TIGERCAT 845B FELLER BUNCHER SERVICE MANUAL - PDF DOWNLOAD

SERVICE MANUAL TIGERCAT 845B FELLER BUNCHER ISSUE 4.1, DECEMBER 2003

TABLE OF CONTENTS

SECTION INTRODUCTION .............................................................................................................. iii NON-APPROVED FIELD PRODUCT CHANGES ........................................................... iv SAFETY ............................................................................................................................ 1 USING HIGH SPEED DISC SAWS SAFELY ............................ APPEDIX TO SECTION 1 CONTROLS AND OPERATION .............................See separate OPERATOR'S MANUAL LUBRICATION AND MAINTENANCE ............................................................................... 3 HYDRAULIC SYSTEM/ LOAD SENSE CONTROL ........................................................... 4 PILOT SYSTEM/RESERVOIR AND FILTERS .................................................................. 5 ELECTRICAL, GAUGES AND ALARMS ........................................................................... 6 ENGINE START AND STOP ............................................................................................ 7 ENGINE ANTI-STALL ....................................................................................................... 9 TRACK DRIVE ................................................................................................................ 11 BOOM FUNCTIONS ....................................................................................................... 12 SWING ............................................................................................................................ 15 SAW DRIVE .................................................................................................................... 17 TREE CLAMPS AND WRIST .......................................................................................... 18

845BSM00

845B Available Literature Operator's manual ~ English ................. Part Operator's manual ~ French .................. Part Operator's manual ~ Spanish ................ Part Service Manual ~ English ...................... Part Service manual ~ Spanish .................... Part Parts Catalog ......................................... Part Hydraulic Adapters Book ....................... Part Hydraulic Hose assemblies Book ......... Part

No. No. No. No. No. No. No. No.

9726A 10438A 17331A 9725A 19724A 9724A 1472A 3707A

Tigercat

®

Tigercat Industries Inc. P.O. Box 544 Paris, Ontario Canada N3L 3T6 Tel: (519) 442-1000

Fax: (519) 442-1855

Tigercat 845B Feller Buncher

Introduction

ii

Tigercat 845B Feller Buncher Tigercat 845B Feller Buncher

Introduction

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 845B Feller Buncher Serial number 8450501 to 8451499.

The operator's manual will assist the operator with the techniques of proper and safe operation of the 845B Feller Buncher. There is also important information regarding the safe operation of the saw head.

The service manual contains safety and servicing procedures and a preventive maintenance schedule to ensure optimum machine performance.

Section 1 in both the operator's manual and the service manual contains safety information that must be followed. As well, throughout the rest of the manuals 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.

The phrase “and up” appearing in this manual after the serial number implies that the related information is current for any machine serial number HIGHER than the serial number preceding the “and up”.

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.

127-22A

iii

Tigercat 845B Feller Buncher

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 it's 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.

iv

Tigercat 845B Feller Buncher

SECTION 1 - SAFETY DECEMBER 2003 Read and understand this Safety section prior to operating any equipment.

Read and understand all manuals for any attachments or accessories.

CONTENTS - SECTION 1 BATTERY DISCONNECT SWITCH .............................................................. 1.9 CAB EXITS .................................................................................................... 1.6 COOLING SYSTEM ..................................................................................... 1.11 EMERGENCY CAB EXITS ............................................................................ 1.6 ENGINE DOORS ......................................................................................... 1.11 ER BOOM SYSTEM ..................................................................................... 1.12 EXHAUST FUMES ....................................................................................... 1.12 FELLING TREES ........................................................................................... 1.9 FIRE PREVENTION FIRE PREVENTION GUIDELINES ........................................................... 1.14 WHAT ELSE TO DO BEFORE YOU EXPERIENCE A FIRE .................... 1.15 WHAT TO DO AFTER A FIRE ................................................................. 1.16 WHAT TO DO IN CASE OF A MACHINE FIRE ........................................ 1.15 FIRST AID ...................................................................................................... 1.4 FLUID LEAKS .............................................................................................. 1.10 HYDRAULIC PRESSURE HAZARD ............................................................ 1.11 LOOSE CLOTHING HAZARD ..................................................................... 1.11 PARKING HAZARDS ..................................................................................... 1.9 PROTECTIVE CLOTHING ............................................................................. 1.3 SAFETY INTERLOCK SWITCHES ON LEFT ARM REST ............................ 1.7 SAFETY PRECAUTIONS, GENERAL ........................................................... 1.3 SAFETY PRECAUTIONS, OPERATING ....................................................... 1.6 SAFETY PRECAUTIONS, SERVICING ....................................................... 1.10 SAFETY SYMBOLS ....................................................................................... 1.2 SIGNAL WORDS ........................................................................................... 1.2

Tigercat 845B Feller Buncher

Safety

SAFETY SYMBOLS

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

Follow the instructions in the safety message.

Understanding Signal Words

DANGER DANGER identifies the most serious hazards where failure to follow listed procedures would result in a high probability of death or serious injury.

WARNING WARNING denotes a hazard exists which can result in serious injury or death if proper precautions are not taken.

CAUTION CAUTION is used in areas where failure to follow listed procedures may cause personal injury, component damage or subsequent malfunction.

IMPORTANT IMPORTANT is used to focus attention on items that should be checked, controlled, adjusted or cleaned to ensure the efficiency and long term operation of the machine.

1.2

Tigercat 845B Feller Buncher

Safety

GENERAL SAFETY PRECAUTIONS

KEEP BACK 500 FEET

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.

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

When approaching an operating machine on foot, stay at least 500 feet (150M) away until the operator recognizes your presence. Make sure that all harvesting equipment is shut down before advancing to the machine.

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

Follow all instructions from safety inspector and supervisors.

Always avoid the discharge side of a felling sawhead. A sawhead's high-velocity discharge of debris requires a safe separation distance.

WARNING The saw guard must be installed when working on the saw motor hydraulic circuit or when the saw head is not being used.

Before installing or removing the saw guard or locking bolt, saw blade must be at a complete stop and engine must be shut down.

You must be fully trained to operate this piece of equipment. Know the capabilities and the limitations of the equipment. Learn the most efficient operating techniques.

Do not let untrained persons operate the machine.

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.

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

Use the handrails and steps provided when mounting and dismounting from the machine.

Do not climb onto or jump off the machine at any time.

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

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

Do not use the machine foot controls as steps.

Tigercat 845B Feller Buncher

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

GENERAL SAFETY PRECAUTIONS CONTINUED

Check all fluid levels.

When mounting or dismounting the machine always use the 3 point technique; use one hand with 2 feet or 2 hands with 1 foot.

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

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

Avoid mounting or dismounting the machine in areas with slippery surfaces. If this is not possible, clean up or cover slippery surfaces with a non-slip material.

Safety Hazards - Viton Seals O-rings and other seals manufactured of Viton material (fluofine rubber) produce a highly corrosive acid (Hydofluoric) when subjected to temperatures above. 600°f (315°c).

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

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

•

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

•

If these are found, Do Not Touch!!!

•

Determine the material composition of any seals or gaskets, If fluro-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.

•

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

•

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

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

Machine should be washed completely at every major service.

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

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

Check windows and door guards for damage.

NOTE:

Check protective windows for cracks, a damaged window has reduced strength to stop flying objects.

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

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

Maintain a charged fire extinguisher on the vehicle at all times and KNOW HOW TO USE IT. 1.4

Tigercat 845B Feller Buncher

Safety

GENERAL SAFETY PRECAUTIONS CONTINUED

WARNING 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.

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.

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.

WARNING WARNING Battery posts, terminals and related accessories contain lead and lead compounds.

Wash hands after handling.

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.

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.

Maintain a distance of 10 ft. (3m) between the machine or boom and any power line carrying up to 50,000 volts or less plus 1/2 inch (10mm) for each addition 1,000 volts above the 50,000 volt level.

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.

If the machine must be transported, make sure that it is adequately secured to the transporting vehicle.

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

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

1.5

Tigercat 845B Feller Buncher

Safety CAB EXITS

OPERATING SAFETY PRECAUTIONS

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

1. Side 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.

2. Rear window, should be used for emergency exits only.

3. Skylight , this is a third cab exit for use if the side door or rear window exits become blocked.

Shut off engine when refuelling - DO NOT refuel the engine while smoking or near open flame or sparks.

It is important that the operator of the machine be familiar with these emergency exits and how to use them.

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

All three exits should be checked to make sure that they are operational and will function in an emergency.

Sound the machine horn before starting the machine.

For additional information, refer to EMERGENCY EXITS in SECTION 2 of the OPERATOR'S MANUAL.

The operator’s seat is equipped with lap and shoulder harness belts. Use either of these restraint system at all times when operating the machine.

Do not open/remove an escape hatch, skylight or the cab door to increase ventilation when operating the machine.

Start the engine according to the instructions in this manual. Refer to OPERATING MACHINE in SECTION 2 of the OPERATOR'S MANUAL. Never use a liquid starting aid to start an engine.

WARNING

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

1.6

Tigercat 845B Feller Buncher

Safety

OPERATING SAFETY PRECAUTIONS CONTINUED SAFETY INTERLOCK SWITCH ON LEFT ARMREST: The left arm rest is equipped with a safety interlock switch to prevent the machine from being operated while the armrest is in the raised position (pilot system is shut off).

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

NOTE: The engine can be started but the machine functions cannot be operated with the left arm rest up.

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

Secure loose items in the cab.

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

•

Make sure that all safety screens and guards including the skylight are installed and properly secured.

PILOT SYSTEM SHUT OFF SWITCH

229-11

LEFT ARM REST IN "UP" POSITION AND LIMIT SWITCH "OFF"

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

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

When the engine is running, DO NOT allow anyone in areas of the machine where they may be crushed by moving components.

229-10

LEFT ARM REST IN "DOWN" POSITION AND LIMIT SWITCH "ON"

To operate: With the engine running and the left arm rest DOWN, push the pilot reset switch.

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.

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

The left arm rest safety interlock switch (pilot system shut off limit switch) and the pilot reset switch are a safety feature and their function must not be defeated in any way.

1.7

Tigercat 845B Feller Buncher

Safety

OPERATING SAFETY PRECAUTIONS CONTINUED If saw guard has been installed DO NOT remove until at the cutting site. Remove guard before starting engine.

Do not turn on saw blade until machine is at cutting site.

Never travel near co-workers or other pieces of equipment with saw blade turning.

Do not allow people or other pieces of equipment near the felling 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 felling head 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 working on slopes, travel straight up or down the slope to prevent roll-over.

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

NEVER travel across a STEEP slope or side hill: •

As logs are added to the accumulator pocket the handling and the stability of the machine will change.

•

To avoid tip over, keep the felling head as low as possible to maintain a low center of gravity.

•

Always be prepared to dump the load in case of an emergency.

•

Do not overload the machine as this can create an unstable condition and cause a rollover.

1.8

Tigercat 845B Feller Buncher

Safety decks in advance before other equipment arrives.

OPERATING SAFETY PRECAUTIONS CONTINUED

Never work alone. Regularly inform other crew members of your intentions, location and length of time to perform duties.

FELLING TREES Pieces of wood, debris from the ground and even teeth separating from the saw blade become potentially dangerous missiles when thrown from these machines.

Stop the saw blade before leaving the cutting area.

NOTE: The saw blade will continue to free wheel for several minutes after the saw switch has been turned OFF.

Inspect saw teeth, tooth retaining bolts, saw disc and felling head assembly.

To stop the blade from rotating, CAREFULLY lower the saw blade onto a stump. This should be done gently to prevent unnecessary loading of the saw blade, saw housing and bearings.

Ensure that all saw tooth retaining bolts are at correct torque value. Refer to attachment manual for correct values.

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

Replace all worn saw teeth or rotate worn teeth to align unused cutting tips.

Always replace saw tooth retaining bolts when replacing saw teeth.

Inspect saw disc for stress cracks and that saw disc does not wobble due to worn saw shaft bearings.

Never start the machine if the saw blade has missing teeth, teeth retaining bolts or a bent saw disc.

Before leaving operator's cab, lower the felling attachment onto the ground.

If out of the operator's cab for an extended period shut the machine off.

When parking the machine;

Shut down machine immediately if vibration occurs during cutting.

Check that the saw discharge area is clear and undamaged.

When moving from tree to tree with the saw blade turning, take care not to make contact with other vegetation or debris.

Do not over load felling head.

•

Park on level ground only and engage the swing brake.

•

Do not park on a hillside or incline.

•

Lower felling attachment onto level ground.

•

Stop the engine.

•

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

Work within your operating skills, do not attempt to cut down a tree that is too large for the felling head.

Operate so that the chip discharge area of the felling head is not directed at people, livestock, buildings or other machines.

When making the cut, properly position felling head in front of tree and have saw blade running at full rpm.

Always know and control the direction the tree will fall to prevent injury to co-workers or damage other vehicles.

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.

When backing away from a cut, watch out for obstacles in your path.

Before transporting the machine check to ensure that all doors, panels and access covers are installed properly and secured. Improperly secured doors or panels pose a serious danger to pedestrians and other vehicles.

Always travel with felling head as close to the ground as possible, never elevate the felling head unless necessary.

Never use this machine to clear a logging deck on a new tract of timber when the rest of the equipment and operator's are also moving in. Pre-plan to clear 1.9

Tigercat 845B Feller Buncher

Safety DISCONNECT THE MULTI-PIN PLUG FROM THE ENGINE ANTI-STALL CONTROLLER

SERVICING SAFETY PRECAUTIONS

•• 870B-01

This machine is equipped with an electronic horsepower limiting control. Prior to welding, disconnect the multi-pin plug from the engine antistall controller located on the rear inside wall of the cab.

Conduct maintenance inspections at least as frequently as recommended in section 3 of the OPERATOR'S MANUAL. When servicing or repairing equipment, shut the engine down. Turn Master Disconnect switch OFF.

Never use your bare hand to check for fluid leaks.

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

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

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.

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

The radiator and the engine cooling system should be cleaned and serviced daily to maintain moderate engine temperatures.

Prior to welding on any part of the machine, it should be cleaned and a fire extinguisher should be made available at the welding location.

Care must be taken in attaching the welding machine grounding clamp so current does not pass through bearings, especially the swing bearing.

Also, disconnect the negative (-) battery cable from both batteries.

1.10

Tigercat 845B Feller Buncher

Safety

SERVICING SAFETY PRECAUTIONS CONTINUED Pressure can be maintained in a hydraulic system long after the power source and pump have been shut down. Lower the felling head to the ground, stop engine and relieve trapped pressure (from the accumulator on later machines) by operating the joystick several times before performing work on components, or disconnecting any hoses. Also relieve pressure in the hydraulic tank by opening the air vent valve and waiting until the sound of escaping air stops.

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.

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

Before performing work under the boom system ensure it is firmly supported.

When opening or closing power operated engine doors, watch for personnel in door areas.

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

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

Shut off engine. Only remove filler cap when cool enough to touch with bare hands. Slowly loosen cap to first stop to relieve pressure before removing completely.

WARNING Always allow the saw blade to come to a COMPLETE STOP before approaching saw head to make adjustments.

WARNING DO NOT work below or behind a machine that is parked on a grade.

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

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

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

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.

1.11

Tigercat 845B Feller Buncher SERVICING SAFETY PRECAUTIONS CONTINUED

Safety ALWAYS install roof safety strut before working under roof area.

WARNING

ROOF SAFETY STRUT IN POSITION

This machine may be equipped with an ER boom system. Because of this, it may behave in an unexpected manner compared to a conventional boom system.

MACHINE MODELS EQUIPPED WITH AN ER BOOM SYSTEM Pay attention to the following when servicing the ER Boom System: Certain hydraulic circuits on this machine are inter-connected in order to provide level head travel and to recirculate hydraulic oil to reduce heat generation and fuel consumption. As a result, disconnecting hydraulic lines from one cylinder may release pressure in different cylinder at the same time.

Before attempting to disconnect hydraulic hoses or perform work on the boom system, ensure that:-

244-12B

•

INSTALL ROOF SAFETY STRUT

ALWAYS install door safety struts before working in door areas.

(a) The machine is parked on level ground with the head sitting flat on the ground. (b) The stick cylinders are fully extended (fig. 1) or the hoist cylinder fully collapsed (fig. 2).

••

(c) The tip of the stick boom supported .

STRUT

STICK CYLINDERS FULLY EXTENDED 870B-02

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

• TIP OF STICK BOOM FULLY SUPPORTED 845B-42

ER. BOOM SYSTEM. FIG.1 HOIST CYLINDER FULLY RETRACTED

•

TIP OF STICK BOOM FULLY SUPPORTED 845B-43

TYPICAL DOOR SAFETY STRUTS

ER. BOOM SYSTEM. FIG.2

1.12

Tigercat 845B Feller Buncher

Safety

SERVICING SAFETY PRECAUTIONS CONTINUED 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.

Read, understand and follow with all operating safety precautions specified by felling head manufacturer.

1.13

Tigercat 845B Feller Buncher

Safety can fall into other areas of the machine and thereby spread a fire.

FIRE PREVENTION

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

When working in a forest environment, it is impossible to prevent combustible debris from collecting in tight corners of the machine. This debris, in itself, may cause a fire; however, when mixed with fuel, oil or grease in a hot or confined place, the danger of fire is greatly increased.

6. 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 turbulance caused by the journey.

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.

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

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

1. Maintain a CHARGED fire extinguisher on the machine at all times and KNOW HOW TO USE IT. 2. Inspect the machine for any signs of fuel or hydraulic system leakage and check for worn or eroded fuel or hydraulic lines before starting up any equipment.

3. Remove debris and blow out dust regularly from the air intake doors, engine radiator, hydraulic oil cooler and A/C condenser core to prevent overheating of the engine and hydraulics. Refer to CLEANING A/C CONDENSER, OIL COOLER AND RADIATOR in SECTION 2 of the OPERATOR’S MANUAL. 4. Blow off all debris and dust 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 depending on logging conditions.

Visual inspection after blow off to ensure thorough cleanliness is vital. Engine exhaust systems provide numerous small pockets where saw dust, small wood chips and other flammable forest debris can gather. Even small accumulations close to hot exhaust components can ignite and smolder. If dislodged by vibration this smoldering debris

8. Steam clean the engine, transmission, brake, fuel and hydraulic tank compartments of all equipment at least once a month or more frequently depending on logging conditions.

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

10. Shut down equipment immediately when a problem is suspected or smoke is detected.

11. Park the machine at least 50 feet away from other equipment at the end of each shift.

12. Turn the battery disconnect switch to OFF at shut down to avoid loss by electrical short.

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

14. Once a fire has started on a machine hoses will quickly burn through causing pressurized fluids (diesel fuel, hydraulic oil, etc.) to fuel the fire. NEVER leave the machine parked with booms or arches suspended off the ground, as they will inject hydraulic oil into the fire if a supporting hose burns through.

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

1.14

Tigercat 845B Feller Buncher FIRE PREVENTION CONTINUED

Safety WHAT TO DO IN CASE OF A MACHINE FIRE •

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.

•

If the machine is in a dangerous position, attempt to move to a safe position. Lower working attachment to the ground.

17. Use only nonflammable solutions for cleaning the machine or components.

•

Shut the engine off.

•

Activate the fire suppression system*

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

•

Radio or call for help (as appropriate).

•

Exit the machine taking fire extinguisher or water hose (if applicable) with you.

•

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

•

If you can safely do so, attempt to extinguish the fire.

•

A dry chemical fire extinguisher should be used first, if available.

•

Use the PASS method with most extinguishers.

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

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

EQUIPMENT FIRES ADVERSELY EFFECT YOUR ABILITY TO LOG, MAY INCREASE YOUR INSURANCE PREMIUMS DRAMATICALLY OR PREVENT YOU FROM OBTAINING INSURANCE COVERAGE AT ALL. WHAT ELSE TO DO BEFORE YOU EXPERIENCE A FIRE •

Ensure that you are familiar with emergency procedure in the event of a fire.

•

Ensure that your fire suppression system* is charged and functional.

•

Ensure that any hand held fire extinguishers are charged and functional.

•

Ensure that any stored water systems on the machine are charged and functional.

•

Ensure that the nozzle of any hand held extinguishers available at the work site fits within the access holes in the doors of the machine.

•

•

Ensure that you have the proper fire extinguishers on site. Most fires involving mobile equipment will be of the A or B type.

You should have a dry chemical extinguisher rated ABC and a pressurized water extinguisher rated A.

•

Pull the pin. This will allow you to discharge the extinguisher.

•

Aim at the base of the fire. If you aim at the flames (which is frequently the temptation), the extinguishing agent will fly right through and do no good. You want to hit the fuel.

•

Squeeze the top handle or lever. This depresses a button that releases the pressurized extinguishing agent in the extinguisher.

•

Sweep from side to side until the fire is completely out. Once the fire is out, keep an eye on the area in case it re-ignites.

Continued on page 16

Prevent the fire from happening by ensuring that the machine is cleaned regularly and all systems are well maintained. *NOTE: Dry chemical fire suppression systems are offered by Tigercat as an optional installation on some of the Tigercat product lines. Please disregard any references made to fire suppression systems if not installed on your machine.

1.15

Tigercat 845B Feller Buncher FIRE PREVENTION CONTINUED

20229A

Safety WHAT TO DO AFTER A FIRE •

Notify your equipment dealer and or Tigercat Industries Inc. by completing an incident report, Tigercat form number 5101.

•

Ensure that the cause of the fire is determined and all appropriate repairs are completed before returning the machine to work.

•

Ensure that the fire suppression system* is properly serviced and returned to a functional state (if applicable).

•

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

TYPICAL FIRE EXTINGUISHER ACCESS HOLE

Continued from page 15

•

If you are unable to open the access door(s), but can safely reach the fire extinguisher access hole, place the nozzle of the fire extinguisher into the appropriate fire extinguisher access hole and discharge the extinguisher.

•

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

•

Use the pressurized water hose supplied with the machine (if applicable) or a pressurized water extinguisher (if available) after the discharge of a dry chemical extinguisher or suppression system* to remove heat build up from the area. A fire suppressed by a dry chemical powder may re-ignite with the latent heat of any debris in the area.

•

Remain with the machine until help arrives to ensure that the fire does not re-ignite.

1.16

DANGER USING HIGH SPEED DISC SAWS SAFELY This information is intended to encourage logging organizations and operators to develop and practice additional rules that suit particular terrain conditions and job requirements. It is also intended to assist towards a quicker understanding of how and why things can happen when a high speed disc saw is in use; and hence to assist in development of safe operating practices.

The following information is in addition to any safety instructions or recommended safe operating practices that may already be in circulation.

CONTENTS COMMENTS AND INSTRUCTIONS DIRECTION OF THROW ........................................................ 7 HIGH ANGLE WRIST ROTATION ABILITY ............................ 8 RECOGNIZING THE DANGERS ............................................ 7 THROWING LONG WOOD PIECES .................................... 10 DANGERS ................................................................................. 3 FORWARD ................................................................................. 2 BE AWARE OF THE HAZARDS ............................................. 2 OTHER INSTRUCTIONS ....................................................... 3 SAFE PRACTICES ................................................................. 3 SEVERAL TYPES OF HEADS INVOLVED ............................. 2 STORED ENERGY ................................................................. 2 HIGH ANGLE WRIST ROTATION CAPABILITY ......................... 9 SAW HEAD DON’TS ................................................................ 15 TYPE OF HOUSING MAKES A DIFFERENCE ......................... 4

Tigercat

5211A • R2-1101

PAGE 1 OF 16

®

using high speed disc saws safely FORWARD:

Tigercat

®

Several types of heads involved Tigercat wheel type feller-bunchers and crawler feller-bunchers can be supplied with several optional makes and models of high speed disc saw tree felling heads. Because each has certain advantages and disadvantages they are chosen where they best do specific types of work.

Stored energy The saw blade stores energy from the hydraulic motor during the times between tree cuts so that it can supply up to 1000 hp during a 1 sec tree cut. However this rotational energy, if misapplied can result in wood materials or other objects being thrown strongly enough to cause damage and to hurt people.

Be aware of the hazards It is important that users of machines with disc saw felling heads are aware of certain safety precautions that need to be taken. In this section some previously unknown, unexpected safety hazards are illustrated and explained . These should be studied before use of the machinery and then reviewed again after use has begun.

FIGURE 1: BROADSIDE SAW CONTACT WITH A LOG COULD PRODUCE A THROW

FIGURE 2: A SUDDEN MACHINE MOVEMENT MAY CAUSE AN UNEXPECTED THROW AT THE CAB

2

using high speed disc saws safely

Tigercat

®

Safe practices It is understood and expected that logging organizations and operators will develop and practice additional rules that suit (for example) particular conditions of terrain, trees, soil and job requirements. The information given here is intended to assist towards a quicker understanding of how and why things can happen when a high speed disc saw is in use; and hence to assist in development of safe operating practices.

It should not be assumed that all possible dangers have been discovered and described here.

Other instructions It is also understood and expected that all instructions contained in service and operator's manuals for use and maintenance of Tigercat disc saw heads and other disc saw heads installed on Tigercat machines will be followed.

THE DANGERS

There are at least these means by which a rotating disc saw can cause harm by throwing: • The normal throwing of chips from the cut.

• Soil particles are thrown from the ground.

• Loose chunks of wood encountered or produced are tossed by the exposed blade.

• Sticks and debris falling onto the blade or sliding across the blade are struck by the teeth and thrown.

• Metal pieces from the blade or from objects encountered are thrown.

• Wood pieces enter the saw housing and are expelled by the blade.

• In very peculiar cases the saw can throw long lengths of wood as spears.

3

using high speed disc saws safely

Tigercat

®

TYPE OF HOUSING MAKES A DIFFERENCE Since the configuration of the saw housing can affect the safety of its use we need to identify some particular types of housing shapes and guarding being used.

Figure 3 shows a typical commonly used saw housing plan where there is a continuous skirt around the saw except at a mouth opening where the trees are cut and taken. The skirt extends below the saw enough to intercept tangential throw. There are snouts on both sides of the mouth so that if pushed against the side of a felled tree or log the saw teeth will not contact the wood.

THROW ANGLE

IF A SAW HEAD IS PUSHED AGAINST THE SIDE OF A FELLED TREE, SNOUTS PREVENT SAW TEETH FROM CONTACTING WOOD.

•

•

FIGURE 3: TYPICAL COMMONLY USED SAW HOUSING, CONTINUOUS SKIRT WITH OPENING WHERE TREES ARE CUT. SNOUTS ON BOTH SIDES OF THE MOUTH.

4

using high speed disc saws safely

Tigercat

®

Figure 4 shows another commonly used plan. It has no blade guarding snouts so that the saw blade teeth do protrude ahead of the housing. This may be preferred over figures 3 and 5 for dexterity in tree getting.

THROW ANGLE

IF A SAW HEAD WITHOUT SNOUTS IS PUSHED AGAINST THE SIDE OF A FELLED TREE, SAW TEETH WILL CONTACT WOOD.

FIGURE 4: ANOTHER COMMONLY USED HOUSING PLAN WITH NO SNOUTS, BLADE TEETH PROTRUDE AHEAD OF THE HOUSING.

In figure 5 there is a much longer snout on the ingoing side of the mouth, i.e., where the teeth of the rotating blade are entering the housing. The broad side of a log, if nudged, will not contact the saw teeth and more thrown material will be intercepted by the extra length of snout.

THROW ANGLE

NUDGED LOG WILL NOT CONTACT SAW TEETH.

• EXTRA LENGTH OF SNOUT WILL INTERCEPT PORTION OF THROWN MATERIAL.

FIGURE 5: HOUSING USES LONGER SNOUT ON IN-GOING SIDE OF MOUTH WHERE ROTATING BLADE ENTERS HOUSING.

5

using high speed disc saws safely Housing types cont.

Tigercat

®

In figure 6a and 6b there is an additional opening in the housing skirt. Openings in this location are sometimes provided for escape of wood chips produced by the saw teeth in the cut and being taken into the housing.

A CHIP ESCAPE PORT CAN ALLOW THROW BEHIND THE MACHINE

REAR

FRONT

FIGURE 6a

FIGURE 6b

FIGURE 6c

FIGURE 6: ADDITIONAL OPENING IN THE HOUSING SKIRT.

In figure 6c a guard has been added to the chip escape port so that tangential travel of chips and other material is intercepted as soon as it leaves the housing.

Each figure shows a shaded area where normally tangentially thrown material can escape from the saw housing. Deflected and dropped chips escaping below the bottom edge of the housing skirt are not included. The areas and angles are not exact but do show that one head can be different from another.

It is important that the operator familiarize himself with the blade rotation direction, the effectiveness of any snout on the in-going side and which direction any chip escape ports allow material to fly.

6

using high speed disc saws safely COMMENTS AND INSTRUCTIONS

Tigercat

®

Recognizing the Dangers While it may appear that these illustrated danger areas can be visually recognized on the job by observing how far chips fly during a cut, that is only true for chips and other light weight materials.

Metal parts and wooden spears can be thrown to surprisingly greater distances. Even distant personnel on the ground, in other vehicles, or in buildings are at risk if the throw is in their direction.

Direction of throw The direction of possible tangential throw for metal parts and stones is dependent on the housing configuration and might be expected to be the same as observed for the chips. However, these throws can occur at any time the saw is running, in whichever direction the angle of throw is pointed by boom geometry, not just when a cut is being made.

Throw distance The throw distance for metal pieces and stones, can be many times the distance shown by the pattern for chips. More testing and data collection is needed to pin down a “safe distance” but if someone or something is in a place that can be seen by the operator and in the throw direction of a high speed disc saw, then the operation is not safe regardless of the distance.

Safe operating areas These saw heads must not be used in areas where the logging operation does not have control over the presence and movement of people. In particular, clearing of vegetation in urban and populated areas should not be done with a Tigercat manufactured or supplied high speed disc saw. High speed disc saw heads are intended for high productivity wood harvesting in areas remote from normal habitation. The possible presence of people and property within throw range and the likelihood of encountering scrap metal, wire fencing, steel posts and concrete must be respected.

Assessing the potential dangers on the job site The extent of danger from high speed disc saws on the logging operation has to be assessed on the job site, depending on how much other work activity is in the area and whether the operator can do his job of cutting and bunching with good control of throw patterns. Danger is greater if the saw is equipped with detachable, or fragile, or brittle teeth, or if the site contains stones or abandoned metal.

7

using high speed disc saws safely Comments and Instructions cont.

Tigercat

®

Regular maintenance Poor saw maintenance increases these dangers. Some designs that might allow fasteners to wear thin or fatigue and suddenly break, need thorough timely replacement procedures. It is important that the warning signs of missing saw tooth parts or the sounds of striking rocks be heeded and the operation adjusted to avoid danger.

High angle wrist rotation ability When a felling machine is equipped with a high speed disc saw head with a high angle wrist rotation ability it should be determined that the limits of the boom, stick, tilt, wrist, upper leveling and any other freedoms, do not permit a direct throw at the operators cab during normal operation, see figure 7a. It is probably essential that the housing have a long snout on the throw side and that if a chip escape port is used it should be guarded.

With these high mechanical freedom arrangements there is a chance that an unforeseeable operator misadventure or equipment failure could result in an accidental direct or deflected throw at the operators cab, refer to figure 2 and 7b. The cab should be capable of resisting such accidental and ricochet throws. The velocity energy of metal or rock pieces leaving the blade is extremely high. The operators cab cannot be considered safe to routinely operate in the chip throw area, even if it has been especially constructed to prevent penetration by accidentally thrown objects.

8

using high speed disc saws safely

Tigercat

FELLING HEAD • WITH A CHIP ESCAPE PORT AND SHORT SNOUT. • SHOWN IN A HIGH ANGLE WRIST ROTATION POSITION, PLACING OPERATOR'S CAB IN DIRECT LINE WITH UNGUARDED CHIP ESCAPE PORT

FIGURE 7a

PLAN VIEW OF MACHINE SHOWING CLOCKWISE AND COUNTERCLOCKWISE BLADE ROTATION

FIGURE 7b FELLING HEAD • WITH LONGER SNOUT ON THROW SIDE OF OPENING AND WITH A GUARDED CHIP ESCAPE PORT.

FIGURE 7: DISC SAW FELLING HEAD WITH HIGH ANGLE WRIST ROTATION CAPABILITY

9

®

using high speed disc saws safely Comments and Instructions cont.

Tigercat

Throwing long wood pieces Dangers from throws of long wood pieces are illustrated in figures 8 to 11. Tests and experience have shown that when a high speed rotating saw is applied to a loose piece of wood, the wood is either blown or pushed away, without a throw. If the wood is held firmly in all directions and the saw advanced into it at any feed speed, cutting will take place. If the wood is only held against escape from the saw radially, but not held tangentially, then the wood will be both partly cut and partly moved tangentially. In this last case tests have shown that if the piece of wood is backed-up by a solid slippery surface; and if the feed in is very fast; and if the piece of wood is long enough; then the tangential movement is a dangerous spear-like throw.

A SLAB, WHICH COULD LATER BE THROWN, MIGHT HAPPEN WHEN NOT ENOUGH ROOM IN HEAD TO COMPLETELY CUT THE LAST TREE

SLAB

•

SLAB

• FE

ED

IN

FIGURE 8a: HOW A SLAB CAN BE THROWN FROM THE SIDE OF A LOG

TH DIR ROW EC TIO N

SAW HOUSING HAS SKIS, BUT WITHOUT SNOUTS AND BLADE TEETH PROTRUDE AHEAD OF THE HOUSING.

FIGURE 8

THROW ENGAGEMENT DISTANCE FELLING HEAD MOVING INTO SLAB/LOG

®

SLAB

LOG A LONG THROW ENGAGEMENT DISTANCE CAN CAUSE A DANGEROUS SPEAR THROW

• •

FIGURE 8b SIDE VIEW

FEED IN

IF THE SIDE OF A LOG CAN CONTACT THE SAW, THE THROW ENGAGEMENT DISTANCE CAN BE LONG

10

FIGURE 8c TOP VIEW

using high speed disc saws safely Comments and Instructions cont.

Tigercat

®

Figures 8 and 9 show two ways that this might happen in the woods if using the saw head of figure 4 (where the throw contact can be long). A slab, still partly attached to a well backed-up tree bole and wet with sap, makes an ideally bad throw situation which could unintentionally occur in woods work. A small log in a pile of other logs might also be propelled out with enough length of continued contact to reach near saw tip speed.

A SMALL LOG IN A PILE OF OTHER LOGS MIGHT ALSO BE PROPELLED OUT WITH ENOUGH LENGTH OF CONTINUED CONTACT WITH THE BLADE TO REACH NEAR SAW TIP SPEED.

• FE

ED

IN

FELLING HEAD MOVING INTO LOG PILE

FIGURE 9a: HOW A LOG CAN BE THROWN LIKE A SPEAR SAW HOUSING WITHOUT SNOUTS AND BLADE TEETH PROTRUDE AHEAD OF THE HOUSING.

SMALL LOG

THROW ENGAGEMENT DISTANCE LOG PILE

FEED IN

•

•

A SAW HOUSING WITHOUT SNOUTS ALLOWS A LONG THROW ENGAGEMENT DISTANCE

FIGURE 9b SIDE VIEW

FIGURE 9c TOP VIEW

IF THE SIDE OF A LOG CAN CONTACT THE SAW, THE THROW ENGAGEMENT DISTANCE CAN BE LONG

FEED IN

11

using high speed disc saws safely Comments and Instructions cont.

Tigercat

®

Figure 10 shows how a head with snouts does not allow a long throw contact. Although tests show that a short contact length on a long log or tree butt does not result in a spear like throw, this action should nevertheless be avoided because abnormally large chips are sometimes produced and thrown.

UNCUT TREE OR STUMP BACKUP THROW ENGAGEMENT DISTANCE

• WHEN ONLY THE END OF A LOG CAN MAKE CONTACT WITH THE SAW, THERE IS NOT MUCH THROW ENGAGEMENT DISTANCE

FIGURE 10: FELLING HEAD HOUSING WITH SNOUTS DOES NOT ALLOW A LONG THROW CONTACT

FELLING HEAD MOVING INTO LOG

Figure 11 warns that blocks of wood can be tossed in any direction when improvising with a disc saw to trim over-size stumps. A long snout and a slow feed speed lessen danger during stump trimming.

A similar danger of throw may exist when clearing small brush with multiple pass cuts.

FELLING HEAD MOVING INTO STUMP (FEED SPEED)

FIGURE 11: A BLOCK OF WOOD CAN BE TOSSED WHEN TRIMMING STUMPS

12

using high speed disc saws safely Comments and Instructions cont.

Tigercat

®

Saw blade throw gap Saw blades have gaps between adjacent teeth and holders to permit installation and removal of the teeth and to provide spaces to accumulate chips in the cut, see figure 12. Fallen sticks and debris or sticks and debris sliding across the the saw blade can enter these gaps when the blade is rotating and be struck by the teeth and be tossed or thrown. Larger gaps and lower rotation speeds increase these dangers.

THROW GAP

FIGURE 12: SAW BLADE THROW GAP

13

using high speed disc saws safely Comments and Instructions cont.

Tigercat

®

Saw housing entrance and exit space To avoid the ingestion of materials into the housing space above the disc (and later ejection) the ingoing entrance for the saw rim of teeth is kept as small as practical. It is important that this high wear area be maintained at its original size and shape. The outgoing opening is large enough to allow the housing to clean itself and will allow most things inside to be thrown out, see figure 13. Its throw direction and angle must be respected. A long snout on the other side reduces this danger.

THE INGOING ENTRANCE OF THE HOUSING FOR THE SAW RIM OF TEETH SHOULD BE SMALL

THE OUTGOING OPENING IS LARGER TO ALLOW THE HOUSING TO CLEAN ITSELF AND WILL ALLOW MOST THINGS INSIDE TO BE THROWN OUT

FIGURE 13: SAW BLADE ENTRANCE AND EXIT SPACE

14

using high speed disc saws safely Comments and Instructions cont.

Tigercat

®

This information is offered by Tigercat as part of interim action to make saw heads safer. It is based on what has recently been reported from the field and on tests conducted on proving grounds.

Tigercat is continuing to do design and testing of tree felling machinery towards achieving greater safety in the woods. Tigercat would be thankful for written reports describing any unsafe happenings, including near misses, in the use of felling heads and their carriers.

The following are some “SAW HEAD DON’TS” that apply particularly to throw prevention.

Do not point the throw of a disc saw head in a direction towards people, vehicles or buildings at any visible distance.

Do not operate in a way that throws chips in a direct-line at the machine cab.

Do not push hard with the saw against anything except a standing tree to be cut.

Do not mix new sharp teeth with old dull teeth on the same saw.

Do not change the blade rotation from its designed direction in the head.

Do not over speed the blade rpm.

Do not remove or shorten snouts provided by the head manufacturer or installer.

Do not neglect tooth fastening inspection, maintenance and replacement.

Do not neglect to repair worn or damaged saw housings.

Do not neglect to replace any covers removed for service or clean out.

Do not count on skis to give the throw protection that snouts do.

Do not nudge loose short pieces with the front of any type of head.

Do not nudge anything, even long logs, with the front of a head which has no snouts.

Do not cut short small stalks when blade speed is low.

Do not operate a high speed disc saw in a populated area.

Do not assume that visitors and other workers are aware of disc saw dangers.

Do not assume that the operator will spare you, a visitor, from danger.

