Tigercat 845 FELLER BUNCHER SERVICE MANUAL - PDF DOWNLOAD

SERVICE MANUAL TIGERCAT 845 FELLER BUNCHER TABLE OF CONTENTS

Issue 4.1, MARCH 2003

SECTION INTRODUCTION .............................................................................................................. III GENERAL SPECIFICATIONS ........................................................................................... v 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

845-SM00

845 Available Literature Operator's manual ~ English ................. Part No. 4252A Operator's manual ~ French ................. Part No. 6058A Service Manual ...................................... Part No. 4955A Parts Catalog ......................................... Part No. 4253A Hydraulic Adapters Book ....................... Part No. 1472A Hydraulic Hose assemblies Book ......... Part No. 3707A

II

Tigercat 845 Feller Buncher

Introduction

Tigercat 845 Feller Buncher

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 845 Feller Buncher Serial number 8450101 to 8450475.

The operator's manual will assist the operator with the techniques of proper and safe operation of the 845 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 Company reserves the right to change information contained herein at any time without prior notice.

Tigercat Industries Inc.

III

Tigercat 845 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 845 Feller Buncher

General Specifications

SPECIFICATIONS:

ROTATING UPPER SWING DRIVE ......... 360° continuous rotation Swing bearing, 47” ball circle dia.

Double reduction swing drive planetary gearbox with brake Piston swing motor, adjustable to10 RPM max, factory set to 7 RPM ENCLOSURE ........... Perforated plate used on side doors and rear for improved ventilation Vandal protection Smooth exterior to prevent debris accumulation

DIMENSIONS (With single grouser shoes) WIDTH Over 24” tracks .................................................... 10’ 0” LENGTH Less booms ......................................................... 14' 5" HEIGHT To top of skylight ................................................. 11’ 7” Less removable skylight .................................... 10' 11” GROUND CLEARANCE ...................................................... See below TAIL SWING ............................................................................... 7’ 1” WEIGHT With boom, less felling head ................. approx. 47,000 Lbs POWER ENGINE ............ Cummins 6CT8.3, 205 HP @2200 RPM COOLING ......... Steel finned radiator and oil cooler Suction engine fan Removable debris screen at air intake FUEL TANK ....................................................... 115 gal. (US) capacity Optional 210 gal. (US) capacity

BOOM SYSTEM (With Tigercat model 5000 bunching saw head) Maximum cut radius ....................................................................... 25’ 6” Minimum cut radius ........................................................................ 13' 2” Boom envelope (swath) .................................................................. 12’ 4” Lift capacity, Net; Full reach ...................................................... 3,000 Lbs

HYDRAULIC SYSTEM Full simultaneous control of all hydraulic functions TRACK/SWING/BOOM PUMP ...... Load sensing, var. displ. piston 90 gpm (US) @ 4,300 psi SAW PUMP .................................... Dedicated variable displ. piston, 27 gpm (US) @ 3,600 psi CLAMPS & SIDE TILT PUMP ........ Dedicated fixed displ. vane, 34 gpm (US) @ 2700 psi RESERVOIR .................................. Pressurized, 45 Gal (US) FILTRATION ................................... Full flow return, located in hydraulic reservoir BOOM CYLINDER ......................... 5.1” bore x 48” stroke STICK/TILT CYLINDERS ............... 4.3” bore x 41 1/4” stroke HORSE POWER CONTROL ......... Electronic speed sensing type

OPERATOR’S STATION CAB ............................ Fully enclosed and insulated Removable skylight Removable rear window and side sliding window Air conditioner, heater and defroster Lexan(TM) glazing on windshield, right side and door Forward sloping windshield AM/FM Stereo cassette SEAT .......................... Full extreme duty suspension, fully adjustable Armrest mounted joysticks CONTROLS ................ Hyd. proportional for boom, travel and swing Electric switch for accumulating arms, swing brake and travel speed range

TRACKS UNDERCARRIAGE ....... Track side frames include integral track guides and ramp angles at each end.

