dispute resulting from changes made to the product without proper authorization by Tigercat as stated above, Tigercat will take whatever action is appropriate to protect its interests.

The product warranty policy and the certification on any safety items installed on the modified product will become NULL and VOID if the above policy is not adhered to as specified.

Non-approved product changes also nullify warranties given to Tigercat by its component manufacturers.

Tigercat Industries Inc.

viii

WARRANTY – EPA.............................................................................................................................................. ix

Tigercat T726G Trencher

Introduction

US Environmental Protection Agency (EPA) Warranty Certificate Tigercat Industries Inc. (Tigercat) warrants to the ultimate purchaser and each subsequent purchaser that the engine is designed, built and equipped so as to conform with US Environmental Protection Agency (EPA) regulations applicable at the time of manufacture and that it is free from defects in workmanship or material which would cause it not to meet these regulations for a period of:

• 2 years or 1,500 hours of operation, whichever occurs first, for engines less than 19 kW (25 Hp) • 5 years or 3,000 hours of operation, whichever occurs first, for engines greater than or equal to 19 kW (25 Hp) NOTE: This warranty applies to all units operated in the United States or Canada.

Coverage The model year, class of diesel engine, and emission application determination for your engine are identified on the Emission Control Information Label. This label is affixed to one of the following areas of the engine: the top of engine’s rocker arm cover, the right-hand side of the oil pan, and the right-hand side of the engine front gear cover.

The warranty period begins on the date the new equipment is sold to the first retail purchaser. The presence of the emission control label is the indication that the engine conforms to the applicable standards. Any emission control system parts which are proven defective during normal use will be repaired or replaced during the warranty period.

The engine owner has responsibility to perform all the required maintenance listed in the Operation and Maintenance Manual. Tigercat will not deny an emission warranty claim solely because no record of maintenance exists; however, a claim may be denied if failure to perform maintenance resulted in the failure of a warranted part.

It is recommended that replacement parts used for maintenance or repairs be Tigercat Service Parts to maintain the quality originally designed into your emission certified engine. The use of non- Tigercat parts does not invalidate the warranty on other components unless the use of such parts causes damage to warranted parts.

The manufacturer is liable for damages to other engine components caused by the failure of any warranted emission control system part. Tigercat is not responsible for failures resulting from improper repair or the use of parts that are not genuine Tigercat or Tigercat approved parts.

Component coverage New engines certified for sale and registered will have the following items covered by the emission warranty, depending on the emission level of the engine, if the items were first installed on the new engine as original equipment: Fuel injection system

• Fuel injection pump • Fuel injectors • Fuel injection lines Air induction system

• Intake manifold • Turbocharger system (includes exhaust manifold) • Charge air cooler Positive Crankcase Ventilation (PCV) system (if applicable)

• PCV valve • Oil fill cap

ix

Introduction

Tigercat T726G Trencher

Exhaust after treatment Devices (if applicable)

• Diesel Oxidation Catalyst (DOC) • Diesel Particulate Filter (DPF) • Selective Catalytic Reduction (SCR) • Diesel Exhaust Fluid (DEF) tank and dispensing systems Exhaust Gas Recirculation Systems (EGR)

• EGR valve assembly • EGR cooler Cold Start Enrichment Systems Electronic Control Units, Sensors, Solenoids, and Wiring harnesses used in above systems

Emissions warranty does not cover • Repairs arising from storage deterioration, failure to maintain the equipment, negligence, alteration, improper use of the equipment, collision or other accident, vandalism, or other casualty, or operation beyond rated capacity or specification.

• Repairs arising from abuse or neglect, including but not limited to: operation without adequate coolant or lubricants, adjustments to the fuel system outside equipment specifications, over-speeding, improper storage, starting, warm-up, or shutdown practices, incorrect fuel or contaminated fuel, oil or other fluids.

• Normal maintenance services, such as engine tune-ups, engine fuel system cleaning, checks, adjustments, shimming, etc.

• Items replaced due to customer demand.

• Labor charges performed by anyone except a dealer authorized by contract to repair the equipment, unless they qualify under special provisions (i.e. outside labor).

• Any and all travel costs for items such as towing, service calls, or transporting a unit to and from the place where the warranty service is performed. Unless otherwise specified on the standard engine warranty certificate.

• Normal maintenance costs, including but not limited to: lubricants, coolants, fluids, fuel, filters, and associated labor.

• Claims involving the inspection or reconditioning of units after storage or prior use.

• Repairs arising from service performed by agents not approved by Tigercat.

• Repairs arising from any unauthorized modification to the product or the use of non-Tigercat parts, implements or attachments.

• Removal, replacement, or installation of non-Tigercat optional equipment, attachments or components.

• Premiums charged for overtime labor costs or out of shop expenses.

• Economic loss including lost profits, crop loss, equipment rental, or other expense.

• Unauthorized modification or updating machines without a warrantable failure.

• Any and all costs of dealer shop supplies incurred with repairs, including but not limited to: solvents, cleaners, antiseize lubricants, loctite, sealant, adhesive, oil-dry, shop towels, etc.

• Failure of the machine, its implements or attachments caused by improper field application or loading.

• Any and all costs for coolant, fuel, or lube (oil) analysis including supplies and lab recommendations.

• Cost associated with cleaning of machine in preparation for servicing.

5363-5378-E 0420

x

SAFETY...............................................................................................................................................................1

Tigercat T726G Trencher SECTION 1 – SAFETY Read and understand the entire contents of this manual, and all manuals for any attachments or accessories associated with this machine, prior to operating or servicing this equipment.

CONTENTS – SECTION 1

ISSUE 3.0, APRIL 2020

A

ARTICULATION LOCK BAR..................................................................................................................................... 1.17 AVOID INJURY FROM BACKOVER ACCIDENTS................................................................................................... 1.9

B

BATTERY DISCONNECT SWITCH......................................................................................................................... 1.14 BATTERY SAFETY...................................................................................................................................................... 1.8 BOOM CYLINDER LOCK......................................................................................................................................... 1.18

C

CAB EXITS................................................................................................................................................................. 1.11 INTERLOCK DOOR SWITCH – LEFT AND RIGHT.............................................................................................. 1.11 COOLING SYSTEM.................................................................................................................................................. 1.16

D

DIESEL EXHAUST FLUID (DEF)............................................................................................................................. 1.10

E

EXHAUST FUMES.................................................................................................................................................... 1.16

F

FIRE PREVENTION DRY CHEMICAL CLEANUP PROCEDURES...................................................................................................... 1.29 FIRE PREVENTION GUIDELINES....................................................................................................................... 1.26 WHAT TO DO AFTER A MACHINE FIRE HAS OCCURRED.............................................................................. 1.29 WHAT TO DO TO PREPARE FOR A MACHINE FIRE........................................................................................ 1.27 WHAT TO DO WHEN A MACHINE FIRE OCCURS............................................................................................. 1.28 FLUID INJECTION INJURY...................................................................................................................................... 1.21

G

GENERAL SAFETY PRECAUTIONS........................................................................................................................ 1.4 GREASE INJECTION INJURY................................................................................................................................. 1.22

I

INTERLOCK DOOR SWITCHES............................................................................................................................. 1.11

L

LIGHTNING SAFETY AWARENESS....................................................................................................................... 1.23 LIGHTNING SAFETY............................................................................................................................................. 1.23 WHAT IS A LIGHTNING STRIKE?........................................................................................................................ 1.23

M

MACHINE STABILITY AND TRACTION.................................................................................................................. 1.12

N

NOTICE LABELS....................................................................................................................................................... 1.39

O

OPERATING SAFETY PRECAUTIONS.................................................................................................................. 1.10 TRENCHING........................................................................................................................................................... 1.13

P

PARKING THE MACHINE......................................................................................................................................... 1.14 PILOT SYSTEM PRESSURE, RELEASE................................................................................................................ 1.20 PREPARING THE MACHINE FOR MAINTENANCE.............................................................................................. 1.14 PROTECTIVE CLOTHING.......................................................................................................................................... 1.4

R

Safety

Tigercat T726G Trencher

RELEASE PILOT SYSTEM PRESSURE................................................................................................................. 1.20 S

SAFETY HAZARDS OPERATING............................................................................................................................................................. 1.8 VITON SEALS.......................................................................................................................................................... 1.7 SAFETY LABELS...................................................................................................................................................... 1.30 SAFETY PRECAUTIONS GENERAL................................................................................................................................................................. 1.4 OPERATING........................................................................................................................................................... 1.10 SERVICING............................................................................................................................................................ 1.19 SAFETY SIGNAL WORDS.......................................................................................................................................... 1.3 SAFETY SYMBOLS..................................................................................................................................................... 1.3 SERVICING SAFETY PRECAUTIONS.................................................................................................................... 1.15

T

TRANSPORTING THE MACHINE........................................................................................................................... 1.14 TRENCHING OPERATION SAFETY....................................................................................................................... 1.13

W

WELDING, PRIOR TO..................................................................................................................................... 1.15, 1.19 WORKING WITH OIL.................................................................................................................................................. 1.7

1.2

Tigercat T726G Trencher

Safety

SAFETY SYMBOLS

This safety alert symbol means ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED! The safety alert symbol identifies important safety messages on machines, safety signs, in manuals, or elsewhere. When you see this symbol, be alert to the possibility of personal injury or death. Follow the instructions in the safety message.

UNDERSTANDING SIGNAL WORDS DANGER DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.

WARNING WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.

NOTICE NOTICE indicates a potentially damaging situation which, if not avoided, may result in property damage.

1.3

Safety

Tigercat T726G Trencher

GENERAL SAFETY PRECAUTIONS

WARNING

WARNING 24 VOLT ELECTRICAL SYSTEM Safety is a prime responsibility of all.

To minimize the risks and promote safety at all times, this section of the operator’s manual details a number of safety rules which must always be followed and obeyed.

Wear a suitable hearing protective device such as earmuffs or earplugs to protect against noise.

Prolonged exposure to loud noise can cause impairment or loss of hearing.

These safety rules highlight both general and specific measures the operator must be familiar with and adhere to. More specific measures are illustrated with pictograms which may also be attached to the machine in locations pertinent to their respective message.

Keep safety labels in good condition. Repair or replace damaged labels.

KEEP BACK

• When approaching an operating machine on foot, stay well clear of the machine until the operator recognizes your presence. Make sure that all equipment has been shut down before advancing to the machine.

• Always read the operator's manual before operating the machine. Pay close attention to WARNING and HAZARD identifications.

• Follow all instructions from safety inspector and supervisors.

• You must be fully trained to operate this piece of equipment. Know the capabilities and the limitations of the equipment. Learn the most efficient operating techniques. Do not let untrained persons operate the machine.

• Use recommended protective clothing and safety devices such as gloves, safety boots, safety hat, goggles, and ear protection when necessary.

1.4

Tigercat T726G Trencher

Safety

• When mounting or dismounting the machine always use the three point technique; Use one hand with two feet or two hands with one foot.

WARNING

DANGER ROTATING CUTTER

The safety of persons outside the cab is the responsibility of the machine operator.

Avoid mounting or dismounting the machine in areas with slippery surfaces. Dry, deice, clean up or cover slippery surfaces with an anti-slip material before mounting or dismounting the machine.

NOTE: Opening the cab left or right door will stop machine functions.

• Always use the handrails and steps provided when mounting and dismounting from the machine.

• Do not jump off the machine at any time.

WARNING

• Do not try to climb onto, or off of, a moving machine.

It is not recommended to walk on machine surfaces not designated as walking areas.

• Do not use the seat armrest or joystick as a handle when entering or leaving the cab.

Do not walk on angled steel or irregular shaped surfaces.

• Do not use the machine foot controls as steps.

Walking surfaces on the machine must be covered with anti-slip materials to provide a safe foot hold and prevent slipping.

Maintain these anti-slip surfaces on a regular basis. If the surface shows signs of wear, replace the anti-slip material immediately.

WARNING Do not walk on machine surfaces with steel cleated foot wear. Steel cleats on steel surfaces are slippery and do not provide a safe foot hold.

1.5

Safety

Tigercat T726G Trencher

• To reduce risk of fire, completely clean machine of debris daily, particularly around the engine exhaust components. Eliminate hydraulic oil leaks, excess grease, fuel and oil accumulation (including spillage) immediately. Always turn OFF the engine and remove the ignition key before cleaning the machine.

• Maintain a clean cab interior, clear away trash or debris.

• Wash machine completely at every major service.

• Inspect the machine daily for signs of damage or unusual wear, to structures.

• Check for fluid leaks, or faulty operation. Repair or replace malfunctioning parts and systems immediately.

• Check windows and door guards for damage.

• Check protective windows for cracks. A damaged window has reduced strength to stop flying objects.

All damaged windows must be replaced with original equipment.

• Check windows for scratching, crazing and cloudiness that could impair clear visibility all around the machine.

• Do not operate the machine with any defective or inoperable components.

• Check all fluid levels.

• Do not operate the machine with any of the exhaust system, safety covers, oil shields, or other devices removed.

• Keep a first aid kit in an easily accessible location on the vehicle at all times.

1.6

Tigercat T726G Trencher

Safety

WORKING WITH OIL

SAFETY HAZARDS – VITON SEALS

Direct contact with oil implies a risk of skin complaints (example: eczema). Always observe strict hygiene.

O-rings and other seals manufactured of Viton material (fluorine rubber) produce a highly corrosive acid (Hydrofluoric) when subjected to temperatures above 315°C (600°F).

Observe the following when working with oil: • Oils used in this machine may be hot enough to cause serious burns.

This contamination can have extreme consequences on human tissue since it is almost impossible to remove after contact.

• Avoid contact with oil, particularly heated oil.

• Wash off oil on the skin immediately with soap and water.

The following procedures are recommended when inspecting equipment subjected to high temperatures such as fire:

• Wear protective gloves. Clean hands before putting on gloves. Apply protective cream to the hands to make washing easier.

• Visually inspect any seals or gaskets which have suffered from heat damage. They will appear black and sticky. If these are found, DO NOT TOUCH!

• Don't put oily rags in your pockets.

• Determine the material composition of any seals or gaskets, If fluoroelastomer seals (Viton, Fluorel, or Tecmoflon) have been used, the affected area must be decontaminated before undertaking further work. Natural rubber and nitrile materials are not hazardous.

• Change oil soiled clothing as soon as possible.

• Always keep an extra overall handy, but not in the machine where it can become dirty.

• Attend to cuts and abrasions immediately. Clean them and apply first-aid.

• Disposable heavy duty gloves (neoprene) must be worn and the affected area decontaminated by washing thoroughly with limewater (Calcium Hydroxide solution).

• Avoid breathing in oil fumes.

• Wash hands and arms frequently, for example, at each meal break or as often as possible.

• Any cloths, residue and gloves must be safely discarded after use.

NOTE: Burning discarded items is not recommended except in an approved incineration process where the dangerous products are treated by alkaline scrubbing.

1.7

Safety

Tigercat T726G Trencher

SAFETY HAZARDS – OPERATING • Maintain a charged fire extinguisher on the vehicle at all times and know how to use it.

• Do not carry passengers either in the cab or anywhere else on the machine. The vehicle is provided and approved with seating for the operator only.

• Be aware, when performing service and maintenance tasks, surfaces and grab handles in and around the engine and cooling system may become very hot when the engine has been running.

Contact with hot surfaces may cause injury.

• Do not allow anyone who may be unfit, physically or mentally, or who may be under the influence of alcohol or drugs, to operate the machine.

• When moving the machine, there must be enough clearance is available on both sides and above the machine or any of its attachments. Extra clearance may be required particularly where the ground is uneven.

• Comply with instructions in this manual and also your company regulations for the operation of this machine.

• Read, understand and follow all general safety precautions specified in the ATTACHMENT MANUFACTURER'S DOCUMENTATION.

• Approach with extreme caution any area where overhanging electrical power lines are present.

Serious injury or death by electrocution can result if the machine or any of its attachments are not kept a safe distance from these lines.

WARNING Engine exhaust, some of its constituents, and certain vehicle components contain or emit chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

• Maintain a distance of 3 m (10 ft) between the machine including the boom or attachment, and any power line carrying up to 50,000 V. Add 1.5 m (5 ft) for each 150,000 V increment beyond 50,000 V. For example, if a power line carries 350,000 V, keep back at least 6 m (20 ft).

WARNING

• If State/Provincial, local or job site regulations require even greater safety distances than stated above, strictly adhere to these regulations for your own protection.

Battery posts, terminals and related accessories contain lead and lead compounds, chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

Wash hands after handling.

• If the machine must be transported, adequately secure it to the transporting vehicle. Refer to the VEHICLE MOVING AND TRANSPORTING INSTRUCTIONS booklet supplied with the machine.

Refer to the TABLE OF CONTENTS page in THIS MANUAL for the booklet part number if required.

• Stopping the engine immediately after it has been working under load can result in overheating and premature wear of the engine components.

Reduce engine speed to LOW IDLE and let run for approximately five minutes to allow gradual dissipation of heat and also to reduce turbo speed.

This will also prevent loss of coolant by after boil and possible hot spot damage to the engine.

1.8

Tigercat T726G Trencher

Safety AVOID INJURY FROM BACKOVER ACCIDENTS

CAUTION

Lead-acid batteries contain sulfuric acid which can severely damage eyes or skin on contact.

Always wear a safety face shield, rubber gloves and protective clothing to reduce risk of accidents.

• Before moving the machine, be sure all persons are clear of the area.

• Always be alert for bystanders moving into the work area. Use the horn to warn bystanders before moving the machine.

Lead-acid batteries produce flammable and explosive gases. Keep arcs, sparks, open flames and lighted tobacco a safe distance from the batteries.

• When using a signal person, keep the person in view at all times. Always be sure the signal person is clear before backing up.

• If acid is accidentally splashed into your eyes, flush immediately with clean water and get medical attention.

• To avoid backover accidents: • Always look around before you back up. Be sure everyone is clear.

• Do not attempt to charge a frozen battery. It can explode.

• Keep the machine motion alarm in working condition. The motion alarm must sound when the machine is moving forward or in reverse.

• Use a signal person when backing up if the view is obstructed. Always keep the signal person in view.

• Learn the meaning of all flags, signs and markings on the job site and who is responsible for signalling.

• Keep all windows, mirrors and lights in good condition.

• Before servicing the machine, remove the negative (−) battery terminal cable (to the starter motor) from the battery.

• Dust, heavy rain, fog, snow, etc., can reduce visibility. As visibility decreases, reduce speed and use proper lighting.

• When service is complete, connect the negative (−) battery terminal cable and turn ON the battery disconnect switch.

• Do not short out the battery terminals for any reason.

Serious burns or an explosion can result.

1.9

Safety

Tigercat T726G Trencher

OPERATING SAFETY PRECAUTIONS

WARNING Do not use a liquid starting aid to start an engine.

This machine is equipped with a computer controlled heating element in the engine intake system. Starting fluids will explode on contact with the heating element.

• Turn OFF the engine and remove the ignition key when refuelling. Do not refuel the machine while smoking or near an open flame or sparks.

• Before moving the machine to the work site, all doors, panels, and access covers must be installed properly and secured.

• Attach a grounding strap to an unpainted metal surface on the machine if the refuelling tank or nozzle is so equipped.

FOR TIER 4F MACHINES ONLY

A

700137

A Fuel Nozzle Holding Bracket

• Before climbing on the machine to refuel, secure the fuel nozzle in the nozzle holding bracket. Once safely on the machine remove the nozzle and proceed to refuel. When refuelling is complete place the nozzle back in the holding bracket before climbing off the machine.

41581AUNI R0

• Diesel Exhaust Fluid (DEF) may irritate eyes or skin.

Do not get in eyes. Do not get on skin.

First Aid treatment: DEF Contains Urea. If swallowed call a Poison Control Centre or doctor immediately. Do not induce vomiting. If in the eyes, rinse with water for 15 minutes. If on the skin, rinse well with water. If irritation persists seek medical treatment.

• Check that no other personnel have moved into a hazardous area before starting the machine.

• Sound the machine horn before starting the machine.

WARNING Use only DEF which meets ISO 22241 specifications. Do not fill the DEF tank with any other fluid.

DEF is injected into the exhaust gas stream during normal operation of the Selective Catalytic Reduction (SCR) aftertreatment system.

• The operator seat is equipped with lap and shoulder harness belts. Always use both of these restraint systems at all times when operating the machine.

Use of other fluids may cause component damage, or a fire risk which could result in death or serious injury.

• Start the engine according to the instructions in this manual. Refer to OPERATING MACHINE in SECTION 2.

1.10

Tigercat T726G Trencher

Safety

CAB EXITS

CAUTION

There are two ways to exit the cab in case of an emergency.

Safety interlock switches DO NOT lock out the steering function on machines equipped with a steering wheel.

Left door– This is the main point of entry and is the only door to be used under normal operating conditions to enter or leave the cab. This door is equipped with an interlock door switch. Refer to INTERLOCK DOOR SWITCH in THIS SECTION.

CAUTION Do not use the steering wheel, joysticks or seat armrests to assist entering or leaving the cab.

Right door– This door should be used for emergency exits only. Do not use this door to routinely enter or leave the cab. This door is also equipped with an interlock door switch. Always turn OFF the engine before using the right door exit.

A

IMPORTANT! The operator of the machine must be familiar with these emergency exits and how to use them.

All operators should practice using both cab exits to become familiar with escape procedures should they need to perform them in the dark, when the machine is in a rolled position, or other possible adverse conditions.

T726G-007

B

Both exits should be checked to make sure they are operational and will function in an emergency. The interlock door switch on the doors must not be tampered with or defeated.

IMPORTANT! Unlock both doors before operating the machine to allow opening from the outside in case of an emergency. Make sure the doors are operational. Open the doors twice; once using the exterior latch handle and once using the interior handle.

T726G-078

T726G-082

A Interlock Reset Switch B Interlock System OFF (Yellow) C Interlock System ON (Green)

For additional information, refer to EMERGENCY EXITS in SECTION 3.

INTERLOCK DOOR SWITCH

C

To operate the machine, close both doors and press and release the interlock reset switch. The interlock system icon on the computer display will change from yellow to green.

Once the interlock system has been activated, the safety of both the operator and all persons outside the cab becomes the responsibility of the operator.

NOTE: The engine can be started but the machine functions cannot be operated with the doors open.

WARNING A

The interlock door switches and the interlock reset switch are safety features and their function must not be defeated in any way.

B

T726G-002

A Actuator (On Door) B Interlock Door Switch (Left Door Shown)

The left and right doors are equipped with an interlock door switch to prevent the machine from being operated with the doors open (interlock system is turned OFF).

1.11

Safety

Tigercat T726G Trencher • When travelling, position the attachment and the boom to avoid visual impairment.

• If vision is limited by dust, smoke, fog, rain or snow, stop the machine until visibility is restored.

WARNING

CAUTION • When the engine is running, do not allow anyone in areas of the machine where they may be crushed by moving components.

Do not open the cab doors when the cab is on a slope. The doors and screens are heavy and could swing out with considerable force. Anyone in the path of the swing could be injured.

• Maintain a safe operating distance between the machine and other personnel. Never operate the boom or attachment over the heads of bystanders.

• Never travel near co-workers or other pieces of equipment with attachments running.

• Do not allow people or other pieces of equipment near the trenching operation.

• Do not turn on the attachment until the machine is at the trenching site.

Anyone opening the door and holding on to it could be pulled out of the cab and injured.

MACHINE STABILITY AND TRACTION When working on slopes, travel straight up or down the slope to reduce the risk of roll-over.

NEVER travel across a STEEP slope or side hill: • To avoid tip over, keep the attachment as low as possible to maintain a low center of gravity.

WARNING

• Do not overload the machine as this can create an unstable condition and cause a roll-over.

• Check for correct tire air pressure. If the pressure is too low it will result in swaying. If the pressure is too high it will result in bouncing. Refer to TIRE PRESSURES in SECTION 3.

• Use only prearranged and approved signalling practices.

• Do not open the cab doors to increase ventilation when operating the machine.

• Keep the cab doors closed when driving or steering the machine to prevent accidental entry of branches and debris into the cab.

• Keep the cab doors closed and always use the seat belt when driving or steering the machine to prevent being thrown from the cab.

• Secure loose items in the cab.

• Prior to commencing work, check all equipment controls to ensure the machine responds correctly.

• All safety screens and guards, must be installed and properly secured.

• Always rest the attachment on the ground when operation is stopped, regardless if the engine is running or turned OFF. • Operate the machine only from a seated position in the operator seat.

• Watch for ground hazards such as metal debris, wire fencing or rocks.

1.12

Tigercat T726G Trencher

Safety

TRENCHING OPERATION SAFETY • Debris from the ground and even teeth separating from the drum become potentially dangerous missiles when thrown from these machines.

• Inspect cutting teeth, drum and attachment.

• Replace all worn teeth.

1.13

Safety

Tigercat T726G Trencher

PARKING THE MACHINE

When the engine is turned off all DEF is pumped back to tank before the engine power system is turned off. This process takes approximately 90 seconds.

WARNING To prevent injury, park the machine as outlined below.

Park the machine in a cleared area at least 15 m (50 ft) away from other equipment. In the event of a fire, this distance will minimize the chance of the fire spreading to other equipment.

Before leaving the cab, lower the attachment onto the ground.

If you will be out of the cab for an extended period, turn OFF the machine.

1. Park the machine on level ground with the attachment resting firmly on the ground.

2. Apply the parking brake.

3. Turn OFF the engine.

4. Remove the ignition key.

NOTE: The aftertreatment system and its related components are applicable to Tier 4f machines only.

Refer to AFTERTREATMENT SYSTEM in SECTION 3 for more information.

TRANSPORTING THE MACHINE When travelling on public roads, use accessory lights (when installed) and other cautionary devices to provide operators of other vehicles warning of your approach.

Ensure your machine meets all regulatory requirements.

When transporting the machine watch that enough clearance is available on both sides and above the machine or any of its attachments to avoid contact with power or telephone lines, bridge structures, etc.

Before transporting the machine, all doors, panels and access covers must be installed properly and secured.

Improperly secured doors or panels pose a serious danger to pedestrians and other vehicles.

Refer to T726G TRENCHER VEHICLE MOVING AND TRANSPORTING INSTRUCTIONS (Part No. 46336AMUL).

PREPARING THE MACHINE FOR MAINTENANCE A

WARNING To prevent injury, prepare the machine as outlined below prior to performing any maintenance or servicing activities.

700087

A Battery Disconnect Switch

• Park the machine as outlined in PARKING THE MACHINE in THIS SECTION.

5. Turn OFF the battery disconnect switch if required by the servicing procedure or if the vehicle is to be parked for an extended period of time, such as overnight.

• Install the articulation lock bar. Refer to ARTICULATION LOCK BAR in THIS SECTION and SECTION 3.

NOTE: Tier 2 machines are equipped with an after-run relay which delays the power disconnect to the engine ECU for 90 seconds after the battery disconnect switch has been turned off. The Engine ECU is still powered during the 90 seconds.

NOTE: Tier 4f machines are equipped with an after-run/ accessory relay. The relay disconnects power to the engine and related fuses and relays for 90 seconds after the battery disconnect switch has been turned off. The engine ECU is still powered during the 90 seconds.

1.14

Tigercat T726G Trencher

Safety

SERVICING SAFETY PRECAUTIONS • Conduct maintenance inspections at least as frequently as recommended in SECTION 3.

• Before performing maintenance or repair work on any equipment, consult the instruction manual provided by the manufacturer and follow the recommended procedures.

• Clean and service the cooler package daily to maintain moderate engine temperatures.

• Read, understand and follow all operating safety precautions specified by the trenching attachment manufacturer.

WARNING

A

• Before servicing the machine, allow the engine cooling system, fuel system, exhaust system, hydraulic system and machine surfaces to cool down.

700087

• Use a thermometer to check surface and system temperatures to ensure it is safe to begin service work.

A Battery Disconnect Switch

• When servicing or repairing equipment, turn OFF the engine, turn OFF the battery disconnect switch and lock out the switch in accordance with local regulations.

• Do not begin service work until the surface or system temperature has cooled down to below 38°C (100°F).

WARNING

• Before servicing the machine, remove the negative (−) battery terminal cable (to the starter motor) from the battery.

Diesel fuel or hydraulic fluid under pressure can penetrate the skin and cause serious personal injury, blindness, or death. If any fluid is injected into the skin, it must be surgically removed within a few hours by a doctor familiar with treating this type of injury.

• When service is complete, connect the negative (−) battery terminal cable and turn ON the battery disconnect switch.

• Install a DO NOT START ENGINE sign on the operator cab door and in the engine compartment when making repairs to the machine.

• Never use your bare hand to check for fluid leaks.

1.15

Safety

Tigercat T726G Trencher • Do not change any pressure or relief settings unless Tigercat authorized instruction has been obtained.

• Use the proper tool for the job. Repair or replace worn or damaged tools, including lifting equipment, immediately.

• Fluid leaks, under pressure, may not be visible.

When searching for leaks, wear work gloves and use a wrench or piece of wood to move hydraulic hoses.

Do not grab hold of hydraulic hoses. Wear safety goggles for eye protection.

• If the engine is running inside a building, make sure sufficient ventilation is available to prevent a build-up of toxic exhaust fumes. Run the engine only when it is necessary for testing or adjustments.

• Work in a ventilated area. If it is necessary to run an engine in an enclosed area, use an exhaust pipe extension to allow toxic exhaust fumes to be routed outdoors.

• Pressure can be maintained in a hydraulic system long after the power source and pump have been shut down. Refer to RELEASE PILOT SYSTEM PRESSURE in THIS SECTION and SECTION 5 of the SERVICE MANUAL.

• If you don't have an exhaust pipe extension, either work outside, or open the shop doors.

• Lower the attachment to the ground, turn OFF the engine and relieve trapped pressure from pilot system and brake accumulators before performing work on components, or disconnecting any hoses.

For information on relieving pressure, refer to PARKING THE MACHINE in THIS SECTION. The accumulators will self drain within two minutes of turning OFF the engine.

• Dispose of fluids properly. Do not pour fluids into the ground, stream, pond or lake.

• Before draining any fluids, know the proper way to dispose of them.

• When performing required hydraulic checks and adjustments, install all attachment guards.

Refer to the ATTACHMENT MANUFACTURER'S DOCUMENTATION.

• Explosive release of fluids from pressurized cooling systems can cause serious burns.

• Turn OFF the engine. Only remove the coolant fill cap when it is cool enough to touch with bare hands.

Slowly loosen the fill cap to the first stop to relieve pressure before removing the fill cap completely.

1.16

Tigercat T726G Trencher

Safety WARNING Always allow the attachment to come to a complete stop before approaching attachment to make adjustments.

• Keep your hands, feet, head, and loose clothing away from power driven parts. Tie long hair behind your head. Remove rings and other jewelry to prevent electrical shorts and entanglement in moving parts.

• Always be aware of machine pinch points that could cause injury. Never place body parts within the range of motion of the working parts of the machine.

E

Failure to follow all of the above instructions could result in serious injury or death from crushing.

CAUTION Do not open cab doors or window screens when machine is on a slope. The doors and screens are heavy and could swing out with considerable force.

ARTICULATION LOCK BAR A

WARNING

B

A

700040

A B C D E

D

C 700438

Lock Bar in Locked Position

Front Chassis Rear Chassis Articulation Lock Bar Lynch Pin Retaining Pin

A

To prevent accidental articulation of the machine and injury when working in the center joint area, install the chassis articulation lock bar between the front and rear chassis and hold in place with the lynch pins provided.

Refer to ARTICULATION LOCK BAR in SECTION 3 for instructions.

Never stand under an object supported with hydraulics.

Always use safety stands or a locking device.

700439

A Lower Panels

CAUTION The lower access panels are NOT HINGED or permanently attached to the machine, but are held in place by the UPPER DOORS. Therefore they can fall during the process of removing them from the machine. Once the UPPER DOOR is opened the LOWER PANEL is not fully supported and it is not safe to apply any weight or pressure to the panel, as it may fall out of the remaining supports. Do not use these LOWER PANELS as hand grips, when servicing the machine.

If the engine is running inside a building, ensure that sufficient ventilation is available to prevent a buildup of toxic exhaust fumes. Run the engine only when it is necessary for testing or adjustments.

WARNING Do not work below or behind a machine that is parked on a grade.

1.17

Safety

Tigercat T726G Trencher

LIFT BOOM CYLINDER LOCK 1. Before performing work under the attachment or lift boom, firmly support the attachment on level ground, on solid stands or install the lift boom cylinder lock.

A

B

C

724E-073

A 'T' Handle B Lift Boom C Lift Boom Cylinder Gland

5. Install the 'T' handle retaining bolt through the center hole in the lift boom cylinder lock.

Do not stand under the boom or the attachment while installing the lift boom cylinder lock.

Do not damage the cylinder piston rod when installing the lift boom cylinder lock.

A

T726G-007

A

700222

A

Cylinder Lock (Storage Location)

The lift boom cylinder lock is stored on the inside of the rear service compartment door.

WARNING

A Interlock Reset Switch

6. Turn the ignition key to the RUN position and press and release the interlock reset switch.

7. Slowly lower the boom until the lift boom cylinder lock is securely in place.

8. Turn OFF the engine.

To remove the lift boom cylinder lock:

Always install the lift boom lock before working on or around machine with the boom raised.

1. Start the engine.

Always install the 'T' handle retainer bolt.

3. Raise the boom enough to relieve the pressure on the lift boom cylinder lock.

Use only to support the boom and the attachment.

2. Completely raise the lift boom.

3. Turn OFF the engine.

4. Place the lift boom cylinder lock over one of the two cylinder rods with the open side facing down and wide end against the lift boom cylinder gland.

2. Press and release the interlock reset switch.

4. Turn OFF the engine.

5. Remove the 'T' handle retainer bolt, remove the lift boom cylinder lock and store it on the machine.

Do not stand under the boom or the attachment while removing the lift boom cylinder lock.

1.18

Tigercat T726G Trencher

Safety

PRIOR TO WELDING Prior to welding on any part of the machine, the repair area should be cleaned and a fire extinguisher placed nearby. Remove all paint from the area to be welded.

Heated paint gives off toxic fumes.

A

1. Place the welding machine ground clamp as close to the work area as possible.

Stray current can pass through bearings.

M726E-123

A

700087

A Battery Disconnect Switch B

2. Turn OFF the battery disconnect switch.

3. Disconnect the negative (−) battery terminal cable (to the starter motor) from the battery.

Due to the sensitive electronics on this machine, the following additional precautions must be taken:

700233

A XA2-A0 Expansion Module – Cab B XA2-A1 Expansion Module – Behind Cab, Right Side

A

5. Disconnect the multi-pin connectors from the expansion modules (behind the right side of the cab and inside the right cab door).

A

B 700117 724G-019

A Engine Electronic Control Unit (ECU) B Chassis Multi-Pin Connectors

4. Disconnect the engine electronic control unit (ECU) by unplugging the two chassis multi-pin connectors on the right side of the engine.

A Cover Fasteners – Two bolts on Bottom and One Screw on Top

6. Disconnect the computer in the cab by unplugging the two connectors from the back. Remove four control panel mounting bolts to gain access.

1.19

Safety

Tigercat T726G Trencher RELEASE PILOT SYSTEM PRESSURE Before working on or around the machine, turn OFF the engine and release the pilot system pressure by performing the following steps: 1. Close both doors.

2. Turn the ignition key switch to the RUN position. DO NOT turn ON the engine.

A

A

700088

A DEF Supply Module Multi-pin Connector

7. Disconnect the DEF supply module (rear pump compartment) by unplugging the multi-pin connector.

T726G-007

A Interlock Reset Switch

3. Press and release the interlock reset switch (instrument panel).

4. Repeatedly apply the brake foot pedal 50 times or more.

OR

A

Engage the front and rear differential lock switches and hold ON for 30 seconds. While waiting, repeatedly apply brake foot pedal at least 10 times.

Pressure may remain in the system after completing all of the above steps. Use caution when loosening hydraulic connections.

T726G-021

A MD3 Module Fuse – 3A

8. Remove the MD3 module fuse (number 8) located on the fuse and relay panel in the cab. Refer to FUSES AND RELAYS in SECTION 3.

For additional information, refer to RELEASE PILOT SYSTEM PRESSURE in SECTION 5 of the SERVICE MANUAL.

9. When welding is complete, connect the negative (−) battery terminal cable.

10. Turn ON the battery disconnect switch.

1.20

Tigercat T726G Trencher

FLUID INJECTION INJURY WARNING Diesel fuel or hydraulic fluid under pressure can penetrate the skin and could result in serious injury or death. If any fluid is injected under the skin, a medical doctor familiar with the treatment of this type of injury must surgically remove it within a few hours.

Hydraulic and diesel fuel systems on forestry machines operate at very high pressures, often 207 bar (3000 psi) and above. If a loose connection or a defect in a hose occurs, a fine, high velocity stream of fluid will result.

Even for systems pressurized to as little as 7 bar (100 psi), this fluid stream can penetrate human skin as if it were a hypodermic needle.

Safety IN THE EVENT OF ANY SUSPECTED FLUID INJECTION INJURY • REPORT THE INJURY TO YOUR SUPERVISOR IMMEDIATELY. • SEEK PROFESSIONAL MEDICAL ATTENTION IMMEDIATELY. As always the best defence against suffering the effects of fluid injection is to prevent the accident from occurring in the first place.

SEARCHING FOR POSSIBLE FLUID LEAKS: • DO NOT search for leaks with your bare hands.

ALWAYS wear thick protective gloves.

• ALWAYS wear safety goggles for eye protection.

• Keep all body parts well away from the area being investigated for leaks.

Initially, an accidental fluid injection beneath the skin may only produce a slight stinging sensation. There is a danger that you will tend to ignore this, thinking that it will get better with time. Most often, it does not! Within a very short time the wound may begin to throb painfully, indicating that tissue damage has already begun.

Similarly fluid injected directly into a blood vessel can spread rapidly through your circulatory system. The human body has little ability to purge injected fluid.

• Use the end of a long piece of wood to move hoses or other obstacles.

• Place the end of a long piece of wood in the suspected path of any fluid stream. DO NOT use any part of your body.

Time becomes critical as tissue damage progresses rapidly. The longer you delay getting professional medical attention, the more damage can occur.

Although fluid injection accidents are rare, the resulting injury has on occasion required the amputation of a finger, a hand or in some cases the entire limb. The longer the delay in getting professional medical aid, the further up the limb the tissue damage can spread. An injury of this type can become very serious or even fatal if not dealt with promptly and properly.

• Recognize that the source of the leak and the fluid streaming from it may be very small and not easily visible. You may only be able to see the fluid that accumulates as a result of the fluid stream.

WHEN PERFORMING ANY SERVICE WORK • Stop the engine and relieve all diesel fuel or hydraulic pressure before disconnecting any lines or otherwise working on the system.

• DO NOT grab any hydraulic or diesel fuel connectors or hoses when they are subjected to pressure.

• Always verify that hoses are rated for the pressures to which they will be subjected.

• DO NOT use any hoses that you suspect could be defective.

1.21

Safety

Tigercat T726G Trencher

GREASE INJECTION INJURY WHEN USING PNEUMATIC GREASE GUNS Pneumatic grease guns can deliver grease at pressures from 17 – 400 bar (246 – 5801 psi). It takes less than 7 bar (100 psi) to inject a substance through human skin.

ALWAYS get professional medical treatment immediately after any type of injection injury.

Provide the physician with information on the type of grease, the pressure setting of the gun, and similar details.

The amount of fluid injected, type of fluid (or material), pressure at which it was injected, and the elapsed time between injection and surgery all influence the chances of successful treatment for this type of serious injury.

Prior to using a high pressure pneumatic grease gun, perform the following: • All operators of high pressure pneumatic grease guns MUST be trained in the hazards of its operations and the treatment for such injuries.

• Do not operate a high pressure pneumatic grease gun unless you have been trained in the proper operation and are aware of all safety precautions of such a tool.

• Wear protective clothing such as gloves, safety hat and safety glasses.

• Inspect all parts of the grease gun for wear and tear and replace all worn or damaged parts.

• Install protective shrouds on all grease gun nozzles as safety devices.

• Remove dirt and grease from grease fittings prior to greasing.

• Replace any defective grease fittings on equipment with new fittings immediately.

• When badly positioned fittings are identified, replace them with angled or swivel fittings for easier access.

1.22

Tigercat T726G Trencher

Safety

LIGHTNING SAFETY AWARENESS

LIGHTNING SAFETY

WHAT IS A LIGHTNING STRIKE?

In spite of the popular myth that being struck by lightning is an unlikely event, the facts show that lightning strikes occur frequently. As a result loggers are at high risk because their work is outdoors and close to known strike points such as tall trees and heavy equipment.

Lightning is a discharge of the electricity produced by a thunderstorm. As the thunderstorm develops, many small particles of ice within the storm clouds bump together. These collisions create a positive charge at the top of a cloud and a negative charge at the bottom.

As this continues a second positive charge builds up on the ground beneath the cloud, concentrated around high objects such as hills, trees, buildings, equipment and even people.

Loggers can increase their chances of avoiding a lightning strike by following a few simple safety practices: • Designate a member of your crew to: • Monitor daily weather forecasts • Observe local weather conditions

When the difference between the electrical charge in the cloud and on the ground becomes great enough to overcome the resistance of the insulating air between them, an electrical current flows instantly. This is a lightning strike.

• Alert all other members of the crew when a possible lightning threat develops • Don’t start or continue any work that cannot be stopped immediately, when a storm moves nearby.

The electrical potential in a lightning strike can be as much as 100 million volts. Lightning strikes can occur over very large distances, even as much as 60 km (37 miles). Lightning travels both in front of and behind a thunderstorm and so strikes happen even when rain has not started or has stopped. Lightning can hit in the same place, many times and often spreads out over 18 m (60 feet) within the soil around the strike point.

• Anticipate a high-risk situation and take action early by moving to a low-risk location. Do not hesitate. If there is lightning, you are in danger.

Thunder always accompanies lightning. When lightning occurs, the air through which it travels is instantaneously heated to a temperature more than 28,000°C (50,000°F).

The air expands rapidly due to this heating, then quickly contracts as it cools. It is this contracting shock wave that we hear as thunder.

In many areas of the world, lightning strikes are second only to flooding as the greatest cause of storm related deaths and injuries. Although only 10% of lightning strike victims are killed, virtually all from cardiac or respiratory arrest, over 70% of those that survive suffer severe, life-long injury and disability. The symptoms of a lightning strike include memory loss, fatigue, chronic pain, dizziness, sleeping difficulty and the inability to complete several tasks at one time.

• Obey the rule - If you see lightning, Flee. If you hear thunder, Clear. Do not follow the now obsolete guideline to take shelter when the time between seeing lightning and hearing thunder is 30 seconds or less. This does not provide sufficient time to ensure safety.

• Remain in your safe location for 30 minutes after the last sight of lightning or the last sound of thunder.

The safest location during lightning activity is inside a fully enclosed, substantially constructed building, a house, office, school, shopping area, etc. These are the safest because of the electrical wiring and plumbing that they contain. Should lightning strike, the electrical current will travel through the wiring or plumbing into the ground. When such a building is nearby, always seek shelter there first.

Unfortunately loggers do not often work close to buildings and therefore other alternatives need to be considered.

Sheds, weather shelters, hunting blinds, tents and other partially open or small structures are not safe against lightning strikes as they lack the electrically grounded components of larger buildings. They are intended for sun or rain protection only. Do not seek shelter from lightning strikes inside these structures.

1.23

Safety The second safest location during lightning activity is inside a fully enclosed car, van, truck or bus with a metal roof and metal sides. The electrical energy of a lightning strike to these vehicles is carried to ground by the conducting outer metal surfaces. This is called the skin effect.

Tigercat T726G Trencher IF INSIDE A MOTOR VEHICLE OR FULLY ENCLOSED ROPS EQUIPMENT CAB: • Under no circumstances whatsoever step outside of the vehicle or off the equipment to move to another shelter. Very dangerous electrical pathways to ground may go through you.

Do not seek safety from lightning strikes in vehicles with fiberglass or plastic body shells or in convertible top vehicles. None of these are safe, as they do not offer skin effect lightning protection.

• Shut down all operation, turn off the engine, close all doors and raise all windows.

• Sit squarely in the seat with your hands in your lap and your feet flat on the floor mat.

Heavy forestry equipment such as a skidder, loader, feller buncher, forwarder, etc. with a fully enclosed Rollover Protective Structure (ROPS) cab take advantage of the skin effect and are therefore safe in electrical storms.

However machines with a rollover canopy only are not safe against lightning strikes as they are open to electrically conductive rainwater and do not benefit from the skin effect. Operators of this equipment must abandon their machines and get to a safer location before lightning strikes.

• Do not touch any metallic objects referenced to the outside of the vehicle. Do not touch any door and window handles, control levers, foot pedals, steering wheels, cab interior walls and any other inside to outside metal objects.

• Do not touch any radio or telephone connected to an outside antenna.

IF YOU ARE CAUGHT OUTSIDE AND HAVE NOWHERE TO GO: • Avoid wide-open areas where you project above the surrounding landscape.

Note that the rubber tires on motor vehicles and heavy equipment do not increase safety from lightning strikes.

Lightning has already travelled a great distance through the air to strike the vehicle. In comparison a few inches of rubber in a tire offers absolutely no additional insulation.

• Seek shelter in a low place, such as a ditch, ravine, valley, canyon or cave.

• Get away from open water such as ponds or streams.

• Do not take shelter under any isolated tall trees or small groups of trees.

WHAT TO DO IF YOU ARE OUTSIDE AND SEE LIGHTNING OR HEAR THUNDER

• Seek shelter amongst the dense, thick growth of the shortest trees.

IF YOU CAN, GET INSIDE: Run to the nearest building, motor vehicle or fully enclosed ROPS equipment cab immediately. Being anywhere outside is not safe.

• Avoid entering any small enclosures or shelters.

IF INSIDE A BUILDING:

• Keep clear of any materials that can conduct electricity such as wire fences and gates, metal pipes, poles, rails and tools.

• Do not seek shelter under any motor vehicle or heavy equipment.

• Don’t watch the lightning storm from open windows or doorways. Stay in inner rooms.

• Stay at least 15 m (50 ft) away from metal objects such as a fuel tank, a vehicle or machinery without a cab, motorcycle, ATV, etc.

• Stay well away from corded telephones, electrical appliances, lighting fixtures, radio microphones, electrical sockets and plumbing pipes and fixtures.

• Stay at least 5 m (16 ft) apart from any other members of a group so that lightning won’t travel between you.

• Do not use the telephone except for emergencies.

1.24

Tigercat T726G Trencher

Safety

WHAT TO DO IF YOU FEEL YOUR SKIN TINGLING, YOUR HAIR STANDS ON END, LIGHT METAL OBJECTS VIBRATE OR YOU HEAR A CRACKLING SOUND: • Lightning is probably about to strike. You only have a few seconds to act.

• Put your feet together. Crouch down like in a baseball catcher’s position. Hold your head down.

Cover your ears to protect them against the noise of the thunder.

• Do not lie flat on the ground. By touching as little of the ground as possible, the lightning may not move across the ground to you.

WHAT TO DO IF A CO-WORKER HAS BEEN STRUCK BY LIGHTNING: • The victim does not carry any electrical charge.

There is no danger to anyone helping this person.

You can touch him or her immediately.

• Call your local emergency response telephone number immediately.

• If the victim has no pulse, their heart has stopped or they have stopped breathing, call for professional medical help immediately and then begin administering appropriate first aid. Use a portable defibrillator if one is available (as required).

• Be careful about staying in the storm to take care of the victim. You can get hit by lightning too. If you can, move the victim to a building as soon as possible.

• To further increase your awareness about lightning safety, see the following web sites: • National Weather Service Lightning Safety http://www.lightningsafety.noaa.gov • National Lightning Safety Institute http://www.lightningsafety.com

1.25

Safety

Tigercat T726G Trencher

FIRE PREVENTION

• Clean out all accumulated forest debris (twigs, pine needles, branches, bark, leaves, sawdust, small wood chips) and any other combustible materials from inside the machine belly pans or lower machine structures as well as from areas in proximity to the engine, fuel and hydraulic oil systems no less frequently than at the completion of each work shift.

When working in a forest environment, it is impossible to prevent combustible debris from collecting in tight corners of the machine. This debris may cause a fire.

However, when mixed with fuel, oil or grease in a hot or confined place, the danger of fire is greatly increased.

Use the following fire prevention guidelines to supplement the operator’s fire prevention efforts. In no case are the guidelines to be used, or assumed, to be replacements for diligent operator efforts at preventing fires.

