Tigercat T726G TRENCHER Operator's Manual SN 726T0501 - 726T0600 - PDF DOWNLOAD

T726G TRENCHER

OPERATOR’S MANUAL SERIAL NUMBER 726T0501 TO 726T0600

ISSUE 2.0, SEPTEMBER, 2015 Tigercat Industries Inc. P.O. Box 637 Brantford, Ontario Canada N3T 5P9 Tel: (519) 753-2000 Fax: (519) 753-8272

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Tigercat T726G Trencher TABLE OF CONTENTS

SECTION

INTRODUCTION.....................................................................................................................................................v STANDARDS, ROPS, FOPS, OPS........................................................................................................................ vi NON-APPROVED FIELD PRODUCT CHANGES................................................................................................. vii 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 Catalog....................................................................................................................................Part No. 45908A Vehicle Moving and Transporting Instructions..................................................................................Part No. 46336AMUL

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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: 726T0501 to 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. For manual part numbers, see the contents page in each manual.

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 should be 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.

Every effort is made to send out updates on a regular basis. If the machine in question was built after the release date of this manual and there is a discrepancy, call Tigercat service department. The release date appears on the first page.

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

Tigercat Industries Inc.

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Introduction

Tigercat T726G Trencher

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 ROPS, FOPS, OPS 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 that the certification of approval of the ROPS, FOPS, OPS structure will become void if any such modifications take place.

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

Both of the above are, provided that 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's cabs are designed to ROPS, FOPS, OPS standards so that 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 roll-over protective structures.

Tigercat Industries Inc.

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Tigercat T726G Trencher

Introduction

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: (i) 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. (ii) 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.

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Tigercat T726G Trencher SECTION 1 – SAFETY Read and understand this safety section prior to operating any equipment.

Read and understand all manuals for any attachment or accessories.

CONTENTS – SECTION 1

ISSUE 2.0, SEPTEMBER, 2015

BACKOVER ACCIDENTS, AVOIDING....................................................................................................... 1.7 BATTERY DISCONNECT SWITCH......................................................................................................... 1.11 BATTERY SAFETY.................................................................................................................................... 1.7 BEFORE WELDING................................................................................................................................. 1.16 BOOM CYLINDER LOCK, LIFT............................................................................................................... 1.17 CAB EXITS.................................................................................................................................................1.9 COOLING SYSTEM....................................................................................................................... 1.13, 1.32 DIESEL EXHAUST FLUID (DEF)............................................................................................................... 1.8 EMERGENCY CAB EXITS......................................................................................................................... 1.9 FIRE PREVENTION................................................................................................................................. 1.23 DRY CHEMICAL CLEANUP PROCEDURES....................................................................................... 1.27 WHAT TO DO AFTER A MACHINE FIRE HAS OCCURRED............................................................... 1.26 WHAT TO DO TO PREPARE FOR A MACHINE FIRE......................................................................... 1.24 WHAT TO DO WHEN A MACHINE FIRE OCCURS............................................................................. 1.25 FLUID INJECTION INJURY..................................................................................................................... 1.18 GREASE INJECTION INJURY................................................................................................................. 1.19 INTERLOCK SWITCHS, SAFETY............................................................................................................. 1.9 LIFT BOOM CYLINDER LOCK................................................................................................................ 1.17 LIGHTNING SAFETY AWARENESS LIGHTNING SAFETY........................................................................................................................... 1.20 WHAT IS A LIGHTNING STRIKE?........................................................................................................ 1.20 LIQUID STARTING AID.............................................................................................................................. 1.8 LOOSE CLOTHING HAZARD.................................................................................................................. 1.14 PARKING THE MACHINE........................................................................................................................ 1.11 RELEASING PILOT PRESSURE......................................................................................................... 1.11 PNEUMATIC GREASE GUNS, USING.................................................................................................... 1.19 PRIOR TO WELDING.............................................................................................................................. 1.16 PROTECTIVE CLOTHING/EQUIPMENT......................................................................................... 1.3, 1.19 REFUELLING.............................................................................................................................................1.8 RELEASING PILOT PRESSURE............................................................................................................. 1.11 SAFETY HAZARDS, OPERATING............................................................................................................ 1.6 SAFETY INTERLOCK SWITCHES ON DOORS....................................................................................... 1.9 SAFETY LABELS..................................................................................................................................... 1.28 SAFETY PRECAUTIONS, GENERAL....................................................................................................... 1.3 BACKOVER ACCIDENTS...................................................................................................................... 1.7 BATTERY SAFETY................................................................................................................................. 1.7 PROTECTIVE CLOTHING/EQUIPMENT............................................................................................... 1.3 SAFETY HAZARDS – OPERATING....................................................................................................... 1.6 VITON SEALS........................................................................................................................................ 1.6 WORKING WITH OIL............................................................................................................................. 1.5

1.1

Tigercat T726G Trencher

Safety

SAFETY PRECAUTIONS, OPERATING.................................................................................................... 1.8 CAB EXITS.............................................................................................................................................1.9 DIESEL EXHAUST FLUID...................................................................................................................... 1.8 LIQUID STARTING AID.......................................................................................................................... 1.8 PARKING THE MACHINE.................................................................................................................... 1.11 REFUELLING......................................................................................................................................... 1.8 SAFETY INTERLOCK SWITCHES........................................................................................................ 1.9 SEAT BELT.............................................................................................................................................1.8 TRAVELLING AND TRANSPORTING.................................................................................................. 1.11 TRENCHING......................................................................................................................................... 1.11 SAFETY PRECAUTIONS, SERVICING................................................................................................... 1.12 BEFORE SERVICING OR REPAIRING EQUIPMENT......................................................................... 1.12 CONNECTING BATTERY CABLES..................................................................................................... 1.12 DISCONNECTING BATTERY CABLES............................................................................................... 1.12 FLUID INJECTION INJURY.................................................................................................................. 1.18 GREASE INJECTION INJURY............................................................................................................. 1.19 HOT FLUIDS AND HOT MACHINE SURFACES, WARNING.............................................................. 1.13 LIFT BOOM CYLINDER LOCK............................................................................................................. 1.17 PRIOR TO WELDING........................................................................................................................... 1.16 WHEN SERVICING THE ELECTRICAL SYSTEM............................................................................... 1.12 SAFETY SYMBOLS................................................................................................................................... 1.3 SEAT BELT.................................................................................................................................................1.8 SIGNAL WORDS........................................................................................................................................ 1.3 TRAVELLING AND TRANSPORTING..................................................................................................... 1.11 VITON SEALS............................................................................................................................................ 1.6 WELDING, PRIOR TO............................................................................................................................. 1.16 WORKING WITH OIL................................................................................................................................. 1.5

1.2

Tigercat T726G Trencher

Safety

GENERAL SAFETY PRECAUTIONS

SAFETY SYMBOLS

Remember that 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 should always be followed and obeyed.

This safety alert symbol means Attention!

Become alert! Your safety is involved!

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

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

Follow all instructions from safety inspector and supervisors.

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

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.

WARNING

Do not let untrained persons operate the machine.

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.

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

These safety rules highlight both general and specific measures that the operator should 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.

1.3

Tigercat T726G Trencher

Safety

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

KEEP BACK

Do not jump off the machine at any time.

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

Do not use the steering wheel, seat armrest or joysticks as handles when entering or leaving the cab.

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.

Do not use the machine foot controls as a step.

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

DANGER

WARNING

ROTATING CUTTER

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

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

No attempt should be made to walk on angled steel surfaces or surfaces that are irregular in shape.

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

These anti-slip surfaces should be maintained on a regular basis. If the surface shows signs of wear, the anti-slip material must be replaced immediately.

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.

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.

1.4

Tigercat T726G Trencher

Safety

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.

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

WORKING WITH OIL Direct contact with oil implies a risk of skin complaints (example: eczema). Strict hygiene should always be observed.

To reduce the risk of fire, machines should be completely cleaned of debris at least daily, particularly around the engine exhaust components. Hydraulic oil leaks, excess grease, fuel and oil accumulation (including spillage) should be eliminated immediately, always turn OFF the engine before cleaning the machine.

Some advice which should be observed: • Oils used in this machine may be hot enough to cause serious burns.

• Avoid contact with oil, particularly heated oil.

• Oil on the skin should be washed off immediately with soap and water.

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

• Wear protective gloves. Hands should be clean before putting on gloves. Apply protective cream to the hands to make washing easier.

Machine should be washed completely at every major service.

• Don't put oily rags in your pockets.

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

• Oil soiled clothing should be changed as soon as possible.

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

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

• Cuts and abrasions must be attended to immediately. Clean them and apply first-aid.

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.

• Avoid breathing in oil fumes.

• Wash hands and arms frequently (example: at each meal break or as often as possible).

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

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

Read, understand and follow all general safety precautions specified by attachment manufacturer.

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, or other devices removed.

1.5

Tigercat T726G Trencher

Safety SAFETY HAZARDS – VITON SEALS 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).

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.

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

Maintain a distance of 3 m (10 ft) between the machine or boom and any power line carrying up to 50,000 volts or less plus 10 mm (½ in) for each additional 1,000 volts above the 50,000 volt level.

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

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

• Visually inspect any seals or gaskets which have suffered from heat; they will appear black and sticky.

If the machine must be transported, make sure that it is adequately secured to the transporting vehicle. Refer to TRANSPORTING INSTRUCTIONS in SECTION 2 of the OPERATOR'S MANUAL.

• If these are found, Do Not Touch!!!

• Determine the material composition of any seals or gaskets. If fluoro-elastomer 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.

Even though the brakes are fully engaged, block the wheels to prevent movement during transport.

Install the articulation lock bar whenever the machine is to be transported.

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

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.

• 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.

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 that 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 to operate the machine who may not be physically fit or who may be under the influence of alcohol or drugs.

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

When moving the machine, watch that 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.

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.

1.6

Tigercat T726G Trencher

Safety

WARNING

AVOID INJURY FROM BACKOVER ACCIDENTS Before moving the machine, be sure all persons are clear of the area.

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.

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

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

Read, understand and follow all general safety precautions specified by the battery manufacturer.

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

To avoid backover accidents:

Do not attempt to charge a frozen battery; it can explode.

• Keep the back-up alarm in working condition.

The back-up alarm must sound when the machine is moving in reverse.

• Always look around before you back up. Be sure that everyone is clear.

When servicing the electrical system, turn OFF the battery disconnect switch before removing the battery compartment cover. Remove the battery cables from the batteries disconnecting the negative (-) cables first. Perform the service work, then attach the battery cables reconnecting the positive (+) cables first.

• Use a signal person when backing up if 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.

Connect ground terminal last when reconnecting.

• Keep windows, mirrors and lights in good condition.

Do not short out battery terminals for any reason.

Serious burns or an explosion can result.

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

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.

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

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Tigercat T726G Trencher

Safety

Turn ON the engine by following the instructions in this manual. Refer to OPERATING THE MACHINE in SECTION 2 of the OPERATOR’S MANUAL.

OPERATING SAFETY PRECAUTIONS

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

S≤15 mg/kg

Turn OFF the engine when refuelling.

Do not ULTRA LOW SULFUR ONLY refuel the machine or workFUEL on the fuel system 36686AUNI R0 while smoking or near flames or sparks.

Never use a liquid starting aid to start an engine.

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

Before moving the machine to the work site, check to ensure that all doors, panels, and access covers are installed properly and secured.

36782BENG R0

FUEL NOZZLE HOLDING BRACKET 726GT-014

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 Center or doctor immediately. Do not induce vomiting. If in eyes rinse with water for 15 minutes. If on 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 diesel exhaust fluid (DEF) which meets ISO 22241 specifications. Never fill the DEF tank with any other fluid.

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

The operator's seat is equipped with lap and shoulder harness belts. 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.

1.8

Tigercat T726G Trencher

Safety

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

T726G-002

1. Left door, this is also the main point of entry and is the only door that should be used under normal operating conditions to enter or leave the cab. This door is equipped with a SAFETY INTERLOCK SWITCH. See SAFETY INTERLOCK SWITCHES ON DOORS in THIS SECTION.

ACTUATOR

2. Right 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 a SAFETY INTERLOCK SWITCH. ALWAYS turn OFF the engine before using the right door exit.

SWITCH

INTERLOCK SWITCH (LH DOOR SHOWN) SAFETY INTERLOCK SWITCHES ON DOORS: Both doors are equipped with safety interlock switches to prevent the machine from being operated while either of the doors are open (interlock system is turned off).

It is important that the operator of the machine be familiar with this emergency exit and how to use it.

Both exits should be checked to make sure that they are operational and will function in an emergency. The safety interlock mechanism on the cab doors must not be tampered with or compromised in any way.

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

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

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

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

To operate: Close both doors and press the interlock (pilot) reset switch .

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

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

The door safety interlock switches and the interlock (pilot) reset switch are a safety feature and their function must not be compromised in any way.

1.9

Tigercat T726G Trencher

Safety Machine operations should only be performed from the operator's seat.

Secure loose items in the cab.

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

Make sure all safety guards are installed and properly secured.

Do not open an escape hatch or the cab doors to increase ventilation when operating the machine.

Do not run the attachment until the machine is at the work site.

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

Never travel near co-workers or other pieces of equipment with the attachment running.

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

Never use the parking brake to slow down or stop the machine except in an emergency.

Keep the parking brake properly adjusted at all times.

Always rest the attachment on the ground when operation is stopped, regardless if the engine is running or turned off.

Do not allow people or other pieces of equipment near the machine when the attachment is running or during operation.

Use only prearranged and approved signalling practices.

Operate the machine only from a seated position in the operator’s seat.

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

When travelling, position the attachment and boom accordingly so as not to impair vision.

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

When travelling on slopes, travel straight up or down the slope to prevent roll-over.

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 run the engine when persons are on steps or in a doorway area.

• Serious injury or death could result from crushing.

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

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

NEVER travel across a steep slope or side hill: • If you travel across a moderate slope, NEVER make an uphill turn as this could cause a tip‑over situation.

• To avoid tip‑over, keep the attachment as low as possible to maintain a low center of gravity.

1.10

Tigercat T726G Trencher

Safety

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

726GT-003

726GT-004

ELECTRICAL BOX

ELECTRICAL BOX

Inspect cutting teeth, drum and attachment assembly.

Replace all worn teeth.

WHEN PARKING THE MACHINE: • Park on level ground and engage the parking brake.

• Do not park on a hillside or incline.

ON

• Lower the attachment onto the ground.

OFF

BATTERY DISCONNECT SWITCH

• Turn OFF the engine and release pilot system pressure by performing the following steps:

• Turn OFF the battery disconnect switch if the vehicle is to be parked for an extended period of time (Example - overnight).

1. Close both doors. Turn key switch to the RUN position. Do not start the engine.

Press the interlock (pilot) reset switch.

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. Whenever 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 SELECTIVE CATALYTIC REDUCTION SYSTEM in SECTION 3 for more information.

2. Fully apply brake foot pedal 50 times or more.

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

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

TRAVELLING AND TRANSPORTING 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 check to ensure that all doors, panels and access covers are installed properly and secured.

1.11

Tigercat T726G Trencher

Safety

SERVICING SAFETY PRECAUTIONS

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

Conduct maintenance inspections at least as frequently as recommended in SECTION 3 of THIS MANUAL. Install a DO NOT START ENGINE sign on the operator’s cab door and in the engine compartment when making repairs to the machine.

The charge air cooler, radiator and the engine cooling system should be cleaned and serviced at least daily to maintain moderate engine temperatures.

WARNING

Before servicing or repairing equipment: 1. Park the machine on level ground.

2. When working in the centre joint area attach the articulation lock bar. Refer to ARTICULATION LOCK BAR in SECTION 2 of the OPERATOR'S MANUAL for the procedure.

3. Lower the attachment to the ground.

This machine is equipped with a reversible cooling fan. Exercise care when working in this area with the engine running.

If the fan switch in the cab is in the AUTO position, the fan could turn ON and/or go into REVERSE mode without warning.

4. Apply the parking brake.

5. Turn OFF the engine.

6. Remove the ignition key.

7. Turn OFF the battery disconnect switch.

Some wiring on the machine is live even when the battery disconnect switch is off.

When servicing the electrical system: 1. Turn OFF the battery disconnect switch.

2. Remove the battery cables from the batteries disconnecting the negative (–) cables first.

3. Perform the service work.

4. Attach the battery cables reconnecting the positive (+) cables first.

5. Turn ON the battery disconnect switch.

1.12

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Safety

WARNING

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

Never use 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.

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

Turn OFF the engine. Only remove the radiator fill cap when cool enough to touch with bare hands.

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

Do not change any pressure or relief setting unless authorized instruction has been obtained.

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

WARNING

Pressure can be maintained in a hydraulic system long after the power source and pump have been shut down. 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.

Hot fluids 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)!

1.13

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Safety 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.

CAUTION Do not open cab doors or window screens (if applicable) when machine is on a slope.

The doors and screens are heavy and could swing out with considerable force.

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

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.

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.

FRONT CHASSIS

REAR CHASSIS

RETAINING PIN

LYNCH PIN LOCK BAR

726D-039

LOCK BAR IN LOCKED POSITION

To prevent accidental articulation of the machine and injury when working in the centre joint area, install the frame articulation lock bar between the frames and hold in place with the lynch pins provided.

LOWER PANELS

Never stand under an object supported with hydraulics. Always use safety stands or a locking device.

726GT-040

RIGHT SIDE

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

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

726GT-041

1.14

LEFT SIDE

LOWER PANELS

Tigercat T726G Trencher

Safety

If the engine is running inside a building, make sure sufficient ventilation is available to prevent a buildup 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 remove toxic exhaust fumes.

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

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.

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Tigercat T726G Trencher

Safety PRIOR TO WELDING

MULTI-PIN CONNECTOR

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.

Place the welding machine ground clamp as close to the work area as possible. Stray current can pass through bearings.

726GT-003

726GT-004 M726E-123

ELECTRICAL BOX

ELECTRICAL BOX

INSIDE RIGHT CAB DOOR

Disconnect the multi-pin connector from the XA2 A1 IQAN module located inside the right side cab door.

COMPUTER CONNECTORS

ON

OFF

Turn OFF the battery disconnect switch.

Disconnect the battery cables from the batteries, disconnecting the negative (–) cables first.

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

724G-019

BEHIND CONTROL PANEL

Disconnect the IQAN MD3 controller in the cab by unplugging the two connectors from the back.

You will need to remove the four control panel mounting bolts to gain access.

MULTI-PIN CONNECTOR MULTI-PIN CONNECTORS 724G-010

DISCONNECT ECU HARNESS

Disconnect the two multi-pin connectors from the engine ECU (electronic control unit) on the right side of the engine.

T726G-025

REAR SERVICE COMPARTMENT

Disconnect the DEF supply module by unplugging the multi-pin connector.

Remove the IQAN MD3 controller (module) fuse located on the fuse and relay panel in the cab.

MULTI-PIN CONNECTOR

724E-099

BEHIND CAB RIGHT SIDE

Disconnect the multi-pin connector from the XA2 A2 IQAN module located on the right side behind the cab.

When welding is complete, reconnect all connectors and install the IQAN MD3 controller (module) fuse. Attach the battery cables, reconnecting the positive (+) cables first. Turn ON the battery disconnect switch.

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Safety

LIFT BOOM CYLINDER LOCK

LIFT BOOM

Before performing work under the attachment or lift boom, make sure the attachment is firmly supported on level ground, on solid stands or, install lift boom cylinder lock.

CYLINDER

'T' HANDLE

724E-073

LIFT BOOM CYLINDER LOCK IN LOCK POSITION

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

Install 'T' handle retaining bolt through center hole.

Do not stand under the boom or attachment while doing this. Do not damage the piston rod when installing the boom lift lock. Turn off the engine, turn key back to RUN position, press the interlock reset switch to activate the pilot oil system.

SLOWLY lower the boom until the boom lift lock is securely in place.

INTERLOCK RESET SWITCH

CYLINDER LOCK

T724G-026

CYLINDER LOCK STORAGE

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

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

• Always install 'T' handle retainer bolt • Use only to support boom and attachment.

• Do not use to set hydraulic pressures.

T726G-006

CONTROL PANEL

To remove the boom lift lock, start the engine, press interlock reset switch and raise the boom completely. Without placing yourself under the boom or attachment, remove the 'T' handle retainer bolt, remove the boom lift lock and reinstall it on the inside of the rear service compartment door.

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Safety FLUID INJECTION INJURY

As always, the best defence against suffering the effects of fluid injection is to prevent the accident from occurring in the first place.

WARNING

When searching for possible fluid leaks:

Diesel fuel or hydraulic oil under pressure can penetrate the skin and could result in death or serious injury. 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.

• Never search for leaks with your bare hands.

Always wear thick protective gloves.

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 should occur, 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.

• Be sure to 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.

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

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

• Place the end of a long piece of wood in the suspected path of any fluid stream. Never use any part of your body.

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: • Turn OFF the engine and relieve all diesel fuel or hydraulic pressure before disconnecting any lines or otherwise working on the system.

In the event of any suspected fluid injection injury: • Report the injury to your supervisor immediately.

• Seek professional medical attention immediately.

• Never grab any hydraulic or diesel fuel connectors or hoses when they are subjected to pressure.

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

• Never use any hoses that you suspect could be defective.

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Safety

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.

• Make sure protective shrouds are installed 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.

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Safety

LIGHTNING SAFETY AWARENESS

LIGHTNING SAFETY 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.

Loggers can increase their chances of avoiding a lightning strike by following a few simple safety practices.

1. Designate a member of your crew to

WHAT IS A LIGHTNING STRIKE? 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.

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.

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 mi). 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 ft) within the soil around the strike point.

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.

• Monitor daily weather forecasts • Observe local weather conditions • Alert all other members of the crew when a possible lightning threat develops.

2. Don’t start or continue any work that cannot be stopped immediately, when a storm moves nearby.

3. 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.

4. Obey the rule – If you see lightning, Flee. If you hear thunder, Clear.

5. 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. Always follow step 4.

6. 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.

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.

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Tigercat T726G Trencher

Safety WHAT TO DO IF YOU ARE OUTSIDE AND SEE LIGHTNING OR HEAR THUNDER. If you can, get inside.

1. Run to the nearest building, motor vehicle or fully enclosed ROPS equipment cab immediately. Being anywhere outside is not safe.

2. If inside a building: • Do not watch the lightning storm from open windows or doorways. Stay in inner rooms.

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.

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

3. 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.

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.

• 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.

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.

• 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.

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.

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

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.

NOTE: 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.

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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.

If you are caught outside and have nowhere else to go.

1. Avoid wide-open areas where you project above the surrounding landscape.

• 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.

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

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

• Call your local emergency response telephone number immediately.

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

• If the victim has no pulse, their heart has stopped or they have stopped breathing, start cardiopulmonary resuscitation (CPR) or mouth‑to‑mouth resuscitation immediately.

Use a portable defibrillator if one is available.

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

6. Avoid entering any small enclosures or shelters.

• 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.

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

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

9. 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.

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

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

11. Do not use the telephone except for emergencies.

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Tigercat T726G Trencher

Safety 4. Clean out all accumulated debris 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.

FIRE PREVENTION

5. 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 any equipment.

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

It is impossible to prevent combustible debris from collecting in tight corners of the machine. This debris may cause a fire and when mixed with fuel, oil or grease in a hot or confined place, the danger of fire is greatly increased.

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

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

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

The following guidelines will help to keep your equipment up and running efficiently and keep the risk of fire to a minimum.

1. Maintain a charged fire extinguisher on the machine at all times and know how to use it.

2. 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 A/C CONDENSER, OIL COOLER AND RADIATOR in SECTION 2 of the OPERATOR’S MANUAL. 3. Blow off all 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 conditions where large amounts of combustible debris are present. Visual inspection after blow off to ensure thorough cleanliness is vital.

Engine exhaust systems provide numerous small pockets where combustible 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.

9. 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. Should any exhaust leaks or defective parts be found, repairs must be made immediately. Engine exhaust leaks can cause fires. Do not operate the machine until the exhaust leak is repaired.

10. 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. Should any exhaust leaks occur during operation, turn immediately and not put back to work until the necessary repairs have been completed.

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

12. Never leave the machine parked with the boom and attachment suspended off the ground. Should their supporting hydraulic hoses burn through during a fire, pressurized hydraulic oil may be injected into the fire and the boom and attachment will fall rapidly to the ground.

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Safety 13. Turn OFF the engine and turn the battery disconnect switch to the OFF position to de‑energize most electrical circuits.

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

17. 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.

18. Before starting repair work, such as welding, the surrounding area should be cleaned and a fire extinguisher should be close by.

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

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

NOTE: Equipment fires adversely affect your ability to work, may increase your insurance premiums dramatically or prevent you from obtaining insurance coverage at all.

WHAT TO DO TO PREPARE FOR A MACHINE FIRE: • Prevent the fire from happening in the first place by ensuring that all machine systems are frequently inspected and always well maintained.

• Make sure any hand held fire extinguishers are 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 extinguisher manufacturer's manual.

• Make sure any pressurized water systems on the machine (if applicable) are charged and in working order.

• Make sure you have the proper fire extinguishers on site. Most fires involving mobile equipment will be Class A or B. Dry chemical extinguishers should be rated ABC and pressurized water extinguishers should be rated A.

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

16. Be cautious when smoking. An open flame, a lighted cigarette, etc., should not be permitted around any vehicle, especially during fuelling operations or when the fuel system is open to the atmosphere or when servicing batteries.

• 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.

• Make sure the nozzle of any hand held extinguisher and pressurized water system (if applicable) available on the machine and at the work site fits within the fire extinguisher access holes in the doors of the machine.

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Tigercat T726G Trencher

Safety WHAT TO DO WHEN A MACHINE FIRE OCCURS

• Make sure your fire detection system* is in working order. Refer to FIRE DETECTION SYSTEM in SECTION 2 of the OPERATOR’S MANUAL.

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

• Ensure that your fire suppression system** is charged and in working order. Refer to FIRE SUPPRESSION SYSTEM in SECTION 2 of the OPERATOR’S MANUAL.

2. Turn OFF the engine.

3. Activate the fire suppression system**.

• Make sure you are familiar with the recommended procedures for fire contained in the emergency action plan of your company.

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

5. Turn OFF the battery disconnect switch.

• Make sure you 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 that:

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

7. 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.

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

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

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

23. Whenever 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.

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

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

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

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.

• Make sure you have received the training as outlined above, that you 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.

5. Be aware that 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.

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

6. If possible a dry chemical fire extinguisher or fire suppression system** should be used 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.

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Safety • 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.

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.

• 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.

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

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

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

3. Ensure that all extinguishers used in fighting the fire are replaced or recharged.

• 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.

822C-190

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.

• Ensure the machine and all components have cooled down sufficiently after a fire so that re-ignition does not occur.

• Remain with the machine until help arrives.

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Safety

DRY CHEMICAL CLEAN-UP 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.

3. In areas exposed to heat during the fire, the dry chemical powder will melt forming a coating that cakes or crusts on all surfaces.

The following are recommendations for the clean-up and neutralizing of areas exposed to dry chemical powder.

Workers performing this work should wear protective clothing, safety goggles and a fine particle dust mask to minimize their personal exposure to the dry chemical powder.

Ensure that all electrical systems have been completely de-energized prior to any clean-up.

1. 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.

2. In areas exposed to moisture, the dry chemical powder will combine with water to form a paste that is mildly acidic. Note that all surfaces covered by this dry chemical paste including electrical contacts are vulnerable to corrosive attack.

To neutralize the acidic paste on large surfaces, spray or wash these areas with a mixture of 3 parts hot water to 1 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 of electrical contacts should be done using an electrical contact cleaner that has no flash or fire point and is non-corrosive and non-conductive such as CRC Contact Cleaner 2000.

1.27

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.

Tigercat T726G Trencher

Safety

SAFETY LABELS

OPERATOR'S MANUAL LOCATION

SAFETY LABELS The following safety 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

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

USE THE SEAT BELT

Always read the operator's manual before operating the machine. Pay close attention to WARNINGS and HAZARD identifications. The operator's manual will help to understand how the machine works and how to properly operate the machine. In addition, read and understand all manuals for any attachments or accessories.

DO NOT OPERATE THE MACHINE until you have read and thoroughly understand the operator's manual and the fundamentals of operating the machine.

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

1.28

Tigercat T726G Trencher NO RIDERS

NO RIDERS INSIDE OR OUTSIDE OF THE MACHINE. 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.

Read and understand all service manual instructions before servicing this machine.

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.

1.29

Tigercat T726G Trencher

Safety EMERGENCY EXIT, CAB, RIGHT SIDE DOOR

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

Make sure all exit doors are functioning properly at all times.

Refer to CAB EXITS in THIS SECTION.

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! Before working in the center joint area, INSTALL THE CHASSIS 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 in SECTION 3 of THIS MANUAL for complete instructions.

1.30

Tigercat T726G Trencher

Safety

ENTANGLEMENT HAZARD

CUTTING HAZARD

36779BUNI R0

This label warns of an ENTANGLEMENT HAZARD (rotating parts) zone. Do not place hands or fingers near rotating parts such as pulleys, belts and drives which can cause entanglement of body parts resulting in serious injury.

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.

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

KEEP CLEAR of cutting hazards caused by rotating components.

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.

1.31

Tigercat T726G Trencher

Safety CRUSH HAZARD

EXPLOSIVE RELEASE OF HOT COOLING SYSTEM PRESSURIZED FLUID

33952AUNI R0

This label warns of the CRUSH HAZARD caused by the boom when it is not properly supported.

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 that the weight of the boom and attachment is resting on the ground. Properly support and brace the boom and turn off the engine before performing service work.

This label warns of a PRESSURE AND FLUID SPRAY HAZARD when the coolant in the radiator is hot.

DO NOT LOOSEN THE RADIATOR FILL CAP UNTIL COOL. Explosive release of fluids from the pressurized cooling system can cause serious burns.

Turn OFF the engine. Only remove the radiator fill cap when cool enough to touch with bare hands.

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

1.32

Tigercat T726G Trencher

Safety

EXPLOSION HAZARD

STORED ENERGY HAZARD

WARNING

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.

• STORED ENERGY HAZARD • THE ACCUMULATOR HAS 3000 PSI OF STORED ENERGY. SERVICING THE ACCUMLATOR BEFORE RELEASING PRESSURE COULD RESULT IN DEATH OR SERIOUS INJURY. • DO NOT SERVICE THE ACCUMULATOR BEFORE RELEASING PRESSURE BY APPLYING BRAKES 25 TIMES WITH ENGINE OFF. 39945BENG R0

This label warns of a STORED ENERGY HAZARD. The machine is equipped with accumulator(s) (located in the rear 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 RELEASING PILOT PRESSURE in THIS SECTION.

1.33

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 CUTTER – KEEP BACK

ENGINE IDLE

NOTICE

• DO NOT IDLE THIS ENGINE FOR MORE THAN 9 HOURS. • DAMAGE TO EMISSION CONTROL SYSTEM WILL RESULT.

63281BENG R0

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

This label warns of the ROTATING CUTTER hazard. All personnel must keep a safe distance from the trenching head when the cutter 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 attachment and failure to follow safety precautions can result in personal injury.

1.34

Tigercat T726G Trencher

Safety

FIRE PREVENTION!

CHECK DAILY

This label advises operators of the following:

In addition to the previous label It 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.

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

FIRE EXTINGUISHER ACCESS HOLE

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.

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 around the machine.