Removable roller access cover DRIVE ............................ Var. motors with integral brake valves Infinitely variable speed with low lockout TRACTIVE EFFORT ..... 48,000 Lbs GEARBOX ..................... Triple reduction planetary type with brake FRONT IDLER ............... Hydraulic track adjuster Spring shock absorber TRACK SLIDES, ........... UPPER Replaceable, welded TRACK ROLLERS, ....... LOWER (8) D6 size tractor type rollers TRACK SHOE ............... 24” Width, single grouser Optional .................... Widths up to 36” with single, double or triple grouser pattern BRAKES TRACK & SWING ................... Friction disc type Spring applied, hydraulic release Track ................................. Automatically applied Swing ................................. Manually applied from cab

OTHER STANDARD EQUIPMENT Easily cleaned radiator air intake screen Precleaner and 2 Stage engine air cleaner Alarms for drive, low hyd. oil Lighting for night operation Horn ELECTRICAL BATTERY ................... (2) 12 volt ALTERNATOR Standard .................... 130 Amp FELLING HEAD Flexible hydraulic system can be tailored to accept various felling heads including the Tigercat model 5000 bunching saw. Other O.E.M. saw or shear heads available with or without side tilt.

OPTIONAL EQUIPMENT Dry chemical fire suppression system

WE RESERVE THE RIGHT TO AMEND THESE SPECIFICATIONS AT ANY TIME WITHOUT NOTICE

131" 139"

11.25" GROUND CLEARANCE 2’ 9” TO TIP OF SINGLE GROUSER SHOE 2’ 7” TO TIP OF TRIPLE GROUSER SHOE

S04_923

TO TIP OF TOOTH

142.5" 168"

306"

85"

V

Tigercat 845 Feller Buncher

Introduction

VI

Tigercat 845 Feller Buncher

SECTION 1 - SAFETY MARCH 2003

CONTENTS - SECTION 1 BATTERY DISCONNECT SWITCH ....................................................................... 1.6 COOLING SYSTEM ............................................................................................... 1.7 EXHAUST FUMES ................................................................................................. 1.8 FIRE PREVENTION FIRE PREVENTION GUIDELINES ..................................................................... 1.9 WHAT ELSE TO DO BEFORE YOU EXPERIENCE A FIRE ................................ 1.10 WHAT TO DO AFTER A FIRE ............................................................................. 1.11 WHAT TO DO IN CASE OF A MACHINE FIRE ................................................... 1.10 FIRST AID .............................................................................................................. 1.4 FLUID LEAKS ........................................................................................................ 1.7 HYDRAULIC PRESSURE HAZARD ...................................................................... 1.7 LOOSE CLOTHING HAZARD ................................................................................ 1.8 PARKING HAZARDS ............................................................................................. 1.6 PROTECTIVE CLOTHING ..................................................................................... 1.3 SAFETY PRECAUTIONS, GENERAL .................................................................... 1.3 SAFETY PRECAUTIONS, OPERATING ................................................................ 1.5 SAFETY PRECAUTIONS, SERVICING ................................................................. 1.7 SAFETY SYMBOLS ............................................................................................... 1.2 SIGNAL WORDS ................................................................................................... 1.2

Tigercat 845 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 845 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.

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

Follow all instructions from safety inspector and supervisors.

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.

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 an untrained person operate the machine.

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 use the seat armrest or joystick as handle when entering or leaving the cab.

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.

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

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.

1.3

Tigercat 845 Feller Buncher

Safety 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.

GENERAL SAFETY PRECAUTIONS continued

Maintain a distance of 10 ft. (3m) between the machine or boom and any power line carrying up to 50,000 volts or less.

Power lines carrying more than 50,000 volts require a safety distance of 10 ft. (3m) 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.

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.

Machine should be washed completely at every major service.

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.

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

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.

Inspect the machine daily for signs of damage, unusual wear, fluid leaks, or faulty operation.

Repair or replace malfunctioning parts and systems immediately.

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

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

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.

1.4

Tigercat 845 Feller Buncher

Safety

OPERATING SAFETY PRECAUTIONS

Start the engine according to the instructions in this manual.

Never use a liquid starting aid to start an engine with a pre-heat device.

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

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

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

Before starting the engine, check to ensure that all doors, panels, and access covers are installed properly and secured.

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

Make sure that all of the controls are positioned as specified in the starting instructions in the operator's manual.

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

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

Keep the cab doors closed and use seat belt when travelling in rough terrain to prevent being thrown from the operator's cab.

Sound the machine horn before starting the machine.

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

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

Felling operations should only be performed from the operator's seat. Secure loose items in the cab.

1.5

Tigercat 845 Feller Buncher

Safety When parking the machine;

OPERATING SAFETY PRECAUTIONS continued

•

Park on level ground only and engage the swing brake.