The following guidelines will help to keep your equipment up and running efficiently and keep the risk of fire to a minimum: • Maintain a CHARGED fire extinguisher on the machine at all times and KNOW HOW TO USE IT. • Remove debris and blow out dust regularly from the air intake doors, engine radiator and charge air cooler, hydraulic oil cooler, diesel fuel cooler and air conditioning condenser core to prevent overheating of the engine and hydraulics and to maintain efficient operation of the machine. Refer to CLEANING COOLER PACKAGE in SECTION 3.

• Inspect the machine regularly for any signs of diesel fuel or hydraulic system leakage. Check for worn or eroded fuel or hydraulic lines before starting up any equipment.

• Clean up any grease, diesel fuel, hydraulic and lubricating oil accumulation and spillage immediately.

• Steam clean the engine, hydraulic pumps, transmission, brake, fuel and hydraulic oil tank compartments and all machine belly pans at least once a month or more frequently when working in logging conditions where large amounts of combustible forest debris are present.

• Use only non-flammable solutions for cleaning the machine and components.

• Inspect the exhaust system daily for any signs of leakage. Check for worn, cracked, broken or damaged pipes or muffler. Also check for missing or damaged bolts or clamps. All exhaust leaks or defective parts must be repaired immediately.

Engine exhaust leaks can cause fires. Do not operate the machine until the exhaust leak is repaired.

• During daily operation of the machine, the occurrence of exhaust leaks are usually accompanied by a change or increase in engine exhaust noise levels. These audible warnings cannot be ignored. When exhaust leaks occur during operation, shut down the machine immediately and do not put it back to work until the necessary repairs have been completed.

• Blow off all forest debris and fine organic material accumulated near hot engine exhaust components (turbocharger and exhaust manifold as well as exhaust pipes and muffler) at the completion of each work shift or more frequently when working in logging conditions where large amounts of combustible forest debris are present. Visual inspection is vital after blow-off to ensure thorough cleanliness. Engine exhaust systems provide numerous small pockets where sawdust, small wood chips and other flammable forest debris can gather.

Even small accumulations close to hot exhaust components can ignite and smoulder. If dislodged this smouldering debris can fall into other areas of the machine and thereby spread a fire.

• Park the machine at least 15 m (50 ft) away from other equipment at the end of each shift.

• Do not leave the machine parked with boom, arch or blade suspended off the ground. If Supporting hydraulic hoses that burn through during a fire, will inject pressurized hydraulic oil into the fire causing the boom, arch or blade to fall rapidly to the ground.

• Turn OFF the battery disconnect switch at shut down to de-energize all electrical circuits.

1.26

Tigercat T726G Trencher

Safety WHAT TO DO TO PREPARE FOR A MACHINE FIRE

• Remain with the machine for at least 45 minutes at the end of operations while the machine cools.

• Remove all keys, lock equipment and fuel fill cap at the end of operations to reduce the risk of vandalism.

• Prevent the fire from happening in the first place by ensuring all machine systems are frequently inspected and always well maintained.

• Be cautious when smoking. Do not permit an open flame, a lighted cigarette, etc., to be around any vehicle, especially during fuelling operations or when the fuel system is open to the atmosphere or when servicing batteries.

• All hand held fire extinguishers must be charged and in working order. Fire extinguishers require routine care. Follow the manufacturer’s instructions for inspection and maintenance shown on the label of the fire extinguisher and in the FIRE EXTINGUISHER MANUFACTURER'S DOCUMENTATION. • Any pressurized water systems on the machine (if applicable) must be charged and in working order. Refer to PRESSURIZED WATER SYSTEM MAINTENANCE in SECTION 3.

• You must have the proper fire extinguishers on site.

Most fires involving mobile forestry equipment will be Class A or B. Dry chemical extinguishers must be rated ABC and pressurized water extinguishers must be rated A. Class A fires involve ordinary combustibles such as wood, cloth, paper, rubber and many plastics, Class B fires occur with flammable liquids such as diesel fuel, oil and grease and Class C fires apply to energized electrical equipment.

• Ensure the nozzle of any hand held extinguisher and pressurized water system available on the machine and at the work site fits within the fire extinguisher access holes in the doors of the machine.

• AFTER transporting (trucking) a machine from one job site to the next, open all doors and access panels and blow off any debris that may have repositioned itself onto the engine and exhaust parts due to wind turbulence caused by the journey.

• Before starting repair work, such as welding, clean the surrounding area and a have a fire extinguisher close by.

• Store rags and other combustible materials in a safe, fireproof location.

• The fire detection system* must be in working order.

Refer to FIRE DETECTION SYSTEM in SECTION 2.

• The fire suppression system** must be charged and in working order. Refer to FIRE SUPPRESSION SYSTEM (OPTIONAL) in SECTION 2.

• You must be familiar with the recommended procedures for fire contained in the emergency action plan of your company.

• Do not use the machine on top of or to push piles of burning timber. A machine fire will most probably result.

• You must follow all national, state/provincial and local regulations dealing with fire fighting in effect in your specific geographic region. Regulations will vary from region to region but most will usually require:

NOTICE Equipment fires adversely effect your ability to log, may increase your insurance premiums dramatically or prevent you from obtaining insurance coverage at all.

• Workers assigned to fire fighting duties must be physically capable of performing them safely and effectively.

• Workers designated to use fire fighting equipment as part of an emergency action plan must receive full and proper training from a qualified instructor.

1.27

Safety

Tigercat T726G Trencher

• When portable fire extinguishers are provided for use in the workplace, training must be provided to familiarize workers with the general principles of fire extinguisher use and the hazards involved with fire fighting.

6. If possible use a dry chemical fire extinguisher or fire suppression system** first to fight a machine fire.

Then immediately afterwards use the pressurized water hose supplied with the machine (if applicable) or a pressurized water extinguisher (if available).

A fire suppressed by dry chemical may re-ignite from the heat retained by any debris or hot machine components in the area. The water will cool the area, reducing the chances of re-ignition.

• Training must be provided upon initial employment and at least annually thereafter.

• After you have received the training as outlined above, you must know how to use the fire extinguisher, the pressurized water system (if applicable) and the fire suppression system** on your machine. There is not enough time available to read instructions during a fire emergency.

• Use the PASS method. This is the most effective use of a fire extinguisher.

• Pull the pin at the top of the extinguisher that keeps the handle from being pressed. Break the plastic seal as the pin is pulled.

• All information necessary for you to immediately contact all sources of help (local fire department, etc) in the event of a fire emergency must be recorded and readily available at all times.

• Aim the nozzle at the base of the fire. Do not aim the nozzle at the flames. In order to put out the fire, you must extinguish the fuel, not the flames. Hose nozzles are often clipped to the extinguisher body. Release the hose before taking aim.

WHAT TO DO WHEN A MACHINE FIRE OCCURS

• Squeeze the handle to release the pressurized extinguishing agent. The handle can be released at any time to stop the discharge.

If operating the machine when a fire occurs: 1. Lower all working attachments to the ground.

2. Turn OFF the engine.

• Sweep from side to side at the base of the fire until the fire is completely out or the fire extinguisher is empty.

3. Activate the fire suppression system**.

4. Radio or call for help. Be certain to report a fire immediately.

5. Exit the machine taking fire extinguisher and pressurized water system hose (if applicable) with you.

6. At all times ensure your own personal safety and the safety of anyone that may be in the area. Approach any fire with extreme caution. All fires can be very dangerous and life threatening.

7. Only if you can safely do so, turn OFF the battery disconnect switch.

Before deciding to fight the fire, be certain that: 1. The fire is small and not rapidly spreading.

2. There is always a clear, safe escape route to your back.

700068

3. You have received training in the use of the available fire extinguishing systems and are confident you can operate them effectively.

4. If in any doubt about whether or not to fight the fire – DON’T. Instead stand well clear of the fire and wait for help to arrive.

Typical Fire Extinguisher Access Hole

• Place the nozzle of the fire extinguisher into the appropriate fire extinguisher access hole and discharge the extinguisher.

• Only if you can safely do so, open the access panels to the machine in the area of the fire.

• Failing all attempts to access the machine compartment, discharge the extinguisher through the mesh or any available openings on the machine.

5. Be aware, hoses containing engine coolant, diesel fuel or hydraulic hoses could fail during a fire. If this happens, hot coolant, fuel or oil could possibly be ignited by the fire.

1.28

Tigercat T726G Trencher

Safety

• Ensure the machine and all components have cooled down sufficiently after a fire to prevent re-ignition from occurring.

• Remain with the machine until help arrives.

WHAT TO DO AFTER A MACHINE FIRE HAS OCCURRED Before returning the machine to work: 1. Ensure the cause of the fire is determined and all appropriate repairs are completed.

• In areas of the machine that remained cool and dry during the fire, the dry chemical will stay in powder form. Be certain to clean these areas immediately to prevent any settled residual powder from coming into contact with moisture whether through direct contact or humidity in the air. Remove the powder residue by blowing off with air, sweeping, dusting or vacuuming using a HEPA filter capable of trapping the small dry chemical particles. Then wipe all surfaces with a damp cloth.

• In areas exposed to moisture, the dry chemical powder will combine with water to form a mildly acidic paste.

2. Ensure the fire detection system* or the fire suppression system** is properly serviced and in working order (if applicable).

NOTE: All surfaces covered by this dry chemical paste including electrical contacts are vulnerable to corrosive attack.

3. Replace or recharge all extinguishers used in fighting the fire.

To neutralize the acidic paste on large surfaces, spray or wash these areas with a mixture of three parts hot water to one part baking soda. Allow this mixture to stand for several minutes before rinsing with warm water. Wash the area with a mild soap and water solution. Rinse thoroughly with water.

Blow-dry to remove all residual water. Cleaning electrical contacts with an electrical contact cleaner that has no flash or fire point and is non-corrosive and non-conductive such as CRC Contact Cleaner 2000.

• Notify your equipment dealer and/or Tigercat Industries Inc. by completing an incident report, Tigercat form number 5101. *NOTE: Fire detection systems are offered by Tigercat as an optional installation on some Tigercat product lines. Please disregard any references made to fire detection systems if not installed on your machine. **NOTE: Dry chemical fire suppression systems are offered by Tigercat as an optional installation on some Tigercat product lines. Please disregard any references made to fire suppression systems if not installed on your machine.

DRY CHEMICAL CLEANUP PROCEDURES Both ABC dry chemical fire extinguishers and fire suppression systems discharge a chemical powder to extinguish the fire. The chemical makeup and the small particle size of the powder as well as the force of the discharge all contribute to the fire fighting capability.

These same characteristics also permit the powder to penetrate into and fully cover all components in the vicinity of the discharge.

The following are recommendations for the cleanup and neutralizing of areas exposed to dry chemical powder: NOTE: Workers performing this work must wear protective clothing, safety goggles and a fine particle dust mask to minimize their personal exposure to the dry chemical powder.

• All electrical systems must be completely deenergized prior to any cleanup.

1.29

• In areas exposed to heat during the fire, the dry chemical powder will melt forming a coating that cakes or crusts on all surfaces. To break down the caked dry chemical, spray or wash these areas with a 50/50 mixture of hot water and Isopropyl alcohol.

Allow this mixture to stand in place for several minutes. The caked dry chemical when exposed to moisture is also mildly acidic. Therefore when the break down procedure has been completed, follow this immediately with the neutralizing procedure as described in step 2.

Safety

SAFETY LABELS

Tigercat T726G Trencher USE SEAT BELT

All labels must be periodically cleaned and inspected to ensure legibility is maintained. Replace any label that becomes illegible, damaged or removed.

READ OPERATOR'S MANUAL

Always read the operator’s manual before operating the machine. Pay close attention to WARNINGS and HAZARD identifications.

This label notifies the operator the operator's seat is equipped with a lap and shoulder harness belt. Use this restraint system at all times when operating the machine.

Do not attempt to move or operate the machine until the lap and shoulder harness belt is fastened properly.

Study all the safety messages in this manual and on the labels on the machine carefully.

OPERATOR'S MANUAL LOCATION

This label indicates the storage location of the operator's manual.

1.30

Tigercat T726G Trencher NO RIDERS

Do not carry passengers either in the cab or anywhere else on the machine. The vehicle seating accommodation is for one operator only. Persons riding on the outside of the machine are subject to hazards such as falling off the machine, crush hazards, thrown object hazards and many other hazards which could result in death or serious injury.

Safety REMOVE IGNITION KEY BEFORE SERVICING THE MACHINE!

Prior to performing any service work or maintenance on the machine, turn OFF the engine, remove the ignition key and store it in a safe place.

If any person attempts to climb onto the machine during operation, stop the machine immediately. Do not operate the machine until other personnel are a safe distance away from the machine.

1.31

Safety EMERGENCY EXIT, CAB, RIGHT SIDE DOOR

Tigercat T726G Trencher EMERGENCY EXIT, HAND TIGHTEN ONLY This label indicates the escape hatch can also be used as an emergency exit.

The label also indicates the escape hatch knobs should be hand tightened only to allow for easy exit.

Ensure all exit locations are functioning properly.

Refer to EMERGENCY EXITS in SECTION 3.

This label alerts the operator that, in the event of an emergency, this door can be used as an emergency exit.

Ensure all exit doors and exit hatch are functioning properly at all times.

Refer to EMERGENCY EXITS in SECTION 3.

1.32

Tigercat T726G Trencher

Safety

KEEP BACK

This label warns personnel to keep back and stay clear of the machine during operation due to potential hazards.

When approaching an operating machine on foot, stay well clear of the machine until the operator recognizes your presence. Make sure that all equipment has been shut down before advancing to the machine.

ROTATING COMPONENT – KEEP BACK

This label warns of the rotating component hazard. All personnel must keep a safe distance from the trenching head when the trenching head rotor is rotating.

The safety of persons outside the cab is the responsibility of the machine operator.

Danger caused by flying debris. Improper operation of the trenching head and failure to follow safety precautions can result in personal injury.

1.33

Safety

Tigercat T726G Trencher

CRUSH HAZARD

CRUSH HAZARD

This label warns of the crush zone in the center joint area. This can occur when the machine steering is used.

Do not work in this area until the articulation lock bar is installed!

This label warns of the crush hazard caused by the boom when it is not properly supported.

Before working in the center joint area, install the articulation lock bar between the chassis and center joint to prevent accidental articulation which could result in death or serious injury.

Refer to ARTICULATION LOCK BAR INSTALLATION in SECTION 3 for complete instructions.

Never work under or near an unsupported boom or attachment. Contact with a falling boom could result in death or serious injury!

Always lower the boom to the ground so the weight of the boom and attachment is resting on the ground.

Properly support and brace boom and shut off engine before performing service work.

1.34

Tigercat T726G Trencher CUTTING HAZARD

Safety ENTANGLEMENT HAZARD

36779BUNI R0

This label informs you of the cutting hazards of the cooling fan blade when the engine is running.

This label warns of an entanglement hazard (rotating parts) zone.

Keep clear of cutting hazards caused by rotating components.

Do not place hands or fingers in this area! Rotating parts such as pulleys, belts and drives can cause entanglement of body parts resulting in serious injury.

Do not place hands or fingers in this area!

Rotating parts such as cooling fan blades can cause entanglement of body parts resulting in serious injury.

Keep hands and fingers clear of rotating fan blades!

Before performing any service work on these parts or in this area, turn OFF the engine and wait for rotating parts to come to a complete stop.

Keep hands and fingers clear of rotating belt, drive or pulley! Before performing any service work on these parts or in this area, turn OFF the engine and wait for rotating parts to come to a complete stop.

1.35

Safety

Tigercat T726G Trencher

EXPLOSIVE RELEASE OF HOT COOLING SYSTEM PRESSURIZED FLUID

EXPLOSION HAZARD

WARNING • EXPLOSION HAZARD. • DO NOT USE ETHER. • ENGINE EQUIPPED WITH HEATER STARTING AID. • USE OF ETHER COULD RESULT IN DEATH OR SERIOUS INJURY. 36782BENG R0

This label warns of an explosion hazard. The engine is equipped with a heater starting aid, do not use ether to assist in starting the engine.

Using ether could cause an explosion which could result in death or serious injury.

33952AUNI R0

This label warns of a pressure and fluid spray hazard when the coolant in the radiator is hot.

Do not loosen cap until cool. Explosive release of fluids from pressurized cooling system can cause serious burns.

Turn OFF the engine. Only remove coolant fill cap when cool enough to touch with bare hands. Slowly loosen cap to first stop to relieve pressure before removing completely.

1.36

Tigercat T726G Trencher FLUID SPRAY HAZARD

Safety STORED ENERGY HAZARD

WARNING

This label warns of a fluid spray hazard.

The machine is equipped with a pressurized water system. A water tank is incorporated into the rear bumper and is pressurized to 4 bar (60 psi).

• STORED ENERGY HAZARD

Contact with fluid under pressure may cause injury.

• DO NOT SERVICE THE ACCUMULATOR BEFORE RELEASING PRESSURE BY APPLYING BRAKES 25 TIMES WITH ENGINE OFF.

Do not service pressurized water system until air pressure is fully released by depressing the water system spray nozzle.

Tank fill plug has a cross drilled vent hole. Do not replace with standard plug.

Refer to PRESSURIZED WATER SYSTEM MAINTENANCE in SECTION 3.

• THE ACCUMULATOR HAS 3000 PSI OF STORED ENERGY. SERVICING THE ACCUMLATOR BEFORE RELEASING PRESSURE COULD RESULT IN DEATH OR SERIOUS INJURY.

39945BENG R0

This label warns of a stored energy hazard.

The machine is equipped with an accumulator (located in the front chassis). The accumulator has stored energy in the form of hydraulic pressure. Servicing the accumulator or any hydraulic components before releasing pressure could result in death or serious injury.

Do not service accumulator or any hydraulic components before releasing pressure.

Refer to RELEASE PILOT SYSTEM PRESSURE in THIS SECTION.

1.37

Safety

Tigercat T726G Trencher

FIRE PREVENTION!

CHECK DAILY

This label advises operator's of the following:

In addition to the FIRE PREVENTION label, this label is a reminder to check the machine daily for the possibility of debris build-up, leaks, damaged wires and hoses and take the necessary action required to clean up any debris accumulation, repair any leaks, damaged wires or hoses.

Read understand and follow the fire prevention guidelines in this manual. These guidelines provide all the necessary action required to preventing fires on this machine. Do not operate this machine until you have read these instructions and have performed any necessary maintenance required that will prevent the potential of a fire from starting on this machine.

It is also important to note that fire prevention inspections and maintenance must be performed frequently (several times per day). A clean combustible free machine as well as frequent inspections of the exhaust components, hydraulic hoses and electrical cables and performing any necessary repairs immediately will help prevent fires.

The label also advises to check and ensure that all fire fighting devices are in good working order.

FIRE EXTINGUISHER ACCESS HOLE

Maintain a charged fire extinguisher on the machine at all times, know where it is and know how to use it!

This label indicates the location of each fire extinguisher access hole. The label is installed on each fire extinguisher hole on the engine hood.

1.38

Tigercat T726G Trencher

Safety

NOTICE LABELS The following notice labels must be periodically cleaned and inspected to ensure legibility is maintained. Replace any label that becomes illegible, damaged or is removed.

ENGINE COOLANT SHUT-OFF VALVE (MACHINES EQUIPPED WITH ENGINE COOLANT HEATER)

ENGINE IDLE (TIER 4F MACHINES ONLY)

This label informs operators that damage to the engine coolant heater pump may result if the engine coolant heater is operated with the engine coolant shut-off valve closed.

This label informs operators that damage to the emission control system will result when the engine has idled longer than one hour.

1.39

Safety

Tigercat T726G Trencher

1.40

CONTROLS AND OPERATION...........................................................................................................................2

Tigercat T726G Trencher SECTION 2 – CONTROLS AND OPERATION Read and understand the entire contents of this manual, and all manuals for any attachments or accessories associated with this machine, prior to operating or servicing this equipment.

CONTENTS – SECTION 2

ISSUE 3.0, APRIL 2020

A

AIR COMPRESSOR – AIR SUPPLY......................................................................................................................... 2.95 DRAINING THE SYSTEM...................................................................................................................................... 2.95 AIR CONDITIONING CONTROLS........................................................................................................................... 2.17 AIR VENTS, CAB....................................................................................................................................................... 2.18 ALARM....................................................................................................................................................................... 2.24 ALARM LIGHT........................................................................................................................................................... 2.14 AUDIO SYSTEM........................................................................................................................................................ 2.20 AUXILIARY POWER SUPPLY, 12 VOLT.................................................................................................................. 2.16

B

BATTERY BOOSTING.............................................................................................................................................. 2.92 BATTERY DISCONNECT SWITCH......................................................................................................................... 2.22 BLUETOOTH FUNCTIONS...................................................................................................................................... 2.20 BRAKES..................................................................................................................................................................... 2.12

C

CAMERA AND MONITOR......................................................................................................................................... 2.23 CIGAR/CIGARETTE LIGHTER................................................................................................................................ 2.16 COLD WEATHER STARTING................................................................................................................................. 2.101 COMPUTER ENGINE MENU....................................................................................................................................................... 2.34 ECO MODE FUNCTION..................................................................................................................................... 2.37 FUEL INFORMATION FUNCTIONS.................................................................................................................. 2.37 ADJUSTMENT MENU............................................................................................................................................ 2.38 ATTACHMENT SELECTION.............................................................................................................................. 2.43 CUTTER FORWARD TRAVEL SPEED............................................................................................................. 2.45 CUTTER REVERSE TRAVEL SPEED.............................................................................................................. 2.45 DRIVE LIMITER.................................................................................................................................................. 2.41 DRUM SPEED – FORWARD............................................................................................................................... 2.44 DRUM SPEED – REVERSE................................................................................................................................ 2.44 FAN CLEAN DURATION.................................................................................................................................... 2.40 FAN CLEAN FREQUENCY................................................................................................................................ 2.40 HYDRAULIC OIL GRADE SELECTION............................................................................................................ 2.39 REAR DOOR LIGHTS........................................................................................................................................ 2.42 WHEEL/TIRE....................................................................................................................................................... 2.43 INFORMATION MENU........................................................................................................................................... 2.46 CUTTER FUNCTIONS........................................................................................................................................ 2.48 UNITS OF MEASURE......................................................................................................................................... 2.49 MAIN MENU............................................................................................................................................................ 2.50 INFO MENU......................................................................................................................................................... 2.56 MEASURE MENU............................................................................................................................................... 2.51 PREFERENCES MENU...................................................................................................................................... 2.52 MAIN SCREEN....................................................................................................................................................... 2.33 MESSAGES............................................................................................................................................................ 2.58 MESSAGES – ALERT............................................................................................................................................. 2.77 ATTACHMENT CHARGE FILTER BYPASS...................................................................................................... 2.78 DIESEL EXHAUST FLUID LEVEL..................................................................................................................... 2.90 DIESEL EXHAUST FLUID QUALITY................................................................................................................. 2.88 DRIVE CHARGE FILTER BYPASS................................................................................................................... 2.79 ENGINE AIR INTAKE FILTER RESTRICTED................................................................................................... 2.78

Controls and Operation

Tigercat T726G Trencher

ENGINE COOLANT TEMPERATURE HIGH.................................................................................................... 2.81 ENGINE FAULT CODE MESSAGES................................................................................................................. 2.80 ENGINE IDLE AUTOMATICALLY INCREASED............................................................................................... 2.81 ENGINE TORQUE DERATE ACTIVE................................................................................................................ 2.82 ENGINE VOLTAGE HIGH................................................................................................................................... 2.80 ENGINE VOLTAGE LOW.................................................................................................................................... 2.80 FIRE DETECTION SYSTEM MALFUNCTION................................................................................................. 2.79 FUEL LEVEL LOW.............................................................................................................................................. 2.82 HARDWARE FAILURE – CURRENT OUTPUT.................................................................................................. 2.84 HARDWARE FAILURE – DIGITAL INPUT.......................................................................................................... 2.84 HARDWARE FAILURE – DIGITAL OUTPUT...................................................................................................... 2.84 HARDWARE FAILURE – VOLTAGE INPUT....................................................................................................... 2.84 HARDWARE FAULT – MD3 (COMPUTER)........................................................................................................ 2.83 HARDWARE FAULT – XA2-A0............................................................................................................................ 2.83 HARDWARE FAULT – XA2-A1............................................................................................................................ 2.83 HYDRAULIC OIL FILTER RESTRICTED.......................................................................................................... 2.83 MACHINE VOLTAGE HIGH................................................................................................................................ 2.79 MACHINE VOLTAGE LOW................................................................................................................................. 2.79 MODULE HIGH SUPPLY VOLTAGE – ALERT................................................................................................... 2.85 MODULE HIGH TEMPERATURE – ALERT....................................................................................................... 2.85 MODULE LOW SUPPLY VOLTAGE – ALERT................................................................................................... 2.87 WATER IN FUEL................................................................................................................................................. 2.82 MESSAGES – CRITICAL........................................................................................................................................ 2.59 AFTERTREATMENT SYSTEM ENGINE IDLE TOO LONG............................................................................ 2.72 DIESEL EXHAUST FLUID QUALITY................................................................................................................. 2.70 ENGINE COOLANT LEVEL LOW...................................................................................................................... 2.64 ENGINE COOLANT TEMPERATURE HIGH.................................................................................................... 2.65 ENGINE COOLANT TEMPERATURE HIGH – ENGINE DERATE................................................................... 2.65 ENGINE FAULT CODE MESSAGES – CRITICAL............................................................................................. 2.62 ENGINE LOCKED OUT...................................................................................................................................... 2.71 ENGINE OIL PRESSURE LOW......................................................................................................................... 2.63 ENGINE OIL PRESSURE LOW – ENGINE DERATE........................................................................................ 2.63 ENGINE OIL TEMPERATURE HIGH................................................................................................................. 2.64 ENGINE STARTS REMAINING UNTIL ENGINE LOCKOUT........................................................................... 2.71 FIRE DETECTED................................................................................................................................................ 2.62 HARDWARE FAULT – ENGINE.......................................................................................................................... 2.67 HARDWARE FAULT – MD3 (COMPUTER)........................................................................................................ 2.66 HARDWARE FAULT – XA2-A0............................................................................................................................ 2.66 HARDWARE FAULT – XA2-A1............................................................................................................................ 2.67 HYDRAULIC OIL LEVEL LOW........................................................................................................................... 2.60 HYDRAULIC OIL RETURN FILTERS BYPASSED................................................................................. 2.33, 2.61 HYDRAULIC OIL TEMPERATURE HIGH......................................................................................................... 2.60 PUMP GEAR BOX TEMPERATURE HIGH....................................................................................................... 2.61 MESSAGES – ERROR............................................................................................................................................ 2.73 COMPUTER MODULE BLANK SCREEN......................................................................................................... 2.75 CURRENT OUTPUT ERROR (COUT).............................................................................................................. 2.75 DIGITAL INPUT ERROR (DIN)........................................................................................................................... 2.75 DIGITAL OUTPUT ERROR (DOUT).................................................................................................................. 2.75 MODULE NO CONTACT ERROR...................................................................................................................... 2.76 MODULE VREF ERROR.................................................................................................................................... 2.74 VOLTAGE INPUT ERROR (VIN)........................................................................................................................ 2.75 NETWORK.............................................................................................................................................................. 2.32 COMPUTER AND DISPLAY..................................................................................................................................... 2.14 CONTROLS – CAB....................................................................................................................................................... 2.9 COOLANT HEATER, ENGINE (OPTIONAL)........................................................................................................... 2.21 D

2.2

Tigercat T726G Trencher

Controls and Operation

DIAGNOSTICS CONNECTION, ENGINE............................................................................................................... 2.22 DRIVE CONTROL...................................................................................................................................................... 2.12 E

ECO MODE................................................................................................................................................................ 2.37 ENGINE COOLANT SHUTOFF VALVE................................................................................................................................ 2.18 DERATE SEQUENCE LOW DEF LEVEL................................................................................................................................................ 2.90 DIAGNOSTICS CONNECTION............................................................................................................................. 2.22 IDLE SPEEDS........................................................................................................................................................ 2.15 RESTARTING AFTER ENGINE RUNS OUT OF FUEL..................................................................................... 2.102 STARTING............................................................................................................................................................ 2.100 STOPPING............................................................................................................................................................ 2.103 ENGINE COOLANT HEATER (OPTIONAL)............................................................................................................ 2.21 ENGINE, RESTARTING AFTER ENGINE RUNS OUT OF FUEL........................................................................ 2.102

F

FAN SWITCH (ENGINE COOLING)......................................................................................................................... 2.16 FILTERS CAB FRESH AIR.................................................................................................................................................... 2.19 RECIRCULATING AIR – A/C UNIT.............................................................................................................. 2.18, 2.19 FIRE DETECTION SYSTEM.................................................................................................................................... 2.24 COMPONENTS...................................................................................................................................................... 2.24 FIRE EXTINGUISHER.............................................................................................................................................. 2.20 FOOT PEDAL CONTROLS....................................................................................................................................... 2.12 FUEL HEATER......................................................................................................................................................... 2.100

H

HEAD TILT................................................................................................................................................................. 2.11 HEATER, ENGINE COOLANT (OPTIONAL)........................................................................................................... 2.21 HORN......................................................................................................................................................................... 2.11

I

IGNITION KEY SWITCH........................................................................................................................................... 2.16 INSTRUMENT PANEL............................................................................................................................................... 2.14 INTERIOR CAB LIGHT SWITCH............................................................................................................................. 2.20 INTERLOCK RESET SWITCH................................................................................................................................. 2.14

J

JOYSTICKS LEFT, SPEED/DIRECTION CONTROL................................................................................................................ 2.10 RIGHT, BOOM CONTROLS.................................................................................................................................. 2.11

L

LIGHTER, 24 VOLT................................................................................................................................................... 2.16 LIGHTS HAZARD.................................................................................................................................................................. 2.16 ROAD...................................................................................................................................................................... 2.16 WORK...................................................................................................................................................................... 2.16

M

MACHINE PREPARATION..................................................................................................................................... 2.104 SYSTEM TEST AND WARM-UP......................................................................................................................... 2.104 MIRROR, REAR VIEW.............................................................................................................................................. 2.20

O

OPERATING MACHINE............................................................................................................................................ 2.96

P

PARKING BRAKE SWITCH...................................................................................................................................... 2.15 PICTOGRAMS............................................................................................................................................................. 2.5 PRESTART CHECKS................................................................................................................................................ 2.96

R

2.3

Controls and Operation

Tigercat T726G Trencher

REAR VIEW MIRROR............................................................................................................................................... 2.20 REFUELLING............................................................................................................................................................. 2.94 S

SEAT........................................................................................................................................................................... 2.28 ADJUSTMENTS..................................................................................................................................................... 2.28 PROBLEMS AND CORRECTIVE ACTION.......................................................................................................... 2.29 SPEED/DIRECTION CONTROL.............................................................................................................................. 2.10 STARTING ENGINE................................................................................................................................................ 2.100 COLD WEATHER STARTING............................................................................................................................. 2.101 STEERING COLUMN STEERING WHEEL................................................................................................................................................ 2.13 STOPPING ENGINE............................................................................................................................................... 2.103 SWITCHES AIR CONDITIONING.............................................................................................................................................. 2.17 AIR SOURCE.......................................................................................................................................................... 2.17 DRUM...................................................................................................................................................................... 2.15 ENGINE SPEED..................................................................................................................................................... 2.15 FAN SPEED, HVAC................................................................................................................................................ 2.17 HAZARD LIGHTS................................................................................................................................................... 2.16 HEAT CONTROL.................................................................................................................................................... 2.17 HIGH BEAM/LOW BEAM....................................................................................................................................... 2.16 IGNITION KEY........................................................................................................................................................ 2.16 INTERIOR CAB LIGHT.......................................................................................................................................... 2.20 JOYSTICK............................................................................................................................................................... 2.11 PARKING BRAKE................................................................................................................................................... 2.15 ROAD LIGHTS........................................................................................................................................................ 2.16 TURN SIGNAL........................................................................................................................................................ 2.13 WATER SPRAY....................................................................................................................................................... 2.11 WINDSHIELD WASHER........................................................................................................................................ 2.13 WINDSHIELD WIPER............................................................................................................................................ 2.13 WORK LIGHTS....................................................................................................................................................... 2.16

U

USB PORT COMPUTER............................................................................................................................................................ 2.22

W

WATER SPRAY.......................................................................................................................................................... 2.11

2.4

Tigercat T726G Trencher

Controls and Operation

PICTOGRAM DESCRIPTIONS Diagrams in pictorial form are used to represent machine function operation. They are a simple universal language of symbols or pictograms that illustrate a function or component without the use of words.

= Brake Pedal

Examples of these pictograms are the turtle and the rabbit , often used to describe speed such as SLOW = or FAST = .

P

P= Control Lever Multiple Direction = Control Lever One Direction = Control Lever Two Direction

= Adjustment Menu

= Creep State – Speed Very Slow = Air Conditioner ON

= Cigarette Lighter, 24 Volt

=Air Conditioner OFF = Critical Message = Air Source, Fresh Air = Drum – Forward Rotation = Air Source, Recirculate = Drum – OFF = Alert Message = Drum – Momentary Reverse = 12V, Auxiliary Power Outlet = 24V, Power Outlet

= Attachment Side Plates – Right Selected

= Battery

= Attachment Side Plates – Left Selected

= Battery Disconnect

= Attachment Side Plates – Both Selected

= Boom DOWN

= Drum Water Spray – Always ON

= Boom UP

= Drum Water Spray – OFF

= Attachment Tilt Backward

= Drum Water Spray – AUTO On When Trenching

= Attachment Tilt Forward

= Diesel Exhaust Fluid (DEF, AUS32, AdBlue) 2.5

Controls and Operation

Tigercat T726G Trencher

= Defrost, Front Window

= Engine Speed

= Drive Limiter Enabled

= Engine WAIT TO START = Engine Warning

= Drive Motor Speed

= Engine Menu Icon = Drive Pressure, FORWARD = Error Message = Drive Pressure, REVERSE

= Fan Purge Auto Setting

= Engine ECO MODE (If applicable) = Engine Anti-stall

= Fan Full ON AUTO

= Engine Anti-stall ON

= Fan REVERSE/CLEAN

= Engine Anti-stall OFF

= Fan – Ventilation Blower

= Engine Charge Air Temperature

= Foot Pedal Control

= Engine Diagnostics

= Fuel Consumption Rate

= Engine Emission System Failure or

%

= Fan AUTOMATIC

= Fuel – Diesel

= Engine Emission System Temperature

= Fuel Heater

= Engine Oil Temperature

= Fuel Information

= Engine – Percentage of Load

= Fuel Reset

= Engine Run

= Fuel Temperature

= Engine Speed – rpm

= Hours – Engine

= Engine Start

= Hours – Machine

= Engine Stop 2.6

Tigercat T726G Trencher

Controls and Operation

= Horn

= Metric/Imperial Toggle

P

= Hydraulic Oil Filter Bypass

= Parking Brake

= Hydraulic Oil Grade

Pi = Hydraulic Oil Level

= Pilot Pressure

= Interlock (Pilot) System OFF

= Hydraulic Oil Tank = Interlock (Pilot) System ON (Reset) = Hydraulic Oil Tank Pressure Switch = Serial Number = Hydraulic Oil Temperature = Speed FAST = Information Menu

= Speed SLOW

= Information Message

= Steer Right

= Lights – Left/Right Turn Signals = Steer Left = Lights – Hazard = Switch ON

= Lights – High Beam = Lights – Low Beam

= Switch OFF

= Lights – ROAD

= Temperature

= Transmission Drive Motor Speed

= Lights – Reverse

LS

= Roadway Travel Mode

= Load Sense Pressure = Lubricate/Grease

= Vacuum

= Machine 2.7

Controls and Operation

Tigercat T726G Trencher

2.8

Tigercat T726G Trencher

Controls and Operation

CONTROLS – CAB A G B T726G-012

E

F

D

T726G-011

C

L

M

H

I

J

K

G

N

O

P T726G-010

A B C D E F G H

Steering Wheel Turn Signal/Wiper/Washer Fire Extinguisher Foot Rest Brake Pedal Drive Pedal Fuse and Relay Panel Left Side Door Interlock Switch

I J K L M N O P

2.9

Left Joystick Seat Right Joystick Alarm Light Right Side Door Interlock Switch Control Panel Heater A/C Controls Pilot Manifold (Under Cab)

Controls and Operation

Tigercat T726G Trencher

IMPORTANT! This manual is applicable to factory installed machine functions and controls. It does not take into account any changes or modifications made after shipment. Verify all functions before operating this machine.

JOYSTICK CONTROLS

JOYSTICK – LEFT, SPEED DIRECTION/ CONTROL B

C

A

D 45496AUNI R0

A B C D

Collar Forward Neutral Detent Reverse

700554

ROADING OPERATION – DRUM SWITCH OFF Lift the collar up to allow the speed/direction control joystick to move out of the neutral position. With the collar lifted, push the joystick forward to put the machine into F (forward) drive mode, or pull the joystick backward to put the machine into R (reverse) drive mode. The maximum available drive speed is proportional to how far the joystick is pushed forward (forward drive speed) or pulled backward (reverse drive speed). The available drive speed increases proportionally from zero to maximum as you slide the handle away from the neutral position in either direction. To achieve maximum travel speed, the joystick must be pushed all the way forward or pulled all the way backward and the drive speed foot pedal pressed all the way down.

NOTE: With the drum switch OFF, the machine will not travel until the parking brake switch P is turned OFF and the drive speed foot pedal is pressed.

CUTTING OPERATION – DRUM SWITCH

ON

CAUTION When the attachment is on, the parking brake switch is OFF and the speed/direction control joystick is moved out of neutral, the machine will travel automatically.

With the attachment on, lift the collar up to allow the joystick to move out of the neutral position. With the collar lifted, push the joystick forward to begin forward travel with the drum rotating, or pull the joystick backward to begin reverse travel with the drum rotating.

The travel speed while cutting is proportional to how far the joystick is pushed forwards (forward speed) or pulled backwards (reverse speed). To achieve maximum travel speed with the attachment on, the joystick must be pushed all the way forward or pulled all the way backward.

NOTE: To turn the attachment on, the speed/direction control joystick must be in the neutral position. Maximum travel speed is reduced when the attachment is on. The machine will not travel until the parking brake switch P is turned OFF.

2.10

Tigercat T726G Trencher

Controls and Operation

JOYSTICK – RIGHT, BOOM CONTROLS A

C

B

D

JOYSTICK SWITCHES

700223

A

A Side Plate Selection Icon

SIDE PLATE SELECTION (IF EQUIPPED) Push the switch to cycle/select either left , right or both side plates . The selection icon is displayed on the computer main screen.

The side plates need to be shifted during the replacement of the drum or when shifting the position of the attachment relative to the machine.

700557

Whenever possible, cutting should be done with the attachment positioned in the centre of the machine.

Offsetting the attachment to the right side is required when cutting close to the edge of the road or along a street curb.

Cutting with the attachment offset to the left side should not be done.

SIDE PLATE SHIFT (IF EQUIPPED) This is a variable, return-to-centre-neutral switch. This switch selects the direction of movement of the selected side plate(s), either to the left or to the right.

Slide the switch to the right or left to shift the selected side plate(s) to the right or left. Release the switch to stop side plate(s) shift.

Before using the side plate switches, set engine speed at LOW. HORN BUTTON

A B C D

Side Plate Selection Water Spray – Trigger Switch Horn Button Side Plate Shift

Push the button to sound the horn.

WATER SPRAY – TRIGGER SWITCH

• Move the joystick FORWARD to LOWER the boom.

Pull the trigger switch to cycle/select the water spray between ON (always on) OFF (always off) or AUTO (on when cutting) . The selection icons are displayed on the computer main screen.

• Move the joystick BACK to LIFT the boom.

Water is used to control dust during cutting.

BOOM LIFT

ATTACHMENT TILT • Move the joystick to the RIGHT to tilt the attachment OUT. • Move the joystick to the LEFT to tilt the attachment IN. 2.11

Controls and Operation

Tigercat T726G Trencher

FOOT PEDAL CONTROLS C

B

A

DRIVE SPEED PEDAL The drive speed pedal controls the travel speed from zero to maximum available as set by the speed/direction control joystick. The speed is proportional to how far the pedal is pressed. Refer to JOYSTICKS – LEFT,SPEED/ DIRECTION CONTROL in THIS SECTION. NOTE: When the drum switch is ON the drive speed pedal does not perform any function.

BRAKE PEDAL Depress the brake pedal to apply the rear axle brakes when rapid braking is required.

Under normal operating conditions the machine will brake automatically.

T726G-014

NOTE: There are three braking systems on this machine: • The hydrostatic braking system, which is part of the drive system, functions when the drive speed foot pedal is released. This should be considered the primary brake.

• The rear axle brake is actuated by the brake pedal.

The parking brake is applied and released by a switch on the instrument panel. It is a spring applied and hydraulically released brake. Refer to SWITCHES – PARKING BRAKE in THIS SECTION.

A Drive Speed Foot Pedal B Brake Foot Pedal C Foot Rest

2.12

Tigercat T726G Trencher

STEERING COLUMN

Controls and Operation TILT STEERING COLUMN Press and hold the push button to release tilt lock, move steering wheel to desired position. Release button to lock steering column in place.

TURN SIGNAL SWITCH Push UP to activate the RIGHT turn signal lights.

D

Pull DOWN to activate the LEFT turn signal lights.

NOTE: Both the front and rear amber lights will flash.

C

WINDSHIELD WIPER SWITCH

E

Rotate to first or second position for LOW or HIGH windshield wiper speed.

WINDSHIELD WASHER SWITCH Push the button on end of lever to spray washer fluid on windshield.

T726G-028

A B C D E

B

A

Steering Wheel Tilt Steering Column Turn Signal Switch Windshield Wiper Switch Windshield Washer Switch

STEERING WHEEL This machine is equipped with variable ratio load sense steering. When operating on the road, a slow movement of the steering wheel will produce slower steering. Quick steering changes require rapid movement of the steering wheel.

CAUTION The steering system is always LIVE when the engine is running. Do not use the steering wheel to assist entering or leaving the cab.

2.13

Controls and Operation

Tigercat T726G Trencher

INSTRUMENT PANEL

ALARM LIGHT This light flashes to alert the operator that an alarm condition has been detected and should be dealt with immediately. All messages can be viewed on the computer display on the instrument panel.

A B

Refer to the COMPUTER – MESSAGES in THIS SECTION.

INTERLOCK RESET SWITCH H I J

C

K

D

L

E

This switch is used to reset the interlock system after it is deactivated by opening either of the cab doors, or by turning the ignition switch to the OFF position.

This system prevents accidental or improper use of the controls from anywhere but the operator's seat.

With the engine running, and both doors closed, press and release the switch to reset the interlock system.

M N

F

O G

A

B

T726G-007

A B C D E F G H I J K L M N O

Computer and Display Alarm Light Interlock Reset Switch Engine Speed Switch Drum Switch Parking Brake Switch Ignition Key Switch Fan Switch (Engine Cooling) Work Lights Switch Optional Switch Location Hazard Lights Switch Road Lights Switch High Beam/Low Beam Switch 12 Volt Auxiliary Power Supply 24 Volt Lighter

The instrument panel is located on the right side of the cab beside the operator's seat right armrest. The following controls and switches are mounted on the instrument panel:

T726G-002

A Actuator (On Door) B Interlock Door Switch (Left Door Shown)

The left and right doors are equipped with an interlock door switch to prevent the machine from being operated with the doors open. To operate the machine, close both doors and press and release the interlock reset switch.

CAUTION All functions on the machine can now be operated, either as intended or by accidentally touching them.

Once the interlock system has been activated, the safety of both the operator and all persons outside the cab becomes the responsibility of the operator.

WARNING

COMPUTER AND DISPLAY The computer and display module is the operator's interface with the electronic control system. This module is the central unit in the control system which works as both a master controller and a display unit. Refer to COMPUTER in THIS SECTION for complete details and operation instructions.

The interlock door switches and the interlock reset switch are safety features and their function must not be defeated in any way.

2.14

Tigercat T726G Trencher

Controls and Operation

ENGINE SPEED SWITCH This is a momentary switch used to increase/decrease engine speed. Press on bottom of switch to decrease engine speed. Press on top of switch to increase engine speed.

MAINTAINING CORRECT ENGINE RPM It is most important the rpm of the engine be correct at all times:

NOTE: If the engine is turned off or the interlock system has been deactivated with the drum switch in the ON position, the drum will not start-up again when the engine is restarted or the interlock system is activated.

The drum switch must be turned off and then back on for the drum to start. Always decrease engine speed to LOW for several minutes to allow the drum to slow down before turning the drum off.

OFF

• LOW – 900 ± 25 rpm (No Load)

Drum is turned off, icon colour is grey.

• HIGH – 1850 ± 25 rpm (No Load)

MOMENTARY REVERSE

NOTE: The above values are with the hydraulic and engine oil at normal operating temperatures and no functions activated.

This switch position is used for slowly rotating the drum in reverse and for turning or indexing the drum slowly for inspection and alignment during drum replacement.

DRUM SWITCH

Before using MOMENTARY REVERSE, set engine speed to LOW. Press and hold the MOMENTARY REVERSE switch.

This is a three position switch.

NOTE: In order for the attachment drum to be turned on, the speed/direction control joystick must be in the neutral position. After it is on, the machine can be moved forward or backward by moving the speed/direction control joystick accordingly.

ON

Release the MOMENTARY REVERSE switch to stop the drum rotation.

DRUM PRESSURE INDICATOR

– FORWARD ROTATION

700223

A

A Drum Icon

Set engine speed at HIGH before turning the drum switch ON for normal operations. Drum rotates at FULL speed in the FORWARD direction. The drum icon on the computer display is green when the drum is ON.

Each increment on the gauge represents approximately 69 bar (1000 psi). The pressure indicator rises with increased drum system pressure. This can occur during initial start-up of the drum, increased working load on the drum or a stalled drum. The pressure indicator falls as the drum system pressure decreases. This occurs as the drum gets up to full speed, a decreased working load on the drum or the drum switch is off.

PARKING BRAKE SWITCH

P

This is a two position switch which operates a driveline brake.

Press the top of this switch (ON) to apply the parking brake. The parking brake icon on the main computer display illuminates RED when the parking brake is applied.

Press the bottom of this switch (OFF) to release the parking brake.

NOTE: The parking brake must be applied to START the engine, and released to drive the machine.

2.15

Controls and Operation

Tigercat T726G Trencher

NOTE: The interlock system prevents the machine from being driven and function controls from being operated, except for steering.

As part of the interlock system this machine automatically applies the parking brake whenever a cab door is open. This prevents accidental or improper operation of the controls from anywhere but the operator's seat.

Refer to COMPUTER–MESSAGES–CRITICAL– INTERLOCK SYSTEM in THIS SECTION.

IGNITION KEY SWITCH This is a three-position switch.

STOP position – All electrical power fed through the ignition switch is turned OFF. RUN position – Connects the battery to electrical functions used for machine operation.

START position – Used to energize the starter motor to start the engine.

FAN SWITCH (ENGINE COOLING) A B C

NOTE: The computer is programmed to reverse fan direction automatically when the fan switch is in the AUTO position. The default setting is reverse every ten minutes for ten seconds, This setting is adjustable. Refer to COMPUTER – ADJUSTMENT MENU – FAN CLEAN FREQUENCY AND FAN CLEAN DURATION in THIS SECTION for adjustment information.

CLEAN – When the switch is pressed momentarily to the CLEAN position, the fan direction is reversed to help clean the charge air cooler, radiator, A/C condenser, hydraulic oil cooler and air intake door screen. By reversing the fan blade direction, air flow is propelled in the opposite direction, thereby helping to force dust and debris off of the heat exchanger cores and screens.

It is also important to manually clean debris from the machine on a regular basis to maintain low machine operating temperatures. Refer to CLEANING COOLER PACKAGE in SECTION 3.

WORK LIGHTS SWITCH This is a two-position switch. It is used to turn the work lights ON/OFF.

HAZARD LIGHTS SWITCH This is a two-position switch. It is used to turn the hazard lights ON/OFF.

ROAD LIGHTS SWITCH This is a two-position switch. It is used to turn the road lights ON/OFF.

724G-011

A Full ON B Auto C Clean (Purge)

This is a three-position momentary switch, FULL ON/ AUTO/CLEAN. This switch, along with the computer, controls the operation of the engine cooling fan.

FULL ON (OVERRIDE) – When the switch is in the FULL ON position, the fan control system is overridden and the fan will operate at full forward speed. This setting is intended for use in the event of a temporary failure of the fan control system. AUTOMATIC reversing/ cleaning does not function with the switch in the FULL ON position.

HIGH BEAM/LOW BEAM SWITCH This is a two position switch. It is used to toggle between HIGH and LOW beam headlights.

AUXILIARY POWER SUPPLY – 12 VOLT A 12 volt outlet with 20 amp capacity for portable devices such as cell phones.

LIGHTER – 24 VOLT Cigar/cigarette lighter.