Do not select and operate heads that throw rearward.

Do not select and operate heads with unnecessarily wide throw angles.

Do not neglect to read and follow all instructions provided by the saw and head manufacturers.

15

using high speed disc saws safely

Tigercat

16

®

Tigercat 845B Feller Buncher SECTION 3 - LUBRICATION & MAINTENANCE CONTENTS - SECTION 3 AIR CLEANER MAINTENANCE AIR CLEANER .......................................................................................... 3.20 IMPROPER SERVICING ...................................................................... 3.22 AIR CLEANER UNLOADER VALVE ......................................................... 3.20 ENGINE AIR PRECLEANER .................................................................... 3.20 FILTER RESTRICTION INDICATOR ....................................................... 3.21 INTAKE TUBING AND JOINTS ................................................................ 3.21 AIR CONDITIONING SYSTEM A/C SYSTEM TOTAL CAPACITIES ........................................................ 3.11 CHECKING SYSTEM ............................................................................... 3.10 EMERGENCY EXITS, CHECK MONTHLY .................................................... 3.3 ENGINE AIR CLEANER MAINTENANCE ................................................... 3.20 FILTER AND LUBRICATION SCHEDULE ..................................................... 3.7 FILTERS CASE DRAIN, SAW .................................................................................. 3.16 FUEL FILTER/WATER SEPARATOR ...................................................... 3.12 FUEL TANK STRAINER ........................................................................... 3.13 HYDRAULIC OIL IN-TANK RETURN FILTERS ........................................ 3.17 HYDRAULIC OIL PRE-FILL FILTER ......................................................... 3.16 PILOT FILTER .......................................................................................... 3.15 SERVICING GUIDELINES FOR OIL FILTERS ......................................... 3.14 FIRE PREVENTION,.... ALSO SEE SECTION 1, SAFETY ........................... 3.3 GENERAL MAINTENANCE ........................................................................... 3.3 HYDRAULIC OIL RESERVOIR CHANGING HYDRAULIC OIL FILTERS ................................................... 3.17 CHANGING HYDRAULIC OIL STRAINERS ............................................. 3.18 HYDRAULIC OILS ......................................................................................... 3.8 LUBRICATION SCHEDULE ........................................................................... 3.7 NEW MACHINE MAINTENANCE .................................................................. 3.2 FIRST 50-100 HOUR INSPECTION AND SERVICE REPORT .................. 3.2 INITIAL PRE-DELIVERY INSPECTION ...................................................... 3.2 TIGHTENING POINTS ............................................................................... 3.2 OIL LOST FROM LEAKAGE .......................................................................... 3.2 PRESSURE SETTING PROCEDURES ...................... SEE SERVICE MANUAL PRESSURE SETTING VALUES ................................. SEE SERVICE MANUAL PREVENTIVE MAINTENANCE SCHEDULE ................................................. 3.2 SCHEDULED MAINTENANCE FREQUENTLY ............................................................................................ 3.4 8 HOURS .................................................................................................... 3.4 24 HOURS .................................................................................................. 3.4 125 HOURS ................................................................................................ 3.5 250 HOURS ................................................................................................ 3.5 500 HOURS ................................................................................................ 3.6 1000 HOURS .............................................................................................. 3.6 2000 HOURS .............................................................................................. 3.6 3000 HOURS .............................................................................................. 3.6 SWING DRIVE GEARBOX LUBRICATION ................................................. 3.10 TORQUE CHART, GENERAL ..................................................................... 3.25 TORQUE SETTINGS, RECOMMENDED .................................................... 3.24

DECEMBER 2003

Tigercat 845B Feller Buncher

Lubrication and Maintenance

PREVENTIVE MAINTENANCE SCHEDULE FOR 845B FELLER BUNCHER NEW MACHINE MAINTENANCE

*INITIAL PRE-DELIVERY INSPECTION:PERFORM THE INITIAL PRE-DELIVERY INSPECTION USING Tigercat FORM NUMBERS 5281 AND 5282; "PDI AND 50-100 HOUR INSPECTION REPORT"

*FIRST 50-100 HOUR INSPECTION AND SERVICE REPORT:WITH THE OWNER'S MECHANIC PRESENT, PERFORM AN INSPECTION AND SERVICE ACCORDING TO THE Tigercat FORM NUMBERS 5281 AND 5282; "PDI AND 50-100 HOUR INSPECTION REPORT" THIS MUST BE COMPLETED WITHIN THE FIRST 50-100 HOUR TIME FRAME.

*IMPORTANT: TO QUALIFY FOR CONTINUED WARRANTY, THIS REPORT MUST BE COMPLETED AND RETURNED TO Tigercat Industries Inc. WARRANTY DEPARTMENT.

Tightening points:~

NOTE: Use of filters other than genuine Tigercat replacement filters is not recommended.

All hydraulic connections Hose clamps All cylinder and boom pin retainers

Refer to diesel engine service manual and attachment manual for additional required maintenance at this scheduled time period.

Check swing bearing bolt torque Engine mounting bolts Pump mounting bolts

IMPORTANT

Track shoe bolts Track roller retaining bolts

BEFORE DRIVING MACHINE ENSURE THAT THE TRACK TENSION (SAG) IS SET CORRECTLY.

Track sprocket retaining bolts

TRACK SAG MAY BE SET LESS THAN SPECIFIED FOR SHIPPING PURPOSES.

Track drive gearbox mounting bolts Track drive motor mounting bolts

REFER TO SECTION 11 IN THE SERVICE MANUAL FOR THIS PROCEDURE.

Swing gearbox mounting bolts Cab securing bolts

OIL LOST FROM LEAKAGE

Any other loose nut, bolt or fitting LEAKAGE RATE ONE DROP IN 10 SECONDS ONE DROP IN 5 SECONDS ONE DROP PER SECOND THREE DROP PER SECOND DROPS BREAK INTO STREAM

3.2

LOST 0IL (GALLONS) PER PER PER DAY MONTH YEAR 0.112 3.36 40.0 0.225 6.75 81.0 1.125 33.75 405.0 3.75 112.5 1,350.0 24.00 720.0 8,640.0

Tigercat 845B Feller Buncher

Lubrication and Maintenance

GENERAL CHECK EMERGENCY EXITS, MONTHLY~ Two alternate exit routes are provided: rear window emergency exit and skylight/emergency exit. These are only to be used if the side door cannot be opened.

CAUTION ALL HANDLES, STEPS AND PLATFORMS MUST BE KEPT FREE OF GREASE, OIL, FUEL, MUD, SNOW, ICE AND FOREST DEBRIS. Clean around filler caps before checking or adding fluids.

It is therefore essential that these emergency exits be checked at least once per month to ensure they are fully operational.

Clean around hydraulic fittings before breaking connection. Plug or cap immediately.

Refer to EMERGENCY EXIT MAINTENANCE GUIDE in SECTION 2 of the OPERATOR'S MANUAL for checking procedure.

Clean up spills as soon as possible.

Always release pressure in hydraulic tank Before breaking a connection.

FIRE PREVENTION Maintaining your machine properly will greatly extend its life and reduce your operating costs.

Always use clean oil and containers.

Drain dirty oil while still warm.

Fire can result in a machine loss which can be financially devastating.

Do not exceed recommended fluid levels.

Service all hydraulic filters after the failure of a pump, motor, cylinder or valve. Failures of this nature could contaminate the entire hydraulic system.

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.

Top up diesel fuel at each shift to reduce contamination by condensation.

Clean up oil spills on walking surfaces in engine enclosure immediately.

1. Pine needles and bark 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 a fire.

Before welding on machine, be sure the negative battery terminal and the speed control 25 pin connector in cab are disconnected.

When welding, secure ground connection as close to working position as possible to prevent arcing across machined surfaces or through bearings.

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.

Clean away all branches, bark and chips.

Clean up all traces of oil to avoid fires.

Always have a fire extinguisher at hand.

For safety, always lower boom assembly to the ground when leaving cab, leaving machine unattended or during service.

3. Read the fire suppression system manual and have the system serviced regularly by qualified personnel.

Always install roof safety strut when working in engine compartment.

4. In case of fire lower the boom system to the ground and shut off the engine before discharging the fire suppression system.

Clean fire suppression system sensors.

Also refer to FIRE PREVENTION in SECTION 1 of THIS MANUAL for additional information.

3.3

Tigercat 845B Feller Buncher

Lubrication and Maintenance

SCHEDULED MAINTENANCE Clean:~ • Oil cooler, engine radiator and enclosure screens.

FREQUENTLY:~ • Check engine cooling air intake screens for possible restriction

• Remove potentially damaging limbs or sticks.

• Check for debris, snow and ice buildup on emergency exits and remove accumulation immediately.

Check:~ • For leakage around hydraulic components and flexible hoses.

• ER Boom system:

• For loose nuts, bolts and fittings.

Periodically, the main boom must be lifted up as far as it will go and then lowered to operating height in an area free from overhead obstructions in order to circulate hydraulic oil from the cylinders back through the cooler and filters. This oil does not circulate through the cooler or filters during normal horizontal motion and the oil does not get completely changed during normal vertical motion, so it is important that this procedure be followed at least once every hour.

• Condition and tension of fan belts.

• Visually check condition of tracks.

• Conduct an overall visual inspection.

• Refer to diesel engine service manual and attachment manual for additional required maintenance at this scheduled time period.

EVERY 24 HOURS :~ • Perform "frequently" maintenance • Perform 8 hour maintenance

EVERY 8 HOURS:~ • Perform frequently maintenance

And in addition:~

And in addition:~

• Lubricate swing bearing; 1-fitting - 10 shots while swinging

• Check engine coolant level • Check engine oil level • Drain water from fuel/water separator • Check air intake precleaner operation • Check air cleaner unloader valve • Check air intake filter restriction indicator • Check hydraulic oil level Lubricate:~ • Swing pinion; 1-fitting - 10 shots • ‡ Boom joints: 6-fittings - purge with Tilt Link; 12-fittings - purge • ‡ Cylinders; boom, stick & tilt; 6-fittings - purge 8-fittings with ER system ‡ Lubricating cylinder pins and boom joints:1. Ensure machine is on level ground 2. Completely tilt felling head back 3. Fully extend stick boom cylinder 4. Force heel of felling head onto ground 5. While in this position lubricate all cylinder retaining pins and boom joints NOTE: This procedure will allow grease to flow to the normally "loaded side" of the pin/bearing surfaces.

3.4

Tigercat 845B Feller Buncher

Lubrication and Maintenance

SCHEDULED MAINTENANCE EVERY 250 HOURS:~

EVERY 125 HOURS:~ • Perform "frequently" maintenance

• Perform frequently maintenance

• Perform 8 hour maintenance

• Perform 8 hour maintenance

• Perform 24 hour maintenance

• Perform 24 hour maintenance

And in addition check:~

• Perform 125 hour maintenance

• Return filter bypass light is NOT ON with engine running at high idle with oil flow and oil at operating temperature

And in addition:~

• Return filter restriction gauge is in GREEN zone with engine running at high idle with oil flow and oil at operating temperature • High pressure pilot filter restriction indicator is in GREEN zone with engine running at high idle with oil flow and oil at operating temperature • With one level plug at 6 O'clock and the other at 9 O'clock Check track drive gearbox oil level at the 9 O'clock plug • Fluid level in batteries unless maintenance free • Engine rpm

• Check all hydraulic pressures • Lubricate swing drive gearbox lower bearing; 1 fitting - 10 shots.* Do not use a power grease gun. *With swing gearbox at operating temperature slowly add 5 shots of lithium based ep2 to each side of the gearbox. Note: During cold weather applications the swing function must be operated for several hours to achieve operating temperature. Caution: Do not force grease, gearbox failure may result. Do not use winter grease. Grease should purge from gearbox pinion seal.

• Replace engine oil and filter.

• Hydraulic pump and motor securing bolts

• Replace engine fuel filter.

• Check torque tightening points as per new machine maintenance

• Replace filter in fuel filter/water separator.

• Carry out A/C system inspection; Refer to CHECKING THE AIR CONDITIONING SYSTEM in THIS SECTION Visually check for damage to:~ • Main and stick booms • Tracks, track frames and carbody • Swing bearing area • Attachment Make repairs immediately Visually inspect for:~ • Frayed electrical wiring and hydraulic hoses NOTE: Neglecting the proper maintenance of these items can result in fire.

• Wear in any other components Clean/replace:~ • Inspect for debris buildup between radiator and oil cooler • Air conditioner re-circulation filter • Cab fresh air filter • Refer to diesel engine service manual and attachment manual for additional required maintenance at this scheduled time period.

3.5

• Replace air intake primary element.

• Replace oil in track drive gearboxes with one level plug at 6 O'clock and the other at 9 O'clock. Drain from the 6 O'clock plug and fill at the 9 O'clock plug.

Tigercat 845B Feller Buncher

Lubrication and Maintenance

SCHEDULED MAINTENANCE EVERY 2000 HOURS:~

EVERY 500 HOURS:~ • Perform frequently maintenance

• Perform frequently maintenance

• Perform 8 hour maintenance

• Perform 8 hour maintenance

• Perform 24 hour maintenance

• Perform 24 hour maintenance

• Perform 125 hour maintenance

• Perform 125 hour maintenance

• Perform 250 hour maintenance

• Perform 250 hour maintenance

And in addition:~

• Perform 500 hour maintenance

• Replace air intake safety element.

• Perform 1000 hour maintenance And in addition:~

• Replace hydraulic oil pre-fill filter. †

• Replace turbocharger rubber inlet elbow and coupling - High temperatures in this area can cause the rubber to harden

• Replace hydraulic oil return filters (in tank).

• Replace hydraulic oil pilot pressure filter. † • Replace hydraulic oil case drain return filter.†

• Check ALL air intake tubing, rubber couplings and band clamps for signs of wear and leakage

Lubricate:~ • Door and cover hinges; 12 fittings - 1 shot • Roof and door cylinder pins apply oil liberally.

• Drain and refill hydraulic oil tank with recommended hydraulic oil. See "approved hydraulic oils"

• Other door hinges; apply oil liberally Check:~ • Torque on swing bearing and swing gearbox retaining bolts.

It is strongly recommended that a program of regular oil testing be used. Oil change intervals can be established from oil test results

• Torque on track drive gearboxes and motor mounting bolts.

• Check track rollers for leakage. Earlier rollers were filled with oil and later rollers filled with grease, both cases are considered to be maintenance free. If a lubricant leakage is detected the rollers must be removed, repaired and replaced.

EVERY 3000 HOURS:~ • Perform frequently maintenance • Perform 8 hour maintenance • Perform 24 hour maintenance

• Check track idler assembly for leakage, the bearing is filled with oil and is considered to be maintenance free. If a lubricant leakage is detected the idler must be removed, repaired and replaced.

• Perform 125 hour maintenance • Perform 250 hour maintenance • Perform 500 hour maintenance

• Refer to diesel engine service manual and attachment manual for additional required maintenance at this scheduled time period.

• Perform 1000 hour maintenance • Perform 2000 hour maintenance And in addition:~

EVERY 1000 HOURS:~

• Clean/replace filter element in fitting at P1. port on main pump control valve.

• Perform frequently maintenance • Perform 8 hour maintenance • Perform 24 hour maintenance • Perform 125 hour maintenance • Perform 250 hour maintenance • Perform 500 hour maintenance And in addition check:~ • Fuel in-tank strainer

† Use of filters other than genuine Tigercat replacement filters is not recommended.

• Replace air cleaner unloader valve 3.6

Tigercat 845B Feller Buncher

Lubrication and Maintenance

Tigercat® Model 845B FILTER AND LUBRICATION SCHEDULE

2

ENGINE OIL/FILTER

3 4 5

CUMMINS B CUMMINS C FUEL FILTER (ENGINE) FUEL/WATER SEPARATOR INTANK FUEL STRAINER

6 7

AIR INTAKE PRECLEANER AIR INTAKE PRIMARY ELEMENT

8

AIR INTAKE SAFETY ELEMENT

9

HYDRAULIC RESERVOIR

10

HYDRAULIC OIL PRE-FILL FILTER

11

HYDRAULIC OIL RETURN FILTERS, (IN TANK)

12

HYDRAULIC OIL PRESSURE FILTER, PILOT

13

HYDRAULIC OIL CASE DRAIN FILTER

CHK CHK

REP

DRN

REP REP

16.4 18.9

4.3 5

QTY

10

60% ANTIFREEZE ** 40% DISTILLED WATER SEE ENGINE MANUFACTURER’S SERVICE MANUAL

CHK CHK

1 1

REP REP

1

CHK

D/R

170

45

TRACK DRIVE GEARBOX;

15 16

TRACK ROLLERS AND IDLERS CHECK FOR OIL LEAKAGE SWING BEARING ***

17

SWING PINION

18

SWING GEARBOX LOWER BEARING

19

BOOM,STICK AND TILT JOINTS: - STANDARD…………………………...

- STANDARD WITH TILT LINK………..

- ER BOOM SYSTEM…………………

LUB

CYLINDERS; BOOM, STICK AND TILT:- STANDARD …..

- ER BOOM SYSTEM…..

LUB

1

REP †

1

CHK

REP

2

CHK

REP †

1

REP †

1 REP

14

21 22 23

38

1 1

MAIN PUMP PILOT FILTER SCREEN

20

3000

2000

1000

500

CHANGE COOLANT EVERY 2 YEARS

REMARKS/LUBRICANT USG

COOLING SYSTEM

CAPACITY LITRE

1

250

DESCRIPTION

125

SERVICE EVERY

8

SERVICE POINT NO.

REFER TO Tigercat OPERATOR'S MANUAL FOR FURTHER INFORMATION

†† D/R CHK

CHK LUB 24HR *** LUB LUB *

DRAIN TANK, CLEAN OR REPLACE AS NECESSARY CLEAN BOWL AS REQUIRED CHECK FILTER RESTRICTION INDICATOR WITH ENGINE RUNNING. CLEAN UNLOADER VALVE EVERY 8 HOURS, REPLACE EVERY 1000 HOURS. DRAIN AND REFILL AS REQ’D BY SEASONAL OIL CHANGE SEE APPROVED HYDRAULIC OILS* *Tigercat RECOMMENDS REGULAR USE OF AN OIL TESTING PROGRAM.

CHECK RESTRICTION INDICATOR LIGHT IN CAB WITH ENGINE RUNNING AT FULL AND WITH FLOW CHECK RESTRICTION INDICATOR ON FILTER WITH ENGINE RUNNING AT FULL AND WITH FLOW

1

FILTER SCREEN LOCATED IN FITTING AT 'P1' PORT CONNECTION ON CONTROL VALVE ON MAIN PUMP

11

2.9

2

FILL WITH S 75W-90 (SPEC) RECOMMENDED SYNTHETIC GEAR OIL FOR SEVERE DUTY APPLICATIONS †† CHECK OIL WITH LEVEL PLUGS AT 6 O'CLOCK AND 9 O'CLOCK POSITIONS.

7.6

2

1

IF LEAKING REMOVE AND REPAIR FILL WITH SAE 30 OR 40 GREASE WHILE SWINGING *** EVERY 24 HOURS LITHIUM BASE EP2 GREASE GREASE WHILE SWINGING LITHIUM BASE EP2 GREASE LITHIUM BASE EP2 GREASE *REFER TO 250 HOURS SCHEDULED MAINTENANCE FOR DETAILS LITHIUM BASE EP2 GREASE

10 SHOTS

1

10 SHOTS

1

5 SHOTS EACH FITTING PURGE

1

...6 ...12 …12 LITHIUM BASE EP2 GREASE

PURGE ...6 ...8

DOOR AND ROOF HINGES LUB DOOR CYLINDER PINS LUB FELLING ATTACHMENT LITHIUM BASED EP2 GREASE CONTAINING MOLYBDENUM DISULFIDE ** ANTIFREEZE MUST MEET GM 6038M SPECIFICATIONS SEE ENGINE MANUFACTURER'S MAINTENANCE MANUAL

† Use of filters other than genuine Tigercat replacement filters is not recommended.

845BLUBCHART.XLS R3 12/03

3.7

1 SHOT 12 LITHIUM BASE EP2 GREASE LUBRICATE 4 APPLY OIL LIBERALLY SEE MANUFACTURER'S MAINTENANCE SCHEDULE LEGEND: CHK - CHECK DRN - DRAIN D/R - DRAIN AND REFILL LUB - LUBRICATE REP - REPLACE

Tigercat 845B Feller Buncher

Lubrication and Maintenance

APPROVED HYDRAULIC OILS In addition to providing the vehicle with its normal operational functions, hydraulic oil is also used to fill the swing gearbox and brake.

Use one of the following oils to fill or replenish the hydraulic system.

®

Tigercat

HYDRAULIC OIL OPERATING RANGE (Not suitable for axle applications)

OPERATING TEMP. RANGE LOWEST START-UP TEMP.

HYDRAULIC OIL TEMPERATURE -40

OIL TYPE

-40

-30 -20

-20 0

-10

0 20

10 40

20 60

30 80

40

50

60

70

100

120

140

160

80 180

90 200

100

°C 220°F

CITGO MYSTICK HVI 32 MYSTICK HVI 46 MYSTICK HVI 68 CHEVRON RYKON PREMIUM 32 RYKON PREMIUM 46 RYKON PREMIUM 68 ESSO / EXXON UNIVIS N22 UNIVIS N32 UNIVIS N46 UNIVIS N68 IRVING OIL HYDRAULIC LP 22 HYDRAULIC LP 32 HYDRAULIC LP 46 HYDRAULIC LP 68 MOBIL MOBIL DTE 12M (ISO 22) MOBIL DTE 13M (ISO 32) MOBIL DTE 15M (ISO 46) MOBIL DTE 16M (ISO 68) PETRO-CANADA HYDREX MV 22 HYDREX MV 36 HYDREX MV 60 SHELL TELLUS T22 TELLUS T32 TELLUS T46 TELLUS T68 TEXACO RANDO HDZ 22 RANDO HDZ 32 RANDO HDZ 46 RANDO HDZ 68

CAUTION

OPERATING MACHINE OUTSIDE LIMITS SHOWN WILL RESULT IN FAILURE OF HYDRAULIC COMPONENTS

5168AR03

3.8

Tigercat 845B Feller Buncher ER BOOM SYSTEM

Lubrication and Maintenance Before attempting to disconnect hydraulic hoses or perform work on the boom system, ensure that:-

WARNING

STICK CYLINDERS FULLY EXTENDED

This machine may be equipped with an ER boom system. Because of this, it may behave in an unexpected manner compared to a conventional boom system.

• TIP OF STICK BOOM FULLY SUPPORTED

When performing maintenance procedures or setting up a machine equipped with an ER boom system, the following points must be noted:

845B-42

The main and stick boom cylinder circuits are connected hydraulically. Thus, disconnecting a hydraulic line to a boom cylinder may cause either boom to move unexpectedly. The boom may also move unexpectedly if a port relief adjusting screw is unscrewed (counterclockwise) too far and the pressure drops below that which is required to hold the weight of the boom and head. Ensure that the head is resting squarely on a solid footing and the stick cylinders are fully extended, tank pressure is relieved and engine is shut off before disconnecting any hydraulic lines.

ER. BOOM SYSTEM. FIG.1 HOIST CYLINDER FULLY RETRACTED

•

TIP OF STICK BOOM FULLY SUPPORTED 845B-43

ER. BOOM SYSTEM. FIG.2

(a) The machine is parked on level ground with the head sitting flat on the ground. (b) The stick cylinders are fully extended (fig. 1) or the hoist cylinder fully collapsed (fig. 2). (c) The tip of the stick boom supported .

For additional safety precautions refer to ER BOOM SYSTEM PRECAUTIONS in SECTION 1 OF THIS MANUAL. Also note that because of the hydraulic connection between the main boom and ER cylinders, the ER cylinder can overpower the stick cylinders under certain conditions, causing the stick boom to move unexpectedly. This most often occurs when setting the MAIN BOOM UP relief valve, causing the stick to extend, but it may also happen at other times if the relief settings are not correct. Ensure that all personnel and equipment are clear of the boom path and that there is sufficient overhead clearance for the head to rise before making any adjustments.

3.9

Tigercat 845B Feller Buncher LUBRICATION OF SWING DRIVE GEARBOX

Lubrication and Maintenance CHECKING THE AIR CONDITIONING SYSTEM

UPPER GEARING LUBRICATION The swing gearbox upper gearing is lubricated by hydraulic oil which flows from the 'PB' port, one of three return ports on the clamps and wrist valve into the swing brake 'U' port on the swing drive gearbox. A 1/16 inch orifice/connector installed in the 'U' port regulates the flow of oil through the gearbox at approximately 1 GPM. Oil is returned to tank via flushing port 'T'.

Any service work must be performed by a certified A/C technician. The system should be charged with R134a refrigerant only. PAG (polyalkylene glycol) oil should be present in the system and must be used on 'O' rings and fittings during assembly.

A/C SYSTEM TOTAL CAPACITIES PAG OIL R134a REFRIGERANT (polyalkylene glycol)

LOWER BEARING LUBRICATION The cavity in the lower portion of the gearbox where the two lower bearings are housed is completely filled with grease.

3 LBS. 0 OZ.

A/C COMPRESSOR

RECEIVER DRYER

••

LUBE FITTINGS

•

7 OZ.

•

•

•

845B-D33

LUBRICATE GEARBOX LOWER BEARINGS

845B-D43

To gain access to the lube fitting, remove the cover plate directly below the gearbox. Using a hand grease gun, pump 5 shots of grease into each grease fitting. Follow the lubricating procedure on the label located beside the grease fittings and also refer to SCHEDULED MAINTENANCE - 250 HOURS in THIS SECTION. For additional information refer to SECTION 15 in the SERVICE MANUAL.

A/C COMPRESSOR AND RECEIVER DRYER The compressor, charge valves and receiver dryer are accessible through the rear engine compartment door.

Perform following inspection along with 125 HOURS inspection outlined in SCHEDULED MAINTENANCE in THIS SECTION. a. Check re-circulating and fresh air filters in operator's cab. Refer to SECTION 2 of the OPERATOR'S MANUAL.

3.10

Tigercat 845B Feller Buncher

Lubrication and Maintenance d. Check and adjust compressor drive belt tension. e. Check all A/C hoses for kinks.* f.

Run air conditioning system for 3 - 5 minutes.

g. Check air temperature exiting vents in cab.

•

CHECK A/C CONDENSER CORE

h. Listen to compressor and blower motor for abnormal noises.* i.

Check to see that compressor clutch will engage.* SIGHT GLASS INDICATES CONDITION OF CHARGE

•• ••

BINARY SWITCH, SYSTEM PROTECTION

• CHECK A/C CONDENSER CORE 244-15 b. Check the condenser core for dirt and debris.

Clean as required. Refer to CLEANING A/C CONDENSER, OIL COOLER AND RADIATOR in SECTION 2 of the OPERATOR'S MANUAL.

MOISTURE INDICATOR BLUE - OK. PINK - REPLACE DRYER, RECHARGE SYSTEM

•

c. Check for dirt and debris; on the evaporator coil located inside the A/C-heater unit and also the inside of the A/C-heater unit. Clean as required.

A/C RECEIVER/DRYER

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 5 minutes every 2 weeks.

This will circulate oil to all components of the A/C system.

870-D43

j.

A/C RECEIVER/DRYER

Inspect sight glass on receiver dryer with A/C ON. A constant stream of bubbles indicates system requires charging.* Check colour in moisture indicator; BLUE is OK. PINK indicates desiccant material in dryer is saturated with moisture. In this situation replace receiver/dryer, evacuate system and recharge system with both refrigerant and PAG oil.*

CAUTION If using water or compressed air for cleaning, use at 30 psi. or less. Always use personal protective equipment to guard against flying debris.

* Indicates that these repairs must only be carried out by a certified A/C technician.

For additional SERVICE information refer to the Tigercat A/C SERVICE MANUAL part number 18795A, available from Tigercat parts department.

3.11

Tigercat 845B Feller Buncher FILTERS - REMOVE AND REPLACE

Lubrication and Maintenance FUEL FILTER/WATER SEPARATOR

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.

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 CHART in THIS SECTION. FUEL PRIMING BUTTON

IMPORTANT Filters that are an integral part of the engine (fuel and lubricating oil) should be serviced and replaced according to the engine manufacturer's operation and maintenance manual.

1" GASKET & ELEMENT OUTER GASKET

WATER SEPARATOR BOWL

• WATER BOWL GASKET

• 216-8A 399-2A

ENGINE FUEL FILTER

DRAIN TAP

CHECK FUEL LINE WATER SEPARATOR

Changing the filter: 1. Park machine on level ground with felling head resting on the ground.

2. Open engine enclosure doors fully and install roof safety strut.

3. Stop engine. Turn battery disconnect switch to the OFF position.

4. Wipe clean the area around the filter and head.

5. Place a suitable container below to catch the spilt of fuel.

399-9A

ENGINE OIL FILTER

3.12

Tigercat 845B Feller Buncher

Lubrication and Maintenance SHUT-OFF VALVE IN OPEN POSITION

••

•

STRAINER INSIDE FUEL TANK

FUEL TANK SHUT-OFF VALVE 6. Wearing face protection (in case of a fuel squirt) turn OFF the fuel shut-off valve and unscrew the old filter. The fuel shut-off valve is located on the right side fuel tank suction line located at the base of the tank.

73-12

7. Remove and discard the small 1” I.D. gasket from the threaded extension on the filter head.

845B-D36 FUEL TANK STRAINER, R.H. 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 machine on level ground with felling head resting on the ground.

8. Remove the water sediment bowl from the bottom of the old filter. Discard this gasket also. Dispose of old filter and any fuel properly.

2. Stop engine. Turn battery disconnect switch to the OFF position.

9. Clean the water sediment bowl.

3. Open rear engine enclosure doors and lower steps.

10. Check the seating area for the gaskets on the filter head and the water sediment bowl and wipe clean.

4. Drain the fuel tanks using drain plugs in bottom of each tank, accessible from underside of upper frame.

11. Lubricate gasket for bottom of filter and water sediment bowl with clean engine oil and carefully hand tighten the water sediment bowl onto the new filter. It is plastic and will break if over tightened. Close the water drain valve.

5. Remove battery box cover.

•

•• ••

12. Lubricate the new 1” I.D. gasket with clean engine oil and install onto the threaded extension on the filter head.

L.H. SIDE COVER

13. Lubricate the gasket on top of the new filter with clean engine oil and prefill the filter with clean fuel.

BATTERY BOX COVER

R.H. SIDE COVER

• 845B-D37

14. Screw the new filter on to the filter head until the gasket makes contact with the seat and then hand tighten an additional 3/4 turn only.

TANK CONNECTION HOSE

FUEL TANK CLEANOUT COVERS

WARNING While working in this area, do not leave fuel or oil soaked rags laying around. Accidental arcing of battery cables can cause a fires.

15. Turn the fuel shut-off valve ON, prime fuel system with push button primer pump located on the fuel filter mounting head, start the engine and check for leaks.

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 R.H. fuel tank.

6. Remove the round fuel tank cleanout cover plate and “O” ring from each access hole. Note that the fuel strainer is located just inside the R.H. cleanout cover.

7. Before removing the strainer, clean any debris from the bottom of the tank(s) and wipe it clean.

3.13

Tigercat 845B Feller Buncher

Lubrication and Maintenance

8. Remove the fuel strainer using the hex on the end of strainer. Carefully clean the strainer (rough handling can cause damage).

HYDRAULIC FILTER SERVICING GUIDELINES

9. Check for a buildup of foreign materials where the strainer threads on to the pipe and elbow.

IMPORTANT

NEVER PRE-FILL ANY HYDRAULIC FILTERS ON 800 SERIES MACHINES

10. Reinstall the strainer using the hex on end.

11. Reinstall fuel tank cover plate with “O” ring.

12. Install battery box cover.

Tigercat generally 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 prefiltered before use.

13. Refuel and check for leaks.

14. Turn battery disconnect switch ON and start the engine, check for leaks again.

3.14

Tigercat 845B Feller Buncher

Lubrication and Maintenance

HYDRAULIC HIGH PRESSURE PILOT FILTER There is a hydraulic high pressure pilot filter placed ahead of the pilot supply valve to filter the hydraulic oil supply from the main Linde valve before it enters the pilot system.

element may need to be changed. Refer also to SECTION 5 of the SERVICE MANUAL for more information.

For service and replacement intervals see SERVICE AND LUBRICATION CHART in THIS SECTION. Changing the filter:

CLOG INDICATOR SIGHT GLASS

••

1. Park machine on level ground with felling head resting on the ground and stop engine.

2. Turn BATTERY DISCONNECT SWITCH to ‘OFF’ position.

3. Release air from the hydraulic tank by opening the AIR VENT VALVE. 4.

A small pressure accumulator is used in the pilot supply circuit to ensure an adequate supply of pilot control oil under all operating conditions. The accumulator will normally bleed down the pilot supply oil to zero PSI in under 30 seconds after engine shut down, but install a 0 to 1000 PSI gauge on the pilot supply circuit test port to be sure no pressure is present before unscrewing the filter bowl.

5. Wipe clean the area around the filter and head.

6. Place rags below to catch any spilt oil.

221-15A

HIGH PRESSURE PILOT FILTER

This filter incorporates a clog indicator. The clog indicator consists of a clear plastic sight glass mounted on top of the filter housing. Under normal operating conditions (or when the hydraulic system is shut down) the indicator will show GREEN. When a pressure differential of 72 psi builds up inside the filter, the indicator will show RED, indicating a clogged filter.

This condition could happen during cold start-ups, but as the oil warms up the indicator will automatically re-set to GREEN. The indicator will not remain in the “clogged” (RED) position when the pilot system is not being used. “Clogged” condition will result in low pilot pressure. If a loss of controls or slow response occurs, filter

7. Wearing face protection (in case of an oil spray), unscrew the filter bowl from the filter head. Remove the filter element and dispose of it properly. Clean out the filter bowl before reusing it.

8. Remove and discard the small o-ring from between the filter element and the filter head.

9. Check the seating area for o-rings and seals on the filter bowl and filter head. Wipe clean.

10. DO NOT pre-fill the filter*. Lubricate any new o-rings and seals with clean hydraulic and install the new filter element.

11. Close air vent ball valve. *Refer to HYDRAULIC FILTER SERVICING GUIDELINES on PREVIOUS PAGE.

IMPORTANT Contaminated hydraulic fluid 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 could lead to severe wear and rapid failure of hydraulic system components.

3.15

Tigercat 845B Feller Buncher

Lubrication and Maintenance

HYDRAULIC OIL CASE DRAIN AND PRE-FILL FILTER

Changing the filter element: 1. Park machine on level ground with felling head resting on the ground. Stop engine. The prefill filter is accessed through the right hand engine door.

2. Wipe clean the area around the filter element and head.

3. Place rags below to catch the spillage of oil.

4. Wearing face protection (in case of an oil spray), unscrew the old filter. Dispose of old filter and any oil properly.

HYDRAULIC HAND FILL PUMP

6. The new Tigercat filter element 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.

•

HYDRAULIC PRE-FILL OIL FILTER

••

OIL FILL SHUT-OFF VALVE

•

•

FILTER HEAD

• GASKET

• 845B-D24

HYDRAULIC OIL PRE-FILL FILTER

FILTER ELEMENT

SQUARE SECTION GASKET INSTALLATION

There is a hydraulic oil pre-fill filter installed in the fill line to filter new oil prior to entering the hydraulic tank.

HYDRAULIC CASE DRAIN FILTER

••

FILTR_SEALS 2

SQUARE SECTION GASKET Remove used gasket and clean groove in head.

Apply clean oil to new gasket surfaces.

Install new gasket into groove in filter head.

Do not prefill filter *. Screw on new filter until gasket makes contact with filter head.

Tighten filter an additional 3/4 turn.

DO NOT use bottom nut for filter installation or damage/leakage may result. Bottom nut is to assist in filter removal only.

HYDRAULIC OIL CASE DRAIN FILTER

FILTER HEAD

• •

396-22

GASKET

A case drain filter is installed in the return line from the case drain connection on the saw pump, this filter protects against contaminated oil entering the hydraulic system should the dedicated saw circuit develope a malfunction.

• FILTR_SEALS 2

For service and replacement intervals see SERVICE AND LUBRICATION CHART in THIS SECTION.

FILTER ELEMENT

'O' RING GASKET INSTALLATION

'O' RING GASKET Remove used gasket and clean gasket seat in head.

Apply clean oil to new gasket surfaces.

3.16

Tigercat 845B Feller Buncher Install new gasket on inside lip of filter.

Do not prefill filter *. Screw on new filter until gasket makes contact with filter head.

Tighten filter an additional 3/4 turn.

Tighten filter until top edge makes metal to metal contact with filter head. (approximately 1 1/2 additional turns after gasket contact) DO NOT use bottom nut for filter installation or damage/leakage may result. Bottom nut is to assist in filter removal only.

7. Start the engine and check for leaks. *Refer to HYDRAULIC FILTER SERVICING GUIDELINES on PREVIOUS PAGE.

HYDRAULIC OIL IN-TANK RETURN FILTERS Refer to Illustration 845B-27.

There are two replaceable mesh filters housed in the filter box of the hydraulic tank. The filter box is a sealed compartment within the hydraulic tank.

The filters should be checked/changed at the intervals specified in the LUBRICATION AND MAINTENANCE SCHEDULE in SECTION 3 of THIS MANUAL.

Lubrication and Maintenance 2. Position upper frame so as to allow access to hydraulic tank drain plug.

3. Turn BATTERY DISCONNECT SWITCH to 'OFF' position.

4. Release air from tank by opening air vent ball valve.

5. Loosen and slowly disconnect one of the air bleed hoses from the top of one of the filter covers to allow oil in filter box to drain into lower part of tank.

6. Disconnect and remove both hoses from filter covers.

7. Remove filter covers and filter bypass valves.

8. Drain oil from tank until top of return tubes are visible in bottom of filter box. See illustration 845B-27.

9. Change filters, reinstall bypass valves, retaining springs and covers. Use a NEW 'O' ring to seal filter cover if 'O' ring has hardened or sustained damage. Reconnect air bleed hoses.

10. Close air vent valve.

11. On earlier machines with turbo air tank pressurizing system: Pressurize tank to 3 psi using hand fill pump: Remove plug from end of fill hose and operate hand pump until a gauge reading of 3 psi is obtained. Loosen one of the air bleed hoses to allow air to escape from the filter box. Tighten air bleed hose and continue to pressurize tank.

Repeat until clean, air-free oil emerges from air bleed hose. Replace plug on fill hose. Once engine is running, pressure in tank will be maintained by turbo air from the engine.

MESH FILTER 2ND. MESH FILTER BELOW COVER PLATE

••

AIR BLEED HOSE

•

11. On later machines with compressor pressurizing system:

••

Pressurize tank by turning the key switch to RUN position, PRESS and HOLD the tank pressurization switch in the cab in the ON position until a pressure reading of 6 psi. is indicated on the hydraulic tank pressure gauge. Loosen one of the air bleed hoses to allow air to escape from the filter box. Repeat until clean, air-free oil emerges from air bleed hose.

RETURN FILTERS ~ HYDRAULIC OIL If the FILTER BYPASS warning light in the cab comes ON between the scheduled maintenance intervals, Stop the machine and check/change these filter elements.