1.35

Tigercat T726G Trencher

Safety

1.36

Tigercat T726G Trencher SECTION 2 – CONTROLS AND OPERATION CONTENTS - SECTION 2

ISSUE 2.0, SEPTEMBER, 2015

A

ACCESS PANELS, ENGINE.................................................................................................................... 2.80 AIR CLEANER, ENGINE.......................................................................................................................... 2.88 AIR CLEANER UNLOADER VALVE........................................................................................................ 2.89 AIR COMPRESSOR – AIR SUPPLY........................................................................................................ 2.96 AIR CONDITIONER/HEATER.................................................................................................................. 2.19 AIR FILTER ELEMENTS.......................................................................................................................... 2.88 AIR FILTER RESTRICTION INDICATOR................................................................................................. 2.88 AIR INTAKE SYSTEM, ENGINE FILTER RESTRICTION INDICATOR.................................................................................................... 2.88 AIR PRECLEANER, ENGINE.................................................................................................................. 2.90 AIR SUPPLY DRAINING THE SYSTEM.................................................................................................................... 2.96 AIR VENTS..............................................................................................................................................2.20 ALARM LIGHT..........................................................................................................................................2.15 ARTICULATION LOCK BAR....................................................................................................... 2.111, 2.112 ATTACHMENT SIDE PLATE SELECTION.................................................................................................................... 2.93 SIDE PLATE SHIFT.............................................................................................................................. 2.93 WATER SPRAY SYSTEM COMPONENTS.......................................................................................... 2.92 AUXILIARY POWER SUPPLY, 12 VOLT........................................................................................ 2.12, 2.18 B

BATTERY DISCONNECT SWITCH......................................................................................................... 2.22 BLUETOOTH FUNCTIONS...................................................................................................................... 2.19 BOOM CONTROL – RIGHT HAND JOYSTICK....................................................................................... 2.12 BOOM CYLINDER LOCK...................................................................................................................... 2.112 BOOM LIFT..............................................................................................................................................2.12 BRAKE FOOT PEDAL.............................................................................................................................. 2.13 BRAKES...................................................................................................................................................2.13 C

CAB CONTROLS QUICK REFERENCE.................................................................................................. 2.10 CAMERA MONITOR................................................................................................................................ 2.24 SYSTEM COMPONENTS.................................................................................................................... 2.24 SYSTEM WIRING AND COMPONENT DESCRIPTION...................................................................... 2.25 CARE OF THE MACHINE...................................................................................................................... 2.104 CENTER JOINT LOCK BAR...................................................................................................................2.111 CIGAR/CIGARETTE LIGHTER................................................................................................................ 2.18 CLEANING A/C CONDENSER, AND COOLER PACKAGE..................................................................... 2.94 CLEANING INSTRUCTIONS FOR GLASS WINDOWS........................................................................ 2.107 COLD WEATHER STARTING................................................................................................................ 2.100 COMPUTER................................................................................................................................... 2.15, 2.33 ADJUSTMENT MENU.......................................................................................................................... 2.41 DRIVE LIMITER................................................................................................................................ 2.42 DRIVE SETTINGS............................................................................................................................ 2.42 FAN CLEAN DURATION................................................................................................................... 2.43 FAN CLEAN INTERVAL.................................................................................................................... 2.43 OIL GRADE SELECTION................................................................................................................. 2.44 ALERT MESSAGES............................................................................................................................. 2.70 CRITICAL MESSAGES........................................................................................................................ 2.57 DATE/TIME ADJUSTMENT.................................................................................................................. 2.51 DISPLAY ADJUSTMENT...................................................................................................................... 2.50 ENGINE COOLANT TEMPERATURE GAUGE.................................................................................... 2.37 ENGINE MENU..................................................................................................................................... 2.36 ENGINE MENU - ECO MODE FUNCTION.......................................................................................... 2.39

2.1

Tigercat T726G Trencher

Controls and Operation

ENGINE MENU - ENGINE FUNCTIONS.............................................................................................. 2.38 BOOST PRESSURE......................................................................................................................... 2.38 ENGINE HOURS............................................................................................................................... 2.38 ENGINE OIL TEMPERATURE.......................................................................................................... 2.38 ENG % LOAD................................................................................................................................... 2.38 FUEL RATE....................................................................................................................................... 2.38 FUEL TEMPERATURE..................................................................................................................... 2.38 OIL PRESSURE................................................................................................................................ 2.38 ENGINE MENU - FUEL INFORMATION FUNCTIONS TOTAL FUEL INFORMATION........................................................................................................... 2.39 TRIP FUEL INFORMATION.............................................................................................................. 2.39 ENGINE TACHOMETER GAUGE........................................................................................................ 2.38 ERROR MESSAGES............................................................................................................................ 2.66 FUEL GAUGE....................................................................................................................................... 2.40 DEF GAUGE..................................................................................................................................... 2.40 HYDRAULIC OIL TEMPERATURE GAUGE......................................................................................... 2.46 INFORMATION MENU......................................................................................................................... 2.45 CONTROL SYSTEM VOLTAGE........................................................................................................ 2.45 DRIVE PRESSURE.......................................................................................................................... 2.45 DRUM PRESSURE........................................................................................................................... 2.45 HYDRAULIC OIL TEMPERATURE................................................................................................... 2.46 MACHINE HOURS............................................................................................................................ 2.46 SERIAL NUMBER............................................................................................................................. 2.46 TRANSMISSION MOTOR SPEED................................................................................................... 2.45 IQAN MD3 CONTROLLER MAIN DISPLAY......................................................................................... 2.35 MAIN DISPLAY..................................................................................................................................... 2.33 MAIN MENU.........................................................................................................................................2.48 MAIN MENU - PREFERENCES MENU LANGUAGE ADJUSTMENT............................................................................................................. 2.53 MEASURE MENU................................................................................................................................. 2.49 MESSAGES..........................................................................................................................................2.56 MESSAGES - ALERT DIESEL EXHAUST FLUID LEVEL < 5%........................................................................................... 2.76 DIESEL EXHAUST FLUID LEVEL <10%.......................................................................................... 2.76 DIESEL EXHAUST FLUID LEVEL EMPTY....................................................................................... 2.76 DIESEL EXHAUST FLUID QUALITY................................................................................................ 2.77 DRIVE CHARGE FILTER BYPASS................................................................................................... 2.72 ENGINE AIR INTAKE FILTER RESTRICTED................................................................................... 2.72 ENGINE COOLANT TEMPERATURE HIGH.................................................................................... 2.75 ENGINE FAULT CODE MESSAGES - ALERT.................................................................................. 2.78 ENGINE VOLTAGE HIGH................................................................................................................. 2.75 ENGINE VOLTAGE LOW.................................................................................................................. 2.75 FIRE DETECTION SYSTEM MALFUNCTION.................................................................................. 2.72 FUEL LEVEL LOW............................................................................................................................ 2.73 FUEL - WATER IN FUEL................................................................................................................... 2.75 HARDWARE FAILURE - COUT........................................................................................................ 2.74 HARDWARE FAILURE - DIN............................................................................................................ 2.74 HARDWARE FAILURE - DOUT........................................................................................................ 2.74 HARDWARE FAILURE - VIN............................................................................................................ 2.74 HARDWARE FAULT - MD3............................................................................................................... 2.73 HARDWARE FAULT - XA2................................................................................................................ 2.73 MACHINE VOLTAGE HIGH.............................................................................................................. 2.72 MACHINE VOLTAGE LOW............................................................................................................... 2.73 MODULE HIGH SUPPLY VOLTAGE - ALERT.................................................................................. 2.79 MODULE HIGH TEMPERATURE - ALERT....................................................................................... 2.78 MODULE LOW SUPPLY VOLTAGE - ALERT................................................................................... 2.79 2.2

Tigercat T726G Trencher

Controls and Operation

MESSAGES - CRITICAL AFTERTREATMENT SYSTEM ENGINE IDLE TOO LONG............................................................. 2.63 AFTERTREATMENT SYSTEM TECHNICAL FAILURE.................................................................... 2.63 ENGINE COOLANT LEVEL LOW..................................................................................................... 2.62 ENGINE COOLANT TEMPERATURE HIGH.................................................................................... 2.61 ENGINE COOLANT TEMPERATURE HIGH - ENGINE DERATE.................................................... 2.61 ENGINE COOLANT TEMPERATURE HIGH - ENGINE DERATE.................................................... 2.61 ENGINE FAULT CODE MESSAGES - CRITICAL............................................................................. 2.65 ENGINE LOCKED OUT.................................................................................................................... 2.64 ENGINE OIL PRESSURE LOW - ENGINE DERATE........................................................................ 2.65 ENGINE RESTARTS REMAINING UNTIL ENGINE LOCKOUT....................................................... 2.64 ENGINE TORQUE DERATE ACTIVE............................................................................................... 2.63 FIRE DETECTED.............................................................................................................................. 2.59 HARDWARE FAULT - ENGINE......................................................................................................... 2.60 HARDWARE FAULT - MD3............................................................................................................... 2.60 HARDWARE FAULT - XA2................................................................................................................ 2.60 HYDRAULIC OIL LEVEL LOW.......................................................................................................... 2.58 HYDRAULIC OIL RETURN FILTERS BYPASSED........................................................................... 2.59 HYDRAULIC OIL TEMPERATURE HIGH......................................................................................... 2.58 MESSAGES - ERROR CURRENT OUTPUT ERROR (COUT)............................................................................................. 2.69 DIGITAL INPUT ERROR (DIN)......................................................................................................... 2.69 DIGITAL OUTPUT ERROR (DOUT)................................................................................................. 2.69 MODULE NO CONTACT ERROR.................................................................................................... 2.67 MODULE VREF ERROR.................................................................................................................. 2.68 VOLTAGE INPUT ERROR (VIN)....................................................................................................... 2.69 PREFERENCES MENU....................................................................................................................... 2.50 COMPUTER CONTROL SYSTEM........................................................................................................... 2.34 COOLER PACKAGE................................................................................................................................ 2.94 D

DEF (DIESEL EXHAUST FLUID), TANK.................................................................................................. 2.84 DIESEL EXHAUST FLUID (DEF) LEVEL MESSAGES............................................................................ 2.76 DIESEL EXHAUST FLUID (DEF) QUALITY MESSAGES....................................................................... 2.77 DIESEL EXHAUST FLUID (DEF) TANK................................................................................................... 2.84 DRIVE CONTROL.................................................................................................................................... 2.13 DRUM WATER SPRAY SYSTEM............................................................................................................ 2.91 E

ECO MODE..............................................................................................................................................2.39 ENGINE RPM......................................................................................................................................................2.16 STARTING............................................................................................................................................2.99 STARTING IN COLD WEATHER........................................................................................................ 2.100 ENGINE ACCESS PANELS..................................................................................................................... 2.80 ENGINE AIR PRECLEANER................................................................................................................... 2.90 HOW IT WORKS.................................................................................................................................. 2.90 ENGINE DIAGNOSTICS CONNECTION................................................................................................. 2.23 ENGINE FAULT CODE MESSAGES - ALERT......................................................................................... 2.78 ENGINE FAULT CODE MESSAGES - CRITICAL.................................................................................... 2.65 ENGINE, HOT WATER SHUT-OFF VALVE.............................................................................................. 2.21 ENGINE LOAD – %.................................................................................................................................. 2.38 ENGINE, RESTARTING AFTER RUNNING OUT OF FUEL.......................................................... 2.10, 2.23 ENGINE, STARTING IN COLD WEATHER............................................................................................ 2.100 ENGINE, STOPPING............................................................................................................................. 2.103 F

FAN..........................................................................................................................................................2.94 FAN SWITCH (ENGINE COOLING)......................................................................................................... 2.18

2.3

Tigercat T726G Trencher

Controls and Operation

FILTER HYDRAULIC RETURN......................................................................................................................... 2.87 FILTER - CAB FRESH AIR....................................................................................................................... 2.20 FILTER, RECIRCULATING AIR - A/C UNIT............................................................................................. 2.20 FIRE DETECTION SYSTEM.................................................................................................................... 2.28 AVOIDING DAMAGE AND FALSE SIGNALS....................................................................................... 2.30 SYSTEM TEST..................................................................................................................................... 2.29 FIRE EXTINGUISHER............................................................................................................................. 2.21 FOOT CONTROL, CENTER.................................................................................................................... 2.13 FOOT PEDAL, BRAKE............................................................................................................................. 2.13 FOOT PEDAL, DRIVE SPEED................................................................................................................. 2.13 FUEL REFUELLING....................................................................................................................................... 2.83 FUEL TANK..............................................................................................................................................2.83 FUSES AND RELAYS BATTERY COMPARTMENT................................................................................................................. 2.27 CAB......................................................................................................................................................2.26 H

HEAD TILT...............................................................................................................................................2.12 HOT WATER SHUT-OFF VALVE (ENGINE)............................................................................................ 2.21 HYDRAULIC OIL HAND FILL PUMP....................................................................................................... 2.86 HYDRAULIC OIL TANK............................................................................................................................ 2.85 I

ICONS, PICTOGRAM DESCRIPTIONS.................................................................................................... 2.6 IGNITION KEY SWITCH.......................................................................................................................... 2.17 INSTRUMENT PANEL.............................................................................................................................. 2.15 INTERLOCK RESET................................................................................................................................ 2.15 IQAN MD3 CONTROLLER MAIN DISPLAY............................................................................................. 2.35 J

JOYSTICK, LEFT HAND.......................................................................................................................... 2.11 SPEED/DIRECTION CONTROL.......................................................................................................... 2.11 WHEN ROADING.............................................................................................................................. 2.11 WHEN TRENCHING......................................................................................................................... 2.11 JOYSTICK, RIGHT HAND........................................................................................................................ 2.12 BOOM CONTROL................................................................................................................................ 2.12 HORN...................................................................................................................................................2.12 SIDE PLATE SHIFT.............................................................................................................................. 2.12 WATER SPRAY.................................................................................................................................... 2.12 K

KEY SWITCH, IGNITION......................................................................................................................... 2.17 L

LIFT BOOM CYLINDER LOCK.............................................................................................................. 2.108 LIGHT - DOME......................................................................................................................................... 2.19 LIGHTS WORK...................................................................................................................................................2.18 LIGHT SWITCH, WORK........................................................................................................................... 2.18 M

MACHINE PREPARATION..................................................................................................................... 2.103 SYSTEM TEST AND WARM-UP........................................................................................................ 2.102 MD3 COMPUTER.......................................................................................................................... 2.33, 2.34 MD3 COMPUTER MAIN DISPLAY.......................................................................................................... 2.35 O

OPERATING THE MACHINE................................................................................................................... 2.97 P

PARKING BRAKE SWITCH..................................................................................................................... 2.17 PICTOGRAM DESCRIPTIONS.................................................................................................................. 2.6 PRECLEANER, ENGINE AIR.................................................................................................................. 2.90 PRE-START CHECKS............................................................................................................................. 2.97

2.4

Tigercat T726G Trencher

Controls and Operation

R

RADIO, AM/FM STEREO / CD PLAYER.................................................................................................. 2.19 REAR VIEW MIRROR.............................................................................................................................. 2.21 REFUELLING...........................................................................................................................................2.83 RELAYS AND FUSES.............................................................................................................................. 2.26 BATTERY COMPARTMENT................................................................................................................. 2.27 CAB......................................................................................................................................................2.26 RESTARTING AN ENGINE THAT HAS RUN OUT OF FUEL................................................................ 2.101 S

SEAT........................................................................................................................................................2.31 SIDE PLATE SHIFT – RIGHT HAND JOYSTICK..................................................................................... 2.12 SPEED/DIRECTION CONTROL.............................................................................................................. 2.11 WHEN ROADING................................................................................................................................. 2.11 WHEN TRENCHING............................................................................................................................. 2.11 STARTING THE ENGINE......................................................................................................................... 2.99 STEERING COLUMN............................................................................................................................... 2.14 STEREO RADIO/CD PLAYER................................................................................................................. 2.19 STOPPING THE ENGINE...................................................................................................................... 2.103 T

THROTTLE SPEED................................................................................................................................. 2.16 TOWING INSTRUCTIONS..................................................................................................................... 2.108 TRANSPORTING INSTRUCTIONS....................................................................................................... 2.110 U

USB PORT, MD3 COMPUTER................................................................................................................ 2.23 W

WATER SPRAY SYSTEM FILL CONNECTION/SHUT-OFF VALVE............................................................................................... 2.91 SHUT-OFF VALVE AND STRAINER.................................................................................................... 2.91 SPRAY NOZZLES................................................................................................................................ 2.92 STRAINER............................................................................................................................................2.91 SUPPLY PUMP AND RELIEF VALVE................................................................................................... 2.91 SYSTEM COMPONENTS.................................................................................................................... 2.92 WINDOWS.............................................................................................................................................2.104 CARE OF POLYCARBONATE WINDOWS........................................................................................ 2.104 CAUTIONS......................................................................................................................................2.106 CLEANING INSTRUCTIONS.......................................................................................................... 2.106 CONCEALING HAIRLINE SCRATCHES........................................................................................ 2.106 FIRE PRECAUTIONS..................................................................................................................... 2.106 GRAFFITI REMOVAL...................................................................................................................... 2.106 RESISTANCE TO CHEMICALS...................................................................................................... 2.105 RESISTANCE TO WATER.............................................................................................................. 2.105 CLEANING INSTRUCTIONS FOR GLASS WINDOWS..................................................................... 2.107 WORK LIGHTS SWITCH......................................................................................................................... 2.18

2.5

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.

Examples of these pictograms are the turtle speed such as SLOW =

and the rabbit

that are often used to describe

or FAST =

The pictograms used on this machine are as follows:

= Adjustment Menu

= Brake Pedal

= Air Conditioner ON

P =Air Conditioner OFF

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

= Air Source, Fresh Air

= Creep State – Speed Very Slow = Air Source, Recirculate

= Cigarette Lighter, 24 Volt

= Alert Message = Critical Message = 12V Power = Auxiliary Power Outlet 12V = Drum – Forward Rotation

= 24V Power = Auxiliary Power Outlet 24V = Battery

= Drum – OFF

= Battery Disconnect = Drum – Momentary Reverse = Boom DOWN

= Attachment Side Plates – Right Selected

= Boom UP

= Attachment Side Plates – Left Selected

= Attachment Tilt Backward

= Attachment Side Plates – Both Selected

= Attachment Tilt Forward 2.6

Tigercat T726G Trencher

Controls and Operation

= Drum Water Spray – Always ON

= Engine Run

= Drum Water Spray – OFF

= Engine Speed – rpm

= Drum Water Spray – AUTO On When Trenching

= Engine Start

= Diesel Exhaust Fluid (DEF, AUS32, AdBlue)

= Engine Stop

= Defrost, Front Window

= Engine Throttle

= 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)

= Fan Full ON

= Engine Anti-stall

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

= Fuel – Diesel

= Engine Emission System Temperature

= Fuel Heater

= Engine Oil Temperature

%

= Fan AUTOMATIC

= Fuel Information

= Engine – Percentage of Load

= Fuel Reset 2.7

Tigercat T726G Trencher

Controls and Operation = Fuel Temperature

LS

= Load Sense Pressure = Lubricate/Grease

= Hours – Engine

= Machine

= Hours – Machine

= Metric/Imperial Toggle

= Horn

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

= Switch OFF

= Lights – Low Beam

= Temperature

= Lights – ROAD

= Transmission Drive Motor Speed

= Lights – Reverse 2.8

Tigercat T726G Trencher

Controls and Operation

= Roadway Travel Mode

= Vacuum

2.9

Tigercat T726G Trencher

Controls and Operation

CONTROLS – CAB T726G-011

1

7

2 T726G-012

5

6

4 3

12 1 8

9

10

13

2 11

7

14

15

16

1.

2.

3.

4.

5.

6.

7.

8.

T726G-010

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

9.

10.

11.

12.

13.

14.

15.

16.

LH Joystick Seat RH Joystick Alarm Light Right Side Door Interlock Switch Control Panel Heater/AC Controls Pilot Manifold (Under Cab)

CAB COMPONENTS AND CONTROLS 2.10

Tigercat T726G Trencher

Controls and Operation

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.

FORWARD

1 COLLAR

NEUTRAL DETENT

45496AUNI R0

REVERSE 726GT-008

LEFT HAND JOYSTICK

1. SPEED/DIRECTION CONTROL 1a. When Roading (drum switch

OFF):

1b. When Cutting (drum switch

Lift the collar up to allow the joystick to move out of the neutral position. With the collar lifted, slide the joystick forward to put the machine into F (forward) drive mode, or slide 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 slid forward (forward drive speed) or 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 speed/direction joystick must be slid all the way forward or backward and the drive speed foot pedal pressed all the way down.

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

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 automatically travel.

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

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

2.11

Tigercat T726G Trencher

Controls and Operation C

A B

B

2

726GT-007 726GT-024

D 2

RIGHT HAND JOYSTICK

2. BOOM AND ATTACHMENT CONTROL AND SWITCHES FUNCTIONS

2b. Joystick Switches: A. Side Plate Selection (if equipped)

2a. Boom Control:

Push the switch to cycle/select either left , right or both side plates .

Your selection icons are displayed on the IQAN MD3 controller main display screen.

Boom Lift Move the joystick FORWARD to LOWER the boom.

B. Side Plate Shift (if equipped)

Move the joystick BACKWARD to RAISE the boom.

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

Attachment Tilt Move the joystick to the RIGHT to tilt the attachment FORWARD.

C. Horn

Move the joystick to the LEFT to tilt the attachment BACKWARD.

D. Water Spray – Trigger Switch

Push the switch to sound the horn.

Pull the trigger switch to cycle/select the water spray between ON (always on) OFF (always off) or AUTO (on when cutting) . Your selection icons are displayed on the IQAN MD3 controller main display screen.

2.12

Tigercat T726G Trencher

Controls and Operation

FOOT PEDALS AND FOOT REST 3

2

1

CENTER FOOT CONTROL - BRAKES T726G-014

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

1. DRIVE SPEED FOOT PEDAL

Under normal operating conditions the machine will brake automatically.

NOTE: There are three braking systems on this machine: • The hydrostatic braking system which is part of the drive system, works when the drive speed foot pedal (1) is released, this should be considered the primary brake.

RIGHT FOOT CONTROL – DRIVE CONTROL

• The rear axle brake is actuated by the foot pedal (2).

DRUM SWITCH

PARKING BRAKE SWITCH

T726G-006

• The parking brake is activated/deactivated by a switch on the instrument panel. It is a spring applied and hydraulically released brake assembly. Refer to PARKING BRAKE SWITCH in THIS SECTION. 3. FOOT REST

CONTROL PANEL

The drive speed foot 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 SPEED/DIRECTION CONTROL in THIS SECTION. NOTE: When the drum is ON the pedal does not perform any function.

2.13

Tigercat T726G Trencher

Controls and Operation STEERING COLUMN

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

1

Pull DOWN to activate the LEFT turn signal lights.

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

3

4. WIND SHIELD WIPER SWITCH

5

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

5. WIND SHIELD WIPER WASHER SWITCH

4 T726G-028

Push the button on end of lever to spray washer fluid on wind shield.

2

STEERING WHEEL

1. 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. TILT STEERING COLUMN Push in on the push button to release tilt lock, move steering wheel to desired position.

Release button to lock steering column in place.

2.14

Tigercat T726G Trencher

Controls and Operation

INSTRUMENT PANEL

1. IQAN MD3 CONTROLLER AND DISPLAY MODULE The IQAN MD3 controller 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. See MD3 COMPUTER ELECTRONIC CONTROL & DISPLAY later in THIS SECTION for complete details and operation instructions.

1 2

8 3

2. 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 module on the instrument panel.

9

4 5

10

6

11 12

7

Refer to the COMPUTER – MESSAGES in THIS SECTION.

13 14

3. INTERLOCK (PILOT) RESET SWITCH This is a two position switch and is used to reactivate the interlock system after it has been deactivated by opening either of the cab doors, or by turning the ignition switch to the STOP position. This system prevents accidental or improper use of the controls from anywhere but the operator's seat.

15

T726G-007

INSTRUMENT PANEL CONTROLS AND SWITCHES

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:

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

1. IQAN MD3 CONTROLLER AND DISPLAY MODULE

CAUTION

2. ALARM LIGHT

The steering system is always LIVE when the engine is running. DO NOT use the steering wheel to assist entering or leaving the cab.

3. INTERLOCK RESET SWITCH 4. THROTTLE SPEED SWITCH 5. DRUM SWITCH 6. PARKING BRAKE SWITCH 7. IGNITION KEY SWITCH 8. FAN SWITCH (Engine Cooling) 9. WORK LIGHTS SWITCH 10. BLANKS 11. HAZARD LIGHTS SWITCH 12. ROAD LIGHTS SWITCH 13. HIGH/LOW BEAM SWITCH 14. 12 VOLT AUXILIARY POWER SUPPLY 15. 24 VOLT LIGHTER

2.15

Tigercat T726G Trencher

Controls and Operation

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

1 2

4. THROTTLE 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.

8 3

Maintaining Correct Engine rpm.

9

It is most important that the rpm of the engine be correct at all times:

4 5

10

6

11

Low Idle 900 ±25 rpm (No Load)

12

High Idle 1850 ±25 rpm (No Load)

13

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

7

14

5. DRUM SWITCH This is a three position switch.

15

T726G-007

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.

INSTRUMENT PANEL CONTROLS AND SWITCHES

3A. INTERLOCK SYSTEM SHUT OFF Both doors are equipped with interlock switches to prevent the machine from being operated while the doors are open (interlock system shut off).

ON

– FORWARD ROTATION

M726E-046

3A

ACTUATOR

INTERLOCK SYSTEM SHUT OFF To operate: Close both doors then press and release the interlock reset switch.

CAUTION Place throttle at HIGH IDLE 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.

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

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

2.16

Tigercat T726G Trencher

Controls and Operation

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 the engine speed to idle for several minutes to allow the drum to slow down before turning the drum off.

6. PARKING BRAKE SWITCH P This is a two position switch which operates a driveline brake.

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

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

OFF

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

Drum is turned off, icon colour is grey.

MOMENTARY REVERSE

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

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.

M726E-046

Before using MOMENTARY REVERSE, place the throttle at LOW IDLE. Press and hold the MOMENTARY REVERSE switch.

INTERLOCK SWITCH

Release the MOMENTARY REVERSE switch to stop the drum rotation.

ACTUATOR

INTERLOCK SYSTEM SHUT OFF As part of the interlock system this machine automatically engages 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.

DRUM PRESSURE INDICATOR 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.

Refer to COMPUTER – MESSAGES – CRITICAL – INTERLOCK SYSTEM in THIS SECTION. 7. 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.

2.17

Tigercat T726G Trencher

Controls and Operation

NOTE: The MD3 Computer is programmed to reverse fan direction automatically when the fan switch is in the AUTO position. The default setting is reverse every 10 minutes for 10 seconds. The time setting is adjustable. Refer to COMPUTER, GENERAL SETTING to make adjustments to FAN CLEAN FREQUENCY and FAN CLEAN DURATION in THIS SECTION.

1 2

CLEAN – When the switch is pressed momentarily to the CLEAN position, the fan direction is reversed. Reverse direction is used to help clean the charge air cooler, radiator, oil cooler, 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.

8 3

9

4 10

5

11

6

12

7

13 14

It is also important to manually clean debris from the machine on a regular basis to maintain low machine operating temperatures.

Refer to CLEANING A/C CONDENSER AND COOLER PACKAGE in THIS SECTION.

15

T726G-007

INSTRUMENT PANEL CONTROLS AND SWITCHES

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

8. FAN SWITCH (Engine Cooling) This is a 3-position momentary switch. Along with the IQAN MD3 controller, this switch controls the operation of the variable pitch fan.

FULL ON

10. OPTIONAL SWITCH LOCATIONS 11. HAZARD LIGHTS This is a two-position switch. It is used to turn the hazard lights ON/OFF. 12. ROAD LIGHTS

AUTO CLEAN 724G-011

FULL ON – When the switch is in the FULL ON (override) position, the fan control system is overridden and the fan operates at full speed forward. The FULL ON position is intended for use in the event of a temporary failure of the fan control system. AUTOMATIC reversing/cleaning does not function in full on position.

This is a two-position switch. It is used to turn the road lights ON/OFF. 13. HIGH/LOW BEAM This is a two position switch. It is used to toggle between HIGH and LOW beam headlights.

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

15. CIGARETTE LIGHTER – 24 VOLT Cigar/cigarette lighter.

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

2.18

Tigercat T726G Trencher

Controls and Operation B

16

A

C

D

HANDS FREE MICROPHONE

726G-001

16. AM/FM STEREO RADIO/CD PLAYER With two front 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.

See the manufacturer's owners manual for complete operation instructions.

E M726E-050

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

BLUETOOTH FUNCTIONS 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.

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

B. Fan speed – OFF/LOW/MED/HIGH This is a rotary, four position switch for the fan speed.

See the manufacturer's owners manual for complete operation instructions.

C. Air Source – Two position 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.

17

D. Heat – Variable

18

This is a variable, rotary dial to adjust the amount of heated air for the cab. Make sure this control is off when using the air conditioning.

M726E-049

17. LIGHT – DOME

E. Air Conditioning – Variable

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

This is a variable, rotary dial to adjust the temperature of cooled air for the cab.

18. RADIO – CB (IF EQUIPPED)

NOTE: To maximize the efficiency of the air conditioning, the heat control dial on the control panel must be rotated to the OFF position. Refer also to HOT WATER SHUT‑OFF VALVE in THIS SECTION.

Consult the manufacturer's instruction manual for additional information.

IMPORTANT! It is recommended that when the A/C system is not in use, it is operated for a period of five minutes every two weeks. This circulates oil to all components of the system.

2.19

Tigercat T726G Trencher

Controls and Operation M726E-001

AIR INLET COVER

20

726E-037

FRESH AIR FILTER

21

22

A/C HEATER VENTS AND FILTER 20. AIR VENTS The Air Conditioner/Heater package has seven air outlets in the cab.

T726G-009

FILTER RETAINER

22. FILTER – CAB FRESH AIR

21. FILTER, RECIRCULATING AIR – A/C UNIT

Located at the top rear of the cab. When the air source control knob (C on previous page) on the A/C heater 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. It should be checked every 125 hours. This is done by removing six bolts and removing the air inlet cover. Next remove two bolts and remove the filter retainer. This allows access to the filter.

When the air source switch is in the recirc 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 unit, below the right arm rest of the operator’s seat.

It should be cleaned or replaced every 125 hours. Remove the two thumb screws in the filter box cover to access the filter.

The RECIRCULATING AIR FILTER and the CAB FRESH AIR FILTER may require cleaning more frequently under extreme operating conditions.

2.20

Tigercat T726G Trencher

Controls and Operation GAUGE

23 24

ENGINE

T724G-012

23. HOT WATER SHUT-OFF VALVE (ENGINE) To maximize the efficiency of the air conditioning, the heat control knob (D) on the A/C/heater control panel must be rotated to the OFF position. During times when cab heating is not required the hot water shut-off valve, on the heater hose from the engine, should also be closed to prevent hot water from seeping through the A/C unit, thereby reducing the effect of the cooling system.

B

A

C

T726G-010

24. FIRE EXTINGUISHER A portable fire extinguisher is located in the 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.

D

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

25

E M726E-050

T726G-011

FRONT OF CAB INTERIOR

25. REAR VIEW MIRROR A convex rear view mirror is located in the front of the roof to assist in the view out the rear windows. Use the mirror when driving the machine in reverse.

2.21

Tigercat T726G Trencher

Controls and Operation 26. DIESEL HEATER CONTROLS – (OPTIONAL)

HEATER

T724G 108

DIESEL HEATER FUEL TANK

1075-089

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

726GT 03

The heater is located in the battery compartment at the rear left of the vehicle.

1075-087B

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.

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.

2.22

Tigercat T726G Trencher

Controls and Operation 28

30

25

29

27

T724G 013

27. BATTERY DISCONNECT SWITCH This manually operated switch is located on the fuse and relay electrical box located in the battery compartment. It completely disconnects most electrical circuits on the machine from the battery.

T726G-021

28. FUSE PANEL – CAB The fuses, diodes, resistors and relays are located behind a panel below the instrument panel. Press the latch button to open the door to access the fuses, diodes, resistors and relays. See FUSE AND RELAY PANEL – CAB in THIS SECTION for more detail.

Turn the battery disconnect switch off if the vehicle is to be parked for an extended period of time (Example – 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. Whenever 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 SELECTIVE CATALYTIC REDUCTION (SCR) SYSTEM in SECTION 3 of THIS MANUAL for more information.

IMPORTANT! Only use the battery disconnect switch to turn off a running machine in an emergency. A fault code is logged by the ECU on the engine for improper shut down and power down.

CAB FUSE ACCESS

29. USB PORT – MD3 COMPUTER This USB port is used to access the MD3 computer. A laptop with appropriate IQAN software can be plugged into this port for software updates, diagnostics and some adjustments.

NOTE: This USB connection should 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.

30. ENGINE DIAGNOSTICS CONNECTION 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.

NOTE: This operation can only be performed by a trained service technician.