OPTIONAL SWITCH LOCATIONS For use with optional equipment that requires a control panel switch.

AUTO – This is the normal operating position for the fan control switch. When the switch is in the AUTO position, the fan will operate completely in an automatic mode.

2.16

Tigercat T726G Trencher

Controls and Operation

HEAT AND AIR CONDITIONING CONTROLS B

A

C

D

E

A/C CONTROL KNOB This is a variable, rotary switch to adjust the temperature of cooled air for the cab.

NOTE: To maximize the efficiency of the air conditioning, the heat control knob on the control panel must be set to the OFF position and the engine coolant shut-off valve on the engine should be turned to the CLOSED position.

Refer also to ENGINE COOLANT SHUTOFF VALVE in THIS SECTION. IMPORTANT! During cold weather, when the A/C system is not in use, it is recommended to run the A/C system for a period of five minutes every two weeks. This will circulate oil to all components of the A/C system.

M726E-050

A B C D E

A/C On/Off Switch Fan Speed Knob Air Source Knob Heat Control Knob A/C Control Knob

The controls on this panel are used to adjust the heating and air conditioning temperature for operator comfort in the operator's cab.

A/C ON/OFF SWITCH This is a push ON push OFF power switch.

FAN SPEED KNOB This is a rotary, four-position (OFF/LOW/MED/HIGH) switch for the fan speed.

AIR SOURCE KNOB This is a rotary, two position switch to select either outside fresh air, or to recirculate inside air. To maximize the use of A/C, place the control in the recirculate mode.

HEAT CONTROL KNOB This is a variable, rotary switch to adjust the amount of heated air for the cab. This control must be set to the OFF position before using the air conditioning.

2.17

Controls and Operation

Tigercat T726G Trencher

ENGINE COOLANT SHUTOFF VALVE

AIR VENTS – CAB

A

700109

B

A

M726E-001

B

A Air Vents B Recirculating Air Filter – A/C Heater Unit

C

The A/C heater system has seven air outlets in the cab.

700147

A Engine Coolant Shut-off Valve B Hose to A/C Heater Unit in Cab C Engine

The engine coolant shut-off valve is located on the heater hose from the engine, located on the left side of the machine at the rear of the engine. It is accessed through the left side engine compartment panel or door.

During times when cab heating is not required, close the engine coolant shut-off valve to prevent warm engine coolant from seeping through the A/C unit, thereby reducing the effect of the cooling.

2.18

Tigercat T726G Trencher

Controls and Operation

FILTER, RECIRCULATING AIR – A/C HEATER UNIT A

700071

A Recirculating Air Filter

When the air source knob is in the RECIRCULATING AIR position, air in the cab is drawn into the A/C heater unit through this filter and recirculated. The filter is located at the base of the A/C heater unit.

Refer to AIR CONDITIONING SYSTEM– CAB AIR FILTERS in SECTION 3 for servicing requirements.

FILTER, CAB FRESH AIR A

700235

A Fresh Air Filter – Cab

When the air source switch (right control panel) is in the FRESH AIR position, outside air is drawn into the cab A/C-Heater unit through this filter and mixed with interior air from the cab. The filter is located in the rear of the cab roof and accessible from outside the cab.

Refer to AIR CONDITIONING SYSTEM– CAB AIR FILTERS in SECTION 3 for servicing requirements.

2.19

Controls and Operation

Tigercat T726G Trencher

AUDIO SYSTEM

REAR VIEW MIRROR A

A

B

726G-001

A AM/FM Stereo Radio/CD Player B Hands Free Microphone

The AM/FM/CD stereo radio includes a hands-free microphone and two rear-mounted speakers.

The AM/FM/WB/CD/RBDS/USB SiriusXM™ Ready and iPod™ Ready Stereo with Bluetooth® is located on the right rear of the cab roof.

Refer to the MANUFACTURER'S DOCUMENTATION for complete operation instructions.

T726G-011

A Rear View Mirror

A convex rear view mirror is located above the front window to assist in the view out the rear windows. Use the mirror when driving the machine in reverse.

FIRE EXTINGUISHER

BLUETOOTH FUNCTIONS

A

The radio includes built in Bluetooth technology that allows you to connect it to Bluetooth devices for streaming audio playback and hands free calling. The hands free microphone is located in the radio enclosure and is connected to the radio.

Refer to the MANUFACTURER'S DOCUMENTATION for complete operation instructions.

B

INTERIOR CAB LIGHT SWITCH T726G-010

A Pressure Gauge B Fire Extinguisher

A

B

M726E-049

A Interior Cab Light B CB Radio

The switch is located on the side of the light fixture.

CB RADIO (IF EQUIPPED)

A portable fire extinguisher is located in operator's cab.

The extinguisher should be checked daily to ensure that it is charged. The pointer on the charge gauge should point to the green region. If the indicator falls out of this green area, the extinguisher should be serviced immediately.

Maintain a CHARGED fire extinguisher on the machine at all times and KNOW HOW TO USE IT. Refer to the MANUFACTURER'S DOCUMENTATION for proper usage, additional information and recommended inspection and maintenance intervals.

Consult the manufacturer's instruction manual for additional information.

2.20

Tigercat T726G Trencher

Controls and Operation

ENGINE COOLANT HEATER (OPTIONAL)

CONTROL PANEL – EARLIER DESIGN

F

A 1075-087B

E

CONTROL PANEL – LATER DESIGN

D

A

F

E

E

D

B

C B

LS855D-015

A B C D E F

700496

F

C

ON/OFF Button LCD Screen Micro USB Service Port Selection Button Status Indicator Light(s) Rotary Knob

The digital timer is located to the right rear of the cab under the window.

This digital timer is used on machines equipped with the optional diesel-operated engine coolant heater.

This heater heats and circulates the engine coolant through the engine, the hydraulic tank, and the cab.

700244

A B C D E F

Engine Coolant Heater Diesel Fuel Tank – Engine Coolant Heater Hydraulic Oil Heater Coolant Pump Coolant Heater Combustion Air Intake Combustion Exhaust

The heater and heater fuel tank are located in the battery compartment at the rear left of the machine.

There is a solenoid valve controlling the flow of coolant to the hydraulic tank heater. This solenoid valve is controlled directly by the heater unit. The programming of the heater unit in the cab will determine when the heater is ON and when it will turn OFF. Consult the manufacturer's instruction manual for additional information.

2.21

Controls and Operation

Tigercat T726G Trencher

BATTERY DISCONNECT SWITCH

ENGINE DIAGNOSTICS CONNECTION

A A B 700087

A Battery Disconnect Switch

This manually-operated switch is located in the top of the battery compartment on the left rear corner of the machine. It completely disconnects most electrical circuits from the battery.

Turn OFF the battery disconnect switch if the vehicle is to be parked for an extended period of time, such as overnight.

NOTE: This machine is equipped with an After Run/ Accessory Relay which delays, by 90 seconds, the power disconnect to engine related fuses and relays (ECU /ATS relay, NOx sensor relay, NOx sensor fuse, ECU power fuse, DCU fuse). Whenever the engine is turned OFF, all DEF solution is pumped back to tank before the engine power system is turned OFF. This process takes approximately 90 seconds. Refer to AFTERTREATMENT SYSTEM in SECTION 3 for more information.

IMPORTANT! Use the battery disconnect switch to turn OFF a running machine in an emergency only. A fault code will be logged by the ECU on the engine for improper shut down and power down.

T726G-021

A Engine Diagnostics Connection B USB Connection Port – Computer

The engine diagnostics connection is located in the compartment just below the instrument panel.

Plug a remote electronic diagnostic device into this connection such as a laptop computer with appropriate engine manufacturer’s programming to perform engine performance analysis and tuning.

IMPORTANT! This operation can only be performed by a trained service technician.

USB PORT – COMPUTER The USB port is located in the compartment just below the instrument panel.

This USB port is used to access the computer. A laptop with appropriate software can be plugged into this port for software updates, diagnostics and some adjustments.

IMPORTANT! The USB port can only be used by a trained service technician.

Refer to COMPUTER in SECTION 6 of the SERVICE MANUAL for more information and safeguards related to the use of this port.

2.22

Tigercat T726G Trencher

Controls and Operation

CAMERA AND MONITOR

CAMERA SYSTEM COMPONENTS

A

T726G-011

480-006A

B

700234

The system consists of the monitor, wire harness, junction box, and camera. The camera is mounted on the rear door of the machine. Once the power is on, the view to the rear of the vehicle will always be displayed on the monitor.

Refer to the MANUFACTURER’S OWNER’S MANUAL (located in the operator's manual storage compartment behind the seat) for complete operating instructions for the camera system.

A Camera Monitor B Rear Door Camera

A rear-facing digital camera mounted low on the rear door provides the operator with a better view when driving the machine in reverse.

The camera monitor is mounted on the front, top right of the cab. The monitor is a high performance 17.78 cm (7 in) wide format, flat panel, colour, LCD, video display.

2.23

Controls and Operation

Tigercat T726G Trencher

FIRE DETECTION SYSTEM NOTE: This system is for FIRE DETECTION ONLY, it is not a fire suppression system.

In no way does the installation of this fire detection system reduce the need to adhere to the guidelines provided in FIRE PREVENTION in SECTION 1.

FIRE DETECTION SYSTEM COMPONENTS The Fire Detection System consists of the following main components:

ALARM LIGHT AND ALARM

The fire detection system is only a warning system and will not extinguish a fire. If a fire is detected, it must be extinguished manually using certified fire fighting equipment.

A

SYSTEM OPERATION There are three thermostats mounted in the engine and hydraulic area that are connected to the computer control system. The thermostats are automatic heat detection devices and are set to close at 177°C (350°F).

T726G-077

A Alarm Light

The in-cab alarm light is on the instrument panel. The audible alarm (not shown) is in the compartment below the instrument panel.

M726E-134

When a thermostat closes, it sends a signal to the computer which activates an alarm, an alarm light and a visual warning on the computer display indicating that a fire has been detected.

IN CASE OF FIRE DETECTION ALARM: 1. Park the machine on level ground with the attachment resting firmly on the ground.

2. Apply the parking brake.

3. Turn OFF the engine.

4. Remove the ignition key.

5. Remove the portable fire extinguisher from its storage location.

6. Exit the cab immediately taking the fire extinguisher with you.

7. Inspect the machine for the cause of the alarm.

Refer to FIRE PREVENTION– WHAT TO DO WHEN A MACHINE FIRE OCCURS and FIRE PREVENTION– WHAT TO DO AFTER A MACHINE FIRE HAS OCCURRED in SECTION 1.

2.24

Tigercat T726G Trencher THERMOSTAT – PUMP COMPARTMENT

Controls and Operation ELECTRICAL POWER SUPPLY

A A T726G-030

A Thermostat – Pump Compartment

In the rear pump compartment.

THERMOSTAT – ENGINE COMPARTMENT – LEFT SIDE

T726G-021

A Fire Detection System Fuse

Power is supplied to the fire detection system by one 5A fuse in the fuse and relay panel located in the compartment just below the instrument panel.

A T726G-031

A Thermostat – Engine Compartment – Left Side

Left rear side, in the engine compartment.

THERMOSTAT – ENGINE COMPARTMENT – RIGHT SIDE

A

T726G-032

A Thermostat – Engine Compartment – Right Side

Above the front of the engine, near the starter.

2.25

Controls and Operation

Tigercat T726G Trencher

SYSTEM TEST

A

IMPORTANT! The following test is only to be performed on machines with a fire DETECTION system. If this test is performed on machines with a fire SUPPRESSION system it will activate the extinguishers.

B

DAILY:

D

C

726E-018

A B C D M726E-135

• This message will be displayed on the computer screen if there is a bad connection within the system. Repairs should be made immediately.

Optimal Distance Between the Thermostat and the Heat Source Heat Gun Area of Thermostat to Which Heat should be Applied Thermostat

NOTE: DO NOT USE BUTANE TORCHES or any type of flame tool to heat the test the sensors. The intense heat from a flame tool can damage the sensor.

WEEKLY: • Inspect all parts for damage, rust, corrosion or dirt.

Replace any damaged parts immediately.

• Make sure all components are in place and unobstructed.

• Check fire detection electrical network for cut, frayed, stripped or damaged wires.

• Ensure thermostats are clean.

EVERY MONTH:

M726E-134

• Turn the ignition switch ON and use a heat source (heat gun) to apply heat to each of the thermostats (for approximately 30-40 seconds only) to confirm the warning system light and buzzer operate and the following message displays on the computer screen.

2.26

Tigercat T726G Trencher

Controls and Operation

AVOIDING DAMAGE AND FALSE SIGNALS DURING MACHINE SERVICE B

A T726G-077

T726G-010

C

T726G-032

D E

T726G-030 724G-021

T726G-031 724G-061

A Portable Fire Extinguisher B Alarm Light C Thermostat – Engine Compartment – Right Side

D Thermostat – Pump Compartment E Thermostat – Engine Compartment – Left Side

Pay attention to the location of the components of the fire detection system. Take care not to damage the heat sensors or wiring, this includes hitting, cutting, bending, denting, etc. Damage to heat sensors due to shock could make the system inoperable and/or cause false signals. Cut, pinched, or kinked wiring could make the system inoperable and/or cause false signals.

WARNING Failure to follow these instructions and guidelines may result in serious bodily injury, death, and property damage.

In addition, the thermostats are sensitive to heat from welding torches, steam cleaning or other outside sources which may create a false detection by the system.

If any of the components are damaged, replace them immediately before operating the machine.

FIRE PREVENTION Refer to FIRE PREVENTION in SECTION 1 for fire prevention information/techniques.

2.27

Controls and Operation

Tigercat T726G Trencher

OPERATOR’S SEAT – AIR RIDE

SEAT ADJUSTMENTS HEIGHT ADJUSTMENT

WARNING The seat belt supplied with this seat must be used at all times when operating this machine.

The spring-assisted height adjustment is controlled by the height adjustment lever located on the front left side of the seat chassis. The four height settings – top, bottom and two in-between, provide a total height adjustment of 76 mm (3 in).

To raise the seat height, firmly lift up on the height adjustment lever and partially lift your body weight from the seat. When the seat rises to the desired height, firmly push the lever down into the locking position (a click should be heard).

To lower the seat height, firmly lift up on the height adjustment lever and add body weight to the seat until the seat is at the desired height. Firmly push the lever down into the locking position (a click should be heard).

C

D

RIDE ADJUSTMENT After adjusting height, the ride adjustment should be made by pulling or pushing the air ride control valve knob.

To stiffen the ride, push on the air ride adjustment knob to increase the air pressure in the suspension air bag.

To soften the ride, pull on the air ride adjustment knob to decrease the air pressure in the suspension air bag.

B

LUMBAR HORIZONTAL ADJUSTMENT E A 720E-001

To increase lumbar support pressure, turn lumbar adjustment knob forward. To decrease lumbar support pressure, turn lumbar adjustment knob backwards.

BACK ANGLE ADJUSTMENT Rotate back angle adjustment knob to place seat at the desired angle.

FORE/AFT SLIDE

C

F

Move and hold forward/backward slide lever. Roll seat forward or backward to the desired position relative to the foot pedal controls.

ARMREST ADJUSTMENT Each armrest has two adjustments to place it in the required position. Loosen adjustment locking wing bolts to reposition armrest height and forward/backward position.

332-6

A B C D E F

Height Adjustment Ride Adjustment Lumbar Horizontal Adjustment Back Angle Adjustment Seat Fore/Aft Adjustment Armrest Adjustment

2.28

Tigercat T726G Trencher

Controls and Operation

PROBLEMS AND CORRECTIVE ACTION RIDE IS TOO STIFF/SEAT TENDS TO PUSH OR THROW OPERATOR FORWARD The air ride control valve has over pressurized the seat air suspension. This typically happens because the operator is trying to use the air suspension to adjust the ride height rather than using height adjustment lever to raise the seat.

RIDES TOO SOFT OR BOTTOMS OUT AND PINCHES OPERATOR The air ride control valve has under pressurized the seat air suspension ride adjustment. Insufficient pressure exaggerates the knee-action movement of the seat.

This usually happens because the operator is trying to lower the seat by decreasing the amount of air pressure instead of using the height adjustment lever.

SEAT TOO HIGH/SEAT TOO LOW There are several things which can cause improper seat height. Adjust the seat to the desired position. If the proper height cannot be reached using one of the four height adjustment settings, it may be necessary to install the seat on a higher base.

OPERATOR’S LEGS FALLING ASLEEP The seat is adjusted too high, and the air ride control valve has under pressurized the seat air suspension ride adjustment, resulting in the operator sitting too low into the seat.

2.29

Controls and Operation

Tigercat T726G Trencher

2.30

Tigercat T726G Trencher

Controls and Operation

COMPUTER CONTROL SYSTEM

A

B

C

F

G

H

I

F G H I

F1 Button F2 Button F3 Button F4 Button

E

D

T726G-078

A B C D E

UP Arrow Button OK Button DOWN Arrow Button Menu Button Back Button

The buttons are configured by program software to bring up a display screen, bring up an adjustment group or act as a virtual input.

A

• OK button.

Pushing this button equals 'Enter'. It saves the value or confirms the selection you have made.

• Menu button.

Always brings up the Main menu. It is not programmable.

• BACK button.

T726G-007

A Computer Display

Returns you to the previous display screen. May be configured by program software to bring up a display screen, bring up an adjustment group or act as a virtual input.

The computer and display is the operator interface with the electronic control system. The computer is the central unit in the control system that functions as both a master controller and a display unit.

• F1 – F4 function buttons.

The front of the computer consists of a control panel with a display and nine buttons:

Programmed buttons that are configured by program software to bring up a display screen, bring up an adjustment group or act as an input.

• UP and DOWN arrow buttons.

Navigation buttons that are used to scroll through selections on a menu page.

2.31

Controls and Operation

Tigercat T726G Trencher

COMPUTER NETWORK J A B

C

K H

L

F G

I

E

I

D

N M 726GT-034

A B C D E F G

Computer and Display Speed Direction/Control Joystick Boom Control Joystick XA2-A0 Expansion Module – Cab XA2-A1 Expansion Module – Behind Cab, Right Side Engine Electronic Control Unit (ECU) Electronic Solenoids – Pilot Manifold

H I J K L M N

Electronic Solenoid – Drive Pump Electronic Solenoid – Drive Motor(s) Electronic Solenoid – Attachment Pump USB Port Engine Diagnostic Connection Drive Motor Speed Sensor Drive Pressure Transducer

The computer is part of a network of components.

The computer is the main controller in the system.

The computer program is the operating system for the computer display as well as the control system for the machine operating parameters.

The engine ECU provides electronic information to the computer via the J1939 CAN BUS link. This information is displayed on the computer display.

NOTE: The computer is software-based. This software may be updated after the machine is in service as part of on-going product improvement programs and service newsletters. The information contained in this manual is accurate at the time of printing. Improvements to the machine and/or software are on-going and may not be covered. In these cases contact your Tigercat dealer for appropriate information.

A

M726E-123

B

700233

A XA2-A0 Expansion Module – Cab B XA2-A1 Expansion Module – Behind Cab, Right Side

2.32

Tigercat T726G Trencher

Controls and Operation

COMPUTER DISPLAY MAIN SCREEN A

B

D

C

E

F

G 6

H 6

N I O

J

P

Q

K

L

R

S A B C D E F G H I J K

M

T

U

Interlock System – ON/OFF Parking Brake – ON/OFF Water Spray – ON/OFF/AUTO Drum – FORWARD/OFF/REVERSE Attachment Side Plates – LEFT/RIGHT/BOTH Hydraulic Oil Return Filter Bypass * Speed Direction – FORWARD/NEUTRAL/REVERSE Hazard Light Indicator Drum Pressure Gauge Engine Speed – rpm Engine Coolant Temperature Gauge ***

L M N O P Q R S T U V

V

Lights – LEFT/RIGHT/TURN SIGNALS Travel Speed – MPH or km/h (When Trenching – FPM or m/min) Fuel Level Gauge ** DEF Fluid Level Indicator Hydraulic Oil Temperature Gauge *** ECO Mode – ON Indicator Hydraulic Oil Grade Engine Menu – Press F1 to Select Adjustment Menu – Press F2 to Select Information Menu – Press F3 to Select Alarm Indicators – Press F4 to Select

* HYDRAULIC OIL RETURN FILTER BYPASS

** FUEL LEVEL GAUGE SYMBOL

GREY – Hydraulic oil is not bypassing return filters.

YELLOW– Fuel level is low.

YELLOW– Hydraulic oil is below operating temperature and is bypassing return filters. Allow hydraulic oil to warm to operating temperature.

*** TEMPERATURE GAUGE SYMBOL

RED – Hydraulic oil is at operating temperature and is bypassing return filters. STOP the machine and change the return filters immediately.

Refer to FILTERS– HYDRAULIC OIL RETURN in SECTION 3 for more information.

BLUE – Temperature range is LOW. WHITE – Temperature range is NORMAL. RED – Temperature range is HIGH. IMPORTANT! To prevent damage to the machine, do not run the attachment circuit or work the machine hard when the hydraulic oil temperature gauge symbol is BLUE. 2.33

Controls and Operation

Tigercat T726G Trencher

ENGINE MENU

700500 700498

The engine functions displayed are:

Press the F1 button from the main screen to view the Engine menu.

Charge Air Temperature – °C or °F Engine Coolant Temperature – °C or °F Engine Oil Temperature – °C or °F Fuel Temperature – °C or °F Engine Speed – rpm Turbocharger Boost Pressure – bar or psi Engine Oil Pressure – bar or psi Engine Load – % Engine Hours – h Voltage – V Fuel Rate – L/h or US gph (instantaneous) Press the F1 button to toggle ECO MODE ON and OFF. Press the F2 button to toggle between metric and Imperial units of measure.

Press the F3 button to select the fuel information display.

Press the back button to return to the main screen.

2.34

Tigercat T726G Trencher

Controls and Operation ENGINE OIL TEMPERATURE

CHARGE AIR TEMPERATURE

This display indicates the current engine oil temperature.

This display indicates the charge air cooler temperature reading.

If temperature rises above the recommended temperature, alarm will sound, check the following:

If temperature rises above the recommended temperature, alarm will sound, check the following:

• Plugged cooler package air intake screens in doors and access panels.

• Plugged cooler package air intake screens in doors access panel.

• Plugged radiator.

• Plugged charge air cooler.

Do not continue to operate machine.

Do not continue to operate the machine.

Refer to CLEANING COOLER PACKAGE in SECTION 3 and COMPUTER – MESSAGES in THIS SECTION.

Refer to CLEANING COOLER PACKAGE in SECTION 3 and COMPUTER – MESSAGES in THIS SECTION.

FUEL TEMPERATURE

ENGINE COOLANT TEMPERATURE °F

This display indicates the fuel temperature.

This display indicates the current engine coolant temperature.

ENGINE SPEED

If temperature rises above the recommended temperature, alarm will sound, check the following:

This display indicates engine speed in rpm.

MAINTAINING CORRECT ENGINE RPM

• Plugged cooler package air intake screens in doors and access panels.

It is important that engine speeds be correct at all times:

• Plugged oil cooler.

C87 Tigercat by FPT Engine LOW: 900 rpm (No Load) HIGH: 1850 rpm (No Load)

Do not continue to operate machine.

Refer to CLEANING COOLER PACKAGE in SECTION 3 and COMPUTER – MESSAGES in THIS SECTION. A

B

NOTE: The above values are measured with the hydraulic and engine oil at normal operating temperatures and no functions activated.

C

Engine speed defaults to 900 rpm when the engine is started.

A Engine Temperature Low B Engine Temperature Normal C Engine Temperature High

NOTE: Coolant temperature can also be monitored using the engine coolant temperature gauge shown on the main screen. The changes in gauge symbol colour indicate temperature range (BLUE=low, WHITE=normal, RED=high).

NOTE: Engine speed can also be monitored using the engine tachometer gauge shown on the main screen.

2.35

Controls and Operation

Tigercat T726G Trencher TURBOCHARGER BOOST PRESSURE This display indicates air intake manifold boost pressure. This reading is an absolute value and includes atmospheric pressure.

ENGINE OIL PRESSURE This display indicates engine oil pressure.

If oil pressure falls too low, an alarm will sound.

Refer to COMPUTER – MESSAGES in THIS SECTION. ENGINE LOAD

700500

This display indicates the percentage of maximum engine load currently in use.

ENGINE HOURS This display indicates the total number of hours the engine has run.

VOLTAGE

IMPORTANT! 24 VOLT ELECTRICAL SYSTEM This display indicates engine voltage levels.

Normal operating range for the electrical system is between 20 and 30 volts.

If the engine voltage goes outside the normal range, an alarm will sound. Refer to COMPUTER – MESSAGES in THIS SECTION. A reading in excess of 30 volts indicates a possible faulty voltage regulator.

A reading less than 20 volts indicates a possible faulty battery or alternator.

FUEL RATE (INSTANTANEOUS) This display indicates the current rate of fuel consumption.

2.36

Tigercat T726G Trencher

Controls and Operation

ECO MODE FUNCTION

FUEL INFORMATION FUNCTIONS

700534

700499

Press the F2 button to toggle between metric and Imperial ( ) units of measure

Press the F1 button to toggle ECO MODE ON and OFF. Press the back button to return to the main screen.

Press the F3 button to reset ( ) the trip fuel used and trip average fuel rate functions.

TOTAL FUEL INFORMATION This display indicates the total fuel used during the life of the machine: Total fuel used – L or US gal, Total hours – h, Total fuel rate – L/h or US gph.

TRIP FUEL INFORMATION 700535

When ECO MODE is ON the icon is illuminated green and will also be shown on the main screen. Placing the engine in ECO MODE adjusts engine settings for higher fuel efficiency with a corresponding reduction in available engine horsepower.

This display indicates the average fuel consumption rate for the machine since last reset: Trip fuel used – L or US gal, Trip hours – h, Trip fuel rate – L/h or US gph.

FUEL GAUGE The fuel level gauge is shown on the main screen.

NOTE: A yellow fuel symbol indicates fuel level low.

Press the back button to return to the Engine menu.

Press the back button again to return to the main screen.

2.37

Controls and Operation

Tigercat T726G Trencher

ADJUSTMENT MENU

700501 700498

The current General Settings displayed are:

Press F2 button from the main screen to view the General Settings.

Hydraulic Oil Grade Fan Clean Frequency – minutes Drum Speed – percentage; Attachment Selected – Manual Shift or Hydraulic Shift Drive Limiter – ON/OFF Rear Door Reverse Lights – ON/OFF/AUTO (BACK-UP) Press the F1 button (Adjust) to view the General Settings menu to make changes to these settings.

2.38

Tigercat T726G Trencher

Controls and Operation HYDRAULIC OIL GRADE SELECTION

700502

700502

The selections available are: • (Hydraulic) Oil Grade Selection • Fan Clean Frequency – 1 to 20 minutes

Press the UP or DOWN arrow buttons to select Oil Grade Selection.

• Fan Clean Duration – 10 to 30 seconds

Press the OK button to make adjustments.

• Drive Limiter – ON/OFF

700503

• Rear Door Lights – ON/OFF/AUTO (BACK-UP) • Wheel/Tire – Size • Attachment Selection (Drum Side Plates) – Manual Shift or Hydraulic Shift • Drum Speed – Forward 5 to 100% • Drum Speed – Reverse -5 to -25% • Cutting FWD Speed % • Cutting REV Speed % Press the UP or DOWN arrow buttons to scroll to the desired selection.

Press the OK button to make the selection.

Press the UP or DOWN arrow buttons to select the desired hydraulic oil grade.

NOTE: Press the back button at any time to return from the General Settings menu to the General Settings screen.

Press the back button again to return to the main screen.

Press the OK button to confirm the selection. The screen will automatically return to the General Settings menu.

2.39

Controls and Operation

Tigercat T726G Trencher

FAN CLEAN FREQUENCY

FAN CLEAN DURATION 700504

700506

Press the UP or DOWN arrow buttons to select Fan Clean Frequency.

Press the UP or DOWN arrow buttons to select Fan Clean Duration.

Press the OK button to make adjustments.

Press the OK button to make adjustments.

700505

700507

The setting value can be adjusted between 1 minute and 20 minutes. This is the setting for auto reverse of the cooling fan to go into the clean mode (reverse/clean).

The factory default setting is every 10 minutes.

The setting value can be adjusted between 10 seconds and 30 seconds. This is the time the cooling fan remains in the clean (reverse/clean) mode. The factory default is 10 seconds.

Press the UP or DOWN arrow buttons to select the desired value.

Press the UP or DOWN arrow buttons to select the desired value.

Press the OK button to set the value. The screen will automatically return to the General Settings menu.

Press the OK button to set the value. The screen will automatically return to the General Settings menu.

2.40

Tigercat T726G Trencher

Controls and Operation

DRIVE LIMITER

DRIVE LIMITER OPERATION Selecting Drive Limiter ON or OFF has no effect when the drum switch is in the OFF position.

700508

Selecting the ON position when the drum switch is also in the ON position activates the drive limiting system.

This system detects a decrease in engine speed and automatically limits power to machine drive functions in order to prevent engine stalling and diverts maximum engine horsepower to the attachment.

This function is intended to aid the operator in maintaining optimum cutting operations for maximum productivity.

It is important not to stop or stall the engine with the trenching head rotor rotating. Serious component damage may result. Always stop the trenching head rotor with engine speed set at LOW.

Press the UP or DOWN arrow buttons to select Drive Limiter State.

Press the OK button to make adjustments.

700509

A

700501

A Drive Limiter Icon – General Screen

When the drive limiter is actively limiting drive power, the drive limiter icon on the General Settings screen will illuminate YELLOW.

Press the UP or DOWN arrow buttons to select OFF or ON. Drive Limiter ON = Activates Drive Limiter Drive Limiter OFF = Deactivates Drive Limiter NOTE: See DRIVE LIMITER OPERATION for more details.

Press the OK button to set the selection. The screen will automatically return to the General Settings menu.

Press the back button to return to the Adjustment Menu.

Press the back button again to return to the main screen.

2.41

Controls and Operation

Tigercat T726G Trencher

REAR DOOR LIGHTS 700510

A 700501

A Door Lights Icon – General Screen

Press the UP or DOWN arrow buttons to select Rear Door Lights.

Press the OK button to make adjustments.

When the rear door lights are set to ON or AUTO, the door lights icon on the General Settings screen will illuminate YELLOW.

700511

Three settings are available: • OFF– Rear door lights do not function.

• ON– Rear door lights function when the work lights switch is turned ON. • AUTO (BACK-UP)– Rear door lights function as back-up lights only when the machine is placed in reverse.

Press the UP or DOWN arrow buttons to select the desired value.

Press the OK button to set the value. The screen will automatically return to the General Settings menu.

2.42

Tigercat T726G Trencher

Controls and Operation

WHEEL/TIRE

ATTACHMENT SELECTION 700512

700514

Press the UP or DOWN arrow buttons to select Wheel/ Tire.

Press the UP or DOWN arrow buttons to select Attachment Selection.

Press the OK button to make adjustments.

Press the OK button to make adjustments.

700515

700513

The available tire sizes are listed.

Two settings are available:

IMPORTANT! Travel speed sensors are calibrated to tire size. Do not change tire size to a size that is not listed without contacting Tigercat Service. Additional programming will be required to accommodate different tire sizes.

Press the UP or DOWN arrow buttons to select the desired value.

Press the OK button to set the value. The screen will automatically return to the General Settings menu.

• Manual Shift – Side plates can only be shifted physically.

• Hydraulic Shift – Side plates can be shifted by joystick controls (if equipped). Refer to JOYSTICKS– RIGHT, BOOM CONTROLS in THIS SECTION. Press the UP or DOWN arrow buttons to select the desired value.

Press the OK button to set the value. The screen will automatically return to the General Settings menu.

2.43

Controls and Operation

Tigercat T726G Trencher

DRUM SPEED – FORWARD

DRUM SPEED – REVERSE 700516

700518

Press the UP or DOWN arrow buttons to select Drum Speed–Forward.

Press the UP or DOWN arrow buttons to select Drum Speed – Reverse.

Press the OK button to make adjustments.

Press the OK button to make adjustments.

700517

700519

The setting value can be adjusted between 5.00 percent and 100.00 percent. This is the setting for the forward drum speed as a percentage of maximum speed. The factory default setting is 100.00 percent.

The setting value can be adjusted between –25.00 percent and –5.00 percent. This is the setting for the reverse drum speed as a percentage of maximum speed.

The factory default setting is –25.00 percent.

Press the UP or DOWN arrow buttons to select the desired value.

Press the UP or DOWN arrow buttons to select the desired value.

Press the OK button to set the value. The screen will automatically return to the General Settings menu.

Press the OK button to set the value. The screen will automatically return to the General Settings menu.

2.44

Tigercat T726G Trencher

Controls and Operation

CUTTER FORWARD TRAVEL SPEED

CUTTER REVERSE TRAVEL SPEED 700520

700522

Press the UP or DOWN arrow buttons to select Cutting FWD Speed %.

Press the UP or DOWN arrow buttons to select Cutting REV Speed %.

Press the OK button to make adjustments.

Press the OK button to make adjustments.

700521

700523

The setting value can be adjusted between 5.00 percent and 40.00 percent. This is the setting for the forward travel speed when the cutter is operating as a percentage of the set travel speed. The factory default setting is 20.00 percent.

The setting value can be adjusted between –40.00 percent and –5.00 percent. This is the setting for the reverse travel speed when the cutter is operating as a percentage of the set travel speed. The factory default setting is –20.00 percent.

Press the UP or DOWN arrow buttons to select the desired value.

Press the UP or DOWN arrow buttons to select the desired value.

Press the OK button to set the value. The screen will automatically return to the General Settings menu.

Press the OK button to set the value. The screen will automatically return to the General Settings menu.

2.45

Controls and Operation

Tigercat T726G Trencher

INFORMATION MENU

700524 700498

Press the F3 button from the main screen to access the Information menu.

When selected, the information functions displayed are: Machine Voltage – V This display indicates machine voltage readings which are voltage levels in the electrical control system.

Drum Pressure – bar or psi This display indicates drum pressure.

Transmission Motor Speed – rpm This display indicates transmission motor speed.

Serial Number This display indicates machine serial number.

F

R

Drive Pressure – bar or psi

This display indicates drive pressure – Forward and Reverse.

Machine Hours – h This display indicates the total number of hours the machine has run.

Pump Drive Gearbox Oil Temperature – °C or °F This display indicates the current pump drive gearbox oil temperature.

2.46

Tigercat T726G Trencher

Controls and Operation

Hydraulic Oil Temperature – °C or °F This display indicates the current hydraulic oil temperature registered in the hydraulic oil tank.

If the temperature rises above the recommended operating range for the type of hydraulic oil in use, alarm will sound, check the following: • Plugged oil cooler • Malfunction in a hydraulic circuit • High loads on the hydraulic system • Malfunction of the cooling fan A

• Low hydraulic oil level • Correct Hydraulic Oil Grade Selection If hydraulic oil temperature rises above the recommended operating range Do not continue to operate the machine.

NOTE: The hydraulic oil temperature can also be monitored using the hydraulic oil temperature gauge shown on the main screen. The gauge symbol colour changes indicate the temperature range (BLUE=low, WHITE=normal, RED=high).

The alarm must not be used to monitor the hydraulic oil. The operator must use the hydraulic oil temperature gauge on the computer display main screen, together with the HYDRAULIC OIL OPERATING RANGE CHART in SECTION 3 to prevent damage to the hydraulic system.

700498

A Hydraulic Oil Grade – Main Screen

Hydraulic oil grade information is shown on the main screen below the hydraulic oil temperature gauge.

Operating outside the recommended operating range will shorten hydraulic component life.

Refer to COMPUTER – ADJUSTMENT MENU – HYDRAULIC OIL GRADE SELECTION in THIS SECTION for hydraulic oil grade selection settings information.

Refer to APPROVED HYDRAULIC OILS in SECTION 3 for hydraulic oil operating range information.

Refer also to COMPUTER – MESSAGES– CRITICAL – HYDRAULIC OIL TEMPERATURE HIGH in THIS SECTION for more information about the hydraulic oil temperature message.

2.47

Controls and Operation

Tigercat T726G Trencher

CUTTER FUNCTIONS

700526 700525

Press the F1 button to select the Cutter Functions display.

The following information will be displayed: Drum Pressure Gauge – bar or psi Engine Speed – rpm Drum Speed – %

Press the F1 button to set the Attachment Drum Speed.

The Drum Speed value can be set from 5% to 100%.

This value is a percentage of maximum drum speed when the attachment is activated.

Press the UP or DOWN arrow buttons to select the desired value. Press the OK button to set the value.

Press the back button to return to the Cutter Functions display.

Press the back button again to return to the main screen.

Hydraulic Oil Temperature – °C or °F Engine Coolant Temperature – °C or °F

2.48

Tigercat T726G Trencher

Controls and Operation

UNITS OF MEASURE

Press the F2 button to toggle between metric and Imperial units of measure.

Press the back button to return to the main screen.

2.49

Controls and Operation

Tigercat T726G Trencher

MAIN MENU

700537

Press the menu button the Main menu.

from the main screen to view 724G-115

The following selections are displayed: • Adjust – Press F1 • Measure – Press F2 • Preferences – Press F3 • Info– Press F4 Press the back button to return to the main screen.

2.50

Tigercat T726G Trencher

Controls and Operation

MEASURE MENU

700528 724G-115

The following menu items can be selected.

• Cutter Control

Press the F2 button to access the Measure menu.

• Engine/Emissions J1939 Inputs • Fan Control • Fault Management • Fuel Economy • Telematics • Inputs • Outputs This menu is used by Tigercat service technicians. Refer to SECTION 6 of the SERVICE MANUAL for more information.

Press the UP or DOWN arrow buttons to select the menu item.

Press the OK button to view the information from the menu item.

Press the back button to return to the Measure menu or press the F1 button to return to the Main menu.

Press the back button again to return to the main screen.

2.51

Controls and Operation

Tigercat T726G Trencher

PREFERENCES MENU

DISPLAY ADJUSTMENT 2000101

724G-115

Press the F3 button from the Main menu to view the Preferences menu.

2000100

Press the F1 button from the Preferences menu to display the Display adjustment screen with the following selections: • Return to Main menu – Press F1 • Backlight – Press F2 • Screen saver – Press F3 BACKLIGHT ADJUSTMENT 2000102

The Preferences menu displays the following selections: • Display – Press F1 • Date/Time – Press F2 • Language – Press F3 Press the F2 button to select the Backlight adjustment.

The range is 10 – 100. The default setting is 100. The lower the number, the longer the life of the display unit.

Press the UP or DOWN arrow buttons to select the desired value.

Press the OK button to set the value.

2.52

Tigercat T726G Trencher

Controls and Operation DATE/TIME ADJUSTMENT

SCREEN SAVER ADJUSTMENT 2000103

2000105

Press the F3 button to view the Screen saver adjustment screen.

2000104

Press the F2 button from the Preferences menu to display the Date/Time adjustment screen with the following selections: • Date – Press F1 • Time – Press F2

Press the UP and DOWN arrow buttons to scroll through the choices: • Screen Saver Off, Dimmed or Black • Dimmed • Timeout: 5 – 600 seconds • Dimmed light: 0 – 60 seconds • Black – Timeout 5 – 600 seconds Press the UP or DOWN buttons to make a selection.

Press the OK button to make the selection and go to the next selection.

Press the back button to return to the Preferences menu.

2.53

Controls and Operation

Tigercat T726G Trencher

DATE ADJUSTMENT

2000108 2000106

Press the F1 button from the Date/Time Adjustment screen to set the date. Year is automatically highlighted.

Press the UP or DOWN arrow buttons to select the year.

When the month has been confirmed the day is highlighted.

Press the UP or DOWN arrow buttons to select the day.

Press the OK button to confirm day selected.

Press the OK button to confirm year selected.

2000105 2000107

When the year has been confirmed the month is highlighted.

Press the UP or DOWN arrow buttons to select the month.

The display will return to the Date/Time adjustment screen.

Press the F2 button from the Date/Time Adjustment screen to set the time.

Press the OK button to confirm month selected.

2.54

Tigercat T726G Trencher

Controls and Operation

TIME ADJUSTMENT

LANGUAGE ADJUSTMENT 2000137

2000109

Hour is automatically highlighted.

Press the UP or DOWN arrow buttons to select the hour.

Press the OK button to confirm hour selected.

Press the F3 button from the Preferences menu to view Language selection screen. The languages available for selection will be shown.

Press the UP or DOWN arrow buttons to select the language.

2000110

Press the OK button to confirm language selected. The display will return to the Preferences menu.

Press the back button to return to the Main menu.

Press the back button again to return to the main screen.

When the hour has been confirmed the minute is highlighted.

Press the UP or DOWN arrow buttons to select the minute.

Press the OK button to confirm minute selected. The display will return to the Date/Time menu.

Press the back button to return to the Preferences menu.

2.55

Controls and Operation

Tigercat T726G Trencher

INFO MENU

MODULES 700530

724G-115

Press the F4 button from the Main menu to view the Info menu.

700529

Press the F1 button from the Info menu to select the Modules menu. This menu provides information on the following machine modules: • Display • XA2-A0-Module 1 – Cab • XA2-A1-Module 2 – Rear Chassis • FPT Engine Press the UP or DOWN arrow buttons to select a module. Press the OK button to view the selection.

700531

The Info menu displays the following selections: • Modules – Press F1 • Logs – Press F3 The machine ID information is also displayed on the screen.

Specific information for the computer is displayed on the screen.

This menu is used by Tigercat service technicians.

Refer to SECTION 6 of the SERVICE MANUAL for more information.

2.56

Tigercat T726G Trencher

Controls and Operation

LOGS

700533 700532

Press the F3 button from the Info menu to select the Logs menu.

This menu lists System Logs and Fault Logs and the number of records within each log. The records are a list of all the fault occurrences in each log.

Press the UP or DOWN arrow buttons to select the log.

Press the OK button to view the events of the log.

Press the UP or DOWN arrow buttons to scroll through the list of events.

The events are a list of all the fault occurrences in each log. Events cannot be cleared by operators.

This menu is used by Tigercat service technicians. Refer to SECTION 6 of the SERVICE MANUAL for more information.

Press the back button to return to the Logs menu or press the F1 button to return to the Main menu.

Press the back button again to return to the main screen.

2.57

Controls and Operation

Tigercat T726G Trencher

MESSAGES, COMPUTER The computer displays messages and activates the master alarm and alarm light when a system fault occurs.

NOTE: The computer control system will automatically perform a test at engine start up to verify that master alarm and alarm light are functioning. Refer to STARTING ENGINE in THIS SECTION. There are different types of messages and alarms. They appear on the screen as a block message.

The types of messages are: • CRITICAL MESSAGE – RED header • ERROR MESSAGE – RED header • ALERT MESSAGE – YELLOW header Messages can be hidden or acknowledged by pressing the F2 button (Hide or OK).

All messages that have been hidden or acknowledged are stored in the computer.

In some instances it will be necessary to immediately stop the machine, turn OFF the engine and repair the problem causing the message.

Active fault messages that have been hidden can be reviewed by pressing the F4 button. Recalled messages will be displayed in order starting with the highest priority first.

2.58

Tigercat T726G Trencher

Controls and Operation

CRITICAL MESSAGES (RED) Critical messages advise the operator that a critical machine fault is about to occur or a system fault has occurred.

Critical messages have the highest level of priority and are used to alert operator that immediate action must be taken to prevent damage to machine or to ensure operator safety.

When a critical message is displayed, the master alarm and alarm light will sound and flash continuously. The message remains on the screen until the operator hides it.

A list of CRITICAL MESSAGES is as follows: • Hydraulic Oil Level Low

The message will give brief details of the fault and advise what action is necessary.

• Hydraulic Oil Temperature High • Engine Oil Pressure Low

In some instances the machine requires immediate action to correct the problem which requires the operator to STOP machine operation, turn OFF the engine and service the machine to correct the problem.

• Engine Oil Pressure Low – Engine Derate • Engine Oil Temperature High • Engine Fault Code Messages – Critical

However, if the machine cannot be stopped immediately for safety reasons, the operator can hide the message.

In this instance the machine should only be operated long enough to make the machine safe, then STOP machine operation and turn OFF the engine before serious machine damage can occur!

• Engine Coolant Temperature High • Engine Coolant Temperature High – Engine Derate • Engine Coolant Level Low • Hydraulic Oil Return Filters Bypassed • Fire Detected

Messages can be hidden by pressing the F2 button (Hide).

• Hardware Fault – MD3 (Computer) • Hardware Fault – XA2-A0

Critical messages flash the critical symbol above the F4 button when active messages are hidden. The symbol will continue to flash until the problem is resolved and the fault becomes inactive.

• Hardware Fault – XA2-A1 • Hardware Fault – Engine • Aftertreatment System Technical Failure *

Active messages that have been hidden can be reviewed by pressing the F4 button.

• Diesel Exhaust Fluid Quality * • Engine Restarts Remaining Until Engine Lockout * • Engine Locked Out * • Aftertreatment System Engine Idle Too Long * * NOTE: The aftertreatment system and its related components are applicable to Tier 4f machines only.

2.59

Controls and Operation HYDRAULIC OIL LEVEL LOW

Tigercat T726G Trencher HYDRAULIC OIL TEMPERATURE HIGH

Hydraulic Oil

Hydraulic Oil

Level Low.

Temperature High.

This message will be displayed, alarm light will flash and alarm will sound when the main hydraulic oil tank level is low.

Stop the engine immediately when this alarm is activated. Operating machine with a low hydraulic oil level can cause hydraulic pumps to fail.

When this alarm is activated stop the engine and look for signs of broken hoses or other leaks. Repair leaks and refill the main hydraulic oil tank to FULL mark on the sight gauge. Restart engine and inspect for leaks.

This message will be displayed, alarm light will flash and alarm will sound when the oil temperature exceeds the recommended operating range for the type of hydraulic oil in use.

If the temperature rises above the recommended operating range for the type of hydraulic oil in use check the following: • Plugged cooler package air intake screens in doors and access panels • Malfunction in a hydraulic system • High loads on the hydraulic system • Malfunction of the cooling fan • Low hydraulic oil level • Correct Hydraulic Oil Grade Selection If hydraulic oil temperature rises above the recommended operating range, do not continue to operate the machine.

This alarm must not be used to monitor the hydraulic oil. The operator must use the hydraulic oil temperature gauge on the main screen, together with the operating range chart in SECTION 3 to prevent damage to the hydraulic system.

Hydraulic oil grade information is shown on the main screen below the hydraulic oil temperature gauge.

Operating outside the recommended operating range shortens hydraulic component life.

Refer to COMPUTER – ADJUSTMENT MENU – HYDRAULIC OIL GRADE SELECTION in THIS SECTION for hydraulic oil grade selection settings information.

Refer to APPROVED HYDRAULIC OILS in SECTION 3 for hydraulic oil operating range information.

2.60

Tigercat T726G Trencher

Controls and Operation

HYDRAULIC OIL RETURN FILTERS BYPASSED

PUMP GEARBOX TEMPERATURE HIGH

Pump Gearbox Temperature

Return Oil Filters

Temperature High.

Bypassed. Slowly warm up machine or service if already warm.

This message will be displayed, alarm light will flash and alarm will sound to inform the operator the pump gearbox temperature is high.

This message will be displayed, alarm light will flash and alarm will sound to inform the operator the hydraulic oil is bypassing the return filters.

This message may appear if the machine is cold. If the machine has already been warmed up, then the machine should be service immediately.

Stop the machine immediately when this alarm is activated and check the gearbox for proper operation.

NOTE: When hydraulic oil is at operating temperature, the hydraulic oil filter bypass icon will be illuminated RED. When the hydraulic oil temperature is low the icon will be illuminated YELLOW. Refer to FILTERS– HYDRAULIC OIL RETURN in SECTION 3 for more information.

T726G-105

A

A Hydraulic Oil Filter Bypass Icon

2.61

Controls and Operation FIRE DETECTED

Tigercat T726G Trencher ENGINE FAULT CODE MESSAGES – CRITICAL

Fire Detection System

SPN: XXXXX 1 of 1

Fire Detected. When safe to do so, shutdown engine and exit cab.

Contact dealer.

This message will be displayed, alarm light will flash and alarm will sound to inform the operator the fire detection system has detected a fire.

Refer to FIRE DETECTION SYSTEM in THIS SECTION for more information.

Refer also to WHAT TO DO IN CASE OF A MACHINE FIRE and WHAT TO DO AFTER A FIRE in SECTION 1.

Critical engine fault message(s) will be displayed, alarm light will flash and alarm will sound when a critical engine fault message is received from the engine electronic control module.

They provide the SPN code (suspect parameter number) as well as a message describing the fault (when available).

Critical engine fault codes are higher priority messages than alert level engine fault code messages. Critical messages can be hidden but immediate action must be taken, STOP machine operation and service engine immediately to resolve the cause of the fault.