145-23AX

It should also be noted that this light could come ON at start up due to cold weather conditions. In this case refer to MACHINE PREPARATION, SYSTEM TEST AND WARM UP in SECTION 2 of the OPERATOR'S MANUAL.

12. Add hydraulic oil up to FULL mark on tank sight gauge using hand fill pump.

NOTE: Changing filters tends to aerate the hydraulic 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.

CHANGING HYDRAULIC OIL FILTERS 1. Park machine on level ground with felling head resting on ground.

3.17

Tigercat 845B Feller Buncher

Lubrication and Maintenance •

AIR BLEED CONNECTION

•

•

FILTER COVER

•

'O' RING

BYPASS VALVE

FILTER

•

SIGHT FILTER BOX GAUGE

FILTER BOX

10 PSI. VENT/FILTER

BALL VALVE, AIR VENT

•

• •

•

PRESS. GAUGE, HYD. TANK AIR REGULATOR

• AIR BLEED HOSE

•

•

•

FROM SAW PUMP CASE DRAIN

•

•

STRAINER COVER WITH 'O' RING SEAL

• •

AIR COMPRESSOR (LATER MACHINES)

845B-27

SUCTION TUBES

• •

• FROM HAND FILL PUMP

CROSS SECTION 'A' 'A' OIL HEATER (OPTIONAL)

•

•

•

OIL LEVEL SENDERS

•

RETURN TUBES

•

TURBO AIR FROM ENGINE (EARLIER MACHINES)

DRAIN TANK TO BELOW THIS LEVEL TO PREVENT CONTAMINATED OIL FROM FLOWING INTO RETURN TUBES

• DRAIN PLUG

SUCTION STRAINERS

HYDRAULIC TANK

CHANGING HYDRAULIC OIL STRAINERS There are two reusable strainers housed in the hydraulic tank on the ends of each return tube. The strainers should be inspected whenever the hydraulic tank is drained. See SCHEDULED MAINTENANCE in THIS SECTION. For service and replacement intervals see SERVICE AND LUBRICATION CHART in THIS SECTION.

CHANGING OR CLEANING THE STRAINER: This should be performed in the event of a pump failure or hydraulic oil contamination.

1. Park machine on level ground with felling head resting on ground.

2. Position upper frame so as to allow access to hydraulic tank drain plug.

3. Stop engine.

4. Open engine enclosure doors and install roof safety strut.

5.

3.18

Turn BATTERY DISCONNECT SWITCH to 'OFF' position.

Tigercat 845B Feller Buncher 6. Release air from tank by opening air vent ball valve.

Lubrication and Maintenance 20. On earlier machines with turbo air tank pressurizing system:

7. Remove drain plug and completely drain oil from hydraulic tank.

Continue to operate hand pump until a gauge reading of 3 psi is obtained. Loosen one of the air bleed hoses to allow air to escape from the filter box. Tighten air bleed hose and continue to pressurize tank. Repeat until clean, air-free oil emerges from air bleed hose. Replace plug on fill hose. Once engine is running, pressure in tank will be maintained by turbo air from the engine.

8. Disconnect wire to temperature sender on strainer cover.

9. Unclamp and remove both hoses from strainer cover to pumps. Ensure maximum cleanliness when disassembling and reassembling.

10. Remove bolts from strainer cover and carefully remove cover from tank. Note orientation of cover for reinstallation.

20. On later machines with compressor pressurizing system:

11. Remove oil strainers from strainer cover. Note this may require heating the fittings to break the Loctite seal.

Continue to operate hand pump until a gauge reading of 2 to 3 psi. is obtained. Loosen one of the air bleed hoses to allow air to escape from the filter box. Tighten air bleed hose and continue to pressurize tank by turning the key switch to RUN position and pressing and holding the tank pressurization switch in the cab in the ON position until a pressure reading of 6 psi. is indicated on the hydraulic tank pressure gauge. Again loosen one of the air bleed hoses to allow air to escape from the filter box. Repeat until clean, air-free oil emerges from air bleed hose. Replace plug on fill hose.

12. Thoroughly clean strainers and reinstall or where necessary replace with new ones.

13. Install NEW O-ring for cover in groove in hydraulic tank. Carefully insert strainers into hydraulic tank and bolt cover in place.

14. Replace pump suction hoses on strainer cover and tighten clamps. Reconnect wire to temperature sender.

15. Add hydraulic oil to tank using hand fill pump.

16. Bleed air from the main pump and the saw pump by removing the case drain hoses at the pump connections. Install plugs in hose ends.

17. Continue filling hydraulic tank using hand fill pump. Reconnect both case drain hoses to pumps after oil is seen coming from the pump case drain ports. It is important that all air is evacuated from the pumps.

21. Recheck oil level and add hydraulic oil up to FULL mark using hand fill pump.

NOTE: Changing strainers and filters and replacing the hydraulic oil tends to aerate the oil.

For maximum pump life, the machine should sit for 1 hour after servicing to allow entrained air to escape from the oil prior to applying working pressures to the pumps.

18. Fill hydraulic tank up to full mark on sight gauge using hand fill pump 19. Close air vent ball valve.

3.19

Tigercat 845B Feller Buncher AIR INTAKE MAINTENANCE

Lubrication and Maintenance ENGINE AIR CLEANER

PRECLEANER

ENGINE AIR PRECLEANER

••

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 check periodically to make sure that foreign materials have not plugged the intake area or the discharge ports area and that the rotor spins freely.

AS THE AIR SPINS, CENTRIFUGAL FORCE SEPARATES FOREIGN MATERIALS FROM THE CLEAN AIR

•• AIR CLEANER UNLOADER VALVE

244-13

•• AIR CLEANER

CONTAMINANTS ARE BLOWN OUT OF SPECIAL DISCHARGE PORTS BY HIGH VELOCITY, AIR POWERED ROTOR

• • • 205-19AB

•

THE PRECLEANER HAS SPECIALLY DESIGNED BLADES THAT CAUSE THE INCOMING AIR TO SPIN TURBO 2

AIR CLEANER PRIMARY ELEMENT

ONLY THE PURIFIED AIR GOES TO THE AIR FILTER

PRECLEANER OPERATION

205-22AB

DISCHARGE PORT AREA

AIR CLEANER SAFETY ELEMENT

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

AIR CLEANER UNLOADER VALVE This rubber valve on the tube of the air cleaner housing should be checked before every shift (8 hrs). If this valve is missing, damaged or has turned hard, it will cause the air cleaner to become ineffective. The valve should be replaced every 1000 Hours.

218-21B

PRECLEANER

AIR CLEANER The air cleaner on this machine uses 2 filter elements, a primary element and a safety element accessible through the rear door.

Remove the unloader valve from the tube of the air cleaner housing. A good valve is soft and flexible.

Check and clean the valve. If it was plugged, then check the filter elements as they may need to be replaced as well. Reattach the valve to the tube.

The valve should suck closed at about 1/3 of full 3.20

Tigercat 845B Feller Buncher

Lubrication and Maintenance

••

RUBBER ELBOWS AND BAND CLAMPS

UNLOADER VALVE

217-2

AIR CLEANER UNLOADER VALVE

•

throttle. When operating in high dust conditions this valve should be checked and squeezed frequently to release dust buildup.

INTAKE TUBING AND JOINTS 245-3 INTAKE TUBING AND JOINTS Replace turbocharger rubber inlet elbow and coupling - High temperatures in this area can cause the rubber to harden.

Check ALL air intake tubing, rubber couplings and band clamps for signs of wear and leakage.

Continued on page 22

845B-D01

FILTER RESTRICTION INDICATOR

FILTER RESTRICTION INDICATOR A filter restriction indicator is connected to the outlet side of the air filter. Service to the air filter is required when the indicator shows RED. This indicator provides a continuous reading whether the engine is running or is shut down. After servicing the filter, reset the indicator by pressing down on the reset button.

3.21

Tigercat 845B Feller Buncher

Lubrication and Maintenance

Continued from page 21

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.

In addition to the LUBRICATION AND MAINTENANCE SCHEDULE in section 3 of this manual, please note the following: The most common and damaging servicing problems are:

6. Inspect the new filter for damage.

OVER SERVICING AIR CLEANER Filter elements increase in dust cleaning efficiency as dust builds up on the media. Looks can be deceiving. A filter that looks dirty is actually more efficient than one that is clean. A filter with dust build up on the media reaches nearly 100% dust cleaning efficiency. Only when a filter is so clogged with dirt that air restriction goes beyond engine manufacturer's guidelines, should a filter be replaced.

NOTE: This does not apply to 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 is removed for replacement. The safety element reduces this risk but it should also be replaced at every third primary element change.

IMPORTANT STEPS TO FOLLOW WHEN CHANGING FILTER ELEMENTS 1. Release the cover latch gently to reduce the amount of dust dislodged.

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.

4. Always clean the inside of the outlet tube.

5. Check your old filter. It can help you detect foreign material on the sealing surface that is causing leakage.

3.22

7. Insert new filter properly. Apply pressure to the outer rim of the filter not the flexible centre.

8. Check connections and ducts for air tight fit. Ensure that all clamps, bolts and connections are in the correct location and tight. Check rubber elbows for damage.

Leaks in these locations send dust directly to the engine.

Tigercat 845B Feller Buncher

Lubrication and Maintenance

3.23

Tigercat 845B Feller Buncher

Lubrication and Maintenance

TORQUE CHART LOCATION

THREAD DIAMETER

Cylinder, Hoist (6336B) Piston nut Cylinder end cap bolts Cylinder, Hoist (9520B) Piston nut Cylinder end cap bolts Cylinder, Stick and Tilt (2788B) Piston nut Cylinder end cap bolts Cylinder, Stick and Tilt (6338B) Piston nut Cylinder end cap bolts Cylinder, Tilt Link (2326B) Piston nut Cylinder end cap bolts Cylinder, Tilt Link (6337B) Piston nut Cylinder end cap bolts Boom joint pin bolts Cab securing bolts Swing bearing Swing bearing bolts Swing gearbox mounting bolts Engine mounting - Cummins 'C' Engine Bolts, bracket/mount to chassis Bolts, bracket to engine, front Bolts, bracket to engine, rear Pump drive Drive plate to flywheel Bell housing to engine Undercarriage Track shoe bolts Roller mounting bolts Sprocket bolts Gearbox mounting bolts Drive motor mounting bolts

TORQUE (LUBRICATED) lbf-ft Nm

-

5430 700

7360 950

M70 M18

6970 270

9460 367

-

3140 410

4260 558

M52 M14

4160 126

5640 171

-

4470 410

6060 560

M62 M16 3/4" UNC 1" UNC

3525 200 282-310 682-750

4780 267 393-420 925-1015

7/8" UNC 5/8" UNC

450-500 160-175

620-680 215-235

7/8" UNC 7/16" UNC M12

450-500 52-57 80

620-680 71-77 109

3/8" UNC M10

33-36 47

45-49 63

3/4" UNF T/T* T/T* 7/8" UNC 450 610 M20 380 515 M20 380 515 M12 95 130 M20 380 515 845BTORQUECHART.XLS *T/T represents Torque-turn, this is a method of torquing the track shoe bolts which is fully described in SECTION 11 of the Tigercat SERVICE MANUAL. Torque values pertaining to the engine and attachment are provided in the appropriate manuals.

3.24

Tigercat 845B Feller Buncher

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 COARSE THREADS 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 THREADS 1/4" - 28 5/16" - 24 3/8" - 24 7/16" - 20 1/2" - 20 9/16" - 18 5/8" - 18 3/4" - 16 7/8" - 14 1" - 12 1 1/8" - 12 1 1/4" - 12

DRY lbf-ft Nm 11 - 12 15 - 16 20 - 28 27 - 38 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

LUBRICATED lbf-ft Nm 8 - 10 11 - 13 26 - 30 35 - 40 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

COARSE DRY THREADS lbf-ft Nm 1/4" - 20 7- 8 10 - 11 5/16" - 18 14 - 18 19 - 24 3/8" - 16 31 - 34 42 - 46 7/16" - 14 49 - 54 66 - 73 1/2" - 13 75 - 83 102 - 112 9/16" - 12 109 - 120 148 - 162 5/8" - 11 150 - 165 204 - 223 3/4" - 10 266 - 293 360 - 397 7/8" - 9 394 - 433 535 - 586 1" - 8 591 - 649 802 - 879 1 1/8" - 7 794 - 873 1077 - 1183 1 1/4" - 7 1120 - 1232 1519 - 1670 FINE DRY THREADS lbf-ft Nm 1/4" - 28 9 - 10 12 - 13 5/16" - 24 17 - 22 23 - 29 3/8" - 24 35 - 39 48 - 53 7/16" - 20 55 - 61 75 - 83 1/2" - 20 85 - 94 116 - 127 9/16" - 18 121 - 133 164 - 180 5/8" - 18 170 - 187 231 - 253 3/4" - 16 297 - 327 403 - 443 7/8" - 14 434 - 477 589 - 646 1" - 12 646 - 711 876 - 965 1 1/8" - 12 891 - 980 1208 - 1328 1 1/4" - 12 1240 - 1364 1682 - 1849

LUBRICATED lbf-ft Nm 8 - 10 11 - 13 10 - 15 13 - 20 23 - 25 31 - 34 37 - 41 50 - 55 57 - 63 77 - 85 82 - 90 111 - 122 113 - 124 152 - 168 200 - 220 271 - 298 296 - 326 402 - 441 443 - 489 601 - 663 596 - 656 808 - 889 840 - 924 1139 - 1252 LUBRICATED lbf-ft Nm 9 - 10 12 - 13 16 - 20 21 - 27 26 - 29 35 - 39 41 - 45 56 - 61 64 - 70 87 - 95 91 - 100 124 - 135 128 - 141 174 - 191 223 - 245 303 - 332 326 - 359 442 - 486 484 - 534 657 - 724 668 - 735 906 - 996 931 - 1024 1262 - 1387

METRIC

SIZE

CLASS 4.8 LUBRICATED DRY Nm lbf-ft Nm lbf-ft

CLASS 8.8 OR 9.9 LUBRICATED DRY Nm lbf-ft Nm lbf-ft

M6 M8 M10

4.8 12 23

3.5 8.5 17

6 15 29

4.5 11 21

9 22 43

6.5 16 32

11 28 55

8.5 20 40

13 32 63

9.5 24 47

17 40 80

12 30 60

15 37 75

11.5 28 55

19 47 95

14.5 35 70

M12 M14 M16

40 63 100

29 47 73

50 80 125

37 60 92

75 120 190

55 88 140

95 150 240

70 110 175

110 175 275

80 130 200

140 225 350

105 165 225

130 205 320

95 150 240

165 260 400

120 190 300

M18 M20 M22

135 190 260

100 140 190

175 240 330

125 180 250

260 375 510

195 275 375

330 475 650

250 350 475

375 530 725

275 400 540

475 675 925

350 500 675

440 625 850

325 460 625

560 800 1075

410 580 800

M24 M27 M30

330 490 675

250 360 490

425 625 850

310 450 625

650 950 1300

475 700 950

825 1200 1650

600 875 1200

925 1350 1850

675 100 1350

1150 1700 2300

850 1250 1700

1075 1600 2150

800 1150 1600

1350 2000 2700

1000 1500 2000

M33 M36

900 1150

675 850

1150 1450

850 1075

1750 2250

1300 1650

2200 2850

1650 2100

2500 3200

1850 2350

3150 4050

2350 3000

2900 3750

2150 2750

3700 4750

2750 3500

ISSUE 3 800

3.25

CLASS 10.9 LUBRICATED DRY Nm lbf-ft Nm lbf-ft

CLASS 12.9 LUBRICATED DRY Nm lbf-ft Nm lbf-ft

Tigercat 845B Feller Buncher

Lubrication and Maintenance

3.26

Tigercat 845B Feller Buncher

SECTION 4 - HYDRAULIC SYSTEM DECEMBER 2003

CONTENTS - SECTION 4 HIGH PRESSURE LIMITING CONTROL VALVE SET LOAD SENSE RELIEF VALVE ..................................................................... 4.26

HYDRAULIC OIL RESERVOIR PRESSURE REGULATOR SET-UP PROCEDURE ............................................... 4.6

HYDRAULIC OIL TANK DESCRIPTION ........................................................................................................ 4.4

HYDRAULIC PUMPS MAIN PUMP ............................................................................................................. 4.8 MAIN PUMP CONTROL VALVE ........................................................................ 4.25 MAIN PUMP WEAR TEST .................................................................................. 4.9 PUMP ASSEMBLY .................................................................................................. 4.8 SAW PUMP ............................................................................................................. 4.9 WRIST AND CLAMPS PUMP ................................................................................. 4.9

HYDRAULIC SYSTEM OPERATION BOOM CYLINDERS ................................................................................................ 4.2 CLAMP ARMS AND WRIST CIRCUIT .................................................................... 4.3 FILTER/STRAINER SERVICE ................................................................................ 4.5 MAIN CIRCUIT DESCRIPTION ............................................................................ 4.14 FLOW ON DEMAND AND LOAD COMPENSATION ........................................ 4.14 MAIN HYDRAULIC CIRCUIT ................................................................................ 4.14 MAIN HYDRAULIC SYSTEM .................................................................................. 4.2 MARGIN PRESSURE .............................................................................................. 4.9 OIL COOLER BY-PASS VALVE ........................................................................... 4.14 PILOT CIRCUIT ....................................................................................................... 4.3 SAW CIRCUIT ......................................................................................................... 4.3 SWING SYSTEM ..................................................................................................... 4.2 TRACK DRIVE SYSTEM ......................................................................................... 4.2 WRIST AND CLAMP ARMS CIRCUIT .................................................................... 4.3

LOAD SENSING BASIC DESCRIPTION CLOSED CENTRE SYSTEM ............................................................................ 4.12 OPEN CENTRE SYSTEM .................................................................................. 4.11 BASIC PRINCIPALS ............................................................................................. 4.10 MARGIN PRESSURE .............................................................................................. 4.9 MARGIN PRESSURE, SET .................................................................................. 4.25 OPERATING TIPS WITH LOAD SENSING .......................................................... 4.13 SET LOAD SENSE RELIEF VALVE ..................................................................... 4.26 SET MARGIN PRESSURE .................................................................................... 4.25

MAIN CONTROL VALVE/MANIFOLD BOOM FUNCTIONS SPOOL SECTIONS .............................................................

CONTROL VALVE SECTIONS .............................................................................

CONTROL VALVE SPOOL OPERATION .............................................................

DESCRIPTION ......................................................................................................

DRIVE MOTOR SPOOL SECTIONS ....................................................................

HIGH PRESSURE LIMITING CONTROL VALVE .................................................

PORT RELIEF AND ANTICAVITATION VALVE ...................................................

ADJUSTING PROCEDURE ..............................................................................

4.16 4.16 4.19 4.16 4.16 4.24 4.18 4.18

PRESSURE SETTINGS “STANDARD” SETTINGS LESS ATTACHMENT HEAD ...................................... 4.29 WITH H845B LOGMAX ATTACHMENT ............................................................... 4.28 WITH TIGERCAT DISC SAW FELLING HEAD .................................................... 4.27

SCHEMATIC DIAGRAMS LOAD SENSING (FLOW ON DEMAND) .............................................................. 4.10 LOAD SENSING SYSTEM CIRCUIT DIAGRAM .................................................. 4.15 MAIN PUMP SCHEMATIC ...................................................................................... 4.8 MAIN VALVE WITH HIGH PRESS. LIMITING CONTROL ................................... 4.16

SEE ALSO SECTION 3

Tigercat 845B Feller Buncher

Hydraulic system

HYDRAULIC SYSTEM OPERATION

A return line connecting the 'PB' port on the saw/wrist/clamps valve to the 'T3' port on the main Linde valve, maintains a supply of oil in the 'T' tank passages of the main Linde valve base manifold. This provides a back pressure in these passages and reduces the possibility of cavitation in the components of the load sensing system. A check valve is installed in the fitting at the 'T3' port to prevent tank oil from flowing in the reverse direction.

The hydraulic system has four basic circuits; 1. Variable-displacement main hydraulic circuit with load sensing for the boom, stick, tilt, swing and track functions.

2. Variable-displacement circuit for the saw.

3. Fixed-displacement circuit for the clamp arms and wrist.

4. Closed-centre pilot circuit to supply oil to the pilot system.

Boom cylinders The boom hydraulic circuits are incorporated in the main hydraulic load sensing system. All hoist, stick and tilt cylinders including ER boom cylinders have cushions at both ends.

All cylinder rods are ground, heat treated, chrome plated and polished.

1. THE MAIN HYDRAULIC SYSTEM This a closed centre system utilizing a variable-displacement axial-piston pump with load sensing and horsepower limiting control.

The load sensing system ensures that the pump will deliver only the amount of oil that is required by an individual function or combination of functions.

Swing system The swing hydraulic circuit is incorporated in the main hydraulic load sensing system. It utilizes a bent-axis piston motor incorporating two crossover relief valves. The motor is connected to a dual, double reduction planetary gearbox which provides variable swing speeds of 6 - 7 rpm. A rotary manifold facilitates the hydraulic connection to the undercarriage of the vehicle and permits continuous 360 degree swing. The swing drive gearbox incorporates a wet, multi-disc brake installed between the motor and gearbox. The swing brake is controlled by a switch on the instrument panel. The brake is spring-apply, hydraulic-release and will automatically apply whenever the pilot oil supply is shut off. For detailed description of the SWING system, refer to SECTION 15 of THIS MANUAL.

This feature improves fuel economy and reduces heat generation as compared to other types of hydrostatic systems. Energy is not wasted by producing unnecessary pump flow for systems that don't require it. Refer to LOAD SENSING in THIS SECTION. The horsepower limiting control ensures that the engine will not lug down below the full load rpm (engine anti-stall set point) by signalling the main pump to de-stroke. This reduces the output from the main hydraulic pump to lighten the load on the engine. Refer to ENGINE ANTI-STALL in SECTION 9 of this manual.

The main control valves associated with this system are pressure and flow compensated to provide independent and load independent operation for all functions. The control valves are mounted on a common supply/return base manifold. Two 'P' (pressure) ports on the back of the manifold receive supply oil from the main pump. The return oil from the main control valves exits the base manifold at two 'T' ports and 75 psi internal check valves.

From there on earlier machines the oil is returned directly to tank. On later machines, the oil is directed to the hydraulic tank via the oil cooler.

Track drive system The track drive hydraulic circuit is incorporated in the main hydraulic load sensing system and utilizes high-torque, axial-piston hydraulic motors. The motors are mounted to a three stage planetary drive gearbox and each is completely housed within the width of the track shoes. The gearboxes include wet, multiple-disc, springapply, hydraulic-release brakes which automatically release when driving and apply when stationary. Independent control of each track permits counter rotation. For a detailed description of the TRACK DRIVE SYSTEM, refer to SECTION 11 of THIS MANUAL.

4.2

Tigercat 845B Feller Buncher

Hydraulic system 4. PILOT CIRCUIT

2. SAW CIRCUIT

The closed centre pilot circuit receives oil from the main hydraulic system (main pump).

The supply of pilot oil originates at a 'P' port on the base manifold of the main control valves, the pilot oil passes through a "high pressure" filter to the pilot supply valve (pressure reducing/relieving valve) which maintains the pilot pressure at 425 psi. From there, pilot oil (425 psi) is supplied to the 'P1' port on the anti-stall valve attached to the main pump and also the IN port of the pilot manifold. The pilot manifold distributes pilot pressure oil to all of the pilot controlled hydraulic circuits throughout the machine. A pilot shut-off solenoid valve cartridge located at the IN port on the pilot manifold will shut down or deactivate the pilot system whenever the left armrest is in the raised position.

This open centre circuit uses a variabledisplacement pressure-compensated piston pump which delivers oil to the variabledisplacement bent-axis piston motor to drive the saw. The saw control valve is pilot operated and controls the flow of hydraulic oil from the saw pump to the saw motor. This control valve is bolted to the clamps and wrist control valve but operates independently except for sharing the tank return ports on a common outlet section. To protect the saw circuit a relief valve is installed in the inlet section of the saw control valve.

A solenoid operated saw pilot valve controls the flow of pilot oil to the end of the spool in the main control valve.

The saw switch on the control panel in the cab is used to turn the saw ON or OFF.

For a full description of the pilot manifold and the pilot circuit, refer to SECTION 5 in THIS MANUAL.

Refer to SAW DRIVE description in SECTION 17 of this manual.

3. CLAMP ARMS AND WRIST CIRCUIT This is an open-centre circuit with a fixed displacement gear pump (vane pump on earlier machines) and a three-section spool valve. The spool valve also includes an inlet (mid) section and an outlet section. The gear pump provides a continuous supply of oil to the clamps/accumulating/wrist control valve which will divert the oil back to tank if neither of the clamps, accum. or wrist functions are in use. The return oil from this open centre circuit is returned to tank via the oil cooler on earlier machines or directly to tank on later machines. The return oil is filtered by in-tank return filters. Refer to TREE CLAMPS AND WRIST description in SECTION 18 of this manual.

4.3

Tigercat 845B Feller Buncher

Hydraulic system •

AIR BLEED CONNECTION

•

•

FILTER COVER

•

'O' RING

BYPASS VALVE

FILTER

•

SIGHT FILTER BOX GAUGE

FILTER BOX

10 PSI. VENT/FILTER

BALL VALVE, AIR VENT

•

• •

•

PRESS. GAUGE, HYD. TANK AIR REGULATOR

• AIR BLEED HOSE

•

•

•

FROM SAW PUMP CASE DRAIN

•

•

STRAINER COVER WITH 'O' RING SEAL

• •

AIR COMPRESSOR (LATER MACHINES) TURBO AIR FROM ENGINE (EARLIER MACHINES)

FROM HAND FILL PUMP

• • • DRAIN PLUG

SUCTION STRAINERS

HYDRAULIC OIL TANK

SUCTION TUBES

•

CROSS SECTION 'A' 'A'

845B-27

•

•

•

OIL LEVEL SENDERS

•

RETURN TUBES

•

OIL HEATER (OPTIONAL)

DRAIN TANK TO BELOW THIS LEVEL TO PREVENT CONTAMINATED OIL FROM FLOWING INTO RETURN TUBES

HYDRAULIC TANK The tank is pressurized during operation:

Also refer to SECTION 2 of the OPERATOR'S MANUAL for additional information.

On earlier machines utilizing turbocharger air from the engine and regulated to 3 psi. by a regulator.

Located at the right of the machine, the hydraulic tank has a capacity of 45 U.S. gallons (170 litres).

The tank has two compartments; a filter box and a tank. The filter box, which is a sealed compartment within the tank, collects, filters and strains all the hydraulic oil as it returns back to the tank.

On later machine by an air compressor controlled by the hydraulic tank pressurization switch on the control panel. Refer to HYDRAULIC TANK PRESSURIZATION SYSTEM, LATER MACHINES in SECTION 2 of the OPERATOR'S MANUAL for additional information.

4.4

Tigercat 845B Feller Buncher

Hydraulic system

SERVICE NOTE: Before disconnecting any hoses, release the pressure in the hydraulic tank by opening the air vent ball valve or loosening the vent (breather) on earlier machines.

All return oil entering the tank except for the main pump case drain oil passes through two replaceable filters housed in the filter box.

There is a bypass valve built into each filter preset at 22 psi. which will open in the event the elements become restricted. However a 15 psi. pressure switch installed in the tank will turn on the FILTER BYPASS warning light in the cab before this happens.

Reusable suction strainers situated at the bottom of the hydraulic tank screen oil prior to entering the pumps. Each strainer contains a 2 psi bypass valve.

An optional hydraulic oil heater can be installed for use in cold weather conditions.

The hydraulic hand fill pump, located at the right side of the machine adjacent to the tank, is used for adding oil to the hydraulic oil tank via an oil filter.

During normal operating conditions the filter box is completely filled with oil. Any air present in the system will eventually enter the filter box and be evacuated through the air bleed return hose in the filter covers and discharged into the hydraulic tank.

This return port, which has a reusable strainer connected to it, is also used to collect the pump 'case drain' return oil and receive new oil from the hand fill pump.

FILTER/STRAINER SERVICE NOTE The filters should be checked/changed at the intervals specified in the LUBRICATION AND MAINTENANCE SCHEDULE in SECTION 3 of THIS MANUAL. If the FILTER BYPASS* warning light comes on between scheduled maintenance intervals, STOP THE MACHINE and change these filters. Refer to HYDRAULIC OIL RETURN FILTERS in SECTION 3 of this MANUAL. *NOTE: FILTER BYPASS warning light may come on if oil is not brought up to temperature after cold start ups.

4.5

Tigercat 845B Feller Buncher

Hydraulic system

FIELD SET UP PROCEDURE FOR HYDRAULIC TANK REGULATOR BEFORE SETTING TANK PRESSURE

5. Close the ball valve.

6. Slowly turn the regulator adjusting handle IN, allowing the gauge reading to settle between turns until reading a of 3 to 3.5 psi is obtained. Lock the regulator adjusting handle in place by tightening the locking nut.

1. If a new pressure gauge has been installed excess air that may be trapped in the gauge must be relieved. With the gauge in an upright position momentarily remove the rubber nipple on top of the gauge and insert back into place. Do not cut the rubber nipple off as is indicated.

7. If tank pressure exceeds 3.5 psi open the ball valve and repeat steps 4 to 7.

8. Turn the engine off.

9. Watch the tank pressure gauge for several minutes for any indications of a loss in system pressure.

2. Ensure hydraulic fluid level is within specified limits. Overfilling the tank can cause hydraulic fluid to flow into the regulator disabling the unit.

10. If tank pressure falls check all fittings and connections for leaks. NPT connectors must be fastened using pipe sealant to prevent leakage. A properly installed system should be capable of maintaining constant pressure over night.

3. To ensure that tank pressure is not influenced by any remaining air still circulating through the hydraulic lines allow air to precipitate out of the hydraulic system. This can take up to one or two days.

NOTE: The tank pressure can decrease without substantial leaks due to the contraction of air within the hydraulic tank. This may occur when the air and oil temperature within the tank decreases.

SET UP PROCEDURE 1. Set the engine to FULL throttle. This should provide a no load boost pressure of approximately 10 psi from the turbo manifold.

2. Close the ball valve located behind the hydraulic tank regulator. Turn the regulator adjusting handle in completely. If tank pressure exceeds 12 psi replace the relief valve.

If gauge motion seems erratic and is difficult to adjust there may be air remaining in the hydraulic lines. Sufficient time must be allowed for the excess air to precipitate out of the system before the regulator can be accurately set.

3. Relieve all pressure from the tank by opening the ball valve.

4. Turn the regulator adjusting handle out until it starts to turn freely.

PRESSURE GAUGE

RUBBER NIPPLE

•

HYDRAULIC TANK

•

• REGULATOR ADJUSTING HANDLE

•

•

• AIR FILTER

• • LOCKING NUT

RELIEF VALVE

•

BALL VALVE, AIR VENT

REGULATOR

TURBO AIR FROM ENGINE 845-41

REGULATOR SET-UP PROCEDURE (EARLIER MACHINES) 4.6

Tigercat 845B Feller Buncher

Hydraulic system

4.7

Tigercat 845B Feller Buncher

Hydraulic system SAW PUMP (PISTON PUMP)

SAW PUMP PRESSURE COMPENSATOR

WRIST AND CLAMPS PUMP (GEAR PUMP) (VANE PUMP ON EARLIER MACHINES)

• • • ••

••

BELL HOUSING

MAIN PUMP (PISTON PUMP)

845B-D16

PUMP ASSEMBLY

HYDRAULIC PUMPS All hydraulic functions are powered by three interconnected pumps mounted one behind the other and attached to the flywheel housing of the engine. Drive to the pumps is from the engine via a flexible coupling.

The first pump (main pump) is a piston pump with load sensing and horsepower limiting controls used for main hydraulic circuit.

Driven off the PTO of the main pump is the saw pump. It is a pressure compensated piston pump.

Driven off the PTO of the saw pump is the fixed displacement gear pump (vane pump on earlier machines) used for the clamps, accumulating arm and wrist functions.

MAIN PUMP 845B-45

The main pump is a Linde HPR, axial-piston, variable-displacement pump with load sensing, and horsepower limiting controls.

MAIN PUMP SCHEMATIC

the spring force, swashplate forces and the control pressure forces are balanced.

When all of the main control valves are in the neutral position the pump is destroked and the output is just sufficient to maintain a pressure of approx.500 psi. in the pump output line. The swashplate control piston is in a condition where 4.8

Tigercat 845B Feller Buncher

Hydraulic system

MAIN PUMP WEAR TEST

MARGIN PRESSURE (Also known as differential pressure on Delta P).

1. Plumb a flow measuring device to the line connecting the case drain to tank.

Refer to SET MARGIN PRESSURE in this section.

2. Run the machine and warm up system until the hydraulic oil is up to working temperature.

At this point the LS control valve shifts back to its previous condition and the swashplate control piston will be balanced with the pump output remaining constant until the pressure at the LS port changes. This is a dynamic condition with the swashplate angle changing constantly in response to the load fluctuations. The LS pressure is always equal to the highest work port pressure.

3. Position the machine so that the upper is perpendicular to the tracks. Lower the felling head and raise one track clearly above the ground. Tilt the felling head back fully and turn the swing brake ON. 4. With the engine at high idle, simultaneously hold the R.H. joystick in the TILT BACK position (tilt cylinder bottomed out), hold the swing fully over relief, and fully actuate the suspended track (high speed).

NOTE: If the machine controls are not responding as they should, i.e. boom is jerky or sluggish, the margin pressure setting may be out of adjustment.

5. Record the flow (gpm) coming out of the main pump case drain.

Also refer to ENGINE ANTI-STALL in SECTION 9 of this manual.

Normal/acceptable case drain leakage rate for the main pump under the above conditions is 5 gpm to 8 gpm. With case drain leakage rates greater than 9 gpm, the pump will still operate properly but should be considered for replacement.

HIGH PRESSURE LIMITING CONTROL

•

MARGIN PRESSURE When a function control lever is moved, i.e. joystick or foot pedal, to activate a function, Load Sense (LS) pressure increases to the point where it is equal to the work port pressure and it shifts the LS control valve.

••

HORSEPOWER CALIBRATION DO NOT ADJUST

••

••

•

'P' GAUGE TEST CONN.

• •• L.S. GAUGE TEST CONN.

ENGINE ANTI-STALL SOLENOID VALVE

HIGH PRESSURE LIMITING CONTROL The pump is protected by a high pressure limiting control which is attached to the back of the main control valve manifold. Refer to HIGH PRESSURE LIMITING CONTROL in this section.

103-17A

GAUGE TEST PORT 'X1' ANTI-STALL SIGNAL PRESSURE GAUGE TEST PORT 'L.S.'

MAIN VALVE MANIFOLD

••

SAW PUMP For the operation and adjustments of this pump refer to SECTION 17 of this manual.

WRIST AND CLAMPS PUMP

••

PILOT SUPPLY 'P1'PORT WITH OIL FILTER

•• 822-D65

••

MAIN PUMP

MARGIN PRESSURE ADJUSTING SCREW

The wrist and clamps pump is a gear pump (vane pump on earlier machines) driven off the back of the saw pump. For information on this circuit, refer to SECTION 18 of THIS MANUAL.

MAIN PUMP CONTROLLER (LS CONTROL)

The pump then adjusts its output volume until the pump output pressure exceeds the LS pressure by a small amount. This difference is known as 4.9

Tigercat 845B Feller Buncher LOAD SENSING

Hydraulic system

BASIC PRINCIPALS Figs. 1 & 2 Early hydraulic systems used a fixed displacement pump, with valves to control or adjust flow rates or speeds. This throttling or restricting pump flow to achieve control over the functions causes excess oil to flow over the relief valve. This results in wasting power and at the same time creating heat. SEE FIGS. 1 & 2.

FLOW

853SM18

W USED PRESSURE

FIG. 1

FIXED DISPLACEMENT PUMP

853SM16

FIG. 2

HP

Figs. 3 & 4 In an attempt to recover some of the wasted energy, variable volume pumps evolved. These pumps are power regulated or horsepower controlled and since they reduce the pumps output to maintain a constant system hp, oil flow over the relief valve is less, therefore reducing the wasted power losses and heat generation. SEE FIGS. 3 & 4.

WASTED WASTED

=CO NS

The power wasted in the horsepower control system is still considerable and still requires constant "throttling" by the operator if he wants the speeds to remain as selected.

TAN T

This system combines the energy saving benefits of flow on demand with load compensation at each work port. The compensator eliminates the need for operator flow adjustments (throttling). SEE FIGS. 5 & 6.

FLOW

Figs. 5 & 6 The load control system was developed to address the problems outlined above.

WASTED WASTED

W USED PRESSURE

853SM19 FIG. 3

HP REGULATED PUMP

FIG. 4

853SM16

HP =C ON STA

FLOW

NT

∆p LS W USED PRESSURE

853SM17 FIG.5

LOAD SENSING (FLOW ON DEMAND) 4.10

FIG.6

853SM16

Tigercat 845B Feller Buncher LOAD SENSING BASIC DESCRIPTION

Hydraulic system

OPEN CENTRE VS. CLOSE CENTRE OPEN CENTRE SYSTEM:

853SM21

If the oil flowing to the motor or cylinder meets variable loads, this will upset the balance of oil going to the tank and the load. This causes the speed of the function to change with load changes.

853SM20

With the control valve in neutral all of the oil from the pump “bypasses” through the open center passage directly to tank. There is no backpressure created by the control valve to force oil into the workport (the workport is actually blocked off when the spool is in neutral, and unblocked when the spool begins to move).

853SM20 853SM21

When the control valve lever is moved to actuate a cylinder or motor, the open center passage is blocked off in proportion to the amount the lever is moved. This creates back pressure forcing oil into the valve workport to move the load.

This type of system exhibits the following characteristics; 1. If the load against the cylinder or motor changes, the speed of the function will change.

2. If the load increases on a boom cylinder, the boom will slow or stop. Moving the lever further will increase the pressure against the load, and when high enough, the load will begin to move again.

3. The maximum speed of the function is determined by the maximum flow of the pump.

853SM20

When the control valve lever is fully shifted to the maximum flow position the open center passage is completely blocked, and all of the pump flow is forced against the load.

4.11

Tigercat 845B Feller Buncher CLOSED CENTRE SYSTEM: Load sensing systems use variable flow pumps and only flow oil when required. Unlike the open centre system, the control valve does not have an open centre passage. When in neutral, no oil flows through the control valve to tank and the pump output flow is zero. The pump’s output flow is controlled by a “stroking piston” which is connected to the pump output, and to the valve’s workport or “load”. This sense line to the actual working load defines the system as load sensing.

The key component in the system above is the spring in the stroking piston. The pump’s output pressure must be 250 psi. higher than the load pressure to compress the spring and reduce the flow of the pump. This 250 psi. is the differential or margin pressure.

Hydraulic system adjusts the flow of the pump to find a new balance point. The stroking piston will change the pump’s flow until pump pressure is 250 psi. higher than load pressure.

In the figures below note that even though the load pressure may change, (as illustrated by the extra restriction) the flow remains constant. This is because the difference in pressure, or differential pressure, between the pump and load pressures can be maintained by the stroking piston regardless of load. It is important to remember the pump is really responding to the pressure differential resulting from flow through the valve, not the actual load pressure level.

853SM22

853SM22

In the figure above the valve is closed blocking the pump from the load. With the load at zero the pump will maintain 250 psi. of standby pressure and pump flow is zero.