2.23

Tigercat T726G Trencher

Controls and Operation 31. CAMERA MONITOR

31

T726G-011

FRONT OF CAB INTERIOR

480-005

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.

480-006A

REAR CAMERA

T726G-029

CAMERA MONITOR SYSTEM COMPONENTS 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.

See 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.

2.24

Tigercat T726G Trencher

Controls and Operation

COLOUR LCD MONITOR

480-007B

CAMERA MONITOR SYSTEM WIRING AND COMPONENT DESCRIPTION 2.25

Tigercat T726G Trencher

Controls and Operation FUSES AND RELAYS

FUSE AND RELAY PANEL – CAB 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.

The cab fuse and relay panel is located in the compartment just below the instrument panel..

T726G-021

FUSES

38

47.

3A

29.

30A

15.

3A

1.

15A

30.

10A

16.

5A

2.

31.

25A

17.

10A

3.

32.

30A

18.

10A

4.

33.

10A

19.

10A

5.

15A

34.

3A

20.

20A

6.

20A

35.

5A

21.

15A

22.

3A

23.

20A

9.

15A

24.

20A

10.

10A

25.

15A

26.

5A

12.

5A

27.

10A

13.

10A

28.

44.

45.

5.1K 46.

5.1K

48.

49.

42

43

39

40

41

36

37

15A

7.

8.

11.

14.

12345678910 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 -

FUEL SHUT-OFF VALVE KEY ON SIGNAL BUSBAR A/C & HEATER RUN RELAY AIR RIDE SEAT CONTROLS BUSBAR WIPER SWITCH SPARE MD3 MODULE (CAB) XA2 MODULE (CAB) XA2 MODULE (REAR CHASSIS) SPARE SENSOR POWER BUSBAR TURN SIGNAL SWITCH SPARE (24V IGN POWER) A/C & HEATER FRESH AIR MOTOR DOME LIGHT/VOLTAGE CONVERTER KEY SWITCH CIGAR LIGHTER REFUELLING SYSTEM ENGINE DIAGNOSTIC CONNECTOR FRONT WORK LIGHTS REAR WORK LIGHTS ROAD/HAZARD LIGHTS JOYSTICK/HORN CAB STROBE LIGHT FIRE DETECTION START CAMERA MODULE MUSIC RADIO SPARE (12V IGN POWER) SPARE (12V IGN POWER) SPARE CB RADIO AUX POWER (12V IGN POWER)

RELAYS 36 37 38 39 40 41 42 43 -

DRIVE PREVENT PILOT INTERLOCK SPARE A/C OFF STARTER LOCKOUT SPARE SPARE SPARE

RESISTORS 44 45 46 47 48 49 -

SPARE FIRE DETECTION FIRE DETECTION SPARE SPARE SPARE

68566BENG R0

LABEL – FUSE AND RELAY PANEL – CAB

2.26

Tigercat T726G Trencher

Controls and Operation FUSE AND RELAY PANEL – BATTERY COMPARTMENT A fuse and relay panel is located in the electrical box in the battery compartment in the left rear corner of the machine.

T726G-016

BATTERY COMPARTMENT

18. 19. 20. 21.

22.

23. 24.

25. 26. 27. 28.

29. 30. 31.

32.

20A

20A

5A

5A

7.5A

30A

15A

30A

10A

20A

5A

33.

10. 11. 12. 13.

4

6

5.1K

1

8

14. 15. 16. 17.

5.1K

5

0.62K

3

5.1K

2

7

9

125A 34.

HYDRAULIC FILL PUMP RELAY

35.

36.

60A

125A

DIODE 1-

KEY ON SIGNAL

23456789-

FUEL HEATER ATS SENSORS/EXHAUST FLAP ECU AFTERRUN DEF HEATED LINES STARTER SOLENOID WATER PUMP REAR LIGHTS

RELAYS

RESISTORS 10 11 12 13 14 15 16 17 -

SPARE SPARE SPARE HYDRAULIC LOW LEVEL SWITCH RETURN FILTER BYPASS SWITCH CHARGE FILTER BYPASS SWITCH MD3 REAL TIME CLOCK (RTC) SPARE

FUSES

UNSWITCHED POWER FUSES 18 - AFTERRUN * ACCESSORY 19 - SPARE 20 - DEF HEATED LINES 21 - ECU 22 - MD3 REAL TME CLOCK (RTC) 23 - SPARE 24 - SPARE SWITCHED POWER FUSES 25 - FUEL HEATERS 26 - REAR LIGHTS/STROBE 27- WATER PUMP 28 - FILTER BYPASS SWITCHES 29 - HYDRAULIC LEVEL 30 - ATS SENSORS 31 - EXHAUST FLAP

JUNCTION 32 33 -

SPARE ECU POWER

FUSES 34 35 36 -

UNSWITCHED POWER HYDRAULIC FILL PUMP SWITCHED POWER

67882BENG R0

LABEL – FUSE AND RELAY PANEL – BATTERY COMPARTMENT 2.27

Tigercat T726G Trencher

Controls and Operation FIRE DETECTION SYSTEM

FIRE DETECTION SYSTEM COMPONENTS The fire detection system consists of the following main components:

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 given under FIRE PREVENTION in SECTION 1 of THIS MANUAL.

ALARM LIGHT

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

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

T726G-077

ALARM LIGHT AND AUDIBLE ALARM – in cab, alarm light is on the instrument panel. The audible alarm (not shown) is in the compartment below the instrument panel.

T726G-030

M726E-134

THERMOSTAT

IN CASE OF FIRE DETECTION ALARM: 1. Stop machine operation, park machine in a safe location and lower the load to the ground.

2. Turn OFF the engine.

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

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

HYDRAULIC PUMP COMPARTMENT HEAT THERMOSTAT – In hydraulic pump compartment.

5. Inspect the machine for cause of the alarm.

Refer to WHAT TO DO IN CASE OF A MACHINE FIRE and WHAT TO DO AFTER A FIRE in SECTION 1 of THIS MANUAL.

THERMOSTAT

T726G-031

ENGINE COMPARTMENT

HEAT THERMOSTAT – Rear left side, in engine compartment.

2.28

Tigercat T726G Trencher

Controls and Operation Weekly:

T726G-032

• Inspect all parts for damage, rust, corrosion or dirt. Replace any damaged parts immediately.

• All components are in place and unobstructed.

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

• Make sure thermostats are clean.

THERMOSTAT

Every Month: ENGINE COMPARTMENT

• Turn the ignition switch on. Next, use a heat source (heat gun) to apply heat to each of the thermostats (for approximately 30 to 40 seconds only) to confirm the alarm light and the audible alarm operate and that the following message displays on the computer screen.

HEAT THERMOSTAT – Rear right side, in engine compartment.

5A FUSE

M726E-134 T726G-021

FUSE PANEL – IN CAB

KEEP TIP OF HEAT GUN BACK 76.2–127 mm (3–5 in)

ELECTRICAL POWER SUPPLY Power is supplied to the system by a 5A fuse located in the cab fuse and relay panel.

HEAT GUN

SYSTEM TEST 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 activates the extinguishers.

THERMOSTAT

APPLY HEAT TO THIS AREA ONLY. WHEN TEST IS COMPLETE WIPE THERMOSTAT OFF WITH A COOL WET CLOTH.

Daily: • The following message is displayed on the computer screen if there is a bad connection within the system. Repairs should be made immediately.

726E-018

HEAT TESTING THERMOSTAT USING A HEAT GUN

NOTE: Do not use butane torches or any type of flame tool to heat-test the thermostats. The intense heat from a flame tool can damage the thermostats.

M726E-135

2.29

Tigercat T726G Trencher

Controls and Operation

ALARM LIGHT

T726G-010

T726G-077

FIRE EXTINGUISHER

FIRE DETECTION WARNING LIGHT

THERMOSTAT

T726G-032

ENGINE COMPARTMENT – RIGHT SIDE

THERMOSTAT

THERMOSTAT

T726G-030 724G-021

T726G-031 724G-061

ENGINE COMPARTMENT – LEFT SIDE 724G-001

PUMP COMPARTMENT – TOP BACK

FIRE DETECTION SYSTEM AND FIRE EXTINGUISHER LOCATION

AVOIDING DAMAGE AND FALSE SIGNALS DURING MACHINE SERVICE Pay attention to the location of the components of the fire detection system. Take care not to damage the thermostats or wiring, this includes hitting, cutting, bending, denting, etc. Damage to the thermostats 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.

In addition 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.

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

FIRE PREVENTION Refer to SECTION 1 of THIS MANUAL for fire prevention information/techniques.

2.30

Tigercat T726G Trencher

Controls and Operation

OPERATOR’S SEAT – AIR RIDE

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

SEAT ADJUSTMENTS

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

LUMBAR HORIZONTAL ADJUSTMENT (NOT SHOWN)

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

BACK ANGLE ADJUSTMENT

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

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

AIR RIDE ADJUSTMENT KNOB 720E-001

FORWARD/BACKWARD SLIDE LEVER

HEIGHT ADJUSTMENT LEVER

LUMBAR HORIZONTAL ADJUSTMENT

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

ADJUSTMENTS HEIGHT ADJUSTMENT PROCEDURES 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 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 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).

ARMREST ADJUSTMENT 332-6

VIEW FROM RIGHT REAR OF SEAT

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.

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

2.31

Tigercat T726G Trencher

Controls and Operation

BACK ANGLE ADJUSTMENT KNOB LUMBAR ADJUSTMENT

AIR RIDE ADJUSTMENT KNOB

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. Refer to height adjustment.

SEAT TOO HIGH/SEAT TOO LOW There are several things which can cause improper seat height. Refer to the HEIGHT ADJUSTMENT and adjust 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.

FORWARD/BACKWARD SLIDE LEVER M726E-033

HEIGHT ADJUSTMENT LEVER

SEAT ADJUSTMENTS

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 in a bucket. Refer to Height Adjustment and Ride Adjustment.

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.

Refer to height adjustment.

2.32

Tigercat T726G Trencher

Controls and Operation MD3 COMPUTER

COLOUR DISPLAY SCREEN

ARROW (SCROLL) UP OK (ENTER) ARROW (SCROLL) DOWN

F1

F2

F3

F4

ESC (BACK)

MAIN MENU

MD3 COMPUTER CONTROL PANEL AND DISPLAY SCREEN IQAN MD3 COMPUTER CONTROL PANEL AND DISPLAY SCREEN The MD3 computer control panel and display screen is the operator's interface with the electronic control system. The MD3 computer is the central unit in the control system which works as both a master controller and a display unit.

It has a 3.5" backlit colour graphic-transflective display for reading system information.

IQAN MD3 CONTROLLER

The front of the MD3 computer consists of a display screen and a control panel of nine buttons.

The buttons are arranged on the bottom and right side of the display screen.

T726G-007

• F1 through F4 function buttons: Programmed buttons that are configured by program software to display pages, adjustment groups or act as inputs.

• Up and down arrow buttons Navigation buttons that are used to scroll through selections on a menu page. The buttons are configured by program software to bring up a display page, an adjustment group or act as a virtual input.

• OK button Pushing this button equals 'Enter'. Saves the value or confirms the selection you have made.

• Main Menu button Always brings up the Main Menu page. It is not programmable.

• Esc or BACK button Returns you to the previous display page. It may be configured by program software to bring up a display page, an adjustment group or act as a virtual input.

2.33

Tigercat T726G Trencher

Controls and Operation 10

1 2

3

11 8

12

6 7

9

5

9

4

14 13 726GT-034

COMPUTER CONTROL SYSTEM COMPONENTS

COMPUTER CONTROL SYSTEM The computer control system is part of a network of components (shown above). The system is made up of the following components: 1. IQAN MD3 controller 2. Speed/Direction Control Joystick Handle – LH 3. Boom Control Joystick Handle – RH 4. XA2 A1 Cab Expansion Module 5. XA2 A2 Chassis Expansion Module 6. Engine Electronic Control Unit (ECU) 7. Pilot Manifold Valve Electronic Solenoids 8. Drive Pump Electronic Solenoids 9. Drive Motor(s) Electronic Solenoids 10. Attachment Pump Electronic Solenoids 11. USB Port 12. Engine Diagnostic Connector 13. Drive Motor Speed Sensor (Right side drive motor) 14. Drive Pressure Transducer (Right side drive motor)

NOTE: The computer control system is softwarebased. 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.

4

M726E-123

NOTE: Various controls, switches, and sensors are not shown.

The IQAN MD3 controller is the main controller in the system. The IQAN MD3 computer program is the operating system for the computer display as well as the control system for the machine operating parameters.

The engine electronic control unit (ECU) provides electronic information to the MD3 computer via the J1939 CAN BUS link. This information is displayed on the computer display.

INSIDE RIGHT CAB DOOR

5

724E-099

2.34

BEHIND CAB RIGHT SIDE

Tigercat T726G Trencher 1

Controls and Operation

2

4

3

5

6

67

86

22

9

21 20

10 19 11 12 18

13

14

15

T726G-086

16

17

MAIN DISPLAY

IQAN MD3 CONTROLLER MAIN DISPLAY 1. Interlock Reset – ON/OFF

12. Engine Menu – Press F1 to Select

2. Parking Brake – ON/OFF

13. Travel Speed – MPH or km/h When Trenching – FPM or m/min

3. Water Spray – ON/OFF/AUTO

14. Adjustment Menu – Press F2 to Select

4. Drum – FORWARD/OFF/REVERSE

15. ECO MODE – ON Indicator

5. Attachment Side Plates – Left/Right/Both

16. Information Menu – Press F3 to Select

6. Hydraulic Oil Filter Bypass Icon

17. Engine Coolant Temperature* Gauge and Icon

7. Speed/Direction – LH Joystick – Forward/Neutral/Reverse – FNR

18. Alarm Indicators – Press F4 to Select

8. Hazard Light Indicator – both Turn Signal Icons will flash when the switch is on.

20. Hydraulic Oil Temperature* Gauge and Icon

19. Hydraulic Oil Grade

9. Drum Pressure Gauge and Icon

21. DEF Fluid Level Indicator

10. Engine Tachometer Gauge and Icon – rpm

22. Fuel Level Gauge** and Icon

11. Lights – Left/Right Turn Signals

* NOTE: Gauge icon colour changes indicate temperature range: (blue = low, white = normal, red = high)

IMPORTANT! To prevent damage to the machine, it is not recommended to run the attachment circuit or work the machine hard when the hydraulic oil temperature gauge icon is blue, indicating cold oil.

** NOTE: Yellow fuel icon indicates fuel level is low.

2.35

Tigercat T726G Trencher

Controls and Operation ENGINE MENU

The engine functions on display are as follows: Charge Air Temperature – °C or °F Engine Coolant Temperature – °C or °F

From the Main Display press the F1 button to select the Engine Display.

Engine Oil Temperature – °C or °F

When selected, the Engine Menu icon is on display and the engine functions are also displayed.

Fuel Temperature – °C or °F Engine Speed – rpm Turbocharger Boost Pressure – psi or bar Engine Oil Pressure – psi or bar Engine Load – % Engine Hours – h ECU Voltage – V Fuel Rate – L/h or US gph (instantaneous)

The fuel information on display is as follows: Total fuel information Trip fuel information 2.36

Tigercat T726G Trencher

Controls and Operation 1. Charge Air Temperature

– °C or °F

This display indicates the charge air cooler temperature reading.

If temperature rises above the recommended temperature, alarm will sound, check the following: • Plugged cooler package air intake screens in doors access panel • Plugged charge air cooler.

Do not continue to operate machine.

Refer to CLEANING A/C CONDENSER, AND COOLER PACKAGE in THIS SECTION. Refer also to the COMPUTER – MESSAGES in THIS SECTION.

ENGINE FUNCTIONS Press the F1 button to toggle ECO MODE on and off.

2. Engine Coolant Temperature

– °C or °F

This display indicates the current engine coolant temperature.

Press the F2 button to toggle between metric and imperial units of measure.

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

Press the F3 button to select the fuel information display.

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

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

• Plugged oil cooler.

Do not continue to operate machine.

Refer to CLEANING A/C CONDENSER, OIL COOLER, RADIATOR AND CHARGE AIR COOLER in THIS SECTION.

LOW

NORMAL

HIGH

NOTE: Coolant temperature can also be monitored using the engine coolant temperature gauge shown on the main display.

Gauge symbol colour-changes indicate temperature range (blue = low, white = normal, red = high).

Refer also to the COMPUTER – MESSAGES in THIS SECTION.

2.37

Tigercat T726G Trencher

Controls and Operation 3. Engine Oil Temperature

– °C or °F

6. Boost Pressure

This display indicates air intake manifold boost pressure in psi.

This display indicates the current engine oil temperature.

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

7. Oil Pressure

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

Refer to the COMPUTER – MESSAGES in THIS SECTION.

• Plugged radiator.

8. Engine Load

Refer to CLEANING A/C CONDENSER, AND COOLER PACKAGE in THIS SECTION. Refer also to the COMPUTER – MESSAGES in THIS SECTION. 4. Fuel Temperature 5. Engine Speed

– rpm

–%

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

9. Engine Hours

–h

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

– °F or °C

This display indicates the fuel temperature.

– psi or bar

This display indicates engine oil pressure.

• Plugged cooler package air intake screens in doors and access panels DO NOT continue to operate machine.

– psi or bar)

10. ECU Voltage

– volts

This display indicates battery voltage levels as reported by the ECU.

This display indicates engine speed in rpm.

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

Maintaining Correct Engine rpm It is important that the engine speeds be correct at all times:

If battery voltage goes outside the normal range, an alarm will sound. Refer to COMPUTER – MESSAGES in THIS SECTION.

Cursor 8.7 Engine: Low Idle 900 +/- 25 rpm (No Load) High Idle 1850 +/- 25 rpm (No Load)

A reading in excess of 30 volts indicates a possible faulty voltage regulator.

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

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

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

IMPORTANT! 24 VOLT ELECTRICAL SYSTEM 11. Fuel Rate

– L/h or US gph

This display indicates the current rate of fuel consumption in gallons per hour.

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

2.38

Tigercat T726G Trencher

ECO MODE FUNCTION Press the F1 button to toggle ECO MODE on and off.

Controls and Operation

FUEL INFORMATION FUNCTIONS Press the F2 button to toggle between imperial and metric units of measure.

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

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

When ECO MODE is ON the icon is illuminated green and will also be shown on the main display.

Placing the engine in ECO MODE adjusts engine settings for higher fuel efficiency with a corresponding reduction in available engine horsepower.

Press the back button to return to the engine display.

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

1. 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 2. Trip fuel information 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 display.

Note that a yellow fuel symbol indicates fuel level low.

2.39

Tigercat T726G Trencher

Controls and Operation FUEL GAUGE

DEF GAUGE

DEF FLUID LEVEL INDICATOR

A DEF level indicator is shown on the main computer display, below the fuel gauge.

When DEF levels are low, information messages will be shown on the computer display.

Refer to DIESEL EXHAUST FLUID (DEF) TANK in THIS SECTION for tank capacities.

ICON FLASHES YELLOW WHEN FUEL LEVEL IS LOW

The fuel level gauge is shown on the main display.

The fuel level icon will flash yellow when the fuel level falls below 10% of full.

Refer to FUEL TANK in THIS SECTION for tank capacities.

2.40

Tigercat T726G Trencher ADJUSTMENT MENU

Controls and Operation The General Settings menu appears on the display. The selections available are as follows:

• Drive Limiter – ON/OFF

From the main display press F2 button to view the GENERAL SETTINGS.

• Fan Clean Interval– 1 to 20 minutes • Fan Clean Duration 10 to 30 seconds • Rear Door Lights – ON/OFF/AUTO (BACK-UP) • Wheel/Tire – Size • Oil Grade Selection • Attachment Selection (Drum Side Plates) – Manual Shift or Hydraulic Shift • Drum Speed – Forward - 5 to 100% • Drum Speed – Reverse - -5 to -25%

The current general settings displayed are as follows: • • • • • •

Use the up or down arrow buttons to scroll to the desired selection then press the OK button to make the selection and any adjustments necessary. Some functions are expanded on the following pages.

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)

To make changes to these settings and others Press the F1 button to select the General Settings menu from the Adjustment Menu.

2.41

Tigercat T726G Trencher

Controls and Operation DRIVE LIMITER

Press the OK button to make changes.

DRIVE LIMITER OPERATION The drive limiter control has two selections. These selections (ON/OFF) have no effect when the drum switch is in the OFF position.

Selecting the ON position (when the drum switch is also in the ON position) activates the drive limiting system. This system detects 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 attachment drum rotating. Serious component damage may result. Always stop the attachment drum with the engine at idle.

NOTE: When the drive limiter is actively limiting drive power the drive limiter icon on the main display will turn yellow.

The Drive Limiter ON/OFF menu will appear. Two choices are given, ON or OFF. Drive Limiter ON = Activates Drive Limiter Drive Limiter OFF = Deactivates Drive Limiter NOTE: See DRIVE LIMITER OPERATION for more details.

Use the up or down arrow buttons to scroll to the desired selection and press the OK button when desired mode is selected.

Press the back button to return to the General Settings menu. Press the arrow down to scroll to select Drive Settings and press the OK button to confirm your selection.

2.42

Tigercat T726G Trencher

Controls and Operation

FAN CLEAN INTERVAL

FAN CLEAN DURATION

Scroll to the Fan Clean Interval selection in the General Settings menu. Press the OK button to make adjustments.

Scroll to the Fan Clean Duration selection in the General Settings menu. Press the OK button to make adjustments.

The Fan Clean Interval menu appears. 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. Press the arrow up or arrow down to scroll to the desired selection and press the OK button when desired value is selected.

The Fan Clean Duration menu appears. 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 arrow up or arrow down to scroll to the desired selection and press the OK button when desired value is selected.

Press the back button to return to the General Settings menu. Press the arrow down to scroll to select Drive Settings and press the OK button to confirm your selection.

Press the back button to return to the General Settings menu. Press the arrow down to scroll to select Oil Grade Selection and press the OK button to confirm your selection.

2.43

Tigercat T726G Trencher

Controls and Operation OIL GRADE SELECTION

Scroll to the Oil Grade Selection in the General Settings menu. Press the OK button to make adjustments.

In the Oil Grade menu the available choices are: • ISO 22 • Petro Can MV 22 • ISO 32 • Petro Can MV 26 • ISO 46 • Esso Univis Ultra 46 • Petro Can MV 60 • ISO 68 Use the up or down arrow buttons to scroll to the desired selection then press the OK button to set selection.

Press the back button to return to the General Settings menu or back button twice to return to the Adjustment Menu. Press the Back button again to return to the Main Display.

2.44

Tigercat T726G Trencher

Controls and Operation

INFORMATION MENU

When selected the information functions displayed are as follows: Press the F3 button to access the information menu.

Control System Voltage – V Drum Pressure – bar or psi Transmission Motor Speed – rpm F

Drive Pressure – bar or psi Serial Number

Machine Hours – h Hydraulic Oil Temperature – °C or °F Cutter (Attachment) Functions Press the F2 button to toggle between imperial and metric units of measure.

Press the back button to return to the main display.

2.45

Tigercat T726G Trencher

Controls and Operation INFORMATION FUNCTIONS 1.

Control System Voltage – V

Hydraulic oil grade information is shown on the main display below the hydraulic oil temperature gauge.

This display indicates machine voltage readings which are voltage levels in the electrical control system.

Operating outside the recommended operating range will shorten hydraulic component life.

Refer to COMPUTER – ADJUSTMENT MENU – OIL GRADE SELECTION in THIS SECTION for hydraulic oil grade selection settings information.

Drum Pressure – bar or psi

2.

This display indicates drum pressure.

Transmission Motor Speed – rpm

3.

This display indicates transmission motor speed.

Refer also to HYDRAULIC OILS in SECTION 3 of THIS MANUAL for hydraulic oil operating range information.

Serial Number

4.

Refer also to COMPUTER – MESSAGES – CRITICAL – HYDRAULIC OIL TEMPERATURE HIGH in THIS SECTION for more information about the hydraulic oil temperature message.

This display indicates machine serial number.

5.

F

R

Drive Pressure – bar or psi

This display indicates drive pressure – Forward and Reverse.

6.

Machine Hours – h This display indicates the total number of hours the machine has run.

7.

Hydraulic Oil Temperature – °C or °F This display indicates the current hydraulic oil temperature registered in the main hydraulic 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 • 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: Hydraulic oil temperature can also be monitored using the hydraulic oil temperature gauge shown on the main display. Gauge symbol colour changes to indicate 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 main display of the computer, together with the operating range chart in SECTION 3 of THIS MANUAL to prevent damage to the hydraulic system.

2.46

Tigercat T726G Trencher

Controls and Operation

CUTTER (ATTACHMENT) FUNCTIONS Press the F1 button to select the Attachment Functions display from the Information Menu.

The following information will be on display: Drum Pressure Gauge – bar or psi Engine Speed – rpm Drum Speed – percentage

Press the F1 button to select the Attachment Drum Speed display.

The Attachment Drum Speed value is 5% to 100%.

This value is a percentage of maximum drum speed when the attachment is activated.

Press the back button to return to the Cutter (Attachment) Functions display or press the back button twice to return to the information menu.

Press the Back button again to return to the main display.

Hydraulic Oil Temperature – °C or °F Engine Coolant Temperature – °C or °F

2.47

Tigercat T726G Trencher

Controls and Operation MAIN MENU

Press the main menu button Menu screen.

to go to the Main

The Main Menu page displays the following selections: • Adjust – Select F1 • Measure – Select F2 • Preferences – Select F3 • Info – Select F4 To return to the Main Display press the back button.

2.48

Tigercat T726G Trencher

Controls and Operation

MEASURE MENU

The following menu items can be selected.

• Cutter (Attachment) Control From the Main Menu press the F2 button to access the Measure Menu.

• Voltage Inputs • Digital Inputs • Current Outputs • Digital Outputs • Engine/Emissions J1939 Inputs • Fan Control • Fault Management • Fuel Economy • Drives Use the up or down arrow buttons to select the menu item. Press OK to confirm the selection.

This menu is used by Tigercat service technicians.

Refer to SECTION 6 of the SERVICE MANUAL for more information.

Press the back button Main Menu page.

2.49

(or F1) to return to the

Tigercat T726G Trencher

Controls and Operation PREFERENCES MENU

From the Main Menu press the F3 button and the Preferences Menu page appears.

The following menu items can be selected.

DISPLAY ADJUSTMENT

After selecting F1 the display adjustment screen opens and the following adjustments can be selected: • RETURN TO MAIN MENU – Select F1 • BACKLIGHT ADJUSTMENT – Select F2 • SCREEN SAVER – Select F3 Backlight Adjustment

• Display – press F1 to select • Date/Time – press F2 to select • Language – press F3 to select Press the back button Menu screen.

to return to the Main After selecting F2 the backlight adjustment screen opens. Use the up or down arrow buttons to adjust the display backlight. The range is 10 to 100. The default setting is 100.

When the desired setting is selected press the OK button. A good rule to follow is the lower the number the longer the life of the display unit.

2.50

Tigercat T726G Trencher

Controls and Operation

Screen Saver Adjustment

DATE/TIME ADJUSTMENT

Select F3 to open the screen saver adjustment screen. Use the up or down arrow buttons to scroll through the choices. Three choices are available:

Press F2 to select the Date/Time adjustments in the Preferences Menu.

• SCREEN SAVER OFF • DIMMED – Time out 5 seconds • BLACK – Time out 5 seconds

The Date/Time menu screen turns on. Two choices are available for adjustment: DATE – Select F1 TIME – Select F2 After making a selection press the OK button to confirm selection and press the back button to return to the Main Menu screen.

2.51

Tigercat T726G Trencher

Controls and Operation Date Adjustment

Press F1 to select DATE. Use the up or down arrow buttons to scroll through the YEAR list to select the year. Press OK to confirm year selected.

When the year has been confirmed, the display

highlights the MONTH. Use the up or down arrow buttons to select the month. Press OK to confirm month selected.

When the month has been confirmed, the display highlights the DAY. Use the up or down arrow buttons to select the day. Press OK to confirm day selected.

The display returns to the Date/Time menu.

2.52

Tigercat T726G Trencher Time Adjustment

Controls and Operation LANGUAGE ADJUSTMENT

Select F2 Time adjustment from the DATE/TIME display screen.

From the Preferences Menu press the F2 button to access language selection screen.

Use the up or down arrow buttons to select the HOUR. Press the OK button to confirm selection.

The display shows the minutes highlighted.

The languages available for selection will be shown.

Use the up or down arrow buttons to move to the preferred language.

Press OK to confirm the selection.

The display will return to the Language Menu screen.

Press the back button to return to the Preferences Menu.

Use the up or down arrow buttons to select the minute. Press OK button to confirm the selection.

The display returns to the Date/Time menu screen. Press the back button to return to the Main Menu screen.

2.53

Tigercat T726G Trencher

Controls and Operation INFO MENU

From the Main Menu page press the F4 button (Info) and the Info Menu page appears.

MODULES

Press F1 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

The following menu items can be selected.

• Modules – Press F1 to select • Logs – Press F3 to select The machine ID information is displayed on the screen.

Shown above, the MD3 module has been selected. Specific information for the MD3 is displayed on the screen.

This menu is used by Tigercat service technicians.

Refer to SECTION 6 of the SERVICE MANUAL for more information.

Press the back button (F1) to return to the Main Menu screen.

2.54

Tigercat T726G Trencher

Controls and Operation

LOGS

Press F3 from the Info Menu page to select logs.

This menu lists System Logs and Hydraulic Logs and the number of records within each log. The records are a list of all the fault occurrences in each log.

Use the up or down arrow buttons to select the menu item. Press OK to view the selection and sort the information in a variety of ways.

The records are a list of all the fault occurrences in each log. Records 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 (or F1) to return to the Main Menu page.

2.55

Tigercat T726G Trencher

Controls and Operation MESSAGES The IQAN MD3 controller displays messages, activates the alarm and alarm light whenever a system fault occurs. Note that the computer control system automatically performs a bulb test at engine start-up to ensure the alarm and alarm light are functioning. Refer to STARTING THE ENGINE in THIS SECTION. There are different types of messages and they appear on the screen as a block message.

The types of messages are: • CRITICAL MESSAGE (RED) • ERROR MESSAGE (RED) • ALERT MESSAGE (YELLOW) 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 is 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 are displayed in order of highest priority.

2.56

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 the operator that immediate action must be taken to prevent damage to the machine or to ensure operator safety.

When a critical message is displayed, the alarm sounds continuously and the alarm light flashes continuously. The message remains on the screen until the operator hides it.

Critical messages flash the critical symbol above the F4 button when active messages are hidden. The symbol continues 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.

CRITICAL MESSAGE LIST: • Hydraulic Oil – Level Low • Hydraulic Oil – Temperature High • Return Oil Filters – Bypassed • Fire Detected The message gives brief details of the fault and advises what action is necessary.

• Hardware Fault – MD3 • Hardware Fault – Engine

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.

• Hardware Fault – XA2 • Engine Coolant Temperature High • Engine Coolant Temperature High – Engine Derate

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 TURN OFF THE ENGINE before serious machine damage can occur!

• Engine Coolant Level low • Aftertreatment System Technical Failure • Aftertreatment System Engine Idle Too Long • Engine Torque Derate Active • Engine Locked Out

Messages can be hidden by pressing the F2 button (Hide).

• Engine Restarts Remaining Until Engine Lockout • Engine Oil Pressure Low • Engine Oil Pressure Low – Engine Derate • Engine Oil Temperature High • Engine Fault Code Messages - Critical NOTE: Not all messages are shown.

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Tigercat T726G Trencher

Controls and Operation CRITICAL MESSAGES

Hydraulic Oil Hydraulic Oil

Temperature High.

Level Low.

HYDRAULIC OIL LEVEL LOW This message is displayed, alarm light flashes and alarm sounds when the main hydraulic tank oil level is low.

Turn OFF the engine immediately when this alarm is activated. Operating the machine with a low hydraulic oil level can cause hydraulic pumps to fail.

HYDRAULIC OIL TEMPERATURE HIGH This message is displayed, alarm light flashes and alarm sounds 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

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 tank to FULL mark on the monitor display gauge. Restart engine and inspect for leaks.

• 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 menu, together with the operating range chart in SECTION 3 of THIS MANUAL to prevent damage to the hydraulic system.