NOTE: Some less common engine fault codes will appear without a message describing the fault. Make a note of the SPN code and contact service for more information.

Refer to ENGINE OPERATION AND MAINTENANCE MANUAL for specific information regarding the engine and aftertreatment system.

NOTE: The aftertreatment system and its related components are applicable to Tier 4f machines only.

NOTE: Contact your Tigercat dealer to obtain an Engine Fault Codes chart. An up to date copy should be kept in the manual box (in the cab). The chart is updated regularly by the engine manufacturer, so it is important to check periodically with the Tigercat dealer to ensure that you have a current copy of the Engine Fault Codes chart.

2.62

Tigercat T726G Trencher

Controls and Operation

ENGINE OIL PRESSURE LOW

ENGINE OIL PRESSURE LOW – ENGINE DERATE

SPN: 9939 1 of 1

Engine Oil

Engine Oil Pressure Low.

Low Pressure - Engine Derate

This message will be displayed, alarm light will flash and alarm will sound when engine oil pressure falls below 0.7 bar (10 psi ).

Turn OFF the engine when this alarm is activated.

Check engine oil levels.

Refer to STARTING ENGINE in THIS SECTION for more information.

This message will be displayed, alarm light will flash and alarm will sound when and engine derate is triggered due to low engine oil pressure. This message may be accompanied by Engine Fault Code Messages related to engine oil pressure.

This message results in the following derate sequence: When engine oil pressure readings fall below 1.2 bar (17 psi) for more than 5 seconds this message will be shown and the engine will immediately begin to derate at 50 rpm/s to a set creep speed allowing the operator to safely stop the machine. Do not continue to operate machine.

Safely stop the machine and turn the engine OFF. Refer to COMPUTER– MESSAGES– CRITICAL – ENGINE OIL PRESSURE LOW in THIS SECTION for recommended corrective action. If the problem continues contact dealer for service.

When engine oil pressure readings rise above 1.4 bar (20 psi) for more than 5 seconds this message will be turned off and the engine will automatically ramp up engine speed at 50 rpm/s to full operating speed.

NOTE: An ENGINE TORQUE DERATE ACTIVE message will also be triggered as the engine begins to derate. Refer to COMPUTER – MESSAGES– ALERT– ENGINE TORQUE DERATE ACTIVE.

2.63

Controls and Operation ENGINE OIL TEMPERATURE HIGH

Tigercat T726G Trencher ENGINE COOLANT LEVEL LOW

SPN: 7123 1 of 1

Engine Coolant

Engine oil temperature high.

Level Low.

This message will be displayed, alarm light will flash and alarm will sound when engine oil temperature exceeds recommended engine temperature.

Check the cooler package and fan for proper operation and run a clean cycle if the machine is equipped with a variable pitch fan. It is also important to manually clean debris from the machine on a regular basis to maintain low machine operating temperatures. Refer to CLEANING COOLER PACKAGE in SECTION 3 Refer to ENGINE OPERATION AND MAINTENANCE MANUAL for code information.

This message will be displayed, alarm light will flash and alarm will sound when the coolant level drops below a safe operating level. The sensor is located in the surge tank.

If this light comes on when the engine is running, stop the engine immediately and correct the fault. With engine running, top up radiator using correct solution of coolant antifreeze.

Refer to SERVICE AND LUBRICATION POINTS CHART in SECTION 3.

WARNING

Do not remove the radiator fill cap when the engine is hot, release of pressurized coolant can cause serious burns.

Turn the engine off. Only remove the radiator fill cap when cool enough to touch with bare hands.

Slowly loosen the cap to the first stop to relieve pressure before removing completely.

2.64

Tigercat T726G Trencher

Controls and Operation

ENGINE COOLANT TEMPERATURE HIGH

ENGINE COOLANT TEMPERATURE HIGH – ENGINE DERATE

Engine Coolant

Engine Coolant

Temperature High.

Temperature High - Engine Derate

This message will be displayed, alarm light will flash and alarm will sound when an engine derate is triggered due to high engine coolant temperature. This message may be accompanied by Engine Fault Code Messages related to coolant temperature.

SPN: 63011 1 of 1 Engine coolant temperature high.

This message results in the following derate sequence: • When coolant temperature rises to 225°F (107°C) for more than 5 seconds the critical symbol will flash.

• When coolant temperature rises to 230°F (110°C) for more than 5 seconds this message will be shown and the engine will immediately begin to derate at 50 rpm/s to a set creep speed allowing the operator to safely stop the machine. Do not continue to operate machine.

This message will be displayed, alarm light will flash and alarm will sound when engine temperature exceeds recommended engine temperature.

When this alarm is activated check for: • Plugged cooler package air intake screens in doors and access panels.

Safely stop the machine, set engine speed at LOW and turn the A/C off. If the engine coolant temperature reading does not return to normal operating levels turn the engine OFF and perform further cooling system checks. Refer also to COMPUTER – MESSAGES – CRITICAL – ENGINE TEMPERATURE HIGH in THIS SECTION for recommended corrective action. If engine coolant temperature does not return to normal operating levels contact dealer for service.

• Plugged radiator.

• Malfunction of the cooling fan Refer to CLEANING COOLER PACKAGE in SECTION 3.

WARNING

• When coolant temperatures fall below 223°F (106°C) for more than 5 seconds this message will be turned off and the engine will automatically ramp up engine speed at 50 rpm/s to full operating speed.

Do not remove the radiator cap when the engine is hot, release of pressurized coolant can cause serious burns.

NOTE: An ENGINE TORQUE DERATE ACTIVE message will also be triggered as the engine begins to derate. Refer to COMPUTER – MESSAGES– ALERT– ENGINE TORQUE DERATE ACTIVE.

Turn OFF the engine. Only remove the coolant fill cap when it is cool enough to touch with bare hands.

Slowly loosen cap to first stop to relieve pressure before removing completely.

2.65

Controls and Operation HARDWARE FAULT – MD3 (COMPUTER)

Tigercat T726G Trencher HARDWARE FAULT – XA2-A0

Hardware Fault – MD3

Hardware Fault – XA2-A0

Active fault has been hidden. Turn key off and on to recall active hidden hardware faults.

Active fault has been hidden. Turn key off and on to recall active hidden hardware faults.

This message will be displayed, alarm light will flash and alarm will sound when a critical active hardware fault related to the computer display has been hidden.

To recall the original active fault(s) the operator must turn the ignition key switch OFF and ON. A VREF error is an example of the type of hardware fault which will be the original active fault which triggers this message.

This message will be displayed, alarm light will flash and alarm will sound when a critical active hardware fault related to the XA2-A0 expansion module has been hidden.

To recall the original active fault(s) the operator must turn the ignition key switch OFF and ON. A VREF and no contact errors are examples of the type of hardware fault which may be the original active fault which triggers this message.

2.66

Tigercat T726G Trencher HARDWARE FAULT – XA2-A1

Controls and Operation HARDWARE FAULT – ENGINE

Hardware Fault – Engine

Hardware Fault – XA2-A1

Active fault has been hidden. Turn key off and on to recall active hidden hardware faults.

Active fault has been hidden. Turn key off and on to recall active hidden hardware faults.

This message will be displayed, alarm light will flash and alarm will sound when a critical active hardware fault related to the XA2-A1 expansion module has been hidden.

To recall the original active fault(s) the operator must turn the ignition key switch OFF and ON. A VREF and no contact errors are examples of the type of hardware fault which may be the original active fault which triggers this message.

This message will be displayed, alarm light will flash and alarm will sound when a critical active hardware fault related to the Engine has been hidden.

To recall the original active fault(s) the operator must turn the ignition key switch OFF and ON. No contact error is an example of the type of hardware fault which may be the original active fault which triggers this message.

2.67

Controls and Operation THE AFTERTREATMENT SYSTEM AND ITS RELATED COMPONENTS ARE APPLICABLE TO TIER 4F MACHINES ONLY.

AFTERTREATMENT SYSTEM TECHNICAL FAILURE

Aftertreatment System Technical failure severe. Engine lockout may occur after full torque derate and 3 engine restarts.

Tigercat T726G Trencher More severe technical faults will result in an engine lockout when the engine speed has derated to LOW and there have been 3 restarts. Once locked out the engine will only operate at LOW speed. The original cause(s) of the lockout must be corrected before the engine can be reset. Contact dealer to reset engine lockout for normal operation.

Refer to COMPUTER – MESSAGES– CRITICAL – ENGINE LOCKED OUT and COMPUTER – MESSAGES– CRITICAL – ENGINE RESTARTS REMAINING UNTIL ENGINE LOCKOUT in THIS SECTION. Identify the cause of the technical failure and take action to correct the problem.

Refer also to AFTERTREATMENT SYSTEM in SECTION 3 for more information.

This message will be displayed, alarm light will flash and alarm will sound when an aftertreatment technical fault is detected. Take immediate action to avoid affecting engine performance and damage to the diesel oxidation catalyst /selective catalytic reduction (DOC/SCR) aftertreatment system components.

The following engine derate sequence occurs immediately after the Aftertreatment System– Technical failure severe message: 1. Engine torque reduces to 75% of rated torque over the next 25 minutes.

2. The engine continues to operate at 75% of rated torque for approximately 65 minutes.

3. Engine torque reduces to 35% of rated torque over the next 40 minutes.

4. The engine continues to operate at 35% of rated torque for approximately 50 minutes.

5. Engine torque reduces to minimum value as engine speed reduces to LOW over the next 30 minutes.

Some less severe technical faults can be fixed after the engine speed has been fully derated to LOW.

2.68

Engine derate – technical failure and tampering

Tigercat T726G Trencher

Controls and Operation

AFTERTREATMENT SYSTEM TECHNICAL FAILURE – ENGINE DERATE SEQUENCE 100%

MIN

C

.

80%

≈ 25

90%

A

B

70%

≈ 65 MIN.

0M

50%

I N.

TORQUE

≈4

60%

40%

D

30%

≈ 50 MIN.

≈ 30

20%

MIN .

10% 0%

E

F

0

60

1000010

180

120

240

300

MINUTES

A Critical Message: Aftertreatment System– Technical Failure Severe.

Engine torque begins to reduce.

B Engine torque reduced to 75% after 25 minutes.

C Engine torque begins to reduce further after 65 minutes.

2.69

D

Engine torque reduced to 35% after 40 minutes.

E

Engine torque begins to reduce further after 50 minutes.

F

Engine speed reduced to LOW after 30 minutes.

Controls and Operation

Tigercat T726G Trencher

DIESEL EXHAUST FLUID QUALITY

Diesel Exhaust Fluid Quality warning severe. Engine lockout will occur after full torque derate and 3 engine restarts.

This message will be displayed, alarm light will flash and alarm will sound when a diesel fluid quality problem is detected. Take immediate action to correct the problem to avoid affecting engine performance and damage to the aftertreatment system components.

WARNING Use only diesel exhaust fluid (DEF) which meets ISO 22241 specifications. Do not fill the DEF tank with any other fluid.

DEF is injected into the exhaust gas stream during normal operation of the Selective Catalytic Reduction (SCR) aftertreatment system.

Use of other fluids may cause component damage, or a fire risk which could result in death or serious injury.

This message results in the following derate and engine lockout sequence if no action is taken to correct the problem: 1. Beginning approximately 50 minutes after a Diesel Exhaust Fluid – Quality warning severe message, engine speed ramps down to 1320 rpm and engine torque reduces to 35% of rated torque over the next 40 minutes.

2. After operating two hours at derated engine speed and torque, engine speed reduces to LOW and engine torque reduces to its minimum value over the next 30 minutes.

A total of three restarts are allowed after any derate has started. Refer to COMPUTER – MESSAGES– CRITICAL – ENGINE LOCKED OUT and COMPUTER – MESSAGES– CRITICAL – ENGINE STARTS REMAINING UNTIL ENGINE LOCKOUT in THIS SECTION. To correct the DEF quality problem, clean the area around the DEF tank then drain and refill the tank with clean DEF which meets ISO 22241 specifications.

Additional messages from the DENOX 2.2 Module will also be displayed. Refer to the ENGINE OPERATION AND MAINTENANCE MANUAL for code information.

NOTE: An ENGINE TORQUE DERATE ACTIVE message will also be triggered as the engine begins to derate. Refer to COMPUTER – MESSAGES– ALERT– ENGINE TORQUE DERATE ACTIVE. Refer to DIESEL EXHAUST FLUID TANK – DRAINING AND CLEANING in SECTION 3.

Refer also to AFTERTREATMENT SYSTEM in SECTION 3 for more information regarding the use of DEF and its function in the aftertreatment system.

2.70

Tigercat T726G Trencher ENGINE STARTS REMAINING UNTIL ENGINE LOCKOUT

Controls and Operation ENGINE LOCKED OUT

Engine

Engine

Engine locked out. Engine derate to 0% Torque and 850 rpm. Contact Dealer.

3 restarts remaining until engine lockout.

This message will be displayed, alarm warning light will flash and alarm will sound to inform the operator of the number of restarts available before the engine is locked out.

Note that an engine is locked out after several other critical aftertreatment system messages regarding the cause of the problem and this message regarding the number of restarts until engine lockout.

Refer to COMPUTER – MESSAGES– CRITICAL – ENGINE LOCKED OUT in THIS SECTION.

This message will be displayed, alarm warning light will flash and alarm will sound when an engine is locked out by the computer system to prevent further damage to the engine and aftertreatment system.

Note that an engine is locked out after several other critical aftertreatment system messages regarding the cause of the problem and additional messages regarding the number of restarts until engine lockout.

Once locked out the engine will only operate at LOW speed. The original cause(s) of the lockout must be corrected before the engine can be reset. Contact dealer to reset engine lockout for normal operation.

Refer to ENGINE OPERATION AND MAINTENANCE MANUAL. Refer to COMPUTER – MESSAGES– CRITICAL – ENGINE STARTS REMAINING UNTIL ENGINE LOCKOUT in THIS SECTION.

2.71

Controls and Operation

Tigercat T726G Trencher

AFTERTREATMENT SYSTEM ENGINE IDLE TOO LONG

Aftertreatment System Engine idle too long. Shutdown engine to prevent damage to emission control system.

This message will be displayed, alarm light will flash and alarm will sound when this engine has idled for more than one hour. Shutdown engine to prevent damage to the emission control system.

IMPORTANT! Engine should not idle longer than one hour.

Damage to the emission control system will result.

When this machine idles for an extended period excess hydrocarbon buildup is created in the SCR aftertreatment system. Burn off of excess hydrocarbon at full load immediately after a long idle period will generate excess heat which will cause damage to emission control system components. It will take 45 minutes at 40% load (or an SCR exhaust outlet temperature of 320°C (608°F) to burn off the hydrocarbon that accumulates during a long idle.

2.72

Tigercat T726G Trencher

Controls and Operation

ERROR MESSAGES (RED) Error messages advise the operator that a critical machine fault is about to occur or a system fault has occurred.

Error messages are computer system generated and are generally triggered by computer system error and fault related conditions.

Error messages have the second highest level of priority and are used to alert the operator to take immediate action to prevent damage to machine or to ensure operator safety.

Error messages are activated when a fault such as an electrical connection is broken/disconnected. Most error messages are due to computer system hardware or connection faults.

When an error message is displayed, the master alarm and alarm light will sound and flash continuously. The message remains on the screen until the operator hides it.

The message will give brief details of the fault and advise what action is necessary.

In some instances the machine requires immediate action to correct the problem which requires the operator to stop machine operation, shut the engine off and service the machine to correct the problem.

A list of some types of ERROR MESSAGES is as follows: Module VREF Error Voltage Input Error (VIN) Digital Input Error (DIN) Digital Output Error (DOUT) Current Output Error (COUT) Module No Contact Error NOTE: Not all error messages are shown.

However, if the machine cannot be stopped immediately for safety reasons, the operator can hide the message.

In this instance the machine should only be operated long enough to move the machine to a safe location then stop machine operation and shut the engine off before serious machine damage can occur!

Messages are acknowledged by pressing the F2 button (OK). To recall active messages turn ignition key switch off and on. On screen messages will indicate to the operator that an active hardware fault has been hidden.

Error messages flash the Critical symbol or the Alert above the F4 button when active messages are hidden depending on the type of error message. The symbol will continue to flash until the problem is resolved and the fault becomes inactive.

Active messages that have been hidden can be reviewed by pressing the F4 button.

2.73

Controls and Operation

Tigercat T726G Trencher

MODULE VREF ERROR The module VREF message will be displayed to indicate a problem related to the 5V reference signal coming from the module.

MD3 VREF error

The module is identified on the display screen.

This message indicates a problem with a sensor, connecting wires or the 5V reference signal itself.

Once acknowledged this message will be replaced with a hardware fault message for the corresponding module when active faults are recalled to the screen. Refer to COMPUTER – MESSAGES – CRITICAL – HARDWARE FAULT in THIS SECTION.

XA2-A0-Module 1 – Cab VREF error

XA2-A1-Module 2 – Rear Chassis VREF error

2.74

Tigercat T726G Trencher VOLTAGE INPUT ERROR (VIN)

Air Intake Sensor VIN Low error

Controls and Operation CURRENT OUTPUT ERROR (COUT) Current output error messages will be displayed to indicate a problem with a current output signal from a computer system module.

The module and pin number are identified on the display screen.

The heading identifies the signal destination and the text indicates the type of error.

The display is similar to the voltage input error message shown in VOLTAGE INPUT ERROR (VIN) on this page.

Voltage input error messages will be displayed to indicate a problem with a voltage input signal to a computer system module.

The module and pin number are identified on the display screen.

Once acknowledged these message will be replaced with a hardware failure message for the corresponding module when active faults recalled to the screen.

Refer to COMPUTER – MESSAGES – CRITICAL – HARDWARE FAULT in THIS SECTION.

COMPUTER MODULE BLANK SCREEN

The heading identifies the signal source and the text indicates the type of error.

An example of a voltage input error message is shown above.

DIGITAL INPUT ERROR (DIN) Digital input error messages will be displayed to indicate a problem with a digital input signal to a computer system module.

The module and pin number are identified on the display screen.

The heading identifies the signal source and the text indicates the type of error.

The display is similar to the voltage input error message shown in VOLTAGE INPUT ERROR (VIN) on this page.

DIGITAL OUTPUT ERROR (DOUT) Digital output error messages will be displayed to indicate a problem with a digital output signal from a computer system module.

The computer module is the central unit in the computer control system, which works as both a master and a display unit. Faults or failure in this unit will affect all other computer components.

The module and pin number are identified on the display screen.

Likely causes are:

The heading identifies the signal destination and the text indicates the type of error.

• Ground

The display is similar to the voltage input error message shown in VOLTAGE INPUT ERROR (VIN) on this page.

• Faulty computer

• Power – Fuse (Computer) • LCD display settings too light to read

2.75

Controls and Operation

Tigercat T726G Trencher

MODULE NO CONTACT ERROR The module no contact error message will be displayed to indicate a loss of communication with or power to a module. The module is identified on the display screen.

XA2-A0- Module 1– Cab No contact

When a module loses contact all machine functions controlled by that module cease and all messages associated with that module are triggered. If the problem is with the CAN wires all modules beyond the problem module will also be affected.

NOTE: If the display has a loss of power or other malfunction the screen may go blank and all machine functions controlled by the computer system will be affected.

Once acknowledged this message will be replaced with a hardware fault message for the corresponding module when active faults are recalled to the screen. Refer to COMPUTER – MESSAGES – CRITICAL – HARDWARE FAULT in THIS SECTION.

XA2-A1- Module 2– Rear Chassis No contact

Tigercat/FPT NEF No contact

2.76

Tigercat T726G Trencher

Controls and Operation

ALERT MESSAGES (YELLOW) Alert messages advise the operator that machine operation will be compromised.

Alert messages have the third highest level of priority and are used to indicate to the operator that action is required to prevent future damage to the machine.

All alert message will give brief details of the fault and advise what action is necessary.

Action should be taken to service the machine to correct the problem at the earliest opportunity to prevent future damage to the machine.

Alert messages flash the alert symbol above the F4 button when active messages are hidden.

The message remains on the screen until the operator hides it.

Active messages that have been hidden can be reviewed by pressing the F4 button. The symbol will continue to flash until the problem is resolved and the fault becomes inactive.

If both a critical level fault and an alert level fault are present the critical symbol will take priority until the critical fault becomes inactive.

There are two types of alert messages: 1. Alert programmed messages. The messages are generally initiated by machine function related conditions.

2. Alert computer system messages. These messages which are generally initiated by computer system errors and fault related conditions.

NOTE: Active hardware fault alert messages are acknowledged by pressing the F2 button (OK). To recall these messages turn ignition key switch off and on. On screen messages will indicate to the operator that an active hardware fault has been hidden.

When an alert message is displayed, the audible alarm and warning light will sound and flash on and off three times alerting the operator of the message. The alert message remains on the screen until the operator hides it.

Messages can be hidden by pressing the F2 button (Hide).

Alert computer system generated messages are generally triggered by computer system error and fault related conditions.

2.77

Controls and Operation INTERACTIVE ALERT MESSAGES

Tigercat T726G Trencher ENGINE AIR INTAKE FILTER RESTRICTED

A list of ALERT MESSAGES is as follows: • Engine Air Intake Filter Restricted • Drive Charge Filter Bypassed

Engine Air Intake Filter

• Fire Detection System Malfunction

Restricted. Service Machine to correct.

• Machine Voltage Low • Machine Voltage High • Engine Fault Code Messages • Engine Voltage Low • Engine Voltage High • Engine Coolant Temperature High • Engine Idle Automatically Increased

This message will be displayed when a signal is received from the restriction indicator switch on the engine air cleaner.

• Fuel Level Low

When this happens the engine air cleaner requires immediate service.

• Water In Fuel

Refer to AIR INTAKE SYSTEM in SECTION 3.

• Engine Torque Derate Active

ATTACHMENT CHARGE FILTER BYPASS

• Hardware Fault – MD3 (Computer) • Hardware Fault – Module XA2-A0 • Hardware Fault – Module XA2-A1

Attach Charge Filter

• Hardware Fault – Voltage Input

Bypassed. Service machine to correct.

• Hardware Fault – Digital Input • Hardware Fault – Digital Output • Hardware Fault – Current Output • Diesel Exhaust Fluid Quality * • Diesel Exhaust Fluid Level <10% * • Diesel Exhaust Fluid Level <5% * • Diesel Exhaust Fluid Level Empty * * NOTE: The aftertreatment system and its related components are applicable to Tier 4f machines only.

SOME TYPES OF COMPUTER SYSTEM GENERATED ALERT MESSAGES ARE LISTED BELOW:

This message will be displayed when an alert level active fault related to the ATTACHMENT CHARGE FILTER BYPASS has been triggered.

Service machine alert message is an example of the type of fault that triggers this message. The charge pressure filter is restricted and requires service, or the oil temperature is cold allowing the oil to bypass the filter.

• Module High Temperature – Alert • Module High Supply Voltage – Alert • Module Low Supply Voltage – Alert

2.78

Tigercat T726G Trencher DRIVE CHARGE FILTER BYPASS

Controls and Operation MACHINE VOLTAGE LOW

Drive Charge Filter

Machine Voltage

Bypassed. Service machine to correct.

This message will be displayed when an alert level active fault related to the DRIVE CHARGE FILTER BYPASS has been triggered.

Service machine alert message is an example of the type of fault that triggers this message. The charge pressure filter is restricted and requires service, or the oil temperature is cold allowing the oil to bypass the filter.

FIRE DETECTION SYSTEM MALFUNCTION

Low. Service machine to correct.

This message will be displayed when machine voltage readings of less than 20 volts are detected.

Machine voltage readings indicate voltage levels in the electrical system.

When this alarm is activated investigate the cause immediately.

MACHINE VOLTAGE HIGH

Fire Detection System

Machine Voltage

Malfunction. System will not detect fire. Repair system immediately.

High. Service machine to correct.

This message will be displayed when an alert level malfunction is detected in the fire detection system

This message will be displayed when machine voltage readings of greater than 30 volts are detected.

Refer to FIRE DETECTION SYSTEM in THIS SECTION for more information.

Machine voltage readings indicate voltage levels in the electrical system.

Refer also to WHAT TO DO IN CASE OF A MACHINE FIRE and WHAT TO DO AFTER A FIRE in SECTION 1.

When this alarm is activated investigate the cause immediately.

2.79

Controls and Operation ENGINE FAULT CODE MESSAGES

Tigercat T726G Trencher ENGINE VOLTAGE LOW

SPN: ##### 1 of 1

SPN: 8801 1 of 1

Contact service.

Engine voltage low.

Alert engine fault message(s) will be displayed, alarm light will flash and alarm will sound when an alert engine fault message is received from the engine electronic control module.

They provide the SPN code (suspect parameter number) and the FMI code (fault mode identifier) as well as a message describing the fault (when available).

This message will be displayed when engine voltage readings of less than 22 volts are detected.

When this alarm is activated investigate the cause immediately.

ENGINE VOLTAGE HIGH

Alert engine fault codes are lower priority messages than critical level engine fault code messages. Alert messages can be hidden but action (service engine) is required to resolve the cause of the fault.

SPN: 4449 1 of 1 Engine voltage high.

NOTE: Some less common engine fault codes will appear without a message describing the fault. Make a note of the SPN code and contact service for more information.

Refer to ENGINE OPERATION AND MAINTENANCE MANUAL for specific information regarding the engine.

This message will be displayed when engine voltage readings of greater than 30 volts are detected.

When this alarm is activated investigate the cause immediately.

2.80

Tigercat T726G Trencher ENGINE COOLANT TEMPERATURE HIGH

Controls and Operation ENGINE IDLE AUTOMATICALLY INCREASED

SPN: 62755 1 of 1

Engine Speed

Engine coolant temperature high.

Automatically increased to prevent damage to emission control system.

This message will be displayed, the alarm light will flash and the alarm will sound when engine temperature exceeds recommended engine temperature.

Investigate cause as soon as possible.

This message will be displayed when a malfunction of the emission control (aftertreatment) system is detected.

When this alarm is activated investigate the cause immediately.

When this alarm is activated check for: • Plugged cooler package air intake screens in doors and access panels.

• Plugged radiator.

Refer to CLEANING COOLER PACKAGE in SECTION 3.

Refer to COMPUTER – MESSAGES – CRITICAL – ENGINE COOLANT TEMPERATURE HIGH in THIS SECTION.

2.81

Controls and Operation FUEL LEVEL LOW

Tigercat T726G Trencher ENGINE TORQUE DERATE ACTIVE

Fuel

SPN: 64911 1 of 1

Level low.

Engine torque derate active.

This message will be displayed when the fuel level falls below 5% of full.

The fuel icon changes from white to yellow when the fuel level is low.

Refer to REFUELLING PROCEDURE in SECTION 3.

WATER IN FUEL

This message will be displayed, alarm light will flash and alarm will sound when the engine ECU has derated the engine. The code for a Torque Derate due to high NOx is shown above as an example.

Refer to ENGINE OPERATION AND MAINTENANCE MANUAL for code information to identify the cause(s) of engine derating and more information regarding failure cause and repair.

SPN: 17429 1 of 1 Water in fuel.

This message will be displayed when water is detected in the fuel.

When this alarm is activated check the fuel filter/water separator.

2.82

Tigercat T726G Trencher HARDWARE FAULT – MD3 (COMPUTER)

Controls and Operation HARDWARE FAULT – XA2-A1

Hardware Fault – MD3

Hardware Fault – XA2-A1

Active fault has been hidden. Turn key off and on to recall active hidden hardware faults.

Active fault has been hidden. Turn key off and on to recall active hidden hardware faults.

This message will be displayed when an alert level active hardware fault related to the computer has been hidden.

This message will be displayed when an alert level active hardware fault related to the XA2-A1 expansion module has been hidden.

To recall the original active fault(s) the operator must turn the ignition key switch OFF and ON.

To recall the original active fault(s) the operator must turn the ignition key switch OFF and ON.

High temperature, low supply voltage and high supply voltage module alert messages are examples of the type of hardware fault which will be the original active faults which trigger this message.

High temperature, low supply voltage and high supply voltage module alert messages are examples of the type of hardware fault which will be the original active faults which trigger this message.

HARDWARE FAULT – XA2-A0

Hardware Fault – XA2-A0 Active fault has been hidden. Turn key off and on to recall active hidden hardware faults.

This message will be displayed when an alert level active hardware fault related to the XA2-A0 expansion module has been hidden.

To recall the original active fault(s) the operator must turn the ignition key switch OFF and ON. High temperature, low supply voltage and high supply voltage module alert messages are examples of the type of hardware fault which will be the original active faults which trigger this message.

2.83

Controls and Operation HARDWARE FAILURE – VOLTAGE INPUT

Tigercat T726G Trencher HARDWARE FAILURE – CURRENT OUTPUT

Hardware Failure – VIN

Hardware Failure – COUT

Active fault has been hidden. Turn key off and on to recall active hidden hardware faults.

Active fault has been hidden. Turn key off and on to recall active hidden hardware faults.

This message will be displayed when a voltage input error message has been hidden.

This message will be displayed when a current output error message has been hidden.

To recall the original active fault(s) turn the ignition key OFF and ON.

To recall the original active fault(s) turn the ignition key OFF and ON.

HARDWARE FAILURE – DIGITAL INPUT

HARDWARE FAILURE – DIGITAL OUTPUT

Hardware Failure – DIN

Hardware Failure – DOUT

Active fault has been hidden. Turn key off and on to recall active hidden hardware faults.

Active fault has been hidden. Turn key off and on to recall active hidden hardware faults.

This message will be displayed when a digital input error message has been hidden.

This message will be displayed when a digital output error message has been hidden.

To recall the original active fault(s) turn the ignition key OFF and ON.

To recall the original active fault(s) turn the ignition key OFF and ON.

2.84

Tigercat T726G Trencher

Controls and Operation

MODULE HIGH TEMPERATURE – ALERT

MD3

Module high temperature alert message is displayed to indicate the computer control system has detected high temperature readings in a system module.

Display High temperature

The module is identified on the display screen. The temperature reading value is also displayed.

Once acknowledged this message will be replaced with a hardware fault message for the corresponding module when active faults are recalled to the screen. Refer to COMPUTER – MESSAGES – ALERT – HARDWARE FAULT in THIS SECTION.

Value: 75° C

XA2-A0 XA2-A0- Module 1– Cab High temperature

Value: 75° C

XA2-A1 XA2-A1- Module 2– Rear Chassis High temperature

Value: 75° C

MODULE HIGH SUPPLY VOLTAGE – ALERT

2.85

Controls and Operation

Tigercat T726G Trencher

Module high supply voltage alert message is displayed to indicate the computer control system has detected high supply voltage readings in a system module.

MD3 Display

The module is identified on the display screen. The voltage reading value is also displayed.

High supply voltage

Once acknowledged this message will be replaced with a hardware fault message for the corresponding module when active faults are recalled to the screen. Refer to COMPUTER – MESSAGES – ALERT – HARDWARE FAULT in THIS SECTION.

Value: 34 V

XA2-A0 XA2-A0- Module 1– Cab High supply voltage

Value: 75° C

XA2-A1 XA2-A1- Module 2– Rear Chassis High supply voltage

Value: 34 V

2.86

Tigercat T726G Trencher

Controls and Operation

MODULE LOW SUPPLY VOLTAGE – ALERT

MD3

Module low supply voltage alert message is displayed to indicate the computer control system has detected low supply voltage readings in a system module.

Display Low supply voltage

The module is identified on the display screen.

Once acknowledged this message will be replaced with a hardware fault message for the corresponding module when active faults are recalled to the screen. Refer to COMPUTER – MESSAGES – ALERT – HARDWARE FAULT in THIS SECTION.

XA2-A0 XA2-A0- Module 1– Cab Low supply voltage

XA2-A1 XA2-A1 Module 2– Rear Chassis Low supply voltage

2.87

Controls and Operation THE AFTERTREATMENT SYSTEM AND ITS RELATED COMPONENTS ARE APPLICABLE TO TIER 4F MACHINES ONLY.

DIESEL EXHAUST FLUID QUALITY

Tigercat T726G Trencher Refer to DIESEL EXHAUST FLUID TANK – DRAINING AND CLEANING in SECTION 3.

Refer also to AFTERTREATMENT SYSTEM in SECTION 3 for information regarding the use of DEF and its function in the aftertreatment system.

SPN: 19402

SPN: 19658

DEF quality low.

DEF quality low.

This message will be displayed, alarm light will flash and alarm will sound when a diesel fluid quality problem is detected. Take immediate action to correct the problem to avoid affecting engine performance and damage to the aftertreatment system components.

This message results in the following derate and engine lockout sequence if no action is taken to correct the problem: 1. Beginning approximately 50 minutes after a DEF quality low message, engine speed ramps down to 1320 rpm and engine torque reduces to 35% of rated torque over the next 40 minutes.

2. After operating for two hours at derated engine speed and torque, engine speed reduces to LOW and engine torque reduces to its minimum value over the next 30 minutes.

WARNING Use only diesel exhaust fluid (DEF) which meets ISO 22241 specifications. Do not fill the DEF tank with any other fluid.

DEF is injected into the exhaust gas stream during normal operation of the Selective Catalytic Reduction (SCR) aftertreatment system.

Use of other fluids may cause component damage, or a fire risk which could result in death or serious injury.

A total of three restarts are allowed after any derate has started. Refer to COMPUTER – MESSAGES– CRITICAL – ENGINE LOCKED OUT and COMPUTER – MESSAGES– CRITICAL – ENGINE RESTARTS REMAINING UNTIL ENGINE LOCKOUT in THIS SECTION. To correct the DEF quality problem, clean the area around the DEF tank then drain and refill the tank with clean DEF which meets ISO 22241 specifications.

Additional messages from the DENOX 2.2 Module will also be displayed. Refer to ENGINE OPERATION AND MAINTENANCE MANUAL for code information.

NOTE: An ENGINE TORQUE DERATE ACTIVE message will also be displayed as the engine begins to derate. Refer to COMPUTER – MESSAGES– ALERTS– ENGINE TORQUE DERATE ACTIVE.

2.88

T4f Engine derate – poor DEF quality

Tigercat T726G Trencher

Controls and Operation

DIESEL EXHAUST FLUID QUALITY – ENGINE DERATE SEQUENCE 100%

B

A ≈ 50 MIN.

90% 80%

≈ 40

70%

TORQUE

M I N.

60% 50% 40%

D

30%

≈ 120 MIN.

C

≈ 30

20%

MIN

0%

.

10%

E

0

1000009

A Alert Message: Poor DEF quality detected.

B Engine torque begins to reduce.

C Engine torque reduced to 35% after 40 minutes.

120

60

180

240

300

MINUTES

D Engine torque begins to reduce further after 120 minutes.

E Engine speed reduced to LOW after 30 minutes.

2.89

Controls and Operation DIESEL EXHAUST FLUID LEVEL There are three levels of diesel exhaust fluid level messages generated by the DENOX 2.2 Module.

DIESEL EXHAUST FLUID LEVEL BELOW 10%

Tigercat T726G Trencher Fill the DEF tank and restart the engine to clear the message.

Refer to DIESEL EXHAUST FLUID TANK – FILLING in SECTION 3.

DIESEL EXHAUST FLUID LEVEL EMPTY

SPN: 61839 1 of 1

SPN: 64191 1 of 1

DEF Level below 10%.

This message will be displayed, alarm light will flash and alarm will sound when a diesel exhaust fluid level below 10% is detected. Take immediate action to correct DEF levels to avoid affecting engine performance and damage to the aftertreatment system components.

The engine will continue to operate normally for approximately one hour after this message is displayed.

Fill the DEF tank and restart the engine to clear the message.

Refer to DIESEL EXHAUST FLUID TANK – FILLING in SECTION 3.

DIESEL EXHAUST FLUID LEVEL BELOW 5%

SPN: 62095 1 of 1 DEF Level below 5%.

DEF tank empty.

This message will be displayed, alarm light will flash and alarm will sound when diesel exhaust fluid level empty is detected. Take immediate action to correct DEF levels to avoid affecting engine performance and damage to the aftertreatment system components.

Beginning immediately after a DEF tank empty message, engine speed reduces to LOW and engine torque reduces to its minimum value over the next 30 minutes.

Fill the DEF tank and restart the engine to clear the message.

Refer to DIESEL EXHAUST FLUID TANK – FILLING in SECTION 3.

NOTE: An ENGINE TORQUE DERATE ACTIVE message will also be displayed as the engine begins to derate. Refer to COMPUTER – MESSAGES– ALERT– ENGINE TORQUE DERATE ACTIVE.

This message will be displayed, alarm light will flash and alarm will sound when a diesel exhaust fluid level below 5% is detected. Take immediate action to correct DEF levels to avoid affecting engine performance and damage to the aftertreatment system components.

Beginning immediately after a DEF Level below 5% message, engine speed ramps down to 1320 rpm and engine torque reduces to 35% of rated torque over the next 40 minutes.

2.90

T4f Engine derate – low DEF level

Tigercat T726G Trencher

Controls and Operation

DIESEL EXHAUST FLUID LEVEL – ENGINE DERATE SEQUENCE 100% 90%

A

≈ 60 MIN.

B

80% 70% ≈ 40 MIN

60%

.

TORQUE

50% 40% ≈ 20 MIN.

30%

C

D 0M

≈3

20%

1000008

.

0%

IN

10% <10%

<5%

≈ 1.8%

E

0

DEF LEVEL

A Alert Message: DEF Level Below 10%.

B Alert Message: DEF Level Below 5%. Engine torque begins to reduce.

C Engine torque reduced to 35% after 40 minutes.

2.91

D DEF tank empty. Engine speed begins to reduce to LOW. E Engine speed reduced to LOW after 30 minutes.

Controls and Operation

Tigercat T726G Trencher

BATTERY BOOSTING

4. Open the battery access door and locate the positive (+) terminal on the upper battery and the negative (– ) battery terminal on the lower battery.

NOTICE

5. Remove the protective covers from the battery terminals.

This machine has a 24 volt starting system. Only use the same voltage when boosting with an auxiliary battery. Using a higher or lower voltage will cause serious damage to the electrical system. Only a compatible (same) voltage is permissible.

B

A

A

B

700236

B

A Negative Terminal (Lower Battery) B Positive Terminal (Upper Battery)

6. Connect the clamp of the red jumper cable to the positive (+) terminal of the dead (upper) battery.

C 700237

A Battery Access Door B Batteries C Machine Booster Socket Location

The batteries are located in the battery compartment at the left rear corner of the machine. Remove the battery compartment panel for complete access to the batteries.

BATTERY BOOSTER CABLE WITH CLAMPS 1. Bring the machines as close as possible, make sure the machines do not touch.

WARNING 24 VOLT ELECTRICAL SYSTEM 2. Make sure the machine with the good battery uses a 24 volt system.

3. Turn OFF the ignition of both machines.

7. Connect the other clamp of the red jumper cable to the positive (+) terminal of the good battery.

8. Connect the clamp of the black jumper cable to the negative ( – ) terminal of the good battery.

9. Connect the other clamp of the black jumper cable to the negative ( – ) terminal of the dead (lower) battery.

10. Start the engine of the machine with the good battery.

11. Start the engine of the machine with the dead batteries.

12. Disconnect the clamp of the black jumper cable from the negative ( – ) terminal of the lower battery.

13. Disconnect the clamp of the black jumper cable from the negative (-) terminal of the good battery.

14. Disconnect the clamp of the red jumper cable from the positive (+) terminal of the good battery.

15. Disconnect the clamp of the red jumper cable from the positive (+) terminal of the upper battery.

16. Replace the protective covers on the battery terminals.

If the batteries require charging, refer to BATTERY CARE in SECTION 3.

2.92

Tigercat T726G Trencher

Controls and Operation

BATTERY BOOSTER CABLE WITH SOCKET AND PLUG

A

1. Bring the machines as close as possible, make sure the machines do not touch.

B

WARNING 24 VOLT ELECTRICAL SYSTEM 845D-089

2. Make sure the machine with the good battery uses a 24 volt system.

3. Turn OFF the ignition of both machines.

C

A Clamps B Booster Cable C Booster Cable Plug

6. Connect the clamp of the red booster cable to the positive (+) terminal of the good battery.

7. Connect the clamp of the black booster cable to the negative ( – ) terminal of the good battery.

8. Connect the battery booster cable plug into the machine socket.

9. Start the engine of the machine with the good battery.

A

B

10. Start the engine of the machine with the dead batteries.

11. Remove the battery booster cable plug from the machine socket.

700231

700232

A Protective Cover – Machine Booster Socket B Machine Booster Socket

4. Open the battery disconnect door or remove the main fuse and relay panel access panel and locate the machine booster socket.

5. Remove the protective cover from the machine booster cable socket.

12. Replace the protective cover on the machine socket.

13. Disconnect the clamp of the black jumper cable from the negative (-) terminal of the good battery.

14. Disconnect the clamp of the red jumper cable from the positive (+) terminal of the good battery.

If the batteries require charging, refer to BATTERY CARE in SECTION 3.

2.93

Controls and Operation

REFUELLING WARNING

Tigercat T726G Trencher THE AFTERTREATMENT SYSTEM AND ITS RELATED COMPONENTS ARE APPLICABLE TO TIER 4F MACHINES ONLY.

Do not refuel while smoking or while near an open flame or sparks.

S≤15 mg/kg ULTRA LOW SULFUR FUEL ONLY 36686AUNI R0

Refuelling of the machine is a critical component of proper operation. It is important to follow the proper procedures based on the refuelling options available for your machine. It is also important to verify the proper type and grade of fuel is used in your machine. Refer to REFUELLING PROCEDURE in SECTION 3 for complete details.

IMPORTANT! Do not idle the engine longer than one hour. Damage to the emission control system will result. When this machine idles for an extended period, excess hydrocarbon buildup is created in the DOC/SCR aftertreatment system. Burn off of excess hydrocarbon, at full load, immediately after a long idle period, generates excess heat which causes damage to emission control system components.

2.94

Tigercat T726G Trencher

Controls and Operation

AIR COMPRESSOR – AIR SUPPLY An air compressor and two air tanks are provided as an air supply for air tools.

The compressor governor turns the compressor on at 5.5 bar (80 psi) and off at 8.3 bar (120 psi). A pressure relief valve (10.3 bar/150 psi max) is located on the top tank.

A

A

T726G-065

A Air Compressor

T726G-109

The air compressor is mounted on the engine on the right side of the machine.

A Air Tool Supply Quick Connector

The air tool supply quick connector is located in the front valve compartment.

DRAINING THE AIR SUPPLY

B

A

A

C

B T726G-113

A

D

A Lower Tank B Drain Valve

To remove moisture from the system, turn OFF the engine and drain the air supply at the drain valve daily.

700495

A B C D

Air Tank Pressure Relief Valve Governor Drain Valve

The air tanks and governor are mounted inside the battery compartment at the left rear of the machine.

2.95

Controls and Operation

Tigercat T726G Trencher

OPERATING THE MACHINE The appropriate lubrication and maintenance schedule must been performed prior to operating the machine.

Refer to SCHEDULED MAINTENANCE in SECTION 3.

A

Refer to the ENGINE OPERATION AND MAINTENANCE MANUAL supplied with the machine.

Personnel who are to operate this machine must be fully trained in safety and operating procedures by a competent person.

B

PRE-START CHECKS 1. Unlock cab doors, engine enclosure doors and rear service compartment doors.

T726G-010

A Charge Gauge B Fire Extinguisher

4. Check portable fire extinguisher for sufficient charge.

A

T726G-007

A Ignition Key Switch – OFF

2. Set the ignition key switch to the OFF position.

A

B 700498

A Fuel Level Indicator B DEF Level Indicator A

5. Turn the ignition key switch to the RUN position to check fuel and DEF levels on the computer display main screen. Fill fuel and DEF to the required levels.

Refer to REFUELLING PROCEDURE and DIESEL EXHAUST FLUID TANK – FILLING in SECTION 3.

T726G-006

NOTE: The DEF level indicator is applicable to Tier 4f machines only.

A Parking Brake Switch

3. Check the parking brake for proper operation and apply the parking brake.

2.96

Tigercat T726G Trencher

Controls and Operation

A A

B

700240

700238

A Pump Drive Gearbox Dipstick

A Hydraulic Oil Level Sight Gauge B Hydraulic Oil Level Sending Unit

6. Check the hydraulic oil level. The sight gauge is located in the left rear of the pump compartment.

8. Check the pump drive gearbox oil level. Dipstick is located in the left of the pump compartment.

The level of the oil must be between the ADD and FULL marks on the dipstick. Refer to PUMP DRIVE GEARBOX in SECTION 3.

The level should be between the HIGH and LOW marks on the level gauge with all cylinders fully retracted. Refer to REFILLING THE HYDRAULIC SYSTEM in SECTION 3.

A

A

700239

700241

A Engine Oil Dipstick

7. Check the engine oil level. Dipstick is located in the left side engine compartment.

A Transmission Oil Dipstick

9. Check the transmission oil level. Dipstick is located on right side of the machine behind the cab.

The level of the oil must be between the ADD and FULL marks on the dipstick. Refer to TRANSMISSION in SECTION 3.

The level of the oil must be between the ADD and FULL marks on the dipstick. Refer to the ENGINE OPERATION AND MAINTENANCE MANUAL.

2.97

Controls and Operation

Tigercat T726G Trencher

A

A T726G-054

700242

A Engine Air Precleaner

A Air Cleaner Unloader Valve

10. Check the air intake precleaner. Remove any blockages or obstructions. Refer to AIR INTAKE SYSTEM– ENGINE AIR PRECLEANER in SECTION 3.

B

12. Check the air cleaner unloader valve. The valve is located in the right engine compartment of the machine. Refer to AIR INTAKE SYSTEM– AIR CLEANER UNLOADER VALVE in SECTION 3.

A

700216

A Air Filter Restriction Indicator B Air Filter Restriction Sensor

11. Check the air filter restriction indicator. Service to the air filter is required when the restriction indicator shows RED. Refer to AIR INTAKE SYSTEM– FILTER RESTRICTION INDICATOR in SECTION 3.

A

700088

A Fuel Filter/Water Separator Drain Plug

13. Check fuel filter/water separator and drain any accumulated water into a bowl and clean up any spills. Refer to FILTERS– FUEL FILTER/WATER SEPARATOR in SECTION 3.

2.98

Tigercat T726G Trencher

Controls and Operation

A

A

B

C

D

T726G-037

870DLX-60

A B C D

A Serpentine Belt

14. Check tension and condition of the engine serpentine belt. Refer to AIR CONDITIONING SYSTEM– SERPENTINE BELT in SECTION 3.

Hydraulic Oil Cooler A/C Condenser Core Radiator (Engine Coolant Core) Charge Air Cooler

16. Clean the cooler package if required. Refer to CLEANING COOLER PACKAGE in SECTION 3.

17. Inspect machine for leaks, damaged or loose components or any other abnormal conditions.

18. Fasten all doors covers and access panels securely.

A

19. Check tire pressure. Refer to TIRE PRESSURES in SECTION 3.

20. Check wheel bolts for tightness.

21. Check all exits.

M726E-130

A Engine Coolant Fill Cap

15. Check engine coolant level in the surge tank. Fill as required.

22. Inspect all windows daily and immediately after any impacts. Refer to WINDOWS – INSPECTION AND MAINTENANCE in SECTION 3.

NOTE: A low level sensor warns the operator if the coolant level falls below an acceptable level.

WARNING Turn OFF the engine. Only remove the engine coolant fill cap when cool enough to touch with bare hands. Slowly loosen the fill cap to the first stop to relieve the pressure before removing completely.

2.99

Controls and Operation

Tigercat T726G Trencher

STARTING ENGINE 1. Perform all PRESTART CHECKS. Refer to OPERATING THE MACHINE – PRESTART CHECKS in THIS SECTION. 2. Apply the parking brake.

NOTE: The engine will not crank until the parking brake is applied.

CAUTION Do not attempt to start the engine by shorting across the starter terminals as personal injury could occur. Start engine only from the operator's seat.

WARNING

3. Check that all personnel are clear of the machine.

4. Insert the ignition key and turn ignition key switch to the RUN position. The WAIT TO START icon below will appear on the display during the 'key ON' engine preheat time. Heating elements (grid heater elements) located in the engine air intake manifold are turned ON to heat the intake air when starting the engine. The engine must not be started until this icon automatically turns OFF.

Do not use ether! The engine is equipped with an electrical starting aid. Use of ether can cause an explosion and severe injury.

IMPORTANT! Allow a cold engine to warm up at LOW speed for at least five minutes before applying any load. Check all measured values on the computer display often during the warm-up period.

A

2000132

A WAIT TO START Icon

5. Sound the horn to warn personnel of machine startup.

6. Turn the ignition key switch to the START position to crank the engine.

7. When the engine starts, release the ignition key switch to the RUN position.

NOTE: If the engine does not start after three attempts, check the fuel supply system.