853SM22

The following are key differences from open centre systems;

853SM22

When the control valve lever is moved to actuate a cylinder or motor, the control valve opens the pump to the load. In this case the load is zero and the pump output pressure falls as the oil escapes through the valve. The 250 psi. that was holding the spring in the compressed state is reduced and the spring moves the pump to increase flow. Flow will increase to a level that requires 250 psi. to force the oil through the valve opening. At this point the load pressure combined with the spring force will be high enough to oppose the pump output pressure, and the stroking piston will stop moving.

Changing the control valve lever changes the size of the opening in the valve and upsets the balance of the stroking piston. The stroking piston then

1. The load sensing valve’s maximum flow is not equal to the pumps maximum flow as with the open centre system. The valves maximum flow is determined by the maximum size of opening or “orifice” it provides.

2. The speed of the load does not change as the load changes. If the load increases on a boom cylinder the pump pressure will increase automatically to maintain the load’s original speed. If the load stops, it is because the load is too heavy for the boom to lift. Moving the lever further will not increase the lifting force.

3. A load sensing system provides the speed the operator selects with the lever, and automatically adjusts the pressure to match the load. The open centre system requires the operator to adjust the pressure to match the load and the speed is determined by the load.

4.12

Tigercat 845B Feller Buncher

Hydraulic system

OPERATING TIPS WITH LOAD SENSING When using the controls on a load sensing system think of what the system is trying to do for you. If you move the lever or pedal 20% of its total angle, the system will provide whatever pressure it takes ( up to its maximum capacity if needed) to meet this speed requirement. If you move the lever past the point needed in an attempt to speed up the boom movement, you will only overshoot the speed you wanted. Open centre systems responded to larger lever angles with increased boom speeds, but this system will not. Relax and try to use the least amount of lever action you can.

Load sensing systems respond to rough operation by amplifying these movements. If you find the boom is jerky or always giving “feedback”, you’re probably too active on the controls. If slowing down doesn’t eliminate the roughness, the margin pressure setting may be too high and can be reduced to calm down the machine’s response.

Refer to SET MARGIN PRESSURE in this section.

Another feature of this system is that the maximum flow of each function, in each direction, can be tuned to your requirements. This is easily done by changing the flow adjusting screws on each control valve. Take the time to set up your machine, as this greatly reduces fatigue.

Refer to SET FLOW (FUNCTION SPEED) RATE in appropriate BOOM, SWING or TRACK DRIVE sections of THIS MANUAL.

4.13

Tigercat 845B Feller Buncher

Hydraulic system tank. In the winter months this resistance could be caused by cold, thick oil and will be noticeable by the hydraulic oil temperature gauge staying in the 'COLD' zone.

MAIN HYDRAULIC CIRCUIT CIRCUIT DESCRIPTION The main hydraulic circuit includes the components for track, boom, stick, tilt and swing operation.

An axial piston, swashplate controlled pump supplies oil for the main hydraulic system. A load sensing signal is sent from the control valve manifold to the pump regulator to control pump output pressure.

Oil flow for each function is supplied by its own control valve. When the control valves are in neutral, there is no flow through the valves, therefore the system is closed-centre. When all control valves are in neutral, the pump will only supply enough oil to make-up for leakage in the system and the pressure remains at a low level (approx. 500 psi). The swing, boom, stick and tilt control valves trap oil in their circuits when the spools are in neutral.

The right and left track control valves are motor spools which have a passage between the work ports and return when the spool is in neutral. The counterbalance valves in the motor circuit trap the oil in the motors. Oil returning to the tank from the control valves must open 75 psi. back pressure check valves in the control valve manifold before flowing to the reservoir. This creates a small positive pressure in the manifold to prevent cavitation in the cylinders and motors. All oil returning to the reservoir is filtered.

OIL COOLER BY-PASS VALVE On later 845B models, an oil cooler by-pass valve has been installed on one of the two "tank" return ports on the main Linde valve base manifold. The bypass valve incorporates a 100 psi check valve. If the BY-PASS VALVE

BY-PASS VALVE ADJUSTING SCREW

•

• MAINE LINDE VALVE

••

To compensate for the cold temperatures an adjusting screw on the by-pass valve can be used to hold the by-pass check valve in the OPEN position, permanently allowing return oil from the maine Linde valve "tank" port to flow directly to the hydraulic tank and by-pass the oil cooler.

To make this adjustment loosen the locknut on the 100 mm long adjusting screw and screw the adjusting screw IN as far as it will go. Tighten the locknut on the adjusting screw. In the warmer months loosen the locknut and unscrew the adjusting screw until the end of the screw is no longer in contact with the end of the check valve poppet, this will be noticeable by the screw turning easier. Tighten locknut on adjusting screw.

FLOW ON DEMAND AND LOAD COMPENSATION The combination of control valves and pump used in this system provides flow on demand and load compensation. Flow on demand means that only the required quantity of oil will be delivered to a function by the pump. This will save energy and reduce heat generation in the hydraulic system. Load compensation means that all functions will continue to receive oil regardless of their pressure and without further movement of the control levers.

Without this system, an operator moving control levers halfway on the boom up and stick out controls would find that the lowest pressure function would move and the other would not move. To make both functions move the operator would have to move the high load lever much more than the low load lever. In other words, the operator would have to restrict oil flow to one function while opening up the valve fully to the other. This is what the load compensation system does automatically as will be explained further below.

With the load compensation on this unit the operator does not need to continually adjust the control lever to move two or more functions because of pressure differences.

Valves inside of the main control valve spools will automatically adjust flow according to the pilot OIL COOLER BY-PASS VALVE pressure applied to the spool to move functions 845B-D28 oil cooler causes a resistance in excess of 100 psi. to independent of load pressure. the return oil entering the oil cooler, the check valve will open and direct a portion of the hydraulic oil to

4.14

Tigercat 845B Feller Buncher

845B-01

Hydraulic system

LOAD SENSING SYSTEM CIRCUIT DIAGRAM 4.15

Tigercat 845B Feller Buncher R.H. TRACK DRIVE

MAIN BOOM CYLINDERS

SWING

Hydraulic system L.H. TRACK DRIVE

TILT CYLINDER

• •

•

HIGH PRESSURE LIMITING CONTROL

STICK CYLINDER CONTROL VALVE MANIFOLD

• •

•

•

•

101-1

MAIN CONTROL VALVE

MAIN CONTROL VALVE DESCRIPTION

CONTROL VALVE SECTIONS

The main control valve consists of six individual valve sections, a high pressure limiting relief valve and a non adjustable safety relief. Each section, including the relief valve is fastened to the control valve manifold which contains five common passages for all valves.

The spools are pilot actuated and returned to neutral by centering springs. An air bleed plug is provided on the top pilot cap. If a hesitation is noticed when actuating a function, air should be bled from the pilot caps. Spool travel stop screws are fitted in the pilot end caps and are used to limit the spool travel so that maximum speed can be adjusted for each individual function. The screws can also be turned in to lower the boom or stick when the engine or pump will not operate.

The five passages are: (Refer to fig. 853sm24) 1. Centre passage for pump 2. Two passages for return (connected internally) 3. Two for load sensing (connected internally)

The swing and travel spools have return pilot checks in the end caps which allow pilot oil to enter quickly but restrict the flow out thus dampening the movement of the control spool for smoother control of the function.

DRIVE MOTOR SPOOL SECTIONS The swing, left track and right track valve sections have make-up valves for anti-cavitation. See FIG. 90919.

2

BOOM FUNCTIONS SPOOL SECTIONS

3

The Boom, stick and tilt functions have relief and anti-cavitation valves. See FIG. 90744 with spool in NO-FLOW position and FIG. 90744-2 with spool in FLOW position.

1

853SM24

MANIFOLD/VALVE SECTION SCHEMATIC WITH RELIEF 4.16

Tigercat 845B Feller Buncher MAKE UP OR ANTICAVITATION VALVE

Hydraulic system MAKE UP OR ANTICAVITATION VALVE

WORK PORTS

•

•

PILOT CHECK

•

PILOT END CAP AIR BLEED PLUG

•

•

SPOOL TRAVEL STOP (ADJUSTABLE)

• •

•

•

•

BALL AND SPRING

LOAD SENSING 'LS'

•

COMPENSATOR VALVE PUMP 'P' RETURN 'T'

RETURN 'T'

LOAD SENSING 'LS'

CONTROL VALVE SECTION - TYPICAL FOR TRACK DRIVE AND SWING FUNCTION

90919

WORK PORTS

ANTICAVITATION RELIEF VALVE MAX. FLOW ADJUSTING SCREW

•

ANTICAVITATION RELIEF VALVE

• •

•

• • • MAIN CONTROL SPOOL COMPENSATOR RETURN 'T'

PUMP 'P'

RETURN 'T'

90744

CONTROL VALVE SECTION - TYPICAL FOR CYLINDER OPERATED FUNCTIONS (SHOWN IN NO-FLOW POSITION)

90744-2

CONTROL VALVE SECTION - TYPICAL FOR CYLINDER OPERATED FUNCTIONS (SHOWN IN FLOW POSITION) 4.17

Tigercat 845B Feller Buncher PORT RELIEF AND ANTICAVITATION VALVE OPERATION

Hydraulic system MEDIUM SYSTEM PRESSURE

During normal operation, oil pressure in the work circuit is less than the circuit relief valve setting and the circuit relief valve remains closed.

During relief operation, the relief valve will open in three steps.

(Step 1) The pilot poppet 'D' is opened; Flow restriction through the hollow piston 'C' causes the pressure in the cavity behind the main poppet 'B' to decrease.

PILOT POPPET 'D'

• WORK PORT

• •

•

• RETURN

ORIFICE 'A'

NORMAL OPERATION

90744-4A

(Step 2) The piston seats against the poppet.

This further reduces oil flow into the cavity and greatly decreases the pressure against the back side of the main poppet.

MEDIUM SYSTEM PRESSURE

HIGHEST SYSTEM PRESSURE

•

(Step 3) The main poppet 'B' opens.

When the relief valve again closes, the piston and the pilot poppet move together until the pilot poppet is seated. Oil flows into the cavity through the clearance between the piston and the main poppet to move the piston away from the pilot poppet. This permits flow into the cavity through the piston to seat the main poppet.

RELIEF AND HOLLOW ANTICAVITATION PISTON 'C' POPPET 'B'

•

WORK PORT

• RETURN

RELIEF OPERATION

90744-6A

During anticavitation operation the main poppet 'B' will retract to allow oil to flow from the return passage into the work circuit.

LOW WORK PORT PRESSURE

ADJUSTING PROCEDURE 1. Loosen locknut.

•

WORK PORT

2. Turn the adjusting screw to obtain desired pressure reading on gauge.

• RETURN

3. Tighten locknut on adjusting screw making sure adjusting screw does not turn.

90744-5A

ANTICAVITATION OPERATION

4. Re-check pressure gauge reading.

Refer to SET MAIN BOOM, STICK AND PORT RELIEF VALVES in SECTION 12 of THIS MANUAL for more complete details.

PORT RELIEF VALVE

LOCKNUT • 17MM WRENCH

• • • • MAIN VALVE BODY

90744-4

4.18

ADJUSTING SCREW • 5MM ALLEN KEY

MAIN VALVE PORT RELIEF VALVE

Tigercat 845B Feller Buncher

Hydraulic system

CONTROL VALVE SPOOL OPERATION To achieve load sensing compensation, each control spool has two compensator valves and two L.S. check valves. These compensator valves can be either in the form of a shuttle valve or a ball, depending on the function being controlled.

PILOT END CAP

SHUTTLE COMPENSATOR CONTROL VALVE VALVE SPOOL

COMPENSATOR VALVE

SHUTTLE VALVE

PILOT END CAP

•

•

•

• CENTERING SPRING

•

•

• •

•

•

• •

• •

•

•

LOAD SENSING WORK WORK PASSAGE 'LS' PORT 'A' PORT 'B' SUPPLY RETURN RETURN PASSAGE 'P' PASSAGE 'T' PASSAGE 'T'

LOAD SENSING PASSAGE 'LS'

CENTERING SPRING

(A) CONTROL VALVE SECTION ~ IN NEUTRAL

853SM25

(A) Each work port (A & B) has a compensator valve and shuttle valve. Each valve section also has two return passages (T) and two load sensing passages (LS). Each valve section has only one supply passage (P).

With the control valve spool held in neutral by the centering springs in both pilot caps, the pump discharge is blocked. Therefore, the control valves are closed centre. Pump discharge, work port, return, and load sensing passages are all blocked by the spool. Oil in the work ports is trapped.

With all control valve spools in neutral, pump discharge or "standby" oil pressure is approximately 400-600 psi.

PILOT OIL

LS PORT JUST OPENED

SHUTTLE VALVE

CONTROL SPOOL

• •

(B) CONTROL VALVE SECTION ~ • CONTROL SPOOL STARTING TO MOVE TO RIGHT • LS PORT JUST OPENED • ONLY SPOOL ACTUATED 853SM26

(B) Whenever a single function is operated, pilot oil flows to a control valve end cap. Pilot oil will start to move the spool against the centering spring on the opposite end of the spool. The load sensing port (LS) is the first port to open. When the LS port is opened, the shuttle cavity is at LS pressure. Since this is the first function being operated, there is no LS pressure in the manifold and the shuttle does not move.

4.19

Tigercat 845B Feller Buncher PILOT OIL

Hydraulic system SHUTTLE VALVE

•

BALANCE VALVE

•

CONTROL SPOOL

•

WORK PORT 'A' JUST OPENED

(C) CONTROL VALVE SECTION ~ • CONTROL SPOOL CONTINUES TO MOVE TO RIGHT • WORK PORT 'A' JUST OPENED • HIGHEST WORKING PRESSURE

853SM27

(C) The second port to open is work port ‘A’ (port ‘B’ if the control spool moves to the left). The left compensator valve stays to the right as in the neutral condition and the shuttle valve moves to the left directing work port pressure to the area behind the compensator valve to hold it shut until it can be opened by pressure in the ‘P’ port. In this mode, the compensator valve is functioning as a load check valve would in a conventional valve.

PILOT OIL

(5) SHUTTLE (6) COMPENSATOR VALVE VALVE MOVES LEFT

CONTROL SPOOL

TANK PORT 'T' (RETURN)

(1) ANGLED VENT PORT OPENS

• •

•

•

• •

(4) OIL FLOWS TO 'LS' PASSAGE

(3) PRESSURE PORT OPENED SLIGHTLY

(2) WORK PORT 'B' OPENS

(D) CONTROL VALVE SECTION ~ • CONTROL SPOOL CONTINUES TO MOVE TO RIGHT 853SM28

• PRESSURE PORT OPENED SLIGHTLY • HIGHEST WORKING PRESSURE

(D) The next port to open is the angled vent port (1) on the right side of the control spool which connects to the tank port, ‘T’. This connects all passages in the compensator spool to return pressure. There is no movement at this time but as soon as the work port ‘B’ opens (2) and oil flows, the returning oil will push the compensator valve to the right and connect ‘B’ to ‘T’.

The pressure port in the control spool is the last port to open (3). When it opens, pump discharge pressure flows through the passage in the compensator spool and through the shuttle cavity to the load sense passage (4).

The load sensing pressure increases causing the pump to increase its displacement and further increase the pressure. The compensator valve keeps the work port passage closed until the pump discharge pressure is higher than the work port pressure (load check feature).

Once the pump discharge pressure is higher, the shuttle valve moves to the right (5) and connects load sensing pressure to the cavity behind the compensator valve. The compensator valve moves to the left (6) allowing oil to flow to the work port. With the compensator valve open, the cavity to the right of the compensator valve assumes approximate work port pressure and this pressure flows through the passage to the shuttle cavity allowing work port pressure to control load sensing pressure. As the control spool moves further, in response to pilot pressure, the compensator valve and shuttle valve positions remain the same.

4.20

Tigercat 845B Feller Buncher PILOT OIL

(1) COMPENSATOR VALVE

Hydraulic system CONTROL SPOOL FULLY SHIFTED TO RIGHT

SHUTTLE VALVE

•

•• •

•

•

•

•

•

•

LOAD SENSING WORK WORK LOAD SENSING PASSAGE 'LS' PORT 'A' PORT 'B' PASSAGE 'LS' SUPPLY PASSAGE 'P' RETURN RETURN (PUMP DISCHARGE) PASSAGE 'T' PASSAGE 'T'

(E) CONTROL VALVE SECTION ~ • CONTROL SPOOL FULLY SHIFTED TO RIGHT • HIGHEST WORKING PRESSURE

853SM29

(E) In this figure, pump discharge pressure is slightly higher than work port pressure because the compensator valve (1) is open. When using just one function both the compensator valve and the shuttle valve are moved to the end of their bores.

The load sensing pressure is always the same as the highest work port pressure and as a result is always lower than pump discharge pressure. There are two factors that establish this pressure difference between pump discharge and work port pressure, the load sensing valve and the orifice effect of the passages in the control valve between the pump discharge port and the work port. There are three openings the pump discharge oil must flow through to get to the work port. Each time the oil flows through a passage there is a pressure drop, that is, there is an orifice at each passage. The smaller the opening the smaller the oil flow due to the constant load sensing pressure. There is a passage from the work port to the load sensing passage and this is the pressure sensed at the pump regulator; since the flow is very small there is virtually no pressure drop from the work port to the LS port on the pump.

Load sensing pressure is the same at both ends of all the control spools because the two passages in the control valve manifold are joined together in the manifold.

LOAD SENSING ~ TWO OR MORE FUNCTIONS IN USE Load compensation comes into effect whenever two or more functions are actuated at the same time.

The following is an explanation of the function of the valve components whenever a spool with a lower working pressure is activated when a higher working pressure spool is fully shifted.

PILOT OIL

LS PORT JUST OPENED

COMPENSATOR (2) SHUTTLE VALVE MOVES TO RIGHT VALVE

(1) CONTROL SPOOL STARTS TO MOVE

CENTERING SPRING

• ••

•

(F) CONTROL VALVE SECTION ~ • CONTROL SPOOL STARTING TO MOVE TO RIGHT 853SM30

• LS PORT JUST OPENED • LOWER WORKING PRESSURE

(F) Pilot oil will start to move the control spool against the centering spring on the opposite end of the spool. The LS port is the first to open and load sensing pressure is applied to the shuttle valve. The shuttle valve moves to the right to the end of its bore and then LS pressure flows into the cavity at the left end of the compensator valve.

4.21

Tigercat 845B Feller Buncher

Hydraulic system

SHUTTLE VALVE

PILOT OIL

CONTROL SPOOL

COMPENSATOR VALVE

•

•

•

WORK PORT 'A' JUST OPENED

(G) CONTROL VALVE SECTION ~• CONTROL SPOOL CONTINUES TO MOVE TO RIGHT • WORK PORT 'A' JUST OPENED • LOWER WORK PORT PRESSURE

853SM31

(G) As the control spool continues to move, the work port is the next to open. The work port oil pressure passes through compensator valve port and is applied to the end of the shuttle valve but since this work port pressure is lower than LS, the shuttle does not move.

PILOT OIL

SHUTTLE VALVE

(4) COMPENSATOR VALVE MOVES LEFT THEN RIGHT (5)

•

CONTROL SPOOL

•

TANK PORT 'T' (RETURN)

(1) ANGLED VENT PORT OPENS

• •

• •

OIL FLOWS TO 'LS' PASSAGE

(3) PRESSURE PORT OPENED SLIGHTLY

(2) WORK PORT 'B' OPENS

(H) CONTROL VALVE SECTION ~ • CONTROL SPOOL CONTINUES TO MOVE TO RIGHT 853SM32

• PRESSURE PORT OPENED SLIGHTLY • LOWER WORKING PRESSURE

(H) As the control spool continues to move, the angled vent port opens (1), then work port ‘B' opens (2) allowing oil to flow and shift the right side compensator valve connecting port 'B' to 'T'. The pressure port ‘P’ is next to open (3) and supply pressure passes into the cavity to the right of the compensator valve causing it to shift to the left (4) since the supply pressure is somewhat greater than LS pressure. As it shifts to the left (4) oil can travel into work port ‘A’ and in doing so it causes pressure in the cavity to drop which results in LS pressure pushing the compensator valve back to the right (5). The compensator finds a position where the pressures are balanced and some oil flows into work port ‘A’.

4.22

Tigercat 845B Feller Buncher PILOT OIL

Hydraulic system (1) CONTROL SPOOL FULLY SHIFTED TO RIGHT

(2) COMPENSATOR VALVE SETTLES IN A BALANCE POSITION

•

• •

•

•

•

•

•

•

WORK LOAD SENSING WORK LOAD SENSING PORT 'A' PASSAGE 'LS' PORT 'B' PASSAGE 'LS' RETURN RETURN SUPPLY PASSAGE 'P' PASSAGE 'T' PASSAGE 'T' (PUMP DISCHARGE)

(I) CONTROL VALVE SECTION ~ • CONTROL SPOOL FULLY SHIFTED TO RIGHT 853SM33

• LOWER WORKING PRESSURE

(I) As the control spool continues to move (1), the compensator spool continues to move in response to the pressure variations and it settles in a position of balance (2) as shown in the figure with the spool fully shifted. As the loads vary in the work ports, the valve components continue to modulate and compensate for the load variations and maintain movement of the selected functions.

This valve system performs the functions automatically that are performed by an operator using a conventional system as explained in the third paragraph above.

If the second valve being operated had a higher work port pressure than the one already selected, the operation would be the same up to the point where the work port was opened. At this point the LS would change to the new higher work port pressure and the new valve would act in the same way as the first valve selected and described above. The first valve selected would then have the internal spool components take the same positions as the lower work port pressure valve described above.

4.23

Tigercat 845B Feller Buncher HIGH PRESSURE LIMITING CONTROL VALVE The main pump is protected by a High Pressure Limiting control which consists of three relief valve cartridges. The H.P.L. control is attached to the main control valve manifold and contains three relief valves: The first relief valve (P2) limits L.S. pressure to approx. 4000 psi. (Gauge at 'L.S.' test port) which in turn limits the pump output pressure to 4300 psi. (Gauge at 'P' test port) The 300 psi. differential is known as margin pressure. See SET MARGIN PRESSURE in THIS SECTION.

Hydraulic system P2 L.S. PRESSURE LIMIT, SET AT 4300 PSI. WITH GAUGE ON 'P' TEST PORT • 4MM ALLEN KEY • 13MM WRENCH

P1. SCREWED FULLY IN NOT USED

•

MAIN CONTROL VALVE MANIFOLD

•

• SYSTEM RELIEF VALVE NON-ADJUSTABLE

Margin pressure is the difference between 'P' port pressure and L.S. port pressure, observed while a function is operating.

The second relief is a system relief valve which limits the pump output pressure to 870 psi above L.S. pressure, this relief is non-adjustable.

The third relief valve (P1) is screwed fully in and is not used.

853SM24

•

• HIGH PRESSURE LIMITING CONTROL

845B-D20

HIGH PRESSURE LIMITING CONTROL VALVE

H.P.L. CONTROL VALVE ON MANIFOLD SHOWING A VALVE SECTION WITH PORT RELIEFS 4.24

Tigercat 845B Feller Buncher

Hydraulic system

PILOT PRESSURE 11.3 MM

ENGINE ANTI-STALL PROPORTIONAL SOLENOID VALVE

•

•

• ANTI-STALL CALIBRATION

TANK

DO NOT ADJUST REQUIRES TEST BENCH FOR READJUSTMENT GAUGE TEST PORT 'X1'

•

•

•

•

•

LOAD SENSE PRESSURE 8 MM

•

•

MARGIN PRESSURE ADJUSTING SCREW • 8mm WRENCH • 19mm WRENCH (Turn OUT to decrease Margin pressure)

PUMP OUTLET PRESSURE PUMP SWASH CONTROL PASSAGE

TANK

MAIN PUMP CONTROL VALVE The margin pressure adjustment is made at the main pump controller attached to the main pump.

MARGIN PRESSURE is the difference between The pressure gauge connections are the 'L.S.' the LOAD SENSE pressure and the PUMP and 'P' gauge test ports on the Linde main valve OUTPUT pressure while a function (boom, manifold. swing or travel) is being operated. For the load

90669

SET MARGIN PRESSURE

sensing system to operate correctly the differential pressure between L.S. and 'P' should be 300 psi. 'P' being higher than L.S.

LINDE MAIN VALVE MANIFOLD

•

**NOTE: If the margin pressure is not set correctly, the machine controls may not respond as they should, i.e. boom is jerky or sluggish.

••

HORSEPOWER CALIBRATION DO NOT ADJUST

'P' GAUGE TEST PORT

••

ENGINE ANTI-STALL SOLENOID VALVE

••

822-D65

••

••

MARGIN PRESSURE ADJUSTING SCREW

103-17A

• •

PILOT SUPPLY 'P1'PORT WITH OIL FILTER

MAIN MAIN PUMP PUMP

•

•

HIGH PRESSURE LIMITING CONTROL

•• ••

L.S. PRESSURE RELIEF VALVE ADJUSTING SCREW • 5MM ALLEN KEY • 17MM WRENCH 'LS' GAUGE TEST PORT

GAUGE TEST PORT 'X1' ANTI-STALL SIGNAL PRESSURE GAUGE TEST PORT 'L.S.'

••

GAUGE TEST PORTS

The margin pressure is set at the factory to 300 psi. Minor adjustments may be made to this value, however the flow stops on the valves must be reset in order to maintain the same speed of the functions.

1. Use a differential pressure gauge* (preferably a differential gauge with ten psi increments).

MAIN PUMP CONTROLLER (LS CONTROL) 4.25

Tigercat 845B Feller Buncher

*

DO NOT use a single pressure gauge to set the margin pressure, a small difference in this pressure value (less than 50 psi.) can make a significant difference in machine performance.

2. With hydraulic oil at operating temperature, Connect one side of the differential pressure gauge to the 'LS' gauge port located on the back of the main control valve manifold and the other side of the gauge to the pressure 'P' gauge test port.

Hydraulic system SET LOAD SENSE RELIEF VALVE NOTE: Constant loosening and tightening of the locknut (sealnut) on the adjusting screws of these relief valves will eventually cause the seal in the nut to break down and leak.

Because of this it is best to keep the adjusting procedure brief.

1. With hydraulic oil at operating temperature, Connect a 0 - 5000 psi gauge to 'P' gauge test port on back of main control valve manifold.

3. Start the engine and place throttle control in FULL position.

LINDE MAIN VALVE MANIFOLD

4. Lower left armrest, press PILOT RESET button to activate pilot system and turn antistall switch OFF.

•

••

L.S. PRESSURE RELIEF VALVE ADJUSTING SCREW • 5MM ALLEN KEY • 17MM WRENCH 'LS' GAUGE TEST PORT 'P' GAUGE TEST PORT

5. Turn swing brake ON and place RH. joystick in FULL SWING position (left or right).

••

6. Loosen locknut on margin pressure adjusting screw on main pump controller and turn adjusting screw until the differential reading on gauge is 300 psi**. (Turn OUT to decrease Margin pressure).

NOTE: This is a sensitive adjustment, significant changes in pressure will be noticed with only a small movement of the adjusting screw. **NOTE: If the margin pressure is not set correctly, the machine controls may not respond as they should, i.e. boom is jerky or sluggish.

7. Allow a short time for pressure reading to stabilize then tighten locknut on adjusting screw. Repeat above procedure to verify the differential pressure setting is still correct.

•

•

HIGH PRESSURE LIMITING CONTROL

GAUGE TEST PORTS 2. Start engine and set throttle control to FULL position.

103-17A

3. Press PILOT RESET button to activate pilot system and turn anti-stall switch OFF. 4. While holding L.H. joystick in the STICK OUT position (fully extended), loosen locknut on P2 relief valve cartridge and turn adjusting screw until pressure gauge reads 4300 psi. Tighten locknut on adjusting screw and re-check pressure reading on gauge.

5. Stop engine and remove pressure gauge.

4.26

Tigercat 845B Feller Buncher PRESSURE SETTINGS

Hydraulic system

WITH Tigercat DISC SAW FELLING HEAD ENGINE RPM (With Cummins 6CTA8.3 engine) FULL THROTTLE, NO LOAD, MAX. ................................... 2375 RPM IDLE, NO LOAD ........................................................... 1000 RPM RATED WORKING ........................................................... 2200 RPM L.H. FINAL DRIVE CROSSLINE RELIEFS ........................................................ 4700 PSI (CRACKING PRESSURE) BEGIN OF REGULATION .................................................... 3600 PSI BRAKE RELEASE ........................................................... 500 PSI SPEED: LOW ..................................................................... 12 RPM (TRACK DRIVE SPROCKET) DRIVE .................................................................. 24 RPM (TRACK DRIVE SPROCKET) R.H. FINAL DRIVE CROSSLINE RELIEFS ........................................................ 4700 PSI (CRACKING PRESSURE) BEGIN OF REGULATION .................................................... 3600 PSI BRAKE RELEASE ........................................................... 500 PSI SPEED: LOW ..................................................................... 12 RPM (TRACK DRIVE SPROCKET) DRIVE .................................................................. 24 RPM (TRACK DRIVE SPROCKET) MAIN PUMP START OF ANTI-STALL OUTPUT: ANTI-STALL MODULE AX087 ........................................... 2200 RPM ANTI-STALL MODULE AX159 ........................................... 2100 RPM HIGH PRESSURE LIMITING CONTROL on main Linde valve MAIN RELIEF ........................................................ NON-ADJUSTABLE LOAD SENSE RELIEF P1 ................................................... SCREW IN FULLY (LOCKED OUT) LOAD SENSE RELIEF P2 ................................................... 4300 PSI AT 'P' PORT(4000 PSI AT 'LS' PORT) BOOM PORT RELIEFS ....................................................... 4700 PSI AT 'P' PORT STICK PORT RELIEFS ........................................................ 4700 PSI AT 'P' PORT TILT PORT RELIEFS ........................................................ 4700 PSI AT 'P' PORT MARGIN PRESSURE ........................................................ 300 PSI PILOT SUPPLY MAIN RELIEF ........................................................ 425 PSI SWING CROSSLINE RELIEFS ........................................................ 3000 PSI AT 'L.S.' PORT or 3300 PSI AT 'P' PORT SPEED ................................................................................. 6-7 RPM SAW PUMP (Tigercat and Koehring Waterous felling head) PRESSURE OVERRIDE ...................................................... 3600 PSI SAW CONTROL VALVE MAIN RELIEF ....................................................................... 4000 PSI SAW MOTOR (Tigercat DT5001) BEGIN OF REGULATION .................................................... 3200 PSI SPEED ................................................................................. 1250 - 1300 RPM MOTOR 'X' DIMENSION ..................................................... 22MM (0.88") OF 100MM (3.94") SAW MOTOR (Tigercat DT5501) BEGIN OF REGULATION .................................................... 3200 PSI SPEED ................................................................................. 1125 - 1175 RPM MOTOR 'X' DIMENSION ..................................................... 22MM (0.88") OF 100MM (3.94") SAW MOTOR (Tigercat and Koehring Waterous felling head) BEGIN OF REGULATION .................................................... 3200 PSI SPEED ................................................................................. 1150 - 1200 RPM MOTOR 'X' DIMENSION ..................................................... 22MM (0.88") OF 100MM (3.94") WRIST / CLAMPS VALVE MAIN RELIEF ........................................................................... 2700 PSI WRIST PORT RELIEFS .......................................................... 3200 PSI CLAMP ARMS PORT RELIEFS .............................................. 3200 PSI ACCUMULATOR ARMS PORT RELIEFS .............................. 3200 PSI

ALL PRESSURES MUST BE SET WITH HYDRAULIC OIL AT OPERATING TEMPERATURE. NOTE: The above values are for referance purposes only, SEE SERVICE MANUAL FOR SETTING PROCEDURES. ISSUE 2 902

4.27

Tigercat Feller Buncher Tigercat 845B H845B harvester PRESSURE SETTINGS

Hydraulic Hydraulic system System

WITH H845B LOGMAX ATTACHMENT ENGINE RPM (With Cummins 6CTA8.3 engine) FULL THROTTLE, NO LOAD, MAX. ................................ 2375 RPM IDLE, NO LOAD ......................................................... 1000 RPM RATED WORKING ......................................................... 2200 RPM L.H. FINAL DRIVE CROSSLINE RELIEFS ..................................................... 4700 PSI (CRACKING PRESSURE) BEGIN OF REGULATION ................................................ 3600 PSI BRAKE RELEASE ......................................................... 500 PSI SPEED: LOW ................................................................. 12 RPM (TRACK DRIVE SPROCKET) DRIVE ............................................................... 24 RPM (TRACK DRIVE SPROCKET) R.H. FINAL DRIVE CROSSLINE RELIEFS ..................................................... 4700 PSI (CRACKING PRESSURE) BEGIN OF REGULATION ................................................ 3600 PSI BRAKE RELEASE ......................................................... 500 PSI SPEED: LOW ................................................................. 12 RPM (TRACK DRIVE SPROCKET) DRIVE ............................................................... 24 RPM (TRACK DRIVE SPROCKET) MAIN PUMP START OF ANTI-STALL OUTPUT: ANTI-STALL MODULE AX087 ........................................... 2200 RPM ANTI-STALL MODULE AX159 ........................................... 2100 RPM PILOT SUPPLY MAIN RELIEF ...................................................... 425 PSI SWING CROSSLINE RELIEFS ..................................................... 3000 PSI AT ‘L.S.’ PORT or 3300 PSI AT ‘P’ PORT SPEED ...................................................... 6-7 RPM HIGH PRESSURE LIMITING CONTROL on main Linde valve MAIN RELIEF ...................................................... NON-ADJUSTABLE LOAD SENSE RELIEF P1 ................................................ SCREW IN FULLY (LOCKED OUT) LOAD SENSE RELIEF P2 ................................................ 4300 PSI AT ‘P’ PORT(4000 PSI AT ‘LS’ PORT) BOOM PORT RELIEFS .................................................... 4700 PSI AT ‘P’ PORT STICK PORT RELIEFS .................................................... 4700 PSI AT ‘P’ PORT HEEL PORT RELIEFS ..................................................... 3000 PSI AT ‘P’ PORT ATTACHMENT PORT RELIEFS (PUMP 2) ..................... 3750 PSI (LS-port, FULL FLOW) MARGIN PRESSURE ...................................................... 300 PSI SAW PUMP (PUMP 1) PRESSURE OVERRIDE .................................................. 3200 PSI SAW CONTROL VALVE (PUMP 1) MAIN RELIEF ................................................................... 4000 PSI ROTATE VALVE MAIN RELIEF ................................................................... 2700 PSI

ALL PRESSURES MUST BE SET WITH HYDRAULIC OIL AT OPERATING TEMPERATURE. NOTE: The above values are for referance purposes only, SEE SERVICE MANUAL FOR SETTING PROCEDURES.

ISSUE 2 902

4.28

Tigercat Feller Buncher Tigercat845B H845B harvester PRESSURE SETTINGS

Hydraulic Hydraulic system System

“STANDARD” SETTINGS LESS ATTACHMENT HEAD ENGINE RPM (With Cummins 6CTA8.3 engine) FULL THROTTLE, NO LOAD, MAX. ................................ 2375 RPM IDLE, NO LOAD ......................................................... 1000 RPM RATED WORKING ......................................................... 2200 RPM L.H. FINAL DRIVE CROSSLINE RELIEFS ..................................................... 4700 PSI (CRACKING PRESSURE) BEGIN OF REGULATION ................................................ 3600 PSI BRAKE RELEASE ......................................................... 500 PSI SPEED: LOW ................................................................. 12 RPM (TRACK DRIVE SPROCKET) DRIVE ............................................................... 24 RPM (TRACK DRIVE SPROCKET) R.H. FINAL DRIVE CROSSLINE RELIEFS ..................................................... 4700 PSI (CRACKING PRESSURE) BEGIN OF REGULATION ................................................ 3600 PSI BRAKE RELEASE ......................................................... 500 PSI SPEED: LOW ................................................................. 12 RPM (TRACK DRIVE SPROCKET) DRIVE ............................................................... 24 RPM (TRACK DRIVE SPROCKET) MAIN PUMP START OF ANTI-STALL OUTPUT: ANTI-STALL MODULE AX087 ........................................... 2200 RPM ANTI-STALL MODULE AX159 ........................................... 2100 RPM PILOT SUPPLY MAIN RELIEF ...................................................... 425 PSI SWING CROSSLINE RELIEFS ..................................................... 3000 PSI AT ‘L.S.’ PORT or 3300 PSI AT ‘P’ PORT SPEED ...................................................... 6-7 RPM HIGH PRESSURE LIMITING CONTROL on main Linde valve MAIN RELIEF ...................................................... NON-ADJUSTABLE LOAD SENSE RELIEF P1 ................................................ SCREW IN FULLY (LOCKED OUT) LOAD SENSE RELIEF P2 ................................................ 4300 PSI AT ‘P’ PORT(4000 PSI AT ‘LS’ PORT) BOOM PORT RELIEFS .................................................... 4700 PSI AT ‘P’ PORT STICK PORT RELIEFS .................................................... 4700 PSI AT ‘P’ PORT HEEL PORT RELIEFS ..................................................... 3000 PSI AT ‘P’ PORT ATTACHMENT PORT RELIEFS (PUMP 2) ..................... 3600 PSI (LS-port, FULL FLOW) MARGIN PRESSURE ...................................................... 300 PSI SAW PUMP (PUMP 1) PRESSURE OVERRIDE .................................................. 3600 PSI SAW CONTROL VALVE (PUMP 1) MAIN RELIEF ................................................................... 4000 PSI ROTATE VALVE MAIN RELIEF ................................................................... 2700 PSI

ALL PRESSURES MUST BE SET WITH HYDRAULIC OIL AT OPERATING TEMPERATURE. NOTE: The above values are for referance purposes only, SEE SERVICE MANUAL FOR SETTING PROCEDURES.

ISSUE 2 902

4.29

Tigercat 845B Feller Buncher

Hydraulic system

4.30

Tigercat 845B Feller Buncher

SECTION 5 - PILOT SYSTEM JUNE 2003

CONTENTS - SECTION 5 ACCUMULATOR CHARGING ............................................................................................... 5.10 CHECK PRE-CHARGE PRESSURE ......................................................... 5.10 GENERAL DESCRIPTION ........................................................................... 5.5 TESTING DEVICE ..................................................................................... 5.10 CIRCUIT DESCRIPTION .................................................................................. 5.7 CIRCUIT DIAGRAM ......................................................................................... 5.8 ELECTRICAL CIRCUIT .................................................................................... 5.6 PILOT SUPPLY MANIFOLD ........................................................................... 5.4 PILOT SYSTEM COMPONENTS ACCUMULATOR ............................................................................... 5.5, 5.10 HIGH PRESSURE FILTER .......................................................................... 5.3 JOYSTICKS AND FOOT PEDALS ............................................................... 5.6 PILOT MANIFOLD ....................................................................................... 5.4 PILOT SUPPLY VALVE .............................................................................. 5.3 PRESSURE SETTINGS .................................................................................. 5.9

Tigercat 845B Feller Buncher PILOT SYSTEM COMPONENTS

Pilot system

The closed centre pilot circuit receives oil from the main hydraulic system (main pump). The supply of pilot oil originates at a 'P' port on the base manifold of the main control valves, the pilot oil passes through a "high pressure" filter to the pilot supply valve (pressure reducing/relieving valve) which maintains the pilot pressure at 425 psi. From there, pilot oil (425 psi) is supplied

to the 'P1' port on the anti-stall valve attached to the main pump and also the IN port of the pilot manifold. The pilot manifold distributes pilot pressure oil to all of the pilot controlled hydraulic circuits throughout the machine. A pilot shut-off solenoid valve cartridge located at the IN port on the pilot manifold will shut down or deactivate the pilot system whenever the left armrest is in the raised position.