Hydraulic oil grade information is shown on the main menu below the hydraulic oil temperature gauge.

Operating outside the recommended operating range shortens hydraulic component life.

Refer to COMPUTER – ADJUSTMENT MENU – SERVICE SETTINGS – HYDRAULIC OIL GRADE in THIS SECTION for hydraulic oil grade selection settings information.

Refer also to APPROVED HYDRAULIC OILS in SECTION 3 of THIS MANUAL for hydraulic oil operating range information.

Refer to COMPUTER – INFORMATION MODE MENU – HYDRAULIC OIL TEMPERATURE in THIS SECTION for hydraulic oil temperature information display.

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Tigercat T726G Trencher

Controls and Operation

Return Oil Filters

Fire Detection System

Bypassed. Slowly warm up machine or service if already warm.

Fire Detected. When safe to do so, shutdown engine and exit cab.

HYDRAULIC OIL RETURN FILTERS BYPASSED This message is displayed, alarm light flashes and alarm sounds to inform the operator that the hydraulic oil is bypassing the return filters.

FIRE DETECTED This message is displayed, alarm light flashes and alarm sounds to inform the operator that the fire detection system has detected a fire.

This message may appear if the machine is cold.

If the machine has already been warmed up, then the machine should be serviced immediately.

Refer to FIRE DETECTION SYSTEM in THIS SECTION for more information.

NOTE: Hydraulic oil filter bypass icon will also be illuminated in yellow when the hydraulic oil temperature is low and red when hydraulic oil is at operating temperature.

Refer also to WHAT TO DO IN CASE OF A MACHINE FIRE and WHAT TO DO AFTER A FIRE in SECTION 1 of THIS MANUAL.

HYDRAULIC FILTER BYPASS (YELLOW)

HYDRAULIC FILTER BYPASS (RED)

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Tigercat T726G Trencher

Controls and Operation

Hardware Fault – MD3

Hardware Fault – XA2

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.

HARDWARE FAULT – MD3 This message is displayed, alarm light flashes and alarm sounds when a critical active hardware fault related to the MD3 Display module has been hidden.

HARDWARE FAULT – XA2 This message is displayed, alarm light flashes and alarm sounds when a critical active hardware fault related to the XA2 module has been hidden.

To recall the original active fault(s) the operator must turn the key off and on.

A VREF (modules reference voltage) error is an example of the type of hardware fault (original active fault) that triggers this message.

To recall the original active fault(s) the operator must turn the key off and on.

A VREF (modules reference voltage) and no contact errors are examples of the type of hardware fault which may be the original active fault which triggers this message.

Hardware Fault – Engine Active fault has been hidden. Turn key off and on to recall active hidden hardware faults.

HARDWARE FAULT – ENGINE This message is displayed, alarm light flashes and alarm sounds 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 key off and on.

No contact error is an example of the type of hardware fault (original active fault) that triggers this message.

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Tigercat T726G Trencher

Controls and Operation

SPN: 63011 1 of 1

Engine Coolant

Engine coolant temperature high.

Temperature High - Engine Derate

ENGINE COOLANT 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: ENGINE COOLANT TEMPERATURE HIGH This message will be displayed, alarm light flashes and alarm sounds when engine temperature exceeds recommended engine temperature.

•

When coolant temperature rises to 107°C (225°F) for more than 5 seconds the critical symbol

•

When this alarm is activated check for: • Plugged cooler package air intake screens in doors and access panels • Plugged radiator.

• Malfunction of the cooling fan Refer to CLEANING A/C CONDENSER, AND COOLER PACKAGE in THIS SECTION.

will flash.

When coolant temperature rises to 110°C (230°F) 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 (creep speed setting is programmed to suit each machine type/model). DO NOT continue to operate machine.

Safely stop the machine, idle the engine and turn the A/C off. If the engine coolant temperature reading does not return to normal operating levels turn OFF the engine and perform further cooling system checks. Refer also to 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.

•

When coolant temperatures fall below 106°C (223°F) for more than 5 seconds this message will be turned off and the engine will be allowed to increase rpm.

NOTE: An Engine Torque Derate Active message will also be triggered as the engine begins to derate. Refer to COMPUTER – MESSAGES CRITICAL – ENGINE TORQUE DERATE ACTIVE in THIS SECTION.

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Controls and Operation

WARNING Engine Coolant Level Low. Do not remove the radiator fill cap when the engine is hot, release of pressurized coolant can cause serious burns.

Turn OFF the engine. Only remove the radiator fill cap when cool enough to touch with bare hands.

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

ENGINE COOLANT LEVEL LOW This message will be displayed, alarm light flashes and alarm sounds 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, turn OFF 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 of THIS MANUAL.

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Tigercat T726G Trencher

Controls and Operation

Aftertreatment System

Aftertreatment System

Technical failure severe. Engine lockout may occur after full torque derate and 3 engine restarts.

Engine idle too long. Shutdown engine to prevent damage to emission control system.

AFTERTREATMENT SYSTEM TECHNICAL FAILURE SEVERE This message will be displayed, alarm light flashes and alarm sounds when an aftertreatment technical fault is detected. Action to correct the problem should be taken immediately to avoid affecting engine performance and damage to the diesel oxidation catalyst /selective catalytic reduction (DOC/SCR) aftertreatment system components.

AFTERTREATMENT SYSTEM ENGINE IDLE TOO LONG This message will be displayed, alarm light flashes and alarm sounds when this engine has idled for more than 9 consecutive hours. Shutdown engine to prevent damage to the emission control system.

IMPORTANT! Engine should not idle longer than 9 consecutive hours. 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 will generate excess heat which will cause damage to emission control system components.

This message results in the following derate sequence if no action is taken to correct the problem: • Beginning immediately after an aftertreatment system technical message there will be a a ramp down of Torque by 25% over 25 minutes.

• After one hour at reduced torque there will be a ramp down of Engine Speed by 60% and Torque by 65% over 40 minutes.

• After 50 minutes at derated engine speed and torque the engine is derated to idle within 30 minutes.

SPN: 62191 1 of 1 Engine torque derate active.

• Some less severe technical faults can be fixed at any time, even after then engine has been fully derated to idle speed.

• More severe technical faults will result in an engine lockout when the engine has derated to idle and there have been three restarts (redetects). Once locked out the engine will only operate at idle. Action to correct the original cause(s) of the lockout must be taken before the engine can be reset. Contact dealer to reset engine lockout for normal operation. Refer to COMPUTER – MESSAGES – CRITICAL – ENGINE LOCKED OUT and ENGINE RESTARTS REMAINING UNTIL ENGINE LOCKOUT in THIS SECTION. Identify the cause of the technical failure and take action to correct the problem.

Refer to AFTERTREATMENT SYSTEM in SECTION 3 of THIS MANUAL for more information.

ENGINE TORQUE DERATE ACTIVE This message will be displayed, alarm light flashes and alarm sounds when the engine ECU has derated the engine. The code for a Torque Derate/ Diesel Exhaust Fluid Empty is shown above as an example.

Refer to Tigercat Fault Codes Manual for code information to identify the cause(s) of engine derating and more information regarding failure cause and repair.

Refer to the engine OPERATION AND MAINTENANCE MANUAL for code information.

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Tigercat T726G Trencher

Controls and Operation

Engine

Engine

Engine locked out. Engine derate to 0% Torque and 850 rpm. Contact Dealer

3 restarts remaining until engine lockout.

ENGINE LOCKED OUT This message will be displayed, alarm light flashes and alarm sounds when an engine is locked out by the computer system to prevent further damage to the engine and aftertreatment system.

NOTE: 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 idle. Action to correct the original cause(s) of the lockout must be taken before the engine can be reset. Contact dealer to reset engine lockout for normal operation.

ENGINE RESTARTS REMAINING UNTIL ENGINE LOCKOUT This message will be displayed, alarm light flashes and alarm sounds to inform the operator of the number of restarts available before the engine is locked out.

NOTE: 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.

Refer to ENGINE MANUAL for code information.

Refer to COMPUTER – MESSAGES – CRITICAL – ENGINE RESTARTS REMAINING UNTIL ENGINE LOCKOUT in THIS SECTION.

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Tigercat T726G Trencher

Controls and Operation

Engine Oil Pressure

SPN: 4645 1 of 1

Oil Pressure Low - Engine Derate

Contact dealer.

ENGINE OIL PRESSURE LOW – ENGINE DERATE This message will be displayed, alarm light will flash and alarm will sound when an 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.

ENGINE FAULT CODE MESSAGES - CRITICAL Critical engine fault message(s) will be displayed, alarm light flashes and alarm sounds 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).

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 (creep speed setting is programmed to suit each machine type/ model). DO NOT continue to operate machine.

Safely stop the machine and turn OFF the engine. Refer also to 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 be allowed to increase rpm.

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.

An example of a critical engine fault message is shown above.

Note that 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 the engine OPERATION AND MAINTENANCE MANUAL for specific information regarding the engine and aftertreatment system.

NOTE: An Engine Torque Derate Active message will also be triggered as the engine begins to derate. Refer to COMPUTER – MESSAGES CRITICAL – ENGINE TORQUE DERATE ACTIVE.

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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 operator that immediate action must be taken to prevent damage to machine or to ensure operator safety.

Error messages are activated whenever a fault such as an electrical connection is broken/ disconnected. Most error messages are due to computer system hardware or connection faults.

A list of some types of ERROR MESSAGES is as follows: • Module No Contact Error • Module VREF Error • Voltage Input Error (VIN)

When an error message is displayed, the alarm sounds continuously and the alarm light flashes continuously. The message remains on the screen until the operator hides it.

• Digital Input Error (DIN) • Digital Output Error (DOUT) • Current Output Error (COUT)

The message will give brief details of the fault and advise what action is necessary.

NOTE: Not all error messages are shown.

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.

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 turn OFF the engine before serious machine damage can occur!

Messages are acknowledged by pressing the F2 button (OK). To recall active messages turn key 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 symbol 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.

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Tigercat T726G Trencher

Controls and Operation

ERROR MESSAGES

XA2-A0

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.

XA2-A1

NOTE: If the MD3 display module 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.

XA2-A1- Module 2 - Rear Chassis No contact

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.

J1939-B0

FPT Engine No contact

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Tigercat T726G Trencher

Controls and Operation MODULE VREF ERROR The module VREF message will be displayed to indicate a problem related to the 5V reference signal coming from the module.

Display

The module is identified on the display screen.

VREF error

MD3

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

XA2-A0- Module 1 - Cab VREF error

XA2-A1

XA2-A1- Module 2 - Rear Chassis VREF error

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Tigercat T726G Trencher Module 2- Rear Chassis Pin C1:13

Hyd. Oil Temp VIN High 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.

VOLTAGE INPUT ERROR (VIN) 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.

The display is similar to the voltage input error message shown above.

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 – ALERT – HARDWARE FAILURE in THIS SECTION.

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 above.

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 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 above.

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Tigercat T726G Trencher

Controls and Operation ALERT MESSAGES (YELLOW)

There are two types of alert messages:

Alert messages advise the operator that machine operation is 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.

Alert messages give brief details of the fault and advises what action is necessary.

Action should be taken to service the machine and correct the problem at the earliest opportunity to prevent future damage to the machine.

Alert programmed messages are generally triggered by machine function related conditions.

When an alert message is displayed, the alarm sounds three times and the alarm light flashes three times to alert the operator of the message.

The message remains displayed until the operator hides it.

Messages are hidden by pressing the F2 button (Hide).

Alert messages flash the alert symbol above the F4 button when active messages are hidden.

Active messages that have been hidden can be reviewed by pressing the F4 button. The symbol continues to flash until the problem is resolved and the fault becomes inactive.

NOTE: If both a critical level fault and an alert level fault are present, the critical symbol takes priority until the critical fault becomes inactive.

Alert computer system-generated messages are generally triggered by computer system error and fault related conditions.

When a system-generated alert message is displayed, the alarm sounds three times and the alarm light flashes three times to alert the operator of the message.

The message remains displayed until the operator hides it.

NOTE: Active hardware fault alert messages are acknowledged by pressing the F2 button (OK). To recall these messages turn key off and on.

On-screen messages indicate to the operator that an active hardware fault has been hidden.

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Controls and Operation

INTERACTIVE ALERT MESSAGES • Engine Air Intake Filter Restricted • Drive Charge Filter Bypassed • Fire Detection System Malfunction • Machine Voltage High • Machine Voltage Low • Fuel Level Low • Hardware Fault – MD3 • Hardware Fault XA2 • Hardware Fault COUT • Hardware Fault DIN • Hardware Fault DOUT • Hardware Fault VIN • Engine Voltage Low • Engine Voltage High • Fuel Water In Fuel • Engine Coolant Temperature High • Diesel Exhaust Fluid Level <10% • Diesel Exhaust Fluid Level <5% • Diesel Exhaust Fluid Level Empty • Diesel Exhaust Fluid Quality • Engine Fault Code Messages – Alert Some types of computer system generated alert messages are listed below: • Module High Temperature – Alert • Module High Supply Voltage – Alert • Module Low Supply Voltage – Alert NOTE: Not all system generated alert messages are shown.

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Tigercat T726G Trencher

Controls and Operation

Engine Air Intake Filter

Fire Detection System

Restricted. Service Machine to correct.

Malfunction. System will not detect fire. Repair system immediately..

ENGINE AIR INTAKE FILTER RESTRICTED This message will be displayed when a signal is received from the restriction indicator switch on the engine air cleaner.

When this happens the engine air cleaner requires immediate service.

Refer to AIR CLEANER MAINTENANCE in SECTION 3 of THIS MANUAL.

FIRE DETECTION SYSTEM MALFUNCTION This message is displayed when an alert level malfunction is detected in the fire detection system Refer to FIRE DETECTION SYSTEM in THIS SECTION for more information.

Refer to WHAT TO DO IN CASE OF A MACHINE FIRE and WHAT TO DO AFTER A FIRE in SECTION 1 of THIS MANUAL.

Drive Charge Filter

Machine Voltage

Bypassed. Service machine to correct.

High. Service machine to correct.

DRIVE CHARGE FILTER BYPASS This message is 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.

MACHINE VOLTAGE HIGH This message will be displayed when machine voltage readings of greater than 30V are detected.

Machine voltage readings indicate voltage levels in the electrical system.

When this alarm is activated investigate the cause immediately.

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Tigercat T726G Trencher

Controls and Operation

Machine Voltage

Hardware Fault – MD3

Low. Service machine to correct.

Active fault has been hidden. Turn key off and on to recall active hidden hardware faults.

MACHINE VOLTAGE LOW This message will be displayed when machine voltage readings of less than 20V are detected.

Machine voltage readings indicate voltage levels in the electrical system.

When this alarm is activated investigate the cause immediately.

HARDWARE FAULT – MD3 This message is displayed when an alert level active hardware fault related to the MD3 Display module has been hidden.

To recall the original active fault, the operator must turn the key off then back on.

High temperature, low and high supply voltage module alert messages are examples of the type of hardware fault that are the original active faults to trigger this message.

Fuel

Hardware Fault – XA2

Level low.

Active fault has been hidden. Turn key off and on to recall active hidden hardware faults.

FUEL LEVEL LOW This message will be displayed when the fuel level falls below 18% of full.

Note that the fuel gauge symbol changes from its normal white to yellow when fuel level is low.

Refer to FUEL TANK in THIS SECTION for tank capacities.

HARDWARE FAULT – XA2 This message is displayed when an alert level active hardware fault related to the XA2-A0 module has been hidden.

To recall the original active fault(s) the operator must turn the key off and on.

High temperature, low and high supply voltage module alert messages are examples of the type of hardware fault that are the original active faults to trigger this message.

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Controls and Operation

Hardware Failure - VIN

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.

HARDWARE FAILURE – VIN This message will be displayed when a voltage input error message has been hidden.

HARDWARE FAILURE – DOUT This message will be displayed when a digital output error message has been hidden.

To recall the original active fault(s) the operator must turn the key off and on.

To recall the original active fault(s) the operator must turn the key off and on.

Hardware Failure - DIN

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.

HARDWARE FAILURE – DIN This message will be displayed when a digital input error message has been hidden.

HARDWARE FAILURE – COUT This message will be displayed when a current output error message has been hidden.

To recall the original active fault(s) the operator must turn the key off and on.

To recall the original active fault(s) the operator must turn the key off and on.

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Tigercat T726G Trencher

Controls and Operation

SPN: 8801 1 of 1

SPN: 62755 1 of 1

Engine voltage low.

Engine coolant temperature high.

ENGINE VOLTAGE LOW This message will be displayed when engine voltage readings of less than 20V are detected.

When this alarm is activated investigate the cause immediately.

ENGINE COOLANT TEMPERATURE HIGH This message will be displayed, alarm warning light will flash and alarm will sound when engine temperature exceeds recommended engine temperature.

Investigate cause as soon as possible.

When this alarm is activated check for:

SPN: 4449 1 of 1

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

Engine voltage high.

• Plugged radiator.

Refer to CLEANING A/C CONDENSER, AND COOLER PACKAGE in THIS SECTION. Refer to COMPUTER – MESSAGES - CRITICAL – ENGINE COOLANT TEMPERATURE HIGH.

ENGINE VOLTAGE HIGH This message will be displayed when engine voltage readings of greater than 30V are detected.

SPN: 17429 1 of 1

When this alarm is activated investigate the cause immediately.

Water in Fuel.

FUEL – WATER IN FUEL This message will be displayed when water is detected in the fuel by the engine computer system.

Refer to engine manufacturer's manual for specific information regarding the engine.

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Tigercat T726G Trencher

Controls and Operation DIESEL EXHAUST FLUID LEVEL MESSAGES There are three levels of diesel exhaust fluid level warnings generated by the Engine ECU.

SPN: 64191 1 of 1 DEF tank empty.

SPN: 61839 1 of 1 DEF Level below 10%.

DIESEL EXHAUST FLUID LEVEL <10% This message will be displayed, alarm light flashes and alarm sounds when a diesel exhaust fluid level below 10% is detected. Action to correct DEF levels should be taken immediately to avoid affecting engine performance and damage to the diesel oxidation catalyst / selective catalytic reduction (DOC/SCR) aftertreatment system components.

Fill DEF tank and restart engine to clear the message.

Refer to DIESEL EXHAUST FLUID (DEF) TANK in THIS SECTION.

DIESEL EXHAUST FLUID LEVEL EMPTY This message will be displayed, alarm light flashes and alarm sounds when diesel exhaust fluid level empty is detected. Action to correct DEF levels should be taken immediately to avoid affecting engine performance and damage to the diesel oxidation catalyst/selective catalytic reduction (DOC/SCR) aftertreatment system components.

• Beginning immediately after a DEF level empty message, the engine is derated to idle within 30 minutes.

Fill DEF tank and restart engine to clear the message.

NOTE: An Engine Torque Derate Active message will also be triggered as the engine begins to derate. Refer to COMPUTER – MESSAGES CRITICAL – ENGINE TORQUE DERATE ACTIVE in THIS SECTION.

SPN: 62095 1 of 1 DEF Level below 5%.

DIESEL EXHAUST FLUID LEVEL <5% This message will be displayed, alarm light flashes and alarm sounds when a diesel exhaust fluid level below 5% is detected. Action to correct DEF levels should be taken immediately to avoid affecting engine performance and damage to the diesel oxidation catalyst /selective catalytic reduction (DOC/SCR) aftertreatment system components.

Beginning immediately after a DEF level <5% message, there will be a ramp down of Engine Speed by 60% and Torque by 65% over 40 minutes.

Fill DEF tank and restart engine to clear the message.

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Tigercat T726G Trencher

Controls and Operation NOTE: An Engine Torque Derate Active message will also be triggered as the engine begins to derate. Refer to COMPUTER – MESSAGES CRITICAL – ENGINE TORQUE DERATE ACTIVE.

SPN: 19402 1 of 2

Refer to DIESEL EXHAUST FLUID TANK in SECTION 2 of THIS MANUAL and DRAINING DIESEL EXHAUST FLUID TANK in SECTION 3 of THIS MANUAL.

DEF quality low.

Refer to AFTERTREATMENT SYSTEM in SECTION 3 of THIS MANUAL for more information regarding the use of DEF and its function in the DOC/SCR aftertreatment system.

SPN: 19658 2 of 2

WARNING

DEF quality low.

DIESEL EXHAUST FLUID QUALITY This message will be displayed, alarm light flashes and alarm sounds when a diesel fluid quality problem is detected. Action to correct the problem should be taken immediately to avoid affecting engine performance and damage to aftertreatment system components.

This message results in the following derate and engine lockout sequence if no action is taken to correct the problem: • Beginning one hour after a DEF quality message there will be a ramp down of Engine Speed by 60% and Torque by 65% over 40 minutes.

• After two hours at derated engine speed and torque, the engine is derated to idle within 30 minutes.

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.

2.77

Use only diesel exhaust fluid (DEF) which meets ISO 22241 specifications. NEVER fill the DEF tank with any other fluid.

DEF fluid 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.

Tigercat T726G Trencher

Controls and Operation

SPN: ###### 1 of 1 Contact dealer.

MODULE HIGH TEMPERATURE – ALERT Module high temperature alert message will be displayed to indicate that the computer control system has detected high temperature readings in a system module.

The module is identified on the display screen.

The temperature reading value is also displayed.

ENGINE FAULT CODE MESSAGES – ALERT Alert engine fault message(s) will be displayed, alarm light flashes and alarm sounds when an alert engine fault message is received from the engine electronic control module.

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. MD3

They provide the SPN code (suspect parameter number) as well as a message describing the fault (when available).

Display

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.

Value: 75° C

High temperature

An example of an alert engine fault message is shown above.

XA2-A0

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.

XA2-A0- Module 1 - Cab High temperature

Refer to ENGINE MANUAL for specific information regarding the engine and aftertreatment system.

Value: 75° C

XA2-A1

XA2-A1- Module 2 - Rear Chassis High temperature

Value: 75° C

2.78

Tigercat T726G Trencher

Controls and Operation

MODULE HIGH SUPPLY VOLTAGE – ALERT Module high supply voltage alert message will be displayed to indicate that the computer control system has detected high supply voltage readings in a system module.

MODULE LOW SUPPLY VOLTAGE – ALERT Module low supply voltage alert message will be displayed to indicate that the computer control system has detected low supply voltage readings in a system module.

The module is identified on the display screen.

The voltage reading value is also displayed.

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.

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. MD3

MD3

Display

Display

Low supply voltage

High supply voltage

Value: 34 V XA2-A0 XA2-A0

XA2-A0- Module 1 - Cab

XA2-A0- Module 1 - Cab

Low supply voltage

High supply voltage

Value: 34 V XA2-A1 XA2-A1

XA2-A1- Module 2 - Rear Chassis

XA2-A1- Module 2 - Rear Chassis

Low supply voltage

High supply voltage

Value: 34 V

2.79

Tigercat T726G Trencher

Controls and Operation SERVICE COMPARTMENTS, DOORS AND ACCESS PANELS

HYDRAULIC OIL HAND PUMP

REAR COMPARTMENT DOOR

DOOR SAFETY STOP IN LOCK OPEN POSITION

LIFT BOOM CYLINDER LOCK

T726G-026

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. Reverse this procedure to close doors.

REAR ACCESS PANELS

3

T726G-033

The rear compartment door provides access to the aftertreatment system components, hydraulic pumps, hydraulic oil return manifold, charge pressure filter, pilot filter, hydraulic oil sight gauge, hydraulic oil hand fill pump (on inside of rear compartment door), lift boom cylinder lock, pump drive gearbox dipstick and the fuel filter/water separator.

1 2

726GT-022

The following access panels are located at the rear of the machine: 1. Hydraulic oil return filters and breather.

2. Hydraulic oil tank clean out and access to oil diffusers.

M726E-104

3. Fuel tank clean out and access to fuel strainer.

ACCESS TO HYDRAULIC RETURN FILTERS

To access all components listed above, remove the three panel(s) mounting screws and remove the panel(s).

ACCESS TO HYDRAULIC TANK DIFFUSERS

T726G-029

To open the door, swing the latch pin stop to the side, lift up the pin and swing open the door.

2.80

Tigercat T726G Trencher

Controls and Operation

RIGHT SIDE COMPARTMENTS, DOORS AND ACCESS PANELS 7

6

4

OPENING THE RIGHT SIDE DOORS AND PANELS

2

7

8

8

9

9

726GT-040

5

3

1

726GT-040

6

5

4

3

2

1

The following compartments, doors and access panels are located on the right side of the machine:

The right side cab door (1) is an emergency exit but also gives access to the AC/heater unit and inside the control panel.

1. Cab door.

The cooling fan and motor upper door (2) is hinged. To open the door, swing the latch pin stop to the side, lift up the pin and swing open the door.

2. Cooling fan and motor access, hinged door.

3. Cooling fan and motor access, removable panel.

4. Engine compartment access, hinged door.

5. Engine compartment access, removable panel.

6. Diesel fuel fill, hinged cover.

7. Fuel level sender, removable panel.

The engine compartment upper door (4) 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 (5) 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.

8. DEF tank fill cap access, hinged door.

9. DEF tank access, removable panel.

726GT-035

11

The cooling fan and motor lower panel (3) 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.

10

The standard fuel fill cover (6) is hinged. To access the fuel fill cap remove the padlock and swing open the cover.

To access the fuel level sender remove the panel (7) mounting screws and remove the panel.

12

726GT-034

10. Pilot manifold access - rear bottom of cab, removable panel.

To access the DEF tank fill cap remove the lynch pin and swing open the hinged door (8).

To access the DEF tank remove the panel (9) mounting screws and remove the panel.

11. Pilot manifold access - inside front of cooling fan compartment, removable panel.

12. Engine access - inside rear of cooling fan compartment, removable panel.

These three panels are mirrored on the left side of the machine. To access pilot manifold and engine remove the panels mounting screws and remove the panels.

2.81

Tigercat T726G Trencher

Controls and Operation LEFT SIDE COMPARTMENTS, DOORS AND ACCESS PANELS 14

726GT-041

16

13

15

OPENING THE LEFT SIDE DOORS AND PANELS

17

14

16

17

19

19

20

20

21

21

18

726GT-041

13

15

18

The following compartments, doors and access panels are located on the left side of the machine:

The left side cab door (13) is the main access to the cab.

13. Cab door.

The cooling package upper door (14) is hinged. To open the door, swing the latch pin stop to the side, lift up the pin and swing open the door.

14. Cooling package access, hinged door.

15. Cooling package access, removable panel.

16. Engine compartment access, hinged door.

17. Engine compartment access, removable panel.

18. Engine compartment access, hinged door.

19. Batteries, coolant heater and pressurized air tank access, hinged door.

20. Battery disconnect switch, main fuse and relay panel and pressurized air tank access,hinged door.

21. Main fuse and relay panel and pressurized air tank access, removable panel.

The cooling package lower panel (15) 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 (16) 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 (17) 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 (18), pull on the latch handle and swing the door open.

To open the batteries, coolant heater and pressurized air tank hinged access door (19), and the battery disconnect switch access door (20), pull on the latch handles and swing the doors open.

To access the main fuse and relay panel and pressurized air tank (21) remove the panel mounting screws and remove the panel.

2.82

Tigercat T726G Trencher

Controls and Operation

FUEL TANK

FUEL LEVEL SENDER

REFUELLING Park machine on level ground, turn OFF the engine and allow the machine to cool.

FUEL FILL CAP

S≤15 mg/kg

DO NOT refuel while smoking or near flames or ULTRA LOW SULFUR sparks.

FUEL ONLY 36686AUNI R0

Clear obstructions from steps and handles needed to access the fuel tank.

FUEL TANK

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

T726G-019

Located at the right rear of the machine, the fuel tank has a capacity of 552 L (146 US gal). The fuel fill cap is located under a hinged cover on the top of the tank. The fuel level sender is located under a bolted on cover on the top of the tank. The fuel level sender sends a signal to the computer system which displays an on screen fuel level gauge.

718E-037

FUEL NOZZLE HOLDING BRACKET 726GT-014

Before climbing onto the machine to refuel, secure the fuel nozzle in the nozzle holding bracket.

DIPSTICK

Once safely on the machine open the cover on top of the fuel tank (if equipped) and clear any debris from around the fuel fill cap.

S≤15 mg/kg

Remove the fuel fill cap slowly to allow pressure to escape from the tank.

ULTRA LOW SULFUR FUEL ONLY 36686AUNI R0

Inspect the fuel fill cap gasket.

Inspect the fuel fill strainer located under the fuel fill cap for debris or damage.

FUEL FILL STRAINER

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.

When refuelling is complete place the fuel nozzle back in the holding bracket.

FUEL TANK DIPSTICK/FUEL FILL STRAINER 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 fuel fill strainer. DO NOT drop the dipstick into the filler tube or it will punch a hole in the bottom of the fuel fill strainer. The fuel fill strainer should be removed and cleaned every 125 hours (reach in and lift it out). Replace the fuel fill strainer if it is damaged.

Install the fuel fill cap hand tight before closing the fuel fill cap cover.

Climb off the machine.

Remove the fuel nozzle and grounding strap (if applicable).

Before restarting the machine, check that no other personnel have moved into the hazardous area and sound the horn.

2.83

Tigercat T726G Trencher

Controls and Operation DIESEL EXHAUST FLUID (DEF) TANK The DEF tank is located in the compartment below the fuel tank in the right rear corner of the machine. The DEF tank fill cap can be accessed through the hinged door on the front of that compartment. The DEF tank fill point is equipped with a filter to prevent contaminants from entering the tank.

41581AUNI R0

DEF tank capacity is 80 L (21 US gal). DO NOT overfill the tank. This 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).

DEF TANK (BLUE FILL CAP)

A DEF level indicator is shown on the main display of the IQAN MD3 controller, below the fuel gauge.

When DEF levels are low, information messages will be shown on the computer display. Note that extremely low DEF levels may result in derating of engine performance to meet emission standard requirements. Action to correct DEF levels should be taken immediately to avoid affecting engine performance. Refer also to COMPUTER – MESSAGES in THIS SECTION. The DEF tank and DEF supply lines are heated when temperatures are low, the system will thaw DEF within 30 minutes of engine start for proper operation of the SCR after treatment system.

Note also that whenever 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. Refer to SELECTIVE CATALYTIC REDUCTION (SCR) SYSTEM in SECTION 3 of THIS MANUAL. Diesel exhaust fluid (DEF) is an aqueous urea solution with 32.5% high purity urea and 67.5% deionized water. Note that DEF may also be referred to as AUS32 or AdBlue and should meet ISO 22241 specifications. Use only DEF meeting this standard.

WARNING Use only diesel exhaust fluid (DEF) which meets ISO 22241 specifications. NEVER fill the DEF tank with any other fluid.

DEF fluid 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.

M726E-070

DEF TANK

DEF is used by the Selective Catalytic Reduction (SCR) aftertreatment system to lower the concentration of nitrogen oxides from the diesel engine exhaust of this vehicle.

It is important to avoid contamination of DEF when filling the tank as this may cause costly damage to the 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 shown on the computer display. Note that DEF quality problems may result in derating of engine performance to meet emission standard requirements. Action to correct DEF quality problems should be taken immediately to avoid affecting engine performance and damage to SCR aftertreatment system components. Refer to COMPUTER – MESSAGES in THIS SECTION. IMPORTANT! DEF should be stored between -11°C (12°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.

Refer to SELECTIVE CATALYTIC REDUCTION (SCR) SYSTEM in SECTION 3 of THIS MANUAL for more information regarding the use of DEF and its function in the SCR aftertreatment system.

2.84

Tigercat T726G Trencher

Controls and Operation

HYDRAULIC OIL TANK

RETURN FILTERS

SIGHT GAUGE – HYDRAULIC OIL LEVEL

HYDRAULIC OIL TANK

SENDING UNIT – LOW HYDRAULIC OIL

T726G-044

SENDING UNIT – OIL TEMPERATURE

Located at the left rear of the machine, the hydraulic oil tank has a useable capacity (to HIGH level mark on gauge) of 187 L (49.5 US gal).

A sight gauge, accessible through the rear door indicates the HIGH and LOW levels of the hydraulic oil. A low level sending unit is installed in the tank that signals the IQAN MD3 controller to display a critical message - 'Hydraulic Oil Level Low' - when the oil level gets too low. Always keep the hydraulic oil between the HIGH and LOW calibrations.