8. Set engine speed to LOW and wait three to five minutes before operating with a load.

9. Increase engine speed slowly to provide adequate lubrication to the bearings and allow oil pressure to stabilize.

If the engine stalls while operating the machine, turn the ignition key switch to the OFF position and repeat steps 1 through 7.

2.100

Tigercat T726G Trencher

Controls and Operation

COLD WEATHER STARTING

6. Activate the interlock system and turn ON the attachment.

WARNING

• Operate the drum for five minutes.

7. Turn OFF the attachment.

Do not use ether! The engine is equipped with an electrical starting aid. Use of ether may cause an explosion and severe injury.

8. Increase engine speed to 1100 rpm and begin slow boom movements.

• The hydraulic filter bypass icon must be OFF.

IMPORTANT! Cold start-ups can result in pump failure. Refer to APPROVED HYDRAULIC OILS in SECTION 3 for recommended oil viscosity and temperature ranges.

• Operate the boom to raise the attachment off the ground.

• Operate the boom tilt function forward and back very slowly.

NOTE: Cold temperatures require the use of an engine block heater and a hydraulic oil heater. Preheating of hydraulic oil is recommended as standard procedure in cold weather.

9. Operate the steer function left and right a few times.

1. Follow the STARTING ENGINE instructions for this COLD WEATHER STARTING procedure, paying attention to the WAIT TO START icon on the computer display.

This message will be ON during the key RUN engine preheat time. The engine must not be started until this message turns OFF automatically.

NOTE: If at any time during the warming procedure, the hydraulic filter bypass message appears on the computer display, return engine speed to LOW. 2. During the engine warm-up period constantly monitor the engine coolant temperature and the engine oil pressure. Turn OFF the engine if any pressure or temperature does not meet the specification.

10. Place the travel speed control lever in the LOW position and operate the drive function forward and reverse a few times.

11. Observe the hydraulic oil temperature. Do not begin any work until temperature reaches 10°C (50°F).

12. Increase engine speed to 1500 rpm, and begin driving to the work area in LOW travel speed. Do not go to maximum travel speed until the hydraulic oil reaches 32°C (90°F). Mulching or cutting may begin but work very slowly. The machine functions will seem to operate much slower until the systems are warmed up. Avoid operating the boom functions quickly until the hydraulic oil is above 32°C (90°F).

Work the machine for thirty minutes at 1500 rpm.

13. When the hydraulic oil reaches 32°C (90°F) and the machine has been operated for 30 minutes, it is safe to increase engine speed to HIGH.

3. Continue with MACHINE PREPARATION – SYSTEM TEST AND WARM-UP in THIS SECTION. 4. Start the engine and keep engine speed at LOW. 5. Confirm all of the following conditions are present before proceeding to the next step: • Hydraulic filter bypass icon is OFF. • Engine coolant temperature reaches 60°C (140°F).

• Hydraulic oil temperature reaches −7°C (20°F).

• Cooling fan is turning.

NOTE: At a starting temperature of −18°C (0°F), it will take approximately thirty minutes to complete the above step.

2.101

Controls and Operation

ENGINE, RESTARTING AFTER ENGINE RUNS OUT OF FUEL WARNING Do not use ether! The engine is equipped with an electrical starting aid. Use of ether may cause an explosion and severe injury.

NOTICE Engaging the starter motor for longer than 20 seconds risks damage to the motor. Do not engage the motor for longer than 20 seconds.

Wait two minutes between each attempt to start the engine.

Tigercat T726G Trencher 1. Fill the fuel tank up to capacity.

2. Loosen the vent plug on the fuel filter/water separator head.

3. Turn the ignition key switch to the run position to energize the fuel supply shut-off valve.

4. Use the manual priming pump to bleed air from the fuel line and prime the fuel filter/water separator.

Continue pumping until fuel spills through the open vent plug.

5. Tighten the vent plug.

6. Clean any spilled fuel and safely dispose of cleaning supplies before starting the engine.

7. Sound the horn to warn personnel of machine startup.

8. Turn the ignition key to the run position.

9. When the Wait to Start icon disappears from the computer display turn the ignition key switch to the start position.

10. Release the key if the engine fails to start after 20 seconds. Wait for two minutes before making a second attempt.

11. With the engine running, check the fuel filter/water separator for leaks.

2.102

Tigercat T726G Trencher

Controls and Operation

STOPPING ENGINE IMPORTANT! Stopping the engine immediately after it has been working under load can result in overheating and premature wear of the engine components. Follow the stopping procedure outlined below to allow the engine to cool. The important benefits are: • Extended life of engine, cooling and exhaust systems.

• Reduced risk of post shutdown fires.

• Interior of machine cools significantly reducing risk of touching hot surfaces.

1. Turn the attachment OFF before leaving the cutting area.

2. Locate a clear and level area, a least 15 m (50 ft) from any other equipment, to park the machine.

3. Park the machine on level ground with the attachment resting firmly on the ground. Refer to PARKING THE MACHINE in SECTION 1.

4. Apply the parking brake.

5. Set engine speed at LOW, deactivate the interlock system (open a cab door) and run the engine at LOW for three minutes minimum to dissipate heat and reduce the turbocharger speed. This will also prevent loss of coolant by after boil and possible hot spot damage to the engine.

Do not increase engine speed before turning it off.

6. Turn OFF the engine.

7. Remove the ignition key.

NOTE: For Tier 4f machines, when the engine is stopped, all DEF solution is pumped back to tank before the engine power system is turned off. This process takes approximately 90 seconds. Refer to AFTERTREATMENT SYSTEM in SECTION 3 for more information.

NOTE: The aftertreatment system and its related components are applicable to Tier 4f machines only.

NOTE: The saw blade must be stopped before exiting the cab.

8. Install the saw blade guard.

9. Turn OFF the battery disconnect switch if required by the servicing procedure or if the vehicle is to be parked for an extended period of time, such as overnight.

10. Perform EVERY 8 HOURS maintenance at the end of the shift (greasing, clean engine compartment, etc.). This allows the machine time to cool down while under the watchful eye of the operator.

2.103

Controls and Operation

MACHINE PREPARATION SYSTEM TEST AND WARM-UP Prior to commencing operations follow steps 1 – 14 to accomplish the following:

Tigercat T726G Trencher 9. When cold weather conditions exist, continue the process of warming up the hydraulic system by repeating Steps 7 – 8 several times. As the hydraulic system warms up, engine speed can be increased gradually to HIGH. If the RETURN OIL FILTERS BYPASSED message appears on the computer display, decrease engine speed immediately and continue warming the system.

• Warm up the hydraulic system.

• Test all systems for proper operation.

• Inspect for hydraulic oil leaks.

WARNING Clear all personnel from the attachment and machine areas during this procedure. Broad movements of the attachment, boom, and other functions can cause serious injury or death to bystanders.

10. Turn ON the attachment. Refer to ATTACHMENT MANUFACTURER'S DOCUMENTATION and check the attachment for proper operation according to manufacturer’s instructions.

11. After completion of the warm-up and system testing, turn OFF the attachment, stop the blade and rest it on the ground.

12. Apply the parking brake.

13. Set engine speed at LOW.

NOTICE Stop the system test if the machine has any operating problems or is not working normally.

Service the machine to correct the problem or serious damage to pumps and other components may result.

1. Close the cab doors and sound horn to warn personnel of machine start-up.

14. Leave the cab and visually check hose connections and cylinders for leaks. Check under the machine for oil leaks.

WARNING Do not leave the cab until the saw blade has stop rotating.

WARNING

2. Clear personnel from the area before starting the engine.

3. Start the engine. Refer to STARTING ENGINE in THIS SECTION. 4. Ensure the computer display and alarm light are indicating normal operating conditions.

5. Press and release the interlock reset switch.

6. Set engine speed at LOW. 7. Slowly raise and lower the boom and check for proper operation.

8. With the attachment raised slightly off the ground: a. Operate the accumulator and clamp arms and check for proper operation. b. Tilt the attachment forward and back and check that it is operating correctly. c.

Do not use your bare hand to check for fluid leaks.

Fluid leaks under pressure may not be visible.

When searching for leaks, wear work gloves and use a wrench or piece of wood to move hydraulic hoses. Do not grab hold of hydraulic hoses. Wear safety goggles for eye protection.

Steer the machine to the left and right.

2.104

LUBRICATION AND MAINTENANCE.................................................................................................................3

Tigercat T726G Trencher SECTION 3 – LUBRICATION AND MAINTENANCE Read and understand the entire contents of this manual, and all manuals for any attachments or accessories associated with this machine, prior to operating or servicing this equipment.

CONTENTS – SECTION 3 A

ISSUE 3.0, APRIL 2020

ACCESS DOORS AND COVERS............................................................................................................................ 3.25 AFTERTREATMENT SYSTEM (TIER 4F MACHINES ONLY)............................................................................... 3.61 APPROVED ANTI-SEIZE PASTES FOR SENSORS.......................................................................................... 3.84 CATALYTIC CONVERTER.................................................................................................................................... 3.81 DEF (DIESEL EXHAUST FLUID).......................................................................................................................... 3.70 DEF QUALITY SENSOR........................................................................................................................................ 3.65 DEF SUPPLY LINES, HEATED............................................................................................................................. 3.72 DEF SUPPLY MODULE......................................................................................................................................... 3.74 DENOX 2.2 DOSING SYSTEM............................................................................................................................. 3.73 DIESEL EXHAUST FLUID (DEF).......................................................................................................................... 3.70 DIESEL OXIDATION CATALYST (DOC)............................................................................................................... 3.74 DOSING MODULE (DEF INJECTOR).................................................................................................................. 3.80 EXHAUST FLAP..................................................................................................................................................... 3.73 HEATER VALVE..................................................................................................................................................... 3.72 HUMIDITY AND TEMPERATURE SENSOR........................................................................................................ 3.82 MIXER TUBE.......................................................................................................................................................... 3.80 NH3 SENSOR......................................................................................................................................................... 3.83 NOX SENSOR........................................................................................................................................................ 3.83 SYSTEM COMPONENTS...................................................................................................................................... 3.62 TANK, DIESEL EXHAUST FLUID......................................................................................................................... 3.65 TEMPERATURE SENSORS................................................................................................................................. 3.82 AIR CONDITIONING SYSTEM................................................................................................................................ 3.37 CAB AIR FILTERS.................................................................................................................................................. 3.38 COMPRESSOR...................................................................................................................................................... 3.37 CONDENSER......................................................................................................................................................... 3.37 EVAPORATOR, HEATER CORE AND BLOWERS.............................................................................................. 3.38 INSPECTION.......................................................................................................................................................... 3.39 RECEIVER-DRIER................................................................................................................................................. 3.37 SERPENTINE BELT............................................................................................................................................... 3.40 AIR INTAKE SYSTEM............................................................................................................................................... 3.54 AIR CLEANER........................................................................................................................................................ 3.55 AIR CLEANER UNLOADER VALVE..................................................................................................................... 3.56 AIR FILTER RESTRICTION SENSOR................................................................................................................. 3.56 AIR INTAKE TUBING AND JOINTS...................................................................................................................... 3.54 CHANGING FILTER ELEMENTS.......................................................................................................................... 3.55 ENGINE AIR PRECLEANER................................................................................................................................. 3.54 FILTER RESTRICTION INDICATOR.................................................................................................................... 3.56 IMPROPER SERVICING....................................................................................................................................... 3.55 OVER SERVICING................................................................................................................................................. 3.55 ANTI-CORROSION SPRAY, REMOVAL................................................................................................................ 3.106 APPROVED HYDRAULIC OILS............................................................................................................................... 3.20 ARTICULATION LOCK BAR INSTALLATION......................................................................................................... 3.21 AXLE LUBRICATION................................................................................................................................................ 3.93 AXLE DRAIN AND FILL LOCATIONS................................................................................................................... 3.94 CHECKING AXLE OIL LEVEL............................................................................................................................... 3.93 DRAINING AND REFILLING AXLES.................................................................................................................... 3.93 REAR AXLE – LIMITED SLIP ADDITIVES............................................................................................................ 3.93

B

Lubrication and Maintenance

Tigercat T726G Trencher

BATTERY CARE........................................................................................................................................................ 3.45 BELT, SERPENTINE................................................................................................................................................. 3.40 BRAKE, PARKING..................................................................................................................................................... 3.88 C

CARE OF POLYCARBONATE WINDOWS............................................................................................................ 3.103 CARE OF THE MACHINE......................................................................................................................................... 3.99 CASE DRAIN STRAINER......................................................................................................................................... 3.35 CENTER JOINT......................................................................................................................................................... 3.85 LUBRICATION........................................................................................................................................................ 3.85 MAINTENANCE...................................................................................................................................................... 3.85 CENTER JOINT LOCK PIN...................................................................................................................................... 3.21 CLEANING COOLER PACKAGE........................................................................................................................... 3.101

D

DIAGNOSTICS CONNECTION................................................................................................................................ 3.44 DIESEL EXHAUST FLUID (DEF) (TIER 4F MACHINES ONLY)............................................................................ 3.70 DISPOSAL.............................................................................................................................................................. 3.66 HANDLING AND STORAGE................................................................................................................................. 3.71 PROPER HANDLING PRACTICES...................................................................................................................... 3.71 DIESEL EXHAUST FLUID TANK DEF QUALITY SENSOR........................................................................................................................................ 3.65 DRAINING AND CLEANING................................................................................................................................. 3.66 FILLING................................................................................................................................................................... 3.69 SENDING UNIT...................................................................................................................................................... 3.65 STRAINER, CLEANING......................................................................................................................................... 3.69 DRIVESHAFTS INSTALLATION....................................................................................................................................................... 3.92 LUBRICATION........................................................................................................................................................ 3.90 DRUM WATER SPRAY SYSTEM COMPONENTS...................................................................................................................................................... 3.57 FILL CONNECTION/SHUT-OFF VALVE............................................................................................................... 3.58

E

EMERGENCY EXITS.................................................................................................................................................. 3.9 ENGINE ACCESS PANELS...................................................................................................................................... 3.25 ENGINE AIR PRECLEANER.................................................................................................................................... 3.54 ENGINE DIAGNOSTICS CONNECTION................................................................................................................ 3.44

F

FILTERS ATTACHMENT PUMP CHARGE PRESSURE..................................................................................................... 3.35 CAB AIR.................................................................................................................................................................. 3.38 DEF DOSING MODULE......................................................................................................................................... 3.75 DRIVE PUMP CHARGE PRESSURE................................................................................................................... 3.35 ENGINE OIL............................................................................................................................................................ 3.46 FUEL........................................................................................................................................................................ 3.47 FUEL FILTER/WATER SEPARATOR.................................................................................................................... 3.48 HYDRAULIC OIL RETURN.................................................................................................................................... 3.33 FIRE PREVENTION.................................................................................................................................................. 3.10 FLUID ANALYSIS PROGRAM FLUID ANALYSIS KITS............................................................................................................................................ 3.6 FLUID SAMPLING PROGRAM.................................................................................................................................. 3.7 FLUID SAMPLE COLLECTION PROCEDURES................................................................................................... 3.7 FUEL, REFUELLING................................................................................................................................................. 3.53 FUEL TANK................................................................................................................................................................ 3.51 CAPACITY............................................................................................................................................................... 3.51 FUEL FILL CAP...................................................................................................................................................... 3.51 FUEL FILL STRAINER, REMOVAL AND CLEANING.......................................................................................... 3.51 3.2

Tigercat T726G Trencher

Lubrication and Maintenance

FUSES AND RELAYS BATTERY COMPARTMENT.................................................................................................................................. 3.43 CAB......................................................................................................................................................................... 3.42 G

GRAFFITI REMOVAL.................................................................................................................................... 3.99, 3.105

H

HEATER, FUEL.......................................................................................................................................................... 3.50 HYDRAULIC OIL OPERATING RANGE CHART.................................................................................................... 3.20 HYDRAULIC SYSTEM.............................................................................................................................................. 3.29 CASE DRAIN STRAINER...................................................................................................................................... 3.35 FILTER CHANGE PROCEDURE.......................................................................................................................... 3.34 FILTER RESTRICTION PRESSURE SWITCH.................................................................................................... 3.33 FILTERS, HYDRAULIC OIL RETURN.................................................................................................................. 3.33 HYDRAULIC OIL HAND FILL PUMP.................................................................................................................... 3.31 HYDRAULIC OIL TANK.......................................................................................................................................... 3.30 LOW LEVEL SENDING UNIT............................................................................................................................. 3.30 OIL LEVEL SIGHT GAUGE................................................................................................................................ 3.30 RETURN DIFFUSER/STRAINERS.................................................................................................................... 3.36 TEMPERATURE SENDING UNIT...................................................................................................................... 3.30 REFILLING.............................................................................................................................................................. 3.32

N

NEW MACHINE MAINTENANCE FIRST 125 HOUR INSPECTION REPORT............................................................................................................ 3.5 INITIAL PRE-DELIVERY INSPECTION................................................................................................................. 3.5 TIGHTENING POINTS............................................................................................................................................. 3.5

P

PARKING BRAKE...................................................................................................................................................... 3.88 CHECKING OIL LEVEL......................................................................................................................................... 3.89 DRAINING AND REFILLING................................................................................................................................. 3.89 PRESSURE AND SPEED SETTINGS................................................................................................................... 3.107 PRESSURE WASHING........................................................................................................................................... 3.100 PREVENTIVE MAINTENANCE SCHEDULE............................................................................................................ 3.5 PUMP DRIVE GEARBOX CHECKING OIL LEVEL......................................................................................................................................... 3.87 DRAINING AND REFILLING................................................................................................................................. 3.87

R

REFILLING THE HYDRAULIC SYSTEM................................................................................................................. 3.32 REFRIGERANT SPECIFICATION........................................................................................................................... 3.37 REFUELLING PROCEDURE................................................................................................................................... 3.53

S

SCHEDULED MAINTENANCE GENERAL................................................................................................................................................................. 3.8 FREQUENTLY........................................................................................................................................................ 3.11 8 HOURS................................................................................................................................................................. 3.13 48 HOURS............................................................................................................................................................... 3.13 250 HOURS............................................................................................................................................................. 3.14 500 HOURS............................................................................................................................................................. 3.14 1000 HOURS........................................................................................................................................................... 3.15 2000 HOURS........................................................................................................................................................... 3.16 2 YEARS................................................................................................................................................................. 3.17 SEASONAL............................................................................................................................................................. 3.17 SERVICE AND LUBRICATION POINTS.................................................................................................................. 3.18 STARTUP PROCEDURE AFTER MAJOR MACHINE MAINTENANCE................................................................ 3.96

3.3

Lubrication and Maintenance

Tigercat T726G Trencher

STRAINERS CASE DRAIN.......................................................................................................................................................... 3.35 FUEL TANK............................................................................................................................................................. 3.52 HYDRAULIC OIL RETURN.................................................................................................................................... 3.36 T

TIRE PRESSURES................................................................................................................................................. 3.113 TORQUE CHART, GENERAL................................................................................................................................. 3.109 TORQUE CHART, SPECIFIC................................................................................................................................. 3.108 TORQUE, FLUID CONNECTIONS............................................................................................................. 3.110, 3.111 TOWING INSTRUCTIONS....................................................................................................................................... 3.22 TRANSMISSION CHECKING OIL LEVEL......................................................................................................................................... 3.86 DRAINING AND REFILLING................................................................................................................................. 3.86

W

WINDOWS............................................................................................................................................................... 3.103 CARE OF POLYCARBONATE WINDOWS........................................................................................................ 3.103 CAUTIONS........................................................................................................................................................ 3.105 CLEANING INSTRUCTIONS........................................................................................................................... 3.104 CONCEALING HAIRLINE SCRATCHES........................................................................................................ 3.105 FIRE PRECAUTIONS....................................................................................................................................... 3.105 GRAFFITI REMOVAL........................................................................................................................................ 3.105 INSPECTION AND MAINTENANCE............................................................................................................... 3.103 RESISTANCE TO CHEMICALS....................................................................................................................... 3.104 RESISTANCE TO WATER................................................................................................................................ 3.104 CLEANING INSTRUCTIONS FOR GLASS WINDOWS.................................................................................... 3.106

3.4

Tigercat T726G Trencher

Lubrication and Maintenance

PREVENTIVE MAINTENANCE SCHEDULE

IMPORTANT! WHEELS: When installing wheels, remove all paint from the mating surfaces of both the wheel and the axle flange to ensure metal to metal contact.

NEW MACHINE MAINTENANCE

Refer to SECTION 8 of the SERVICE MANUAL for more information.

INITIAL PRE-DELIVERY INSPECTION Perform the initial pre-delivery inspection using Tigercat form numbers 5340 and 5347: PDI and 125 hour inspection report.

WARNING

FIRST 125 HOUR INSPECTION AND SERVICE REPORT With the owner's mechanic present, perform an inspection and service according to the Tigercat form numbers 5340 and 5347: PDI and 125 hour inspection report.

WARNING, HOT FLUIDS AND HOT MACHINE SURFACES CAN CAUSE SERIOUS BURNS!

This must be completed within the first 125 hour time frame.

• Before servicing the machine, allow the engine cooling system, fuel system, exhaust system, hydraulic system and machine surfaces to cool down.

IMPORTANT! To qualify for continued warranty, this report must be completed and returned to Tigercat Industries Inc. Warranty department.

• Use a thermometer to check surface and system temperatures to verify it is safe to begin service work.

TIGHTENING POINTS All hydraulic connections

• Do not begin service work until the surface or system temperature has cooled down to below 38°C (100°F)!

Hose clamps Center joint pin securing bolts Transmission securing bolts

CAUTION

Engine mounting bolts

All handles, steps and platforms must be kept free of grease, oil, fuel mud, snow ice and forest debris to prevent risk of personal injury.

Pump drive gearbox mounting bolts Axle mounting bolts Wheel retaining bolts Cab securing bolts Pin retainers Any other loose nut, bolt or fitting NOTE: Use of filters other than genuine Tigercat replacement filters is not recommended.

Refer to ENGINE OPERATION AND MAINTENANCE MANUAL and ATTACHMENT MANUFACTURER'S DOCUMENTATION for additional required maintenance at this scheduled time period.

3.5

Lubrication and Maintenance

Tigercat T726G Trencher

TIGERCAT FLUID ANALYSIS PROGRAM

TIGERCAT FLUID ANALYSIS KITS

Using the Tigercat Advanced Fluid Analysis Program on a regular basis is an excellent preventative maintenance tool.

Each kit includes a Prepaid Sample Bottle and Sample Information Form. Preprinted mailing labels are also included to ensure all samples are quickly returned directly to the lab for immediate analysis and results within 24 hours of receipt.

Studies have shown that it is possible to receive a 10 to 1 payback when looking at the amount saved on repair costs in relation to the amount invested in a scheduled fluid analysis program. Some of the benefits of a sampling program include: • Detecting problems early and before they become major catastrophic failures.

• Better ability to schedule downtime and forecast cost of repairs.

• Monitoring maintenance schedules and practices and confirming the required maintenance is being done on time.

The same type of sample bottle can be used for all types of fluid testing including Hydraulic Circuits, Final Drives, Axles, Gearboxes, Engines, etc.

To ensure accurate and meaningful results are obtained, each kit also includes detailed instructions on how to properly collect, prepare and ship the fluid samples.

Contact your Tigercat Dealer Parts Department to order kits.

• Increase used equipment value by providing proof of proper maintenance.

This Program uses the most modern technology available to analyze all fluid samples. Most test results are available within 24 hours after receipt of the sample and are supplied in an easy to understand report, which calls for specific action and makes detailed recommendations. The report is available as a mailed or faxed hardcopy, sent via e-mail or it can be viewed on the Internet.

This program will provide Tigercat machine owners access to an Advanced Fluid Analysis Program for all major machine components including Engines, Hydraulic Circuits, Axles, Final Drives, Gearboxes, etc.

Tigercat Fluid Analysis Kits are available from your Tigercat dealer parts department. If required, arrangements can also be made with your Tigercat dealer to supply and perform all of the required follow-up fluid samples.

Refer to FLUID SAMPLING PROGRAM in THIS SECTION for sample valve and drain plug locations.

700 Series Location

First Sample

Follow-up Samples

Hydraulic Oil

125 hrs

Every 1000 hrs or 6 Months

Transmission

125 hrs

Every Oil Change (500 hours or 3 Months)

Pump Drive Gearbox

125 hrs

Every Oil Change (500 hours or 3 Months)

Front and Rear Axles

125 hrs

Every Oil Change (1000 hours)

3.6

Tigercat T726G Trencher

Lubrication and Maintenance

TIGERCAT FLUID SAMPLING PROGRAM FLUID SAMPLE COLLECTION PROCEDURES Fill out the Sample Information Form (SIF) completely and accurately. When taking multiple fluid samples, fill out all of the required SIF`s in their entirety, prior to taking any fluid samples. Then, immediately package each completed SIF together with the matching fluid sample in the black outer shipping container as each individual sample is taken. This will reduce the possibility of mixing up or incorrectly identifying the SIF`s and fluid samples. Incorrectly identified samples could result in a false warning alarm.

A

The accuracy of the lab analysis results is very dependent on the quality of the fluid sample taken.

Collection of clean fluid samples that are representative of the main body of fluid are essential if meaningful lab results are to be obtained. Erroneous readings may result if proper collection, handling, packaging and shipping practices are not followed prior to the sample being tested by the lab. To be able to accurately compare and trend the lab results over time, all followup samples should be consistently taken from the same location using the same techniques as all previous samples.

700243

A Hydraulic Oil Sample Valve

• Hydraulic oil samples should be taken from the circulating oil flow at operating temperature, with no functions actuated, using sample valves that are permanently located on the machine whenever possible.

• Purge the bleed hose before taking a representative oil sample. Drain a minimum of 90 – 120 ml (3 – 4 oz) of oil into a separate container and discard this oil using approved recycling methods.

• All sample valves and drain plugs must be clean and free of debris.

• Remove the bleed hose and replace the dust cover on the sample valve immediately after taking the oil sample and sealing the sample bottle.

• Remove the dust cover from the sample valve and attach the bleed hose (supplied with the machine) to the sample valve connection.

TRANSMISSION, AXLE AND PUMP DRIVE GEARBOX SAMPLES:

• Remove the sample bottle cap only when ready to obtain the sample. Keep the cap clean – do not put it in your pocket or let it get contaminated in any way.

• These samples can be taken during the oil change process.

• To obtain a representative oil sample, the oil must be warm and must not have settled (within 30 minutes of shutdown).

• Do not allow any airborne dirt, etc., to enter the sample bottle.

• Avoid contamination of the sample – replace the sample bottle cap immediately after filling the bottle to approximately ¾ full.

• Place the required drain container under the machine to capture the used oil to be discarded using approved recycling methods.

All samples taken should be immediately forwarded to the lab for processing.

• Remove the drain plug and allow approximately 50% of the oil to drain, then place the sample bottle in the stream of draining oil to obtain a representative sample.

Contact your Tigercat dealer to purchase additional or replacement hydraulic sample valves or drain plugs.

In cases where fluid samples must be pumped or otherwise drawn out of a tank or housing, a hand operated fluid suction pump is also available from your Tigercat dealer.

3.7

Lubrication and Maintenance

Tigercat T726G Trencher

GENERAL

• When welding, secure ground connection as close to working position as possible to prevent arcing across machined surfaces or through bearings.

CAUTION

• Clean away all branches, bark and chips. Clean up all traces of oil to avoid fires.

All handles, steps and platforms must be kept free of grease, oil, fuel, mud, snow, ice and forest debris.

• Inspect the exhaust system daily for any signs of leakage. Check for worn, cracked, broken, or damaged pipes or muffler. Also check for missing or damaged bolts or clamps. Repair all exhaust leaks or defective parts immediately. Engine exhaust leaks can cause fires. Do not operate the machine until the exhaust leak is repaired.

• Clean around filler caps before checking or adding fluids.

• Always release the pilot system pressure before breaking a connection. Refer to RELEASE PILOT SYSTEM PRESSURE in SECTION 1.

• During daily operation of the machine, the occurrence of exhaust leaks are usually accompanied by a change or increase in engine exhaust noise levels. These audible warnings cannot be ignored. When exhaust leaks occur during operation, shut down the machine immediately and do not put it back to work until the necessary repairs have been completed.

• Clean around hydraulic fittings before breaking connection. Plug or cap immediately.

• Clean up spills as soon as possible.

• Always use clean oil and containers.

• Drain dirty oil while still warm.

• Always have a fire extinguisher at hand.

• Do not exceed recommended fluid levels.

• Always lower the boom to the ground when leaving the cab, leaving the machine unattended or when performing servicing procedures.

• Service all hydraulic filters after the failure of a pump, motor, cylinder or valve. Failures of this nature could contaminate the entire hydraulic system.

• Install door safety struts when working on the machine.

• Top up diesel fuel at each shift to reduce contamination by condensation.

• Check and clean the fire detection system sensors on a regular basis.

• Clean up oil spills in engine enclosure immediately.

• Before welding on machine, disconnect all electrical connections and follow all servicing safety precautions as outlined in the WELDING, PRIOR TO in SECTION 1.

* Oil Lost from leakage Lost Oil (Litres) Leakage Rate

Lost Oil (US Gallons)

Per Day

Per Month

Per Year

Per Day

Per Month

Per Year

One drop In TEN Seconds

0.424

12.72

152.0

0.112

3.36

40.0

One drop In FIVE Seconds

0.852

25.6

306.6

0.225

6.75

81.0

One drop per second

4.26

127.76

1533.1

1.125

33.75

405.0

Three Drops per Second

14.2

425.86

5110.31

3.75

112.5

1350.0

Drops Break Into Stream

90.83

2725.5

32706.0

24.0

720.0

8640.0

3.8

Tigercat T726G Trencher

Lubrication and Maintenance

CHECK EMERGENCY EXIT MONTHLY

CAB DOORS The left cab door is the primary exit. One alternate exit route is provided: • Right cab door.

The right cab door is ONLY to be used if the left cab door cannot be opened.

Check this emergency exit monthly to ensure it is fully operational.

A

700091

B

700090

A Left Cab Door – Primary B Right Cab Door – Alternate

3.9

Lubrication and Maintenance FIRE PREVENTION

Tigercat T726G Trencher FIRE EXTINGUISHER

Proper maintenance of your machine will greatly extend its life and reduce your operating costs.

A

Fire can result in a machine loss which can be financially devastating.

CAUTION After transporting (trucking) a machine from one job sight to the next, open all doors and access panels and blow off any debris that may have repositioned itself onto the engine and exhaust parts due to wind turbulence during the journey.

1. When allowed to accumulate, forest debris and fine organic material (twigs, pine needles, branches, bark, leaves, sawdust, small wood chips, etc.) and any other combustible materials form a fuel source that is extremely difficult to extinguish when ignited. A thorough program of regular cleaning and washing will reduce the possibility of a fire starting.

In the event a fire does start, the regular cleaning program will improve the chances of successfully extinguishing a fire.

2. Pay close attention to wiring and plumbing routes during maintenance. ALL wiring harnesses and hydraulic hoses must be properly restrained and clamped to prevent damage from chaffing.

3. If equipped, read the fire suppression system manual and have the system serviced regularly by qualified personnel.

4. In case of fire, lower the grapple to the ground and turn OFF the engine before discharging the fire suppression system.

T726G-010

A Charge Gauge

A portable fire extinguisher is located in operator's cab.

Check the extinguisher checked daily to ensure that it is charged. The pointer on the charge gauge should point to the green region. If the indicator falls out of this green area, service the extinguisher immediately.

Maintain a charged fire extinguisher on the machine at all times and know how to use it.

Refer to the manufacturer's use and information manual for proper usage, additional information and recommended inspection and maintenance intervals.

Refer to FIRE PREVENTION in SECTION 1 for additional information.

3.10

Tigercat T726G Trencher

Lubrication and Maintenance

SCHEDULED MAINTENANCE

WARNING

For service and replacement intervals see SERVICE AND LUBRICATION POINTS in THIS SECTION.

FREQUENTLY • Check for water in fuel filter/water separator.

• Visual engine check.

WARNING, HOT FLUIDS AND HOT MACHINE SURFACES CAN CAUSE SERIOUS BURNS!

• Check the engine cooling air intake screens for possible restriction.

• Before servicing the machine, allow the engine cooling system, fuel system, exhaust system, hydraulic system and machine surfaces to cool down.

• Check for debris, snow and ice buildup on emergency exits and remove accumulation immediately.

• Use a thermometer to check surface and system temperatures to ensure it is safe to begin service work.

• Do not begin service work until the surface or system temperature has cooled down to below 38°C (100°F)!

3.11

Lubrication and Maintenance EVERY 8 HOURS PERFORM • FREQUENTLY maintenance.

• Drain fuel filter/water separator.

• Conduct an overall visual inspection.

CHECK • Engine coolant level.

• Engine oil level at dipstick.

• Air intake precleaner.

• Air intake filter restriction indicator.

• Replace primary filter if indicator is in red zone.

• Replace secondary (safety) filter every third primary filter change to guarantee maximum performance and reliability. Air cleaner unloader valve.

• Air cleaner unloader valve.

• All engine air intake system components (including charge air cooler) rubber elbows, connector hoses, tubes and clamps for damage, hardening, wear, cracks, leaks, loose clamps or loose hanger bracket hardware and repair or replace immediately.

Tigercat T726G Trencher CLEAN • Oil cooler, engine radiator, A/C condenser and charge air cooler.

• Remove potentially damaging debris from machine.

LUBRICATE • Mid driveshaft slip joint: 1 fitting – purge.

NOTE: Lubricate slip joint with machine articulated.

• Center joint bearings: 2 fittings – purge.

• Steering cylinder ends: 4 fittings – purge.

• Boom cylinder pins (tilt and lift): 8 fittings – purge.

• Boom/link pins (lift and tilt): 10 fittings – purge.

• Quick attach locking pins (if applicable): 2 fittings – purge.

Refer to ENGINE OPERATION AND MAINTENANCE MANUAL and ATTACHMENT MANUFACTURER'S DOCUMENTATION for additional required maintenance at this scheduled time period.

• Hydraulic oil tank level.

• Pump drive gearbox oil level at dipstick.

• Transmission oil level at dipstick.

• For leakage around hydraulic components and flexible hoses.

• For loose nuts, bolts and fittings.

• Condition and tension of belts.

• Exhaust system for leaks.

* Use of filters other than genuine Tigercat replacement filters is not recommended.

3.12

Tigercat T726G Trencher

Lubrication and Maintenance

EVERY 48 HOURS

EVERY 125 HOURS

PERFORM

PERFORM

• 8 HOURS Maintenance.

• FREQUENTLY Maintenance.

CHECK

• 8 HOURS Maintenance.

• Center joint for looseness.

CHECK • Fuel fill strainer (cap screen).

Refer to CENTER JOINT– MAINTENANCE in this section for instructions. If a problem is found take corrective action immediately.

• Fluid level in batteries unless maintenance free.

• Engine speed.

Refer to SECTION 11 of the SERVICE MANUAL for more detailed checking and adjustment procedures.

Refer to ENGINE OPERATION AND MAINTENANCE MANUAL and ATTACHMENT MANUFACTURER'S DOCUMENTATION for additional required maintenance at this scheduled time period.

• All hydraulic pressures.

• Hydraulic pumps and motor securing bolts.

• Torque tightening points as per new machine maintenance.

CLEAN/REPLACE • Recirculating air filter – A/C heater unit. * • Fresh air filter – cab. *

LUBRICATE • Front driveshaft slip joint: 1 fitting – purge.

• Rear driveshaft slip joint: 1 fitting – purge.

• Parking brake shaft seals – 2 fittings (later machines).

• Rear axle oscillation pivot: 2 fittings – purge.

VISUALLY INSPECT FOR DAMAGE TO • Lift boom and tilt linkage.

• Front and rear frame.

• Center joint area.

• Attachment.

Complete repairs immediately.

VISUALLY INSPECT FOR • Frayed electrical wiring and hydraulic hoses.

• Wear in any other components.

NOTE: Neglecting the proper maintenance of these items can result in fire.

Refer to ENGINE OPERATION AND MAINTENANCE MANUAL and ATTACHMENT MANUFACTURER'S DOCUMENTATION for additional required maintenance at this scheduled time period.

* Use of filters other than genuine Tigercat replacement filters is not recommended.

3.13

Lubrication and Maintenance

Tigercat T726G Trencher

EVERY 250 HOURS

EVERY 500 HOURS

PERFORM

PERFORM

• FREQUENTLY Maintenance.

• FREQUENTLY Maintenance.

• 8 HOURS Maintenance.

• 8 HOURS Maintenance.

• 125 HOURS Maintenance.

• 125 HOURS Maintenance.

CHECK

• 250 HOURS Maintenance.

• Fire extinguisher and turn it to mix contents.

CHECK

• Parking brake oil level.

• All hydraulic pressures.

• Water system strainer.

• Torque on transmission mounting bolts.

DRAIN AND REFILL • Oil in pump drive gearbox.

• Oil in transmission.

• Oil in cutter drive gearbox.

REPLACE

• DEF fill strainer. Remove and clean particles and debris as required.

REPLACE • Hydraulic oil return filters. * • Hydraulic oil filter, drive pump charge pressure. *

• Engine oil and filter. *

• Hydraulic oil filter, attachment pump charge pressure. *

• Engine fuel filter. *

• Recirculating air filter – A/C heater unit. *

• Fuel filter/water separator filter. *

• Fresh air filter – cab. *

• DEF dosing module filter (Tier 4f machines only).

• Engine crankcase ventilation filter. * (Tier 4f machines only.)

Refer to SECTION 8 of the SERVICE MANUAL for various oil change procedures.

Refer to ENGINE OPERATION AND MAINTENANCE MANUAL and ATTACHMENT MANUFACTURER'S DOCUMENTATION for additional required maintenance at this scheduled time period.

Refer to the ENGINE MANUFACTURER'S DOCUMENTATION for replacement instructions.

LUBRICATE • Door, door screen and access cover hinges.

Refer to ENGINE OPERATION AND MAINTENANCE MANUAL and ATTACHMENT MANUFACTURER'S DOCUMENTATION for additional required maintenance at this scheduled time period.

* Use of filters other than genuine Tigercat replacement filters is not recommended.

3.14

Tigercat T726G Trencher

Lubrication and Maintenance

EVERY 1000 HOURS PERFORM • FREQUENTLY Maintenance.

• 8 HOURS Maintenance.

• 125 HOURS Maintenance.

• 250 HOURS Maintenance.

• 500 HOURS Maintenance.

CHECK • Intank fuel strainer.

• Engine serpentine belt.

• Center joint for looseness.

Refer to CENTER JOINT– MAINTENANCE in this section for instructions. If a problem is found take corrective action immediately.

Refer to SECTION 11 of the SERVICE MANUAL for more detailed checking and adjustment procedures.

• Accumulator charge valve strainer.

Refer to SECTION 5 of the SERVICE MANUAL for accumulator charge valve strainer instructions.

DRAIN AND REFILL • Oil in front and rear axles.

Refer to SECTION 8 of the SERVICE MANUAL for axle oil change procedure.

REPLACE • Air cleaner unloader valve.

LUBRICATE • Front and rear axle pinion grease seal: 1 fitting per axle – purge.

Refer to ENGINE OPERATION AND MAINTENANCE MANUAL and ATTACHMENT MANUFACTURER'S DOCUMENTATION for additional required maintenance at this scheduled time period.

* Use of filters other than genuine Tigercat replacement filters is not recommended.

3.15

Lubrication and Maintenance EVERY 2000 HOURS PERFORM • FREQUENTLY Maintenance.

Tigercat T726G Trencher REPLACE • All air intake rubber components such as elbows and connectors – High temperatures in this area can cause the rubber to harden.

• 8 HOURS Maintenance.

NOTE: High-temperature silicone connectors do not need to be replaced unless they are damaged.

• 125 HOURS Maintenance.

NOTE: Refer to AIR INTAKE SYSTEM in THIS SECTION.

• 250 HOURS Maintenance.

• 500 HOURS Maintenance.

• 1000 HOURS maintenance.

CHECK • All hydraulic system components especially cooling fan for proper operation after hydraulic oil has been replaced.

• Hydraulic oil tank breather.

Refer to ENGINE OPERATION AND MAINTENANCE MANUAL and ATTACHMENT MANUFACTURER'S DOCUMENTATION for additional required maintenance at this scheduled time period.

• Air intake precleaner.

DRAIN AND REFILL • Hydraulic oil tank with recommended hydraulic oil.

Refer to APPROVED HYDRAULIC OILS in THIS SECTION. It is strongly recommended that a program of regular oil testing be used. Oil change intervals can be established from oil test results.

Make sure the hydraulic oil type selected on the computer display matches the oil type being used.

Adjust oil type if needed. Refer to COMPUTER – ADJUSTMENT MENU – HYDRAULIC OIL GRADE SELECTION in SECTION 2 for selecting hydraulic oil type setting procedure.

NOTE: When refilling the hydraulic system, vent pumps, motors and valves of air by opening a plug or hose fitting located near or on top of the pumps, motors and valves until oil free of air is seen flowing out of the plug or hose fitting. Failure to vent air from the hydraulic system could cause serious damage to hydraulic components. Tighten plugs or fittings and clean up any spilled oil when completed.

NOTE: Changing diffuser/strainers, filters and replacing the hydraulic oil tends to aerate the oil.

For maximum pump life, do not operate the machine for one hour after servicing to allow entrained air to escape from the oil prior to applying working pressures to the pumps.

• Oil in hydraulic parking brake.

* Use of filters other than genuine Tigercat replacement filters is not recommended.

3.16

Tigercat T726G Trencher

Lubrication and Maintenance

EVERY 2 YEARS

SEASONAL

REPLACE

REPLACE

• Engine coolant. Antifreeze must comply with international specifications ASTM D-6210.

• Drain and refill hydraulic oil tank with recommended hydraulic oil if required to meet operating temperature range.

Refer to ENGINE OPERATION AND MAINTENANCE MANUAL and ATTACHMENT MANUFACTURER'S DOCUMENTATION for additional required maintenance at this scheduled time period.

Refer to APPROVED HYDRAULIC OILS in THIS SECTION.

* Use of filters other than genuine Tigercat replacement filters is not recommended.

3.17

Lubrication and Maintenance

Tigercat T726G Trencher

79647BENG

3.18

Tigercat T726G Trencher

Lubrication and Maintenance Tigercat Model T726G SERVICE AND LUBRICATION POINTS

REFER TO Tigercat OPERATOR'S MANUAL FOR FURTHER INFORMATION

ENGINE OIL AND FILTER

3

CRANKCASE VENTILATION FILTER - T4F ONLY

4

FUEL FILTER (ENGINE)

5

FUEL/WATER SEPARATOR

6

DEF DOSING MODULE FILTER - T4F ONLY

7

FUELFILL STRAINER

8

IN TANK FUEL STRAINER

CHK

REP

•

•

53

14

•

•

REP •

DRN

QTY

2000 

1500 

1000 

500 

CHANGE COOLANT EVERY 2 YEARS

CHK

USG

2

CAPACITY LITERS

COOLING SYSTEM

250 

8

1

125 

SERVICE POINTNO.

SERVICE EVERY ITEM

SEE ENGINE MANUFACTURER'S OPERATION AND MAINTENANCE MANUAL FOR REQUIRED ANTIFREEZE SOLUTION AND MIXTURE.

1 1

REP

1

REP

1

REFER TO SECTION 3 OF THE OPERATOR'S OR SERVICE MANUAL FOR DETAILS.

1

CLEAN OR REPLACE AS NECESSARY.

CHK CHK

1

DRAIN TANK, CLEAN OR REPLACE AS NECESSARY. CLEAN AS REQUIRED / INSPECT IMPELLER FOR WEAR OR DAMAGE REPLACE AS NECESSARY.

AIR INTAKE PRECLEANER

CHK

1

10

AIR INTAKE PRIMARY FILTER ELEMENT

CHK

1

11

AIR INTAKE SAFETY FILTER ELEMENT

CHK

12

AIR CLEANER UNLOADER VALVE

CHK

13

AIR INTAKE CONNECTIONS

CHK

15

REP REP REP †

HYDRAULIC OIL RETURN FILTERS

D/R ††

CHK

1

CHECK FILTER RESTRICTION INDICATOR. REFER TO 8 HOUR SCHEDULED MAINTENANCE FOR DETAILS (SECTION 3 IN MANUAL).

1

REFER TO SECTION 3 IN MANUAL.

3

CHECK FOR LOOSE CLAMPS AND DAMAGED RUBBER COMPONENTS. REPLACE RUBBER COMPONENTS.

1

BLUE WATER ABSORBING FILTER.

3

WHITE HIGH PERFORMANCE FILTER. DRAIN AND REFILL AT SEASONAL OIL CHANGE REFER TO MANUAL FOR APPROVED OILS †† CHECK USING VEHICLE DISPLAY MODULE.

16

HYDRAULIC TANK

17

HYDRAULIC TANK BREATHER

18

HYDRAULIC OIL FILTER DRIVE PUMP CHARGE PRESSURE

REP †

1

19

HYDRAULIC OIL FILTER ATTACHMENT PUMP CHARGE PRESSURE

REP †

1

A/C & HEATER FILTERS

REP †

2

20

187

49

REP †

CHK

1

21

PUMP DRIVE GEARBOX

CHK

D/R

7.7

2

22

TRANSMISSION - WideRANGE

CHK

D/R

5.7

1.5

23

AXLES: FRONT REAR

D/R D/R

26.5 24.6

7.0 6.5

24

PINION GREASE SEAL - FRONT/REAR AXLE

LUB

FRONT DRIVE SHAFT 25

MID DRIVE SHAFT

26

LUB

LUB

CENTER JOINT BEARING PRELOAD

CHK 48 

PARKING BRAKE

28

CUTTER DRIVE GEARBOX

29

ACCUMULATOR CHARGE VALVE STRAINER

30

WATER SYSTEM STRAINER

CHECK OIL LEVEL. FILL WITH MIL-L-2105C OR API-GL-5 BELOW -10ºF(-23ºC) USE 75W-90 UP TO 100ºF(38ºC) USE 80W-90 ABOVE 100ºF(38ºC) USE 85W-140 2

1

ONE FITTING PER AXLE LITHIUM BASE EP2 GREASE

LITHIUM BASE EP2 GREASE 

1 PURGE

2

LITHIUM BASE EP2 GREASE  REFER TO SECTION 3 OF THE MANUAL FOR DETAILS.

CHK

LUB

CLEAN OR REPLACE AS NECESSARY.

1 PURGE

LUB

CENTER JOINT

27

PURGE

LUB ***

REAR DRIVE SHAFT

• SEE ENGINE MANUFACTURER'S OPERATION AND MAINTENANCE MANUAL FOR PROCEDURES AND CAPACITIES.

REP •

9

14

DESCRIPTION

CHK

D/R

D/R REP

0.4

0.11

13

3.4

2

FILL WITH ML-L-2105C OR API-GL-5 LUBRICANT GRADE/WEATHER TEMPERATURE: BELOW -10ºF(-23ºC) USE 75W-90 UP TO 100ºF(38ºC) USE 80W-90 ABOVE 100ºF(38ºC) USE 85W-140 CHECK LEVEL, SEE DRUM DRIVE OPERATING INSTRUCTIONS, FILL WITH 80W - 140 SYNTHETIC OIL ONLY.

1

CHK

1

79647BENG

3.19

SHUT OFF WATER SUPPLY.

Lubrication and Maintenance

Tigercat T726G Trencher

APPROVED HYDRAULIC OILS Use one of the following oils to fill or replenish the hydraulic system.

3.20

Tigercat T726G Trencher

Lubrication and Maintenance

ARTICULATION LOCK BAR INSTALLATION

A

E

B

WARNING To prevent movement of the machine and possible injury, install the articulation lock bar before performing any work in the center joint area.

D

1. Park the machine in a straight ahead position on level ground. Refer to PARKING THE MACHINE in SECTION 1.

C

700047

Lock Bar in Stored Position

2. Remove both retaining pins from the front and rear chassis.

A

3. Slide the lock bar out of the front chassis and into the tube socket on rear chassis.

E

B

4. Line up the holes at each end of the lock bar with the holes in the chassis.

5. Secure in place with both retaining pins.

6. Install the lynch pins.

7. After work is completed, slide the lock bar into the front chassis storage position and hold in place with the retaining pin. Store second retaining pin in rear chassis tube socket. Install the lynch pins.

D

700040

A B C D E

3.21

C

Lock Bar in Locked Position

Front Chassis Rear Chassis Lock Bar Lynch Pin Retaining Pin

Lubrication and Maintenance

Tigercat T726G Trencher

TOWING INSTRUCTIONS

2. Steer the machine in a straight ahead position.

NOTE: For instructions on transporting the machine, refer to VEHICLE MOVING AND TRANSPORTING INSTRUCTIONS found in the operator's manual case in the cab.