PILOT MANIFOLD

PILOT SYSTEM ACCUMULATOR

•• •

••

PILOT FILTER

HIGH PRESSURE LIMITING CONTROL

•

••

FROM WRIST/CLAMPS/ SAW VALVE 'PB' PORT

'T3' TANK CONNECTION WITH CHECK VALVE

PILOT SUPPLY VALVE

• • •

MAIN LINDE VALVE/MANIFOLD

• •

'P' PORT OUT TO PILOT FILTER

845B-D38

PILOT SYSTEM COMPONENTS 5.2

Tigercat 845B Feller Buncher

Pilot system ADJUSTING SCREW

CLOG INDICATOR

•

LOCKNUT

•

PRESSURE REDUCING/RELIEVING VALVE CARTRIDGE

221-14A

• •

PILOT SUPPLY VALVE

PILOT SUPPLY VALVE (pressure reducing/relieving valve) The pilot supply valve is a pressure reducing relief valve located below the wrist and clamps control valve.

221-15A

PILOT FILTER - HIGH PRESSURE

HIGH PRESSURE FILTER This filter is placed ahead of the pilot supply valve to filter the pilot oil before it goes into the valve.

This filter incorporates a bypass indicator.

The bypass indicator consists of a clear plastic sight glass mounted on top of the filter housing.

Under normal operating conditions (or when the hydraulic system is shut down) the indicator will show GREEN. When a pressure differential of 72 psi. builds up inside the filter, the indicator will show RED indicating a clogged filter, .

This condition could happen during cold start-ups, but as the oil warms up the indicator will automatically re-set to GREEN. The indicator will not remain in the "clogged" (RED) position when the pilot system is not being used.

"Clogged" condition will result in low pilot pressure. If a loss of controls or slow response occurs, filter element may need to be changed.

5.3

This reducing/relieving valve is fully adjustable from 125 psi. to a maximum of 1500 psi. Turning the adjusting screw IN, increases the pressure setting. The correct setting is 425 psi.

IMPORTANT Contaminated hydraulic fluid can lead to premature failure of hydraulic components and costly repairs. Filters must be replaced at the recommended time intervals, See SECTION 3 in THIS MANUAL. Only Tigercat replacement filters must be used.

Do not substitute with other cheaper inferior brands. Tests have shown that Tigercat filters can have twice the filtering capacity as that of other name brands.

Tigercat 845B Feller Buncher 0-500 PSI GAUGE TEST PORT ON PILOT MANIFOLD 'P1' PORT

'P1' PORT/GAUGE TEST PORT

•

'T' TANK PORT

•

INLET PORT

PILOT SHUT OFF VALVE

Pilot system

•

• •

ACCUM. OPEN

•

CLAMP CLOSE

•

WRIST LEFT

•

ACCUM. CLOSED

•

CLAMP OPEN

•

WRIST RIGHT

•

SWING BRAKE

•

TRACK LOW

•

••

PILOT MANIFOLD

• PILOT SHUT OFF VALVE SOLENOID

••

'T' TANK CONNECTION

• 221-16A

PILOT MANIFOLD PILOT MANIFOLD

PILOT MANIFOLD

221-25A

The pilot manifold is located above the main control valve bank. Pilot oil enters the manifold at the inlet port and is then distributed to the various pilot functions of the machine.

The manifold distributes oil to the following circuits through the ports listed below: • • • • • • • • • • • • •

Joysticks (both) Drive pedals (both) Saw pilot valve Main pump L.S. control Pilot Accumulator LOW/DRIVE range Swing brake Wrist right Clamp arm open Accumulating arm close Wrist left Clamp arm close Accumulating arm open

(P2) pressure port (P2) pressure port (P2) pressure port (1) solenoid valve (2) solenoid valve (3) solenoid valve (4) solenoid valve (5) solenoid valve (6) solenoid valve (7) solenoid valve (8) solenoid valve

Pilot oil enters the manifold through the inlet port.

The pilot shut off valve controls the flow of oil to the three outlet pressure ports 'P2' and to the eight solenoid operated pilot valves. This valve is activated by pressing the pilot reset switch in cab (with the left armrest down).

Two outlet pressure ports 'P2' on each end of the manifold, feed the saw pilot valve, both joysticks, both drive foot pedals, and the main pump LS controller. A quick connect test port is teed into the "top" line to connect a pressure gauge to perform pressure setting procedures. The front facing 'P2' port charges the accumulator.

Eight solenoid operated pilot valves on the manifold, when energized, supply "on demand" pilot oil to the corresponding functions. These valves are activated by controls in the cab.

Two tank ports 'T' drain oil to the reservoir.

Pilot shut off valve The pilot shut off valve is mounted in the pilot manifold directly beside the inlet port. All pilot oil must flow through this valve before reaching any other control valve.

5.4

Tigercat 845B Feller Buncher

Pilot system

When this solenoid is energized (left armrest down and pilot reset switch momentarily pressed), pilot oil is supplied to the three 'P2' outlet ports and the eight solenoid valves on the pilot manifold. The swing brake will be released provided the cab switch is in the OFF position.

With regard to the swing brake, the brake will be applied if the swing brake switch in the cab has been left in the ON position. The swing brake will be released when the switch is in the OFF position. The accumulator will also be charged when the pilot shut-off valve is energized.

When the pilot shut-off valve is de-energized, (left armrest up) pilot oil is blocked to all pilot actuated functions on the joysticks and foot pedals as well as the saw and anti-stall. The swing brake is also applied at this time due to the lack of pilot pressure. The accumulator is drained at this time.

ACCUMULATOR

221-18A

ACCUMULATOR The accumulator is installed to ensure controls remain responsive by maintaining optimum pilot pressure. This prevents the pilot pressure from dropping when several functions are activated at the same time.

VALVE GUARD

•• • •

VALVE CAP

•

GAS VALVE

BODY

BLADDER

•• HYDRAULIC CONNECTION ACCU-1

••

•• POPPET (Seats against oil port after oil evacuation)

ACCUMULATOR (BLADDER TYPE)

The accumulator is a bladder type and is installed pre-charged to 325 psi. with nitrogen. The gas pressure in the pilot accumulator should be checked if the pilot system exhibits repeated and frequent charging cycles. Refer to CHECKING PRE-CHARGE PRESSURE in THIS SECTION.

5.5

Tigercat 845B Feller Buncher

Pilot system return spring (4). At the same time the regulating spool (2) is moved through the regulating spring (3). When the regulating stroke begins, there is a connection from port 'P' via hole (8) in the spool and work ports 1, 2, 3 or 4 in the base of the valve, to the boom valve pilot end caps.

Pilot pressure is directly proportional to the operator position of the joystick or foot pedal and the regulating spring characteristics.

PILOT SYSTEM ELECTRICAL CIRCUIT

RR-12

JOYSTICK PILOT VALVE

JOYSTICKS AND FOOT PEDALS These pilot valves are manually operated, directional control valves and operate on the same principle as a direct operating pressure reducing valve. Both the joystick and foot control valves (pedals) use similar spool arrangements.

Operated by hand or foot these valves direct pilot

•

•

5

• •

4 3

• •

•

2

•

1

•

Refer to circuit diagram; The pilot shut off valve solenoid is not energized until the LEFT armrest is down and the pilot reset switch is momentarily pressed. When this switch is pressed, the coil on the function lock-out relay is energized closing the circuit between wires 6 and 33. Wire 33 connects to the armrest switch.

When this switch is closed (armrest down) the coil on the pilot shut off valve is energized shifting the valve spool to supply oil to the pilot circuit. At the same time the wire from the armrest switch is connected back to the function lock-out relay coil through a diode and thus latches the function lock out relay in the energized position.

The diode in the circuit prevents the flow of current to the pilot shut off valve solenoid when the armrest switch is open (armrest up). Even if the pilot reset switch is held down, it will not operate. Whenever the arm is raised and the switch opens, the voltage is interrupted to the function lock-out relay coil and the relay contacts open resulting in the pilot shut off valve returning to the normally closed position. This prevents pilot oil from reaching the controls.

'P' PORT WORK PORTS 1, 2, 3 OR 4 AU013-2

SPOOL ARRANGEMENT

oil to the main control valve pilot end caps. The corresponding spool valve then shifts from its centre position and directs pump flow to operate a function.

OPERATING DESCRIPTION In the neutral position the joystick lever is held centered by return springs (4). When the lever (1) is operated, the plunger (5) is pushed against its 5.6

Tigercat 845B Feller Buncher

Pilot system

PILOT SYSTEM CIRCUIT DESCRIPTION Oil is supplied from the main pump 'P1' port to the two 'P' ports on the back of the main control valve.

From there the oil flows through the high pressure filter to the pilot supply valve. This pressure reducing/relieving valve allows oil to flow at 425 psi. to the inlet port of the pilot manifold.

The pilot manifold is a distribution center, directing pilot oil to all of the pilot operated functions on the machine. This distribution is achieved via three outlet 'P2' pressure ports and eight solenoid operated control valves. A pilot shut-off valve installed in the manifold controls the flow of pilot oil into the manifold.

When this pilot shut-off valve is energized, pilot oil is made available to the three 'P2' outlet pressure ports and the eight solenoid valves. When the valve is deenergized, pilot oil from the pilot supply valve is blocked, preventing pilot oil from entering the manifold, thereby rendering all pilot functions inactive. Refer to PILOT RESET in SECTION 2 of the OPERATOR’S MANUAL. One of the 'P2' outlet pressure ports distributes pilot oil to the load sense controller on the main pump and is used in conjunction with the anti stall system to destroke the pump when necessary to prevent the engine from stalling.

The second 'P2' outlet pressure port distributes pilot oil to the ‘P’ ports of both joysticks, both foot pedals and the saw solenoid pilot valve. A gauge test port is also tee'd into this line for use when setting the pilot system pressure. Movement of the joystick levers or the foot pedals will direct pilot oil from the ‘P’ ports of these valves to the pilot end caps of the main control valve to operate the various machine functions such as lifting the boom or driving the machine. A saw switch in the cab will energize the saw pilot valve which diverts pilot oil to shift the spool in the saw control valve and run the saw.

The third 'P2' outlet pressure port is connected to the pilot accumulator which is in place to maintain a constant pressure source (425 psi), ensuring that the controls remain responsive during heavy duty cycles.

The eight solenoid valves in the manifold, when energized by switches in the cab, will distribute pilot oil to; •

set the drive motors in either low or drive mode

•

release the swing brake

•

shift spools in the wrist/clamps control valve which will operate the wrist, accumulating arm and clamp arm cylinders.

5.7

Tigercat 845B Feller Buncher

845B-02

Pilot system

PILOT SYSTEM CIRCUIT DIAGRAM 5.8

Tigercat 845B Feller Buncher

Pilot system

SET PILOT PRESSURE

0-1000 PSI GAUGE TEST PORT ON PILOT MANIFOLD 'P1' PORT

1. With hydraulic oil at operating temperature, connect a 0-1000 psi. gauge to the gauge test fitting on the pilot manifold.

NOTE: The stand-by pressure of the main pump can vary from 400 psi to 600 psi. The anti-stall can cause the stand-by pressure to drop to 200 psi when the engine is running below 2200 rpm. Because the main pump is the original source of the pilot supply (via the main valve manifold), this will in turn affect the pilot supply.

PILOT MANIFOLD

•

2. Turn anti-stall switch OFF. 3. Loosen locknut and turn adjusting screw all the way OUT on pressure reducing/relieving valve, tighten locknut on adjusting screw.

4. Start engine and set throttle in IDLE position.

••

5. Have an assistant in the cab lower the armrest and momentarily press the pilot reset switch.

6. Loosen locknut on pilot supply valve and turn adjusting screw until pressure gauge at pilot manifold reads 250 psi.

221-16A

NOTE: Ensure that pilot pressure changes when adjusting screw is being turned. If pilot pressure does not change during this procedure, check the main pump stand-by pressure setting.

PILOT MANIFOLD

ADJUSTING SCREW

•

LOCKNUT

•

7. WITH SWING BRAKE ON, use left joystick to swing upper frame to raise system pressure.

Turn adjusting screw on pilot supply valve until gauge at pilot manifold reads 425 psi.

PILOT REDUCING/ RELIEVING VALVE CARTRIDGE

•

8. Stop engine, and remove pressure gauge.

221-14A

5.9

PILOT SUPPLY VALVE

Tigercat 845B Feller Buncher CHARGING THE ACCUMULATOR NOTE: A detailed instruction sheet is provided with the charging and testing device. The following is only a suggested guide.

•

Close the drain valve on the charging and testing device and connect the hose to the nitrogen bottle.

•

Remove the valve guard and cap.

•

Screw the charging and testing device onto the gas valve.

HOSE*

PRESSURE GAUGE*

Pilot system CHECKING THE PRE-CHARGE PRESSURE After the accumulator has been put in service, the pre-charge pressure should be checked with an accumulator charging and testing device.

Install the charging and testing device on the gas valve While depressing the button on the charging device, observe gas pressure reading on gauge. Refer to CHARGING THE ACCUMULATOR above for correct pressure.

If the gas pre-charge pressure is low, investigate the cause and correct it. Possible causes of lost pre-charge pressure include a leaking or damaged gas valve, or a damaged bladder.

ADAPTER* ADAPTER* NITROGEN BOTTLE

ACCUMULATOR

ASSEMBLY PART NO. 90254 INCLUDES PARTS SHOWN * ACCU-

CHARGING AND TESTING DEVICE

•

Open the gas shut-off valve on the nitrogen bottle and allow gas to flow slowly into the accumulator.

•

Close the shut-off valve frequently and check the value of the pre-charge by depressing the button on the charging device and observing the gauge.

•

If pre-charge pressure is high, lower it by opening the drain valve and carefully depressing the button on the charging device.

Pilot accumulator pre-charge - 325 psi NOTE: The pre-charge pressure will vary depending on the temperature. Once the desired pre-charge is reached, wait two minutes for the gas temperature to equalize. Re-check pre-charge and adjust if necessary.

•

Disconnect hose from nitrogen bottle.

•

Remove charging and testing device from accumulator and install valve cap and guard, torque to 175-350 lbf-ins.

•

Check to ensure there are no leaks, if the gas valve is leaking, it should be replaced. Use only valves approved for accumulator service.

NEVER USE AN AUTOMOTIVE TYPE VALVE.

5.10

Tigercat 845B Feller Buncher

SECTION 6 - ELECTRICAL, GAUGES AND ALARMS DECEMBER 2003

CONTENTS - SECTION 6 ELECTRICAL SCHEMATIC DIAGRAM (EARLIER MACHINES) ...... 6.2, 6.3, 6.4 ELECTRICAL SCHEMATIC DIAGRAM (LATER MACHINES) .......... 6.6, 6.7, 6.8 GAUGES AND ALARMS ................................................................................ 6.9 CHART ........................................................................................................ 6.9 SWITCH AND SENSOR LOCATIONS ................................................ 6.10, 6.11 WIRE COLOUR CODE CHART ....................................................................... 6.4

Tigercat 845B Feller Buncher

845B-03 (5604B 02)

Electrical, gauges and alarms

MACHINE SCHEMATIC DIAGRAM (EARLIER MACHINES) SHEET 1 OF 3 6.2

Tigercat 845B Feller Buncher

845B-04 (5604B 02)

Electrical, gauges and alarms

MACHINE SCHEMATIC DIAGRAM (EARLIER MACHINES) SHEET 2 OF 3 6.3

Tigercat 845B Feller Buncher

845B-05 (5604B 02)

Electrical, gauges and alarms

MACHINE SCHEMATIC DIAGRAM (EARLIER MACHINES) SHEET 3 OF 3

Tigercat wire colour code chart applicable to all products manufactured by Tigercat Industries Inc. COLOUR Red Black White Blue Purple Tan Yellow Grey Brown Green Orange

FUNCTION EXAMPLE Power ........................................ (protected and unprotected) Ground Engine control ........................... (fuel shut-off, start aid) Propulsion Control .................... (transmission/reverser solenoids) Monitor, electrical and mechanical systems ................. (air cleaner, alternator, wheel speed, engine speed) Electrical and electromechanical control ......... (park brake, alternator excitation) (power door motor, backup alarm) Monitors .................................... (flow, pressure, temperature, level) Standard monitor system .......... (logic module to monitor) Lights Electro-hydraulic control ........... (pilot solenoids) Accessories .............................. (horn, A/C, heater) 6.4

Tigercat 845B Feller Buncher

Electrical, gauges and alarms

6.5

Tigercat 845B Feller Buncher

845B-28 (14674B 02)

Electrical, gauges and alarms

MACHINE SCHEMATIC DIAGRAM (LATER MACHINES) SHEET 1 OF 3 6.6

Tigercat 845B Feller Buncher

845B-29 (14674B 02)

Electrical, gauges and alarms

MACHINE SCHEMATIC DIAGRAM (LATER MACHINES) SHEET 2 OF 3 6.7

Tigercat 845B Feller Buncher

845B-30 (14674B 02)

Electrical, gauges and alarms

MACHINE SCHEMATIC DIAGRAM (LATER MACHINES) SHEET 3 OF 3 6.8

Tigercat 845B Feller Buncher GAUGES AND ALARMS

Electrical, gauges and alarms

The 845B is monitored for proper operation by sensors/switches located in the hydraulic system and on the engine. These sensors are connected to either gauges, warning lights and alarms. A horn will also sound when the machine is travelling in reverse or when the engine enclosure roof door is being operated. A thumb switch on the left joystick (earlier machines) or a switch on the control panel (later machines) will sound the vehicle horn.

SENSOR FUNCTION

GAUGE RANGE

LIGHT

For a more complete description of the gauges and warning lights listed below, refer to SECTION 2 in the OPERATOR'S MANUAL.

HORN

TRIGGER OR RANGE INFO

Engine coolant temp. ........... 100°F - 280°F .... None ..... SOUNDS .... Operating range 190°F-215°F (88°C-102°C) (38°C) - (138°C)

@ 215°F (102°C)

Engine oil pressure ................. 0 - 100 psi....... None ..... SOUNDS ................... Stop engine below 15 psi @ 5 psi or lower*

Engine hours .............................. 0-9999 ......... None ......... None .............................. Engine running Hydraulic oil temp. ............... 100°F - 240°F .... None ..... SOUNDS ............ Stop machine above 185°F (85°C) (38°C) - (116°C)

@ 205°F (96°C)

Volts ......................................... 8v - 18v ........ None ......... None ............ Normal operating range 12-13.5 volts Fuel level ................................... 'E' - 'F' .......... None ......... None ................... Capacity (US gal/L): 210/795 Hydraulic oil - low ........................ None ............ ON .......... None ........................ 6 Gal. (27L) below Full Hydraulic oil -Very low ................ None ............ ON ...... SOUNDS .................... 12 Gal. (64L) below Full Hydraulic oil filter bypass ............ None ............ ON .......... None .......... Return filter restriction, 15 psi or greater Pump inlet ................................... None ............ ON .......... None .......... Pump inlet pressure drops below 1-2 psi Hydraulic oil tank pressure ....... 0 - 30 psi ........ None ......... None .............. Increase tank pressure below 3 psi Back-up alarm ................................ - ..................- ........ SOUNDS ........... One or both drive pedals in reverse Horn, safety alert ............................ - ..................- ........ SOUNDS .... Push button on L.H. joystick or control panel *NOTE: Horn will sound when key is in "RUN" position with engine "OFF" due too low oil pressure.

6.9

Tigercat 845B Feller Buncher PUMP INLET PRESSURE SWITCH (LIGHT)

POWER ROOF DOOR SOLENOID

Electrical, gauges and alarms

ENGINE START RELAY

•

•

BATTERY DISCONNECT SWITCH

ENGINE OIL PRESSURE SENDER (GAUGE)

ENGINE COOLANT TEMPERATURE SWITCH(HORN)

ENGINE OIL PRESSURE SWITCH (HORN AND HOUR METER GAUGE)

• •

• •

•

•

• • VIEW 'A' POWER ROOF DOOR PUMP/ MOTOR

HYDRAULIC OIL TANK

BATTERIES

VIEW 'B' HYDRAULIC OIL LEVEL SWITCHES (1;LIGHTS 2;HORN)

HYDRAULIC OIL HYDRAULIC OIL TEMPERATURE TEMPERATURE SENDER (GAUGE) SWITCH (HORN)

PUMP INLET PRESSURE SWITCH (LIGHT) ENGINE SPEED SENSOR

• • • •

•

BACK-UP ALARM (DRIVE PEDAL ACTIVATED)

•

Â

•

'A'

FUEL LEVEL SENDER (GAUGE)

FUEL TANK

•

• HYDRAULIC OIL FILTER BYPASS SWITCH (LIGHT)

• ENGINE OIL PRESSURE SWITCH (HORN AND HOUR METER GAUGE)

•

ENGINE COOLANT TEMPERATURE SENDER (GAUGE)

• •

Á'B'

• • FUEL TANK ENGINE OIL PRESSURE SENDER (GAUGE)

OPERATOR'S CAB

HORN (PUSH BUTTON ON L.H. JOYSTICK) 845B-06

ENGINE COOLANT LEVEL SWITCH (LIGHT AND HORN)

SWITCH AND SENSOR LOCATIONS (EARLIER MACHINES) 6.10

Tigercat 845B Feller Buncher

DOOR PUMP RELAY

ENGINE START SOLENOID RELAY

Electrical, gauges and alarms ENGINE OIL PRESSURE SENDER (GAUGE)

ENGINE COOLANT TEMPERATURE SWITCH(HORN)

BACK-UP FUEL SOLENOID ALARM (DRIVE PEDAL ACTIVATED)

ENGINE OIL PRESSURE SWITCH (HORN AND HOUR METER GAUGE)

•

•

•

•

• •

•

VIEW 'B' VIEW 'A' OIL LEVEL SIGHT GAUGE WITH LOW LEVEL SWITCH (WARNING LIGHT) 2ND. OIL LEVEL SIGHT GAUGE WITH TEMP. GAUGE AND "VERY LOW" WARNING SWITCH (PANEL HORN IN CAB)

HYDRAULIC OIL HYDRAULIC OIL TEMPERATURE TEMPERATURE SENDER (GAUGE) SWITCH (HORN)

•

ENGINE SPEED SENSOR

HYDRAULIC OIL TANK

PUMP INLET PRESSURE SWITCH (LIGHT) POWER ROOF DOOR PUMP/ MOTOR

• •

• •

•

FUEL LEVEL SENDER (GAUGE)

• •

•

FUEL TANK

•

Á

HYDRAULIC OIL FILTER BYPASS SWITCH (LIGHT)

'A'

ENGINE COOLANT TEMPERATURE SENDER (GAUGE)

•

•

•

•

•

ALTERNATOR

Á'B'

• BATTERIES

• FUEL TANK

BATTERY DISCONNECT SWITCH

OPERATOR'S CAB

A/C COMPRESSOR

HORN (SWITCH ON CONTROL PANEL) 845B-40

ENGINE COOLANT LEVEL SWITCH (LIGHT AND HORN)

SWITCH AND SENSOR LOCATIONS (LATER MACHINES) 6.11

Tigercat 845B Feller Buncher

Electrical, gauges and alarms

6.12

Tigercat 845B Feller Buncher

SECTION 7 - ENGINE START AND STOP JUNE 2003

CONTENTS - SECTION 7 CIRCUIT DESCRIPTION .................................................................................. 7.2 ENGINE START CIRCUIT ............................................................................... 7.2 SCHEMATIC DIAGRAM START CIRCUIT - AT REST ......................................................................... 7.3 START CIRCUIT - BATTERY DISCONNECT SWITCH 'ON' .......................... 7.3 START CIRCUIT - RUN ................................................................................ 7.4 START CIRCUIT - RUN, PILOT RESET SWITCH 'OFF' ................................ 7.5 START CIRCUIT - RUN, PILOT RESET SWITCH 'ON' .................................. 7.5 START CIRCUIT - START ............................................................................ 7.4

Tigercat 845B Feller Buncher

Engine start and stop

ENGINE START CIRCUIT

FUEL CONTROL VALVE SOLENOID

For detailed engine information, refer to the engine manufacturer's manual.

The engine normally installed on these Tigercat 845B machines is a Cummins Diesel 6CT8.3C. For engine starting and stopping procedures refer to STARTING ENGINE and STOPPING ENGINE in SECTION 2 of the OPERATOR’S MANUAL. For correct engine speeds, refer to THROTTLE CONTROL in SECTION 2 of the OPERATOR'S MANUAL. To start engine; Turn battery disconnect switch to the ON position. Turn ignition key to the START position and releasing it to the RUN position after the engine starts.

•

•• FUEL CONTROL VALVE 845B-D13

ENGINE FUEL CONTROL VALVE

START SOLENOID RELAY

DOOR PUMP RELAY

FUEL SOLENOID

CIRCUIT DESCRIPTION With the battery disconnect switch ON, current is supplied the start solenoid contact, the positive connection on the alternator and the BATTERY (BAT) contact of the key switch (ignition switch).

•

••

•

When the key switch is turned to the START (ST) position, the BATTERY (BAT) contact is connected to the START (ST) and RELAY (IGN) contacts of the key switch.

Current (voltage) then flows from the (IGN) contact through wire (2), a 15 amp circuit breaker, through RED wires (6) and (13) to energize the HOLD COIL of the fuel control valve solenoid. Current (voltage) also flows from the (ST) contact through wire (23) to energize the coil of the start relay.

The start relay contacts close and current flows from the 15 amp circuit breaker along RED wire (6) through the pilot function lockout relay, along TAN wires (9) and (16) to energize the coils of the start solenoid relay and the fuel solenoid. Energizing the start solenoid relay coil allows current to flow from the battery along RED wire (100) and TAN wire 12 to energize the start solenoid coil on the start motor to close the contacts and operate the start motor to start the engine.

Energizing the fuel solenoid coil allows current to flow from the battery along RED wire (100) and WHT wire (83) to the PULL COIL of the fuel control valve solenoid.

When the key switch is turned to the RUN position, the (BAT) contact remains connected to the (IGN) contact allowing current to continue to flow through RED wires (6) and (13) to the fuel control valve solenoid HOLD COIL and HOLD the fuel control valve OPEN to run the engine.

FUSIBLE LINKS 845B-D14

START AND FUEL SOLENOID RELAYS START RELAY

••

•

2 AMP IN-LINE FUSE HORSE POWER LIMITIMG CONTROL

RELAY PANEL the engine, the arm rest must be in the latched DOWN position to close the contacts of the pilot system limit switch. To energize the pilot system, PRESS and HOLD the pilot reset switch, this will energize the pilot function lockout relay, close the 845B-D15

contacts and allow current to flow through wires RED (6) and TAN (33) to energize the pilot shut off solenoid valve on the pilot manifold.

When the pilot reset switch is released current will continue to flow through wire TAN (95) and the diode to latch the pilot function lockout relay in the Turn the key switch to the OFF position and current is energized position and allow current to flow through removed from the (IGN) contact and RED wires (6) and wires RED (6) and TAN (33) to the pilot shut off (13) to the fuel control valve HOLD COIL and stop the solenoid valve. engine.

For additional information on the PILOT SYSTEM In order to operate the machine functions after starting refer to SECTION 5 in THIS SERVICE MANUAL.

7.2

Tigercat 845B Feller Buncher

Engine start and stop

START CIRCUIT - AT REST

845B-34

START CIRCUIT - AT REST BATTERY DISCONNECT SWITCH - ON

845B-35

7.3

Tigercat 845B Feller Buncher

Engine start and stop

START CIRCUIT - START IGNITION KEY - START POSITION

845B-36

START CIRCUIT - RUN IGNITION KEY - RUN POSITION

845B-37

7.4

Tigercat 845B Feller Buncher

Engine start and stop

START CIRCUIT - RUN IGNITION KEY - RUN POSITION PILOT RESET SWITCH - HELD ON ARM REST DOWN/ARM REST SWITCH - ON

845B-38

START CIRCUIT - RUN IGNITION KEY - RUN POSITION PILOT RESET SWITCH - RELEASED ARM REST DOWN/ARM REST SWITCH - ON

845B-39

7.5

Tigercat 845B Feller Buncher

Engine start and stop

7.6

Tigercat 845B Feller Buncher

SECTION 9 - ENGINE ANTI-STALL JUNE 2003

CONTENTS - SECTION 9 CONTROL MODULE IN CAB .......................................................................... 9.2 CONTROL MODULE PIN CONNECTIONS ...................................................... 9.4 ENGINE ANTI-STALL CURVE ......................................................................... 9.4 FAULT FINDING PROCEDURE ~ ANTI-STALL QUICK CHECK ...................... 9.5 FAULT FINDING PROCEDURES, ADDITIONAL ............................................. 9.6 HORSEPOWER LIMITING CONTROL ............................................................ 9.2 GENERAL DESCRIPTION ........................................................................... 9.2 LOAD SENSE; SET MARGIN PRESSURE .............................. SEE SECTION 4 MAIN PUMP CONTROLLER (LS CONTROL) .................................................. 9.2 PILOT PRESSURE, SET .......................................................... SEE SECTION 5 SCHEMATIC DIAGRAMS ENGINE ANTI-STALL CIRCUIT DIAGRAM ................................................... 9.5 LOAD SENSING SYSTEM CIRCUIT DIAGRAM ........................................... 9.3 SPEED SENSOR, ADJUSTING ...................................................................... 9.4 SPEED SENSOR ON ENGINE ....................................................................... 9.2 VERIFY ANTI-STALL SETTING ................................................ SEE SECTION 4

SEE ALSO SECTION 4

Tigercat 845B Feller Buncher

Engine anti-stall

HORSEPOWER LIMITING CONTROL

ENGINE ANTI-STALL SOLENOID VALVE

• •

HORSEPOWER CALIBRATION DO NOT ADJUST

GENERAL DESCRIPTION In the past it was common to lug an engine down when several functions with high loads were used at the same time and engine stalling was avoided only by the operator. In order to prevent engine over loading, the Tigercat machine is equipped with an electronic system which detects any drop in engine speed and de-strokes the main pump to reduce engine load and thus maintain engine speed. This is done without any input from the operator and in most cases he will be unaware of the operation of this system.

GAUGE TEST PORT 'X1' ANTI-STALL SIGNAL PRESSURE GAUGE TEST PORT 'L.S.'

••

A speed sensor mounted on the back of the engine above the flywheel (Cummins).

•

A solenoid valve mounted on the main pump.

•

A wiring harness.

CONTROL MODULE

•• WIRING HARNESS WITH 25 PIN CONNECTOR

• 251-10

822-D65

••

MAIN MAIN PUMP PUMP

••

••

TANK PORT

SOLENOID VALVE

••

••

A control module mounted on the rear wall of the cab interior.

•

••

•• ••

A Linde system is used and incorporates the following components: •

PILOT SUPPLY 'P1'PORT WITH OIL FILTER

LOAD SENSE PRESS. PORT

MARGIN PRESSURE ADJUSTING SCREW

MAIN PUMP CONTROLLER (LS CONTROL)

The standard Linde system also uses a throttle position sensor but since this machine is intended to be operated with the engine at FULL rpm., the throttle position sensor is not required. The horsepower control can be turned off when required for maintenance work by switching the anti-stall switch in the cab to the OFF position, the engine may then be used at less than FULL throttle. During normal operation of this machine the engine throttle control should pulled completely OUT (FULL throttle) and the anti-stall switch should be in the ON position.

The control module in the cab receives and distributes signals through a 25 pin connector which is attached to the wiring harness. The control module is protected from power surges by a 2 amp in-line fuse.

••

START RELAY

•

CONTROL MODULE IN CAB

ENGINE SPEED SENSOR 2 AMP IN-LINE FUSE HORSE POWER LIMITIMG CONTROL

••

105-2

845B-D15

SPEED SENSOR ON ENGINE 9.2

RELAY PANEL

••

Tigercat 845B Feller Buncher

845B-01

Engine anti-stall

LOAD SENSING SYSTEM CIRCUIT DIAGRAM 9.3

Tigercat 845B Feller Buncher CONTROL MODULE PIN CONNECTIONS

Engine anti-stall ADJUSTING SPEED SENSOR

Refer to Engine anti-stall circuit diagram;

1. Stop engine.

•

Pin 1 is connected to "power" through a 2 amp fuse.

2. Loosen locknut on speed sensor.

•

Pin 13 is connected to ground.

3. Screw speed sensor IN until it touches fly wheel.

•

Pin 6 jump wire connected to pin 17.

4. Turn speed sensor OUT one full turn.

•

Pin 18 jump wire connected to pin 20.

5. Tighten locknut.

•

Pins 12 and 14 are connected to the speed sensor mounted on the flywheel housing.

•

Pin 16 is connected to the anti-stall valve solenoid.

NOTE : Before welding anywhere on the machine the 25 pin connector should be disconnected from the control module.

•

Pin 11 is connected to the pole terminal '5B' on the anti-stall switch. When this switch is ON pin 11 will be connected to the anti-stall valve solenoid through the switch.

The system control module constantly monitors the engine speed, any drop in RPM from 2100* or 2200* will result in a signal being sent to the main pump solenoid via wires 91, 92 and 82 from pins 11 and 16. This signal causes the solenoid valve to shift and direct pressure from the pilot system to shift the displacement control valve causing the pump to de-stroke lightening the load on the engine without affecting engine speed. This electrical signal is a pulse width modulated signal which provides for precise modulation of the hydraulic valve and the resulting smooth control of the main pump displacement. *NOTE: 2200 RPM with earlier module AX087 or 2100 RPM later module AX159.

X1-XLS

RPM 2260 2212 2198 2182 2168 2155 2152 2133 2112 2098 2064 2062 2041 2018 2014 1961 1785

Machine 845-0101

X1* (psi) 350 0 6 300 This Reading ± 50 psi 7 40 250 78 200 Horsepower Limiting 115 Controller 120 150 175 240 100 275 310 50 These readings 310 0-15 psi 310 0 1700 1800 1900 2000 2100 2200 2300 2400 310 RPM 315 PRESSURE INCREASES FROM 0 - 310 PSI (APPROX.) 315 WITHIN A RANGE OF APPROX. 100 RPM. 315 ENGINE ANTI-STALL CURVE ~ ENGINE RPM VS. PSI "X1" (psi)

* This value may vary by as much as ± 20psi from one machine to another.

Do not try to adjust pressure.

This table is for reference purposes only.

9.4

Tigercat 845B Feller Buncher FAULT FINDING ~ ANTI-STALL QUICK CHECK

Engine anti-stall B. ANTI-STALL OFF 1. Connect a 0-1000 psi gauge to the ‘X1’ gauge test port on the main pump regulator.

The following is a quick procedure to determine if the anti-stall is functioning properly. If the machine fails any of these tests, then a more detailed diagnosis is necessary. However, there can still be other problems that are not related to the anti-stall system which are being masked.

2. Start engine.

3. Place anti-stall switch in the OFF position.

4. Activate each function 1 at a time.

Expected Results: • All functions should operate normally.

IMPORTANT: Always ensure that the hydraulic oil is at operating temperature when performing all of the following diagnosis.

•

X1 pressure should be less than 20 psi.

C. ANTI-STALL ON, THROTTLE MINIMUM 1. Connect a 0-1000 psi gauge to the ‘X1’ gauge test port on the main pump regulator.

A. WHEN DOES THE PROBLEM OCCUR ?

Does the problem occur with the anti-stall ON or OFF? ANSWERS: • Occurs with the system ON or OFF The problem is likely hydraulic related. This also includes the anti-stall (VD3) solenoid valve on the main pump.

2. Start engine and place throttle in MINIMUM position.

•

Expected Results: • Boom up function should be inactive (boom will not lift)

3. Place anti-stall switch in the ON position.

4. Fully activate MAIN BOOM UP function.

Occurs only with the system ON. The problem is either related to the hydraulic system, the engine, or the anti-stall system.

•

845B-22

X1 pressure should be greater than 320 psi.

ENGINE ANTI-STALL CIRCUIT DIAGRAM 9.5

Tigercat 845B Feller Buncher D. ANTI-STALL ON, THROTTLE MAXIMUM 1. Connect a 0-1000 psi gauge to the ‘X1’ gauge test port on the main pump regulator.

2. Start engine and place throttle in MAXIMUM position.

3. Place anti-stall switch in the ON position.

4. Fully activate MAIN BOOM UP function.

Engine anti-stall ADDITIONAL FAULT FINDING PROCEDURES The following procedures can be used to diagnose the anti-stall system. They are not in any particular order and should be done if addition diagnoses is required.

A. ENGINE FULL SPEED 1. Place reflector on engine crank shaft pulley for phototach.

Expected Results: • Boom up function should operate normally.

2. Start engine and place throttle in maximum position.

•

3. Measure engine no load maximum speed with a phototach.

X1 pressure should be less than 20 psi.

E. BEGIN OF MOVEMENT 1. Start engine and place throttle in MINIMUM position.

2. Place anti-stall switch in the ON position.

3. Fully activate MAIN BOOM UP function.

(Initially, the boom should not move) 4. Increase the throttle until the boom begins to lift.

5. Measure the engine speed when the boom starts to lift. The transition state of the anti-stall system from fully active to completely inactive is very narrow. It is necessary to approach this point very slowly.

The engine speed should be verified with a phototach and the measured speed should be compared to the panel tach if one is installed.

B. ENGINE POWER NOTE: Before performing this procedure make sure that all relevant PRESSURES and SPEEDS have been set correctly. E.G: SWING SPEED AND SWING PRESSURE SETTINGS; MAIN SYSTEM PRESSURE; CLAMP VALVE MAIN RELIEF. Refer to the appropriate sections in THIS SERVICE MANUAL for THESE PROCEDURES. 1. Place reflector on engine crank shaft pulley.

Expected Results: • The boom should not move initially.

•

As the engine speed approaches full speed, the boom should begin to move.

`

The point where the boom begins to move should be between;

2. Start engine and place throttle in maximum position 3. Place anti-stall switch in the OFF position.

4. Place swing brake in the ON position.

5. Activate the SWING function fully.

• Measure the engine speed.

2050 to 2150 RPM with earlier module AX087 or 1950 to 2050 RPM later module AX159.

6. Activate the SWING function fully.

Bottom the TILT cylinder.

• Measure the engine speed.

7. Activate the SWING function fully.

Hold a CLAMP function over relief.

• Measure the engine speed.

8. Activate the SWING function fully.

Bottom the TILT cylinder.

Hold a CLAMP function over relief.

• Measure the engine speed.

9.6

Tigercat 845B Feller Buncher

Engine anti-stall

C. PILOT PRESSURE. 1. Ensure pilot pressure is correct.

H. SPEED SENSOR OUTPUT 1. Remove connector from anti-stall control module.

To verify PILOT PRESSURE refer to PILOT SYSTEM in SECTION 5 of THIS MANUAL.