IMPORTANT! A low hydraulic oil level can result in severe damage to pumps.

Over filling causes the excess oil to discharge from the breather vent (not visible).

There is a hydraulic oil temperature sending unit installed in the tank. It sends signals to the IQAN MD3 controller to display the current oil temperature on a gauge on the main display.

2.85

Tigercat T726G Trencher

Controls and Operation HYDRAULIC OIL HAND FILL PUMP

HAND PUMP QUICK CONNECTION

FILL HOSE CONNECTION TO RETURN MANIFOLD

HAND FILL PUMP

FILL HOSE QUICK CONNECTION

HAND PUMP SUCTION TUBE

OIL LEVEL SIGHT GLASS

T726G-062

HYDRAULIC OIL HAND FILL PUMP

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.

• To add oil to the tank, lift the fill hose from storage holder and remove dust cap. Connect it to the quick connection on the hand pump.

• Remove the suction tube from its storage position and remove cap.

• Clean the tube, then insert it into the supply drum. Operate the pump to fill tank.

• The pump should always be operated at a medium speed with steady motion. Pump oil until FULL level is observed on the tank sight glass. Check oil level with cylinders fully retracted to obtain an accurate level reading.

• Remove suction tube from supply drum, wipe it clean, install dust cap and place in stored position.

• Disconnect supply hose, install dust cap on quick connection, and place hose end back in holder.

• Wipe off any oil to prevent dust accumulation.

2.86

Tigercat T726G Trencher

Controls and Operation

HYDRAULIC RETURN FILTERS

RETURN MANIFOLD

RETURN FILTER BY-PASS PRESSURE SWITCH

(4) HYDRAULIC RETURN FILTERS

HYDRAULIC TANK ACCESS COVER TO HYDRAULIC RETURN DIFFUSERS T726G-063

The return oil entering the hydraulic tank passes through four replaceable filters mounted on filter heads above the tank and two mesh type reusable diffusers one on the end of each return tube in the tank.

There is a bypass valve built into each filter head preset at 1.7 bar (25 psi), which will open in the event the elements become restricted. Before this valve is activated, a 1.4 bar (20 psi) filter restriction switch, located on the return manifold, will generate a message on the computer screen.

IMPORTANT! Contaminated hydraulic oil can lead to premature failure of hydraulic components and costly repairs.

Filters must be replaced at the recommended time intervals. Refer to SECTION 3 in THIS MANUAL. Use of hydraulic oil filters other than the Tigercat brand could lead to severe wear and rapid failure of hydraulic system components.

2.87

Tigercat T726G Trencher

Controls and Operation

AIR FILTER RESTRICTION INDICATOR

AIR CLEANER

ELECTRICAL RESTRICTION INDICATOR SWITCH

MECHANICAL AIR FILTER RESTRICTION INDICATOR

UNLOADER VALVE

T726G-087 T726G-053

A filter restriction switch is installed on the outlet side of the air cleaner, the switch is used to signal the IQAN MD3 controller when the filter is restricted.

SAFETY ELEMENT

Engine Air Intake Filter Restricted. Service Machine to correct.

PRIMARY ELEMENT 470-04

AIR FILTER ELEMENTS

The air cleaner on this machine uses two filter elements; a primary element and a safety element.

It is accessible through the right side engine compartment doors.

To ensure maximum engine protection, it is important that the elements be serviced correctly and at proper servicing intervals.

An alert message will appear on the IQAN MD3 controller display to indicate the engine air intake filter is restricted. Replace the primary air filter element if the alert message is displayed. Replace the secondary (safety) filter every third primary filter change to guarantee maximum performance and reliability.

A mechanical filter restriction indicator is also connected to the outlet side of the air filter.

Replace the primary air filter when the indicator shows RED. This indicator provides a continuous reading whether the engine is running or is turned off. After replacing the filter, reset the indicator by pressing the reset button.

NOTE: Replace the safety element every third primary filter change.

2.88

Tigercat T726G Trencher

Controls and Operation

AIR CLEANER UNLOADER VALVE

UNLOADER VALVE

T726G-087

This rubber valve on the tube of the air cleaner housing should be checked before every shift (eight hours). If this valve is missing, damaged or has turned hard, it will cause the air cleaner to become ineffective. The valve should suck closed at ⅓ throttle.

This valve should be replaced every 1000 hours.

Remove the unloader valve from the tube of the air cleaner housing. Check and clean the valve.

A good valve is soft and flexible. If plugged, be sure to check the filter elements as they may need replacing as well. Reattach the valve to the tube.

When operating in high dust conditions, the unloader valve should be checked and squeezed every two hours to release dust buildup.

In addition, refer to the LUBRICATION AND MAINTENANCE SCHEDULE in AIR CLEANER MAINTENANCE in SECTION 3 of THIS MANUAL.

2.89

Tigercat T726G Trencher

Controls and Operation ENGINE AIR PRECLEANER

How it works: 3

3

ENGINE AIR PRECLEANER

4

2

1 5

T726G-054

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. However, it should be checked periodically to make sure that foreign materials have not plugged the intake area or the exhaust port area.

480-017

PRECLEANER OPERATION

1. Dirty air (1) enters the precleaner, which is clamped onto the engine air intake.

2. Specially-designed vanes (2) , curved and angled to precisely direct air flow, move the dirty air toward the stainless steel impeller (3).

3. The dynamically balanced, one piece impeller (3) (only moving part) creates a tornado inside the housing.

4. The centrifugal force of the tornado expels the heavier than air dirt particles (4), chaff, dust, snow, rain, etc., out the discharge louver.

5. Cleaned air (5) enters the engine air cleaner intake pipe, and the filter element has only the very light particles to remove.

Results: • Cleaner Air for The Engine.

• Longer Filter Element Life.

• Increased Engine Life.

• Increased Engine Performance.

• Reduced Operating Costs.

2.90

Tigercat T726G Trencher

Controls and Operation

DRUM WATER SPRAY SYSTEM STRAINER

T726G-064

WATER TANK

The strainer should be checked every 250 hours.

Turn the water supply shut-off valve off.

T726G-064

Unscrew the strainer bowl from the housing and remove the bowl and strainer. Clean the bowl and strainer and reinstall them back on the housing.

The water tank is mounted on top of the rear chassis.

GAUGE

WATER PUMP

RELIEF VALVE

WATER FILL CONNECTION AND SHUT-OFF VALVE

T726G-076

T726G-088

T726G-075

WATER SUPPLY PUMP AND RELIEF VALVE The water supply pump and relief valve are located in the front chassis hydraulic valve compartment. The water pump is on the left side and the relief valve is on the right side.

WATER FILL CONNECTION/SHUT-OFF VALVE The water tank fill connection is located in the rear 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.

The relief valve assembly 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.

WATER SUPPLY SHUT-OFF VALVE

STRAINER T726G-074

WATER SUPPLY SHUT-OFF VALVE AND STRAINER The drum water spray system has a shut-off valve located in the cooler package compartment on the left side of the machine. It is used to turn the water supply ON and OFF. A strainer located just below the shut-off valve is provided to filter out any particles in the water supply.

2.91

Tigercat T726G Trencher

Controls and Operation ATTACHMENT

WATER SPRAY NOZZLES There are six water spray nozzles mounted on the cutter head.

WATER SPRAY TRIGGER SWITCH

NOZZLES 726GT-024

RIGHT HAND JOYSTICK

T726G-089

DRUM WATER SPRAY This is controlled by the trigger switch on the RH joystick. Use this switch to turn ON/OFF the water spray system for the attachment drum. Water is used to control dust during cutting. Pull the trigger switch to cycle/select the water spray between ON (always on) , OFF (always off) or AUTO (on when cutting) . Your selection icons are displayed on the IQAN MD3 controller main display screen.

Two nozzles are on the right and left side plates.

NOZZLES

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).

T726G-090

Two nozzles are on top of the attachment near the manifold.

NOZZLES WATER TANK

FRONT OF MACHINE (DRUM)

SHUT-OFF VALVE STRAINER

SHUT-OFF VALVE FILL CONNECTION

SHUT-OFF VALVE (ELECTRIC) ELECTRIC PUMP

100 psi GAUGE

PRESSURE RELIEF VALVE 726GT-019

WATER SPRAY SYSTEM COMPONENTS 2.92

Tigercat T726G Trencher

Controls and Operation HORN SIDE PLATE SELECTION

726GT-007

The system utilizes quick connect/disconnect fittings to attach/detach to/from the nozzles.

SIDE PLATE SHIFT

RIGHT HAND JOYSTICK

SIDE PLATE SELECTION (OPTIONAL) Push the switch to cycle/select either left, right or both plates. Your selection icons are displayed on the IQAN MD3 controller Main Display 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.

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 (OPTIONAL) 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 to move the side plate(s) to the right. Slide the switch to the left to move the side plate(s) to the left. Release the switch to stop side plate(s) shift.

Before using either of these switches, place the throttle in LOW IDLE.

2.93

Tigercat T726G Trencher

Controls and Operation CLEANING A/C CONDENSER, OIL COOLER, RADIATOR AND CHARGE AIR COOLER (COOLER PACKAGE) 1

2

726GT-041

LEFT SIDE – COOLER PACKAGE ACCESS DOOR AND PANEL 726GT-036

CROSS-FLOW FAN

The cross-flow fan is mounted on the right side of the machine. 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.

The cooler package should be manually checked every eight hours (every shift) or more often where conditions cause accumulation of twigs, leaves, pine needles and dust. All of the engine enclosure doors should also be checked.

PROCEDURE: 1. Turn OFF the engine as per instructions in ENGINE STOPPING in THIS SECTION. Always follow proper engine shutdown procedures. The important benefits are: HYDRAULIC OIL COOLER T726G-037

A/C CONDENSER

RADIATOR

• Extended life of the engine, cooling and exhaust systems.

CHARGE AIR COOLER

COOLER PACKAGE

The cooler package intake surface is located on the left side of the machine and consists of the charge air cooler, radiator, A/C condenser and hydraulic oil cooler.

• Reduced risk of post shutdown fires.

• Interior of machine cools significantly reducing risks from touching hot surfaces.

2. Open both cooler package access doors (1) on both sides of the machine behind the cab, by swinging the latch pin stop to the side, lifting up the pin and swinging the doors open.

3. Lift out the bottom screen panels (2) on both sides of the machine, behind the cab.

2.94

Tigercat T726G Trencher Compressed air or water may be used for cleaning.

CAUTION

Controls and Operation USING THE FAN SWITCH IN THE EVENT OF AN ENGINE COOLING AND/OR HYDRAULIC OIL TEMPERATURE ALARM.

• If using compressed air for cleaning, use at 2.1 bar (30 psi) or less.

FAN SWITCH

• Always use personal protective equipment 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 will impair the reversible fan's ability to remove dust and dirt particles.

Care must be taken when cleaning this assembly, as the components can be damaged by careless handling and cleaning.

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 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, 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 in THIS SECTION for more information.

M726E-044 T726G-055

CONTROL PANEL CONTROL PANEL

In the event of an engine cooling temperature and/ or hydraulic oil temperature alarm: 1. Stop working the machine, keep engine at high idle.

FULL ON AUTO CLEAN 724G-011

2. Press the top of the fan control switch to the FULL ON position until cooling is achieved.

3. If necessary press and release the bottom of the switch to use the CLEAN function to reverse fan flow and clean debris from the cooler package and air intake door screens.

4. In severe operating conditions manual cleaning of debris may be required.

5. If the problem persists check engine coolant and/or hydraulic oil levels. Refer to OPERATING MACHINE – PRE-START CHECKS in THIS SECTION. 6. Place the switch in the AUTO mode and check for proper operation of the fan. In the event of a problem with the automatic control system the fan control switch should be placed in the FULL ON position while the machine is operating until the fan control can be properly repaired.

NOTE: AUTO REVERSE is disabled when fan is set to FULL ON.

2.95

Tigercat T726G Trencher

Controls and Operation AIR COMPRESSOR – AIR SUPPLY

AIR TOOL SUPPLY QUICK CONNECTOR

T726G-065

AIR COMPRESSOR

An air compressor and two air tanks are provided as an air supply for air tools. The air compressor is mounted on the engine. A governor regulates the air supply system pressure in the air tanks to 8.3 bar (120 psi) maximum.

T726G-109

The air tool supply quick connector is located in the front valve compartment.

LOWER TANK

DRAIN VALVE

PRESSURE RELIEF VALVE TANK T726G-113

GOVERNOR

TANK

DRAINING THE AIR SUPPLY With the engine off, drain the air supply at the drain valve daily, to remove moisture from the system.

DRAIN VALVE

726GT-032

AIR TANKS AND GOVERNOR

The air tanks and governor are mounted inside the battery compartment at the rear left of the vehicle.

The compressors 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

2.96

Tigercat T726G Trencher

Controls and Operation

Before operating the machine, follow the PERIODIC MAINTENANCE instructions in SECTION 3 of THIS MANUAL. Refer to the Engine Operator's Manual supplied with this machine.

DIPSTICK

PRE-START CHECKS: 1. Unlock cab doors, engine enclosure doors and hydraulic compartment doors.

2. Make sure the ignition switch and drum switch are in the OFF position.

ENGINE DIPSTICK

T726G-059

6. Check the engine oil level. The level of the oil must be between the ADD and FULL marks on the dipstick.

T726G-060

PARKING BRAKE SWITCH

M726E-044 T726G-055

DIPSTICK

CONTROL PANEL CONTROL PANEL

3. Check the parking brake for proper operation and set the parking brake ON (ENGAGED).

Fuel DEF

PUMP DRIVE GEARBOX DIPSTICK S/N 726T0501 7. Check the pump drive gearbox oil level. The level of the oil must be between the MAX and MIN marks on the dipstick. The dipstick is located near the right rear of the engine and is accessed through the rear compartment door.

T726G-126

DIPSTICK

4. Turn the ignition switch ON to check fuel and DEF levels on the IQAN MD3 controller main display and if required fill with the appropriate fluids.

HYDRAULIC OIL TANK

PUMP DRIVE GEARBOX DIPSTICK S/N 726T0502 TO 726T0600

SIGHT GAUGE – HYDRAULIC OIL LEVEL

Check the pump drive gearbox oil level. The level of the oil must be between the FULL and LOW marks on the dipstick. The dipstick is located near the left rear of the engine and is accessed through the rear compartment door.

T726G-044

HYDRAULIC OIL TANK

5. Visually check the hydraulic oil level sight gauge. The level should be between the ADD and FULL marks on the level gauge.

2.97

Tigercat T726G Trencher

Controls and Operation M726E-130

ENGINE AIR PRECLEANER

CHECK ENGINE COOLANT LEVEL 8. Check the engine coolant level.

T726G-054

11. Check air intake precleaner for foreign material build-up in air intake area or exhaust port area.

WARNING

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

HYDRAULIC OIL COOLER T726G-037

DRAIN PLUG T726G-061

A/C CONDENSER CORE

RADIATOR

CHARGE AIR COOLER

COOLER PACKAGE

12. Clean cooler package. Refer to CLEANING A/C CONDENSER, OIL COOLER, RADIATOR AND CHARGE AIR COOLER in THIS SECTION.

9. Drain water from fuel filter/water separator.

DIPSTICK

UNLOADER VALVE

T726G-087 T726G-058

10. Check transmission oil level (dipstick).

13. Check air cleaner unloader valve.

14. Be sure that all covers, guards and doors are securely fastened.

2.98

Tigercat T726G Trencher STARTING THE ENGINE 1. Ensure that PRE-START CHECKS have been performed and that the area is clear of personnel prior to starting the engine. Refer to OPERATING MACHINE - PRE-START CHECKS in THIS SECTION.

Controls and Operation NOTE: If the engine does not start after three attempts, check the fuel supply system. Absence of blue or white exhaust smoke during cranking indicates no fuel is being delivered.

2. Sound the horn to warn personnel of machine start-up.

3. ENGAGE the parking brake.

NOTE: The engine can not turn over unless the parking brake is ENGAGED. 4. Turn the ignition key switch to the RUN position. The WAIT TO START icon below will appear on the display during the key ON engine pre-heat 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 turns OFF and gauges are displayed.

Allow a cold engine to warm up at LOW IDLE for at least five minutes before applying any load.

Check all engine parameters on the MD3 display often during the warm-up period.

WARNING DO NOT USE ETHER! Using ether to start the engine may cause an explosion and severe injury. Engine is equipped with an electric heater starting aid for cold weather starts.

CAUTION Do not start the engine by shorting across starter terminals. Start engine only from the operator's seat.

IMPORTANT! The engine should not idle longer than nine consecutive hours. 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 will generate excess heat which will cause damage to the emission control system components.

5. Turn the key switch to the START position to crank the engine. When the engine starts, release the key to the RUN position.

NOTE: If the engine does not start after three attempts, check the fuel supply system.

6. Set throttle to LOW IDLE speed and wait three to five minutes before operating with a load.

7. Increase engine speed (rpm) 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 4 and 5.

IMPORTANT! After engine has started, keep engine rpm low until engine oil pressure registers on the computer display. If it does not register within 10 seconds, turn OFF the engine and investigate the cause.

2.99

Tigercat T726G Trencher

Controls and Operation COLD WEATHER STARTING IMPORTANT! Cold start-ups can result in pump failure, refer to APPROVED HYDRAULIC OILS in SECTION 3 for recommended oil viscosity and temperature ranges.

Cold temperatures may require the use of an engine block heater, engine oil pan heater, hydraulic oil heater and fuel heater.

The engine is equipped with an air intake heater with a grid element.

IMPORTANT! To prevent damage to the starter, do not engage starter motor for more than 15 to 20 seconds. Wait two minutes between each attempt to start the engine. If engine fails to start, refer to the engine manufacturer operator's manual.

3. During the engine warm-up period constantly monitor engine coolant temperature and engine oil pressure. Turn OFF the engine if any pressure or temperature does not meet the specification.

NOTE: If at any time during the warming procedure the hydraulic filter bypass icon on the computer display illuminates, return the engine rpm to LOW IDLE .

WARNING Using starting fluid (or ether start aids) on an engine equipped with a grid heater element can cause an explosion. NEVER USE STARTING FLUIDS on an engine equipped with a grid heater element.

4.

Continue with MACHINE PREPARATION procedure when the engine coolant temperature registers NORMAL.

NOTICE

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

Preheating of the hydraulic oil is recommended as standard procedure in cold weather.

1. Follow STARTING THE ENGINE – SEE ENGINE MANUAL instructions for COLD WEATHER STARTING procedure.

• DO NOT IDLE THIS ENGINE FOR MORE THAN 9 HOURS. • DAMAGE TO EMISSION CONTROL SYSTEM WILL RESULT.

63281BENG R0

2. The WAIT TO START icon above will appear on the display during the key ON engine pre-heat 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 turns OFF and gauges are displayed.

IMPORTANT! The engine should not idle longer than 9 consecutive hours. 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 will generate excess heat which will cause damage to the emission control system components.

2.100

Tigercat T726G Trencher

Controls and Operation

RESTARTING AN ENGINE THAT HAS RUN OUT OF FUEL If the engine runs out of fuel perform the following: 1. Refill fuel tank completely.

2. Turn the key switch to the RUN position to turn on the fuel shut-off solenoid.

IMPORTANT! To prevent damage to the starter, do not engage starter motor for more than 15 to 20 seconds.

Wait 2 minutes between each attempt to start the engine. If engine fails to start, refer to engine manufacturer OPERATOR'S MANUAL.

T726G-061

HAND PRIMER

VENT PLUG

WARNING The engine utilizes an air intake heater grid. To avoid personal injury and property damage, NEVER use a starting fluid. Starting aid fluids which contain Ether, can cause an explosion.

FUEL FILTER/WATER SEPARATOR 3. Loosen the vent plug on the fuel filter/water separator head.

4. Use primer pump to refill filter until fuel free of air flows from vent on top of filter head, then tighten vent plug.

5. Turn key switch off and repeat. As well, bleed the system according to the engine OPERATION AND MAINTENANCE MANUAL procedures.

6. Crank engine until it starts. If it fails to start after 20 seconds, stop and wait for two minutes before trying again.

2.101

Tigercat T726G Trencher

Controls and Operation MACHINE PREPARATION

12. Set the parking brake ON.

SYSTEM TEST AND WARM-UP

13. Set engine speed to LOW IDLE position.

Before commencing cutting operations, proceed with steps 1 through 14 to accomplish the following:

WARNING Ensure that the attachment drum has stopped rotating before leaving the cab.

• Warm up the hydraulic system.

14. Leave the cab and visually check hose connections and cylinders for leaks. Check under the machine for oil leaks.

• Test all systems for proper operation.

• Inspect for hydraulic oil leaks.

CAUTION

WARNING

If any system fails to respond to the controls, stop the warm-up procedure and call a mechanic, otherwise serious damage to pumps and other components could result.

Assuming machine was parked on level ground at last shutdown:

Never 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.

1. Start the engine.

2. Ensure computer display is indicating normal operating conditions.

3. Check that all personnel are clear of the machine.

4. Increase engine speed to 1100 rpm.

5. Slowly raise and lower the boom, check for proper operation.

With the attachment raised slightly off the ground: 6. Operate the attachment side shift system and check for proper operation (if applicable).

7. Tilt the attachment forward and back and check that it is operating correctly.

8.

Steer the machine to the left and right.

9. When cold weather conditions exist, continue the process of warming up the hydraulic system by repeating steps 5 through 8 several times. As the hydraulic system warms up, engine speed can be increased gradually to the HIGH IDLE position.

10. Turn the attachment drum ON. 11. After completion of the warm-up and system testing, turn the attachment OFF, stop the drum and rest the attachment on the ground.

2.102

Tigercat T726G Trencher

Controls and Operation

STOPPING THE ENGINE

WARNING

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.

• Before leaving the machine, park it in a safe position on level ground.

• Engage the parking brake, lower the attachment to the ground.

• Never work behind, in front of, or below a machine that has been parked on a grade.

• Take additional precautions by placing the wheels against a rock, tree or other secure object.

1. Park machine on level ground and rest the attachment on the ground.

2. Reduce engine speed to LOW IDLE and let run for approximately three minutes to allow gradual dissipation of heat and also to reduce turbocharger speed. This will also prevent loss of coolant by after boil and possible hot spot damage to the engine.

3. Do not race the engine before turning it off.

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

4. Engage the parking brake.

5. Turn OFF the engine by turning the key switch to the STOP position.

NOTE: Whenever 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 SELECTIVE CATALYTIC REDUCTION (SCR) SYSTEM in SECTION 3 for more information.

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).

2.103

Tigercat T726G Trencher

Controls and Operation CARE OF THE MACHINE

CARE OF POLYCARBONATE WINDOWS IN CAB All 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.

1. Ensure that all fluid levels are always at the proper level. Refer to the LUBRICATION AND MAINTENANCE SCHEDULE in SECTION 3 of THIS MANUAL.

Polycarbonate material is expected to absorb high levels of energy when contacted by high velocity thrown objects such as broken attachment teeth or debris.

2. Lubricate all grease points at the required intervals as specified in the LUBRICATION AND MAINTENANCE SCHEDULE in SECTION 3 of THIS MANUAL. 3. Do not apply load to a cold engine.

4. Close and secure all doors and access covers.

5. Do not allow combustible debris or dust to build up around the radiator intake doors or anywhere else on the machine. Clean frequently.

6. Do not apply load to a cold engine.

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 the ability to resist heavy impacts and therefore compromise effectiveness of operator safety protective equipment. Windows with these defects must be replaced immediately.

7. Follow proper procedure for cleaning windows described in this section.

8. Never park the machine with the attachment raised off the ground. Be sure that the attachment is resting on the ground before servicing or parking the machine. Refer to PARKING THE MACHINE in SECTION 1 of THIS MANUAL for complete instructions.

9. SAFETY FIRST! Follow all safety rules and regulations as outlined in SECTION 1 of THIS MANUAL. 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.

2.104

Tigercat T726G Trencher

Controls and Operation

INSPECTION AND MAINTENANCE Daily inspection and maintenance is essential to confirm that the window’s ability to protect the operator has not been compromised.

RESISTANCE TO CHEMICALS 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.

• Inspect all windows daily and immediately after any impacts.

Other chemicals however can seriously weaken the polycarbonate.

• Check for any damage to the window material or steel structure in the area of the window mounting.

DO NOT permit any of the following chemicals to come into contact with 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.

• acetone • air conditioning refrigerant • ammonia • anti-freeze

• The edges of the polycarbonate window must be free from cracks, chips, notches or scarring and must not be pinched or stressed. These defects will decrease ability to resist heavy impacts.

Windows with these defects must be replaced immediately.

• benzene • brake fluid • carbon tetrachloride • cutting oils • gasoline

• Cracks, chips, notches or scarring anywhere on the viewing surface of the window will decrease ability to resist heavy impacts. Windows with these defects must be replaced immediately.

• lacquer thinner

• Bent, dented or missing window retaining parts must be replaced immediately.

• xylene

• toluene • turpentine

• 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.

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 timetemperature related. This means that the higher the water temperature, the shorter the time before the polycarbonate is adversely affected.

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.

2.105

Tigercat T726G Trencher

Controls and Operation CLEANING INSTRUCTIONS 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.

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: • Fantastik

• DO NOT clean polycarbonate windows when the daytime temperature is high or in direct sunlight.

• DO NOT use abrasive or highly alkaline cleaners on polycarbonate windows.

• DO NOT use glass cleaners in either aerosol or non-aerosol containers to clean polycarbonate windows.

• 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

• Formula 409

• Novus Plastic Polish #1 and #2

• Hexcel F.O. 554 • Joy • Lysol • Mr. Clean • Neleco-Placer • Pine-Sol • Top Job 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 also to RESISTANCE TO CHEMICALS for a list of chemicals which should not be permitted to come into contact with polycarbonate windows.

CAUTIONS • DO NOT use abusive cleaning procedures either by hand or pressure washing on polycarbonate windows.

• Mirror Glaze Plastic Polish Be certain to clean the polycarbonate window as outlined prior to application of an automotive polish. Refer to CLEANING INSTRUCTIONS. GRAFFITI REMOVAL • 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.

• 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 dryer) to soften the adhesive and promote removal.

Refer also to RESISTANCE TO CHEMICALS for a list of chemicals which should not be permitted to come into contact with polycarbonate windows.

FIRE PRECAUTIONS 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.

• DO NOT use brushes, razor blades, scrapers, squeegees or other sharp tools on polycarbonate windows.

2.106

Tigercat T726G Trencher

Controls and Operation

CLEANING INSTRUCTIONS FOR GLASS WINDOWS (BOTH DOORS) Normal window cleaning procedures are acceptable.

WINDOW SCREEN HAND KNOB

173-25

SIDE WINDOW SCREEN

SIDE WINDOW SCREENS The side window screens (if equipped) can be opened to clean the windows. Screens are provided for the personal protection of the operator. A hand knob is provided on both the inside and the outside. By unscrewing either (not both) of these knobs, the screen will be free to swing out on the hinges. Be aware that the screen will swing outwards with considerable force, if the door is open.

720D-024

HINGED SIDE WINDOW SCREENS

All handles should be hand tight only at all times.

2.107

Tigercat T726G Trencher

Controls and Operation TOWING INSTRUCTIONS A machine malfunction may make towing necessary.

Towing is only recommended over short distances. It is always better to make repairs at the point where the machine is parked whenever possible.

IMPORTANT! Before towing, the transmission must always be placed in NEUTRAL. Never tow a machine in gear. The extremely high forces that are created cause significant damage to the components of the hydrostatic drive system and the transmission.

WIDERANGE TRANSMISSION SHOWN IN NEUTRAL

342-3

Raise the attachment off the ground and install the boom cylinder lift lock. Turn OFF the engine.

Never tow the machine at over 3 km/h (2 mph).

Doing so causes significant damage to the transmission.

LIFT BOOM

Never press the forward or reverse pedals while the transmission is in neutral. Doing so causes significant damage to the transmission.

CYLINDER

1. To facilitate towing, the transmission must be placed in NEUTRAL. This disconnects the wheels from the hydraulic motor.

On WideRange transmissions, place a short bar through the hole in the lever and pull upwards to put the transmission into NEUTRAL as shown below.

T–HANDLE

726E-073

LIFT BOOM CYLINDER LOCK IN LOCK POSITION

2. Install the articulation lock bar. See instructions later in this section.

726D-039

FRONT CHASSIS

REAR CHASSIS

RETAINING PIN

342-1

WIDERANGE TRANSMISSION SHOWN ENGAGED

LYNCH PIN

LOCK BAR

LOCK BAR IN LOCKED POSITION

2.108

Tigercat T726G Trencher STEERING CYLINDERS

Controls and Operation STEERING CYLINDERS

C6 P1

P2

P2 C1

C2

PILOT MANIFOLD PILOT

NORMAL HOSE CONNECTIONS

SM47

C4

C5

C6

C7

C8

MANIFOLD

PORTA-POWER PORTA POWER

HOSES CROSS CONNECTED FOR TOWING

718D-046 726E-022

3. To allow the machine to steer while towing and prevent damage to the steering cylinders, cross hydraulic hoses on one of the steering cylinders. This allows trapped oil to flow freely between the two steering cylinders, providing ease of turning with some dampening effect.

4. 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.

C3

PARKING BRAKE PARKING BRAKE

Block the wheels. Remove parking brake supply hose from pilot manifold (C6) and connect to a remote power source. Plug port on pilot manifold. Pressurize circuit to 17 bar (250 psi) to disengage the parking brake.

5. Remove the articulation lock bar.

6. The machine is towed from the rear, making use of the towing lugs underneath the bumper.

Make sure a vehicle of equal power and size is used for towing.

724E-007 724E-008 724E-016

When going downhill use a holdback vehicle, as the machine is now without any effective braking.

PARKING BRAKE ASSEMBLY

SPRINGS DRIVE SHAFT

7. When towing is completed, install the articulation lock bar and reconnect the steering cylinder hoses to their proper locations.

STATIONARY DISCS ROTATING DISCS

HYDRAULIC DEACTIVATED PARKING BRAKE

2.109

Tigercat T726G Trencher

Controls and Operation TRANSPORTING INSTRUCTIONS IMPORTANT! When transporting the machine, chains must be used to prevent forward, reverse and side to side movement of the machine.

The machine may be transported with the wheels on or off. If the wheels are removed the machine must be blocked so that the center joint is one inch or more above the truck bed.

With the wheels on or off: • The attachment must be lowered to the truck bed.

• The articulation lock bar must be installed.

IMPORTANT! Do not secure the machine to the truck anywhere near the center joint area as this can seriously damage the center joint.

Use only transport regulation chains for this purpose. For example, a 5/16" grade 7 with a tensile strength of 43636 kg/chain (96,000 lb/ chain). Using inferior or damaged chains could cause the load to shift.

The chains must be looped around the axles and hooked back onto the links of the chain creating a full loop around the axles. The chains should be attached to the opposite sides of the trailer and evenly tensioned with the load binders.

• The machine must be crossed chained (side to side) over and around both the front and rear axles.

726GT-022

A

B B D

A

D C

A

C D

A

D

A B

B

B

D

C

D

C

D A

A

CHAIN TIE DOWN AND LIFT LOCATION INFORMATION

2.110

Tigercat T726G Trencher

Controls and Operation

ARTICULATION LOCK BAR 1. Position the machine on level ground and steer the machine into a straight ahead position.

2. Lower the attachment to the ground, apply the parking brake, turn OFF the engine and remove the key.

WARNING To prevent movement of the machine and possible injury, install the articulation lock bar before performing any work in the center joint area.

3. Remove both retaining pins from the front and rear chassis.

726D-039

FRONT CHASSIS

REAR CHASSIS

RETAINING PIN

LYNCH PIN

LOCK BAR

LOCK BAR IN LOCKED POSITION 4. Slide the lock bar out of the front chassis and place between the lugs on the rear chassis.

5. Align the holes at each end of the lock bar with the holes in the chassis.

6. Secure in place with both retaining pins.

7. Install the lynch pins.

8. After work is completed, slide the lock bar into the front chassis storage position and hold in place with the retaining pin.

9. Install the lynch pin.

10. Store the second retaining pin in the lugs on the rear chassis.

11. Install the lynch pin.

2.111

Tigercat T726G Trencher

Controls and Operation LIFT BOOM CYLINDER LOCK

LIFT BOOM

Before performing work under the attachment or lift boom, ensure that the attachment is firmly supported on level ground, on solid stands or, install lift boom cylinder lock.