4. Install the lift boom cylinder lock. Refer to BOOM CYLINDER LOCK in SECTION 1.

It is always better to make repairs at the point where the machine is parked whenever possible.

Towing is only recommended over short distances.

3. Raise the attachment off the ground.

5. Turn OFF the engine.

6. Install the articulation lock bar. Refer to ARTICULATION LOCK BAR INSTALLATION in THIS SECTION.

IMPORTANT! Before towing, the transmission must be placed in neutral. Never tow a machine in gear. The extremely high forces created will cause significant damage to the components of the hydrostatic drive system and the transmission.

IMPORTANT! Never tow the machine at over 3 km/h (2 mph). This will cause significant damage to the transmission.

IMPORTANT! Never press the forward or reverse pedals while the transmission is in neutral. This will cause significant damage to the transmission.

A

A

B

SM47

Steering Cylinders

A Normal Hose Connections B Hoses Cross-Connected for Towing

7. To allow the machine to steer while towing and prevent damage to the steering cylinders, cross the hydraulic hoses on one of the steering cylinders.

This will allow trapped oil to flow freely between the two steering cylinders, providing ease of turning with some dampening effect.

700479

B

700478

A Disconnect Lever – Engaged B Disconnect Lever – Neutral

1. To facilitate towing place the transmission in NEUTRAL. This disconnects the wheels from the hydraulic motor. Place a short bar through the hole in the lever and pull upwards to put the transmission into NEUTRAL as shown.

3.22

Tigercat T726G Trencher

Lubrication and Maintenance

A

G P1

P2

P2 C1

C2

C3

C4

C5

C6

C7

C8

A

700424

F

D

B

E

C

B 724G-008

C

A Pilot Manifold 'C6' Port (Parking Brake Release) B Porta Power C Parking Brake

8. This machine is equipped with a hydraulic deactivated parking brake. It is necessary to provide portable hydraulic pressure at the parking brake supply (C6) on the pilot manifold to release it. a. Block the wheels. b. Remove parking brake supply hose from the pilot manifold ('C6' Port) and connect to a remote power source.

700036 700442

A B C D E F G

Parking Brake – Hydraulically Deactivated

Parking Brake Springs Driveshaft Stationary Discs Rotating Discs Front Axle Rear Axle

c.

Plug the port on the pilot manifold.

9. Pressurize the circuit to 17 bar (250 psi) to release the parking brake.

10. Remove articulation lock bar.

11. Tow the machine from the rear, making use of the towing lugs underneath the bumper.

NOTE: Use a vehicle of equal power and size for towing.

NOTE: When going downhill, use a 'holdback' vehicle, as the machine is now without any effective braking.

12. When towing is completed, install the articulation lock bar and reconnect the steering cylinder hoses to their proper locations.

3.23

Lubrication and Maintenance

Tigercat T726G Trencher

3.24

Tigercat T726G Trencher

Lubrication and Maintenance

SERVICE COMPARTMENTS, DOORS AND ACCESS PANELS

CAUTION

REAR DOOR AND ACCESS COVERS

Always install the door safety stop when opening the rear door to perform service in the pump compartment. If not used, the door could close unexpectedly causing personal injury or component damage.

REAR ACCESS COVERS The following access covers are located at the rear of the machine:

M726E-104

• Hydraulic oil return filters and breather.

• Hydraulic oil tank clean out and access to oil diffusers.

C

• Fuel tank clean out and access to fuel strainer.

To access all components listed above, remove the three cover(s) mounting screws and remove the cover(s).

D

INNER COMPARTMENT ACCESS PANELS A

700435

A B C D

B

Rear Door – Pump Compartment Fuel Tank Cleanout and Fuel Strainer Access Cover Hydraulic Oil Return Filters and Breather Access Cover Hydraulic Oil Tank Cleanout and Diffusers Access Cover

B

The pump compartment rear door provides access to the aftertreatment system components, hydraulic pumps, hydraulic oil return filters, charge pressure filters, hydraulic oil level sight gauge, hydraulic oil hand fill pump, pump drive gearbox dipstick fuel filter/water separator and the lift boom cylinder lock.

A

726GT-034

To open the rear door, swing the latch pin stop to the side, lift up the pin and swing open the door.

C A

726GT-035

A Pilot Manifold Panel – Removable B Pilot Manifold Panel – Removable (Inside Engine Compartment) C Engine Access Panel – Removable 700222

A Door Safety Stop in Locked Position

Lift the door safety stop out of its storage position and place the safety stop bolt in hole provided in the door ledge to brace the door open.

The above panels are mirrored on the left and right side compartments of the machine. Remove the panel mounting bolts to access the pilot manifold and the front of the engine.

3.25

Lubrication and Maintenance

Tigercat T726G Trencher

RIGHT SIDE COMPARTMENTS, DOORS AND ACCESS PANELS G

F

E

D

J

C

B

A

H

I

700764

A B C D E F G H I J

Right Cab Door Cooling Fan and Motor Door – Hinged Cooling Fan and Motor Panel – Removable Engine Compartment Door – Hinged Engine Compartment Panel – Removable Fuel Fill Door – Hinged Fuel Level Sender Panel – Removable (Bolted) DEF Tank Fill Cap Door – Hinged DEF Tank Panel – Removable (Bolted) Engine Coolant Fill Cap Cover

Provides Access to: Cab – Emergency Exit, Cab Fuses and Relays Cooling Fan and Motor, Receiver-drier, XA2-A1 Expansion Module Cooling Fan and Motor, Cooling System Drain Valve Air Cleaner Engine ECU, Engine Fuel Filter, A/C Compressor Fuel Fill Cap, Dipstick, Strainer Fuel Level Sender DEF Tank Fill Cap DEF Tank (Removal) Engine Coolant Fill Cap (Surge Tank)

The right cab door is an emergency exit but also provides access inside the control panel.

The cooling fan and motor upper door is hinged. To open the door, swing the latch pin stop to the side, lift up the pin and swing open the door.

The cooling fan and motor lower panel is removable and held in place by the upper hinged door. Fully open the upper hinged door to allow the lower panel to be removed.

The engine compartment upper door is hinged. To open the door, swing the latch pin stop to the side, lift up the pin and swing open the door.

The engine compartment lower panel is removable and held in place by the upper hinged door. Fully open the upper hinged door to allow the lower panel to be removed.

The fuel fill door is hinged. To open the door lift the panel and pivot on the hinge until it rests on the pump compartment roof.

3.26

Tigercat T726G Trencher

Lubrication and Maintenance

LEFT SIDE COMPARTMENTS, DOORS AND ACCESS PANELS A

B

C

D

E

G

H

I

F

700765

A B C D E F G H I

Left Cab Door Cooler Package Door – Hinged Cooler Package Panel – Removable Engine Compartment Door – Hinged Engine Compartment Panel – Removable Engine Compartment Panel – Hinged Battery Compartment Door – Hinged Battery Disconnect Switch Door – Hinged Main Fuse and Relay Panel – Removable (Bolted)

Provides Access to: Cab – Main Point of Entry Cooler Package Cooler Package Air Filter Restriction Indicator Air Intake Tubing, Engine Oil Filter, Coolant Shut-Off Valve Engine Oil Dipstick. Engine Oil Fill Batteries Battery Disconnect Switch, Machine Booster Socket, Air Tank Drain Valve Main Fuse and Relay Panel, Air Tank

The left cab door is the main access to the cab.

The cooling package upper door is hinged. To open the door, swing the latch pin stop to the side, lift up the pin and swing open the door.

The cooling package lower panel is removable and held in place by the upper hinged door. Fully open the upper hinged door to allow the lower panel to be removed.

The engine compartment lower panel is removable and held in place by the upper hinged door. Fully open the upper hinged door to allow the lower panel to be removed. This lower panel has a hinged access door for checking engine oil level.

To access the main fuse and relay panel and the air tank, remove the panel mounting bolts.

The engine compartment upper door is hinged. To open the door, swing the latch pin stop to the side, lift up the pin and swing open the door.

3.27

Lubrication and Maintenance FRONT VALVE COMPARTMENT DOOR

Tigercat T726G Trencher To access the front valve compartment: 1. Park the machine on level ground. Refer to PARKING THE MACHINE in SECTION 1.

A

A

B

C

724E-073 700580

A Front Valve Compartment Door

The latched front valve compartment door provides access to the air tool supply quick connector and the drum water supply components.

A 'T' Handle B Lift Boom C Lift Boom Cylinder

2. Raise the attachment and install the lift boom cylinder lock. Refer to BOOM CYLINDER LOCK in SECTION 1 for instructions.

WARNING

B

A

Do not stand above or below the attachment and lift boom or between the boom and front chassis when accessing the front valve compartment.

700581

C

700582

A Air Tool Supply Quick Connector B Drum Water Supply Shut-off Valve (Electric) C Drum Water Supply Pressure Gauge

3.28

Tigercat T726G Trencher

HYDRAULIC SYSTEM NOTICE

Lubrication and Maintenance IMPORTANT! Before servicing the hydraulic system, park the machine on level ground. Refer to PARKING THE MACHINE in SECTION 1.

Tigercat does not recommend the pre-filling of spin-on filters due to the risk of damage to the hydraulic system caused by unfiltered oil. Unfiltered oil used to pre-fill filters enters directly into the hydraulic circuit. Contaminants in unfiltered oil can cause significant and costly damage to hydraulic system components.

The cleanliness of hydraulic oil cannot be guaranteed unless it is pre-filtered before use.

Use of filters other than genuine Tigercat replacement filters is not recommended. Replace filters at the recommended time intervals.

Refer to SCHEDULED MAINTENANCE in this SECTION.

WARNING

WARNING: HOT HYDRAULIC OIL AND HOT MACHINE SURFACES CAN CAUSE SERIOUS BURNS! • Before servicing the machine, allow the engine cooling system, fuel system, exhaust system, hydraulic system and machine surfaces to cool down.

• Use a thermometer to check surface and system temperatures to ensure it is safe to begin service work.

• Do not begin service work until the surface or system temperature has cooled down to below 38°C (100°F).

3.29

Lubrication and Maintenance HYDRAULIC OIL TANK

Tigercat T726G Trencher HYDRAULIC OIL LOW LEVEL SENDING UNIT A low level sending unit is installed in the tank. A message is sent to the computer display when the hydraulic oil tank level is low. The alarm light will flash and the alarm will also sound.

E

Refer to COMPUTER – MESSAGES– CRITICAL – HYDRAULIC OIL LEVEL LOW in SECTION 2.

Allowing the level to drop below the LOW limit can result in severe damage to hydraulic components.

A

B

C

D

T726G-044

A B C D E

Hydraulic Oil Tank Hydraulic Oil Level Sight Gauge Hydraulic Oil Low Level Sending Unit Hydraulic Oil Temperature Sending Unit Hydraulic Oil Return Filters

If the oil level drops, inspect the machine including all fittings and hydraulic components for leaks. Once the source of the oil loss is located and repaired, oil can be added to the tank.

HYDRAULIC OIL TEMPERATURE SENDING UNIT A temperature sending unit activates the hydraulic oil temperature gauge on the computer display main screen. A message is sent to the computer display when the hydraulic oil temperature exceeds the recommended operating range for the type of hydraulic oil in use. The alarm light will flash and the alarm will also sound.

Refer to COMPUTER – MESSAGES– CRITICAL – HYDRAULIC OIL TEMPERATURE HIGH in SECTION 2.

Located at the left rear of the machine, the hydraulic oil tank has a capacity of 187 L (49.5 US gal).

HYDRAULIC OIL LEVEL SIGHT GAUGE An oil level sight gauge, accessible through the rear door indicates the HIGH and LOW levels of the hydraulic oil.

Maintain the hydraulic oil between the HIGH and LOW level marks on the gauge label. Check oil level with all cylinders fully retracted to obtain an accurate level reading. Overfilling the tank may cause excess oil to discharge from the breather vent.

3.30

Tigercat T726G Trencher

Lubrication and Maintenance

HYDRAULIC OIL HAND FILL PUMP

E

B

A

C F D

700244

A Hand Fill Pump B Hand Fill Pump Quick Connection C Hand Fill Pump Suction Tube

The hydraulic oil hand fill pump is used for adding oil to the hydraulic oil tank. The hand pump is located on the inside of the rear service compartment door. The oil is pumped directly into the tank through the return filters.

1. Remove the suction tube from its storage position and remove the screw-on cap.

D Fill Hose Quick Connection E Fill Hose Connection to Return Manifold F Hydraulic Oil Level Sight Gauge

6. Pump the oil until the level is at the FULL mark on the tank sight glass.

Check the oil level with the cylinders fully retracted to obtain an accurate level reading.

2. Clean the tube, then insert it into the supply drum.

7. Remove the suction tube from the supply drum, wipe it clean, install the screw-on cap and place in its storage position.

3. Remove the fill hose from the storage holder and remove the quick connect cap.

8. Disconnect the fill hose from the quick connect on the hand pump.

4. Remove the rubber dust cap from the hand pump quick connect and connect the fill hose to the hand pump.

9. Wipe off any oil to prevent dust accumulation.

5. Operate the pump to fill the tank.

The pump should always be operated at a medium speed with steady motion.

10. Install the fill hose quick connect cap and place the hose end back in holder.

11. Install the rubber dust cap on the hand pump quick connection.

3.31

Lubrication and Maintenance

Tigercat T726G Trencher

REFILLING THE HYDRAULIC SYSTEM When filters are replaced, there is a nominal amount of oil loss through leakage and oil contained in the filters.

This requires a hydraulic system top-up or refill.

Before refilling, check the computer to verify which oil type is selected to ensure the same type and grade of oil is used to refill the system. This will allow the program to optimize the cooling and warning functions to best suite the oil type. Refer to COMPUTER – ADJUSTMENT MENU – HYDRAULIC OIL GRADE SELECTION in SECTION 2 for selecting hydraulic oil type setting procedure.

It is strongly recommended that a program of regular oil testing be used. Oil change intervals can be established from oil test results.

Refer to HYDRAULIC SYSTEM – HYDRAULIC OIL HAND FILL PUMP in THIS SECTION. NOTE: Changing strainers, filters and replacing the hydraulic oil tends to aerate the oil. For maximum pump life, the machine should sit for one hour after servicing to allow entrained air to escape from the oil prior to applying working pressures to the pumps.

When refilling the hydraulic system, vent pumps, motors and valves of air by opening a plug or hose fitting located near or on top of the pumps, motors and valves until oil free of air is seen flowing out of the plug or hose fitting.

Failure to vent air from the hydraulic system could cause serious damage to hydraulic components. Tighten plugs or fittings and clean up any spilled oil when completed.

Check all hydraulic system components especially the cooling fan for proper operation after hydraulic oil has been replaced.

3.32

Tigercat T726G Trencher

Lubrication and Maintenance

HYDRAULIC OIL RETURN FILTERS

D

A

B

C

700243

A B C D

Return Manifold Hydraulic Oil Return Filters (White) – Quantity 3 Water Absorbing Return Filter (Blue) – Quantity 1 Filter Restriction Pressure Switch

The return oil entering the hydraulic oil tank passes through four spin-on hydraulic oil return filters mounted on a filter head above the hydraulic oil tank. One of the filters is a water absorbing (blue) filter which is in place to assist with the removal of unwanted moisture from the hydraulic oil.

FILTER RESTRICTION PRESSURE SWITCH A filter restriction pressure switch is installed on the filter head manifold. When an oil pressure differential in excess of 1.4 bar (20 psi) is encountered at the return filters, this pressure switch closes and the Hydraulic Oil Filter Bypass icon illuminates RED on the computer display. The alarm will sound and the alarm light will flash continuously.

FILTER/DIFFUSERS SERVICE NOTE: The return filters should be checked/changed when the Hydraulic Oil Filter Bypass icon displays RED on the computer display. If the icon continues to display RED after the filters have been changed, the diffuser/strainers attached to the base of the return tubes in the hydraulic tank should be examined for possible obstruction.

Refer to HYDRAULIC SYSTEM – HYDRAULIC OIL TANK – RETURN DIFFUSER/STRAINERS in THIS SECTION. IMPORTANT! Do not use these warnings as a substitute for changing the hydraulic oil return filters at regular intervals as per SCHEDULED MAINTENANCE in THIS SECTION. This information is assuming that operating conditions and running temperatures are normal.

For service and replacement intervals refer to SCHEDULED MAINTENANCE in THIS SECTION. There is a bypass valve, preset at 1.7 bar (25 psi), built into the filter head, which will open when the filters become restricted. Before the valve is activated, a filter restriction pressure switch will cause the Hydraulic Oil Filter Bypass icon on the computer display to illuminate RED. Refer to HYDRAULIC SYSTEM – FILTER RESTRICTION PRESSURE SWITCH in THIS SECTION.

T726G-105

A

A Hydraulic Oil Filter Bypass Icon

If the Hydraulic Oil Filter Bypass illuminates RED between scheduled maintenance intervals, stop the machine and change the return filters immediately.

NOTE: The Hydraulic Oil Filter Bypass icon will illuminate YELLOW when the hydraulic oil temperature is low and the filter restriction switch is activated. Allow the hydraulic oil to warm to operating temperature and the icon should change to GREY. Refer to MACHINE PREPARATION in SECTION 2.

3.33

Lubrication and Maintenance

Tigercat T726G Trencher

FILTER CHANGE PROCEDURE – RETURN FILTERS

 O-RING GASKET A

1. Park the machine on level ground. Refer to PARKING THE MACHINE in SECTION 1.

2. Open the rear door to access the return filters.

3. Wipe clean the area around the filters and filter head.

4. Wearing eye and face protection (in case of an oil spray), unscrew the old filter.

5. Dispose of old filter and any oil properly.

B

FILTR_SEALS 2

C

A Filter Head B Gasket C Filter Element

6. Check the seating area for the gasket on the filter head and wipe it clean.

a. Remove the used gasket and clean the gasket seat in the head.

7. The new Tigercat filter is supplied with two gaskets enclosed, examine the filter head closely to determine which gasket should be used and follow the instructions to ensure proper installation.

b. Apply clean oil to the new gasket surfaces. c.

d. Screw on the new filter until the gasket makes contact.

 SQUARE SECTION GASKET

e. Tighten the filter until the top edge makes metal to metal contact with the filter head (approximately 1½ additional turns after gasket contact).

A

B C FILTR_SEALS 2

A Filter Head B Gasket C Filter Element

Install the new gasket on the inside lip of the filter.

8. Use the fill pump to raise the hydraulic oil level up to the FULL line, replacing oil lost during filter change.

9. Clean up any spilled oil.

10. Start the engine and check for leaks. Refer to STARTING ENGINE in SECTION 2.

b. Apply clean oil to new gasket surfaces.

11. Run engine at LOW speed for at least five minutes to purge any remaining air from the filter system.

Then turn OFF the engine for 15 minutes to allow air bubbles in the hydraulic oil tank to rise.

c.

12. Re-check hydraulic oil level and top-up as needed.

a. Remove the used gasket and clean the groove in the head.

Install the new gasket into the groove in the filter head.

d. Screw on the new filter until the gasket makes contact. e. Tighten the filter an additional ¾ turn.

3.34

Tigercat T726G Trencher

Lubrication and Maintenance

CHARGE PRESSURE FILTERS

A

CASE DRAIN STRAINER

B

700135

700245

A Attachment Pump Charge Pressure Filter B Drive Pump Charge Pressure Filter

The charge pressure filters are located on the output side of the attachment charge pump and the drive charge pump. The filters are mounted in the rear pump compartment. For service and replacement intervals refer to SCHEDULED MAINTENANCE in THIS SECTION. A charge pressure filter bypass switch in the filter head sends a message to the computer display when an oil flow restriction in excess of 3.5 bar (50 psi) is encountered at the drive charge filter. This pressure build up also opens the bypass valve in the filter head allowing oil to bypass the filter element and return to the hydraulic oil tank.

Refer to COMPUTER – MESSAGES– ALERT– DRIVE CHARGE FILTER BYPASS in SECTION 2.

A

A Case Drain Strainer B Bottom Access Cover

The case drain strainer is located in the bottom of the rear chassis under the engine and can be accessed by removing the bottom access cover under the chassis.

The strainer is used to filter all case drain oil from the pumps and motors before it returns to the hydraulic oil tank.

The strainer element requires no regular maintenance over the life of the machine. This element requires maintenance only in the event of damage or contamination due to a hydraulic pump or motor failure.

IMPORTANT! The case drain strainer element is NOT a filter element.

Always use the correct replacement element. Use of an incorrect (filter type) element will result in pump damage.

CHANGING THE CHARGE PRESSURE FILTERS 1. Park the machine on level ground. Refer to PARKING THE MACHINE in SECTION 1.

2. Wipe the area around the filter and head clean.

3. Place rags below to catch the spillage of oil.

4. Remove the old filter. Always wear face protection to avoid oil spray. Dispose of old filter and any oil properly.

5. Check the seating area for the gasket on the filter head and wipe it clean.

6. The new filter has an attached gasket. Apply hydraulic oil to the gasket surface.

7. Screw on the new filter until the gasket makes contact with the seat in the filter head.

8. Hand tighten filter an additional ½ turn only.

9. Start the engine and check for leaks.

B

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Lubrication and Maintenance

Tigercat T726G Trencher

HYDRAULIC OIL RETURN DIFFUSER/ STRAINERS

7. Check for a buildup of foreign materials where the diffuser/strainers screw onto the pipes and on the access cover.

8. Reinstall the diffuser/strainers using the hex on the end.

NOTE: Repair any burrs created when removing the diffuser/strainers before reinstalling.

9. Reinstall the access cover with a new O-ring.

10. Refill the hydraulic tank and check for leaks.

Refer to HYDRAULIC OIL HAND FILL PUMP and REFILLING THE HYDRAULIC SYSTEM in THIS SECTION. 11. Bleed air from the main, attachment and fan pumps by loosening the case drain hose fittings at each pump connection.

12. Continue filling hydraulic oil tank using fill pump.

Tighten case drain hose fittings to pumps when oil is seen coming from the pump case drain ports. It is important that all air is evacuated from the pumps.

A

B

C

700494

13. Fill hydraulic oil tank up to the FULL mark on the sight gauge using fill pump.

A Hydraulic Oil Return Diffuser/Strainers B O-Ring – Access Cover C Hydraulic Oil Tank Cleanout and Diffusers Access Cover

There are two reusable diffuser/strainers fitted to the return tubes inside the hydraulic oil tank. Inspecting, changing or cleaning the diffuser/strainers is only to be performed in the event of a catastrophic pump or motor failure or hydraulic oil contamination.

CHANGING OR CLEANING THE DIFFUSER/ STRAINERS This procedure should only be performed in the event of a pump or motor catastrophic failure or hydraulic oil contamination.

IMPORTANT! ALL CYLINDERS MUST BE FULLY RETRACTED when filling the hydraulic oil tank or overfilling will occur.

14. Recheck hydraulic oil level and add hydraulic oil up to FULL mark using the fill pump.

NOTE: Changing diffuser/strainers and filters and replacing the hydraulic oil tends to aerate the oil. For maximum pump life, the machine should sit for one hour after servicing to allow entrained air to escape from the oil prior to applying working pressures to the pumps.

1. Park the machine on level ground. Refer to PARKING THE MACHINE in SECTION 1.

2. Remove the magnetic drain plug in the bottom of the hydraulic oil tank and drain the hydraulic oil into a suitable container.

3. Remove any build-up of metal filings from the magnetic drain plug.

4. Remove the access cover and O-ring.

5. Before removing the diffuser/strainers, clean any debris from the bottom of the tank and wipe it clean.

6. Remove the hydraulic oil return diffuser/strainers using the hex on the end of diffuser. Carefully clean the diffuser/strainers (they are easily damaged by rough handling).

3.36

Tigercat T726G Trencher

Lubrication and Maintenance

AIR CONDITIONING SYSTEM

CONDENSER

All service work must be performed by a certified A/C technician. Charge the system with R134a refrigerant only. Polyalkylene Glycol (PAG) oil should be present in the system and must be used on O-rings and fittings.

The condenser is part of the cooler package. It changes the high-pressure refrigerant vapour to a liquid.

A/C SYSTEM TOTAL CAPACITIES R134a REFRIGERANT

1.7 kg (3.75 lb)

PAG Oil

320 ml (10.8 oz)

When replacing air conditioning system components, it is important to replace PAG oil that has been lost when parts are changed. The total amount of PAG oil added to compensate for replacement components should not exceed the total capacity. Low PAG oil levels can starve the compressor for PAG oil and lead to compressor failure. Too much PAG oil can hurt the cooling performance.

Refer to CLEANING COOLER PACKAGE in THIS SECTION for the location of the condenser.

The vapour is condensed to a liquid because of the high pressure that is driving it in, and this generates a great deal of heat. The heat is then removed from the condenser by air flowing through the condenser on the outside.

RECEIVER-DRIER A B

IMPORTANT! It is recommended that during cold weather when the A/C system is not in use, that it be run for a period of five minutes every two weeks. This will circulate oil to all components of the A/C system.

C

700003

COMPONENTS COMPRESSOR

700233

A Moisture Indicator B Sight Glass (Indicates Condition of Charge) C Binary Switch A

The receiver-drier is located on the right side of the machine behind the cab.

Refrigerant flows from the condenser through the receiver-drier which contains a desiccant that removes water and other impurities from the refrigerant.

700127

A A/C Compressor

The compressor draws in the low-pressure refrigerant vapour from the A/C system.

The compressor is powered by the serpentine belt.

When the A/C system is turned on, the compressor clutch engages and the compressor pumps refrigerant vapour under high pressure to the condenser.

The compressor and charge ports are accessed through the right side engine compartment.

3.37

Lubrication and Maintenance EVAPORATOR CORE, HEATER CORE AND BLOWERS

Tigercat T726G Trencher FILTER, CAB FRESH AIR A

A

700235

700005

A B C D

C

D

B

Blower Fans Heater Core Evaporator Core Expansion Valve

C

The evaporator, heater core and blowers are part of the A/C heater unit located in the cab to the right of the operator's seat.

EXPANSION VALVE The expansion valve removes pressure from the liquid refrigerant so that it can expand and become refrigerant vapour in the evaporator.

CAB AIR FILTERS FILTER, RECIRCULATING AIR – A/C HEATER UNIT A

B

T726G-009

A Air Filter Cover B Fresh Air Filter – Cab C Filter Retainer

The filter is located in the rear of the cab roof and accessible from outside the cab.

Remove the six bolts securing the cover. Remove two bolts retaining the filter. This will provide access to the filter.

Clean or replace both filters every 125 hours. The recirculating air filter and the cab fresh air filter may require cleaning more frequently under extreme operating conditions.

700071

A Recirculating Air Filter

The filter is located at the base of the A/C heater unit.

Remove the two thumb screws on the filter box cover to access the filter.

3.38

Tigercat T726G Trencher INSPECTION Perform the following inspection along with the 125 HOURS inspection outlined in SCHEDULED MAINTENANCE in THIS SECTION.

Lubrication and Maintenance 11. Check the color in the moisture indicator: BLUE is OK; PINK indicates desiccant material in dryer is saturated with moisture.

In the latter situation: a. Replace the receiver-drier.

1. Check A/C recirculating and cab fresh air filters in the cab. Refer to AIR CONDITIONING SYSTEM– CAB AIR FILTERS in THIS SECTION.

b. Evacuate the system. c.

2. Check the condenser core for dirt and debris.

Clean as required. Refer to CLEANING COOLER PACKAGE in THIS SECTION.

CAUTION If using pressurized water or compressed air for cleaning, use at 2 bar (30 psi) or less.

Always use personal protective equipment (safety glasses) to guard against flying debris.

3. Check the evaporator coil, located inside the A/C heater unit, for dirt and debris. Also check the inside of the A/C heater unit. Clean as required.

4. With the engine stopped, check the air conditioner compressor belt tension and condition.

Recharge the system with both refrigerant and PAG oil *.

* Indicates these repairs must only be carried out by a certified A/C technician.

For additional SERVICE information refer to the Tigercat A/C SERVICE MANUAL part number 18795A, available from Tigercat parts department.

IMPORTANT! It is recommended that when the A/C system is not in use (during cold weather), that it be run for a period of five minutes every two weeks. This will circulate oil to all components of the A/C system.

The air conditioner circuit uses a binary switch (located on the top of the receiver-drier) on the high pressure side. The switch has two settings: • The high pressure protection triggers at 27 bar (391 psig) for rising pressure and 21 bar (304 psig) for falling pressure.

Refer to AIR CONDITIONING SYSTEM– SERPENTINE BELT in THIS SECTION.

• The low pressure protection triggers at 1.9 bar (29 psig) for falling pressure and 2 bar (30 psig) for rising pressure.

5. Check all A/C hoses for kinks.

6. Run the air conditioning system for three to five minutes.

7. Use a thermometer to check the air temperature exiting vents in the cab.

8. Listen to the compressor and blower motor for abnormal noises.

9. Verify the compressor clutch engages.

10. Inspect the sight glass on the receiver-drier with the A/C ON. A constant stream of bubbles indicates the system is low on refrigerant and requires charging *.

Refer to AIR CONDITIONING SYSTEM– RECEIVER-DRIER in THIS SECTION.

3.39

Lubrication and Maintenance

Tigercat T726G Trencher

SERPENTINE BELT B

C

A

D

E

470-05

A B C D E

Serpentine Belt A/C Compressor Alternator Water Pump Pulley Belt Tensioner

The serpentine belt is automatically tightened by a spring loaded tensioner. Check the belt for signs of incision, cracks, excessive wear in grooves and signs of end or surface grinding every 1000 hours.

Refer to ENGINE OPERATION AND MAINTENANCE MANUAL for inspection and replacement information for the serpentine belt.

3.40

Tigercat T726G Trencher

Lubrication and Maintenance

FAN CONTROL

The temperature sensor in the hydraulic oil tank operates in a similar manner to the engine coolant temperature sensor but independently and with a different temperature range. The hydraulic oil temperature range depends on the type of hydraulic oil used.

A

This sensor will signal the electronic control module to turn the fan ON at the minimum set point temperature.

As the temperature of the hydraulic oil increases, the speed of the fan also increases to a maximum of 2375 rpm fan speed at 1850 rpm engine speed. At this point, the temperature of the hydraulic oil will be at the maximum set point or higher.

COOLING SET POINT

700233

Charge Air Min

60°C (140°F)

Charge Air Max

82°C (180°F)

Engine Coolant Min

90°C (195°F)

Engine Coolant Max

95°C (203°F)

Hydraulic Oil Temp values depend on type of oil used.

When the switch is in the AUTO position and the fan is stopped due to low engine coolant, air intake or hydraulic oil temperatures; turning ON the A/C will immediately set a 1200 rpm fan speed at 1850 rpm engine speed. This is to ensure that sufficient air flow is available for the cab A/C even while the machine is still warming up.

B T726G-055

CAUTION

C

Before placing the fan switch in the CLEAN (PURGE) position, make sure there are no personnel on the left side of the machine in the area where the fan will expel debris.

D E

724G-011

A B C D E

XA2-A1 Expansion Module Fan Switch Full On Auto Clean (Purge)

The fan consists of an electronic XA2 expansion module, and a three position fan switch in the operator's cab with CLEAN/AUTO/FULL ON positions for fan control.

When the engine coolant temperature reaches 90°C (195°F), the sensor on the engine, in conjunction with the electronic control module, sends a signal to the control valve to start to turn the fan slowly. The fan speed is variable from zero to 2375 (+/- 25) rpm at 1850 rpm engine speed. As the temperature of the coolant increases so does the speed of the fan up to the maximum 2375 rpm fan speed at 1850 rpm engine speed. At this point, the engine coolant temperature will be 95°C (203°F) or higher.

When the switch is in the FULL ON (OVERRIDE) position, the fan will run at FULL speed for cooling regardless of coolant, air intake or oil temperatures. The AUTO CLEAN/REVERSE feature will not function in the FULL ON position.

When the switch is pressed momentarily to the CLEAN (PURGE) position, the control module will signal the control valve to reverse the flow of oil to the motor and turn the fan in reverse. The control module will also turn the air conditioning system OFF for as long as the fan switch is in the CLEAN (PURGE) position.

Refer to COMPUTER – ADJUSTMENT MENU – FAN CLEAN FREQUENCY and FAN CLEAN DURATION in SECTION 2 to make adjustments.

3.41

Lubrication and Maintenance

Tigercat T726G Trencher

FUSES AND RELAYS Each major circuit on the vehicle is protected against current overload by fuses. The fuses and relays are located in two places on the machine.

FUSE AND RELAY PANEL – CAB The fuses, diodes, resistors and relays are located in the compartment just below the instrument panel.

3.42

Tigercat T726G Trencher

Lubrication and Maintenance

FUSE AND RELAY PANEL – BATTERY DISCONNECT SWITCH COMPARTMENT The main fuse and relay panel is located in the electrical box in the battery disconnect switch compartment in the left rear corner of the machine.

T726G-016

ECU RELAY

For Tier 4f machines equipped with ECU relay (4), remove the relay and replace with jumper wire P/N 55A. Affix label P/N 55150A beside the main panel label (Product Support Bulletin Number 2467).

Tier 2 machines do not require replacement of the relay but some machines may have the jumper wire installed.

3.43

Lubrication and Maintenance

Tigercat T726G Trencher

ENGINE DIAGNOSTICS CONNECTION

A

T726G-021

A Engine Diagnostics Connection

The engine diagnostics connection is located in the compartment just below the instrument panel.

Plug a remote electronic diagnostic device into this connection such as a laptop computer with appropriate engine manufacturer’s programming to perform engine performance analysis and tuning.

IMPORTANT! This operation can only be performed by a trained service technician.

3.44

Tigercat T726G Trencher

Lubrication and Maintenance

BATTERY CARE Tigercat uses two types of batteries dependant on the machine application, model and design.

• Absorbed Glass Mat (AGM) • Flooded Lead Acid (FLA).

NOTICE Before charging the battery, it is important to identify which type of battery you have.

Always read and follow the battery and charger manufacturer's instructions prior to connecting or charging a battery.

All batteries are sensitive to overcharging. Charging or maintaining AGM batteries requires the use of a smart charger with an AGM setting. The peak charging voltage for AGM batteries varies slightly between battery manufacturer's. Exceeding this voltage can cause permanent battery damage. Refer to the BATTERY MANUFACTURER'S charging instructions for more information.

Refer to BATTERY MANUFACTURER'S instructions for charging or maintaining FLA batteries.

3.45

Lubrication and Maintenance

ENGINE FILTERS – REMOVE AND REPLACE IMPORTANT! Failure to service and replace engine filters at the proper intervals specified in the ENGINE OPERATION AND MAINTENANCE MANUAL could cause damage to the machine and result in the product warranty becoming null and void. Check the Tigercat parts catalogue for replacement filters.

Refer to the ENGINE OPERATION AND MAINTENANCE MANUAL for the oil and fuel filter replacement procedure. Read and understand the SAFETY section in each of THESE MANUALS.

ENGINE OIL FILTER

Tigercat T726G Trencher When installing a new oil filter, do not pre-fill with engine oil as this may result in engine damage. This type of failure is not warrantable by the engine manufacturer.

For service and replacement intervals refer to SERVICE AND LUBRICATION POINTS in THIS SECTION. Refer to ENGINE OPERATION AND MAINTENANCE MANUAL for more detailed information.

FUEL FILTERS These engines use filters with a very fine micron rating.

If the fuel supply is dirty, the fuel filter must be replaced more frequently than recommended in SCHEDULED MAINTENANCE in THIS SECTION. Operating the machine with a clogged fuel filter will result in low engine power. It is also recommended to drain the fuel filter/ water separator bowl daily.

NOTICE

A 700034

A

Tigercat does not recommend the pre-filling of spin-on filters due to the risk of damage to the fuel system caused by unfiltered fuel. Unfiltered fuel used to pre-fill filters enters directly into the fuel circuit. Contaminants in unfiltered fuel can cause significant and costly damage to fuel system components. The cleanliness of fuel cannot be guaranteed unless it is pre-filtered before use.

Use of filters other than genuine Tigercat replacement filters is not recommended. Replace filters at the recommended time intervals.

Refer to SCHEDULED MAINTENANCE in THIS SECTION. To prolong the operating life of the fuel filter, the fuel supply storage tank must be clean and free of water and the fuel must be pre-filtered prior to adding it to the machine.

700246

A Engine Oil Filter

The engine oil filter is located on the left side of the engine.

3.46

Tigercat T726G Trencher

Lubrication and Maintenance 1. Park the machine on level ground. Refer to PARKING THE MACHINE in SECTION 1.

A

2. Allow machine to cool.

3. Wipe clean the area around the filter and head.

4. Place rags below to catch the spillage of fuel.

WARNING

Drain fuel filter into a container and dispose of all fluids properly.

700129

5. Wearing face protection (in case of a fuel spray) unscrew the old fuel filter. Dispose of any fuel and the fuel filter properly.

6. Check the seating area for the O-ring on the filter head and wipe clean.

7. Lubricate the O-ring on top of the new filter with clean engine oil. Do not pre-fill the new filter.

A

8. Screw the new filter onto the filter head as specified by the filter manufacturer. Note: Mechanical over tightening can damage the filter element.

9. Prime the fuel system using the hand primer on the remote fuel filter/water separator before starting the engine.

700126

Loosen the plug on the top of the remote fuel filter/ water separator. Pump the hand primer until fuel begins to seep out around the loosened plug.

Continue to pump until no air bubbles are visible (approximately 30 pumps). Tighten the plug. Pump the hand primer 30 more times.

A Engine Fuel Filter

The engine fuel filter is located on the right side of the engine.

WARNING The fuel pump high-pressure fuel lines and fuel rail contain very high pressure fuel. Do not loosen any fittings while the engine is running.

Personal injury and property damage can result.

10. Start the engine and check for leaks. Refer to STARTING ENGINE in SECTION 2.

3.47

Lubrication and Maintenance

Tigercat T726G Trencher

FUEL FILTER/WATER SEPARATOR B

A

C

D T726G-114

Machine Serial Numbers 726T0501 – 726T0502

A

B

C

D

700088

A B C D

Machine Serial Numbers 726T0503 – 726T0600

Vent Plug Hand Primer Fuel Filter/Water Separator Drain Tap

3.48

Tigercat T726G Trencher

Lubrication and Maintenance

DRAINING FUEL FILTER/WATER SEPARATOR C

1. Park the machine on level ground. Refer to PARKING THE MACHINE in SECTION 1.

2. Wipe clean the area around the filter and head.

D

3. Place a suitable container under the filter and/or place rags below to catch the spillage of fuel.

B

4. Loosen the metal vent plug on the filter head.

5. Turn the drain valve open on the separator bowl to allow the fuel to drain completely from the separator bowl into a suitable container.

A

NOTE: A drain hose can be attached to the drain valve if required.

B E H

6. Close the drain valve.

The fuel filter/water separator is a combination unit, with a replaceable fuel filter and a removable water sediment bowl on the bottom of the unit. The water sediment bowl is only replaced if it becomes damaged or nonfunctional. For service and replacement intervals, refer to SERVICE AND LUBRICATION POINTS in THIS SECTION.

F

G WATER SEPARATOR3

Machine Serial Numbers 726T0501 – 726T0502

A B C D E F G H

Fuel Filter/Water Separator O-Ring Hand Primer Pump Vent Plug Water/Sediment Bowl Bowl Drain Plug Harness (Heater Element not shown) Sensor, Water in Fuel Heater A

B

C

I

E

H 822D-025

A B C D E F G H I

D

F G

Machine Serial Numbers 726T0503 – 726T0600

O-Ring Hand Primer Pump Vent Plug Filter Head Fuel Filter Harness (Heater Element not shown) Sensor, Water in Fuel Heater Drain Valve with Hose Barb Separator Bowl

3.49

Lubrication and Maintenance

Tigercat T726G Trencher

CHANGING FUEL FILTER/WATER SEPARATOR Refer to SCHEDULED MAINTENANCE and SERVICE AND LUBRICATION POINTS in THIS SECTION for filter replacement intervals.

WARNING To lower the risk of causing accidental fires, do not leave fuel or oil soaked rags laying around.

1. Park the machine on level ground. Refer to PARKING THE MACHINE in SECTION 1.

WARNING

2. Drain the fuel from the filter/water separator as described previously in this section.

3. Disconnect the fuel heater and the 'water-in-fuel' sensor from their respective wiring harness.

Drain fuel filter into a container and dispose of all fluids properly.

A

FUEL HEATER

801168 802236

A Filter Removal Tool (BH859)

4. Remove the water separator bowl from the filter head.

NOTE: A bowl wrench is supplied with the machine (Tigercat Part Number: BH859).

5. Dispose of any fuel properly .

A

6. Remove and discard the O-ring from the top of the separator bowl.

7. Clean the separator bowl.

8. Remove the filter cartridge from the filter head (pressure fit) and discard properly.

B

9. Place the new filter into position on the filter head.

10. Lubricate the O-ring with clean engine oil and install at the top of the separator bowl.

11. Install (screw) separator bowl onto the filter head, hand tighten, then turn an additional 3⁄4 turn only.

12. Reconnect the fuel heater and the 'water-in-fuel' to their respective wiring harness.

13. Turn the ignition key switch to the ON position to energize the fuel supply shut-off solenoid valve.

700088

A Fuel Filter/Water Separator B Fuel Heater (Bottom of Clear Bowl)

The fuel heater is incorporated into the fuel filter/water separator and is controlled electronically by the engine ECU.

14. Prime the fuel system using the hand primer until fuel spills out the metal vent plug.

15. Close the vent plug.

16. Start the engine and check for leaks. Refer to STARTING ENGINE in SECTION 2.

3.50

Tigercat T726G Trencher

Lubrication and Maintenance

FUEL TANK COMPONENTS

A

FUEL FILL CAP D

S≤15 mg/kg

B

C

ULTRA LOW SULFUR FUEL ONLY 36686AUNI R0

E

A

B

F

G

718E-037

A Dipstick B Fuel Fill Strainer

700146

A B C D E F G

Fuel Tank Fuel Fill Cap Fuel Level Sender Fuel Level Sender Panel Dipstick Fuel Fill Strainer Fuel Fill Door

A dipstick and a fuel fill strainer are located under the fuel fill cap. The dipstick slides through a hole in the side of the strainer. Do not drop the dipstick into the filler tube or it will punch a hole in the bottom of the strainer.

Remove and clean the fuel fill strainer every 125 hours.

Replace the fuel fill strainer if damaged.

The fuel tank is located at the right-rear corner of the machine. The fuel tank has a usable capacity of 552 L (146 US gal). The fuel fill cap is located under a hinged fuel fill door on the top of the tank. The fuel level sender is located under the fuel level sender panel on the top of the tank. The fuel level sender sends a signal to the computer which displays an on-screen fuel level gauge.

3.51

Lubrication and Maintenance

Tigercat T726G Trencher

FUEL TANK STRAINER

A

700448

A Fuel Tank Drain Plug D

C

B

A

700447

A B C D

Strainer Fuel Tank O-Ring Fuel Tank Cleanout and Fuel Strainer Access Cover

The fuel tank strainer is threaded onto the inlet pipe of the engine fuel feed line, located inside the bottom of the fuel tank.

CHANGING OR CLEANING THE STRAINER 1. Park the machine on level ground. Refer to PARKING THE MACHINE in SECTION 1.

4. Remove the fuel tank drain plug in the bottom of the tank and drain the fuel into a suitable container.

5. Remove the round fuel tank clean-out cover plate and O-ring from the access hole. Discard the O-ring.

6. Remove the fuel strainer using the hex collar on the end of strainer.

7. Clean any debris from the fuel tank and wipe all accessible surfaces clean.

8. Clean the strainer carefully (it can easily be damaged by rough handling).

9. Check for a buildup of foreign materials where the strainer threads on to the pipe and elbow.

10. Reinstall the strainer.

2. Install the articulation lock bar. Refer to ARTICULATION LOCK BAR INSTALLATION in THIS SECTION for instructions.

11. Reinstall the fuel tank cover plate with a new O-ring.

3. Block the wheels.

13. Turn ON the battery disconnect switch.

12. Refuel and check for leaks.

14. Check that all personnel are clear of the machine before starting engine.

15. Sound horn to warn personnel of machine start-up 16. Start the engine.

17. Check for leaks again.

3.52

Tigercat T726G Trencher

Lubrication and Maintenance

REFUELLING PROCEDURE

B

WARNING

Do not refuel while smoking or while near an open flame or sparks.

A

700449

S≤15 mg/kg ULTRA LOW SULFUR FUEL ONLY 36686AUNI R0

1. Park the machine on level ground. Refer to PARKING THE MACHINE in SECTION 1.

A Fuel Nozzle Holding Bracket B Fuel Fill Cap

5. Before climbing onto the machine to refuel, secure the fuel nozzle in the fuel nozzle holding bracket.

2. Allow machine to cool.

6. Once safely on the machine open the hinged fuel fill door on top of the fuel tank and clear any debris from around the fuel fill cap.

3. Clear obstructions from steps and handles needed to access the fuel tank.

7. Remove fuel fill cap slowly to allow pressure to escape from the tank.

4. Attach a grounding strap to an unpainted metal surface on the machine if the refuelling tank or nozzle is so equipped.

8. Inspect fuel fill cap gasket.

9. Inspect fuel strainer located under the fuel fill cap for debris or damage.

10. Fill the tank until the fuel level reaches the bottom of the fuel fill strainer. Do not leave the fuel nozzle unattended or spillage may occur.

11. When refuelling is complete, place the fuel nozzle back in the holding bracket.

12. Install the fuel fill cap hand-tight. Close the hinged fuel fill door.

13. Climb off the machine.

14. Remove the fuel nozzle and ground strap (if applicable).

NOTE: Before restarting the machine, refer to STARTING ENGINE in SECTION 2.

3.53

Lubrication and Maintenance

Tigercat T726G Trencher

AIR INTAKE SYSTEM

HOW IT WORKS

ENGINE AIR PRECLEANER

1. Dirty air (A) enters the precleaner, which is clamped onto the engine air intake.

2. Specially-designed vanes (B), curved and angled to precisely direct air flow, move the dirty air toward the stainless steel impeller (C).

A

3. The dynamically balanced, one piece impeller (C) (only moving part) creates a tornado inside the housing.

4. The centrifugal force of the tornado expels the heavier than air dirt particles (D), chaff, dust, snow, rain, etc., out the discharge louvre.

T726G-054

A Engine Air Precleaner – Top of Engine Compartment

The engine air precleaner cleans engine air before it reaches the air cleaner filter elements. It removes contaminants such as dust, powder, insects, rain and snow. This precleaner is self powered and self cleaning requiring virtually no maintenance.

5. Cleaned air (E) enters the engine air cleaner intake pipe, and the filter element has only the very light particles to remove.

AIR INTAKE TUBING AND JOINTS A B

IMPORTANT! Check the precleaner every 8 hours for foreign materials that may have plugged the intake area or the discharge louvre area. Clean as required.

C

A plugged precleaner will create a restriction to airflow, resulting in reduced engine performance and increased fuel consumption.

If the machine is operated with a plugged precleaner, excessive air intake restriction will damage the rubber air intake tube which will lead to ingestion of dirt into the engine resulting in engine failure. The air intake filter restriction indicator may not function properly if the air intake tube is damaged.

C

C D

B A E

480-017

A B C D E

D C

700033

A B C D

Precleaner Air Cleaner Air Intake Rubber Elbows Air Intake Tube

Check all air intake system components, rubber elbows, connector hoses, tubes and clamps every eight hours for damage, hardening, wear, cracks, leaks, loose clamps or loose hanger bracket hardware and repair or replace immediately.

Replace all air intake rubber components such as elbows and connectors every 2000 hours. High temperatures in this area can cause the rubber to harden.

NOTE: High-temperature silicone connectors do not need to be replaced unless they are damaged.

Dirty Air Specially-designed Vanes Stainless Steel One Piece Impeller Foreign Particles Cleaned Air

3.54

Tigercat T726G Trencher

Lubrication and Maintenance

AIR CLEANER

NOTE: Replace secondary (safety) filter every third primary filter change.

The most common and most damaging air intake servicing problems are over servicing and improper servicing.

OVER SERVICING Filter elements increase in dust cleaning efficiency as dust builds up on the media. Looks can be deceiving. A filter that is dirty is actually more efficient than one that is clean. A filter with dust build up on the media reaches nearly 100% dust cleaning efficiency. Only when a filter is so clogged with dirt that air restriction goes beyond the engine manufacturer’s guidelines, should be replaced.

A B

IMPROPER SERVICING

700242

Engine exposure to dust during servicing is the largest single factor contributing to engine damage due to dust. Abrasive dust can easily enter the intake system once the air cleaner element has been removed for replacement. The safety element reduces the risk, however it must also be replaced at every third primary element change.