2. Start engine and place throttle in maximum position.

D. MARGIN PRESSURE 1. Ensure margin pressure is correct.

3. Measure the AC voltage across pins 12 and 14 or pins 13 and 14 on connector.

• The speed sensor output should be greater than 5VAC.

To verify MARGIN PRESSURE refer to HYDRAULIC SYSTEM in SECTION 4 of THIS MANUAL.

The speed sensor is non adjustable on the John Deere 6076 and 6081 engines (853 and 860). The speed sensor on the Cummins C engine (845/845B) should be a fixed distance from the flywheel. Do not use the voltage to adjust this distance.

Refer to INSTALL OR ADJUST SPEED SENSOR in THIS SECTION.

E. ELECTRICAL POWER TO ANTI-STALL CONTROL MODULE. 1. Remove connector from anti-stall control module.

2. Start engine.

3. Measure DC voltage across pins 1 and 13 on connector.

• The electrical power should be 13 ±2VDC F.

I.

SPEED SENSOR WIRES 1. Remove connector from anti-stall control module.

SOLENOID VALVE WIRES. 1. Remove connector from anti-stall control module.

2. Measure resistance between pins 12 and 14 or pins 13 and 14 on connector • The resistance should be:

2. Measure resistance between pins 11 and 16 on connector.

• The resistance should be 6.6 ±2 ohms

960 ±150ohms ...... Tigercat model 845/845B; Cummins 'C' engine.

3000 ±300 ohms ... Tigercat model 853; 860; John Deere 6076, 6081.

3. Check for shorts to chassis.

3. Check for shorts from pin 14 to chassis.

(Pin 12 or 13 is connected to ground)

G. SOLENOID VALVE COIL 1. Remove DIN connector from anti-stall (VD3) solenoid valve.

J. SPEED SENSOR COIL 1. Remove connector from anti-stall control module.

2. Measure resistance of solenoid coil.

• The resistance should be 6.6 ±2 ohms.

2. Measure resistance of speed sensor coil.

• The resistance should be: 960 ±150 ohms ..... Tigercat model 845/845B; Cummins 'C' engine.

3000 ±300 ohms ... Tigercat model 853; 860; John Deere 6076, 6081.

9.7

Tigercat 845B Feller Buncher

Engine anti-stall

9.8

Tigercat 845B Feller Buncher

SECTION 11 - TRACK DRIVE CONTENTS - SECTION 11 DRIVE COMPONENTS, ASSEMBLY .......................................................... 11.2 DRIVE MOTOR BRAKE CIRCUIT DESCRIPTION ............................................................ 11.7 DESCRIPTION ......................................................................................... 11.5 SET MOTOR MAXIMUM DISPL............................................................. 11.18 START-UP PROCEDURE ........................................................................ 11.8 DRIVE MOTOR AND GEARBOX ASSEMBLY ........................................... 11.3 HYDROSTATIC DRIVE SYSTEM ............................................................... 11.2 PRESSURE SETTINGS, DRIVE SYSTEM ................................................ 11.12 BEGIN OF REGULATION, SET, FOR DRIVE MOTOR AQ019 ............. 11.15 BRAKE RELEASE PRESSURE ON DRIVE MOTOR AQ019 ................. 11.15 CROSSOVER RELIEF VALVES FOR DRIVE MOTOR AQ007 ............. 11.12 CROSSOVER RELIEF VALVES, FOR DRIVE MOTOR AQ019 ............ 11.14 DRIVE SPEED CHANGE VALVE, FOR DRIVE MOTOR AQ007 ........... 11.13 SCHEMATIC DIAGRAMS DRIVE CIRCUIT DIAGRAM WITH AQ007 MOTOR .............................. 11.10 DRIVE CIRCUIT DIAGRAM WITH AQ019 MOTOR .............................. 11.11 DRIVE MOTOR (AQ007) ................................................................ 11.4, 11.7 DRIVE MOTOR (AQ019) ................................................................ 11.4, 11.6 TRACK COMPONENTS BOTTOM ROLLER RETAINING BOLTS ............................................... 11.24 IMPORTANT TRACK DRIVE NOTES ...................................................... 11.2 NEW MACHINE .................................................................................... 11.2 STRAIGHT TRAVEL ............................................................................. 11.2 TRACK SAG ......................................................................................... 11.2 MEASURING TRACK SAG .................................................................... 11.22 TRACK SAG ADJUSTMENT .............................................................. 11.23 OPERATING THE MACHINE ................................................................. 11.22 TORQUING UNDERCARRIAGE BOLTS ............................................... 11.23 TRACK SHOE RETAINING BOLTS ....................................................... 11.23 WEAR LIMITS BOTTOM ROLLER WEAR ................................................................. 11.25 BUSHING WEAR, OUTSIDE DIAMETER .......................................... 11.25 IDLER WEAR ...................................................................................... 11.26 PIN AND BUSHING WEAR ................................................................ 11.25 TRACK LINK WEAR ........................................................................... 11.24 TRACK SHOE GROUSER HEIGHT WEAR ....................................... 11.24 TRACK SLIDE WEAR ......................................................................... 11.26 TRACK DRIVE NOTES, IMPORTANT NEW MACHINE ........................................................................................ 11.2 STRAIGHT TRAVEL ................................................................................ 11.2 TRACK SAG ............................................................................................. 11.2 TRACK SPEED SET-UP ADJUSTMENTS SEQUENCE ................................................................ 11.16 SET MOTOR MAXIMUM DISPLACEMENT ........................................... 11.18 SET TRACK SPEED .............................................................................. 11.17 FAST FORWARD (MOTOR MIN. DISPL.) .......................................... 11.20 FAST REVERSE (VALVE FLOW SETTING) ...................................... 11.20 LEFT TRACK ADJUSTMENT ............................................................. 11.17 MOTOR MAXIMUM DISPLACEMENT ............................................... 11.18 RIGHT TRACK ADJUSTMENT ........................................................... 11.21 SLOW FORWARD (VALVE FLOW SETTING) ................................... 11.19

DECEMBER 2003

Tigercat 845B Feller Buncher IMPORTANT TRACK DRIVE NOTES

Track drive STRAIGHT TRAVEL

NEW MACHINE

If the machine does not travel straight, the right and left track speeds are not set the same. Refer to TRACK SPEED SET-UP PROCEDURE in THIS SECTION. Be sure to follow the correct procedure for the machine serial number.

Before driving a new machine ensure that track sag is set correctly. Track sag may be set less than specified for shipping purposes. The correct track sag must be adjusted once a machine has been delivered to the job sight and operating in the accumulated soil buildup in the undercarriage.

Check speeds of each track and follow the set-up procedures closely to obtain straight travel.

TRACK SAG

HYDROSTATIC DRIVE SYSTEM

The track sag dimension is very important and should be checked regularly. A 50% increase in the life of the track assembly can be realized, particularly in bushing O/D wear and 'track pitch' by maintaining the correct amount of track sag. A track that is too tight will wear out significantly faster due to increased tension in the chain.

Refer to MEASURING TRACK SAG in THIS SECTION.

The hydrostatic drive system is part of the main hydraulic system utilizing a variable displacement piston pump (main pump) with load sensing and Horse Power (anti-stall) limiting control along with two pressure and flow compensated valve sections on the main Linde valve manifold.

A variable displacement swash plate piston motor transmits power to the tracks through a triple reduction planetary gearbox on each track frame.

Each planetary gearbox is completely housed within the width of the track shoes. The

It is also recommended to verify that the track sag is correct BEFORE performing any track drive hydraulic set-up procedures.

TRACK SLIDES (OR ROLLERS)

ROTARY MANIFOLD IDLER ASSEMBLY

•

• UNDERCARRIAGE LOWER HINGED ACCESS COVER

• UNDERCARRIAGE

•

•

•

•

• •

INSPECTION COVERS

•

•

DRIVE MOTOR

•

TRACK DRIVE GEARBOX DRIVE SPROCKET

845B-07

LOWER ROLLERS

•

• TRACK ASSEMBLY

TRACK DRIVE ASSEMBLY 11.2

TRACK ACCESS COVER

Tigercat 845B Feller Buncher

Track drive

gearboxes include wet, multiple-disc, springapply, hydraulic-release brakes which automatically release when the applicable drive pedal is pressed in either the FORWARD or REVERSE direction and apply when when the pedal(s) are released. Each LEFT and RIGHT

R.H. TRACK DRIVE

MAIN BOOM CYLINDERS

SWING

drive pedal controls the LEFT or RIGHT track drive. Independent control of each track permits counter rotation.

Refer to SECTION 4 in THIS MANUAL for a complete description of the MAIN HYDRAULIC SYSTEM.

L.H. TRACK DRIVE

TILT CYLINDER

• •

•

HIGH PRESSURE LIMITING CONTROL

STICK CYLINDER CONTROL VALVE MANIFOLD

• •

•

•

•

MAIN LINDE CONTROL

101-1

TRACK SPROCKET

PLANETARY TRACK DRIVE GEARBOX

•

••

LOWER FRAME

•

TRACK DRIVE MOTOR (AQ019 SHOWN)

• ••

BRAKE ASSEMBLY

BK004-822

TRACK DRIVE MOTOR AND GEARBOX ASSEMBLY 11.3

Tigercat 845B Feller Buncher

Track drive The valve will remain in the closed position as long as there is no oil pressure in the line from the main control valve. When the main control valve spool is shifted and oil flows to the motor, a check valve in the counterbalance valve (G) (Refer to motor schematic) opens and oil pressure builds up behind the motor pistons.

Two variations of track motor have been used on production runs of the 845B; an earlier design identified by part number AQ007 and a later design AQ019. When necessary these two part numbers will be used in the following writeups to differentiate between the two motors.

In order to control the vehicle movement in situations where the vehicle may roll down a grade, each motor is equipped with a counterbalance valve. These valves have a spool valve which controls the flow of oil out of the motor, See motor schematic diagram, it is shown in the centre, closed position.

The motor cannot move until the oil pressure shifts the counterbalance spool to permit the oil on the low pressure side of the motor to flow back through the counterbalance valve to the main control valve and then to tank.

MOTOR SCHEMATIC (AQ007)

845-25

BEGIN OF REGULATION ADJUSTMENT

MINIMUM DISPLACEMENT ADJUSTMENT STOP 'A'

PRESSURE REGULATOR VALVE BLOCK

•

845B-24

CROSSOVER RELIEF VALVES 'B'

CYLINDER BLOCK 'J'

COVER 'L'

MIN. AND MAX. ADJUSTING STOPS 'A' & 'E'

•

BEARING SHELL 'R'

••

•

•

PRESSURE REGULATOR VALVE BLOCK

PISTON 'I' SWASHPLATE 'E'

• •

• •

MOTOR SCHEMATIC (AQ019)

•

'B' PORT

••

• 'A' PORT

•

'A' BRAKE RELEASE PRESSURE REDUCING VALVE ADJUSTMENT

AQ019

•• SHAFT 'A'

•

'A'

MAXIMUM DISPLACEMENT ADJUSTMENT STOP 'E'

••

SLIPPER 'F' TUBE

COUNTERBALANCE VALVE

DRIVE MOTOR FRONT COVER (AQ019)

• PRESSURE PORTS

CROSS SECTION 'A' 'A' DRIVE MOTOR (AQ019) 11.4

Tigercat 845B Feller Buncher

Track drive

DRIVE MOTOR DESCRIPTION (AQ007) Refer to motor cross section illustrations;

The drive motor is a variable displacement swashplate design. The motor is interchangeable from side to side.

The following description is for an AQ007 drive motor. It will also apply to the AQ019 drive motor except for some minor discrepancies with regard to the location of the adjusting screws.

The motor rotating group consists of a cylinder block (J) with nine pistons (I) and an output shaft (A) that is splined to the cylinder block.

SLIPPER

RETAINER

BALL GUIDE

G

F

Supply oil from the drive control valve enters the PISTON

CYLINDER BLOCK

I

H

J

SWASHPLATE

K PIN

E SEAL

L MAXIMUM

DISPLACEMENT PISTON MINIMUM DISPLACEMENT ADJUSTMENT STOP

D

SPACER

••

C RETAINING RING

•

• ••

B

••

•

•

•

•

•

•

••

M SHIMS N COVER

• SHAFT

•

•

MAXIMUM DISPLACEMENT ADJUSTMENT STOP

•

•

•

A

WEAR SLEEVE

•

•

S AQ007-2

BEARING SHELL

R

CROSS SECTION OF DRIVE MOTOR (AQ007)

PIN Q SPRING

P

O MINIMUM DISPLACEMENT PISTON

G COUNTERBALANCE VALVE SUPPLY SHUTTLE F VALVE

• K DRIVE SPEED

DRIVE SPEED CHANGE VALVE

•

CHANGE ORIFICE

H

MINIMUM DISPLACEMENT

A ADJUSTMENT

STOP 6mm ALLEN KEY 19mm WRENCH

•

•

• E

CROSSOVER RELIEF VALVE

'A' PORT

MAXIMUM DISPLACEMENT ADJUSTMENT STOP 6mm ALLEN KEY 19mm WRENCH

'B' PORT

B

FLUSHING ORIFICE

•

I

• •

• •

J EDGE FILTER AND PRESSURE REDUCING VALVE ORIFICE AQ007-1

DRIVE MOTOR FRONT COVER (AQ007) L DRIVE MOTOR COVER

SHUTTLE

C VALVE

•

• 11.5

D

DRIVE BRAKE RELEASE PRESSURE REDUCING VALVE

Tigercat 845B Feller Buncher

Track drive displacement, the minimum displacement piston contacts the maximum displacement adjustment stop.

Refer to front cover diagrams; The drive motor cover (L) consists of several components to operate the drive functions and regulate the release of drive brakes.

The minimum displacement adjustment stop (A) limits the minimum angle the swashplate can move. The maximum displacement adjustment stop (E) limits the maximum angle the swashplate can move. The crossover relief valve(s) (B) protects the motor circuit from pressure spikes.

845B-24

MOTOR SCHEMATIC (AQ019)

motor through the cover (N) to the pistons.

During operation, high pressure supply oil enters the piston bores in the cylinder block (J). This forces the pistons against an angled swashplate (E). Piston sliding action causes the rotating group to turn. The cylinder block is splined to the output shaft (A) which causes the output shaft to turn. During the second half of the motor rotation, low pressure is discharged as the pistons ride up to a higher position on the swashplate. To reverse rotation, oil flow is reversed. During operation a small amount of supply oil flows through the centre of each piston. This oil lubricates the piston to slipper (F) joint and the slipper to swashplate area.

High pressure supply oil also flows through a tube to lubricate the swashplate to bearing shell area.

Normal leakage and lubrication oil aid in flushing and cooling the motor during drive operation.

The swashplate (E) angle is changed by the minimum displacement piston (O) and maximum displacement piston (L). When supply oil acts on the minimum displacement piston (O), the motor runs at its highest speed. When supply oil acts on the maximum displacement piston, the motor runs at its slowest speed. The maximum displacement piston is larger than the minimum piston and will hold the motor in maximum displacement when equal pressure acts on both pistons.

The shuttle valve (C) (AQ007 only) slides back and forth, depending on direction of travel, to route supply oil to the crossover relief valve (B) and minimum displacement piston. The shuttle valve moves only when a drive function is actuated.

MAXIMUM DISPLACEMENT ADJUSTING STOP

CROSSOVER RELIEF VALVE

• • MINIMUM DISPLACEMENT ADJUSTING STOP

• •

COUNTERBALANCE VALVE

183-25

DRIVE MOTOR (AQ007) - LEFT SIDE SHOWN CROSSOVER RELIEF VALVES

COUNTERBALANCE VALVE

MINIMUM DISPLACEMENT ADJUSTING STOP

••

••

••

• •

NOTE: Swashplate angle (motor displacement) is limited by the minimum and maximum displacement pistons contacting the minimum and maximum displacement adjustment stops. For minimum displacement, the maximum displacement piston contacts the minimum displacement adjustment stop. For maximum

845B-D39

MAXIMUM DISPLACEMENT ADJUSTING STOP

DRIVE MOTOR (AQ019) - LEFT SIDE SHOWN

11.6

Tigercat 845B Feller Buncher

Track drive The drive speed change orifice (K) (AQ007 only) is located in the passage from the drive speed change valve to the maximum displacement piston. The orifice is used to dampen pressure fluctuation. To access the orifice, remove the plug in the face of the cover.

845-25

MOTOR SCHEMATIC (AQ007)

BRAKE CIRCUIT DESCRIPTION Refer to motor front cover illustrations and motor schematic diagrams Oil pressure from line 'A' or 'B' enters the motor and passes through supply shuttle valve 'F' and enters brake release pressure reducing valve 'D'.

The pressure reducing valve output is adjustable.

In this particular application it is limited to 500 psi., whenever 'A' or 'B' line pressure is above 500 psi. or 'A' or 'B' line pressure below 500 psi. The brake is fully released by 250 psi. and the maximum pressure the brake can stand without failure is 725 psi. The time required for the brake to release is approximately 1 second and 3 seconds to apply.

The drive brake release pressure reducing valve (D) reduces the higher supply pressure to the lower pressure used to release the drive brake.

The supply pressure comes from the supply shuttle valve (F) when a drive function is actuated.

The edge filter and pressure reducing valve orifice (J) are located in the passage from the supply shuttle valve (F) to the drive brake release pressure reducing valve (D). The edge filter and orifice are accessible by removing the plug in the face of the cover (AQ007 only). The edge filter is used to break up small particles in the oil so they flow through the orifice. The orifice causes a pressure drop in supply oil flow to the reducing valve and dampens pressure oil fluctuation.

The flushing orifice (long type) (I) (AQ007 only) is located in the brake circuit to motor case passage. The orifice is accessible by removing the plug in the face of the cover. The orifice provides a passage for oil flow from the brake circuit to the motor case for cooling and flushing during drive operation. When the oil is cold the flow of oil is restricted by the long type orifice to prevent an excessive build up of pressure in the drive motor case. The orifice also provides a passage to release any residual pressure from the brake circuit to the motor case when not driving.

BOTH MOTORS The drive motor may be operated in two ranges; AQ007, MAXIMUM DISPLACEMENT = 90cc/rev.

MINIMUM DISPLACEMENT = app. 42cc/rev.

AQ019, MAXIMUM DISPLACEMENT = 105cc/rev.

MINIMUM DISPLACEMENT = app. 50cc/rev.

These two ranges are controlled by a solenoid pilot valve on the pilot manifold which is operated by the TRACK (LOW/DRIVE) switch in the cab.

In the LOW position the solenoid on the pilot valve is energized and the motor is in its maximum displacement mode which will give the slowest speed and maximum tractive effort.

For faster travelling modes the TRACK (LOW/ DRIVE) switch can be put in the DRIVE position and the motor will be in its minimum displacement position which will give the fastest speed. When in this high speed mode the motor will automatically de-stroke in the event that a high load is encountered, e.g. a short grade or obstacle. This destroking is controlled by the drive speed change valve. This valve controls the hydraulic pressure signal to the maximum displacement piston. The piston shifts the motor to maximum displacement when the supply oil pressure in the motor is above the drive speed change valve pressure setting.

The drive speed change valve (H) routes supply oil to the maximum displacement piston to keep the drive motor in the lowest speed. On drive motor AQ019 a servo pressure reducing valve controls the pressure of the supply oil entering the drive speed change valve at 2000 psi. maximum.

11.7

Tigercat 845B Feller Buncher DRIVE MOTOR START-UP PROCEDURE

Track drive 5. Fill motor with oil through the drain port. Add oil slowly until level is to the top of drain port.

IMPORTANT: The drive motor will be damaged if is not filled with oil before operating the drive function. This procedure must be performed whenever a new drive motor or drive pump is installed or whenever oil has been drained from the motor.

6. Tighten valve body or plug removed in step 4.

FOR DRIVE MOTOR AQ007, Refer Fig. 99-2

9. Check that the brake release pressure has not changed.

7. Re-connect drain line.

8. Run each drive motor slowly with track off the ground for three track revolutions to remove air from the drive circuit.

1. Disconnect drive motor drain line.

2. Install plug in line to minimize loss of oil.

3. Remove port adapter from motor drain port.

4. To let air escape, loosen the valve body for drive brake reducing valve (left track) or the plug for drive speed change valve (right track) one turn. Valves are next to the drain hose connection. Do not turn the locknut or adjusting screw for the drive brake reducing valve.

MOTOR DRAIN LINE (BEHIND) DRIVE SPEED CHANGE VALVE

SUPPLY SHUTTLE VALVE

COUNTERBALANCE VALVE

DRIVE SPEED CHANGE ORIFICE

••

• •

••

CROSSOVER RELIEF VALVE

• ••

•• DRIVE BRAKE RELEASE PRESSURE REDUCING VALVE

EDGE FILTER AND PRESSURE REDUCING VALVE ORIFICE

99-2

6mm ALLEN KEY 19mm WRENCH

••

MAXIMUM DISPLACEMENT ADJUSTMENT STOP 6mm ALLEN KEY 19mm WRENCH

MINIMUM DISPLACEMENT ADJUSTMENT STOP

DRIVE MOTOR (AQ007) - R.H. SIDE SHOWN 11.8

Tigercat 845B Feller Buncher

Track drive

FOR DRIVE MOTOR AQ019, Refer Fig. 822-D61 1. Disconnect drive motor drain line on top of motor.

2. Install plug in line to minimize loss of oil.

3. Remove port adapter from motor drain port.

4. Fill motor with oil through the drain port. Add oil slowly until level is to the top of drain port.

5. Re-connect drain line.

6. Run each drive motor slowly with track off the ground for three track revolutions to remove air from the drive circuit.

7. Check that the brake release pressure has not changed.

DRAIN LINE

••

'U' PORT DRAIN CONNECTION GAUGE TEST PORT 'Y1'

••

•

DRIVE MOTOR TOP VIEW

822-D61

GAUGE TEST PORT Y1 SYSTEM PRESSURE PORT 'A'

• MAXIMUM DISPLACEMENT ADJUSTMENT STOP

PRESSURE REGULATOR VALVE BLOCK

••

6mm ALLEN KEY 19mm WRENCH SYSTEM PRESSURE PORT 'B'

••

MINIMUM DISPLACEMENT ADJUSTMENT STOP 6mm ALLEN KEY 19mm WRENCH

•

COUNTERBALANCE VALVE

••

'B' SIDE

•• CROSSOVER RELIEF VALVES

'A' SIDE

6mm WRENCH 13mm WRENCH

• 'L' PORT DRAIN CONNECTION (FOR L.H. SIDE)

5mm ALLEN KEY 17mm WRENCH 822-D62

BEGIN OF REGULATION ADJUSTING SCREW

DRIVE MOTOR (AQ019) - R.H. SIDE SHOWN 11.9

•

•• •• BRAKE RELEASE PRESSURE ADJUSTING SCREW 5mm ALLEN KEY 17mm WRENCH

Tigercat 845B Feller Buncher

845B-08

Track drive

TRACK DRIVE CIRCUIT DIAGRAM WITH AQ007 MOTOR 11.10

Tigercat 845B Feller Buncher

845B-26

Track drive

TRACK DRIVE CIRCUIT DIAGRAM WITH AQ019 MOTOR 11.11

Tigercat 845B Feller Buncher DRIVE SYSTEM PRESSURE SETTINGS FOR DRIVE MOTOR AQ007

Track drive

DRIVE MOTOR CROSSOVER RELIEF VALVE Pressure Setting: 4600 - 4800 psi (cracking pressure) Adjustment: Add shims to increase the relief pressure or remove shims to decrease.

11. With engine in IDLE position slowly depress DRIVE FOOT PEDAL for motor being tested to ensure brake holds.

'E' - CROSSOVER RELIEF VALVE 'F' - CAP 'G' - SHIM (AS REQD).

'H' - SHIM (AS REQD).

• • •

Approximate pressure change per shim:0.127 mm (0.005 in.) shim ....................... 100 psi 0.508 mm (0.020 in.) shim ....................... 500 psi

H

G

F

L.S. PRESSURE RELIEF VALVE ADJUSTING SCREW • 5MM ALLEN KEY • 17MM WRENCH

••

E

'LS' GAUGE TEST PORT 'P' GAUGE TEST PORT

••

••

•

•• AQ007-4

HIGH PRESSURE LIMITING CONTROL

DRIVE MOTOR (AQ007)

12. With an assistant depressing the drive pedal, observe the pressure at the ‘P’ test port on the Linde main valve manifold. A reading of 4700 psi should be observed. If a pressure reading of less than 4700 psi is observed, the pressure can be adjusted by adding shims (G) and (H) in cap (F) of crossover relief valve (E).

MAIN CONTROL VALVE TEST PROCEDURE: Place felling head securely on ground before performing any service work.

103-17A

1. Ensure that the hydraulic oil is at operating temperature.

13. Repeat step (11) and (12) for the crossover relief valve on other drive motor.

2. Remove both LEFT an RIGHT drive motor inspection covers.

3. Connect a 0-10,000 PSI pressure gauge on ‘P’ test port of Linde main valve manifold.

4. Disconnect brake release line(s) at brake port on final drive gearbox(s) and plug hose with size 04 JIC plug. Cap port adapter on gearbox.

5. From inside cab, close and latch the cab door.

6. Start the engine and set throttle speed to IDLE. 7. Lower the LEFT arm rest and press the PILOT RESET switch to activate the pilot system.

8. Turn anti-stall switch OFF 9. Turn ‘DRIVE/LOW’ switch to ‘LOW’.

10. Temporarily reset Load Sense Relief Valve to 4700 psi measured at the main valve ‘P’ test port. Refer to SET LOAD SENSE RELIEF VALVE in SECTION 4 of THIS MANUAL.

11.12

Tigercat 845B Feller Buncher

Track drive

14. After the crossover reliefs in both drive motors have been set, RESET the Load Sense relief to 4300 psi. (4000 psi at L.S. test port). Refer to SET LOAD SENSE RELIEF VALVE in SECTION 4 of THIS MANUAL. 15. Stop engine.

16. Re-connect brake line(s) to both gearboxes.

17. Remove pressure gauge and wipe up any spills.

18. Replace both LEFT and RIGHT drive motor inspection covers.

DRIVE SYSTEM PRESSURE SETTINGS FOR DRIVE MOTOR AQ007, CONTINUED:-

DRIVE SPEED CHANGE VALVE The drive speed change valve is located in the drive motor cover. This valve controls the hydraulic pressure signal to the maximum displacement piston to shift the motor to maximum displacement.

With the ‘DRIVE/LOW’ switch in the ‘LOW’ position, the solenoid on the solenoid pilot valve is energized and a hydraulic pressure signal is sent to the maximum displacement piston to shift the motor to maximum displacement. This will give the slowest speed and maximum tractive effort regardless of supply oil pressure.

With the switch in the ‘DRIVE’ position, the motor will be in its minimum displacement position which will give the highest speed.

When supply oil pressure increases above the drive speed change valve pressure setting (e.g. a high load is encountered such as a grade or obstacle), the drive speed change valve will shift to allow supply oil to flow to the maximum displacement piston. The motor shifts to maximum displacement.

Drive Speed Change Valve Pressure Setting: 3500 - 3700 psi.

Adjustment: Add shims to increase the pressure setting or remove shims to decrease.

11.13

Tigercat 845B Feller Buncher DRIVE SYSTEM PRESSURE SETTINGS FOR DRIVE MOTOR AQ019

Track drive

DRIVE MOTOR CROSSOVER RELIEF VALVES Pressure Setting: 4600-4800 psi (cracking press.)

13. Temporarily reset Load Sense Relief Valve to 4700 psi by pressing LEFT drive pedal in FORWARD or REVERSE. Measure at the main valve ‘P’ test port. Refer to SET LOAD SENSE RELIEF VALVE in SECTION 4 of THIS MANUAL.

TEST PROCEDURE: Place felling head securely on the ground before performing any service work.

14. With the aid of an assistant; While holding the LEFT drive pedal in the FORWARD position loosen locknut on FORWARD crossover relief

1. Ensure hydraulic oil is at operating temperature.

'B' SIDE REVERSE CROSSOVER RELIEF VALVE

'A' SIDE FORWARD CROSSOVER RELIEF VALVE

2. Remove both LEFT and RIGHT drive motor inspection covers.

••

3. Install a 0 to 10,000 psi gauge on 'P' test port on Linde main valve manifold.

•

••

L.S. PRESSURE RELIEF VALVE ADJUSTING SCREW • 5MM ALLEN KEY • 17MM WRENCH 822-D60

'LS' GAUGE TEST PORT

DRIVE MOTOR (AQ019) - LEFT SIDE SHOWN 'P' GAUGE TEST PORT

•

••

•

'B' SIDE REVERSE CROSSOVER RELIEF VALVE

'A' SIDE FORWARD CROSSOVER RELIEF VALVE

5mm ALLEN KEY 17mm WRENCH

5mm ALLEN KEY 17mm WRENCH

HIGH PRESSURE LIMITING CONTROL 103-17A

••

LINDE MAIN VALVE MANIFOLD

•

4. Disconnect LEFT brake line at port on final drive gearbox. Plug hose with size 04JIC plug and cap port adapter on gearbox.

822-D62

5. From inside cab, close and latch the cab door.

DRIVE MOTOR (AQ019) - RIGHT SIDE SHOWN

6. Start engine and set throttle speed to IDLE.

valve adjusting screw and unscrew slowly until engine begins to lug. Turn adjusting screw 1/8 of a turn in and tighten locknut.

7. Lower LEFT armrest and press PILOT RESET switch to activate pilot system.

8. Place ANTI-STALL switch OFF position.

15. Repeat step (14) to set the LEFT REVERSE crossover relief valve.

9. Place DRIVE/LOW switch to LOW. 10. Activate LEFT track drive foot pedal in both FORWARD and REVERSE directions to ensure that the track does not move.

11. With the aid of an assistant, activate LEFT track drive foot pedal in either FORWARD or REVERSE and check pressure reading on gauge at 'P' port. the gauge should show 4300 psi (Main system LS. relief pressure) 12. Loosen locknut on both crossover relief valve adjusting screws and turn both adjusting screws all the way in. Tighten locknuts.

16. Repeat steps (4) through (15) to set the RIGHT track drive motor.

17. Reset the LS. relief valve to 4300 psi. on gauge at 'P' test port. Refer to SET LOAD SENSE RELIEF VALVE in SECTION 4 of THIS MANUAL. 18. Stop engine.

19. Re-connect brake line(s) to both gearboxes.

20. Remove pressure gauge and wipe up any spills.

21. Replace both LEFT and RIGHT drive motor inspection covers.

11.14

Tigercat 845B Feller Buncher

Track drive

SET BRAKE RELEASE PRESSURE ADJUSTMENT ON DRIVE MOTOR AQ019

SET BEGIN OF REGULATION (DRIVE SPEED CHANGE VALVE)

Pressure setting: 500 psi. (cracking pressure)

1. Ensure hydraulic oil is at operating temperature.

Place felling head securely on the ground before performing any service work.

2. Remove both LEFT and RIGHT drive motor inspection covers.

1. Ensure hydraulic oil is at operating temperature.

3. Install a 0 to 10,000 psi gauge on 'P' test port on Linde main valve manifold.

2. Remove both LEFT and RIGHT drive motor inspection covers.

4. Disconnect LEFT brake line at port on final drive gearbox. Plug hose with size 04JIC plug and cap port adapter on gearbox.

3. Disconnect LEFT brake line at port on final drive gearbox.

4. Install a 0 to 1,000 psi gauge onto brake line hose end (size 04JIC).

BEGIN OF REGULATION ADJUSTING SCREW

5. From inside cab, close and latch the cab door.

6.

6mm WRENCH 13mm WRENCH

Start engine and set throttle to FULL.

7. Lower LEFT armrest and press PILOT RESET switch to activate pilot system.

•

8. Place DRIVE/LOW switch to DRIVE. 9. With the aid of an assistant; activate LEFT track drive foot pedal in either FORWARD or REVERSE direction and check pressure reading on gauge connected to brake line, the gauge should show 500 psi.

GAUGE TEST PORT 'Y1' QUICK CONNECT 845B-D39

BRAKE RELEASE PRESSURE ADJUSTING SCREW

• •

••

DRIVE MOTOR (AQ019) - LEFT SIDE SHOWN 5. Install a 0 to 5,000 psi gauge on drive motor gauge test port 'Y1', size 04JIC quick connect.

5mm ALLEN KEY 17mm WRENCH

6. From inside cab, close and latch the cab door.

7.

Start engine and set throttle to FULL.

8. Lower LEFT armrest and press PILOT RESET switch to activate pilot system.

•• 822-D62

PRESSURE REGULATOR VALVE BLOCK

BEGIN OF REGULATION ADJUSTING SCREW

9. Place ANTI-STALL switch OFF position.

10. Place DRIVE/LOW switch to DRIVE.

6mm WRENCH 13mm WRENCH

11. Activate LEFT track drive foot pedal in both FORWARD and REVERSE directions to ensure that the track does not move.

DRIVE MOTOR (AQ019) - LEFT SIDE SHOWN If adjustment is required, loosen locknut on brake release pressure adjusting screw and turn screw in to increase pressure or out to decrease pressure. Tighten locknut.

12. With the aid of an assistant, activate LEFT drive foot pedal in FORWARD or REVERSE and temporarily set LS. relief valve to 3600 psi.** on gauge at 'P' test port on Linde main valve manifold.

10. Remove pressure gauge from brake line and reconnect brake line to gearbox.

11. Repeat steps (3) through (10) to set the RIGHT drive motor.

12. Stop engine.

13. Replace both LEFT and RIGHT drive motor inspection covers.

13. With the aid of an assistant, activate LEFT track drive foot pedal in the FORWARD direction and check pressure reading on gauge at motor gauge test port 'Y1' it should show between 800 and 1,000 psi.

Continued on page 16

11.15

Tigercat 845B Feller Buncher

Track drive

Continued from page 15

If adjustment is required, loosen locknut on begin of regulation adjusting screw and turn screw in to increase pressure or out to decrease pressure. Tighten locknut.

14. Stop engine and repeat steps (4) through (13) to set the RIGHT drive motor.

15. Reset the LS. relief valve to 4300 psi. Refer to SET LOAD SENSE RELIEF VALVE in SECTION 4 of THIS MANUAL. 16. Stop engine.

17. Re-connect brake line(s) to both gearboxes.

18. Remove pressure gauge and wipe up any spills.

19. Replace both LEFT and RIGHT drive motor inspection covers. **NOTE For begin of regulation; this pressure setting can be adjusted between 3100 psi and 3600 psi depending on the operator's requirements. The lower the begin of regulation setting the sooner the drive motors will automatically shift to LOW when encountering difficult terrain conditions.

11.16

Tigercat 845B Feller Buncher

Track drive ADJUSTMENTS SEQUENCE:

TRACK TIM ING CHART GEARBOX RPM

DESIRED LOW

DESIRED HIGH

DO NOT EXCEED

NUM BER OF TRAC K LINKS 45 47 51 TRACK REVOLUTION TIM E (SECONDS)

10 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 36 37 38 39 40

23.48 21.34 19.57 18.06 16.77 15.65 14.67 13.81 13.04 12.36 11.74 11.18 10.67 10.21 9.78 9.39 9.03 8.70 8.39 8.10 7.83 7.57 7.34 7.11 6.91 6.71 6.52 6.35 6.18 6.02 5.87

24.52 22.29 20.43 18.86 17.52 16.35 15.33 14.42 13.62 12.91 12.26 11.68 11.15 10.66 10.22 9.81 9.43 9.08 8.76 8.46 8.17 7.91 7.66 7.43 7.21 7.01 6.81 6.63 6.45 6.29 6.13

DRIVE ENGINE DRIVE/LOW ADJUSTMENT MODE RPM SWITCH POS. FORWARD SLOW = FULL LOW FWD. SPOOL STOP FORWARD FAST = FULL DRIVE MOTOR MIN. DISPL. REVERSE FAST = FULL DRIVE REV. SPOOL STOP REVERSE SLOW = THIS DRIVE MODE WILL BE A PRODUCT OF THE ABOVE THREE ADJUSTMENTS. THERE IS NO CALEBRATION OR SPECIAL ADJUSTMENT REQUIRED.

26.61 24.19 22.17 20.47 19.01 17.74 16.63 15.65 14.78 14.00 13.30 12.67 12.09 11.57 11.09 10.64 10.23 9.86 9.50 9.18 8.87 8.58 8.32 8.06 7.83 7.60 7.39 7.19 7.00 6.82 6.65

SET TRACK SPEED Low speed 12 rpm**. High speed 24 rpm. **NOTE: This value is dependant on engine HIGH IDLE speed or FULL throttle. 12 rpm is based on 2150 - 2200 rpm.

1. Ensure hydraulic oil is at operating temperature.

2. Remove both left and right final drive inspection covers to access track motors.

LEFT TRACK ADJUSTMENT POSITION MACHINE: 3. Position felling head in vertical position and swing boom to LEFT side of machine.

845BTRACKCHART.XLS

TRACK SPEED SET-UP PROCEDURE IMPORTANT: EACH motor maximum displacement setting must be correctly set before making adjustments to the valve spool stops described here in. Refer to the following SET MOTOR MAX. DISPL. (SLOW SPEED) procedure.

Also note that changes in margin pressure will also affect track speeds.

ANGLE TO BE BETWEEN 90° & 110°

845-12

LIFTING LEFT TRACK

4. Place felling head on ground and by forcing down with boom controls, lift track clear of ground. (Hoist down and stick out)

NOTE: Both left and right 845B track drives have 4 (speed) settings which are dealt with in the following procedures, they are: 1, Forward-Slow 2, Forward-Fast 3, Reverse-Fast 4, Reverse-Slow.

WARNING DO NOT place arms, legs or body under track while in the raised position.

However, there are only 3 adjustments required to accomplish this;

5. Use blocks to firmly support track frame in raised position.

1, Forward flow stop adjusting screw 2, Reverse flow stop adjusting screw 3, Motor minimum displacement adjustment stop Continued on page 18

11.17

Tigercat 845B Feller Buncher Continued from page 17

Track drive 10. Set throttle to FULL.

SET MOTOR MAXIMUM DISPL. (SLOW SPEED) NOTE: The motor maximum displacement setting is the SLOW speed setting and is factory set to: AQ007, MAXIMUM DISP. = 90cc/rev.

MINIMUM DISP. = approx. 42cc/rev.

11. With an assistant depressing LEFT TRACK drive pedal FORWARD, turn maximum displacement screw IN until the end of adjusting screw makes contact with piston inside the motor.

ADJUSTMENT NOTE: Turn the screw either IN (clockwise) to speed up or OUT (counterclockwise) to slow down the final drive.

12. Release drive pedal and turn screw IN an additional: 1 1/4 turns = 90cc (AQ007 motor) 1/4 turn = 105cc (AQ019 motor).

Tighten locknut while holding adjusting screw from turning.

6. On LEFT track drive motor, unscrew the maximum displacement adjusting screw all the way OUT.

13. LEFT drive motor MAXIMUM displacement is now set to 90 cc (AQ007 motor) or 105cc (AQ019 motor).

AQ019, MAXIMUM DISP. = 105cc/rev.

MINIMUM DISP. = approx. 50cc/rev.