CYLINDER

CYLINDER LOCK

T-HANDLE

726E-073

LIFT BOOM CYLINDER LOCK IN LOCK POSITION

Completely raise the lift boom and place the cylinder lock over one of the two cylinder rods with the open side facing down and the wide end against the cylinder gland. Install the T-handle retaining bolt through the center hole.

CYLINDER LOCK

Do not place yourself under the boom or attachment while doing this. Do not damage the piston rod when installing the boom lift lock. Turn OFF the engine, turn the key switch to the RUN position , press the interlock reset switch to activate the pilot oil system.

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

T726G-026

CYLINDER LOCK STORAGE

The lift boom cylinder lock is stored on the inside of the hydraulic pump compartment door.

INTERLOCK RESET SWITCH

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

• Always install T-handle retainer bolt.

• Use only to support boom and attachment.

M726E-044 T726G-055

CONTROL PANEL CONTROL PANEL

To remove the lift boom cylinder lock, start the engine, press the interlock reset switch and raise the boom completely. Without placing yourself under the boom or attachment, remove the T-handle retainer bolt, remove the boom lift lock and reinstall it on the inside of the service compartment door using the T-handle retainer bolt.

2.112

Tigercat T726G Trencher SECTION 3 – LUBRICATION AND MAINTENANCE CONTENTS - SECTION 3

ISSUE 2.0, SEPTEMBER, 2015

AFTERTREATMENT SYSTEM................................................................................................................ 3.28 APPROVED ANTI-SEIZE PASTES...................................................................................................... 3.37 CATALYTIC CONVERTER................................................................................................................... 3.35 DENOX 2.2 DOSING SYSTEM............................................................................................................ 3.33 DIESEL EXHAUST FLUID (DEF) TANK............................................................................................... 3.31 DEF QUALITY SENSOR................................................................................................................... 3.31 DIESEL OXIDATION CATALYST (DOC)............................................................................................... 3.34 DOSING MODULE (DEF INJECTOR).................................................................................................. 3.35 EXHAUST FLAP................................................................................................................................... 3.34 HEATER VALVE/HEATED DEF SUPPLY LINES.................................................................................. 3.33 HUMIDITY AND TEMPERATURE SENSOR........................................................................................ 3.36 MIXER TUBE........................................................................................................................................3.35 NH3 SENSOR...................................................................................................................................... 3.36 NOX SENSOR...................................................................................................................................... 3.37 SUPPLY MODULE................................................................................................................................ 3.34 TEMPERATURE SENSORS................................................................................................................ 3.36 AIR CLEANER, ENGINE.......................................................................................................................... 3.25 AIR CONDITIONING SYSTEM, CHECKING........................................................................................... 3.40 AIR FILTER ELEMENTS.......................................................................................................................... 3.26 AIR INTAKE SYSTEM, ENGINE AIR CLEANER...................................................................................................................................... 3.25 FILTER ELEMENTS.......................................................................................................................... 3.26 IMPORTANT STEPS TO FOLLOW WHEN CHANGING FILTER ELEMENTS................................. 3.26 IMPROPER SERVICING.................................................................................................................. 3.25 OVER SERVICING........................................................................................................................... 3.25 FILTER RESTRICTION INDICATOR.................................................................................................... 3.25 INTAKE TUBING AND JOINTS............................................................................................................ 3.26 PRECLEANER, ENGINE AIR............................................................................................................... 3.27 UNLOADER VALVE.............................................................................................................................. 3.26 AIR PRECLEANER, ENGINE.................................................................................................................. 3.27 APPROVED ANTI-SEIZE PASTES FOR EXHAUST/AFTERTREATMENT SENSORS.......................... 3.37 APPROVED HYDRAULIC OILS.............................................................................................................. 3.13 BELT, ENGINE SERPENTINE, REPLACING........................................................................................... 3.45 BRAKE, PARKING................................................................................................................................... 3.45 CASE DRAIN STRAINER........................................................................................................................ 3.24 CENTRE JOINT LUBRICATION...................................................................................................................................... 3.44 MAINTENANCE.................................................................................................................................... 3.44 CHECKING THE AIR CONDITIONING SYSTEM.................................................................................... 3.40 CONVERSION CHART, UNITS................................................................................................................ 3.55 DEF (DIESEL EXHAUST FLUID) HANDLING AND STORAGE................................................................................................................ 3.38 TANK.....................................................................................................................................................3.31 DENOX 2.2 SYSTEM............................................................................................................................... 3.28 DIESEL EXHAUST FLUID (DEF) HANDLING AND STORAGE.............................................................. 3.38 DIESEL EXHAUST FLUID (DEF) TANK................................................................................................... 3.31 DIESEL OXIDATION CATALYST (DOC)........................................................................................ 3.28, 3.34 DIFFUSERS, HYDRAULIC OIL RETURN................................................................................................ 3.23 DRAINING THE DIESEL EXHAUST FLUID TANK.................................................................................. 3.32 DRIVE SHAFT SPLINE LUBRICATION, MIDDLE AND REAR................................................................ 3.46 EMERGENCY EXIT................................................................................................................................... 3.6 ENGINE AIR PRECLEANER................................................................................................................... 3.27 HOW IT WORKS.................................................................................................................................. 3.27 ENGINE SERPENTINE BELT, REPLACING............................................................................................ 3.45 3.1 SECTION 3 – LUBRICATION AND MAINTENANCE

Tigercat T726G Trencher

Lubrication and Maintenance

FILTERS DEF SUPPLY MODULE FILTER.......................................................................................................... 3.19 ENGINE OIL............................................................................................................................... 3.16, 3.24 FUEL.....................................................................................................................................................3.16 FUEL FILL STRAINER.......................................................................................................................... 3.39 FUEL TANK STRAINER....................................................................................................................... 3.18 FUEL/WATER SEPARATOR................................................................................................................. 3.16 HYDRAULIC OIL RETURN.................................................................................................................. 3.21 HYDRAULIC OIL RETURN DIFFUSERS............................................................................................. 3.23 HYDROSTATIC CHARGE PUMP PRESSURE FILTERS..................................................................... 3.24 FIRE PREVENTION................................................................................................................................... 3.7 FUEL REFUELLING....................................................................................................................................... 3.39 FUEL TANK..............................................................................................................................................3.39 HYDRAULIC OIL RETURN FILTERS....................................................................................................... 3.21 HYDRAULIC OIL RETURN STRAINERS................................................................................................ 3.23 HYDRAULIC OILS, APPROVED.............................................................................................................. 3.13 NEW MACHINE MAINTENANCE.............................................................................................................. 3.3 FIRST 125 HOUR INSPECTION REPORT............................................................................................ 3.3 INITIAL PRE-DELIVERY INSPECTION.................................................................................................. 3.3 TIGHTENING POINTS........................................................................................................................... 3.3 OIL ANALYSIS KITS................................................................................................................................... 3.4 OIL ANALYSIS PROGRAM........................................................................................................................ 3.4 OIL SAMPLE COLLECTION PROCEDURES............................................................................................ 3.5 OIL SAMPLING PROGRAM....................................................................................................................... 3.5 PARKING BRAKE.................................................................................................................................... 3.45 PRECLEANER, ENGINE AIR.................................................................................................................. 3.27 PRESSURE SETTINGS........................................................................................................................... 3.51 REFUELLING...........................................................................................................................................3.39 REPLACING THE ENGINE SERPENTINE BELT.................................................................................... 3.45 SCHEDULED MAINTENANCE GENERAL...............................................................................................................................................3.6 8 HOURS................................................................................................................................................3.8 48 HOURS..............................................................................................................................................3.8 125 HOURS............................................................................................................................................ 3.9 250 HOURS............................................................................................................................................ 3.9 500 HOURS.......................................................................................................................................... 3.10 1000 HOURS........................................................................................................................................3.10 1500 HOURS........................................................................................................................................ 3.11 2000 HOURS........................................................................................................................................ 3.11 2 YEARS...............................................................................................................................................3.12 SEASONAL...........................................................................................................................................3.12 SELECTIVE CATALYTIC REDUCTION (SCR) SYSTEM......................................................................... 3.28 START-UP PROCEDURE AFTER MAJOR MACHINE MAINTENANCE................................................. 3.41 TORQUE CHART, GENERAL.................................................................................................................. 3.50 TORQUE, FLUID CONNECTIONS...................................................................................... 3.52, 3.53, 3.54 TORQUE SPECIFICATIONS, GENERAL................................................................................................ 3.50 TRANSMISSION, CHECK OIL LEVEL..................................................................................................... 3.44 UNIT CONVERSION CHART................................................................................................................... 3.55 UNLOADER VALVE - AIR CLEANER...................................................................................................... 3.26 WHEELS, INSTALLING.............................................................................................................................. 3.3 WIRE COLOUR CODE CHART............................................................................................................... 3.55 3.2

Tigercat T726G Trencher

Lubrication and Maintenance

PREVENTIVE MAINTENANCE SCHEDULE NEW MACHINE MAINTENANCE

*INITIAL PRE-DELIVERY INSPECTION: PERFORM THE INITIAL PRE-DELIVERY INSPECTION USING Tigercat FORM NUMBERS 5340 AND 5347; PDI AND 125 HOUR INSPECTION REPORT

*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 THIS MUST BE COMPLETED WITHIN THE FIRST 125 HOUR TIME FRAME.

*IMPORTANT! TO QUALIFY FOR CONTINUED WARRANTY, THIS REPORT MUST BE COMPLETED AND RETURNED TO Tigercat Industries Inc. WARRANTY DEPARTMENT. Tightening points for first 125 hour inspection report: All hydraulic connections

IMPORTANT! Wheels: When installing wheels, ensure that all paint has been removed from the mating surfaces of both the wheel disc and the flange of the axle to ensure metal to metal contact.

Axles mounting bolts Cab securing bolts Centre joint pin securing bolts

For additional instructions also refer to SECTION 8 of the SERVICE MANUAL.

Engine mounting bolts Hose clamps

Engine hours – maintenance: Check the engine hours in the Engine Menu on the IQAN MD3 controller on a regular basis to determine your scheduled maintenance times.

Pin retainers Pump drive gearbox securing bolts Transmission securing bolts Wheel retaining bolts

The intervals and times on the scheduled maintenance chart in this manual are for normal operating conditions.

Any other loose nut, bolt or fitting

If your machine is being operated in difficult or severe conditions, you should service your machine at shorter intervals.

NOTE: Using filters other than genuine Tigercat replacement filters is not recommended.

Refer to the engine OPERATION AND MAINTENANCE MANUAL for additional required maintenance at this scheduled time period.

3.3

Tigercat T726G Trencher

Lubrication and Maintenance

TIGERCAT OIL ANALYSIS PROGRAM Using the Tigercat Advanced Oil Analysis Program on a regular basis is an excellent preventative maintenance tool.

Studies have shown that it is possible to receive a 10 to 1 payback when looking at the amount saved on repair costs to the amount invested in a scheduled oil analysis program. Some of the benefits of a sampling program include: • Detect problems early before they become major catastrophic failures.

• Better ability to schedule downtime and forecast cost of repairs.

• Monitor maintenance schedules and practices and confirm that the required maintenance is being done on time.

• Increase used equipment value by providing proof of proper maintenance.

This program uses the most modern technology available to analyze all oil 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. This report is available as a mailed or faxed hard copy, sent via e-mail or can be viewed on the internet.

This program will provide Tigercat machine owners access to an Advanced Oil Analysis Program for all major machine components including Engines, Hydraulic Circuits, Axles, Final Drives, Gearboxes, etc.

700 Series

Location

First Sample

Follow-up Samples

Hydraulic Oil

125 hours

Every 1000 hours or 6 months

Transmission

125 hours

Every Oil Change (500 hours or 3 months)

Pump Drive Gearbox

125 hours

Every Oil Change (500 hours or 3 months)

Front & Rear Axles

125 hours

Every Oil Change (1000 hours)

Tigercat Oil 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 followup oil samples.

Refer to OIL SAMPLE COLLECTION PROCEDURES in THIS SECTION. TIGERCAT OIL ANALYSIS KITS Each kit includes a pre-paid sample bottle and a sample information form. Pre-printed 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.

The same type of sample bottle can be used for all types of oil 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 properly collect, prepare and ship the oil samples.

Contact your Tigercat Dealer Parts Department to order Kits.

3.4

Tigercat T726G Trencher

Lubrication and Maintenance

TIGERCAT OIL SAMPLING PROGRAM OIL SAMPLE COLLECTION PROCEDURES Fill out the Sample Information Form (SIF) completely and accurately. When taking multiple oil samples, fill out all of the required SIF forms in their entirety, prior to taking any oil samples. Then, immediately package each completed SIF form together with the matching oil 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 forms and oil samples. Incorrectly identified samples could result in a false warning alarm.

OIL SAMPLING CONNECTOR

The accuracy of the lab analysis results is very dependent on the quality of the oil sample taken. Collection of clean oil samples that are representative of the main body of oil are essential if meaningful lab results are to be obtained.

T726G-044

HYDRAULIC OIL FILTERS AND MANIFOLD ASSEMBLY

Hydraulic Oil Samples: • Whenever possible, hydraulic oil samples should be taken from the circulating oil flow at operating temperature, with no functions actuated, using the gauge test fitting on the return filter manifold and a quick coupler with a drain hose.

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 follow-up samples should be consistently taken from the same location using the same techniques as all previous samples.

• To obtain an oil sample that is representative of the oil in the machine, the sample valve must be purged before the actual oil sample is taken. Drain a minimum of 3 or 4 ounces of oil into a separate container and discard this oil using approved recycling methods.

• Ensure that all sample valves and drain plugs are clean and free of debris.

• Remove the sample bottle cap only when ready to take the sample. Keep the cap clean – do not put it in your pocket or let it get contaminated in any way.

• Replace the dust cover on the sample valve immediately after taking the oil sample and sealing the sample bottle.

• Do not allow any airborne dirt, etc. to enter the sample bottle.

Transmission, Axles and Pump Drive Gearbox Samples:

• Avoid contamination of the sample – replace the sample bottle cap immediately after filling the bottle to approximately ¾ full.

• These samples can be taken during the oil change process.

• To obtain a representative oil sample, ensure the oil is warm and has not settled very long (within 30 minutes of shutdown).

All samples taken should be immediately forwarded to the lab for processing.

Contact your Tigercat dealer to purchase additional or replacement hydraulic sample valves or drain plugs.

• Place the required drain container under the machine to capture the used oil to be discarded using approved recycling methods.

In cases where oil samples must be pumped or otherwise drawn out of a hydraulic tank or housing, a hand operated oil suction pump is also available from your Tigercat dealer.

• 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.

3.5

Tigercat T726G Trencher

Lubrication and Maintenance

GENERAL • 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. Should any exhaust leaks occur during operation, turn OFF the engine immediately and do not put the machine back to work until the necessary repairs have been completed.

CAUTION All handles, steps and platforms must be kept free of grease, oil, fuel, mud, snow, ice, and any other debris.

• Clean around fill caps before checking or adding fluids.

• Release hydraulic pressures and clean around hydraulic fittings before breaking connection.

Plug or cap immediately.

• Always have a fire extinguisher at hand.

• For safety, always lower the boom assembly to the ground when leaving the cab, leaving the machine unattended or during service.

• Clean up all spills immediately.

• Always use clean oil and containers.

• Drain dirty oil while still warm.

• Always install door safety struts when working on the machine.

• Do not exceed recommended fluid levels.

• Clean fire detection system sensors.

• Service all hydraulic strainers and filters after the failure of a pump, motor, cylinder or valve.

Failures of this nature could contaminate the entire hydraulic system.

• For safety, before working under the boom, always lower it to the ground, support it properly or install the lift boom cylinder locking device. Refer to LIFT BOOM CYLINDER LOCK in SECTION 1 of THIS MANUAL.

• Top up diesel fuel at each shift to reduce contamination by condensation.

• Before welding on the machine, be sure to follow all servicing safety precautions as outlined in PRIOR TO WELDING in SECTION 1 of THIS MANUAL.

CHECK EMERGENCY EXIT: An alternate exit is provided: the right side cab door. This exit is to be used only if the left side cab door cannot be opened.

• When welding, secure ground connection as close to working position as possible to prevent arcing across machined surfaces or through bearings.

It is therefore essential that these doors be checked before operating the machine to ensure they are fully operational.

• Clean away all accumulated debris.

Clean up all traces of oil to avoid fires.

Refer to CAB EXITS in SECTION 1 of THIS MANUAL for checking procedure.

• 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.

Should any exhaust leaks or defective parts be found, repairs must be made immediately.

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

OIL LOST FROM LEAKAGE

PER LEAKAGE RATE DAY ONE DROP IN 10 SECONDS 0.424 ONE DROP IN 5 SECONDS 0.852 ONE DROP PER SECOND 4.26 THREE DROP PER SECOND 14.2 DROPS BREAK INTO STREAM 90.83

LOST OIL (LITERS) LOST OIL (GALLONS) PER PER PER PER PER MONTH YEAR DAY MONTH YEAR 12.72 152.0 0.112 3.36 40.0 25.6 306.6 0.225 6.75 81.0 127.76 1533.1 1.125 33.75 405.0 425.86 5110.31 3.75 112.5 1350.0 2725.5 32706.0 24.00 720.0 8640.0

3.6

Tigercat T726G Trencher

Lubrication and Maintenance

CHECK FIRE EXTINGUISHER, DAILY

FIRE PREVENTION Maintaining your machine properly will greatly extend its life and reduce your operating costs.

CHECK CHARGE GAUGE DAILY

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 could have re-positioned itself onto the engine and exhaust parts due to wind turbulence caused by the journey.

1. Debris when allowed to accumulate, form a fuel source that when ignited is extremely difficult to extinguish. 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 the fire.

T726G-010

A portable fire extinguisher is located in the left front of 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 region, the extinguisher should be serviced immediately.

2. Pay close attention to wiring and plumbing routings during maintenance, ensure that ALL wiring harnesses or hydraulic hoses are properly restrained and clamped to prevent damage from chaffing.

Maintain a CHARGED fire extinguisher on the machine at all times and KNOW HOW TO USE IT.

3. If equipped, read the fire suppression system manual and have the system serviced regularly by qualified personnel.

Refer to the manufacturer's Use and Information manual for proper usage, additional information and recommended inspection and maintenance intervals.

4. In case of a fire lower the boom system to the ground and turn OFF the engine before discharging the fire suppression system (if applicable).

Refer to FIRE PREVENTION in SECTION 1 of THIS MANUAL for additional information.

3.7

Tigercat T726G Trencher

Lubrication and Maintenance

SCHEDULED MAINTENANCE • Charge air cooler for damage, wear, cracks, or leaks and repair immediately.

WARNING

• For leakage around hydraulic components and flexible hoses.

• For loose nuts, bolts and fittings.

• Exhaust system for leaks.

• Condition and tension of accessory drive belt.

Hot fluids and hot machine surfaces can cause serious burns!

• Conduct an overall visual inspection.

• Refer to the engine OPERATION AND MAINTENANCE MANUAL for additional required maintenance at this scheduled time period.

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

Clean: • Potentially damaging debris from machine.

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

• Air conditioner condenser, charge air cooler, oil cooler and radiator if required.

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

• Air intake precleaner compartment.

Lubricate: • Lubricate mid drive shaft slip joint, 1 fitting, purge

EVERY 8 HOURS (EVERY SHIFT: • Drain water from fuel/water separator.

NOTE: Lubricate mid drive shaft slip joint with machine articulated.

Check: • Engine coolant level.

• Centre joint bearings, 2 fittings, purge.

• Engine oil level with dipstick.

• Steering cylinder ends, 4 fittings, purge.

• Air intake precleaner, clean as required

• Tilt and lift cylinder ends, 8 fittings, purge.

• Air cleaner unloader valve.

• Quick attach locking pins (if applicable), 2 fittings, purge.

• Air Intake primary and safety filter elements.

• Air intake filter restriction indicator.

• Lift boom and tilt linkage, 10 fittings, (depending on attachment), purge.

• Replace primary filter if indicator is in red zone.

• Centre joint, 2 fittings, purge.

Replace secondary (safety) filter every third primary filter change to guarantee maximum performance and reliability.

EVERY 48 HOURS: Check: • Centre joint for looseness. Refer to CENTRE JOINT – MAINTENANCE in THIS SECTION for instructions. If a problem is found corrective action should be taken immediately.

Refer also to CENTRE JOINT in SECTION 11 of the SERVICE MANUAL for more detailed checking and adjustment procedures.

• Hydraulic oil level.

• Pump drive gearbox oil level with dipstick.

• Transmission oil level with dipstick.

• 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.

3.8

Tigercat T726G Trencher

Lubrication and Maintenance

SCHEDULED MAINTENANCE EVERY 125 HOURS: • Perform 8 HOUR maintenance And in addition: • Lubricate rear axle pivot, 2 fittings, purge.

• Lubricate front drive shaft slip joint,1 fitting, purge.

• Lubricate rear drive shaft slip joint,1 fitting, purge.

Check: • AC/Heater filters.

• Fluid level in batteries unless maintenance free.

• Engine rpm.

• Hydraulic oil restriction indicator for boom/ attachment circuit with engine at FULL rpm.

• Hydraulic pump and motor securing bolts.

• Fuel fill strainer.

• Torque tightening points as per new machine maintenance.

EVERY 250 HOURS: • Perform 8 HOUR maintenance • Perform 125 HOUR maintenance And in addition replace: • Engine oil filter *.

• Oil in pump drive gearbox.

NOTE: Refer to SECTION 8 of the SERVICE MANUAL for oil change procedure.

• Oil in transmission.

NOTE: Refer to SECTION 8 of the SERVICE MANUAL for oil change procedure.

• Oil in attachment drum drive gearbox.

Check: • Parking brake oil level.

• Water system strainer.

• Refer to the engine OPERATION AND MAINTENANCE MANUAL for additional required maintenance at this scheduled time period.

Visually check for damage to: • Lift boom and tilt linkage.

• Front and rear frame.

• Centre joint area.

• Attachment.

Make repairs immediately.

Visually inspect for: • Frayed electrical wiring and hydraulic hose • Wear in any other components.

Clean/replace: • Air conditioner re-circulation filter.

• Cab fresh air filter.

• Refer to the engine OPERATION AND MAINTENANCE MANUAL for additional required maintenance at this scheduled time period.

* Use of filters other than genuine Tigercat replacement filters is not recommended.

3.9

Lubrication and Maintenance

Tigercat T726G Trencher

SCHEDULED MAINTENANCE EVERY 500 HOURS:

EVERY 1000 HOURS:

• Perform 8 HOUR maintenance

• Perform 8 HOUR maintenance

• Perform 125 HOUR maintenance

• Perform 125 HOUR maintenance

• Perform 250 HOUR maintenance

• Perform 250 HOUR maintenance

And in addition: • Lubricate door hinges.

And in addition replace: • Hydraulic oil filter – drive pump charge pressure *.

• Hydraulic oil filter – attachment pump charge pressure *.

• Hydraulic oil return filters *.

• Engine fuel filter/water separator.

• Engine fuel filter.

Check: • All hydraulic pressures.

• Transmission mounting. Check, re-torque.

• Refer to the engine OPERATION AND MAINTENANCE MANUAL for additional required maintenance at this scheduled time period.

• Perform 500 HOUR maintenance And in addition: • Lubricate front and rear axle pinion grease seal, 1 fitting per axle, purge.

And in addition replace : • Engine air cleaner unloader valve.

• Accumulator charge valve strainer • Oil in axles, front and rear.

NOTE: Refer to SECTION 8 of the SERVICE MANUAL for oil change procedure.

Check: • In-tank fuel strainer.

• Centre joint for looseness. Refer to CENTRE JOINT – MAINTENANCE in THIS SECTION for instructions. If a problem is found corrective action should be taken immediately.

Refer also to CENTRE JOINT in SECTION 11 of the SERVICE MANUAL for more detailed checking and adjustment procedures.

• Refer to the engine OPERATION AND MAINTENANCE MANUAL for additional required maintenance at this scheduled time period.

* Use of filters other than genuine Tigercat replacement filters is not recommended.

3.10

Tigercat T726G Trencher

Lubrication and Maintenance

SCHEDULED MAINTENANCE EVERY 1500 HOURS:

EVERY 2000 HOURS:

• Perform 8 HOUR maintenance

• Perform 8 HOUR maintenance

• Perform 125 HOUR maintenance

• Perform 125 HOUR maintenance

• Perform 250 HOUR maintenance

• Perform 250 HOUR maintenance

• Perform 500 HOUR maintenance

• Perform 500 HOUR maintenance

• Perform 1000 HOUR maintenance

• Perform 1000 HOUR maintenance

And in addition replace: • Engine crankcase ventilation filter.

• Refer to the engine OPERATION AND MAINTENANCE MANUAL for additional required maintenance at this scheduled time period.

And in addition replace: • Oil in hydraulic tank.

• Hydraulic tank breather.

• Oil in hydraulic parking brake.

• Replace all air intake rubber components such as elbows and connectors - 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.

• Check ALL air intake tubing, rubber couplings and band clamps for signs of wear and leakage and repair immediately.

• Refer to the engine OPERATION AND MAINTENANCE MANUAL for additional required maintenance at this scheduled time period.

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 diffusers, 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.

NOTE: Check all hydraulic system components especially cooling fan for proper operation after hydraulic oil has been replaced.

* Use of filters other than genuine Tigercat replacement filters is not recommended.

3.11

Lubrication and Maintenance

Tigercat T726G Trencher

SCHEDULED MAINTENANCE EVERY 2 YEARS: • Replace engine coolant.

• Replace DEF supply module filter.

Refer to the engine OPERATION AND MAINTENANCE MANUAL for additional required maintenance at this scheduled time period.

SEASONAL: • Drain and refill hydraulic oil tank with recommended hydraulic oil if required to meet operating temperature range. Refer to APPROVED HYDRAULIC OILS in THIS SECTION.

* Use of filters other than genuine Tigercat replacement filters is not recommended.

3.12

Tigercat T726G Trencher

Lubrication and Maintenance

APPROVED HYDRAULIC OILS Use one of the following oils to fill or replenish the hydraulic system.

Recommended Lubricants - Grease Esso Beacon EP - 2

Shell Alvania EP - 2

Mobil Mobilux EP - 2

3.13

BP EPEnegrease EP - 2

Petro Canada Supreme EP - 2

Tigercat T726G Trencher

Lubrication and Maintenance

3.14

Tigercat T726G Trencher

Lubrication and Maintenance Tigercat Model T726G SERVICE AND LUBRICATION POINTS

REFER TO Tigercat OPERATOR'S MANUAL FOR FURTHER INFORMATION

CHK

14

•

•

4

FUEL FILTER (ENGINE)

5

FUEL/WATER SEPARATOR

6

DEF SUPPLY MODULE FILTER

7

FUELFILL STRAINER

8

IN TANK FUEL STRAINER

9

AIR INTAKE PRECLEANER

10

AIR INTAKE PRIMARY FILTER ELEMENT

11

AIR INTAKE SAFETY FILTER ELEMENT

CHK

12

AIR CLEANER UNLOADER VALVE

CHK

13

AIR INTAKE CONNECTIONS

CHK

DESCRIPTION QTY

2000 

1500 

1000 

500 

•

53

REP •

CRANKCASE VENTILATION FILTER

15

REP

•

3

14

250 

8 ENGINE OIL AND FILTER

CHANGE COOLANT EVERY 2 YEARS

CHK

USG

2

COOLING SYSTEM

CAPACITY LITERS

1

125 

SERVICE POINTNO.

SERVICE EVERY ITEM

60% ANTIFREEZE/40% DISTILLED WATER

1

REP •

1

REP

1

CHANGE FILTER EVERY 2 YEARS

1

REFER TO SECTION 3 OF THIS MANUAL FOR DETAILS.

1

CLEAN OR REPLACE AS NECESSARY

1

DRAIN TANK, CLEAN OR REPLACE AS NECESSARY

CHK

1

CLEAN AS REQUIRED / INSPECT IMPELLER FOR WEAR OR DAMAGE REPLACE AS NECESSARY

CHK

1

DRN CHK

CHK

REP REP REP †

HYDRAULIC OIL RETURN FILTERS

D/R ††

CHK

187

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

49

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

20

A/C & HEATER FILTERS

REP †

2

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

REP

CHK

FRONT DRIVE SHAFT 25

MID DRIVE SHAFT

1

PURGE

LUB PURGE LUB

CENTER JOINT

LUB

CENTER JOINT BEARING PRELOAD

CHK 48 

CLEAN OR REPLACE AS NECESSARY 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

ONE FITTING PER AXLE LITHIUM BASE EP2 GREASE

1

LUB ***

REAR DRIVE SHAFT 26

• SEE ENGINE MANUFACTURER'S OPERATION AND MAINTENANCE MANUAL FOR PROCEDURES AND CAPACITIES

1

LITHIUM BASE EP2 GREASE 

1 PURGE

2

CHK

27

PARKING BRAKE

CHK

28

CUTTER DRIVE GEARBOX

D/R

29

ACCUMULATOR CHARGE VALVE STRAINER

30

WATER SYSTEM STRAINER

D/R

REP CHK

0.5

0.13

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

13

3.4

CHECK LEVEL, SEE DRUM DRIVE OPERATING INSTRUCTIONS, FILL WITH 80W - 140 SYNTHETIC OIL ONLY 1 1

3.15

LITHIUM BASE EP2 GREASE  REFER TO SECTION 3 OF THE MANUAL FOR DETAILS.

SHUT OFF WATER SUPPLY

Tigercat T726G Trencher

Lubrication and Maintenance FILTERS - REMOVE AND REPLACE IMPORTANT! Failure to service and replace filters at the proper intervals specified in the manufacturer's manuals, could cause damage to the machine and result in the product warranty becoming NULL and VOID. Check Tigercat parts catalog for replacement filters.

Refer to the engine OPERATION AND MAINTENANCE MANUAL for correct procedures and time intervals when servicing the engine oil and fuel filters. Read and understand the SAFETY section in each of these manuals.

T726G-0118

ENGINE OIL FILTER

ENGINE COMPARTMENT, LEFT SIDE T726G-127

FUEL FILTER AND FUEL FILTER/WATER SEPARATOR The fuel filter is supplied with the engine. Refer to the engine OPERATION AND MAINTENANCE MANUAL for service information and replacement interval.

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 non-functional. For service and replacement intervals see SERVICE AND LUBRICATION POINTS in THIS SECTION. If the fuel supply is dirty, the fuel filter must be replaced more frequently than recommended in the owner’s manual. Operating the machine with a clogged fuel filter will result in low engine power. It is also recommended that the fuel/water separator bowl be drained daily.

When installing a new fuel filter, DO NOT pre-fill with diesel fuel, or engine fuel pump damage will result. This type of failure is not warrantable by the engine manufacturer.

Unfiltered fuel used to pre-fill filters enters directly into the fuel system. Contaminants in unfiltered fuel can cause significant and costly damage to the engine. The cleanliness of fuel cannot be guaranteed unless it is always pre-filtered before use.

IMPORTANT! Filters that are an integral part of the engine (fuel and lubricating oil) should be serviced and replaced according to the engine OPERATION AND MAINTENANCE MANUAL.

FUEL FILTER

ENGINE COMPARTMENT, RIGHT SIDE

To prolong the operating life of the fuel filter, ensure that the fuel supply storage tank is clean and free of water and that the fuel is pre-filtered prior to adding it to the machine.

RETURN FILTERS DRIVE PUMP CHARGE FILTER FUEL FILTER/ WATER SEPARATOR ATTACHMENT CHARGE FILTER T726G-0114

REAR COMPARTMENT 3.16

Tigercat T726G Trencher CHANGING THE FUEL FILTER/ WATER SEPARATOR: 1. Park the machine on level ground with the attachment resting on the ground.

2. Apply the parking brake.

Lubrication and Maintenance IMPORTANT! Filters that are an integral part of the engine (fuel and lubricating oil) should be serviced and replaced according to the engine OPERATION AND MAINTENANCE MANUAL. 726E-004

3. Turn OFF the engine.

4. Remove the ignition key.

PRIMER PUMP

5. Turn OFF the battery disconnect switch.

6. Clean the area around the filter and head.

VENT PLUG

FUEL FILTER/WATER SEPARATOR

7. Attach a hose to the spout on the bowl drain valve, or place a suitable drain pan underneath it.

8. Loosen the vent plug on the filter head.

Remove the drain on the bowl. Drain the fuel.