A Air Cleaner B Air Cleaner Unloader Valve

B

IMPORTANT STEPS TO FOLLOW WHEN CHANGING FILTER ELEMENTS 1. Release the cover latches gently to reduce the amount of dust dislodged.

2. Avoid dislodging dust from filter element(s) by gently pulling the element out of the housing.

3. Check your old filter sealing surfaces, This will help detect foreign material on the sealing surface that is causing leakage.

NOTE: Do not clean and reuse filter elements.

Cleaning causes dust to bypass the filter and be deposited on the inner surface of the filter media.

The dust is then drawn directly into the engine.

A 800069

A Primary Element B Secondary (Safety) Element

The air cleaner on this machine uses two filter elements, a primary element and a secondary (safety) element. It is accessible through the service compartment access door on the right side of the machine.

To ensure maximum engine protection, it is important the elements be serviced correctly and at proper servicing intervals.

In addition to the SCHEDULED MAINTENANCE in THIS SECTION, the following instructions should also be noted:

4. Always clean the inside of the housing.

5. Always clean the sealing surface before inserting a new filter element.

6. Inspect the new filter for damage.

7. Insert the new filter properly. Apply pressure to the filter frame not the pleated filter surface.

8. Check connections hoses and tubes for an air tight fit. All clamps, bolts and connections must be tight.

Check rubber elbows for splits or wear points. Leaks in these locations send dust directly to the engine.

3.55

Lubrication and Maintenance FILTER RESTRICTION INDICATOR

B

Tigercat T726G Trencher AIR CLEANER UNLOADER VALVE

A

A 700216

A Air Filter Restriction Indicator B Air Filter Restriction Sensor

A filter restriction indicator is connected to the outlet side of the air filter. Service to the air filter is required when the restriction indicator shows RED. This indicator provides a continuous reading whether the engine is running or is shut down. After servicing the filter, reset the indicator by pressing the reset button.

AIR FILTER RESTRICTION SENSOR

Engine Air Intake Filter Restricted. Service Machine to correct.

700242

A Air Cleaner Unloader Valve

Check the rubber air cleaner unloader valve on the air cleaner housing every 8 hours. If this valve is missing, damaged or has become hard, it will cause the air cleaner to become ineffective.

Replace the unloader valve every 1000 hours.

Remove the unloader valve from the tube of the air cleaner housing. A good valve should be soft and flexible. Check and clean the valve. If it is plugged, check the filter elements as they may also need to be replaced. Reattach the valve to the tube. The valve should suck closed at about one-third of HIGH speed.

When operating in high dust conditions this valve should be checked and squeezed every two hours to release dust buildup.

Refer to AIR INTAKE SYSTEM– AIR CLEANER UNLOADER VALVE in THIS SECTION.

The machine is also equipped with an engine air filter restriction sensor which sends a signal to the computer in the event of filter restriction.

Refer to AIR INTAKE SYSTEM– OVER SERVICING and AIR INTAKE SYSTEM– IMPROPER SERVICING in THIS SECTION. Refer to COMPUTER – MESSAGES– ALERT– ENGINE AIR INTAKE FILTER RESTRICTED in SECTION 2.

3.56

Tigercat T726G Trencher

Lubrication and Maintenance

DRUM WATER SPRAY SYSTEM WATER SPRAY SYSTEM COMPONENTS The water spray system consists of a 1154 L (305 US gal) tank, manifold, shut-off valves, strainer, electric pump, relief valve, pressure gauge, six nozzles, hoses and fittings, clamps and brackets. System pressure is set at 2.8 bar (40 psi) with a flow of 12 L/m (3 US gpm).

J

J

J

J

J

J

D

A

E

C

B

I

G

F

H

726GT-019

A B C D E

Water Tank Water Tank Fill Connection Water Tank Fill Shut-off Valve Water Supply Shut-off Valve Water Supply Strainer

F G H I J

3.57

Pressure Gauge Water Supply Pump Relief Valve Shut-off Valve (Electric) Water Spray Nozzles on Attachment

Lubrication and Maintenance

Tigercat T726G Trencher

WATER TANK

WATER SUPPLY SHUT-OFF VALVE AND STRAINER A

A

B

700247 700249

A Water Tank

The water tank is mounted on top of the rear chassis.

WATER TANK FILL CONNECTION B

A Water Supply Shut-off Valve B Water Supply Strainer

The water supply shut-off valve is located in the cooler package compartment on the left side of the machine.

It is used to turn the water supply to the drum ON and OFF. A strainer located just below the shut-off valve is provided to filter out any particles in the water supply.

A

A

700248

A Water Tank Fill Connection B Water Tank Fill Shut-off Valve

The water tank fill connection is located in the rear pump compartment. A standard garden hose can be connected to the fill connection to fill the tank. A shut-off valve is provided to open the fill hose connection when filling the tank and to close the connection when the tank is full.

T726G-064

A Strainer

Check the strainer every 250 hours.

1. Turn the water supply shut-off valve off.

2. Unscrew the strainer bowl from the housing and remove the bowl and strainer.

3. Clean the bowl and strainer and reinstall them back on the housing.

3.58

Tigercat T726G Trencher

Lubrication and Maintenance

WATER SUPPLY PUMP AND RELIEF VALVE A

WATER SPRAY NOZZLES

C

B

A T726G-076

T726G-075

T726G-089

A Pressure Gauge B Relief Valve C Water Pump

The water supply pump and relief valve are located in the front chassis hydraulic valve compartment. The water supply pump is on the left side and the relief valve is on the right side.

The relief valve is equipped with a pressure gauge.

The water pressure is set at 2.8 bar (40 psi) with a flow of 12 L/m (3 US gpm). To adjust the pressure turn the relief valve adjuster IN to increase pressure or OUT to decrease pressure.

SHUT-OFF VALVE (ELECTRIC)

B T726G-090

A Right and Left Side Plate Water Spray Nozzles B Top Water Spray Nozzles

There are six water spray nozzles mounted on the cutter head. Two nozzles each are located on the right and left side plates. Two nozzles are located on top of the attachment near the manifold.

CONNECTOR FITTINGS

A

A

T726G-072

A Shut-off Valve (Electric

This electric shut-off valve is located on the rear wall in the front chassis hydraulic valve compartment. It is controlled through the computer. When water spray ON (always on) or AUTO (on when trenching) is selected the valve opens and allows water flow to the pump.

T726G-091

A Quick Connect/Disconnect Fitting

The system utilizes quick connect/disconnect fittings to attach/detach to/from the nozzles.

3.59

Lubrication and Maintenance

Tigercat T726G Trencher

3.60

Tigercat T726G Trencher

Lubrication and Maintenance

THE AFTERTREATMENT SYSTEM AND ITS RELATED COMPONENTS ARE APPLICABLE TO TIER 4F MACHINES ONLY.

AFTERTREATMENT SYSTEM Tier 4f machines are equipped with a combination Diesel Oxidation Catalyst (DOC) and high-efficiency Selective Catalytic Reduction (SCR) aftertreatment system to limit the nitrogen oxide exhaust gas values (NOx) to meet Tier 4f emission standard requirements with low fuel consumption. This process is electronically controlled by the DENOX 2.2 system.

The DOC uses oxidation at high temperatures to convert carbon monoxide (CO), hydrocarbons (HC) and the soluble organic fraction (SOF) of diesel particulates into inert compounds, carbon dioxide (CO2) and water vapour (H2O). In addition, the DOC converts nitrogen oxide (NO) into nitrogen dioxide (NO2). Increased NO2 levels enhance the performance of the SCR catalyst at low temperatures and increase the effectiveness of the DOC/SCR aftertreatment system as a whole.

The high-efficiency SCR process is based on a series of chemical reactions which involve the reaction of ammonia with the oxygen in the exhaust gas to reduce nitrogen oxides (NOx) in the exhaust gas by transforming it into inert compounds: free nitrogen (N2) and water vapour (H2O). In addition, the high-efficiency catalytic converter includes a clean up catalyst (CUC) which reduces any excess ammonia (NH3), which may result from the SCR process.

IMPORTANT! Do not idle the engine longer than one hour. Damage to the emission control system will result. When this machine idles for an extended period, excess hydrocarbon buildup is created in the DOC/SCR aftertreatment system. Burn off of excess hydrocarbon, at full load, immediately after a long idle period, generates excess heat which causes damage to emission control system components.

IMPORTANT! When cleaning the machine with pressurized water it is important to avoid getting water directly or indirectly into the exhaust tube. Water in the exhaust tube will damage sensors and SCR system components and affect the proper operation of the aftertreatment system and the engine.

3.61

Lubrication and Maintenance

Tigercat T726G Trencher

AFTERTREATMENT SYSTEM COMPONENTS

Q

P

U

G

L

R

V

T

W O K E

J B

X

A

C

I

700017

3.62

H

D

Tigercat T726G Trencher

Lubrication and Maintenance

L

K

G

U

P

Q

W R N V S M

T

F

X

700018

A B C D E F G H I J K L

DEF Tank Sending Unit (includes Level Sensor) DEF Quality Sensor Heater Valve ECU – Engine (Denox 2.2 Dosing System) Exhaust Flap Diesel Oxidation Catalyst (DOC) DEF Supply Module DEF Dosing Module Filter (in Supply Module) Dosing Module (DEF Injector) Mixer Tube Catalytic Converter (includes SCR and CUC)

M N O P Q R S T U V W X

3.63

Humidity and Temperature Sensor DOC Inlet Temperature Sensor Catalytic Converter Inlet Temperature Sensor Catalytic Converter Outlet Temperature Sensor NH3 Sensor ECU – NH3 Sensor Inlet NOx Sensor ECU – Inlet NOx Sensor Outlet NOx Sensor ECU – Outlet NOx Sensor Air Filter Engine

Lubrication and Maintenance

Tigercat T726G Trencher M

W

T F

E

HC

S

V

R

U

Q

NOx I

CO

N

HC – Hydrocarbons NOx– Nitrogen Oxides CO – Carbon Monoxide NH3 – Ammonia N2 – Free Nitrogen H2O – Water CO2 – Carbon Dioxide

H

B X

P

L

O

C

G

D H2O

N2

NH3

CO2

K 630E-276

A B C D E F G H I J K L

EXHAUST GAS FLOW DIRECTION

A

COOLANT LINE

DEF Tank Sending Unit (includes Level Sensor) DEF Quality Sensor Heater Valve ECU – Engine (Denox 2.2 Dosing System) Exhaust Flap Diesel Oxidation Catalyst (DOC) DEF Supply Module DEF Dosing Module Filter (in Supply Module) Dosing Module (DEF Injector) Mixer Tube Catalytic Converter (includes SCR and CUC)

The DOC/SCR aftertreatment system is electronically managed by the DENOX 2.2 system incorporated into the engine Electronic Control Unit (ECU). The ECU calculates and adjusts the flow rate of the DEF solution into the system based on current engine speed, torque delivered, exhaust temperature, amount of nitrogen oxides and ammonia present.

The exhaust passes through the DOC which uses oxidation at high temperatures to convert carbon monoxide (CO), hydrocarbons (HC) and the soluble organic fraction (SOF) of diesel particulates into inert compounds, carbon dioxide (CO2) and water vapour (H2O). It also converts nitrogen oxide (NO) into nitrogen dioxide (NO2) which enhances the performance of the SCR catalyst.

The supply module pump picks up the DEF solution from the tank and sends it under pressure to the dosing module (DEF injector) to be injected into the exhaust at the outlet of the DOC and pass through the mixer tube upstream of the catalytic converter.

M N O P Q R S T U V W X

J DEF LINE

Humidity and Temperature Sensor DOC Inlet Temperature Sensor Catalytic Converter Inlet Temperature Sensor Catalytic Converter Outlet Temperature Sensor NH3 Sensor ECU – NH3 Sensor Inlet NOx Sensor ECU – Inlet NOx Sensor Outlet NOx Sensor ECU – Outlet NOx Sensor Air Filter Engine

The first phase of the SCR process takes place in the pipe between the DOC and Catalytic converter. High temperature exhaust gas evaporates the DEF solution instantly and, by hydrolysis, converts it into ammonia (2NH3) and carbon dioxide (CO2).Evaporation of the solution lowers exhaust gas temperature, bringing it closer to the optimum temperature required by the process.

The exhaust gases and ammonia, at the proper reaction temperature, are introduced into the catalytic converter, where the second phase of the process takes place. The ammonia is converted into free nitrogen (N2) and water vapour (H2O) by reacting with the oxygen in the exhaust gases.

Finally the high-efficiency catalytic converter incorporates a clean up catalyst (CUC) which reduces any excess ammonia (NH3) resulting from the SCR process.

3.64

Tigercat T726G Trencher

Lubrication and Maintenance

DIESEL EXHAUST FLUID (DEF) TANK

SENDING UNIT

A

41581AUNI R0

A B

D

T726G-116

C

A DEF Tank Fill Cap

The DEF tank is located behind an access door in the compartment below the fuel tank in the right rear corner of the machine. The DEF tank fill point is equipped with a strainer to prevent contaminants from entering the tank. Do not remove this strainer when filling the DEF tank.

DEF tank capacity is 80L (21 US gal). Do not overfill tank. The tank is equipped with an expansion capacity of 7% required to allow for the expansion of DEF in cold temperature conditions. DEF freezes at −11°C (12°F).

A DEF level indicator is shown on the computer display main screen, below the fuel gauge.

B

620E-082

A B C D

Coolant Heater Coil Level Sensor Strainer Temperature Sensor

The sending unit incorporates a heater coil, vent port, level sensor, strainer, temperature sensor, heating system inlet/outlet connections, DEF inlet/outlet connections and an electrical connector.

DEF QUALITY SENSOR

C

A A

B

H845D-134

A DEF Quality Sensor B Drain Plug

The DEF quality sensor is located on the bottom of the DEF tank. It does not have be removed when draining the tank.

H845D-133

A B C D

D

DEF Tank DEF Tank Fill Cap/Strainer Sending Unit DEF Quality Sensor

The DEF tank includes a fill cap/strainer, a sending unit and DEF quality sensor.

3.65

Lubrication and Maintenance

Tigercat T726G Trencher

DRAINING AND CLEANING THE DEF TANK

REMOVING THE DEF QUALITY SENSOR

Drain and clean the DEF tank when:

1. Drain and clean the DEF tank. Refer to DIESEL EXHAUST FLUID TANK – DRAINING AND CLEANING in THIS SECTION.

• A DEF-related alarm occurs and the problem may be due to a blocked DEF line or a pressurization problem.

• Any situation where a contaminated DEF supply is suspected.

1. Park the machine on level ground. Refer to PARKING THE MACHINE in SECTION 1.

2. Remove the DEF tank fill cap for venting purposes during draining.

3. Read the DEF level indicator on the computer display main screen to estimate the container capacity required to drain the DEF.

B

700144

A

A DEF Quality Sensor Access Cover B DEF Quality Sensor

2. Remove the access cover on the bottom of the DEF tank compartment (right rear of the machine).

3. Disconnect and carefully remove the DEF quality sensor at the bottom of the tank.

NOTE: DEF is corrosive to most metals. Protect the electrical connections once the DEF quality sensor has been disconnected.

B

700143

A

A Protective Plug B DEF Tank Drain Plug

4. Reinstall the quality sensor into the DEF tank.

Tighten and torque the M6 bolts to 2.5 – 3.5 Nm (1.8 – 3.5 lbf-ft).

4. Remove the protective plug on the bottom of the DEF tank compartment (right rear of the machine).

5. Replace the access cover on the bottom of the right rear of the machine.

5. Remove the DEF tank drain plug and drain the DEF into a suitable container.

REMOVING THE DEF TANK AND SENDING UNIT

6. Clean the inside of the tank with DEF or distilled water or demineralized water. Thoroughly drain the tank after cleaning.

1. Jack up the rear axle on the right side of the machine and remove the rear right wheel.

7. Replace the DEF tank drain plug.

8. Replace the protective plug on the bottom of the right rear of the machine.

Do not reuse the DEF that has been drained from the tank. Use a licensed waste disposal contractor or as otherwise required by local laws to dispose of DEF. If any DEF fluid has spilled, rinse well with water.

3.66

Tigercat T726G Trencher

Lubrication and Maintenance 5. Slide the DEF tank out through the access panel opening.

10°

700130

B

A

A

A DEF Tank Access Panel B DEF Tank

2. Remove the DEF tank access panel on the right side of the machine.

802378 802377

A Sending Unit Removal Tool (54510A)

6. Turn the DEF tank sending unit approximately 10º counterclockwise using the sending unit removal tool.

NOTE: The sending unit removal tool (54510A) is available from your Tigercat dealer parts department.

A

A

700131

A DEF Tank Retention Bolts

3. Remove the DEF tank retention bolts in the DEF tank compartment.

B

7. Slowly lift the DEF sending unit straight up and out of the tank.

A

D

C

A

T250D-122

A Sending Unit Inlet Strainer

1000004

A B C D E F

F

E

8. Inspect the inlet strainer at the bottom of the sending unit.

Electrical Connector Coolant Inlet DEF Supply Vent Port DEF Return Coolant Outlet

4. Disconnect the DEF lines and electrical connector from the DEF sending unit at the top of the tank.

Make note of the connections. Press the white and green tabs to release the connector locks.

3.67

Lubrication and Maintenance

Tigercat T726G Trencher

A

1000007

B

A Clip B Sending Unit Inlet Strainer

9. Remove the clip that secures the strainer and remove the strainer from the sending unit.

10. Clean the strainer with clean DEF, distilled water or demineralized water.

11. Reinstall the strainer in the sending unit.

12. Remove and clean the DEF fill strainer. Refer to DIESEL EXHAUST FLUID TANK – STRAINER, CLEANING in THIS SECTION. 13. Reinstall the sending unit and the DEF fill strainer.

14. Reinstall the DEF tank into the machine.

15. Reconnect the DEF lines and electrical connector to the sending unit.

16. Replace the DEF tank retention bolts.

17. Replace the DEF tank access panel.

3.68

Tigercat T726G Trencher

Lubrication and Maintenance

CLEANING THE DEF FILL STRAINER

FILLING THE DEF TANK

Remove and clean particles and debris from the DEF fill strainer every 500 hours.

1. Park the machine as described in PARKING THE MACHINE in SECTION 1.

1. Clean the area around the outside of the fill cap to prevent DEF contamination.

2. Clean the area around the top of the fill cap to prevent DEF contamination.

A

A

B

1000001

1000001

A Flap B Area under the Fill Cap

A Area under the Fill Cap

2. Remove the fill cap. Clean the area under the fill cap to prevent DEF contamination.

3. Remove the fill cap. Clean the area under the fill cap to prevent DEF contamination.

A

NOTICE Do not remove the DEF fill strainer when filling the tank. Contamination of the DEF can occur.

IMPORTANT! Avoid contamination of DEF when performing maintenance on the system as this may cause costly damage to SCR system components and will affect the proper operation of the aftertreatment system and the engine.

4. Insert the filling container spout into the flap on the top of the fill strainer and fill the tank. Do not remove the fill strainer to fill the tank.

1000002

A Fill Strainer

3. Rotate the fill strainer counterclockwise and pull it straight out.

NOTE: To avoid contamination, do not re-use DEF. Fill the tank with new DEF only. Refer to DIESEL EXHAUST FLUID (DEF) in THIS SECTION for DEF specifications.

4. Hold the flap open, invert the strainer and lightly tap against a clean, hard surface to dislodge and remove any particles.

5. Rinse the fill strainer with clean DEF, distilled water or demineralized water.

6. Replace the clean strainer. Turn clockwise to tighten.

7. Install the fill cap.

NOTE: A section of the DEF tank remains empty when the DEF level reaches the strainer to accommodate DEF expansion when it freezes.

5. Install the fill cap.

3.69

Lubrication and Maintenance

Tigercat T726G Trencher

DIESEL EXHAUST FLUID (DEF) DEF is used by the DOC/SCR aftertreatment system to lower the concentration of nitrogen oxides from the diesel engine exhaust.

DEF is an aqueous urea solution with 32.5% high purity urea and 67.5% deionized water.

NOTE: DEF may also be referred to as AUS32 or AdBlue. All DEF must be American Petroleum Institute (API) Certified DEF or meet ISO 22241 specifications.

WARNING Use only Diesel Exhaust Fluid (DEF) which meets ISO 22241 specifications. Do not fill the DEF tank with any other fluid.

DEF is injected into the exhaust gas stream during normal operation of the Selective Catalytic Reduction (SCR) aftertreatment system.

IMPORTANT! Store DEF between −5°C (23°F) and 30°C (86°F) and out of direct sunlight to maximize shelf life and to avoid DEF quality problems caused by improper storage.

Use of other fluids may cause component damage, or a fire risk which could result in death or serious injury.

IMPORTANT! Avoid contamination of the DEF when filling the tank as this may cause costly damage to the aftertreatment system components and affect the proper operation of the aftertreatment system and the engine.

NOTE: When the engine is stopped, all DEF is pumped back to tank before the engine power system is turned OFF. This process takes approximately 90 seconds.

NOTE: Extremely low levels of DEF or DEF quality problems will generate computer messages and these conditions may affect engine performance and damage to the DOC/SCR aftertreatment system components.

Take action to correct DEF quality problems immediately.

Refer to AFTERTREATMENT SYSTEM in THIS SECTION for more information regarding the use of DEF and its function in the DOC/SCR aftertreatment system.

NOTE: DEF quality problems may result in derating of engine performance to meet emission standard requirements. Take action immediately to correct DEF quality problems to avoid affecting engine performance and damage to the DOC/SCR aftertreatment system components.

Refer to COMPUTER – MESSAGES in SECTION 2.

3.70

Tigercat T726G Trencher

Lubrication and Maintenance

DIESEL EXHAUST FLUID (DEF) HANDLING AND STORAGE

AVOID DEF QUALITY PROBLEMS WITH PROPER HANDLING PRACTICES

DEF is an aqueous urea solution with 32.5% high purity urea and 67.5% deionized water.

Most DEF quality problems can be avoided entirely with a little care and proper handling of DEF.

NOTE: DEF may also be referred to as AUS32 or AdBlue and must meet ISO 22241 specifications. Use only DEF meeting this standard.

WHEN FILLING THE DEF TANK: • Clean the area around the fill cap and avoid introducing contaminants into the DEF tank when filling.

It is important to avoid contamination of DEF as this may cause costly damage to SCR system components and affect the proper operation of the SCR system and the engine.

When a problem with DEF quality is detected information messages will be sent to the computer display.

• Use only DEF that meets ISO 22241 specifications.

The use of any other fluid will contaminate the aftertreatment system and will pose a safety hazard.

PROPER STORAGE CONTAINERS • To prevent contaminants from affecting DEF quality, handle DEF only in storage, transport and filling containers intended exclusively for that purpose.

NOTE: DEF quality problems may result in derating of engine performance to meet emission standard requirements. Take action immediately to correct DEF quality problems to avoid affecting engine performance and damage to SCR aftertreatment system components.

• Polyethylene or stainless steel containers are recommended. Refer to DEF MANUFACTURER'S DOCUMENTATION for recommendations.

• DEF is corrosive to metals other than stainless steel.

Transport in metal containers other than stainless steel will result in contamination.

Refer to COMPUTER – MESSAGES – CRITICAL in SECTION 2.

For safety information refer to DIESEL EXHAUST FLUID (DEF) in SECTION 1.

PROPER STORAGE CONDITIONS DEF quality problems can often be avoided with proper storage and handling practices to maximize shelf life.

• Store DEF between −5°C (20°F) and 30°C (86°F).

• Store DEF in areas out of direct sunlight.

• Store DEF away from heat sources.

• DEF shelf life is limited. Use DEF on a first in-first out basis, within DEF manufacturer's recommended shelf life limits. DEF beyond manufacturer's recommended shelf life limits may not meet ISO 22241 specifications.

3.71

Lubrication and Maintenance

Tigercat T726G Trencher

HEATER VALVE

Heating is switched OFF when: • DEF tank temperature >16°C (61°F) • Supply module temperature >10°C (50°F) A

• Ambient air temperature >−4°C (25°F) Heating is switched ON when: • DEF tank temperature <15°C (59°F) • Supply module temperature: +8°C (46°F) • Ambient air temperature: −5°C (23°F) When conditions require heating the system will thaw DEF within 30 minutes of engine start for proper operation of the aftertreatment system.

700125

NOTE: When the engine is stopped, all DEF is pumped back to tank before the engine power system is turned OFF. This process takes approximately 90 seconds.

A Heater Valve A B

C 630E-265

A B C D

D

Connector Coolant Outlet Coolant Inlet Coolant Bypass

HEATED DEF SUPPLY LINES The DEF supply lines are heated by an electrical wire element built into each hose. The electrical connector is at the Supply Module end of the line. There are three heated lines and two types. There is one 24V line and two 12V lines. The lines can be identified by the electrical connector. The 24V line has a male connector and the 12V lines have female connectors.

A

The heater valve is located in the engine compartment on the right side of the pump drive gearbox.

The heater valve controls the flow of engine coolant through the DEF tank heater coil and the supply module when heating of the DEF is required. The heater valve also controls the constant flow of engine coolant to the dosing module for cooling purposes. This machine is equipped with electrically heated DEF supply lines.

IMPORTANT! If removing the heater valve care should be taken to reconnect the cooling hoses correctly. The heater valve is directional and if the hoses are connected incorrectly the DEF may overheat which will reduce its quality.

DEF freezes at −11°C (12°F).

Temperature sensors signals control the operation of both the electrically heated DEF supply lines and the heater valve which, depending on the temperature, opens or closes the flow of hot engine coolant to the heater coil and supply module.

B T250D-117

24 V Heated DEF Line A

C T250D-118

12 V Heated DEF Line

A DEF Line B Male Electrical Connector C Female Electrical Connector

The two 12V lines run from the Supply Module to the DEF Tank. These two lines are connected electrically in series, so if any one of these two lines fail the element in the other line would not function. For full description of wiring, refer to SECTION 6 of the SERVICE MANUAL.

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Tigercat T726G Trencher

Lubrication and Maintenance

DENOX 2.2 DOSING SYSTEM

EXHAUST FLAP

A A

700117

T726G-124

A Exhaust Flap

A Engine ECU

DENOX 2.2 control system is incorporated into the engine ECU. The DOC/SCR aftertreatment system is electronically managed by the DENOX 2.2 control system. The engine ECU calculates and adjusts the flow rate of the DEF solution into the system based on current engine speed, torque delivered, exhaust temperature, amount of nitrogen oxides and ammonia present and the humidity levels in incoming air.

An exhaust flap is located at the exhaust outlet from the engine. The computer controls the exhaust flap to automatically regulate temperature of the exhaust entering the diesel oxidation catalyst (DOC) to optimum levels for proper operation of the aftertreatment system.

3.73

Lubrication and Maintenance DIESEL OXIDATION CATALYST (DOC)

Tigercat T726G Trencher DEF SUPPLY MODULE

A

A 700250

A Diesel Oxidation Catalyst

The diesel oxidation catalyst (DOC) uses oxidation at high temperatures to convert carbon monoxide (CO), hydrocarbons (HC) and the soluble organic fraction (SOF) of diesel particulates into inert compounds, carbon dioxide (CO2) and water vapour (H2O).

In addition the DOC converts nitrogen oxide (NO) into nitrogen dioxide (NO2). Increased NO2 levels enhance the performance of the SCR catalyst at low temperatures and increase the effectiveness of the DOC/SCR aftertreatment system as a whole.

700088

A DEF Supply Module

The supply module is located in the rear compartment at the right rear of the machine.

The supply module pump picks up the DEF solution from the tank and sends it under pressure to the dosing module, mounted on the mixer tube incorporated into the diesel oxidation catalyst. DEF is injected into the exhaust at the outlet of the diesel oxidation catalyst and upstream of the catalytic converter.

The DOC is located upstream of the catalytic converter (SCR/CUC) and at its outlet incorporates the mixer tube and the mounting for the dosing module.

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Tigercat T726G Trencher

Lubrication and Maintenance

DEF DOSING MODULE FILTER

REMOVE DEF DOSING MODULE FILTER

The DEF dosing module filter should be replaced as part of scheduled maintenance every 250 hours.

1. Park the machine on level ground. Refer to PARKING THE MACHINE in SECTION 1.

If DEF and/or aftertreatment fault codes have occurred then Tigercat recommends performing a DEF flushing test and Urea Dosing System Test (UDST) at every DEF dosing module filter change to ensure proper operation of the DEF supply module.

NOTE: Verify that engine is at operating temperature before turning OFF the engine.

If no DEF and/or aftertreatment fault codes have occurred then only the DEF dosing module filter replacement is required.

2. Wipe clean the area around the DEF supply module and filter including the supply module ports with particular attention to the inlet port and filter cap to avoid introducing contamination into the filter housing while performing this procedure.

3. Place container below to catch the spills.

CHANGING DEF DOSING MODULE FILTER, DEF FLUSHING TEST AND UDST (UREA DOSING SYSTEM TEST) TOOLS REQUIRED • 27 mm (1 1⁄16 in) wrench • Container to catch DEF and flushing water • Clean distilled/demineralized water • 1 litre (0.25 US gal) plastic water bottle with hose attached* • Laptop computer with Tigercat by FPT E.A.SY. engine diagnostic software to run UDST test*

630E-281

4. Turn the filter cover counterclockwise to remove from the supply module. Use a 27 mm (1 1⁄16 in) wrench.

• PT-Box* IMPORTANT! Do not contaminate the DEF when performing maintenance on the system as this may cause costly damage to SCR system components and affect the proper operation of the aftertreatment system and the engine. *Items required if performing a DEF flushing test and UDST. 630E-282

5. Remove the equalizing element and note the colour of the filter inside (black or grey).

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Lubrication and Maintenance

Tigercat T726G Trencher

630E-285

6. Find the filter removal tool provided with the replacement parts select the correct edge BLACK (B) for black filters or GREY (G) for grey filters.

630E-287

9. Clean surfaces with distilled/demineralized water only to avoid DEF contamination.

Check the area around the filter for cracks. If cracks are found the supply module must be replaced.

10. Thoroughly clean the filter cover to avoid introducing contamination.

DEF FLUSHING TEST A 630E-284

7. Insert the tool edge completely until a click is felt or heard.

630E-286

8. Pull out the filter, using a tool in the slot on the filter removal tool if required.

630E-333

A Inlet Port

1. Disconnect the DEF hose from the inlet port of DEF supply module.

2. Fill the plastic bottle with distilled/demineralized water.

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Tigercat T726G Trencher

Lubrication and Maintenance A

630E-331

630E-332

A Inlet Port

3. Connect the water bottle hose to the inlet port of the DEF supply module.

7. Distilled water will be drawn from the bottle and flushed through the DEF supply module. Suction may begin to collapse the bottle and water flow out the bottom of the module will increase.

630E-328

8. The results of the UDST will show a flat line for DEF pressure (red line) because the pump cannot build pressure without the filter in place.

630E-334

4. Raise the water bottle above the DEF supply module.

5. A small amount of water will flow through the supply module and out the bottom where the filter has been removed.

9. Repeat the UDST test a second time to ensure the supply module is thoroughly flushed and working correctly.

10. When the UDST flushing procedure has been performed twice successfully remove the bottle and hose.

11. Reinstall the DEF module inlet hose.

6. With the aid of an assistant run a UDST test from the laptop computer. Refer to PT BOX MANUAL for UDST test information.

3.77

Lubrication and Maintenance REPLACE FILTER

Tigercat T726G Trencher 4. Check that all personnel are clear of the machine before starting the engine.

5. Insert the ignition key and turn to the RUN position.

6. Sound horn to warn personnel of machine start-up.

7. Start the engine.

8. Check for leaks.

9. Turn OFF the engine.

10. Remove the ignition key.

630E-288

1. Install the new filter. Lubricate the O-rings on the filter with clean DEF solution for easy installation.

IMPORTANT! Do not contaminate the DEF when performing maintenance on the system as this may cause costly damage to SCR system components and affect the proper operation of the aftertreatment system and the engine.

WARNING Use only diesel exhaust fluid (DEF) which meets ISO 22241 specifications. Do not fill the DEF tank with any other fluid.

630E-289

2. Install the new equalizing element.

NOTE: The equalizing element must be replaced with each filter change.

DEF is injected into the exhaust gas stream during normal operation of the Selective Catalytic Reduction (SCR) aftertreatment system.

Use of other fluids may cause component damage, or a fire risk which could result in death or serious injury.

630E-290

3. Reinstall the clean filter cover, tighten to 20 N-m (15 lbf-ft). Use a 27 mm (1 1⁄16 in) wrench.

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Lubrication and Maintenance

UDST (UREA DOSING SYSTEM TEST) 1. With the aid of an assistant run a UDST test from the laptop computer. Refer to PT BOX MANUAL for UDST test information.

630E-327

2. If the supply module is functioning correctly the test should show a characteristic curve as shown above, DEF pressure (red line).

3. A confirmation screen will indicate System is OK if the supply module is functioning correctly.

4. Repeat the UDST test a second time to confirm results.

630E-330

5. If the UDST test passes twice the supply module is OK.

630E-329

6. If the UDST test fails twice note the error mode(s) and contact customer service.

3.79

Lubrication and Maintenance DOSING MODULE (DEF INJECTOR)

Tigercat T726G Trencher MIXER TUBE

A

A

700251

A Dosing Module

The dosing module is mounted on the DOC outlet upstream of the catalytic converter. The dosing module injects DEF into the exhaust stream.

The dosing module is cooled by a constant flow of engine coolant supplied by the heater valve to maintain optimum temperature for the aftertreatment process.

630E-275

A Mixer Tube

The mixer tube is incorporated into the outlet of the DOC upstream of the catalytic converter.

The high-turbulence mixer tube is used to mix the DEF solution and exhaust gases together before they enter the catalytic converter.

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Lubrication and Maintenance

CATALYTIC CONVERTER

B

A

T726G-120

A Catalytic Converter B Diesel Oxidation Catalyst (DOC)

The catalytic converter is located above the engine in the engine compartment. Chemical reactions inside the catalytic converter reduce nitrogen oxides (NOx) in the exhaust gas.

The catalytic converter is equipped with soundproofing material and replaces the exhaust silencer. It incorporates both the selective catalytic reduction (SCR) and the cleanup catalyst (CUC) components of the aftertreatment system.

The first phase of the SCR process takes place between the DOC and the SCR. High temperature exhaust gas evaporates the DEF solution instantly and, by hydrolysis, converts it into ammonia (2NH3) and carbon dioxide (CO2).

Evaporation of the solution lowers exhaust gas temperature, bringing it closer to the optimum temperature required by the process.

The exhaust gases and ammonia at the proper reaction temperature, are introduced into the SCR, where the second phase of the process takes place. By reacting with the oxygen in the exhaust gases the ammonia is converted into free nitrogen (N2) and water vapour (H2O).

Finally the high efficiency catalytic converter incorporates a clean up catalyst (CUC) which reduces any excess ammonia (NH3) which may result from the SCR process.

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Lubrication and Maintenance

Tigercat T726G Trencher

HUMIDITY AND TEMPERATURE SENSOR

200101

A

The humidity sensor is located on the air intake just past the air cleaner.

This sensor monitors the temperature and humidity of intake air sending signals to the DENOX 2.2 control system. This information is used to calculate the amount of DEF to be injected into the system.

700122

A DOC Inlet Temperature Sensor

TEMPERATURE SENSORS A

700154

A Catalytic Converter Inlet Temperature Sensor

M00013

Temperature sensors are mounted at the inlet of the DOC, the inlet of the catalytic converter and the outlet of the catalytic converter. These three sensors send exhaust temperature signals to the DENOX 2.2 control system.

A

The control system uses this information to calculate the amount of DEF to be injected into the system.

NOTE: All three temperature sensors are identical. Note the location for analysis purposes when replacing a temperature sensor.

700122

A Catalytic Converter Outlet Temperature Sensor

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Tigercat T726G Trencher

Lubrication and Maintenance

NH3 SENSOR

NOx SENSORS A

A

B

B

630E-264 620E-088

A Electronic Control Unit B Sensor

The NH3 sensor detects and sends information about the NH3 levels in the exhaust. This information is used to calculate the amount of DEF to be injected into the system and to monitor DOC/SCR aftertreatment system operation.

A Electronic Control Unit B NOx Sensor

There are two NOx sensors and two NOx sensor ECU's in the aftertreatment system.

The NOx sensors detect and send information about the dosing of DEF solution and the efficiency of the catalytic converter to the DENOX 2.2 control system.

This information is used to calculate the amount of DEF to be injected into the system and to monitor DOC/SCR aftertreatment system operation.

Each NOx sensor consists of a ceramic sensor and an electronic control unit linked by a cable. The sensor detects the concentration of nitrogen oxides in the exhaust.

A

700122

A NH3 Sensor

The NH3 sensor is mounted at the outlet of the catalytic converter.

The sensor, cable and control unit are considered to be one part for service/replacement purposes.

NOTE: Cable length cannot be changed as this will affect the proper operation of the sensor.

A

A 700124

A NH3 Sensor ECU

The NH3 sensor ECU is mounted on the upper left side of the pump compartment.

Refer to AFTERTREATMENT SYSTEM– APPROVED ANTI-SEIZE PASTES FOR SENSORS in THIS SECTION.

700122

A Inlet NOx Sensor

The inlet NOx sensor is mounted upstream of the DOC.

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Lubrication and Maintenance

Tigercat T726G Trencher APPROVED ANTI-SEIZE PASTES FOR EXHAUST/AFTERTREATMENT SENSORS (TIGERCAT BY FPT TIER 4F ENGINES) If replacement of these components is necessary in the field, NOx sensors and NH3 sensors are pre-coated at the factory with the required anti-seize paste. The application of anti-seize is not required.

A

In the event anti-seize must be re-applied, use only the following approved products: • NOx sensors – Weicon High Tech Anti-seize only 700252

• NH3 sensor – Loctite X203 Dry Film Moly Anti-Seize

A Inlet NOx Sensor ECU

The inlet NOx sensor ECU is mounted on the left side of the pump compartment at the front of the hydraulic oil tank.

A

700124

A Outlet NOx Sensor

The outlet NOx sensor is mounted at the outlet of the catalytic converter.

A

700124

A Outlet NOx Sensor ECU

The outlet NOx sensor ECU is mounted next to the NH3 sensor ECU on the upper left side of the pump compartment.

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Tigercat T726G Trencher

CENTER JOINT Prepare the machine as described in PREPARING THE MACHINE FOR MAINTENANCE in SECTION 1 before servicing the center joint.

Lubrication and Maintenance CENTER JOINT MAINTENANCE AND INSPECTION

CENTER JOINT LUBRICATION

A

700048

A

B

C

A Front Chassis B Check for Movement in this Joint Area C Rear Chassis 700056

Visually inspect the center joint pivot for looseness every 1000 hours.

B

With an observer on the ground, keeping well clear of the center joint area, perform the following test to check for looseness of the center joint.

1. Lift the attachment off the ground and then rapidly raise and lower the head several times to bounce the machine.

2. As the machine is bouncing, check for motion between the front and rear chassis frame lugs. Also check for a clunking sound at the center joint area.

700057

A Lower Bearing Grease Port B Upper Bearing Grease Port

Lubricate the center joint upper and lower bearings every 8 hours. This purges the articulation pivot bearings of debris and water.

3. Movement between front and rear chassis lugs or clunking of the pivot indicates a loose joint and center joint preload must be checked. Refer to SECTION 11 of the SERVICE MANUAL. Take immediate action to correct problems if any symptoms described above are observed.

NOTE: A more precise method using a dial indicator will provide an accurate assessment of the condition of the center joint. Refer to SECTION 11 of the SERVICE MANUAL for details.

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Lubrication and Maintenance

Tigercat T726G Trencher

TRANSMISSION The transmission is mounted in the rear chassis behind the center joint. It has one oil reservoir that requires draining and filling.

Check the transmission oil level every 8 hours. Drain and replace the transmission oil every 250 hours.

CHECKING TRANSMISSION OIL LEVEL 1. Park the machine as described in PARKING THE MACHINE in SECTION 1.

NOTE: The machine must be level when checking transmission oil level.

B

A

700039

A

A wideRANGE TM Transmission Drain Plug – Rear B Magnetic Plug – Bottom

6. Remove the transmission drain plug and drain the oil into a suitable container for disposal.

7. Remove the magnetic drain plug and clean off any filings that have been collected.

8. Replace the drain and magnetic plugs.

9. Refill the transmission with the correct quantity of transmission fluid.

700239

Refer to SERVICE AND LUBRICATION POINTS in THIS SECTION for transmission oil capacity and recommended transmission oils.

A Transmission Dipstick/Fill Tube

2. Clean around the transmission dipstick/fill tube.

3. Remove the dipstick and read the level.

10. Replace the dipstick.

4. If transmission oil level is low, add transmission oil checking the level regularly with the dipstick. Do not overfill.

5. Replace the dipstick.

Refer to SERVICE AND LUBRICATION POINTS in THIS SECTION.

DRAINING AND REFILLING TRANSMISSION 1. Park the machine as described in PARKING THE MACHINE in SECTION 1.

2. NOTE: The machine must be level when draining and refilling the transmission.

3. Clean around the dipstick/fill tube.

4. Remove the dipstick.

5. Remove the belly pan closest to the center joint on the rear chassis.

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Tigercat T726G Trencher

Lubrication and Maintenance

PUMP DRIVE GEARBOX

DRAINING AND REFILLING PUMP DRIVE GEARBOX

The pump drive gearbox is located in the rear pump compartment. It has one gear oil reservoir that requires draining and filling.

NOTE: Drain the pump drive gearbox when the gear oil is cold. This will allow particulate that has settled to the bottom of the pump drive gearbox to be removed when the gear oil is drained.

Check the pump drive gearbox oil level every 8 hours.

Drain and replace the pump drive gearbox gear oil every 250 hours.

1. Park the machine on level ground. Refer to PARKING THE MACHINE in SECTION 1.

CHECKING PUMP DRIVE GEARBOX OIL LEVEL

NOTE: The machine must be level when draining and refilling the pump drive gearbox.

1. Park the machine on level ground. Refer to PARKING THE MACHINE in SECTION 1.

2. Clean around the dipstick and fill plug.

3. Remove the gearbox fill plug.

NOTE: The machine must be level when checking pump drive gearbox oil level.

NOTE: Do not remove the drain plug until the fill plug has been removed.

4. Locate the gearbox drain hose and remove the drain plug.

B

5. Drain the gear oil into a suitable container.

A

NOTE: Dispose of the waste gear oil according to local regulations.

6. Remove the magnetic plug on the bottom of the gearbox and clean off any filings that have collected.

7. Install the gearbox drain plug and magnetic plug.

8. Fill the gearbox with the correct quantity of gear oil.

Refer to SERVICE AND LUBRICATION POINTS in THIS SECTION for gearbox oil capacity and recommended gear oils.

700240

A Pump Drive Gearbox Dipstick B Pump Drive Gearbox Fill Plug (Top – Behind Fittings)

9. Install and tighten the fill plug.

2. Clean around the dipstick.

3. Remove the dipstick and read the level. The fluid level should fall between the ADD and FULL marks on the dipstick. Wait at least 5 minutes after stopping the engine before taking the reading.

4. If gearbox oil level is low, remove the fill plug and carefully add oil checking the level regularly with the dipstick. Do not overfill.

Refer to SERVICE AND LUBRICATION POINTS in THIS SECTION for gearbox oil capacity and recommended gearbox oils.

5. Replace and tighten the fill plug.

6. Replace the dipstick.

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Lubrication and Maintenance

Tigercat T726G Trencher

PARKING BRAKE A

G A

T726G-006

F

H

A Parking Brake Switch – Control Panel

D

B

E

C

A parking brake switch on the instrument panel applies and releases the brake, the brake will also be applied automatically when the cab door is open or if the engine is not running. See also INSTRUMENT PANEL – PARKING BRAKE SWITCH in SECTION 2 or more details regarding parking brake switch operation.

PARKING BRAKE LUBRICATION A

A

700036 700442

A B C D E F G H

Parking Brake – Hydraulically Deactivated

Parking Brake Springs Driveshaft Yoke Stationary Discs Rotating Discs Front Axle Rear Axle Transmission

The parking brake is installed in the driveline between the transmission and the front axle.

Five rotating discs are splined to the brake shaft and six stationary discs are held in place in the brake housing.

The brake is spring-applied, hydraulically-released.

Refer to SECTION 9 of the SERVICE MANUAL for complete details of the parking brake.

700058

A Parking Brake Shaft Seal Grease Fittings

Later design parking brakes are equipped with grease fittings on the front chassis to provide a grease barrier between the inner and outer shaft seals on the parking brake housing. Lubricate the parking brake seals every 125 hours. The grease fittings are located on the left side of the front chassis above the articulation lock bar.

Check the parking brake oil level every 250 hours. Drain and replace the transmission oil every 2000 hours.

Refer to SERVICE AND LUBRICATION POINTS in THIS SECTION for oil capacity and recommended gear oils.

3.88

Tigercat T726G Trencher

Lubrication and Maintenance DRAINING AND REFILLING PARKING BRAKE

A

1. Park the machine as described in PARKING THE MACHINE in SECTION 1.

NOTE: The machine must be level and the oil must be warm when draining and refilling.

2. Allow machine to sit for at least 30 minutes before draining the oil from the brake housing to allow contaminants in the oil to settle.

A

B 700492

A Front Chassis B Bottom Cover Plate – Front Chassis

The parking brake is located in the front chassis.

Remove the front chassis bottom cover plate to access the brake.

WARNING Release pilot system pressure before checking parking brake oil level. Refer to RELEASE PILOT SYSTEM PRESSURE in SECTION 1 for instructions.

CHECKING PARKING BRAKE OIL LEVEL 1. Park the machine as described in PARKING THE MACHINE in SECTION 1.

B 700493

A Fill/level Plug – Parking Brake B Drain Plug – Parking Brake

3. Clean around the fill/level and drain plugs.

4. Remove the housing fill/level plugs.

NOTE: Do not remove the drain plug until the fill/ level plug has been removed.

NOTE: The machine must be level when checking the parking brake oil level.

2. Clean around the fill/level plug and remove.

3. Wearing oil-resistant protective gloves, insert a finger into the fill/level plug hole to determine the oil level. The correct oil level is at the bottom of the fill/ level plug holes.

5. Remove the parking brake drain plug and drain the oil into a suitable container for disposal. Access to the drain plug is through the hole in the bottom of the front chassis.

6. Replace and tighten the parking brake drain plug.

4. Place a drain pan under the fill/level hole. Pump new oil into the fill/level hole until oil starts weeping out the hole. Do not overfill.

7. Place a drain pan under the fill/level hole. Pump new oil into one of the fill/level hole until oil starts weeping out the hole. Do not overfill.

5. When the oil stops weeping replace both fill/level plugs.

8. Replace the parking brake housing fill/level plug.

9. Check the drain and fill/level plugs for leaks.

3.89

Lubrication and Maintenance

DRIVESHAFTS When operating in extremely wet or dusty conditions or when the regular service schedule has been neglected, insufficient lubrication to the spline area of the middle driveshaft will result in premature wear. In addition old grease often forms into a semi-solid, rubber-like plug preventing the purging of contaminants (water, dirt, sand, etc.) through the slip spline seal.

Tigercat T726G Trencher FRONT AND REAR SHAFT SLIP SPLINE LUBRICATION Lubricate the front and rear driveshafts every 125 hours.

A

The most common cause of joint and slip spline failure is lack of proper lubrication.

B

700028

A Grease Fitting B Relief Hole in End of Shaft

1. Apply grease to grease nipple until new, clean grease appears at the relief hole at yoke end of slip spline.

2. Plug or cover relief hole and continue to apply pressure to grease nipple until new, clean grease appears at slip spline seal.

3. If grease does not appear at slip spline seal and continues to exit from the covered relief hole, remove the driveshaft and inspect for hardened grease build up, rust or other contaminants within the driveshaft. Repair or replace the driveshaft.

Refer to SECTION 8 of the SERVICE MANUAL for complete details regarding driveshaft installation.

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Tigercat T726G Trencher

Lubrication and Maintenance

MIDDLE SHAFT SLIP SPLINE LUBRICATION Lubricate the middle driveshaft every 8 hours.

A

B

700027

A Grease Nipple B Relief Fitting (Not shown – 180 Degrees from Grease Nipple)

1. Park the machine on level ground. Refer to PARKING THE MACHINE in SECTION 1.

2. Articulate the machine FULLY to the right.

3. Block the wheels and allow machine to cool.

4. Apply grease to the grease nipple until new, clean grease exits from the relief fitting.

Check to see if grease is exiting from the relief fitting. If grease does not exit from the relief fitting, remove the relief fitting and apply grease at the grease nipple. If grease flows out of relief fitting hole replace relief fitting.