7. Lower L.H. armrest and press PILOT RESET switch to activate the pilot system 8. Place ANTI-STALL switch OFF position.

9. Set TRACK (LOW/DRIVE) switch to LOW. MAXIMUM 6mm ALLEN KEY DISPLACEMENT ADJUSTING SCREW 19mm WRENCH

MINIMUM DISPLACEMENT ADJUSTING SCREW

•• • • •• MINIMUM DISPLACEMENT ADJUSTING SCREW 6mm ALLEN KEY 19mm WRENCH

LEFT TRACK DRIVE MOTOR (AQ007)

268-3

MINIMUM DISPLACEMENT ADJUSTING SCREW

MAXIMUM DISPLACEMENT ADJUSTING SCREW 268-3

RIGHT TRACK DRIVE MOTOR (AQ007) MAXIMUM DISPLACEMENT ADJUSTMENT STOP

6mm ALLEN KEY 19mm WRENCH

• •• ••

6mm ALLEN KEY 19mm WRENCH 822-D60

MINIMUM DISPLACEMENT ADJUSTMENT STOP

MAXIMUM DISPLACEMENT ADJUSTING SCREW 822-D61

LEFT TRACK DRIVE MOTOR (AQ019) 11.18

••

RIGHT TRACK DRIVE MOTOR (AQ019)

Tigercat 845B Feller Buncher

Track drive

SLOW FORWARD (VALVE FLOW SETTING) SPOOL STOP ADJUSTING SCREW • 19mm WRENCH • 6mm ALLEN KEY

14. Turn ‘DRIVE/LOW’ switch to ‘LOW’ 15. Set engine to FULL throttle.

••

16. With an assistant depressing ‘LEFT’ TRACK drive pedal ‘FORWARD’, record track drive sprocket speed.

A TIMING MARK, VISIBLE FROM THE CAB CAN ALSO BE PLACED ON THE TRACK

ROTATION 853MV-2

VALVE FLOW SETTING TRACK DRIVE MAIN CONTROL VALVE

TO RECORD TRACK SPEED, PLACE TIMING MARKS ON TRACK FRAME AND GEARBOX HOUSING 84-18

Turn the screw either IN (clockwise) to slow down or OUT (counterclockwise) to speed up the final drive. Tighten locknut on adjusting screw and re-check sprocket speed.

SET TRACK SPEED Track containing 45 links*: A reading of 12 RPM is desired which equals 1 complete revolution of the track every 19.6 seconds.

Continued on page 20

Track containing 47 links*: A reading of 13 RPM is desired which equals 1 complete revolution of the track every 18.9 seconds.

17. To obtain the 12 or 13 RPM value adjust FORWARD spool stop adjusting screw for the LEFT track drive control valve.

•

REVERSE SPOOL FORWARD SPOOL STOP SCREW FOR STOP SCREW FOR RIGHT TRACK LEFT TRACK

•

RIGHT DRIVE VALVE LEFT DRIVE VALVE

• FORWARD SPOOL STOP SCREW FOR RIGHT TRACK 101-1

REVERSE SPOOL STOP SCREW FOR LEFT TRACK

•

MAIN CONTROL VALVE

* Refer to TRACK TIMING CHART on previous page.

11.19

Tigercat 845B Feller Buncher

Track drive

MAXIMUM DISPLACEMENT ADJUSTING SCREW

or OUT (counterclockwise) to speed up the final drive. Tighten locknut on adjusting screw and re-check sprocket speed.

••

IMPORTANT: DO NOT exceed the recommended track speed specified above, over speeding will damage the drive motor. *NOTE: Refer to TRACK TIMING CHART on previous page.

•

FAST REVERSE (valve flow setting) 22. Repeat steps 18 to 20 to set ‘LEFT’ TRACK HIGH REVERSE.

MINIMUM DISPLACEMENT ADJUSTING SCREW

23. To obtain 24 or 25 RPM value adjust REVERSE spool stop adjusting screw for the LEFT track drive control valve. Turn the screw either IN (clockwise) to slow down or OUT (counterclockwise) to speed up the final drive. Tighten locknut on adjusting screw and re-check sprocket speed.

LEFT TRACK DRIVE MOTOR (AQ007)

268-3

MINIMUM DISPLACEMENT ADJUSTMENT STOP

•• •• MAXIMUM DISPLACEMENT ADJUSTMENT STOP 822-D60

LEFT TRACK DRIVE MOTOR (AQ019)

Continued from page 19

FAST FORWARD (motor minimum displacement) 18. Turn ‘DRIVE/LOW’ switch to ‘DRIVE’ 19. Set engine to FULL throttle.

20. With an assistant depressing ‘LEFT’ TRACK drive pedal ‘FORWARD’, record track drive sprocket speed.

Track containing 45 links*: A reading of 24 RPM is desired which equals 1 complete revolution of the track every 9.8 seconds.

Track containing 47 links*: A reading of 25 RPM is desired which equals 1 complete revolution of the track every 9.8 seconds.

21. To obtain the 24 or 25 RPM adjust the minimum displacement adjusting screw for the LEFT track drive motor. Turn the screw either IN (clockwise) to slow down 11.20

Tigercat 845B Feller Buncher

Track drive

TRACK SPEED SET-UP PROCEDURE cont;

RIGHT TRACK ADJUSTMENT 24. Re-position machine to raise RIGHT TRACK.

ANGLE TO BE BETWEEN 90° & 110°

845-12

LIFTING RIGHT TRACK

WARNING DO NOT place arms, legs or body under track while lowering the machine.

25. Repeat steps 6 to 13 to set ‘RIGHT’ drive motor maximum displacement SLOW FORWARD (valve flow setting) 26. Repeat steps 14 to 17 for ‘RIGHT’ TRACK. FAST FORWARD (motor minimum displ.)

27 Repeat steps 18 to 21 for ‘RIGHT’ TRACK.

11.21

Tigercat 845B Feller Buncher TRACK COMPONENTS IMPORTANT: New machine: Before driving a new machine ensure that track sag is set correctly. Track sag may be set less than specified for shipping purposes.

Track drive sprocket and the track bushings. Bushings could crack during sprocket impact.

MEASURING TRACK SAG 1. Position felling head in vertical position and swing boom to side of machine.

The correct track sag must be adjusted once a machine has been delivered to the job sight and operating in the accumulated soil build-up in the undercarriage.

TRACK SAG NOTE: The track sag dimension is very important and should be checked regularly, 50% increase in the life of the track assembly can be realized, particularly bushing O/D wear and track pitch by maintaining the correct amount of track sag. A track that is too tight will wear out significantly faster due to increased tension in the chain.

Track components operate under varying terrain conditions, most of which cause excessive wear.

Wear to one component can quickly spread to the rest of the track assembly.

To ensure that the track components are always in good running order, a periodic inspection should be made to ensure that components have not come loose, that bolts are at the correct torque, that components are within the specified wear limits (discussed further in this section) and where applicable, check lubrication points.

ANGLE TO BE BETWEEN 90° & 110°

845-12

2. Place felling head on ground and by forcing down with boom controls, lift track clear of ground.

3. Rotate track in forward and reverse several times. Stop the track while in reverse. Do not clean the track.

4. Stop engine.

5. Measure distance between top surface of track shoe at centre of lower surface of track frame.

It is also recommended to verify that the track sag is correct BEFORE performing any track drive hydraulic set-up procedures.

UNDERSIDE OF TRACK GUARD

For a guide on inspection, refer to the PERIODIC MAINTENANCE SCHEDULE in SECTION 3 OF THIS MANUAL.

SAG DIMENSION

• •

UPPER SURFACE OF TRACK SHOE 853ILL8

MEASURING SAG DIMENSION

6. This dimension should be between 4" and 6" for normal operations.

845-13

OPERATE MACHINE WITH FELLING HEAD OVER IDLERS

NOTE: If track sag is less than specified, track chain wear will be accelerated. If track sag is excessive, it is possible for the track to jump off the sprocket.

OPERATING THE MACHINE Whenever possible the machine should always be operated with the felling head over the IDLERS and not over the SPROCKETS. Operating over the sprockets will result in overloading of the contact surfaces between the 11.22

Tigercat 845B Feller Buncher IDLER ADJUSTING 4 CYLINDER

Track drive TORQUING UNDERCARRIAGE BOLTS

•

It is important to check the torque values of the track shoe retaining bolts and the bottom roller retaining bolts at the NEW MACHINE MAINTENANCE time period (first 100 hours) and the EVERY 125 HOURS SCHEDULED MAINTENANCE time period.

3

•

DO NOT REM OVE

•

•

CW001-3

• 1

2

When installing new components, all traces of paint and dirt must be removed from all mating surfaces including the contact area under the bolt head and nut.

TRACK ADJUSTMENT TRACK SAG ADJUSTMENT

Both the bolt and the nut on the track shoes should be lightly lubricated with SAE 30 oil and tightened using the Torque-turn method.

To tighten track, attach adjustment fitting adapter (3) onto valve body (1). Connect a grease gun to the grease fitting (2) on the adjustment fitting adapter (3). Add grease until track sag dimension is within recommended limits. Remove adjustment fitting adapter.

The torque-turn method involves torquing the bolt to an initial predetermined value, plus an additional 1/3 turn (not the value shown in the torque charts). This ensures a more accurate and consistent torquing of the bolts, with less likelihood of the bolt/nut coming loose later.

CAUTION: The grease is under very high pressure, DO NOT REMOVE the adjustment fitting valve body (1) from the idler adjusting cylinder (4).

When checking the torque values at the first 100 hours and every 125 hours thereafter use the CHECKING TORQUE values listed in the following paragraphs.

To loosen track, slowly loosen valve body (1) until grease begins to escape via a relief passage in the valve body housing, grease will be seen escaping from around valve body threads. When track sag is correct, tighten valve body.

If loose shoes or under torqued bolts are discovered during the FIRST 100 HOUR check, they should be removed, surfaces cleaned, and reused using the torque-turn method. If the shoe is not loose but a single bolt is low on torque, loosen the bolt and re torque-turn.

CW001-2

If loose or under torqued bolts are discovered any time after the 100 HOUR check, the bolts and nuts must be replaced with NEW ones, surfaces cleaned, and re torque-turned.

TRACK SHOE RETAINING BOLTS Track shoes must be fastened together applying the exact torque values shown below and using the Torque-turn method described in TORQUING UNDER CARRIAGE BOLTS earlier in this section.

TORQUE 1

TRACK COMPONENT TORQUE VALUES 11.23

Tigercat 845B Feller Buncher

Track drive

Track shoe bolts and nuts are designed specifically for this purpose and should not be substituted with standard off the shelf hardware.

Only bolts with grade '12.9' or '170' designation forged in the head are approved.

SINGLE GROUSER BERC-9

When checking the torque values at the first 100 hours and every 125 hours thereafter use the checking torque value.

DOUBLE GROUSER BERC-10

Track shoe bolts ~ 3/4" UNC TORQUE-TURN ............ 250LBF-FT. + 1/3 TURN. CHECKING TORQUE ....................... 450 LBF-FT.

TRIPLE GROUSER

Track shoe bolts ~ M24 BERC-1

TORQUE-TURN ............ 340LBF-FT. + 1/3 TURN.

GROUSER WEAR (HEIGHT)

CHECKING TORQUE ..................... 1040 LBF-FT.

WEAR LIMITS

BOTTOM ROLLER RETAINING BOLTS

TRACK SHOE GROUSER HEIGHT WEAR WEAR LIMITS New 75% wear 100% wear Single 2.82"(716.2mm) ... 1.37" (348mm) ........ 0.93" (236.2mm) Double 1.37"(348mm) ...... 0.71" (180.3mm) ..... 0.43" (109.2mm) Triple 1.06"(269.2mm) ... 0.51" (129.5mm) ..... 0.36" (91.4mm)

The bottom rollers must be fastened to the lower frame applying the exact torque values shown below.

When installing new rollers, apply "NEVER-SEEZ" to the bolt.

When checking the torque values at the first 100 hours and every 125 hours thereafter use the torque value(s) shown below.

NOTE: Allowable wear for soft ground conditions is 100%. Allowable wear for rocky ground conditions is 75%.

NOTE: Two sizes of bolts have been used to fasten the rollers to the lower frame; 3/4" UNC; and on later machines 7/8" UNC. Bottom roller bolts ~ 3/4" UNC TORQUE ......................................... 310 LBF-FT. Bottom roller bolts ~ 7/8" UNC TORQUE ......................................... 475 LBF-FT. BERC-2

For a complete maintenance check Refer to the PREVENTIVE MAINTENANCE SCHEDULE in SECTION 3 of this manual.

TRACK LINK WEAR (HEIGHT)

TRACK LINK WEAR WEAR LIMITS New link height ........................ 4.78" (121.5mm) 50% wear ................................ 4.60" (116.8mm) 75% wear ................................ 4.48" (113.8mm) 100% wear .............................. 4.34" (110.2mm)

11.24

Tigercat 845B Feller Buncher

Track drive

PIN AND BUSHING WEAR

BUSHING WEAR, OUTSIDE DIAMETER

To obtain the track internal wear, i.e., the wear between the pin and the internal diameter of the bushing, measure the track pitch over four sections of track (5 pins).

Use a calliper to measure the wear of the bushing O.D. in three places.

45°

45°

FORWARD SIDE VERTICAL WEAR WEAR BERC-3

MEASURING TRACK PITCH

To take this measurement, 1. Remove slack by placing a steel pin between sprocket and chain, then slowly move machine in reverse to tighten chain.

2. Measure pitch across two four link sections, except section on each side of the master pin, to find average chain wear.

INTERNAL PIN & BUSHING WEAR

ROTATION

MEASURING BUSHING WEAR

BERC-5

NOTE: Bushing outside diameter is measured at three places because of the forward and reverse travel of the machine and a vertical wear that takes place.

WEAR LIMITS New bushing O.D. ........................ 2.62" (66.6mm) 75% worn ..................................... 2.5" (63.5mm) 100% worn ................................... 2.43" (61.7mm) NOTE: Allowable wear in rocky ground is 75% BOTTOM ROLLER WEAR

180° EXTERNAL BUSHING WEAR

REVERSE SIDE WEAR

TURN PIN & BUSHING 180°

Measure the roller diameter on the tread contact surface with a large calliper to obtain the worst wear condition.

BERC-4 PIN/BUSHING INTERNAL WEAR NOTE: Wear to the pins and bushings only occurs in a small localised area, to extend the life of these components, the pins and bushings may be turned 180° or replaced provided other components are within specified wear limits:

1. Track link wear is 75% or less.

2. Change in track pitch is 32.50:" (825.5mm) per link or less.

3. Bushing external wear less than 100% or 75% or less in rocky ground.

BERC-6

MEASURING BTM. ROLLER WEAR

4. There is at least 0.008" (0.2mm) press fit available between pin and bushing and link.

If accessibility to the rollers is impaired by guards, then concentrate on the front and rear rollers, these will be the most worn.

WEAR LIMITS New length of four sections .............. 32" (813.0mm) 75% worn ......................................... 32.37"(822.2mm) 100% worn ....................................... 32.50"(825.5mm)

WEAR LIMITS New roller. ................................... 8.26" (210.0mm) 75% worn .................................... 7.64" (194.0mm) 100% worn .................................. 7.36" (187.0mm)

NOTE: Allowable wear in rocky ground is 75% NOTE: These wear limits are to be used as a guide for when to turn the pins and bushings. If pins and bushings are not to be turned, the chain can be run past the 100% wear limit, until chain failure.

11.25

Tigercat 845B Feller Buncher IDLER WEAR Measure the idler wheel side diameters (tread contact surface) at several points to obtain the worst wear condition. Position a depth gauge or measuring tape as close as possible toward the centre of the idler with the gauge flat on the centre flange and parallel to the idler shaft.

Track drive Since the checking area is not immediately visible, the measuring may be done using a "go/ no go" gauge made from a piece of 1/8" flat bar.

The gauge is inserted down through the holes in the track and placed between the track guide and the track bushing. Make sure that dirt build-up does not interfere with the reading. Check at several locations. The ends of the track slides tend to wear first. The slides should be replaced if excessive wear is found.

'A'

BERC-7

'A'

MEASURING IDLER WEAR

WEAR LIMITS New idler dimension ...................... 0.85"(22.0mm) 100% wear .................................... 1.18"(30.0mm)

TRACK SLIDE WEAR

845-32

TRACK SLIDE WEAR

Track slide wear should be checked periodically to ensure that it does not go over the limit and cause damage to the chain link bushings.

CHAIN LINK

•

•

CHECK THIS DIMENSION

•

CHAIN LINK BUSHING TRACK GUIDE

•

TRACK SLIDE

845-33

SECTION A - A

1/8"

845-33A

SUGGESTED MEASURING GAUGE The wear occurs on the top of the track slide as the chain links slide along and this wear will reduce the clearance between the track guide and the chain link bushings. When this clearance disappears the chain link bushings will start to wear.

11.26

Tigercat 845B Feller Buncher

SECTION 12 - BOOM FUNCTIONS DECEMBER 2003

CONTENTS - SECTION 12 ADJUST OIL FLOW TO CYLINDERS (CYLINDER CYCLE TIMES ................ 12.8 BOOM CONTROL VALVE ............................................................................ 12.3 BOOM SYSTEM DESCRIPTION ................................................................... 12.2 'ER' BOOM SYSTEM ...................................................................... 12.2, 12.6

SEE ALSO SECTON 4

CIRCUIT SCHEMATIC ......................................................................... 12.4, 12.5 CYLINDER CYCLE TIMES, TYPICAL ........................................................... 12.9 ENGINE ANTI-STALL .................................................................................... 12.3

SEE ALSO SECTON 4

LOAD SENSING ........................................................................................... 12.3

SEE ALSO SECTION 9

SET MAIN BOOM, STICK AND TILT PORT RELIEF VALVES ...................... 12.6 TILT CYLINDER (ROD END) FLOW ADJUSTMENT .................................... 12.10 TILT CYLINDER FLOW ADJUSTMENT ............................................. 12.3, 12.10

Tigercat 845B Feller Buncher BOOM SYSTEM DESCRIPTION

Boom functions

One cylinder is used to raise and lower the main boom.

The stick boom and the tilt each use identical single cylinders.

These cylinders receive oil from the main pump via three spool sections on the main hydraulic valve.

Two joystick handles in the cab control the movement of each cylinder by directing pilot oil to the pilot end caps on each end of the appropriate spool sections to shift the spool and move the cylinder(s).

'ER' BOOM SYSTEM An additional REACH cylinder is plumbed into the above boom system to allow movement of the boom system to be controlled by the LEFT and RIGHT joystick levers. Simply pushing the LEFT joystick FORWARD moves the boom straight out or pulling back on the joystick moves the head towards the machine. The right joystick moves the boom system UP or DOWN. For additional information regarding SAFETY and OPERATING INSTRUCTIONS, Refer to ER BOOM SYSTEM in SECTION 1 of THIS MANUAL and SECTION 2 in the OPERATOR'S MANUAL.

12.2

Tigercat 845B Feller Buncher

Boom functions

BOOM CONTROL VALVE

of trees in the felling head causing the head to TILT FORWARD too fast. Tilting forward too fast can cause oil to cavitate in the base end of the tilt cylinder.

The boom, stick and tilt spool sections each have port relief valves with anticavitation features.

These protect the circuit from abnormally high pressures induced by the load.

For adjusting procedure refer to TILT CYLINDER (ROD END) FLOW ADJUSTMENT in THIS SECTION.

Adjustable spool travel stops on each pilot end cap of the spool sections can be adjusted to limit spool travel and control the flow of oil to the cylinder. Controlling the flow of oil to the cylinders also controls the operating speed.

To adjust the relief valves, Refer to SET MAIN BOOM, STICK AND TILT PORT RELIEF VALVES in THIS SECTION. To adjust oil flow, Refer to ADJUST OIL FLOW TO CYLINDERS in THIS SECTION.

An additional flow control adjusting screw (restrictor) located on the under side of the main valve manifold is used to regulate the flow of return oil from the rod end of the TILT cylinder.

LOAD SENSING\ENGINE ANTI-STALL The boom hydraulics along with the swing and track drive circuits are all under the control of the load sensing system incorporated into the main hydraulic circuit.

This adjustment is to compensate for the weight

For a full description of the main hydraulic system including load sensing, the main pump and the main control valve, Refer to SECTION 4 in THIS MANUAL.

UNDERSIDE OF LINDE MAIN VALVE MANIFOLD

•• •• MAIN BOOM 'DOWN' FLOW ADJUSTING SCREW

TILT 'BACK' FLOW ADJUSTING SCREW

STICK 'OUT' PORT CONNECTION

••

••

A

••

A

A

••

CONTROL VALVE MANIFOLD

•

•

A

A

B

MAIN BOOM 'DOWN' PORT CONNECTION MAIN BOOM 'UP' FLOW ADJUSTING SCREW

•

••

B B

101-1X

STICK 'IN' FLOW ADJUSTING SCREW

TILT 'FORWARD' PORT CONNECTION

MAIN BOOM 'UP' PORT CONNECTION

B

For a full description of the pilot system including the joystick handles, Refer to SECTION 5 in THIS MANUAL.

TILT CYL. FLOW ADJUSTING SCREW

120-15A

A

For a full description of the engine anti-stall, Refer to SECTION 9 in THIS MANUAL.

TILT CYLINDER RESTRICTION ADJUSTMENT SCREW

••

B

B

•• TILT 'BACK' PORT CONNECTION TILT 'FORWARD' FLOW ADJUSTING SCREW

•

• •

STICK 'IN' PORT CONNECTION STICK 'OUT' FLOW ADJUSTING SCREW

MAIN CONTROL VALVE FLOW ADJUSTING SCREWS 12.3

Tigercat 845B Feller Buncher

845B-09

Boom functions

'STANDARD' BOOM SYSTEM HYDRAULIC CIRCUIT 12.4

Tigercat 845B Feller Buncher

845B-46

Boom functions

'ER' BOOM SYSTEM HYDRAULIC CIRCUIT 12.5

Tigercat 845B Feller Buncher

Boom functions

••

WARNING 'ER' BOOM SYSTEM When setting up a machine equipped with an (ER) boom system, the following points must be noted.

The main and stick boom cylinder circuits are connected hydraulically. Thus, disconnecting a hydraulic line to a boom cylinder may cause either boom to move unexpectedly. The boom may also move unexpectedly if a port relief adjusting screw is unscrewed (counterclockwise) too far and the pressure drops below that which is required to hold the weight of the boom and head. Ensure that the attachment is resting squarely on a solid footing, tank pressure is relieved and engine is shut off before disconnecting any hydraulic lines. See FIG. 1.

Also note that because of the hydraulic connection between the main boom and ER cylinders, the ER cylinder can overpower the stick cylinder under certain conditions, causing the stick boom to move unexpectedly. This most often occurs when setting the MAIN BOOM UP relief valve, causing the stick to extend, but it may also happen at other times if the relief settings are not correct. Ensure that all personnel and equipment are clear of the boom path and that there is sufficient overhead clearance for the head to rise before making any adjustments.

STICK CYLINDERS FULLY EXTENDED

TIP OF STICK BOOM FULLY SUPPORTED 845B-42

'LS' GAUGE TEST PORT 'P' GAUGE TEST PORT

••

SERVICE POSITION FIG.1

SET MAIN BOOM, STICK AND TILT PORT RELIEF VALVES NOTE: Constant loosening and tightening of the locknut (sealnut) on the port relief valve adjusting screws will eventually cause the seal in the nut to break down and leak.

Because of this it is best to keep the adjusting procedure brief.

•

••

HIGH PRESSURE LIMITING CONTROL 103-17A

LINDE MAIN VALVE MANIFOLD

2. Connect a 0-5000 psi pressure gauge on 'P' test port of Linde main valve manifold.

3. Start engine and set throttle speed to IDLE position. NOTE; It may be necessary to increase the engine RPM sufficiently to prevent the engine from stalling.

4. Lower LEFT armrest and press PILOT RESET switch to activate pilot system.

5. Place ANTI-STALL switch in OFF position.

SPOOL TRAVEL STOP • 19mm WRENCH • 6mm ALLEN KEY

•

ADJUSTING SCREW • 5mm ALLEN KEY

MAIN VALVE BODY

90744-3

•

PILOT END CAP

•

• •

LOCKNUT • 17mm WRENCH PORT RELIEF VALVE

•

L.S. PRESSURE RELIEF VALVE ADJUSTING SCREW • 5MM ALLEN KEY • 17MM WRENCH

• MAIN VALVE PORT RELIEF VALVE

6. Turn port relief valve adjusting screws for functions being set fully IN (clockwise). Do not overtighten or breakage will result.

7. With the aid of an assistant, bottom out the cylinder of the function being set and adjust L.S. pressure relief valve on Linde main valve manifold to 4700 psi on pressure gauge at 'P' port. Tighten locknut on adjusting screw.

1. Ensure hydraulic oil is at operating temperature.

12.6

Tigercat 845B Feller Buncher

Boom functions

MAIN BOOM PORT RELIEFS: NOTE: When making these relief adjustments, the upper should be positioned with the boom in the straight ahead position between the tracks.

10. Tighten locknut on adjusting screw taking care NOT to turn the adjusting screw at the same time.

11. Check the setting again by ensuring that the hissing noise is still absent after tightening the locknut.

8. With an assistant holding R.H. joystick in MAIN BOOM UP position (fully extended), loosen locknut on the main boom UP port relief valve cartridge and slowly unscrew adjusting screw (counterclockwise) until oil can be heard (hissing noise) flowing through the relief valve or engine begins to lug slightly.

12. With an assistant holding R.H. joystick in MAIN BOOM DOWN position (fully retracted), loosen locknut on the main boom DOWN port relief valve cartridge and slowly unscrew adjusting screw (counterclockwise) until oil can be heard (hissing noise) flowing through the relief valve or engine begins to lug slightly.

WARNING

13. Slowly raise setting (clockwise) until hissing noise stops or until engine stops lugging.

When adjusting the port relief valves, the boom will fall if the relief adjusting screw is unscrewed (counterclockwise) out too far.

NOTE: Observe the pressure gauge at 'P' port when making these adjustments, it will fall and rise as the adjusting screw is being turned and should show 4700 psi as the hissing sound begins to subside or until engine stops lugging.

9. Slowly raise setting (clockwise) until hissing noise stops or until engine stops lugging.

NOTE: Observe the pressure gauge at 'P' port when making these adjustments, it will fall and rise as the adjusting screw is being turned and should show 4700 psi as the hissing sound begins to subside or until engine stops lugging.

MAIN BOOM 'DOWN' FLOW ADJUSTING SCREW

STICK 'OUT' PORT CONNECTION

A

••

A

A

B

••

CONTROL VALVE MANIFOLD

••

•

A

A

B

MAIN BOOM 'DOWN' PORT CONNECTION MAIN BOOM 'UP' FLOW ADJUSTING SCREW

••

•

B B

101-1X

STICK 'IN' FLOW ADJUSTING SCREW

TILT 'FORWARD' PORT CONNECTION

•

•

15. Check the setting again by ensuring that the hissing noise is still absent after tightening the locknut.

TILT 'BACK' FLOW ADJUSTING SCREW

MAIN BOOM 'UP' PORT CONNECTION

A

14. Tighten locknut on adjusting screw taking care NOT to turn the adjusting screw at the same time.

••

B

B

• TILT 'BACK' PORT CONNECTION TILT 'FORWARD' FLOW ADJUSTING SCREW

•

•• ••

STICK 'IN' PORT CONNECTION STICK 'OUT' FLOW ADJUSTING SCREW

MAIN CONTROL VALVE FLOW ADJUSTING SCREWS 12.7

Tigercat 845B Feller Buncher

Boom functions

STICK AND TILT PORT RELIEFS 16. Repeat steps 6 thru' 15 to set the port relief valves for the STICK 'IN' and 'OUT' and the TILT 'FORWARD' and 'BACK' functions.

MAIN BOOM CYLINDER; 5. Fully retract cylinder.

6. Place MAIN BOOM joystick lever in 'FULL UP' position and fully ** extend cylinder.

Record cycle time from stop to stop.

17. Readjust L.S. pressure relief valve on Linde main valve manifold to read 4300 psi on pressure gauge at 'P' port (4000 psi at 'LS' port). Refer to SET LOAD SENSE RELIEF VALVE in SECTION 4 of THIS MANUAL.

7. Place MAIN BOOM joystick lever in 'FULL DOWN' position and fully ** retract cylinder.

Record cycle time from stop to stop.

STICK BOOM CYLINDER; 8. Repeat steps (5), (6) and (7) using STICK BOOM joystick lever.

18. Stop engine, remove all gauges and reinstall plugs and caps.

ADJUST OIL FLOW TO CYLINDERS (CYLINDER CYCLE TIMES)

TILT CYLINDER; NOTE: Before the TILT cylinder cycle times can be recorded, the rod end flow control adjusting screw must first be set correctly.

NOTE: Constant loosening and tightening of the locknut (sealnut) on the adjusting screws will eventually cause the seal in the nut to break down and leak. Because of this it is best to keep the adjusting procedure brief.

See TILT CYLINDER (ROD END) FLOW ADJUSTMENT in THIS SECTION. 9. Repeat steps (5), (6) and (7) using TILT joystick lever.

1. Ensure hydraulic oil is at operating temperature.

** When extending or retracting the cylinders to record the time stop the cylinder just before it gets to the end of it's stroke rather than let it bottom out and impose unnecessary loads on the cylinder parts and boom structures.

2. Start engine and set throttle speed to FULL position.

3. Lower LEFT armrest and press PILOT RESET switch to activate pilot system.

4. Place ANTI-STALL switch in OFF position.

MAIN BOOM 'DOWN' FLOW ADJUSTING SCREW

TILT 'BACK' FLOW ADJUSTING SCREW

STICK 'OUT' PORT CONNECTION

••

A

••

A

••

A

••

A

MAIN BOOM 'UP' FLOW ADJUSTING SCREW

•

••

B B

101-1X

A

B

MAIN BOOM 'DOWN' PORT CONNECTION

CONTROL VALVE MANIFOLD

•

•

A B

STICK 'IN' FLOW ADJUSTING SCREW

TILT 'FORWARD' PORT CONNECTION

MAIN BOOM 'UP' PORT CONNECTION

••

B

B

•• TILT 'BACK' PORT CONNECTION TILT 'FORWARD' FLOW ADJUSTING SCREW

•

• •

STICK 'IN' PORT CONNECTION STICK 'OUT' FLOW ADJUSTING SCREW

MAIN CONTROL VALVE FLOW ADJUSTING SCREWS 12.8

Tigercat 845B Feller Buncher

BOOM FUNCTIONS MAIN BOOM UP MAIN BOOM DOWN STICK BOOM OUT STICK BOOM IN TILT FORWARD TILT BACK 30° WRIST RIGHT 30° WRIST LEFT

Boom functions

CYLINDER CYCLE TIMES - 845B ER BOOM TIME W/STD TILT TIME W/4-LINK SEE NOTE* SEE NOTE* 8 sec.

8 sec.

4.5 sec.

4.5 sec.

4.5 sec.

4.5 sec.

3.8 sec.

4.0 sec.

3.8 sec.

4.0 sec.

2.5 sec.

2.5 sec.

2.5 sec.

2.5 sec.

TYPICAL CYLINDER CYCLE TIMES

NON-ER BOOM TIME W/STD TILT TIME W/4-LINK 5.5 sec.

5.5 sec.

6 sec.

6 sec.

4.6 sec.

4.6 sec.

4.8 sec.

4.8 sec.

5.6 sec.

5.6 sec.

5.0 sec.

5.0 sec.

2.5 sec.

2.5 sec.

2.5 sec.

2.5 sec.

*NOTE:

The chart below lists typical cylinder cycle times and is based on recommended factory settings and with hydraulic oil at operating temperature. It should be noted that over adjusting to provide faster cycle times will increase the stress on boom components and the hydraulic system.

To adjust cycle times; Loosen locknut on spool adjusting screw on main control valve and turn adjusting screw IN (clockwise) to SLOW DOWN and OUT (counterclockwise) SPEED UP†. Tighten locknut on adjusting screw and re-check times.

The main boom UP on the ER' boom system is not set by a cycle time; The spool stop adjusting screw must be adjusted so that the felling head will rise slightly as the boom system is moving OUT. If set too LOW the felling head will fall to the ground as the boom system is moving OUT or, if set too HIGH the felling will rise too fast.

† IMPORTANT, OVER ADJUSTING: If the adjusting screw is turned TOO FAR OUT, the valve spool will travel beyond the optimum position for maximum oil flow. This will cause the cycle time to INCREASE and the boom will begin to SLOW DOWN. In this case turn the adjusting screw back IN and repeat the adjustment procedure.

PORT CONNECTIONS: The 'B' ports (bottom ports) are connected to the base end of the cylinders and the 'A' ports (top ports) are connected to the rod end of the cylinders.

To adjust the flow rate at 'A' PORTS, adjust spool travel stop adjusting screw located at BOTTOM of valve and vice-versa for 'B' ports. See figure 101-1x.

12.9

Tigercat 845B Feller Buncher

Boom functions

TILT CYLINDER (ROD END) FLOW AND SPEED ADJUSTMENT This adjusting screw restricts the flow of oil leaving the rod end of the TILT cylinder when tilting FORWARD.

7. Loosen locknut on restriction adjustment screw. While holding joystick in the fully TILT FORWARD position, observe pressure gauge and record the TILT travel speed from stop to stop**. Use the restriction adjustment screw to adjust the speed and use the spool travel stop adjustment on the main control valve to maintain 800-1000 psi pump pressure.

If the TILT speed is too fast, screw restriction adjustment screw IN. If the TILT speed is too slow, screw the restriction adjustment screw OUT.

UNDERSIDE OF LINDE MAIN VALVE MANIFOLD

•• •• 120-15A

If the pump pressure reading is too low increase flow by screwing TILT spool travel stop adjusting screw (bottom adjuster) OUT. Or if the pressure is too high, decrease the flow by screwing the adjusting screw IN.

TILT CYLINDER RESTRICTION ADJUSTMENT SCREW

TILT CYL. FLOW ADJUSTING SCREW

NOTE: The Tilt restriction and (to a lesser extent) the spool travel stop adjustment both affect the TILT forward speed. Similarly, the TILT restrictor has a small affect on the pump pressure. Alternate between adjustments making moderate changes until the desired speed and pressure ranges are achieved.

When correctly set, this restriction will prevent cylinder damage.

1. Ensure hydraulic oil is at operating temperature.

•

L.S. PRESSURE RELIEF VALVE ADJUSTING SCREW • 5MM ALLEN KEY • 17MM WRENCH 'LS' GAUGE TEST PORT 'P' GAUGE TEST PORT

•

••

•

8. Tighten locknut on restriction adjustment screw taking care NOT to turn the adjusting screw at the same time.

9. Check the pressures again after tightening the locknut.

10. Stop engine and remove gauge. ** When extending or retracting the cylinders to record the time stop the cylinder just before it gets to the end of it's stroke rather than let it bottom out and impose unnecessary loads on the cylinder parts and boom structures.

HIGH PRESSURE LIMITING CONTROL 103-17A

LINDE MAIN VALVE MANIFOLD

2. Connect a 0-5000 psi pressure gauge on 'P' test port of Linde main valve manifold.

3. Start engine and set throttle speed to FULL position.

4. Lower LEFT armrest and press PILOT RESET switch to activate pilot system.

5. Place ANTI-STALL switch in OFF position.

6. Raise boom and place felling head in fully TILT BACK position (cylinder fully retracted).

12.10

Tigercat 845B Feller Buncher

SECTION 15 - SWING DECEMBER 2003

CONTENTS - SECTION 15 ADJUST OIL FLOW TO SWING MOTOR(SWING MOTOR SPEED) ............. 15.5 LUBRICATE GEARBOX LOWER BEARINGS ............................................... 15.4 SCHEMATIC DIAGRAMS SWING CIRCUIT SCHEMATIC .................................................................. 15.3 SWING DRIVE MOTOR SCHEMATIC ....................................................... 15.2 SET SWING MOTOR SPEED ....................................................................... 15.5 SWING BEARING WEAR LIMITS ................................................................. 15.9 SWING DRIVE SWING HYDRAULICS .............................................................................. 15.2 SET CROSSLINE RELIEF VALVES ...................................................... 15.4 SWING DRIVE GEARBOX BEARING HOUSING DESIGN VARIATIONS ............................................. 15.8 LUBRICATION OF LOWER BEARINGS .................................................... 15.4 SUN GEAR INSTALLATION ...................................................................... 15.7 SWING MOTOR REMOVAL FROM GEARBOX ............................................ 15.6

Tigercat 845B Feller Buncher MOTOR

Swing R.H. ROTATION

CROSSLINE RELIEF VALVES

•• •••

•

L.H. ROTATION

SWING BRAKE

The swing gearbox upper gearing is lubricated by hydraulic oil which flows from the oil cooler bypass/return manifold into the 'U' port on the swing drive gearbox. A 1/16 inch orifice/connector installed in the 'U' port regulates the flow of oil through the gearbox at approximately 1 GPM. Oil is returned to tank via flushing port 'T'.

ALTERNATE BRAKE RELEASE PORT 'Z' (PLUGGED)

STEEL DISC FRICTION DISC

FLUSHING PORT 'T'

CONNECTOR/ ORIFICE 0.062" DIA

FLUSHING PORT 'U'

1/16" DIA. ORIFICE CONNECTOR PORT 'U'

• ••

• •

• •

• •

GEARBOX

• BRAKE RELEASE PORT 'Y'

•• 845B-D32

SWING DRIVE GEARBOX

SWING DRIVE -SWING HYDRAULICS

BK005-8

CROSS SECTION OF SWING BRAKE CONNECTOR/ ORIFICE 0.062" DIA

The swing function is controlled by the left joystick valve which sends proportional pilot signals to the main valve which, in turn, supplies oil to the swing motor.

SWING BRAKE

•

The swing motor is a piston motor with crossline relief valves mounted on the input end. The crossline relief valves provide a cushion to the high forces that occur during start and stop of the boom swing.

GEARBOX FLUSHING OIL SUPPLY FROM OIL COOLER BYPASS/ RETURN MANIFOLD

FROM BRAKE RELEASE PILOT

Power is transmitted from the motor to a double reduction planetary gearbox which has a springapplied, hydraulic-release, multi-disc brake on the input shaft. This brake is normally ON. Placing the swing brake switch in the OFF position energizes the swing brake solenoid pilot valve on the pilot manifold and allows pilot oil pressure to flow to the swing brake via port 'Y', to release the swing brake.

•

• CROSS LINE RELIEF VALVES

PRESSURE LINES FROM MAIN CONTROL VALVE

WARNING Never drive machine with swing brake applied. If felling head makes contact with an immoveable object, forces could damage swing drive gearbox.

830-16

Port 'Z' contains an internal orifice but the port is plugged and not used.

In the event that electrical power to the solenoid pilot valve or hydraulic pressure to the pilot valve is lost, the swing brake will engage (ON) automatically.

15.2

SWING DRIVE MOTOR SCHEMATIC

Tigercat 845B Feller Buncher

845B-10

Swing

SWING DRIVE CIRCUIT 15.3

Tigercat 845B Feller Buncher

Swing

LUBRICATION OF SWING DRIVE GEARBOX LOWER BEARINGS

5. Turn anti-stall switch OFF and the swing brake ON.

The cavity in the lower portion of the gearbox where the two lower bearings are housed is completely filled with grease.