9. Disconnect the fuel heater and water-in-fuel sensor from the wiring harness.

10. Remove the water separator filter and bowl from the filter head.

DRAIN PLUG

11. Remove and discard the gasket from the filter head.

WATER-IN-FUEL SENSOR

FUEL FILTER/WATER SEPARATOR

12. Remove the bowl from the bottom of the old filter. Discard this gasket also. Dispose of the old filter and any drained fuel properly.

726E-055

PRIMER PUMP

13. Clean the bowl, seating area for the gaskets on the filter head, and bowl drain.

GASKET

14. Lubricate the gasket for the bottom of the new filter with clean engine oil. Carefully handtighten the water sediment bowl onto the new filter. Clean and replace the drain plug.

FUEL/WATER SEPARATOR

GASKET

15. Lubricate the gasket on top of the new filter with clean engine oil.

WATER/ SEDIMENT BOWL

16. Screw the new filter onto the filter head until the gasket makes contact with the seat. Handtighten an additional 3/4 turn only.

BOWL DRAIN

17. Reconnect the fuel heater and water-in-fuel sensor to the wiring harness.

FUEL FILTER/WATER SEPARATOR

18. Turn ON the battery disconnect switch.

19. Insert and turn the ignition key to the RUN position to energize the fuel supply shut-off solenoid valve.

WARNING Drain the fuel filter into a container and dispose of waste fluids according to local regulations.

20. Use the primer pump to refill the filter until fuel (free of air) flows from the vent on top of the filter head. Tighten the vent plug.

21. Turn ON the engine and check for leaks.

22. Clean up any spilled fuel before returning the machine to operation.

3.17

Tigercat T726G Trencher

Lubrication and Maintenance FUEL TANK STRAINER This is a stainless steel fuel strainer, screwed on to the inlet pipe of the engine fuel feed line inside at the bottom of the fuel tank.

Changing or cleaning the strainer: NOTE: This should only be required if excessive quantities of foreign material has built up inside the tank.

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

CLEANOUT COVER

2. Apply the parking brake.

3. Turn OFF the engine.

4. Remove the ignition key.

5. Turn OFF the battery disconnect switch.

STRAINER

6. Drain the fuel tank (plug in bottom).

7. Remove the round fuel tank cleanout cover plate and O-ring from the access hole.

8. Before removing the strainer, clean any debris from the bottom of the tank and wipe it clean.

726GT-031

9. Remove the fuel strainer using the hex on the end of strainer. Carefully clean the strainer (it may be damaged by rough handling).

10. Check for a build-up of foreign materials where the strainer threads onto the pipe and elbow.

11. Reinstall the strainer using the hex on the end.

12. Reinstall fuel tank cover plate with O-ring.

13. Refuel and check for leaks.

14. Turn ON the battery disconnect switch.

15. Turn ON the engine and check for leaks again.

3.18

FUEL TANK STRAINER

Tigercat T726G Trencher

Lubrication and Maintenance

DEF SUPPLY MODULE FILTER The DEF supply module is located in the right rear compartment mounted on the fuel tank. The DEF supply module filter should be replaced as part of scheduled maintenance every two years.

Changing filter: 1. Park the machine on level ground with the attachment resting on the ground.

2. Apply the parking brake.

3. Turn OFF the engine.

630E-285

10. Find the filter removal tool provided with the replacement parts and select the correct edge BLACK (B) for black filters or (G) GREY for grey filters.

4. Remove the ignition key.

5. Turn OFF the battery disconnect switch.

6. Wipe clean the area around the filter and supply module.

7. Place rags below to catch the spills.

630E-284

11. Insert the tool edge completely until a click is felt or heard.

630E-281

8. Turn the filter cover counterclockwise to remove from the supply module. Use a 27 mm (11/16 in) wrench.

630E-286

12. Pull out the filter, using a tool in the slot on the filter removal tool if required.

630E-282

9. Remove the equalizing element and note the colour of the filter inside (black or grey).

3.19

Tigercat T726G Trencher

Lubrication and Maintenance

630E-290 630E-287

13. Clean surfaces with water only to avoid DEF contamination.

Check the area around the filter for cracks. If cracks are found the supply module must be replaced.

16. Install the new filter cover, tighten to 20 Nm (15 lbf-ft). Use a 27 mm (11/16 in) wrench.

NOTE: The filter cover must be replaced with each filter change.

17. Turn ON the engine and check for leaks.

IMPORTANT! It is important to avoid contamination of DEF when performing maintenance on the system as this may cause costly damage to the 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. NEVER fill the DEF tank with any other fluid.

630E-288

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

14. Install the new filter. Lubricate the O-rings on the filter with clean DEF solution for easy installation.

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

630E-289

15. Install the new equalizing element.

NOTE: The equalizing element must be replaced with each filter change.

3.20

Tigercat T726G Trencher

Lubrication and Maintenance

HYDRAULIC OIL RETURN FILTERS RETURN MANIFOLD

Return Oil Filters Bypassed. Slowly warm up machine or service if already warm.

RETURN FILTER BY-PASS PRESSURE SWITCH

OIL SPILL CATCH TRAY

HYDRAULIC FILTER SERVICING GUIDELINES

(4) HYDRAULIC RETURN FILTERS

IMPORTANT! NEVER PRE-FILL HYDRAULIC FILTERS

OIL SPILL DRAIN VALVE

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 valves, pumps and motors. The cleanliness of hydraulic oil cannot be guaranteed unless it is always pre-filtered before use.

HYDRAULIC TANK

T726G-063

ACCESS COVER TO HYDRAULIC RETURN DIFFUSERS

The return oil entering the hydraulic tank passes through four replaceable filters mounted on filter heads above the hydraulic tank at the left rear of the machine and two mesh type reusable diffusers one on the end of each return tube in the hydraulic tank.

There is a bypass valve built into each filter head preset at 1.7 bar (25 psi), which will open in the event the elements become restricted. Before this valve is activated, a 1.4 bar (20 psi) filter restriction switch, located on the return manifold, will generate a critical message on the IQAN MD3 controller.

NOTE: The hydraulic oil filter bypass icon will also be illuminated in yellow when the hydraulic oil temperature is low and red when hydraulic oil is at operating temperature.

Contaminated hydraulic oil can lead to premature failure of hydraulic components and costly repairs. Filters must be replaced at the recommended time intervals, refer to SCHEDULED MAINTENANCE in THIS SECTION. Use of hydraulic oil filters other than the Tigercat brand is not recommended.

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

2. Apply the parking brake.

3. Turn OFF the engine.

4. Remove the ignition key.

5. Turn OFF the battery disconnect switch.

HYDRAULIC FILTER BYPASS (YELLOW)

6. The filters can be accessed through the panel at the rear of the filter compartment and/or through the rear compartment.

7. Wipe clean the area around the filters and the filter head.

HYDRAULIC FILTER BYPASS (RED)

8. Place a drip pan below oil spill drain valve to catch any oil spillage.

3.21

Tigercat T726G Trencher

Lubrication and Maintenance 9. Wearing face protection (in case of an oil spray), unscrew the old filter.

FILTER HEAD

10. Dispose of the old filter and any oil properly.

11. Check the seating area for the gasket on the filter head and wipe it clean.

GASKET FILTER ELEMENT

12. 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.

FILTR_SEALS 2

O-RING GASKET INSTALLATION

 O-ring Gasket • Remove the used gasket and clean the gasket seat in the filter head.

FILTER HEAD

• Apply clean oil to the new gasket surfaces.

FILTR_SEALS 2

GASKET

• Install the new gasket onto the inside lip of the filter head.

FILTER ELEMENT

• Screw on the new filter until the gasket makes contact.

SQUARE SECTION GASKET INSTALLATION

• Tighten the filter until the top edge makes metal to metal contact with the filter head.

 Square Section Gasket • Remove the used gasket and clean the groove in the filter head.

• Tighten the filter approximately 11/2 additional turns after gasket contact.

• Apply clean oil to the new gasket surfaces.

13. Clean up any spilled oil.

• Install the new gasket into the groove in the filter head.

14. Turn ON the battery disconnect switch.

• Screw on the new filter until the gasket makes contact.

• Tighten the filter an additional 3/4 turn after gasket contact.

15. Turn ON the engine and check for leaks.

16. Run the engine at IDLE speed for at least five minutes to purge any remaining air from the filter system. Then turn OFF the engine and wait 15 minutes to allow air bubbles in the hydraulic tank to rise.

17. Check hydraulic oil level – top up as needed.

3.22

Tigercat T726G Trencher

Lubrication and Maintenance 726GT-030

HYDRAULIC OIL RETURN DIFFUSERS

10. Check for foreign materials and clean where the diffusers screw onto the tubes.

11. Reinstall the diffusers using the hex collar.

12. Reinstall the access cover with new O-ring.

13. Proceed to START-UP PROCEDURE AFTER MAJOR MACHINE MAINTENANCE in THIS SECTION for correct procedure to fill the hydraulic tank and bleed any air in the system.

HYDRAULIC TANK

ACCESS COVER

NOTE: Changing of diffusers, 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.

HYDRAULIC OIL RETURN DIFFUSERS

726GT-030

HYDRAULIC DIFFUSER ACCESS

There are two reusable diffusers on the return tubes in the hydraulic tank.

Changing or cleaning the diffusers: Changing or cleaning the diffusers should be performed only in the event of a pump or motor catastrophic failure or hydraulic oil contamination.

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

2. Apply the parking brake.

3. Turn OFF the engine.

4. Remove the ignition key.

5. Turn OFF the battery disconnect switch.

6. Drain the hydraulic tank into a suitable container via the magnetic drain plug.

7. Remove the round access cover and O-ring.

8. Before removing the diffusers, clean any debris from the bottom of the hydraulic tank and wipe it clean. Note that there is also a magnetic drain plug at the bottom of the hydraulic tank which should be cleaned of any build-up of metal filings.

9. Remove the two hydraulic oil return diffusers using the hex collar at the tube end of the diffusers. Carefully clean the diffusers – they may be damaged by rough handling.

3.23

Tigercat T726G Trencher

Lubrication and Maintenance HYDROSTATIC CHARGE PUMP PRESSURE FILTERS

HYDRAULIC FILTER SERVICING GUIDELINES IMPORTANT! NEVER PRE-FILL HYDRAULIC FILTERS

RETURN FILTERS DRIVE PUMP CHARGE FILTER

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 valves, pumps and motors. The cleanliness of hydraulic oil cannot be guaranteed unless it is always pre-filtered before use.

FUEL FILTER/ WATER SEPARATOR ATTACHMENT PUMP CHARGE FILTER T726G-0114

REAR COMPARTMENT

There are two other full flow filters mounted on filter heads with built-in bypasses. They are located in the rear compartment. For service and replacement intervals refer to SERVICE AND LUBRICATION CHART in THIS SECTION.

16. Turn ON the engine and check for leaks.

17. Run the engine at IDLE speed for at least five minutes to purge any remaining air from the filter system. Then turn OFF the engine and wait 15 minutes to allow air bubbles in the hydraulic tank to rise.

Changing the filters: 1. Park the machine on level ground with the attachment resting on the ground.

2. Apply the parking brake.

18. Recheck hydraulic oil level and top up as needed.

3. Turn OFF the engine.

4. Remove the ignition key.

CASE DRAIN STRAINER

5. Turn OFF the battery disconnect switch.

6. Open the rear compartment door.

CASE DRAIN STRAINER

7. Wipe clean the area around the filter and filter heads.

8. Place a drip pan and rags below the filters to catch any oil spillage.

9. Wearing face protection (in case of an oil spray), unscrew the old filters.

10. Dispose of the old filters and any oil properly.

724E-117

11. Check the seating area for the gasket on the filter heads and wipe them clean.

12. The new filters have an attached gasket. Apply hydraulic oil to the gasket surface.

13. Screw on the new filter until the gasket makes contact with the seat in the filter head.

14. Hand tighten filters an additional 1/2 turn only.

15. Turn ON the battery disconnect switch.

UNDERSIDE OF REAR CHASSIS

A case drain strainer element 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 element requires no regular maintenance over the life of the machine.

Only in the event of a pump or motor catastrophic failure should this element be serviced.

IMPORTANT! The 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.

3.24

Tigercat T726G Trencher

Lubrication and Maintenance

AIR CLEANER

FILTER RESTRICTION INDICATOR ELECTRICAL RESTRICTION INDICATOR SWITCH

OVER CENTRE LATCH 470-075 T726G-053

T726G-087

The air cleaner on this machine uses two filter elements; a primary element and a safety element.

Accessible through a hinged service panel on the right side of the engine compartment.

To ensure maximum engine protection, it is important that the elements be serviced correctly and at proper servicing intervals.

A filter restriction switch is installed on the air cleaner, the switch is used to signal the IQAN MD3 controller when the filter is restricted.

Engine Air Intake Filter Restricted. Service Machine to correct.

An alert message will appear on the MD3 display to indicate the engine air intake filter is restricted.

Replace the primary air filter element if the alert message is displayed. Replace the secondary (safety) filter element every third primary filter change to guarantee maximum performance and reliability.

MECHANICAL AIR FILTER RESTRICTION INDICATOR

A mechanical filter restriction indicator is connected to the outlet side of the air filter.

Replace the primary air filter when the indicator shows RED. This indicator provides a continuous reading whether the engine is running or is shut down. After replacing the filter, reset the indicator by pressing the reset button.

NOTE: Replace the safety element every third primary filter change.

The most common and damaging servicing problems are: Over Servicing Filter elements increase in dust cleaning efficiency as dust builds up on the media. Looks can be deceiving. A filter that looks dirty may actually be 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 engine manufacturer's guidelines, should a filter be replaced.

NOTE: This does not apply to hydraulic oil or diesel engine oil filters.

Improper Servicing Engine exposure to dust during servicing is the largest single reason for engine damage due to dust.

Abrasive dust can easily enter the intake system once the air cleaner cover and protective filter element are removed for replacement. The safety element does reduce this risk but it should also be replaced at every third primary element change.

3.25

Tigercat T726G Trencher

Lubrication and Maintenance IMPORTANT STEPS TO FOLLOW WHEN CHANGING FILTER ELEMENTS

SAFETY ELEMENT

INTAKE TUBING AND JOINTS Check all air intake system components, 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.

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.

AIR CLEANER UNLOADER VALVE

PRIMARY ELEMENT 470-04

AIR FILTER ELEMENTS

1. Release the six over-centre latches and lift cover/dust bowl off of air cleaner assembly .

2. Avoid dislodging dust from filter element(s) by gently pulling the element off the outlet tube.

3. Always clean the sealing surface of the outlet tube before inserting a new filter element.

UNLOADER VALVE

4. Always clean the inside of the outlet tube.

5. Check your old filter sealing surfaces. This will help you detect foreign material on the sealing surface that is causing leakage.

NOTE: Filter elements should never be cleaned and reused. 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.

6. Inspect the new filter for damage.

7. Insert the new filter properly. Apply pressure to the outer rim of the filter not the flexible centre.

8. Check connections and ducts for an air tight fit. Ensure that all clamps, bolts and connections are tight. Check rubber elbows, intake tubing and joints for hardening, cracks, splits or wear points and replace as needed.

Leaks in these locations send dust directly into the engine.

T726G-087

This rubber valve on the tube of the air cleaner housing should be checked before every shift (eight hours). If this valve is missing, damaged or has turned hard, it will cause the air cleaner to become ineffective. The valve should suck closed at ⅓ throttle.

This valve should be replaced every 1000 hours.

Remove the unloader valve from the tube of the air cleaner housing. Check and clean the valve.

A good valve is soft and flexible. If plugged, be sure to check the filter elements as they may need replacing as well. Reattach the valve to the tube.

When operating in high dust conditions, the unloader valve should be checked and squeezed every two hours to release dust buildup.

3.26

Tigercat T726G Trencher ENGINE AIR PRECLEANER

Lubrication and Maintenance How it works: 3

3

ENGINE AIR PRECLEANER

4

2

1 5

T726G-054

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. However, it should be checked periodically to make sure that foreign materials have not plugged the intake area or the exhaust port area.

NOTE: Periodically remove the precleaner assembly and check the spinner assembly for wear or dirt build-up on the blades. Clean the spinner assembly or replace it if the blades are worn.

480-017

PRECLEANER OPERATION

1. Dirty air (1) enters the precleaner, which is clamped onto the engine air intake.

2. Specially-designed vanes (2) , curved and angled to precisely direct air flow, move the dirty air toward the stainless steel impeller (3).

3. The dynamically balanced, one piece impeller (3) (only moving part) creates a tornado inside the housing.

4. The centrifugal force of the tornado expels the heavier than air dirt particles (4), chaff, dust, snow, rain, etc., out the discharge louver.

5. Cleaned air (5) enters the engine air cleaner intake pipe, and the filter element has only the very light particles to remove.

Results: • Cleaner Air for The Engine.

• Longer Filter Element Life.

• Increased Engine Life.

• Increased Engine Performance.

• Reduced Operating Costs.

3.27

Tigercat T726G Trencher

Lubrication and Maintenance DIESEL OXIDATION CATALYST/ SELECTIVE CATALYTIC REDUCTION AFTERTREATMENT SYSTEM (DENOX 2.2 SYSTEM)

NOTICE

The engine on this machine is 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 4 Final emission standard requirements with low fuel consumption. This process is electronically controlled by the DENOX 2.2 system.

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 vapor (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 vapor (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.

• DO NOT IDLE THIS ENGINE FOR MORE THAN 9 HOURS. • DAMAGE TO EMISSION CONTROL SYSTEM WILL RESULT.

63281BENG R0

IMPORTANT! Engine should not idle longer than 9 consecutive hours. 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 will generate excess heat which will cause 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.

3.28

Tigercat T726G Trencher

Lubrication and Maintenance

The DOC/SCR aftertreatment system consists of the following components:

8. DOC Inlet Temperature Sensor 9. Diesel Oxidation Catalyst (DOC)

1. Inlet Humidity and Temperature Sensor

10. Dosing Module (DEF Injector)

2. Diesel Exhaust Fluid (DEF) Tank

11. Outlet NOx Sensor

3. Heater Valve

12. SCR Inlet Temperature Sensor

4. DENOX 2.2 Control System (incorporated into the engine control unit )

13. SCR with Clean Up Catalyst (CUC) 14. Outlet Temperature Sensor

5. Supply Module

15. NH3 Sensor

6. Exhaust Flap on Rear of Turbocharger

16. Mixer Tube (Incorporated into DOC outlet)

7. DOC Inlet NOx Sensor

13

9

12

10

15

14 11 7 8

4 3 AIR CLEANER

1 6

T726G-124

5 T726G-122

SCR AFTERTREATMENT SYSTEM COMPONENTS

3.29

2

Tigercat T726G Trencher

Lubrication and Maintenance

HC - HYDROCARBONS NOx - NITROGEN OXIDES CO - CARBON MONOXIDE NH3 - AMMONIA N2 - FREE NITROGEN H2O - WATER CO2 - CARBON DIOXIDE

HUMIDITY SENSOR AIR FILTER

SUPPLY MODULE

EXHAUST FLAP

HC NOx

ECU

NOx SENSOR

CO

DEF QUALITY SENSOR

ENGINE

NOx SENSOR

NH3 SENSOR

N2

DOC

TEMPERATURE SENSORS

HEATER VALVE (CIRCULATING ENGINE COOLANT)

MIXER TUBE CUC

H 2O

DEF LEVEL SENSOR

SCR NH3

CO2

DEF TANK

DOSING MODULE

CATALYTIC CONVERTER

630E-276

DOC/SCR AFTERTREATMENT SYSTEM

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 vapor (H2O). It also converts nitrogen oxide (NO) into nitrogen dioxide (NO2) which enhances the performance of the SCR catalyst.

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: by reacting with the oxygen in the exhaust gases the ammonia is converted into free nitrogen (N2) and water vapor (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.

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.

The first phase of the SCR process takes place in the first part of the catalytic converter: high temperature exhaust gas evaporates the DEF solution instantly and, by hydrolysis, converts it into ammonia (2NH3) and carbon dioxide (CO2).

3.30

Tigercat T726G Trencher

Lubrication and Maintenance

DIESEL EXHAUST FLUID (DEF) TANK HEATER UNIT

DEF TANK

DEF QUALITY SENSOR H845D-134

DEF QUALITY SENSOR H845D-133

DEF TANK

COOLANT HEATER COIL

The DEF tank is located in the compartment below the fuel tank in the right rear corner of the machine. The DEF tank fill cap can be accessed through a door on the front of that compartment.

The DEF tank fill point is equipped with a strainer to prevent contaminants from entering the tank.

DEF tank capacity is 80 L (21 US gal). DO NOT overfill tank. This 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 main display of the IQAN MD3 controller, below the fuel gauge.

WARNING Use only diesel exhaust fluid (DEF) which meets ISO 22241 specifications. NEVER fill the DEF tank with any other fluid.

DEF fluid 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.

The DEF tank includes a fill location, a heater unit and a DEF quality sensor. The heater unit incorporates a heater coil, heating system inlet/ outlet connections, DEF inlet/outlet connections, a breather, level sensor, temperature sensor, strainer and electrical connector.

Diesel exhaust fluid (DEF) is used by the Selective Catalytic Reduction (SCR) aftertreatment system to lower the concentration of nitrogen oxides from the diesel engine exhaust of this vehicle. DEF is an aqueous urea solution with 32.5% high purity

LEVEL SENSOR

TEMPERATURE SENSOR

620E-082

STRAINER

HEATER UNIT

urea and 67.5% deionized water. Note that DEF may also be referred to as AUS32 or AdBlue® and should meet ISO 22241 specifications. Use only DEF meeting this standard.

It is important to avoid contamination of DEF when filling the tank as this may cause costly damage to the SCR system components and affect the proper operation of the SCR system and the engine.

IMPORTANT! DEF should be stored between -11°C (12°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.

When DEF levels are low or a problem with DEF quality is detected, information messages will be shown on the IQAN MD3 controller.

Note that extremely low DEF levels and/or DEF quality problems may result in derating of engine performance to meet emission standard requirements. Action to correct these problems should be taken immediately to avoid affecting engine performance and damage to the SCR aftertreatment system components. Refer to COMPUTER – MESSAGES in SECTION 2 of the OPERATOR'S MANUAL or SECTION 6 of the SERVICE MANUAL. Refer to DRAINING THE DIESEL EXHAUST FLUID TANK in THIS SECTION. Refer to DEF TANK in SECTION 2 of the OPERATOR'S MANUAL. 3.31

Tigercat T726G Trencher

Lubrication and Maintenance DRAINING THE DIESEL EXHAUST FLUID TANK The DEF tank is located in the compartment below the fuel tank in the right rear corner of the machine. The DEF fill cap can be accessed through a door on the front of that compartment.

DEF TANK (BLUE FILL CAP)

TO DRAIN THE TANK: 1. Use the DEF level indicator on the IQAN MD3 controller to estimate the container capacity required to properly drain the DEF solution. Total tank capacity is 80 L (21 US gal).

41581AUNI R0

2. Park the machine on level ground with the attachment resting on the ground.

DEF TANK

T726G-116

DEF FILL CAP

3. Apply the parking brake.

4. Turn OFF the engine.

5. Remove the ignition key.

6. Turn OFF the battery disconnect switch.

7. Remove the DEF fill cap. The DEF tank is equipped with a drain plug accessible through an access plug on the bottom of the compartment.

41581AUNI R0

8. Drain the DEF solution into a suitable container.

9. Once the fluid has been drained, clean the inside of the tank with DEF fluid or distilled/ demineralized water only if required.

Thoroughly drain the tank after cleaning

DEF TANK

10. Replace the drain plug and the DEF fill cap.

SENSOR

If any DEF fluid has spilled, rinse well with water.

H845D-134

NOTE: To avoid contamination and ensure clean fluid, do not re-use DEF. Re-fill tank with new DEF only.

WARNING Use only diesel exhaust fluid (DEF) which meets ISO 22241 specifications. NEVER fill the DEF tank with any other fluid.

DEF fluid 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.

3.32

DRAIN PLUG

Tigercat T726G Trencher

Lubrication and Maintenance

HEATER VALVE/HEATED DEF SUPPLY LINES CONNECTOR

Heating: The system can heat up with the DEF pump running. Below are the temperature thresholds: DEF tank heating is ON when tank temperature is < +15°C (+59°F) and OFF when > +17°C (+62.6°F)

COOLANT BYPASS

COOLANT OUTLET

COOLANT INLET 630E-265

HEATER VALVE

The heater valve is located on a mounting bracket on the right side of the engine compartment.

Supply module heating is ON when ambient temperature < -2°C (+28.4°F) and OFF when > 0°C (+32°F) DEF lines heating is ON when ambient temperature < -2°C (+28.4°F) and OFF when > 0°C (+32°F) When conditions require heating the system will thaw DEF within 30 minutes of engine start for proper operation of the aftertreatment system.

Note also that whenever 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.

DENOX 2.2 DOSING SYSTEM

HEATER VALVE

T726G-032

The heater valve controls the flow of engine coolant through the DEF tank heater coil and the supply module when heating of the DEF fluid 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.

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 in the DEF tank and supply module.

724G-010

ENGINE ECU

DENOX 2.2 control system is incorporated into the engine electronic control unit (ECU).

The DOC/SCR aftertreatment system is electronically managed by the DENOX 2.2 control system. 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 and the humidity levels in incoming air.

Defrosting: The system can heat up without the DEF pump running to avoid damage of system components based on set parameters in the engine control system.

3.33

Tigercat T726G Trencher

Lubrication and Maintenance SUPPLY MODULE

DIESEL OXIDATION CATALYST (DOC) T726G-033

RIGHT REAR OF MACHINE

DIESEL OXIDATION CATALYST (DOC) SUPPLY MODULE T726G-025

REAR SERVICE COMPARTMENT

The supply module pump picks up the DEF solution from the tank and sends it under pressure to the dosing module, mounted on the DOC. DEF is injected into the exhaust at the outlet of the diesel oxidation catalyst and upstream of the catalytic converter.

DIESEL OXIDATION CATALYST (DOC) 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 vapor (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.

EXHAUST FLAP

The DOC is fed upstream of the catalytic converter (SCR & CUC) and at its outlet incorporates the mixer tube and the mounting for the dosing module.

T726G-124

EXHAUST FLAP An exhaust flap is located at the exhaust outlet from the engine. The exhaust flap is used to regulate temperature of the exhaust entering the diesel oxidation catalyst (DOC) to optimum levels for proper operation of the aftertreatment system.

3.34

Tigercat T726G Trencher DOSING MODULE (DEF INJECTOR) The dosing module is mounted on the DOC outlet upstream of the catalytic converter. The dosing module injects DEF fluid into the exhaust stream.

Lubrication and Maintenance CATALYTIC CONVERTER

DIESEL OXIDATION CATALYST (DOC) CATALYTIC CONVERTER T726G-033

T726G-033

DOSING MODULE

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.

CATALYTIC CONVERTER

The catalytic converter is located 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 gasses the ammonia is converted into free nitrogen (N2) and water vapor (H2O).

630E-275

MIXER TUBE

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.

MIXER TUBE The mixer tube is incorporated into the outlet of the DOC, upstream from 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.

3.35

Tigercat T726G Trencher

Lubrication and Maintenance

HUMIDITY AND TEMPERATURE SENSOR

TEMPERATURE SENSORS

620E-089

TAG

HUMIDITY & TEMPERATURE SENSOR 620E-087

TEMPERATURE SENSOR

Three temperature sensors are mounted at the inlet of the diesel oxidation catalyst, and the ATS system, one in the inlet and outlet of the catalytic converter. These three sensors send exhaust temperature signals to the DENOX 2.2 control system. The control system uses this information to calculate the amount of DEF fluid to be injected into the system.

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 fluid to be injected into the system.

ELECTRONIC CONTROL UNIT

NOTE: All three temperature sensors are identical, however location should be noted for analysis purposes when replacing a temperature sensor.

SENSOR

630E-264

NH3 SENSOR

NH3 SENSOR The NH3 sensor is mounted at the outlet of the catalytic converter. The NH3 sensors detect and send information about the NH3 levels in the exhaust. This information is used to calculate the amount of DEF fluid to be injected into the system and to monitor DOC/SCR aftertreatment system operation.

Refer to APPROVED ANTI-SEIZE PASTES FOR EXHAUST/AFTERTREATMENT SENSORS in THIS SECTION.

3.36

Tigercat T726G Trencher NOx SENSOR

Lubrication and Maintenance APPROVED ANTI-SEIZE PASTES FOR EXHAUST/AFTERTREATMENT SENSORS If replacement of these components is necessary in the field, NOx sensors and NH sensors are pre-coated at the factory with the required antiseize. The application of anti-seize should not be required.

ELECTRONIC CONTROL UNIT

3

In the event anti-seize must be re-applied, only the following approved products should be used: • NOx sensors – Weicon® High Tech anti-seize only

CERAMIC SENSOR

620E-088

• NH3 sensor – Loctite® X203 Dry Film Moly anti- seize

NOx SENSOR

The inlet NOx sensor is mounted upstream of the diesel oxidation catalyst. The outlet NOx sensor is mounted at the outlet of the catalytic converter. 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 fluid to be injected into the system and to monitor DOC/SCR aftertreatment system operation.

Each NOx sensor consists of ceramic sensor and an electronic control unit linked by a cable.

The sensor detects the concentration of nitrogen oxides in the exhaust.

IMPORTANT! When checking or replacing any sensor or plugs in the exhaust or the aftertreatment system, it is important to use only approved anti-seize as specified by Tigercat.

Use of non-approved compounds can affect the operation of the NOx and NH3 sensors and cause a malfunction of the aftertreatment system. This may result in poisoning of the SCR catalyst and require replacement of expensive aftertreatment system parts.

The sensor, cable and control unit are considered to be one part for service/replacement purposes.

Cable length cannot be changed as this will affect the proper operation of the sensor.

3.37

Tigercat T726G Trencher

Lubrication and Maintenance DIESEL EXHAUST FLUID (DEF) HANDLING AND STORAGE Diesel exhaust fluid (DEF) is an aqueous urea solution with 32.5% high purity urea and 67.5% deionized water. Note that DEF may also be referred to as AUS32 or AdBlue and should meet ISO 22241 specifications. Use only DEF meeting this standard.

It is important to avoid contamination of DEF as this may cause costly damage to the 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 shown on the IQAN MD3 controller. Note that DEF quality problems may result in derating of engine performance to meet emission standard requirements. Action to correct DEF quality problems should be taken immediately to avoid affecting engine performance and damage to SCR aftertreatment system components. Refer to COMPUTER – MESSAGES in SECTION 2 of the OPERATOR'S MANUAL or SECTION 6 of the SERVICE MANUAL.

FILLING THE DEF TANK • Always clean the area around the DEF fill cap and avoid introducing contaminants into the DEF tank when filling.

• Always use only DEF which meets ISO 22241 specifications. Use of any other fluid will contaminate the aftertreatment system and may pose a safety hazard.

USE OF PROPER STORAGE CONTAINERS • To prevent contaminants from affecting DEF quality it should be handled only in storage, transport and filling containers intended exclusively for that purpose.

• Polyethylene or stainless steel containers are recommended. Refer also to DEF manufacturer's recommendations.

• DEF is corrosive to metals other than stainless steel. Transport in metal containers other than stainless steel will result in contamination.

PROPER STORAGE CONDITIONS TO MAXIMIZE SHELF LIFE

• DEF should be stored between -11°C (12°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.

For safety information refer to DIESEL EXHAUST FLUID (DEF) in SECTION 1 of THIS MANUAL. AVOID DEF QUALITY PROBLEMS WITH PROPER HANDLING PRACTICES Most DEF quality problems can be avoided entirely with a little care and proper handling of DEF fluid.

• DEF quality problems can often be avoided with proper storage and handling practices to maximize shelf life.

• DEF storage areas should always be out of direct sunlight and away from heat sources to avoid reducing shelf life.

WARNING Use only diesel exhaust fluid (DEF) which meets ISO 22241 specifications. NEVER fill the DEF tank with any other fluid.