If grease does not exit from the relief fitting hole, remove driveshaft and inspect for hardened grease build up, rust or other contaminants within the driveshaft. Repair or replace driveshaft.

3.91

Lubrication and Maintenance

Tigercat T726G Trencher

DRIVESHAFT INSTALLATION D

A

F

C E

B

Torque all yoke bolts to 50-66 N-m (37-49 lbf-ft) – lubricated.

NOTE: Yoke bolts on axles are M10-1.5 socket head. All other driveshaft yoke bolts are 3/8-24 UNF hex head.

700443

A Front Driveshaft B Middle Driveshaft C Rear Driveshaft

D U-Joint (6 total) E Front Axle F Rear Axle

3.92

Tigercat T726G Trencher

AXLE LUBRICATION Drain and replace the oil in the axles every 1000 hours.

NOTE: Warranty coverage of powertrain components is contingent on performance of regular oil sampling at the owner’s expense during the warranty period. Refer to FLUID ANALYSIS PROGRAM in THIS SECTION for details.

REAR AXLE – LIMITED SLIP ADDITIVES The rear axle is equipped with brakes. It is permissible to use a limited slip additive in the rear axle to reduce brake chatter noise. Do not exceed the maximum recommended amount of additive as this may cause a loss of differential lock slipping torque and brake holding torque. Refer to SERVICE AND LUBRICATION SCHEDULE in THIS SECTION for additive recommendation details.

Lubrication and Maintenance 6. Wait 5 minutes and check the level in both sides of the axle. Continue until the oil levels are correct in both axle housings.

7. When the oil stops weeping replace both level/fill plugs.

DRAINING AND REFILLING AXLES 1. Park the machine as described in PARKING THE MACHINE in SECTION 1.

NOTE: The machine must be level and the oil must be warm when draining and refilling.

2. Allow axles to sit for at least 30 minutes before draining the oil from the housings to allow contaminants in the oil to settle.

3. Clean around all fill/level and drain plugs.

4. Remove both housing fill/level plugs (one per housing).

NOTE: Do not remove the drain plugs until the fill/ level plugs have been removed.

CAUTION

5. Remove the differential drain plug and drain the oil into a suitable container for disposal.

6. Clean off any filings collected on the magnet of the drain plugs.

7. Replace and tighten the differential drain plugs.

Fluid spray hazard. Contact with fluid under pressure may cause injury.

Pressure may build up inside axle due to temperature changes. Use caution when removing drain and fill plugs, slowly loosen plug to relieve pressure before removing completely.

CHECKING AXLE OIL LEVEL 1. Park the machine as described in PARKING THE MACHINE in SECTION 1.

NOTE: The axles must be level when checking the oil level.

8. Place drain pans under the level/fill holes. Pump new oil into one of the levels/fill holes until oil starts weeping out the hole. Do not overfill.

Refer to SERVICE AND LUBRICATION POINTS in THIS SECTION for oil capacity and recommended gear oils.

9. Replace the axle housing fill/level plugs.

10. Check all drain and fill/level plugs for leaks.

11. Run axles for at least 10 minutes to remove trapped air in confined spaces.

12. Remove the fill/level plugs, recheck oil level and top up if required.

2. Clean around the fill/level plugs.

3. Remove both fill/level plugs on each axle.

4. Wearing oil-resistant protective gloves, insert a finger into the fill/level plug hole to determine the oil level. The correct oil level is at the bottom of the fill/ level plug holes.

5. Place drain pans under the level/fill holes. Pump new oil into one of the levels/fill holes until oil starts weeping out the hole. Do not overfill.

3.93

Lubrication and Maintenance

C

Tigercat T726G Trencher

D

G

A

B

E F

700444

A B C D

Axle Drain and Fill Locations– Viewing Front of Machine

Front Axle Rear Axle Front Axle Fill/Level Plug – Right Front Front Differential Drain Plug

E Rear Axle Fill/Level Plug – Right Front F Rear Differential Drain Plug G Rear Axle Pinion Seal

3.94

Tigercat T726G Trencher

Lubrication and Maintenance

C

D

B

E

A

700445

Axle Drain and Fill Locations– Viewing Rear of Machine

A Front Axle B Rear Axle C Rear Axle Fill/Level Plug – Left Rear

D Front Axle Fill/Level Plug – Left Rear E Front Axle Pinion Seal

3.95

Lubrication and Maintenance

Tigercat T726G Trencher

START-UP PROCEDURE AFTER MAJOR MACHINE MAINTENANCE Follow this procedure: • After major service or a rebuild.

B

• Whenever the machine has been drained of hydraulic oil.

A

• When any major component has been removed, repaired or replaced.

• If the engine fuel supply has been disconnected or drained, refer to ENGINE, RESTARTING ENGINE THAT HAS RUN OUT OF FUEL in SECTION 2 for instructions. Alternately, refer to the procedure for priming the fuel system in the ENGINE OPERATION AND MAINTENANCE MANUAL.

PRE-STARTUP AND FILLING 1. Check oil levels in the pump drive gearbox, engine, transmission, and axles.

700253

A Drive Pump Top Case Port Fitting B Attachment Pump Top Case Port Fitting

5. Do not start engine. Purge the air from the hydraulic system as follows: a. All filters must be in place.

2. Check the coolant level in the radiator/surge tank.

b. Loosen the fittings on the top case port of the drive pump and the attachment pump.

3. Do a final inspection of all fittings and clamps to ensure they are tight and will not leak.

These ports will assist in venting air as hydraulic oil is filling the system components.

4. Install the articulation lock bar and apply the parking brake. c.

Tighten the fittings when hydraulic oil free of air begins to flow out both fittings.

6. Use the hand fill pump to fill the hydraulic oil tank if the oil level is low, or if it has been drained.

7. Fill all the pumps and motors with pre-filtered hydraulic oil through the highest case drain ports and close the ports.

NOTE: If the axles were drained of oil, refer to AXLE LUBRICATION– DRAINING AND REFILLING AXLES in THIS SECTION and SECTION 8 of the SERVICE MANUAL. NOTE: Changing strainers, filters and replacing the hydraulic oil tends to aerate the oil. For maximum pump life, the machine should sit for 1 hour after servicing to allow entrained air to escape from the oil prior to applying working pressures to the pumps.

8. Proceed to the MACHINE START-UP procedure in THIS SECTION.

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MACHINE START-UP

CAUTION

IMPORTANT! Before beginning this procedure, perform the PRESTARTUP AND FILLING procedure outlined in THIS SECTION. 1. Install the articulation lock bar.

The machine operator must ONLY take directions from the person doing the set-up.

4. Close cab doors and turn the ignition key switch ON.

Refer to ARTICULATION LOCK BAR INSTALLATION in THIS SECTION for instructions.

5. Press and release the interlock reset switch. This will allow pilot oil to circulate and refill the pilot and case drain circuits during the following cranking procedure.

6. Crank the engine for five seconds, then wait for five seconds.

A

Check the charge pressure during cranking to observe for pressure reading. Repeat five times to pump oil into pumps and system components.

NOTE: If charge pressure gauge does not indicate a rise in pressure, check for possible cause (air in system, leaks, loose hose fittings, pumps not turning, etc.). Repair problem. Repeat steps 4-6 until a rise in charge pressure is noticed.

B 700117

7. Reconnect ECU chassis multi-pin connector.

A Engine ECU B Chassis Multi-Pin Connector

2. Disconnect the engine ECU chassis multi-pin connector (prevents engine from starting).

8. Turn the ignition key switch to RUN and observe the computer display. Wait for the screen to display the gauges before starting the engine.

B A

9. Start the engine.

If charge pressure does not rise within 20 – 30 seconds, turn OFF the engine.

700253

A Drive Pump Test Port B Attachment Pump Test Port

If charge pressure is between 18 – 31 bar (260 – 450 psi), run the engine at LOW speed for 20 minutes. Check engine oil pressure in cab. Refer to COMPUTER – ENGINE MENU in SECTION 2. Do not operate any functions.

3. Install a 0 – 70 bar (0 – 1000 psi) gauge on the drive pump and attachment pump test ports to check the charge pressures. Observe the gauges closely.

10. With engine speed at LOW and the parking brake applied, (ON), hold the foot brake DOWN and then bleed the rear axle brakes.

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IMPORTANT! Without a trenching head attached, the tilt function can cause damage to the arms. Watch the two link arms very carefully, as they may drop down beside the boom arms and wedge, causing the crank arms to bend.

When necessary, lower the boom DOWN, watching closely and tilt FORWARD, again watching the link arms closely.

A

M726E-130

A B

A Engine Coolant Fill Cap

14. Top up the surge tank with clean engine coolant.

B

A

C

C 700238

700451

A Crank Arm B Link Arm C Boom Arm

Crank, Link and Boom Arms

11. Set engine speed at LOW and run each boom function for two minutes at LOW pressure to purge air from circuit.

NOTE: If the machine was on wheels, the steer and drive functions were not properly purged or flushed.

Remove the articulation lock bar and slowly operate the steer function right and left a few times at LOW speed. With the parking brake released, slowly operate the drive function forward and reverse a few times at LOW speed.

A Hydraulic Oil Level Sight Gauge B Full Mark C Add Mark

15. With ALL CYLINDERS FULLY RETRACTED, check hydraulic oil level.

16. If required, top up the hydraulic oil tank with clean oil using the oil fill pump. For operating instructions refer to HYDRAULIC SYSTEM – HYDRAULIC OIL HAND FILL PUMP in THIS SECTION. 17. Remove the gauges from the 'M3' test ports on drive pump and attachment pump. Clean up any spilled oil.

NOTE: If possible, allow the machine to stand for four to six hours before setting any of the operating pressures. This will allow any air bubbles in the oil to escape and is a good time to check for leaks.

12. Set engine speed at HIGH and run each function again for two minutes to flush the circuit.

18. Recheck hydraulic oil level and top up if required.

13. Set engine speed at LOW and turn OFF the engine.

19. Refer to appropriate section of the SERVICE MANUAL to check and set operating pressures.

20. Disconnect the articulation lock bar and place it in the stored position.

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CARE OF THE MACHINE • All fluid levels must always be at the proper level.

Refer to the LUBRICATION AND MAINTENANCE SCHEDULE in THIS SECTION. • Lubricate all grease points at the required intervals as specified in the LUBRICATION AND MAINTENANCE SCHEDULE in THIS SECTION. • The cab emergency exits must be in working order by following the EMERGENCY EXIT MAINTENANCE GUIDE in THIS SECTION. • Follow proper procedure for cleaning windows described in THIS SECTION. • Do not allow branches, twigs, leaves or pine needles to build up around radiator intake doors or anywhere else on the machine. Clean as operating conditions warrant but at least once a day all debris must be remove from the machine interior.

• Do not apply load to a cold engine.

• Always harvest trees in LOW driving range.

• Never park machine with head raised off the ground. Be sure the head is resting on the ground before servicing or parking the machine. Refer to PARKING THE MACHINE in SECTION 1.

• SAFETY FIRST! Follow all safety rules and regulations as outlined in SECTION 1.

IMPORTANT! When cleaning the machine with pressurized water it is important to avoid getting water directly or indirectly into the exhaust tube. Water in the exhaust tube will damage sensors and SCR system components and affect the proper operation of the after treatment system and the engine.

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PRESSURE WASHING

PRESSURE WASHING PROCEDURE

Pressure washing is one of the easiest and most economical ways to preserve your investment.

Accumulated mud can damage track rollers, sand will grind down pins and bearings and wood debris buildup in machine enclosures is a serious fire hazard. Pressure washing is also good practice before and after servicing equipment.

1. Park the machine on level ground. Refer to PARKING THE MACHINE in SECTION 1.

CAUTION

2. Close and latch the cab door.

3. Open all engine compartment doors. Refer to ACCESS DOORS AND COVERS in THIS SECTION. 4. Turn OFF the battery disconnect switch.

5. Pressure wash:

To avoid slips, trips or falls, all handles, steps and platforms must be kept free of grease, oil, fuel, mud, snow, ice, and forest debris.

• Drive motors and compartments • Oil cooler, cooler package and enclosure screens • Engine compartment

CAUTION

• Hydraulic pumps and compartment • Main control valve and compartment • Cab windows. Refer to CARE OF POLYCARBONATE WINDOWS in THIS SECTION.

Use personal protective equipment to guard against flying debris.

IMPORTANT! Use a high volume, low pressure fan nozzle or nozzle setting for all equipment cleaning. High pressure spray can damage paint, penetrate electrical connections and remove labels. Use a mild detergent and make sure pressure settings are below 83 bar (1200 psi).

A

IMPORTANT! Allow the engine to cool down before pressure washing the engine compartment. Pressure washing a hot engine with cold water could crack the engine block or other components.

To avoid damaging sensitive machine components, do not allow water to come in contact with electrical/ electronic components or air ducts and filters inside the vehicle.

Due to the sensitive electronics on this machine use only warm water, a mild detergent and a gentle pressure wash setting.

B

845C-242

A Pressure Washer Extension B Platform Ladder

To clean hard-to-reach areas, use a platform ladder or attach an extension wand to your pressure washer, extend it to the desired height and lock it in place.

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CLEANING COOLER PACKAGE B

Check the cooler package every 8 hours or more often where conditions cause accumulation of twigs, leaves, pine needles and dust. Also check all engine enclosure doors.

A

B

A

700767

A Upper-Right Door B Lower-Right Access Panel

The cross-flow fan is located on the right side of the machine behind the upper-right hinged door and lowerright access panel.

700766

A Upper-Left Door B Lower-Left Access Panel

The cooler package is located on the left side of the machine behind the upper-left hinged door and the lower-left access panel.

726GT-036

Cross-Flow Fan– Right Side

A

B

C

D

The cross-flow fan draws air from the left side of the machine through the door and cooler package blowing it out of the right side of the machine.

T726G-037

A B C D

Hydraulic Oil Cooler A/C Condenser Core Radiator (Engine Coolant Core) Charge Air Cooler

The cooler package consists of the hydraulic oil cooler, the A/C condenser core, the radiator and the charge air cooler (CAC) 3.101

Lubrication and Maintenance CLEANING PROCEDURE 1. Park the machine on level ground. Refer to PARKING THE MACHINE in SECTION 1.

2. Shut down the machine as per instructions in ENGINE – STOPPING in SECTION 2.

Always follow proper engine shutdown procedures.

The important benefits are: • Extended life of engine, cooling and exhaust systems.

• Reduced risk of post shutdown fires.

• Interior of machine cools significantly reducing risks from touching hot surfaces.

Tigercat T726G Trencher USING THE FAN CLEAN FUNCTION TO REMOVE DEBRIS DURING OPERATION The hydraulic fan circuit has a CLEAN function for use in cleaning debris from the charge air cooler, radiator, oil cooler, A/C condenser, pump drive gearbox cooler, and air intake door screens during operation. By reversing the direction of the fan, air flows in the opposite direction, thereby forcing dust and debris off the charge air cooler, radiator, oil cooler, A/C condenser, pump drive gearbox cooler, and air intake door screens. Be sure no personnel are standing directly to the left of the machine when performing this operation. Dust and debris will fly out. Refer to FAN SWITCH (ENGINE COOLING) in SECTION 2 for more information.

3. Open both cooler package access doors on the sides of the machine by swinging the latch pin stop to the side, lifting up the pin and swing.

4. Lift out the bottom screen panels on the right and left sides of the front engine area, behind the cab.

5. Use compressed air or water for cleaning.

CAUTION Use compressed air for cleaning only when the machine is cold to avoid the risk of fire caused by debris being blown into contact with hot surfaces.

If using compressed air for cleaning, use at 2 bar (30 psi) or less.

Always use personal protective equipment (eye wear) to guard against flying debris.

If an oil leak occurs in this area it should be thoroughly power-washed with a mild soap to ensure that all of the oil is removed. The presence of oil causes dust and dirt to cling to surfaces which impairs the ability of the reversible fan to remove dust and dirt particles.

Take care when cleaning the cooler package as the components can be damaged by careless handling and cleaning.

CAUTION Avoid the risk of fire caused by debris accumulating on surfaces that may become hot during machine operation. Always use care when cleaning to ensure debris removed from one area of the machine does not accumulate on other areas of the machine.

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CARE OF POLYCARBONATE WINDOWS

INSPECTION AND MAINTENANCE

Most windows used in the cab are made from a polycarbonate resin thermoplastic. This material is a replacement for glass when improved strength, durability and safety is required.

Daily inspection and maintenance is essential to confirm the window’s ability to protect the operator has not been compromised.

Polycarbonate material is expected to resist heavy impact from large branches and falling tree tops and to absorb high levels of energy when contacted by high velocity thrown objects such as wood chips, disc saw blade teeth or broken harvester head saw chain.

• Inspect all windows daily and immediately after any impacts.

• Check for any damage to the window material or steel structure in the area of the window mounting.

The extreme operating environment seen in logging applications heightens the need to regularly inspect and properly maintain polycarbonate cab windows.

Polycarbonate windows are an essential piece of operator protective equipment and should be maintained as such. It is important to note that cracks, chips, notches or scarring anywhere on the viewing surface or edges of the window will decrease ability to resist heavy impacts and therefore compromise effectiveness as operator safety protective equipment. Windows with these defects must be replaced immediately.

Refer to WINDOWS– CARE OF POLYCARBONATE WINDOWS– INSPECTION AND MAINTENANCE in THIS SECTION for detailed information regarding inspection and maintenance of polycarbonate windows.

• The edges of the polycarbonate window must be evenly and fully supported on a flat surface around the entire window opening at all times. Bent or dented skylight structures must be replaced immediately. Bent or dented cab structures must be evaluated immediately for possible repair or replacement.

• The viewing surface and edges of the polycarbonate window must be free from cracks, chips, notches or scarring and the edges must not be pinched or stressed. These defects will decrease its ability to resist heavy impacts and therefore compromise effectiveness as operator safety protective equipment. Windows with these defects must be replaced immediately.

• Bent, dented or missing window retaining parts must be replaced immediately.

• Rubber materials used in mounting the window must be maintained in good condition.

• Identification of the polycarbonate originally used by Tigercat is hot stamped in a corner of the window to identify its composition. Do not use any replacement window without proof of its material composition. Do not substitute with any other materials.

• Skylights, cab structures, windows and window retaining parts must not be modified or replaced with components that are not approved by Tigercat.

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RESISTANCE TO CHEMICALS

CLEANING INSTRUCTIONS

The resistance of polycarbonate material to chemical exposure varies widely. Fortunately, polycarbonate materials have good resistance to diesel fuel, grease, hydraulic oil, kerosene and engine oil.

The viewing surfaces of polycarbonate cab windows are specially treated with a hard coating to provide enhanced resistance to abrasion and ultra-violet (UV) radiation.

Other chemicals however can seriously weaken the polycarbonate.

Do not permit any of the following chemicals to come into contact with polycarbonate windows: • Acetone • Air Conditioning Refrigerant

The following instructions are provided to prolong the life of this protective hard coating.

1. Rinse the window thoroughly with lukewarm water 2. Using a soft cloth, cellulose sponge or chamois, gently wash the window with a mild solution of soap or detergent in lukewarm water. Do not scrub or use brushes or squeegees.

Brand name soaps and detergents recommended for cleaning polycarbonate are:

• Ammonia • Anti-Freeze

• Fantastik

• Benzene

• Formula 409

• Brake Fluid

• Hexcel F.O. 554

• Carbon Tetrachloride

• Joy

• Cutting Oils

• Lysol

• Gasoline

• Mr. Clean

• Lacquer Thinner

• Neleco-Placer

• Toluene

• Pine-Sol

• Turpentine

• Top Job

• Xylene

RESISTANCE TO WATER Polycarbonate material has good resistance to water up to approximately 65°C (150°F). Above this temperature the effect of water is time-temperature related. This means the higher the water temperature, the shorter the time before the polycarbonate is adversely affected.

3. Rinse the window thoroughly with lukewarm water.

4. Dry the window with a moist soft cloth, cellulose sponge or chamois to prevent water spotting.

5. To remove grease or oil, first rub lightly with a good grade of VM&P Naphtha or isopropyl alcohol followed by the same rinse, wash, rinse and dry procedure described in steps 1 to 4.

Refer to WINDOWS– CARE OF POLYCARBONATE WINDOWS – RESISTANCE TO CHEMICALS in THIS SECTION for a list of chemicals which should not be permitted to come into contact with polycarbonate windows.

Exposing polycarbonate to repeated steam cleaning or high temperature pressure washing may result in crazing, a phenomenon that causes clouding of the surface. Crazing can ultimately result in a loss of physical strength and may precede a fracture.

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Lubrication and Maintenance GRAFFITI REMOVAL

CAUTION • Do not use abusive cleaning procedures

• For removal of paints, marking pen inks, etc., the use of Butyl Cellosolve is generally effective. The use of masking tape, adhesive tape or lint removal tools works well for lifting off old weathered paints.

• Do not use brushes, razor blades, scrapers, squeegees or other sharp tools on polycarbonate windows.

• To remove labels, stickers, etc., the use of kerosene, VM&P naphtha, or petroleum spirits is generally effective. When the solvent will not penetrate sticker material, apply heat (hair drier) to soften the adhesive and promote removal.

either by hand or pressure washing on polycarbonate windows.

• Do not clean polycarbonate windows when the daytime temperature is high or in direct sunlight.

Refer to WINDOWS– CARE OF POLYCARBONATE WINDOWS – RESISTANCE TO CHEMICALS for a list of chemicals which should not be permitted to come into contact with polycarbonate windows.

• Do not use abrasive or highly alkaline cleaners on polycarbonate windows.

FIRE PRECAUTIONS

• Do not use glass cleaners in either aerosol or non aerosol containers to clean polycarbonate windows.

Polycarbonate window material will ignite when exposed to an ignition source in excess of 427°C (800°F). When working around polycarbonate windows, observe similar fire precautions to those in place for wood.

Failure to follow these cleaning instructions will shorten the service life of polycarbonate and may cause visual hazing, loss of light transmission and delamination of the polycarbonate hard surface coating.

CONCEALING HAIRLINE SCRATCHES The appearance of scratches and minor abrasions on the surfaces of polycarbonate windows can be minimized by using a mild automotive polish such as: • Johnson’s Paste Wax • Novus Plastic Polish #1 and #2 • Mirror Glaze Plastic Polish Be certain to clean the polycarbonate window as outlined prior to application of an automotive polish. Refer to WINDOWS– CARE OF POLYCARBONATE WINDOW– CLEANING INSTRUCTIONS in THIS SECTION.

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CLEANING INSTRUCTIONS FOR GLASS WINDOWS (BOTH DOORS)

REMOVAL OF ANTI-CORROSION SPRAY (IF APPLICABLE)

Normal window cleaning procedures are acceptable.

Some machines, particularly machines shipped outside North America, are shipped with an optional anticorrosion spray to protect the machine from corrosion during shipment.

This anti-corrosion spray should be removed when the machine reaches it’s destination as it may cause debris to stick to the treated surfaces of the machine.

The anti-corrosion spray can be removed with a pressure washer, a sponge and soap.

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PRESSURE AND SPEED SETTINGS T726G

With hydraulic oil at operating temperature 49°C–60°C (120°F–140°F) Location

bar

Pressure

psi

Engine High Idle Low Idle

Engine rpm 1850 ± 25 900 ± 25

Pilot Manifold Pressure Relief Valve Pressure Reducing Valve

47 38

675 550

1000 1000

Drive Pump Charge Pressure Relief Valve Pump POR Forward Pump POR Reverse

24 348 348

350 5050 5050

1000 1800 1800

Drive Motor Drive Motor POR

280

4050

1800

Steer Valve Steer Valve Main Relief Steer Right Port Relief Non-Adjustable Steer Left Port Relief Non-Adjustable

173 229 229

2500 3325 3325

1800

Attachment Pump Charge Pressure Relief Valve Pump POR High Pressure Relief Reverse High Pressure Relief Forward

24 379 138 414

350 5500 2000 6000

1000 1000 1000 1000

Boom Valve Main Relief Boom LIFT Port Relief Boom LOWER Port Relief Tilt IN Port Relief Tilt OUT Port Relief Left Side Plate Traverse LEFT Port Relief Left Side Plate Traverse RIGHT Port Relief Right Side Plate Traverse LEFT Port Relief Right Side Plate Traverse RIGHT Port Relief

179 200 152 200 200 138 138 138 138

2600 2900 2200 2900 2900 2000 2000 2000 2000

1800 1000 1000 1000 1000 1000 1000 1000 1000

T726G PRESSURE SETTINGS IMPORTANT NOTES: Boom support must be used part# 4128A. When performing tilt out function without a trenching head installed, do not allow crank arms to hit boom.

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TORQUE CHART LOCATION Cylinders Piston nut, steer cylinder Piston nut, lift/tilt cylinder Gland, steer cylinder Gland, lift/tilt cylinder Keeper plate bolts

THREAD DIAMETER

TORQUE (LUBRICATED) lbf-ft Nm

1 1/4" UNF 1 1/2" UNF 1/2" UNC 3/4" UNC

930 1640 450 80 282-310

1282 2260 620 109 389-420

M16 x 2

282

382

1/2" UNC 3/4" UNC

80-88 282-310

109-119 393-420

Engine mounting Mount to chassis bolts Mount to engine bolts Mount to pump drive bolts

7/8" UNC M12 x 1.75 (10.9) 5/8" UNC

430 75 159-175

583 102 216-237

Pump drive gearbox Drive plate to flywheel bolts Bell housing to engine bolts

M10 x 1.5 (10.9) M10 x 1.5 (10.9)

37 42

50 57

1 1/4" x 18 UNEF 3/4" UNC

475-525 357

644-711 484

1/2" UNF 1/2" UNF 3/8" UNF

120-132 120-132 37-49

163-179 163-179 50-66

Axle mounting bolts Front axle bolts Rear axle bolts

7/8" UNC 3/4" UNC

475 226

644 307

Wheel bolts

7/8" UNF

500-550

678-746

Transmission housing to frame Mount to frame bolts Housing to mount bolts, wideRANGETM

7/8" UNC 7/8" UNC 5/8" UNC

364 364 159

500 494 215

Cab pin keeper plate bolts Center joint bearing Bearing retaining bolts Pin retaining bolts

Driveshafts Yoke retaining nut, front shaft Pillow block retaining bolts Universal joint bolts Rear & Mid. driveshaft Front driveshaft to Mid. driveshaft Front driveshaft to axle

Torque values pertaining to the engine and attachment are provided in the appropriate manuals.

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GENERAL TORQUE SPECIFICATIONS IMPERIAL

The torque values listed below are for general use only.

Do not use these values if a different torque value or tightening procedure is shown for a specific application.

GRADE 8 BOLTS

GRADE 5 BOLTS

IMPERIAL BOLT TORQUE SPECIFICATIONS GRADE 5 BOLTS GRADE 8 BOLTS LUBRICATED COARSE Nm lbf-ft THREAD 1/4" - 20 9-9 6-7 5/16" - 18 18 - 19 13 - 14 3/8" - 16 31 - 35 23 - 25 7/16" - 14 50 - 55 37 - 41 1/2" - 13 77 - 84 57 - 62 9/16" - 12 111 - 122 82 - 90 5/8" - 11 153 - 168 113 - 124 3/4" - 10 271 - 298 200 - 220 7/8" - 9 437 - 480 322 - 354 1" - 8 654 - 720 483 - 531 1 1/8" - 7 808 - 888 596 - 655 1 1/4" - 7 1139 - 1253 840 - 924 FINE LUBRICATED THREAD Nm lbf-ft 1/4" - 28 10 - 11 7-8 5/16" - 24 20 - 22 14 - 16 3/8" - 24 36 - 39 26 - 29 7/16" - 20 56 - 62 41 - 46 1/2" - 20 86 - 95 64 - 70 9/16" - 18 123 - 136 91 - 100 5/8" - 18 173 - 190 127 - 140 3/4" - 16 302 - 332 223 - 245 7/8" - 14 482 - 530 355 - 391 1" - 14 735 - 808 542 - 596 1 1/8" - 12 906 - 996 668 - 735 1 1/4" - 12 1262 - 1388 930 - 1023

DRY Nm lbf-ft 11 - 13 8-9 24 - 26 17 - 19 42 - 46 31 - 34 67 - 74 49 - 54 102 - 112 75 - 83 147 - 162 109 - 120 203 - 224 150 - 165 361 - 397 267 - 293 582 - 640 429 - 472 873 - 960 644 - 708 1077 - 1185 794 - 874 1519 - 1671 1121 - 1233 DRY Nm lbf-ft 13 - 14 10 - 11 26 - 29 19 - 21 47 - 52 35 - 38 75 - 82 55 - 61 115 - 127 85 - 93 164 - 181 121 - 133 230 - 253 170 - 187 403 - 443 297 - 327 642 - 706 474 - 521 979 - 1077 722 - 795 1207 - 1328 890 - 980 1682 - 1850 1241 - 1365

COARSE THREAD 1/4" - 20 5/16" - 18 3/8" - 16 7/16" - 14 1/2" - 13 9/16" - 12 5/8" - 11 3/4" - 10 7/8" - 9 1" - 8 1 1/8" - 7 1 1/4" - 7 FINE THREAD 1/4" - 28 5/16" - 24 3/8" - 24 7/16" - 20 1/2" - 20 9/16" - 18 5/8" - 18 3/4" - 16 7/8" - 14 1" - 12 1 1/8" - 12 1 1/4" - 12

LUBRICATED DRY Nm lbf-ft Nm lbf-ft 12 - 13 9 - 10 16 - 18 12 - 13 25 - 27 18 - 20 33 - 37 25 - 27 44 - 49 33 - 36 59 - 65 44 - 48 71 - 78 52 - 58 95 - 104 70 - 77 108 - 119 80 - 88 144 - 159 106 - 117 156 - 172 115 - 127 208 - 229 154 - 169 215 - 237 159 - 175 287 - 316 212 - 233 383 - 421 282 - 310 510 - 561 376 - 414 616 - 678 455 - 500 822 - 904 606 - 667 924 - 1016 681 - 750 1232 - 1355 909 - 999 1310 - 1441 966 - 1063 1746 - 1921 1288 - 1417 1848 - 2033 1363 - 1499 2464 - 2710 1817 - 1999 LUBRICATED DRY Nm lbf-ft Nm lbf-ft 14 - 15 10 - 11 18 - 20 14 - 15 28 - 30 20 - 22 37 - 41 27 - 30 50 - 55 37 - 41 67 - 74 49 - 54 79 - 87 58 - 64 106 - 116 78 - 86 122 - 134 90 - 99 163 - 179 120 - 132 174 - 192 128 - 141 232 - 255 171 - 188 244 - 268 180 - 198 325 - 358 240 - 264 427 - 469 315 - 346 569 - 626 420 - 462 680 - 748 502 - 552 907 - 997 669 - 736 1037 - 1141 765 - 841 1383 - 1521 1020 - 1122 1468 - 1615 1083 - 1191 1958 - 2154 1444 - 1588 2046 - 2250 1509 - 1660 2728 - 3000 2012 - 2213

METRIC

METRIC BOLT TORQUE SPECIFICATIONS CLASS 8.8

SIZE PITCH LUBRICATED mm Nm lbf-ft M6 1 8-9 6-7 M8 1.25 20 - 22 15 - 16 M10 1.5 39 - 43 29 - 32 M12 1.75 68 - 75 50 - 55 M14 2 109 - 120 80 - 89 M16 2 169 - 186 125 - 137 M18 2.5 234 - 257 172 - 190 M20 2.5 330 - 364 244 - 268 M22 2.5 451 - 496 332 - 366 M24 3 571 - 628 421 - 463 M27 3 837 - 921 618 - 679 M30 3.5 1135 - 1249 837 - 921 M33 3.5 1545 - 1699 1139 - 1253 M36 4 1985 - 2183 1464 - 1610

CLASS 10.9 LUBRICATED DRY Nm lbf-ft Nm lbf-ft Nm lbf-ft 11 - 12 8-9 11 - 12 8-9 15 - 17 11 - 12 26 - 29 19 - 21 27 - 30 20 - 22 36 - 40 27 - 30 52 - 57 38 - 42 54 - 60 40 - 44 72 - 79 53 - 59 91 - 100 67 - 74 94 - 104 70 - 77 126 - 138 93 - 102 145 - 160 107 - 118 151 - 166 111 - 122 201 - 221 148 - 163 226 - 248 166 - 183 234 - 257 173 - 190 312 - 343 230 - 253 312 - 343 230 - 253 323 - 356 239 - 262 431 - 474 318 - 350 441 - 485 325 - 357 457 - 503 337 - 371 610 - 670 450 - 495 601 - 661 443 - 487 623 - 686 460 - 506 831 - 914 613 - 674 761 - 838 562 - 618 790 - 869 583 - 641 1053 - 1159 777 - 855 1116 - 1228 823 - 906 1158 - 1274 854 - 940 1544 - 1699 1139 - 1253 1514 - 1665 1116 - 1228 1570 - 1727 1158 - 1274 2094 - 2303 1544 - 1699 2060 - 2266 1519 - 1671 2137 - 2351 1576 - 1734 2849 - 3134 2102 - 2312 2646 - 2911 1952 - 2147 2745 - 3020 2025 - 2227 3661 - 4027 2700 - 2970 DRY

3.109

CLASS 12.9 LUBRICATED DRY Nm lbf-ft Nm lbf-ft 13 - 14 10 - 11 18 - 19 13 - 14 32 - 35 24 - 26 43 - 47 31 - 35 63 - 70 47 - 51 84 - 93 62 - 68 110 - 121 81 - 90 147 - 162 109 - 119 176 - 194 130 - 143 235 - 259 173 - 191 274 - 301 202 - 222 365 - 401 269 - 296 378 - 416 279 - 307 504 - 554 372 - 409 534 - 588 394 - 433 712 - 784 525 - 578 728 - 801 537 - 591 971 - 1068 716 - 788 923 - 1016 681 - 749 1231 - 1354 908 - 999 1354 - 1489 998 - 1098 1805 - 1985 1331 - 1464 1835 - 2019 1354 - 1489 2447 - 2692 1805 - 1985 2498 - 2747 1842 - 2026 3330 - 3663 2456 - 2702 3208 - 3529 2366 - 2603 4278 - 4706 3155 - 3471

Lubrication and Maintenance

Tigercat T726G Trencher

Parker

ASSEMBLY TORQUE The four-bolt port is simply a circular opening (flow passage) surrounded by four tapped holes in a certain pattern for acceptance of the flange clamping bolts. The flat surface of the port compresses the O-ring contained in the groove in the flange head when the clamp bolts are torqued. In some instances, the groove is in the port and not in the flange head. The bolts, through the clamp halves, clamp down the flange head onto the flat surface of the port compressing and trapping the O-ring in the groove and leaving no gap for it to extrude under pressure. The hydraulic pressure is thus sealed by the compressed O-ring as long as the bolts are tightened enough to maintain solid metal to metal contact between the flange head at the outside diameter of the O-ring and the top of the port.

A B C

D E F

FLANGE PORT ASSEMBLY The steps to properly assemble the flange port clamping bolts are:

FLANGE.JPG

A B C D E F

4-Bolt Split Flange Components

Washers Bolts Flange Clamp Flange Head O-Ring Tapped Holes

1. Make sure sealing surfaces are free of burrs, nicks, scratches or any foreign particles.

2. Lubricate the O-ring.

3. Position flange and clamp halves.

4. Place lock washers on bolts and insert through clamp halves.

• The 4-Bolt Split Flange consists of four main components:

5. Hand tighten bolts.

• A body (flange head) • An O-ring • One captive or two split flange clamps • Four bolts and washers Dash Size

Flange Size

Inch Bolt (J518)

Torque lbf-ft

Metric Bolt (ISO 6162)

Torque Nm

8 12 16 20 24 32 40 48 56 64 80

1/2 3/4 1 1-1/4 1-1/2 2 2-1/2 3 3-1/2 4 5

5/16-18 3/8-16 3/8-16 7/16-14 1/2-13 1/2-13 1/2-13 5/8-11 5/8-11 5/8-11 5/8-11

17 +/- 2 25 +/- 3.5 31 +/- 4.5 41 +/- 5 52 +/- 6 60 +/- 6 85 +/- 9 144 +/- 15 125 +/- 8 125 +/- 8 125 +/- 8

M8 M10 M10 M12 M12 M12 M12 M16 M16 M16 M16

25 49 49 85 85 135 95 220 220 220 220

FLANGE2.JPG

A

Flange Bolt Tightening Sequence

6. Torque bolts in diagonal sequence in small increments to the appropriate torque level listed in Table T6 or Table T7 on this page.

Table T6 – Code 61 Flange Recommended Bolt Torque

NOTE: Does not meet ISO 6162 specification.

Dash Size

Flange Size

Inch Bolt (J518)

Torque lbf-ft

Metric Bolt (ISO 6162)

Torque N-m

8 12 16 20 24 32

1/2 3/4 1 1 1/4 1 1/2 2

5/16-18 3/8-16 7/16-14 1/2-13 5/8-11 3/4-10

17 +/- 2 30 +/- 4.5 46 +/- 4.5 69 +/- 6 125 +/- 8 208 +/- 20

M8 M10 M12 M14 M16 M20

25 49 85 135 210 425

Table T7 – Code 62 Flange Recommended Bolt Torque

NOTE: Does not meet ISO 6162 specification.

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Tigercat T726G Trencher

Lubrication and Maintenance

Parker

ASSEMBLY TORQUE

JIC 37 Degree Flare SAE Dash Size -2 -3 -4 -5 -6 -8 -10 -12 -14 -16 -20 -24 -32 -40

NPTF

Tube Connection Swivel or Hose Connection FFWR FFWR

Thread Size 5/16-24 3/8-24 7/16-20 1/2-20 9/16-18 3/4-16 7/8-14 1 1/16-12 1 3/16-12 1 5/16-12 1 5/8-12 1 7/8-12 2 1/2-12 3-12

NA NA 2 2 1 1/2 1 1/2 1 1/2 1 1/4 1 1 1 1 1 1

SAE Dash Size

NA NA 2 2 1 1/4 1 1 1 1 1 1 1 1 1

-2 -3 -4 -5 -6 -8 -10 -12 -14 -16 -20 -24 -32 -40

F.F.W.R : Flats From Wrench Resistance All values are for Steel, Stainless Steel and Brass

Tube Connection Swivel or Hose Connection TFFT TFFT

Thread Size 1/8-27 NA 1/4-18 NA 3/8-18 1/2-14 7/8-14 3/4-14 NA 1-11 1/2 1 1/4-11 1/2 1 1/2-11 1/2 2-11 1/2 NA

-2 -3 -4 -5 -6 -8 -10 -12 -14 -16 -20 -24 -32 -40

BSPT

Tube Connection Swivel or Hose Connection FFWR FFWR

Thread Size NA NA 9/16-18 NA 11/16-16 13/16-16 1-14 1 3/16-12 NA 1 7/16-12 1 11/16-12 2-12 NA NA

NA NA 1/4 TO 1/2 NA 1/4 TO 1/2 1/4 TO 1/2 1/4 TO 1/2 1/4 TO 1/2 NA 1/4 TO 1/2 1/4 TO 1/2 1/4 TO 1/2 NA NA

2-3 NA 2-3 NA 2-3 2-3 NA 2-3 NA 1.5-2.5 1.5-2.5 1.5-2.5 1.5-2.5 NA

T.F.F.T. : Turns from finger tight All pipe values are for Steel, Stainless Steel and Brass

O'ring Face Seal / Seal-Lok SAE Dash Size

2-3 NA 2-3 NA 2-3 2-3 NA 2-3 NA 1.5-2.5 1.5-2.5 1.5-2.5 1.5-2.5 NA

SAE Dash Size

NA NA 1/2 TO 3/4 NA 1/2 TO 3/4 1/2 TO 3/4 1/2 TO 3/4 1/3 TO 1/2 NA 1/3 TO 1/2 1/3 TO 1/2 1/3 TO 1/2 NA NA

-2 -3 -4 -5 -6 -8 -10 -12 -14 -16 -20 -24 -32 -40

F.F.W.R : Flats From Wrench Resistance All values are for Steel, Stainless Steel and Brass

Tube Connection Swivel or Hose Connection TFFT TFFT

Thread Size 1/8-28 NA 1/4-19 NA 3/8-19 1/2-14 NA 3/4-14 NA 1-11 1 1/4-11 1 1/2-11 2-11 NA

2-3 NA 2-3 NA 2-3 2-3 NA 2-3 NA 1.5-2.5 1.5-2.5 1.5-2.5 1.5-2.5 NA

2-3 NA 2-3 NA 2-3 2-3 NA 2-3 NA 1.5-2.5 1.5-2.5 1.5-2.5 1.5-2.5 NA

T.F.F.T. : Turns from finger tight All pipe values are for Steel, Stainless Steel and Brass

SAE J1926Straight StraightThread Thread Port Assembly Torques SAE J1926 Port Assembly Torques ASSEMBLY ASSEMBLY TORQUE TORQUE == 10 10 % -0 SAE SAE DASH DASH SIZE SIZE

22 33 44 55 66 88 10 10 12 12 14 14 16 16 20 20 24 24 32 32

ADJUSTABLE ADJUSTABLE

NON-ADJUSTABLE NON-ADJUSTABLE THREAD THREAD SIZE SIZE

5/16-24 5/16-24 3/8-24 3/8-24 7/16-20 7/16-20 1/2-20 1/2-20 9/16-18 9/16-18 3/4-16 3/4-16 7/8-14 7/8-14 1/16-12 111/16-12 3/16-12 113/16-12 5/16-12 115/16-12 5/8-12 115/8-12 7/8-12 117/8-12 1/2-12 221/2-12

SEAL-LOK SEAL-LOK lbf lbf-ft -ft (lbf -in) (lbf-in) (310) (310) (310) (310) (310) (310) (360) (360) (420) (420) 60 60 100 100 135 135 175 175 200 200 250 250 305 305 375 375

Nm Nm 20 20 20 20 20 20 40 40 46 46 80 80 135 135 185 185 235 235 270 270 340 340 415 415 510 510

TRIPLE-LOK TRIPLE-LOK FERULOK FERULOK PIPE PIPE FITTINGS FITTINGS lbf lbf-ft -ft Nm Nm (lbf -in) (lbf-in) (85) 10 (85) 10 (155) 18 (155) 18 (260) 29 (260) 29 (280) 32 (280) 32 (350) 40 (350) 40 (620) 70 (620) 70 85 115 85 115 135 183 135 183 175 237 175 237 200 271 200 271 250 339 250 339 305 414 305 414 375 509 375 509

SEAL-LOK SEAL-LOK lbf lbf--ftft (lbf in) (lbf--in) (310) (310) (310) (310) (310) (310) (360) (360) (420) (420) 60 60 100 100 135 135 175 175 200 200 250 250 305 305 375 375

3.111

Nm Nm 20 20 20 20 20 20 40 40 46 46 80 80 135 135 185 185 235 235 270 270 340 340 415 415 510 510

TRIPLE-LOK TRIPLE-LOK FERULOK FERULOK PIPE PIPE FITTINGS FITTINGS lbf ft lbf--ft Nm Nm (lbf in) (lbf--in) (60) 7 (60) (100) 11 (100) 11 (180) 20 (180) 20 (250) 28 (250) 28 (350) 40 (350) 40 (620) 70 (620) 70 85 115 85 115 135 183 135 183 175 237 175 237 200 271 200 271 250 339 250 339 305 414 305 414 375 509 375 509

PLUGS

HOLLOW HEX

HEX HEAD

HP5ON-S

P5ON-S

lbf--ft (lbf--in) (30) (55) (120) (170) (410) 60 100 135 175 200 250 305 375

Nm 3.5 6 13.5 19 46 80 135 185 235 270 340 415 510

lbf-ft (lbf-in) (85) (155) (260) (280) (350) (620) 85 135 175 200 250 305 375

Nm 10 18 29 32 40 70 115 183 237 271 339 414 509

Lubrication and Maintenance

Tigercat T726G Trencher

EATON Aeroquip

ASSEMBLY TORQUE

Recommended Parallel Connection Assembly torque

Eaton recommends that a Torque wrench be used to assure proper fitting assembly of these connections.

Straight Thread O-Ring Boss Low Pressure with 37º (SAEJ514)

Straight Thread O-Ring Boss High Pressure with ORS (J1453)

Thread Size (inches) 3/8-24 7/16-20 1/2-20 9/16-18 3/4-16 7/8-14 1 1/16-12 1 3/16-12 1 5/16-12 1 5/8-12 1 7/8-12 2 1/2-12

Dash Size -03 -04 -05 -06 -08 -10 -12 -14 -16 -20 -24 -32

The values listed are for steel connections. Contact Teaton for torque values for other materials.

Jam Nut or Jam Nut or Straight Straight Fitting Torque Fitting Torque lb.-ft.

Newton Meters 8-9 12-13 13-15 18-20 14-15 19-21 23-24 32-33 40-43 55-57 43-48 59-64 68-75 93-101 83-90 113-122 112-123 152-166 146-161 198-218 154-170 209-230 218-240 296-325

ORS

Dash Size -04 -06 -08 -10 -12 -16 -20 -24

Dash Size -03 -04 -05 -06 -08 -10 -12 -14 -16 -20 -24

Thread Size (inches) 3/8-24 7/16-20 1/2-20 9/16-18 3/4-16 7/8-14 1 1/16-12 1 3/16-12 1 5/16-12 1 5/8-12 1 7/8-12

Jam Nut or Jam Nut or Straight Straight Fitting Torque Fitting Torque lb.-ft.

Newton Meters 8-10 11-16 14-16 20-22 18-20 24-27 24-26 33-35 50-60 68-78 72-80 98-110 125-135 170-183 160-180 215-245 200-220 270-300 210-280 285-380 270-360 370-490

SAE 37º (JIC) Thread Size (inches) 9/16-18 11/16-20 13/16-16 1-14 1 3/16-12 1 7/16-12 1 11/16-12 2-12

Swivel Nut Torque lb.-ft.

10-12 18-20 32-35 46-50 65-70 92-100 125-140 150-165

Swivel Nut Torque Newton Meters 14-16 24-27 43-47 62-68 88-95 125-136 170-190 204-224

Metric Thread Size mm M10x1 M12x1.5 M14x1.5 M16x1.5 M18x1.5 M20x1.5 M22x1.5 M26x1.5 M27x2 M33x2 M42x2 M48x2

Dash Size -04 -05 -06 -08 -10 -12 -16 -20 -24 -32

Thread Size (inches) 7/16-20 1/2-20 9/16-18 3/4-16 7/8-14 1 1/16-12 1 5/16-12 1 5/8-12 1 7/8-12 2 1/2-12

Swivel Nut Torque lb.-ft.

11-12 15-16 18-20 38-42 57-62 79-87 108-113 127-133 158-167 245-258

Swivel Nut Torque Newton Meters 15-16 20-22 24-28 52-58 77-85 108-119 148-154 173-182 216-227 334-352

BSPP Straight Adapter or Locknut Torque lb.-ft.

Newton Meters 13-15 18-20 15-19 20-25 19-23 25-30 33-40 45-55 37-44 50-60 52-66 70-90 55-70 75-95 81-96 110-130 96-111 130-150 162-184 220-250 170-192 230-260 258-347 350-470

Nominal Thread Size Straight Adapter or Locknut Torque inches** lb.-ft.

Newton Meters G1/8-28 13-15 18-20 G1/4-19 19-23 25-30 G3/8-19 33-40 45-55 G1/2-14 55-70 75-95 G3/4-14 103-118 140-160 G1-11 162-184 220-250 G1 1/4-11 170-192 230-260 G1 1/2-11 258-347 350-470 ** "G" denotes parallel threads, other than ISO 6149 (Port connection only)

Eaton Aeroquip Fluid Conveyance Products A-HOOV-MC001-E January 2005

3.112

Tigercat T726G Trencher

Lubrication and Maintenance

TIRE PRESSURES Manufacturer Bridgestone/Firestone

Inflation Pressure

Tire Size 20.5R25 24PRL2

psi

kPa

54

375

COMMON CONVERSIONS To Convert...

Into...

Multiply By

To Convert...

Into...

Multiply By

bar

psi

14.5

in

cm

16.39

cm3

in3

0.06102

°F

°C

(°F − 32) / 1.8

°C

°F

(°C × 1.8) + 32

lb

kg

0.4535

kg

lb

2.205

hp

kW

0.7457

kW

hp

1.341

US Gal

L

3.785

L

US Gal

0.2642

in

mm

25.4

mm

in

0.03937

lbf•ft

Nm

1.356

Nm

lbf•ft

0.7375

lbf

N

4.4482

N

lbf

0.22481

in Hg

psi

0.4912

psi

bar

0.06896

in H2O

psi

0.03613

3.113

3

3

Lubrication and Maintenance

Tigercat T726G Trencher

3.114