CROSSLINE RELIEF VALVES R.H. ROTATION

LUBE FITTINGS

•

••

••

ADJUSTING SCREWS

111-6 845B-D33

LUBRICATE GEARBOX LOWER BEARINGS To gain access to the lube fitting, remove the cover plate directly below the gearbox. Using a hand grease gun, pump 5 shots of grease into each grease fitting. Follow the lubricating procedure on the label located beside the grease fittings and also refer to SCHEDULED MAINTENANCE - 250 HOURS, in SECTION 3 of THIS MANUAL SET CROSSLINE RELIEF VALVES 1. Ensure that the hydraulic oil is at operating temperature.

LINDE MAIN VALVE MANIFOLD

••

• •• • • CROSSLINE RELIEF

If pressure gauge is installed in 'P' test port, reading on gauge would be 3300 psi.

7. Retighten locknut on each adjusting screw taking care not to disturb adjusting screw and recheck pressure setting before removing pressure gauge.

8. Stop engine, remove gauge and reinstall plug.

'P' GAUGE TEST PORT

••

L.H. ROTATION

6. While operating the L.H. joystick lever fully in both the LEFT and RIGHT directions, loosen locknut on each crossline relief adjusting screw and turn adjusting screw until the reading on pressure gauge in 'L.S.' test port is 3000 psi. for each direction.

HIGH PRESSURE LIMITING CONTROL

••

•••

• L.S. GAUGE TEST PORT

MAIN VALVE MANIFOLD 2. Install a 0-5000 psi pressure gauge in the 'L.S.' test port on the back of the main valve manifold.

103-17A

3. Start engine and place throttle control in FULL. 4. Lower LEFT armrest and press PILOT RESET switch to activate the pilot system.

15.4

Tigercat 845B Feller Buncher

Swing

ADJUST OIL FLOW TO SWING MOTOR (SWING MOTOR SPEED)

SPOOL TRAVEL STOP • 19MM WRENCH • 6MM ALLEN KEY

NOTE: Constant loosening and tightening of the locknut (sealnut) on the adjusting screws will eventually cause the seal in the nut to break down and leak. Because of this it is best to keep the adjusting procedure brief.

••

PILOT END CAP

MAKE UP VALVE

1. Ensure that the hydraulic oil is at operating temperature.

2. Start engine and place engine throttle control in FULL position.

••

MAIN VALVE BODY

3. Lower LEFT armrest and press PILOT RESET switch to activate the pilot system.

4. Raise felling head off ground and place L.H. joystick lever in 'FULL LEFT' position and rotate the upper. Record time for one complete revolution.

•

• 90919-1

MAIN VALVE SPOOL TRAVEL STOP

5. To adjust swing speed; (Refer to main valve photo and fig. 90919-1) Loosen locknut on spool travel stop adjusting screw and turn adjusting screw IN (clockwise) to slow down and OUT (counterclockwise) speed up. Tighten locknut on adjusting screw and re-check times.

5. Repeat step (3) with L.H. joystick lever in 'FULL RIGHT' position.

The recommended factory setting is between 6 and 7 RPM. It should be noted that over adjusting to provide a faster swing speed could increase the stress on boom components and increase the heat load in the hydraulic system.

FLOW ADJUSTING SCREW FOR SWING LEFT

•

HIGH PRESSURE LIMITING CONTROL

•

CONTROL VALVE MANIFOLD

A

•

A A A B

A A

B B B B

B

• 101-1

FLOW ADJUSTING SCREW FOR SWING RIGHT

MAIN CONTROL VALVE 15.5

Tigercat 845B Feller Buncher

•

SWING DRIVE MOTOR M16 HEX. HD. RETAINING BOLTS TORQUE TO 150 LBF/FT (205 NM) SWING BRAKE ASSY.

Swing CROSS LINE RELIEF HOUSING

•

PROCEDURE: 1. Remove the swing drive motor from the swing drive gearbox.

SUN GEAR M12 HEX. HD. RETAINING BOLTS TORQUE TO 62 LBF/FT

• •

ALIGNMENT MARKS

•

GEARBOX

•

•• ••

AQ009-4

2. Make alignments mark on the sun gear and brake housing to facilitate reassembly of the sun gear back into the swing drive gearbox.

These alignment marks should guarantee that both the brake disc and the first stage planetary gear teeth will be in alignment with the sun gear splines and bottom gear teeth, provided nothing has moved.

SWING PINION

• BK010-2

SWING DRIVE ASSEMBLY

DISASSEMBLY AND ASSEMBLY OF SWING MOTOR FROM GEARBOX When the swing drive motor is removed from the swing drive gearbox for inspection or repair, there is a possibility that the sun gear may not mesh properly with the first stage planetary gears when it is reinstalled.This will cause premature failure of the swing drive gearbox.

Installing the sun gear involves lining up all of the brake discs so that the outer splines on the sun gear can slide through the brake discs allowing the bottom gear teeth to mesh properly with the first stage planet gears.

BRAKE HOUSING WITH MOTOR REMOVED

3. Remove the sun gear from the swing drive gearbox and inspect the gear teeth at the bottom of the sun gear for abnormal damage or wear.

If there is no visible damage to the gear teeth, proceed to step (6). If there is visible damage to the sun gear, it must be replaced, proceed to step (4).

4. If the sun gear in step (3) has visible signs of damage, then the first stage planetary gears must also be inspected. Remove the brake assembly and inspect the first stage planetary gears for visible damage. If there is no visible damage, proceed to step (5). If there is visible damage to the first stage planetary gears, then the entire swing drive gearbox should be replaced.

5. Assuming that there is no visible damage to the first stage planetary gears, reassemble the brake assembly back onto the swing drive gearbox and secure it by reusing the six M12x30mm hex head bolts. Torque each hex head bolt to 62 lbf/ft (84 Nm).

15.6

Tigercat 845B Feller Buncher M12 HEX. HD. RETAINING BOLTS

BRAKE HOUSING

SUN 'O' RING GEAR

Swing

MOTOR MOTOR MOUNTING SURFACE

• •

•

• 1-5/16" ± 1/16"

• • 'O' RING

• • • BRAKE DISCS

FIRST STAGE PLANETARY GEARS (3)

• BOTTOM GEAR TEETH ON SUN GEAR

BK005-6

VERIFY SUN GEAR IS FULLY INSTALLED 6. Reinstall the sun gear into the swing drive gearbox using the alignment marks made in step (2). Verify that the sun gear is properly and fully engaged into the swing drive gearbox, i.e.; That the outer splines on the sun gear have passed through all of the brake discs.

This can be done by measuring the distance between the swing motor mounting surface and the top of the flat surface of the sun gear (1 5/16” ± 1/16”).

7. Verify that the O-ring is properly seated and secured on the swing motor. If there is any difficulty in securing it in place, use a small amount of petroleum jelly on the O-ring for assistance.

8. Center the spacer ring on top of the sun gear and install the swing drive motor. Torque the two M16 mounting bolts to 150 lbf/ft (205 Nm).

15.7

Tigercat 845B Feller Buncher BEARING HOUSING DESIGN VARIATIONS, SWING DRIVE GEARBOX

Swing When the gearbox is assembled to the machine the lower portion of the bearing housing fits into a precision bored hole in the upper frame. The diameter of this bored hole on early machines is 230 mm and on later machines is 250 mm. A limited number of intermediate design gearboxes with a diameter of 230 mm were installed on later upper frames that had a spacer ring welded into the bored hole to reduce the hole diameter down to 230 mm.

(Spacer ring O/D = 250 mm; I/D = 230 mm.)

INTERCHANGEABILITY NOTE: If it becomes necessary to replace the intermediate design gearbox with the later design gearbox, the spacer ring must be removed.

There are three variations of the swing drive gearbox in use on the Tigercat models 845B and 860.

• Early design • Intermediate design • Later design The differences are confined to the lower half of the gearbox where the bearings are housed. Refer to the parts catalog for variations in part numbers.

To determine which gearbox is installed on any particular machine, refer to the illustration below which shows three profile illustrations indicating the shape of lower bearing housing.

SWING DRIVE MOTOR M16 HEX HEAD RETAINING BOLTS TORQUE TO 150 LBF-FT

M12 HEX HEAD RETAINING BOLTS TORQUE TO 62 LBF-FT

•

• ••

•

SWING BRAKE ASSEMBLY GEARBOX

LOWER BEARING HOUSING

LOWER BEARING HOUSING

•

• LOWER BEARING HOUSING

••

••

• •• UPPER FRAME SPACER RING BK010-3

BK010-2

BK010-4

230 mm 230 mm

EARLY DESIGN

250 mm

INTERMEDIATE DESIGN

250 mm

LATER DESIGN

SWING DRIVE GEARBOX, BEARING HOUSING DESIGN VARIATIONS 15.8

Tigercat 845B Feller Buncher SWING BEARING WEAR LIMITS It is important that the swing bearing be periodically inspected for wear. Any significant wear will be noticeable by observing too much "tilting" of the upper frame relative to the lower frame. A small amount of designed-in clearance in the bearing is normal and is present in a new machine.

Too much clearance will affect the backlash between the ring gear and the drive pinion and if left unchecked will cause damage to the gear teeth and ultimately the swing drive gearbox.

The main cause of wear in the ball race can be due to a lack of lubricant or not following the proper lubricating procedure. A damaged or missing peripheral seal will also contribute to early wear by allowing dirt particles to enter the ball race.

Swing The following procedure will verify the amount of wear in the ball race: 1. Position machine with boom fully extended as in position 1.

2. Set indicator to zero.

3. Lower boom as in position 2.

4. Note tilt reading on indicator.

5. Return machine to position 1.

6. Check to see if reading on indicator has returned to zero, if not repeat steps 1 thru 4.

7. Rotate upper frame 90 deg. and repeat steps 1 thru 6.

8. The bearing is considered to be worn when the total play is 0.105" or greater.

Regular inspection of the seal should be carried out and the proper lubricating procedure should be followed. Refer to FILTER AND LUBRICATION SCHEDULE in SECTION 3 of THIS MANUAL.

15.9

Tigercat 845B Feller Buncher

Swing

15.10

Tigercat 845B Feller Buncher

SECTION 17 - SAW DRIVE DECEMBER 2003

CONTENTS - SECTION 17 CIRCUIT DESCRIPTION ................................................................................ 17.6 CIRCUIT DIAGRAM (LATER MACHINES) ................................................... 17.10 CIRCUIT DIAGRAM EARLIER MACHINES) .................................................. 17.9 FELLING HEAD. SEE ORIGINAL MANUFACTURERS MANUAL FILTER, CASE DRAIN .................................................................................. 17.3 PRESSURE SETTINGS ................................................................................ 17.7 SAW CONTROL VALVES MAIN SAW CONTROL VALVE ................................................................. 17.4 MAIN SAW CONTROL VALVE OPERATING DESCRIPTION .................... 17.4 SAW PILOT VALVE .................................................................................. 17.4 SAW PUMP ................................................................................................. 17.2 PRESSURE COMPENSATOR VALVE ..................................................... 17.7

Tigercat 845B Feller Buncher

Saw drive

SAW PUMP The saw pump is an axial-piston variable displacement pump controlled by a pressure compensator. The pressure compensator is mounted directly onto the pump and has a STANDBY pressure adjustment and a P.O.R. adjustment.

The STANDBY adjusting screw is screwed completely in and is NOT used for this application.

The P.O.R. is adjusted to operate at 3600 psi.

Until system pressure reaches 3600 psi, the compensator valve will be in the "return" position blocking oil flow to the swashplate control piston leaving the pump at maximum displacement.

The pump is mounted and driven off the end of the main pump attached to the bell housing of the engine.

853SM48

SAW PUMP SCHEMATIC

A separate fixed displacement pump is mounted on the back of the saw pump for the wrist and clamps functions.

SAW PUMP (LINDE)

SAW PUMP PRESSURE COMPENSATOR

•• •

•• • MAIN PUMP (LINDE)

845B-D17

PUMP ASSEMBLY 17.2

WRIST AND CLAMPS PUMP

Tigercat 845B Feller Buncher

Saw drive

•

SAW PUMP PRESSURE COMPENSATOR VALVE

INPUT SHAFT CONNECTION TO MAIN PUMP

• •• OUTPUT SHAFT CONNECTION TO WRIST AND CLAMPS PUMP

SAW PUMP ~ SIDE VIEW

AP035

CASE DRAIN FILTER

For service and replacement intervals see SERVICE AND LUBRICATION CHART in THIS SECTION.

A case drain filter is installed in the return line from the case drain connection on the saw pump, this filter protects against contaminated oil entering the hydraulic system should the dedicated saw circuit develope a malfunction.

CASE DRAIN FILTER

••

SAW PUMP

••

HYDRAULIC OIL CASE DRAIN FILTER

••

396-22

17.3

CASE DRAIN CONNECTION

•• SAW PUMP PRESSURE 'P' PORT

Tigercat 845B Feller Buncher SAW CONTROL VALVES

Saw drive

The saw circuit is controlled by a solenoid operated pilot valve and a pilot operated main control valve.

SAW PILOT VALVE

SOLENOID

••

••

MAIN SAW CONTROL VALVE The main saw control valve is part of the clamps/ wrist/saw valve. It consists of an open center spool section and an inlet section containing a relief valve.

Three other spool sections along with one mid inlet section control the wrist, clamp and accumulator functions. Each spool section is pilot operated.

An outlet section directs return oil back to tank via the oil cooler.

For further description of wrist/clamps/saw valve refer to SECTION 18 of THIS MANUAL. MAIN SAW VALVE OPERATING DESCRIPTION

SAW, WRIST AND CLAMPS VALVE

•• SAW PILOT VALVE

100-F

SAW PILOT VALVE The saw pilot valve, mounted above the saw/wrist/clamps valve, consists of an aluminum body into which is housed a solenoid operated control valve cartridge.

VALVE BODY

DIN CONNECTOR

•

••

•• CONTROL VALVE CARTRIDGE

• SOLENOID

SAW PILOT VALVE An electrical signal from the saw switch in the cab energizes the solenoid in the pilot valve to shift the spool and direct pilot oil to one end of the spool section of the main saw valve.

AT022

17.4

Tigercat 845B Feller Buncher

Saw drive

Oil (system pressure) enters the end inlet section of the main control valve. When the spool is centered (at rest) the oil is allowed to pass through the saw spool section into a common tank passage of the wrist/clamp spool sections and back to tank via the outlet section. From the tank passage, the oil leaves the valve through the outlet section. On earlier machines it returns to tank via the oil cooler.

the spool directs oil from the saw pump to the saw motor.

The relief valve installed in the saw inlet section of the main saw valve is set higher than the saw pump compensator pressure setting and will limit the pressure should a pump regulator or "swashing" failure occur.

The relief valve diverts oil to tank via the tank passages in the spool sections and the outlet section of the wrist/clamps valve. It also functions as an ant-cavitation relief valve.

The saw spool section has a self centering 3-position spool which is open centered. A spring in the spool end cap holds the spool in the center neutral position.

For a detail description of the relief valves, refer to RELIEF VALVES in SECTION 18 of this manual.

The spool is shifted by pilot pressure being applied to one end of the spool from the pilot valve. Shifting

OUTLET SECTION POWER BEYOND PORT (TO SWING BRAKE)

•

••

ACCUM.

CLAMPS

INLET (MID) SECTION

WRIST

•

MAIN (MID) RELIEF VALVE

••

•• GAUGE TEST PORT (FOR WRIST & CLAMPS)

SAW

•

••

SAW SECTION

•

GAUGE TEST PORT (FOR SAW)

104-9

•

SAW CONTROL VALVE (WITH WRIST AND CLAMPS) 17.5

SAW RELIEF (4000PSI) - 1 " WRENCH - 11/16" WRENCH - SLOT SCREW DRIVER SAW END INLET SECTION

Tigercat 845B Feller Buncher

Saw drive PARALLEL PASSAGE

A

PLUG

LOAD CHECK VALVE

WORK PORT BRIDGE B

'O' RING

•

•

• • • • • PILOT END CAP

••

•• SPOOL CENTERING SPRING

•• THRU' NEUTRAL PASSAGE

• •

ANTI CAVITATION VALVE

• PILOT END SPOOL CAP

TANK PASSAGE

CROSS SECTION OF SAW SPOOL SECTION With the saw switch in the OFF position, the solenoid operated pilot valve is in the de-energized position The saw blade (typically) is driven by a variable preventing pilot oil flow from shifting the spool in the displacement hydraulic motor (axial piston, bent axis) main saw control valve. which is mounted directly above the saw blade and coupled to the saw blade through a drive shaft.

With the main saw control valve spool in this neutral position, the hydraulic oil is directed through the open The variable displacement saw pump supplies oil flow centre of the main control valve and back to tank. to the motor via the saw control valve. The main saw This prevents the saw pump from generating system control valve is pilot operated and controls the flow of pressure to rotate the blade, it also causes the saw hydraulic oil from the pump to the saw motor. A relief pump to shift to maximum displacement. valve is installed in the inlet section of the main saw control valve.

When the saw switch is placed in the ON position, the solenoid operated pilot valve will be placed in the A solenoid operated pilot valve controls the flow of energized position directing pilot oil to shift the spool pilot oil to the end of the spool in the main saw in main saw control valve. This will direct oil from the control valve. saw pump to the saw motor, causing the system The saw switch located on the control panel in the pressure to rise and the saw blade to begin to rotate. cab is used to turn the saw ON or OFF. It is a two When the pressure (system pressure) builds up to position switch controlling the flow of electrical 3600 psi the spool in the pump COMPENSATOR current via a relay to the saw pilot valve solenoid. valve shifts to direct oil to the pump swashplate An electrical signal from the saw switch energizes control piston. The piston moves the swashplate the solenoid in the pilot valve to shift the spool and towards the neutral position to cut back the flow of oil direct pilot oil to one end of the spool section of the while at the same time maintaining the pressure and main saw control valve. continuing to rotate the blade.

90136-4G

SAW CIRCUIT DESCRIPTION

NOTE: Saw will not operate with pilot system OFF. Saw will not function properly with low pilot pressure.

NOTE: If the engine has been turned off or the pilot shut off system tripped (L.H. arm rest raised) with the saw switch left in the ON position, the saw will not start up when the engine is restarted or the arm rest lowered. In this case press the PILOT RESET button and turn the saw switch OFF and then ON. IMPORTANT: To maximize pump and motor life, do not shut the engine off until the saw blade has come to a complete stop.

This system has a lower horsepower requirement and generates less heat since the pump reduces it's output flow instead of dumping hydraulic oil over relief valves.

The saw motor adjusts its displacement in response to system pressure, this is only true with variable displacement motors.

Return oil from the saw motor is directed through the outlet section of the wrist and clamps valve and on earlier machines through the oil cooler and back to tank.

For explanation of saw motor, refer to saw head manufacturers manual.

17.6

Tigercat 845B Feller Buncher PRESSURE SETTINGS:

Saw drive

PUMP AND SAW CONTROL VALVE 1. Park machine on level ground, lower felling head to the ground and stop engine.

2. Block saw blade from rotating as per method outlined in saw head manufacturer’s manual.

3. Ensure that the hydraulic oil is at operating temperature.

GAUGE TEST PORT (FOR SAW)

4. Install a 0-5000 PSI pressure gauge on saw valve gauge test port.

SAW RELIEF (4000 PSI) - 1 " WRENCH

5. On the pump compensator valve; •

•

Slacken jamnut on P.O.R. adjusting screw, and turn adjusting screw all the way in.

CAUTION: Do not use excessive force; stop when the resistance increases sharply. Tighten the jamnut.

•

• SAW CONTROL VALVE

104-9

The STANDBY valve adjusting screw is screwed fully IN (factory set) and must remain this way. This portion of the compensator is NOT USED.

P.O.R. VALVE (3600 PSI)

STANDBY VALVE

6. On saw control valve, slacken the jamnut and turn adjusting nut on saw control relief valve OUT until spring pressure is relieved.

•• 217-21

••

PRESSURE COMPENSATOR VALVE PRESSURE COMPENSATOR VALVE

WRIST AND CLAMPS PUMP (PARKER)

••

•

•

SAW PUMP (LINDE)

845B-D17

SAW PUMP WITH PRESSURE COMPENSATOR 17.7

Tigercat 845B Feller Buncher 7. Start the engine** and put throttle control to the IDLE position.

Saw drive TO 3200 PSI Refer to felling attachment manufacturer’s service literature for this procedure.

**CAUTION: Before starting engine, ensure saw relief valve is unscrewed as stated in step 6, otherwise damage could occur to the piston pump.

8. Lower left armrest and press PILOT RESET switch to activate pilot system.

9. Turn the saw switch ON. NOTE: Saw will not operate with pilot system OFF.

IMPORTANT The motor begin of stroke setting must be at least 400 PSI. lower than the pump P.O.R. setting.

SET MOTOR MINIMUM DISPLACEMENT Refer to felling attachment manufacturer’s service literature for this information.

Saw will not function properly with low pilot pressure.

NOTE: If the engine has been turned off or the pilot shut off system tripped (L.H. arm rest raised) with the saw switch left in the ON position, the saw will not start up when the engine is restarted or the arm rest lowered. In this case press the PILOT RESET button and turn the saw switch OFF and then ON. 10. Set the saw control valve relief*** pressure to 4000 psi. by slowly screwing the relief valve adjusting nut in until the required pressure reading is obtained.

11. Re-tighten jamnut, making sure adjusting nut does not turn.

IMPORTANT Saw relief valve must be set at least 400 psi. above pump P.O.R. to avoid generation of excessive heat.

12. Set P.O.R. on pump compensator to 3600 psi. (or to saw head manufacturers recommended value, which ever is lower) by slowly screwing the relief valve adjusting screw out until the required pressure reading is obtained.

13. Re-tighten jamnut, making sure adjusting screw does not turn.

14. The adjusting screw on the STANDBY valve must remain screwed fully IN. 15. Remove all pressure gauges. ***Refer to RELIEF VALVE ADJUSTING PROCEDURE in section 18 of this manual.

SET MOTOR BEGIN OF REGULATION

17.8

Tigercat 845B Feller Buncher

845B-11

Saw drive

SAW CIRCUIT (EARLIER MACHINES) 17.9

Tigercat 845B Feller Buncher

845B-31

Saw drive

SAW CIRCUIT (LATER MACHINES) 17.10

Tigercat 845B Feller Buncher

SECTION 18 - TREE CLAMPS AND WRIST DECEMBER 2003

CONTENTS - SECTION 18 CIRCUIT DESCRIPTION ............................................................................. 18.8 CIRCUIT DIAGRAM (EARLIER MACHINES) ............................................ 18.10 CIRCUIT DIAGRAM (LATER MACHINES) ................................................ 18.11 CONTROL VALVE ....................................................................................... 18.4 PRESSURE SETTINGS ............................................................................ 18.12 AIR IN PILOT END CAPS ...................................................................... 18.12 PUMP:- WRIST, TREE CLAMP AND ACCUMULATING ARMS ................. 18.2 RELIEF VALVE, ANTI-CAVITATION ........................................................... 18.6 RELIEF VALVE ADJUSTING PROCEDURE ........................................... 18.7 WRIST, 30°, 110° AND 340° ........................................................................ 18.2

Tigercat 845B Feller Buncher WRIST, TREE CLAMP AND ACCUMULATING ARMS

Tree clamps and wrist WRIST, TREE CLAMP AND ACCUMULATING ARMS PUMP

This section 17 of the service manual deals with the WRIST and TREE CLAMP(S) functions assocciated with the Tigercat disc saw felling head.

With regard to the WRIST function; There are three different types of wrist assemblies in use: 30°, 110° and 340°. The procedure for making pressure adjustments in each of these hydraulic circuits will vary.

This single section gear pump is driven off the PTO of the saw pump . The input drive shaft is connected to the saw pump shaft by a drive coupling.

DRIVE GEAR ON INPUT SHAFT

ALL aspects of pressure adjustments for the 110° and 340° WRIST ASSY. including cycle times, are explained in a separate Tigercat publication: Tigercat SAWS OPERATING AND SERVICE MANUAL. Only the 30° WRIST ASSY. pressure setting procedures are discussed in this manual.

NOTE: Refer to the OPERATING AND SERVICE MANUAL for Tigercat SAWS for ALL lubrication a maintenance schedule procedures.

THRUST PLATES

• • •

••

• INPUT DRIVE SHAFT (CONNECTED TO SAW PUMP) 845B-41

• GEAR HOUSING

PORT PLATE, REAR

WRIST/CLAMP/ACCUM. PUMP

The pump supplies hydraulic oil to the saw/clamp/ wrist valve. From there it is directed to operate the clamp and accumulating arms cylinders and the wrist cylinder. A power beyond (PB) port located in the outlet section of the control valve directs

WRIST/CLAMP/ ACCUM. PUMP

•• •

MAIN PUMP

845B-D16

••

SAW PUMP

PUMP ASSEMBLY 18.2

Tigercat 845B Feller Buncher

Tree clamps and wrist

hydraulic oil to the swing drive gearbox for lubricating and cooling purposes. A second 'PB' port directs hydraulic oil to the 'T3' port on the main Linde valve manifold. See MAIN HYDRAULIC CIRCUIT in SECTION 4 of THIS MANUAL. The return oil from this OPEN CIRCUIT is directed to tank via a return port 'T' on the outlet section of the control valve.

The operation of a typical external gear pump (so called because the gear teeth are on the external surface of the hub) is shown in Figure gear1.

OUTLET DRIVE GEAR

DRIVEN (IDLER) GEAR

•

•

INLET GEAR1

TYPICAL GEAR PUMP

A gear pump carries oil from the inlet to the outlet in the spaces between gear teeth. The pumping chamber is formed by the gears, the pump housing, and thrust plates. One of the two gears, called the drive gear, will be connected to the drive shaft. The other idler gear is driven by the drive gear.

18.3

Tigercat 845B Feller Buncher

Tree clamps and wrist

CONTROL VALVES

Each spool is pilot operated. The outlet section is common to all four sections and returns oil to the hydraulic tank. Power beyond (PB) ports in the outlet section can be used to direct oil on to "power" other hydraulic function or may be used as to connect additional return lines when necessary. In the case of the 845B these 'PB' ports are used to connect the 'T3' port on the main Linde valve manifold and the swing drive gearbox lubrication/cooling system.

For a detailed description of the pilot manifold refer to SECTION 5 of THIS MANUAL. For a detailed description of main and port relief valves, refer to ANTI-CAVITATION RELIEF VALVES in THIS SECTION. WRIST/CLAMP/ACCUMULATING VALVE The valve consists of four open center spool sections, an end inlet section, a mid inlet section and an outlet section. The inlet (end) section feeds a single spool which is used for the saw function. The mid inlet section feeds the remaining three spools which are used for the wrist, clamp and accumulating arms functions.

OUTLET SECTION

RETURN CONNECTION TO TANK ON LATER MACHINES OR OIL COOLER ON EARLIER MACHINES

Oil enters the mid inlet section and is allowed to pass through the three spool sections (wrist/clamp/ accumulating) and back to tank via the outlet section.

Each of the spool sections has a self centering 3position spool which is open center. A spring in the spool end cap holds the spool in the center neutral position. The spool is shifted by pilot pressure being POWER BEYOND PORT TO 'T3' PORT ON MAIN LINDE VALVE MANIFOLD

•

• •

••

POWER BEYOND PORT TO SWING BRAKE

•• •

ACCUM.

• PORT RELIEF VALVES

PORT RELIEF VALVES

CLAMP

••

•• INLET (MID) SECTION

WRIST

••

•

••

MAIN RELIEF VALVE

• SAW

• SAW SECTION

104-9

••

WRIST/CLAMP/ACCUMULATING VALVE (WITH SAW SECTION) 18.4

GAUGE TEST PORT

Tigercat 845B Feller Buncher

Tree clamps and wrist

applied to either end of the spool. Shifting the spool directs oil to operate any one of the three functions (or all at the same time if required but with reduced flow to each).

A MAIN RELIEF VALVE is installed in the mid inlet section of the valve. It controls the pressure to the three spool sections and is set lower than the PORT RELIEF VALVES.

IMPORTANT: Holding the CLAMP CLOSE button down on the joystick after the clamp cylinders are fully closed will not increase the clamping force on the trees, but will generate heat in the hydraulic system.

A MAIN RELIEF VALVE is also installed in the end inlet section of the saw section. Refer to SECTION 17, SAW DRIVE in THIS SECTION. All relief valves are the same type (anti-cavitation relief valve). For a detailed description of these relief valves, refer to ANTI-CAVITATION RELIEF VALVES in THIS SECTION.

To prevent over pressurizing of the operating circuits, each work port in the valve sections has a PORT RELIEF VALVE. OUTLET SECTION

• ••

PORT RELIEF VALVES

OPEN

B

A

CLOSE

•

CLOSE

A

B

OPEN

•

LEFT

A

B

RIGHT

MID INLET SECTION

•• PORT RELIEF VALVES

• •

MAIN RELIEF VALVE

••

• •• ••

SAW SECTION

WRIST/CLAMP/ACCUMULATING VALVE (WITH SAW SECTION)

845-19

RELIEF VALVE PORT 'A'

PARALLEL PASSAGE

LOAD CHECK VALVE

WORK PORT BRIDGE

A

RELIEF VALVE PORT 'B'

B

••

• •

PILOT END CAP 90136-3

SPOOL CENTERING SPRING

•

••

••

•

• •

PILOT END SPOOL CAP

•• TANK PASSAGE

THRU' NEUTRAL PASSAGE

CROSS SECTION OF SPOOL SECTIONS 18.5

••

Tigercat 845B Feller Buncher

Tree clamps and wrist ANTI-CAVITATION RELIEF VALVE LATER DESIGN

VALVE POPPET

T

••

P

Operation: Step 1.

T

STEP 1 PILOT POPPET

This valve is used as a MAIN and PORT relief valve in both the wrist, clamp and accumulating arms control valve(s).

‘P’ represents a high pressure area and ‘T’ represents tank. Under normal operation, ‘P’ is below the relief pressures, the valve poppet is firmly seated and oil cannot flow to tank.

T

Step 2.

••

P

STEP 2

T SEATING POPPET

Step 3.

T

••

P

STEP 3

When the pressure at ‘P’ reaches the relief valve setting, the pilot poppet unseats and allows oil in the inner cavity to flow to tank, thus lowering the pressure in the cavity between the pilot poppet and the other poppets.

T

As a result of the opening of the pilot poppet, the seating poppet moves back, due to the pressure drop caused by oil flow through the bore of the seating poppet, and seats against the pilot poppet. This shuts off the flow of oil through the seating poppet and the cavity pressure now drops to tank pressure.

Step 4.

VALVE POPPET

T

• STEP 4

P

T

Step 5.

T

VALVE POPPET

•• STEP 5

P

T CHECK POPPET

When pressure ‘P’ drops the pilot poppet closes and then the seating poppet moves back to its original position and permits oil pressure to flow into the cavity behind the valve poppet. As the seating poppet moves back it comes in contact with the valve poppet and its spring force plus the oil pressure cause the valve poppet to move back to the closed position.

As an anti-void or check valve

T

•• ANTI-VOID CHECK OPERATION

As the seating poppet began to move away from the valve poppet, the valve poppet began to open under the effect of the pressure at P thus allowing a large volume of flow to tank. The drop in pressure behind the valve poppet when the seating poppet seats on the pilot poppet ensures full opening of the valve poppet.

P

T

The anti-void unit supplies oil to the pressure area ‘P’ when its pressure drops below the pressure in the tank gallery of the valve. The valve then acts as a free flow check valve and prevents cavitation. In this condition, the pressure at ‘P’ is lower than at ‘T’ and due to the shape of the check poppet, the pressure forces cause the poppet to unseat, allowing oil to flow 18.6

Tigercat 845B Feller Buncher

Tree clamps and wrist

from ‘T’ to ‘P’.

ANTI-CAVITATION RELIEF VALVE ADJUSTING ADJUSTING NUT

••

JAMNUT, 1" WRENCH

••

PROCEDURE 1. Loosen jamnut.

2. Turn adjusting nut** to obtain desired pressure reading on gauge.

3. Lock jamnut against adjusting nut using 6 - 8 lbf/ft., making sure the adjusting screw does not turn.

5. Re-check relief setting. **IMPORTANT: Approach the gauge reading slowly and deliberately by turning adjusting nut in a little at a time.

For complete step-by-step pressure setting procedures of circuits using these relief valves,

18.7

Tigercat 845B Feller Buncher

Tree clamps and wrist 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.

Refer to the appropriate sections in this manual.

WRIST, CLAMP AND ACCUMULATING ARMS CIRCUIT DESCRIPTION The clamp and accumulating arms are each operated by independent hydraulic cylinders. The wrist cylinder extends or retracts to provide a clockwise or counter-clockwise rotation of the felling head. The cylinders receive oil from a fixed displacement pump via three spool sections in the wrist/clamp/accumulating control valve.

The wrist is operated by trigger buttons on the joystick handles. The right hand button rotates the felling head in the counter-clockwise direction and the left hand button rotates the head in the clockwise direction. The switches operate solenoid pilot valves which direct pilot oil to the wrist section of the control valve to shift the spool. The spool directs oil from the pump to either end of the cylinder and from the cylinder back to tank and on

earlier machines via the oil cooler and back to tank.

The clamp arm is operated by a 3 position thumb switch (OPEN/CLOSE, self centering to OFF) located on the right joystick control handle. The switch operates two solenoid pilot valves which direct pilot oil to the clamp arm spool section of the control valve, to shift the spool. The spool directs oil from the pump to either end of the cylinder and from the cylinder back to tank and on earlier machines via the oil cooler and back to tank.

The accumulating arms are operated by a 3 position thumb switch (OPEN/CLOSE, self centering to OFF) located on the left joystick control handle. The switch operates two solenoid pilot valves which direct pilot oil to the accumulating arms spool section of the control valve, to shift the spool. The spool directs oil from the pump to either end of the cylinder and from

18.8

Tigercat 845B Feller Buncher

Tree clamps and wrist

18.9

Tigercat 845B Feller Buncher

845B12

Tree clamps and wrist

WRIST, CLAMP AND ACCUMULATING ARMS CIRCUIT DIAGRAM (EARLIER MACHINES) 18.10

Tigercat 845B Feller Buncher

845B-32

Tree clamps and wrist

WRIST, CLAMP AND ACCUMULATING ARMS CIRCUIT DIAGRAM (LATER MACHINES) 18.11

Tigercat 845B Feller Buncher

Tree clamps and wrist

the cylinder back to tank and on earlier machines via the oil cooler and back to tank.

PRESSURE SETTINGS WARNING:. Ensure that no one is near the felling head during this procedure. Have the felling head on the ground during this procedure except when adjusting the wrist port relief valves. The swing brake should be applied at all times during this procedure.

NOTE: It may be necessary to increase the engine speed sufficiently to prevent the engine from stalling.

7. While holding the joystick thumb switch in the ACCUMULATING ARMS CLOSE position (cylinder fully extended), check gauge pressure reading. If less than 3200 psi., readjust accumulating arms close port relief. Repeat above procedure until a gauge reading of 3200 psi is obtained.

IMPORTANT: Avoid blowing oil over the relief for longer than 5 seconds, as this will cause excessive heating of the hydraulic fluid and possible damage to the pump.

IMPORTANT: During these procedures, Do Not hold thumb switch in the on position for longer than 5 seconds.

IMPORTANT: Approach the gauge reading slowly and deliberately by turning adjusting nut in a little at a time. The pressure setting must not exceed the above value.

NOTE: For this type of main and port relief valve, Refer to RELIEF VALVE ADJUSTING PROCEDURE in THIS SECTION. AIR IN PILOT END CAPS Air accumulation in the pilot end caps of the wrist/clamp/accumulating control valve can cause the clamp arms to behave in a sluggish manor. To bleed the air: Pressurize the hydraulic tank to approximately 5 psi and loosen the suspected pilot end cap fitting to release the air. After completion, tighten the fittings and re-adjust the pressure in the hydraulic tank.

1. Park machine on level ground, lower the felling head to the ground, engage the swing brake and stop engine.

2. Ensure that hydraulic oil is at operating temperature.

3. Connect a 0 - 5000 psi.. pressure gauge to the wrist/clamp/accumulating control valve test port. The control valve is located on the fire wall behind the main valve.

4. Turn main relief adjusting nut all the way in.

5. Turn the port relief valve adjusting nuts on the wrist, clamp and accumulating arms spool sections of the control valve OUT until spring pressure is relieved and then turn adjusting nuts one full turn IN.

8. While holding the joystick thumb switch in the ACCUMULATING ARMS OPEN position (fully retracted), check gauge pressure reading.

If less than 3200 psi., readjust accumulating arms open port relief. Repeat above procedure until a gauge reading of 3200 psi is obtained.

9. While holding the joystick thumb switch in the CLAMP ARM CLOSE position (cylinder fully extended), check gauge pressure reading.

If less than 3200 psi., readjust clamp close port relief. Repeat above procedure until a gauge reading of 3200 psi is obtained.

10. While holding the joystick thumb switch in the CLAMP ARM OPEN position (cylinder fully retracted), check gauge pressure reading.

If less than 3200 psi., readjust clamp open port relief. Repeat above procedure until a gauge reading of 3200 psi is obtained.

11. Raise the boom and rotate the felling head fully to one side. While holding the joystick wrist finger switch depressed, check gauge pressure

6. Start the engine and set throttle to IDLE.

WARNING Accumulator and clamp arms open and close very rapidly. The felling head will also be rotated side to side during this procedure.

Operator must ensure that no one is near the felling head during these procedures.

18.12

Tigercat 845B Feller Buncher

Tree clamps and wrist

OUTLET SECTION

ACCUM. ARMS 'OPEN' PORT RELIEF (3200 PSI)

UPPER CLAMP ARMS 'CLOSE' PORT RELIEF (3200 PSI)

• ••

A

OPEN

B

CLOSE

• •• ••

•

CLOSE

A

B

OPEN

•

LEFT

A

B

RIGHT

WRIST 'LEFT' PORT RELIEF (3200 PSI)

••

MID INLET SECTION GAUGE TEST PORT 04 JIC

••

•

ACCUM. ARMS 'CLOSE' PORT RELIEF (3200 PSI)

UPPER CLAMP ARMS 'OPEN' PORT RELIEF (3200 PSI)

WRIST 'RIGHT' PORT RELIEF (3200 PSI)

MAIN RELIEF (2700 PSI) - 1 " WRENCH

SAW

•

GAUGE TEST PORT (FOR SAW) 04 JIC

845-19

WRIST/CLAMP/ACCUMULATING VALVE (WITH SAW SECTION)

reading.

If less than 3200 psi., readjust port relief.

Repeat above procedure until a gauge reading of 3200 psi is obtained.

12. With the boom raised, rotate the felling head fully to the other side. While holding the joystick wrist finger switch depressed, check gauge pressure reading.

If less than 3200 psi., readjust port relief.

Repeat above procedure until a gauge reading of 3200 psi is obtained. Center the felling head and lower to the ground.

13. With throttle control in the FULL position; Unscrew the main relief valve adjusting nut three full turns. While holding the joystick thumb switch in the ACCUMULATING ARMS OPEN position, check gauge pressure reading.

If less than 2700 psi, readjust main relief.

Repeat above procedure until a gauge reading of 2700 psi is obtained.

14. Remove pressure gauge.

18.13

Tigercat 845B Feller Buncher

Tree clamps and wrist

18.14