DEF fluid 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.

• DEF shelf life is limited. It should be consumed on a first in first out basis, within manufacturer's recommended shelf life limits.

DEF beyond manufacturer's recommended shelf life limits may not meet ISO 22241 specifications.

3.38

Tigercat T726G Trencher

Lubrication and Maintenance

FUEL TANK

FUEL LEVEL SENDER

REFUELLING 1. Park the machine on level ground, turn OFF the engine and allow machine to cool.

FUEL FILL CAP

S≤15 mg/kg

DO NOT refuel while smoking or near flames ULTRA LOW SULFUR or sparks.

FUEL ONLY 36686AUNI R0

2. Clear obstructions from steps and handles needed to access the fuel tank.

FUEL TANK

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

T726G-019

Located at the right rear of the machine, the fuel tank has a capacity of 552 L (146 US gal). The fuel fill cap is located under a hinged cover on the top of the tank. The fuel level sender is located under a bolted on cover on the top of the tank. The fuel level sender sends a signal to the IQAN MD3 controller which displays an on screen fuel level gauge.

718E-037

FUEL NOZZLE HOLDING BRACKET 726GT-014

4. Before climbing onto the machine to refuel, secure the fuel nozzle in the nozzle holding bracket.

DIPSTICK

S≤15 mg/kg ULTRA LOW SULFUR FUEL ONLY 36686AUNI R0

FUEL FILL STRAINER

5. Once safely on the machine open the cover on top of the fuel tank (if equipped) and clear any debris from around the fuel fill cap.

6. Remove the fuel fill cap slowly to allow pressure to escape from the tank.

7. Inspect the fuel fill cap gasket.

8. Inspect the fuel fill strainer located under the fuel fill cap for debris or damage.

9. 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.

FUEL TANK DIPSTICK/FUEL FILL STRAINER 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 fuel fill strainer. DO NOT drop the dipstick into the filler tube or it will punch a hole in the bottom of the fuel fill strainer. The fuel fill strainer should be removed and cleaned every 125 hours (reach in and lift it out). Replace the fuel fill strainer if it is damaged.

10. When refuelling is complete place the fuel nozzle back in the holding bracket.

11. Install the fuel fill cap hand tight before closing the fuel fill cap cover.

12. Climb off the machine.

13. Remove the fuel nozzle and grounding strap (if applicable).

14. Before restarting the machine, check that no other personnel have moved into the hazardous area and sound the horn.

3.39

Tigercat T726G Trencher

Lubrication and Maintenance CHECKING THE AIR CONDITIONING SYSTEM Any service work must be performed by authorized A/C technicians. The system should be charged with R134a refrigerant only.

Polyalkylene glycol (PAG) oil should be present in the system and must be used on O-ring fittings during assembly.

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.

A/C COMPRESSOR

A/C SYSTEM TOTAL CAPACITIES R134a refrigerant PAG

WATER PUMP PULLEY

1.7 kg (3 lb 12 oz)

SERPENTINE BELT

88.7 ml (3 oz)

The compressor and charge valves are located on the right side of the engine. The condenser core is accessed from the left side of the machine and the receiver drier is accessed from the right side of the machine behind the cooler package. The evaporator core is located under the operator's control panel, accessed through the right side cab door.

ALTERNATOR

BELT TENSIONER 470-05

CHECK SERPENTINE BELT

CAUTION Use compressed air for cleaning only when the machine is cold to avoid the risk of fire caused by debris contacting hot surfaces.

If using compressed air for cleaning, use at 2.07 bar (30 psi) or less.

Always use personal protective equipment to guard against flying debris HYDRAULIC OIL COOLER T726G-037

A/C CONDENSER

RADIATOR

CHARGE AIR COOLER

CAUTION

COOLER PACKAGE

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 that debris removed from one area of the machine does not accumulate on other areas of the machine.

Use this checklist to maintain system between service intervals.

1. Check the serpentine drive belt tension.

2. Check air intake filters and clean as required.

3. Check the condenser core for dirt and debris.

Clean as required. Refer to CLEANING A/C CONDENSER AND COOLING ASSEMBLY in SECTION 2 of the OPERATOR'S MANUAL. 4. Check the evaporator core and the inside of the A/C housing for dirt and debris. Clean as required.

5. Run air conditioning system for three to five minutes.

6. Check to see that thecompressor clutch will engage.

3.40

Tigercat T726G Trencher

Lubrication and Maintenance

START-UP PROCEDURE AFTER MAJOR MACHINE MAINTENANCE This procedure should be followed: • After major service or a rebuild.

ATTACHMENT PUMP CASE DRAIN

• Whenever the machine has been drained of hydraulic oil.

DRIVE PUMP CASE DRAIN

• When any major component has been removed, repaired or replaced.

• If the engine fuel supply has been disconnected or drained, refer to priming fuel system procedure in the engine OPERATION AND MAINTENANCE MANUAL. PRE-STARTUP AND FILLING 1. Check oil levels in the engine and the pump drive gearbox.

T726G-123

2. Check coolant level in the radiator/surge tank.

3. Do a final inspection of all fittings and clamps to make sure they are tight and will not leak.

DIPSTICK

4. Do not turn ON the engine. Purge air from the hydraulic system as follows: • Ensure all filters are in place.

• Fill the hydraulic tank if it has been drained.

• Fill all the pumps and motors with pre-filtered hydraulic oil through the highest case drain ports.

DISCONNECT ENGINE HARNESS T726G-059 ENGINE DIPSTICK

470-073X

• Bleed air from the attachment and drive pumps by loosening the case drain hose fittings at each pump connection.

• Continue filling the hydraulic tank using the 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.

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.

• Proceed to MACHINE START-UP procedure.

3.41

Tigercat T726G Trencher

Lubrication and Maintenance MACHINE START-UP Before beginning this procedure, perform the PRE-STARTUP AND FILLING steps outlined earlier in THIS SECTION.

5. Crank the engine for five seconds, then wait for five seconds. Check the charge pressure gauges during cranking to observe the pressure readings. Repeat five times to pump oil into pumps and system components.

1. Ensure the articulation lock bar is installed.

NOTE: If charge pressure gauges do not indicate a rise in pressure, check for possible cause (air in system, leaks, loose hose fittings, pumps not turning, etc.).

Repair problem. Repeat step 5 until a rise in charge pressure is noticed.

CAUTION

6. Reconnect the engine ECU chassis multi-pin connector.

Machine operator must ONLY take directions from the person doing the set-up.

470-073X DISCONNECT ENGINE HARNESS T726G-059 ENGINE ECU CONNECTOR

7. Turn key switch to the RUN position and observe IQAN MD3 controller display.

WAIT for the screen to display the gauges before turning ON the engine.

2. Disconnect the engine ECU chassis multi-pin connector (prevents engine starting).

T726G-123

3. Install a 0–70 bar (0–1000 psi) gauge on drive pump and attachment pump to check charge pressures at the test ports. Watch the gauges closely.

4. Close the cab doors, turn the ignition key switch to the RUN position and depress the interlock reset switch. This will allow pilot oil to circulate and refill the pilot and case drain circuits during the following cranking procedure.

8. Turn ON the engine. If charge pressure does not rise within 20 to 30 seconds, turn OFF the engine. If charge pressure is between 18–31 bar (260–450 psi), run the engine at IDLE for 20 minutes.

Check engine oil pressure in cab.

See COMPUTER, ENGINE MENU in SECTION 2 of the OPERATOR'S MANUAL Do not operate any functions.

9. With the engine at IDLE, parking brake ON, hold foot brake down, bleed brakes in rear axle.

3.42

Tigercat T726G Trencher

Lubrication and Maintenance

IMPORTANT! Without an attachment 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.

CRANK ARM

HYDRAULIC OIL TANK

SIGHT GAUGE, HYDRAULIC OIL LEVEL

LINK ARM

T724G-063

HYDRAULIC OIL TANK

13. Top up the radiator with clean coolant.

14. With cylinders fully retracted, check hydraulic oil level.

BOOM ARM

718E-028

CRANK, LINK AND BOOM ARMS

10. Set throttle to IDLE 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 at LOW IDLE, slowly operate the steer function right and left a few times. With the parking brake released and at LOW IDLE, slowly operate the drive function forward and reverse a few times.

11. Set throttle to FULL and run each function again for two minutes to flush the circuit.

15. If required, top up the hydraulic oil tank with clean oil using the oil fill pump. For operating instructions see HYDRAULIC OIL HAND FILL PUMP in SECTION 2 of the OPERATOR'S MANUAL. 16. Remove the gauges from the test ports on the 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.

17. Recheck hydraulic oil level and top-up if required.

18. Refer to appropriate section of the service manual to check and set operating pressures.

12. Set throttle to LOW idle and turn OFF the engine.

3.43

Tigercat T726G Trencher

Lubrication and Maintenance CENTRE JOINT

TRANSMISSION

MAINTENANCE OF CENTRE JOINT Maintenance in this area is usually limited to:

By carefully following these procedures, the service life of the transmission will be extended and costly down time will be avoided.

a) Regular lubrication of the two centre joint grease fittings to purge the pivot bearings of debris and water. Refer to SERVICE AND LUBRICATION POINTS in THIS SECTION for lubrication intervals. Use only high quality, lithium based EP2 grease containing molybdenum disulfide.

For additional information, refer to TRANSMISSION in SECTION 8 of the SERVICE MANUAL. DIPSTICK/FILL TUBE

b) Visually checking the centre joint pivot for looseness every 1000 hours. With an observer on the ground, keeping well clear of the centre joint area, perform the following test to check for looseness of the centre joint.

1. Have the operator lift the attachment off the ground and then rapidly raise and lower the head several times to bounce the machine.

T726G-058

Check oil level: Check oil level at end of every 8 hour shift.

2. As the machine bounces, check for motion between the front and rear chassis frame lugs. Also check for a clunking sound at the centre joint area.

Procedure: • Park on level ground, lower attachment to the ground, set parking brake on and turn OFF the engine.

• Clean dirt and debris from around oil dipstick and check oil level.

• If required, add the recommended grade of oil through the dipstick/fill tube.

• Do not overfill.

REAR CHASSIS FRONT CHASSIS

CHECK FOR MOVEMENT IN THIS JOINT AREA

724D-D11

1000 HOUR CHECK

3. Movement between front and rear chassis lugs or clunking of the pivot indicates a loose joint and preload must be checked.

Refer to SECTION 11 of the SERVICE MANUAL for more information.

3.44

Tigercat T726G Trencher

Lubrication and Maintenance

REPLACING THE ENGINE SERPENTINE BELT

PARKING BRAKE

1. Park the machine on level ground.

PARKING BRAKE ASSEMBLY

2. Lower the attachment to the ground.

3. Apply the parking brake.

4. Turn OFF the engine.

5. Remove the ignition key.

6. Turn OFF the battery disconnect switch.

A/C COMPRESSOR WATER PUMP PULLY SERPENTINE BELT

STATIONARY DISCS

SPRINGS

ROTATING DISCS

DRIVE SHAFT ALTERNATOR

BELT TENSIONER

470-05

CHECK SERPENTINE BELT

7. Install a Johnson bar with a ⅜" square drive in the square socket hole of the belt tensioner.

8. Loosen the belt tensioner and remove the serpentine belt.

9. Replace the serpentine belt. Ensure that all of the ribs on the serpentine belt align with the grooves on the engine pulleys.

724E-007 724E-008 724E-112

PARKING BRAKE

The parking brake assembly is installed in the drive line 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 and hydraulically-released.

PARKING BRAKE SWITCH

T726G-055

CONTROL PANEL

A parking brake switch on the instrument panel activates and deactivates the brake, also the brake will be activated when the cab door is open or if the engine is not running. Refer to INSTRUMENT PANEL in SECTION 2 of the OPERATOR'S MANUAL for more details regarding the parking brake switch operation.

3.45

Tigercat T726G Trencher

Lubrication and Maintenance MIDDLE AND REAR DRIVE SHAFT SPLINE LUBRICATION

If grease does not exit from the relief fitting hole, remove drive shaft and inspect for "hardened" grease build up, rust or other contaminants within the drive shaft. Repair or replace the drive shaft.

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 drive shaft 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.

The most common cause of joint and slip spline failure is lack of proper lubrication.

1

726M-012 726E-002

2

REAR SLIP SPLINE LUBRICATION 8. Apply grease to grease nipple (1) until new, clean grease appears at the relief hole at yoke end of slip spline (Figure A).

1

726M-008

REAR SLIP SPLINE

9. Plug or cover relief hole and continue to apply pressure to grease nipple until new, clean grease appears at slip spline seal.

MIDDLE SLIP SPLINE

10. If grease does not appear at slip spline seal and continues to exit from the covered relief hole, remove the drive shaft and inspect for hardened grease build up, rust or other contaminants within the drive shaft. Repair or replace the drive shaft.

MIDDLE SLIP SPLINE LUBRICATION 1. Park machine on level ground, and steer fully to the left or right.

2. Lower the attachment to the ground.

3. Apply the parking brake.

720C-01

4. Turn OFF the engine.

GREASE GUN

5. Remove the ignition key.

6. Turn OFF the battery disconnect switch.

7. Apply grease to grease nipple (1) until new, clean grease exits from the relief fitting (2).

2

1 726M-011

Check to see if grease is exiting from the relief fitting (2). 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.

3.46

GREASE APPEARS AT RELIEF HOLE

FIG. A – REAR DRIVE SHAFT YOKE END

Tigercat T726G Trencher

Lubrication and Maintenance

Torque 6C (⅜″–24 UNF) drive shaft yoke fasteners to 50 Nm (37 lbf-ft) – lubricated.

NOTE: Yoke bolts on axles are metric threads. All other drive shaft bolts are imperial threads.

FRONT DRIVE SHAFT

REAR DRIVE SHAFT

MIDDLE DRIVE SHAFT

724E-112 726M-008 726E-001 726E-002

TYPICAL DRIVE SHAFT INSTALLATION 3.47

Tigercat T726G Trencher

Lubrication and Maintenance FAN CONTROL

The temperature sensor in the hydraulic tank operates in a similar manner to the engine coolant temperature sensor but independently and with a different temperature range. This temperature range depends on the type of hydraulic oil used.

This sensor will signal the XA2 A2 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 will also increase to a maximum 2500 rpm fan speed @2200 rpm engine speed, at this point the temperature of the hydraulic oil will be at the maximum set point or higher.

COOLING SET POINTS

724E-099

Charge Air Min................................................... 60°C (140°F) Charge Air Max.................................................. 82°C (180°F) Engine Coolant Min........................................... 90°C (194°F) Engine Coolant Max.......................................... 95°C (203°F)

XA2 A2 MODULE

This control consists of an electronic processing module – XA2 A2 module, a three position FAN switch in the operator's cab with CLEAN/AUTO/ FULL ON positions for fan control.

FAN SWITCH

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 turn the cooling fan to run at 1200 rpm. This is to ensure that sufficient air flow is available for the cab A/C even while the machine is still warming up.

CAUTION

T726G-055

Before placing the fan switch in the CLEAN (PURGE) position make sure that there are no personnel on the left side of the machine in the area where the fan will expel debris

CONTROL PANEL FULL ON AUTO CLEAN

724G-011

When the engine coolant temperature reaches 90°C (194°F) the sensor on the engine in conjunction with the XA2 A2 module will send a signal to the control valve to start to turn the fan slowly. The fan speed is variable from zero up to a maximum of 2500 rpm fan speed @2200 rpm engine speed. As the temperature of the coolant increases so does the speed of the fan up to the maximum 2500 rpm fan speed @2200 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 position, the XA2 A2 module will signal the control valve to reverse the flow of oil to the motor and turn the fan in reverse. The XA2 A2 module will also turn the air conditioning system OFF for as long as the fan switch is in the CLEAN (PURGE) position.

See COMPUTER, GENERAL SETTING to make adjustments to FAN CLEAN FREQUENCY and FAN CLEAN DURATION in SECTION 2 of the OPERATOR'S MANUAL.

3.48

Tigercat T726G Trencher

Lubrication and Maintenance

TORQUE CHART THREAD DIAMETER

LOCATION Cylinders Pin bolts Piston nut, steer cyl.

Piston nut, boom/tilt cyl.

Gland, steer cyl.

Keeper plate bolts

TORQUE (LUBRICATED) lbf-ft Nm

3/4" UNC 1 1/4" UNF 1 1/2" UNF 3/4" UNC

282-310 930 1640 450 282-310

393-420 1282 2260 620 389-420

1/2" UNC 3/4" UNC

80-88 282-310

109-119 393-420

Engine mounting Bolts, mount to chassis Bolts, brackets to engine Bolts, bracket to pump drive

7/8" UNC M12-1.75 (10.9) 5/8" UNC

364 75 159-175

500 100 216-237

Pump drive gearbox Drive plate to flywheel Bell housing to engine

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 Rear

7/8" UNC 3/4" UNC

364 226

500 310

Wheel bolts

7/8" UNF

500-550

679-745

Transmission housing to frame

7/8" UNC

364

500

Center joint bearing Bearing retaining bolts Pin retaining bolts

Drive shafts Yoke retaining nut, front shaft Pillow block retaining bolts Universal joint bolts Rear & Mid. drive shaft Front drive shaft to Mid. drive shaft Front drive shaft to axle

Torque values pertaining to the engine and attachment are provided in the appropriate manuals.

3.49

Tigercat T726G Trencher

Lubrication and Maintenance

GENERAL TORQUE SPECIFICATIONS

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.

IMPERIAL

GRADE 5 BOLTS

GRADE 8 BOLTS

IMPERIAL BOLT TORQUE SPECIFICATIONS GRADE 5 BOLTS GRADE 8 BOLTS LUBRICATED lbf-ft Nm 8 - 10 11 - 13 20 - 28 27 - 38 33 - 36 45 - 49 52 - 57 71 - 77 80 - 88 109 - 119 115 - 127 156 - 172 159 - 175 216 - 237 282 - 310 393 - 420 455 - 501 617 - 679 682 - 750 925 - 1016 966 - 1062 1310 - 1441 1360 - 1496 1844 - 2027 LUBRICATED lbf-ft Nm 10 - 13 14 - 17 18 - 25 25 - 33 37 - 41 50 - 55 58 - 64 79 - 86 90 - 99 122 - 134 128 - 141 174 - 191 180 - 198 244 - 268 315 - 347 427 - 470 501 - 550 679 - 745 746 - 821 1012 - 1113 1083 - 1191 1469 - 1613 1509 - 1660 2046 - 2250

METRIC

DRY LUBRICATED COARSE THREAD lbf-ft Nm lbf-ft Nm 1/4" - 20 7- 8 10 - 11 8 - 10 11 - 13 5/16" - 18 14 - 18 19 - 24 10 - 15 13 - 20 3/8" - 16 31 - 34 42 - 46 23 - 25 31 - 34 7/16" - 14 49 - 54 66 - 73 37 - 41 50 - 55 1/2" - 13 75 - 83 102 - 112 57 - 63 77 - 85 9/16" - 12 109 - 120 148 - 162 82 - 90 111 - 122 5/8" - 11 150 - 165 204 - 223 113 - 124 152 - 168 3/4" - 10 266 - 293 360 - 397 200 - 220 271 - 298 7/8" - 9 394 - 433 535 - 586 296 - 326 402 - 441 1" - 8 591 - 649 802 - 879 443 - 489 601 - 663 1 1/8" - 7 794 - 873 1077 - 1183 596 - 656 808 - 889 1 1/4" - 7 1120 - 1232 1519 - 1670 840 - 924 1139 - 1252 FINE DRY LUBRICATED lbf-ft Nm lbf-ft Nm THREAD 1/4" - 28 9 - 10 12 - 13 9 - 10 12 - 13 5/16" - 24 17 - 22 23 - 29 16 - 20 21 - 27 3/8" - 24 35 - 39 48 - 53 26 - 29 35 - 39 7/16" - 20 55 - 61 75 - 83 41 - 45 56 - 61 1/2" - 20 85 - 94 116 - 127 64 - 70 87 - 95 9/16" - 18 121 - 133 164 - 180 91 - 100 124 - 135 5/8" - 18 170 - 187 231 - 253 128 - 141 174 - 191 3/4" - 16 297 - 327 403 - 443 223 - 245 303 - 332 7/8" - 14 434 - 477 589 - 646 326 - 359 442 - 486 1" - 12 646 - 711 876 - 965 484 - 534 657 - 724 1 1/8" - 12 891 - 980 1208 - 1328 668 - 735 906 - 996 1 1/4" - 12 1240 - 1364 1682 - 1849 931 - 1024 1262 - 1387

4.8

4.8

4.8

8.8

9.8

10.9

8.8

9.8

10.9

8.8

10

5 5

SIZE

CLASS 4.8 LUBRICATED DRY Nm lbf-ft Nm lbf-ft

12.9

12.9

12.9

10

10

12

10

12

METRIC BOLT TORQUE SPECIFICATIONS

CLASS 8.8 OR 9.9 LUBRICATED DRY Nm lbf-ft Nm lbf-ft

12.9

10.9

10

5

9.8

12.9

12

DRY lbf-ft Nm 11 - 12 15 - 16 26 - 30 35 - 40 44 -48 60 - 65 70 - 77 95 - 104 106 - 117 144 - 158 153 - 168 208 - 228 212 - 233 288 - 316 376 - 414 510 - 561 606 - 667 822 - 904 909 - 1000 1233 - 1355 1288 - 1417 1746 - 1921 1817 - 1999 2464 - 2710 DRY lbf-ft Nm 13 - 14 18 - 19 23 - 28 31 - 38 49 - 54 67 - 73 78 - 86 106 - 116 120 - 132 163 - 179 171 - 188 232 - 255 240 - 264 326 - 358 420 - 462 570 - 626 668 - 735 906 - 996 995 - 1096 1359 - 1486 1445 - 1590 1960 - 2155 2012 - 2213 2728 - 2997

10

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" - 14 1 1/8" - 12 1 1/4" - 12

CLASS 10.9 LUBRICATED DRY Nm lbf-ft Nm lbf-ft

CLASS 12.9 LUBRICATED DRY Nm lbf-ft Nm lbf-ft

M6 M8 M10

4.8 12.0 23.0

3.5 8.5 17.0

6.0 15.0 29.0

4.5 11.0 21.0

9.0 22.0 43.0

6.5 16.0 32.0

11.0 28.0 55.0

8.5 20.0 40.0

13.0 32.0 63.0

9.5 24.0 47.0

17.0 40.0 80.0

12.0 30.0 60.0

15.0 37.0 75.0

11.5 28.0 55.0

19.0 47.0 95.0

14.5 35.0 70.0

M12 M14 M16

40.0 63.0 100.0

29.0 47.0 73.0

50.0 80.0 125.0

37.0 60.0 92.0

75.0 120.0 190.0

55.0 88.0 140.0

95.0 150.0 240.0

70.0 110.0 175.0

110.0 175.0 275.0

80.0 130.0 200.0

140.0 225.0 350.0

105.0 165.0 225.0

130.0 205.0 320.0

95.0 150.0 240.0

165.0 260.0 400.0

120.0 190.0 300.0

M18 M20 M22

135.0 190.0 260.0

100.0 140.0 190.0

175.0 240.0 330.0

125.0 180.0 250.0

260.0 375.0 510.0

195.0 275.0 375.0

330.0 475.0 650.0

250.0 350.0 475.0

375.0 530.0 725.0

275.0 400.0 540.0

475.0 675.0 925.0

350.0 500.0 675.0

440.0 625.0 850.0

325.0 560.0 460.0 800.0 625.0 1,075.0

410.0 580.0 800.0

M24 M27 M30

330.0 490.0 675.0

250.0 360.0 490.0

425.0 625.0 850.0

310.0 650.0 450.0 950.0 625.0 1,300.0

M33 900.0 M36 1,150.0

475.0 825.0 600.0 925.0 675.0 1,150.0 850.0 1,075.0 800.0 1,350.0 1,000.0 700.0 1,200.0 875.0 1,350.0 1,000.0 1,700.0 1,250.0 1,600.0 1,150.0 2,000.0 1,500.0 950.0 1,650.0 1,200.0 1,850.0 1,350.0 2,300.0 1,700.0 2,150.0 1,600.0 2,700.0 2,000.0

675.0 1,150.0 850.0 1,750.0 1,300.0 2,200.0 1,650.0 2,500.0 1,850.0 3,150.0 2,350.0 2,900.0 2,150.0 3,700.0 2,750.0 850.0 1,450.0 1,075.0 2,250.0 1,650.0 2,850.0 2,100.0 3,200.0 2,350.0 4,050.0 3,000.0 3,750.0 2,750.0 4,750.0 3,500.0

3.50

Tigercat T726G Trencher

Lubrication and Maintenance

PRESSURE SETTINGS T726G

With hydraulic oil temperature at 49°C - 60°C (120°F - 140°F) Location

Pressure (bar)

Pressure (psi)

Engine - 8.7 L Cursor T4F/EU S4 Rated - 275 kW (370 hp) @ 1800 rpm Pilot Manifold Pressure Relief Valve Pressure Reducing Valve Drive Pump Charge Pressure Relief Valve Multi Function Valve: · P.O.R. Forward · P.O.R. Reverse Drive Motors - Widerange Drive Motor P.O.R.

Engine rpm 1850 ± 25 High Idle 900 ± 25 Low Idle

46.5 38

675 550

850 850

31

450

1000

348.2 348.2

5050 5050

1800 1800

280

4060

1800

Steer Circuit Steer Valve Main Relief Steer Right Port Relief Steer Left Port Relief

172.4 229.3 229.3

2500 3325 non-adjustable 3325 non-adjustable

1800 1000 1000

Cutter Pump Charge Pressure Relief Valve P.O.R. Forward/Reverse High Pressure Relief - Reverse High Pressure Relief - Forward

24.1 379 138 414

350 5500 2000 6000

1000 1000 1000 1000

179.3 200 200 137.9 137.9 137.9 137.9 200 152

2600 2900 2900 2000 2000 2000 2000 2900 2200

1800 1000 1000 1000 1000 1000 1000 1000 1000

Boom Valve Main 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 Boom Up Port Relief Boom Down Port Relief

Important Notes: 1) All adjustments to be made with hydraulic oil temperature at 49°C - 60°C (120°F - 140°F) 2) Use Boom Lift Lock Support 4128A when working under boom 3) Use Steering Articulation Lock Bar when working on steering

T726G PRESSURE SETTINGS

3.51

Tigercat T726G Trencher

Lubrication and Maintenance

Parker

Assembly Torque The 4-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 on to 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.

The 4-bolt Split Flange consists of 4 main components: •

A body (flange head)

•

An O-ring

•

One captive or two split flange clamps

•

Four bolts and washer

WASHERS BOLTS FLANGE CLAMP

Flange Port Assembly FLANGE HEAD

The steps to properly assemble the flange port clamping bolts are: 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.

5. Hand tighten bolts.

6. Torque bolts in diagonal sequence (see Fig. T9) in small increments to the appropriate torque level listed in Table T6 or Table T7 on this page.

O-RING TAPPED HOLES

FLANGE.JPG

Fig. T8 – 4 Bolt Split Flange Components

FLANGE2.JPG

Dash Size

Flange Size

Inch Bolt (J518)

Torque lbf-ft

Metric Bolt (ISO 6162)

Torque N-m

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

Fig. T9 – Flange Bolt Tightening Sequence

* Does not meet ISO 6162 specification.

Table T6 – Code 61 Flange Recommended Bolt Torque

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

* Does not meet ISO 6162 specification.

Table T7 – Code 62 Flange Recommended Bolt Torque

3.52

Tigercat T726G Trencher

Lubrication and Maintenance

Parker

Assembly Torque

JIC 37 Degree Flare SAE Dash Size

Thread Size

-2 -3 -4 -5 -6 -8 -10 -12 -14 -16 -20 -24 -32 -40

NPTF

Tube Connection Swivel or Hose Connection FFWR FFWR

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

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

Thread Size

-2 -3 -4 -5 -6 -8 -10 -12 -14 -16 -20 -24 -32 -40

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

BSPT

Tube Connection Swivel or Hose Connection FFWR FFWR

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

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

Tube Connection Swivel or Hose Connection TFFT TFFT

Thread Size

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

Thread Size

Tube Connection Swivel or Hose Connection TFFT TFFT

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 J1926 Straight Thread Port Assembly Torques ASSEMBLY TORQUE = 10 % -0 SAE DASH SIZE

2 3 4 5 6 8 10 12 14 16 20 24 32

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

SEAL-LOK lbf•ft (lbf•in) (310) (310) (310) (360) (420) 60 100 135 175 200 250 305 375

N •m 20 20 20 40 46 80 135 185 235 270 340 415 510

TRIPLE-LOK FERULOK PIPE FITTINGS lbf•ft N •m (lbf•in) (85) 10 (155) 18 (260) 29 (280) 32 (350) 40 (620) 70 85 115 135 183 175 237 200 271 250 339 305 414 375 509

PLUGS

ADJUSTABLE

NON-ADJUSTABLE

SEAL-LOK lbf•ft (lbf•in) (310) (310) (310) (360) (420) 60 100 135 175 200 250 305 375

3.53

N •m 20 20 20 40 46 80 135 185 235 270 340 415 510

TRIPLE-LOK FERULOK PIPE FITTINGS lbf•ft N •m (lbf•in) (60) 7 (100) 11 (180) 20 (250) 28 (350) 40 (620) 70 85 115 135 183 175 237 200 271 250 339 305 414 375 509

HOLLOW HEX HP5ON-S lbf•ft (lbf•in) (30) (55) (120) (170) (410) 60 100 135 175 200 250 305 375

N •m 3.5 6 13.5 19 46 80 135 185 235 270 340 415 510

HEX HEAD P5ON-S lbf•ft (lbf•in) (85) (155) (260) (280) (350) (620) 85 135 175 200 250 305 375

N •m 10 18 29 32 40 70 115 183 237 271 339 414 509

Tigercat T726G Trencher

Lubrication and Maintenance

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

Dash Size -03 -04 -05 -06 -08 -10 -12 -14 -16 -20 -24

ORS

Dash Size -04 -06 -08 -10 -12 -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

Dash Size -04 -05 -06 -08 -10 -12 -16 -20 -24 -32

Metric Thread Size mm M10x1 M12x1.5 M14x1.5 M16x1.5 M18x1.5 M20x1.5 M22x1.5 M26x1.5 M27x2 M33x2 M42x2 M48x2

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

3.54

Tigercat T726G Trencher

Lubrication and Maintenance

Tigercat wire colour code chart applicable to all products manufactured by Tigercat Industries Inc. COLOUR FUNCTION EXAMPLE Red Power..........................................(fused and unfused) Black Ground White Engine control.............................(fuel shut-off, start aid) Blue Propulsion Control......................(transmission/reverser solenoids) Purple Monitor, electrical and

mechanical systems....................(air cleaner, alternator, wheel speed, engine speed) Tan Electrical and

electromechanical control...........(park brake, alternator excitation)

(power door motor, backup alarm) Yellow Monitors......................................(flow, pressure, temperature, level) Grey Standard monitor system............(logic module to monitor) Brown Lights Green Electro-hydraulic control.............(pilot solenoids) Orange Accessories.................................(horn, A/C, heater)

COMMON CONVERSIONS To Convert

Into

Multiply By

To Convert

bar .................................. psi ....................... 14.5 cm3 .................................. in3 ........................ 0.06102 °C ...................................°F ......................... (°C x 9/5) + 32 kg .................................... lb ......................... 2.205 kW .................................. hp........................ 1.341 L ...................................... US gal ................. 0.2642 mm .................................. in ......................... 0.03937 Nm ................................. lbf - ft .................... 0.7375 N ..................................... lbf ........................ 0.22481

Into

Multiply By

in3 .................................... cm3 ..................... 16.39 °F .................................... °C ....................... (°F - 32) / 1.8 US gal ............................. L .......................... 3.785 hp ................................... kW ...................... 0.7457 in ..................................... mm ..................... 25.4 lb ..................................... kg ........................ 0.4535 lbf - ft ................................ Nm ..................... 1.356 psi ................................... bar ...................... 0.06896 in Hg ............................... psi ....................... 0.4912 in H2O ............................. psi ....................... 0.03613 lb ..................................... N ......................... 4.4482

3.55

Tigercat T726G Trencher

Lubrication and Maintenance

3.56