•

Do not park on a hillside or incline.

•

Lower felling attachment onto level ground.

•

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

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

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

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

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

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

Use only prearranged and approved signalling practices.

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

Do not carry passengers either in the cab or anywhere else on the machine.

To prevent roll-over when working on slopes, travel straight up or down the slope, do not swing a felling head full of trees over the down hill side of the machine.

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.

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

1.6

Tigercat 845 Feller Buncher

Safety

SERVICING SAFETY PRECAUTIONS

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.

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.

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.

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

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 reservoir by loosening the breather cap and waiting until the sound of escaping air stops.

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. This machine is equipped with an electronic horsepower limiting control. Prior to welding, the 25 pin connector should be disconnected from the black box located on the rear inside wall of the cab .

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

1.7

Tigercat 845 Feller Buncher

Safety 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.

SERVICING SAFETY PRECAUTIONS continued Shut off engine. Only remove engine radiator filler cap when cool enough to touch with bare hands.

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

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

Dispose of fluids properly.

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

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

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.

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

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

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

Before performing work under the felling head or boom, ensure they are firmly supported.

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.

1.8

Tigercat 845 Feller Buncher

Safety dislodged by vibration this smoldering debris 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. Clean up any grease, diesel fuel, hydraulic and lubricating oil accumulation and spillage immediately.

7. 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.

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

8. 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.

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.

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

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.

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

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.

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

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

13. 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.

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

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

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

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

Continued on page 10

1.9

Tigercat 845 Feller Buncher

Safety WHAT TO DO IN CASE OF A MACHINE FIRE

FIRE PREVENTION continued Continued from page 9

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

18. 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

•

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.

•

Shut the engine off.

•

Activate the fire suppression system*

•

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.

•

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

•

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

•

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

•

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.

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.

•

•

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. 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.

1.10

Tigercat 845 Feller Buncher

Safety WHAT TO DO AFTER A FIRE

FIRE PREVENTION continued

20229A

TYPICAL FIRE EXTINGUISHER ACCESS HOLE

•

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.

1.11

•

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.

Tigercat 845 Feller Buncher

Safety

1.12

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

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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.

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using high speed disc saws safely

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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.

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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.

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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

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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.

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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.

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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

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16

®

Tigercat 845 Feller Buncher

SECTION 3 - LUBRICATION & MAINTENANCE FEB.99

CONTENTS - SECTION 3 FILTER AND LUBRICATION SCHEDULE ........................................................ 3.7 FIRST 100 HOURS ........................................................................................... 3.2 FIRST 25 HOURS ............................................................................................. 3.2 GENERAL MAINTENANCE .............................................................................. 3.3 HYDRAULIC OILS ............................................................................................. 3.6 LUBRICATION SCHEDULE .............................................................................. 3.7 NEW MACHINE MAINTENANCE ...................................................................... 3.2 THE FIRST 100 HOURS ............................................................................... 3.2 THE FIRST 25 HOURS ................................................................................. 3.2 PRESSURE SETTING PROCEDURES. See SERVICE MANUAL PRESSURE SETTING VALUES. See SERVICE MANUAL, SECTION 4 PREVENTIVE MAINTENANCE SCHEDULE ..................................................... 3.2 SCHEDULED MAINTENANCE 125 HOURS ................................................................................................... 3.4 24 HOURS: .................................................................................................... 3.4 250 HOURS ................................................................................................... 3.5 500 HOURS: .................................................................................................. 3.5 8 HOURS: ...................................................................................................... 3.4 TIGHTENING POINTS ...................................................................................... 3.2 TORQUE CHART, GENERAL ........................................................................... 3.9 TORQUE SETTINGS, RECOMMENDED .......................................................... 3.8

Tigercat 845 Feller Buncher

Lubrication and Maintenance

PREVENTIVE MAINTENANCE SCHEDULE FOR 845 FELLER BUNCHER

NEW MACHINE MAINTENANCE THE FIRST 100 HOURS:~ IMPORTANT REPLACE OIL IN:~

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

TRACK DRIVE GEARBOXES FILL TRACK DRIVE GEARBOX WITH BOTH LEVEL PLUGS IN LINE WITH THE HORIZONTAL PLANE AND ABOVE CENTER.

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

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

ENGINE AND CHANGE OIL FILTER SEE ENGINE OPERATOR'S MANUAL

AFTER THE INITIAL PRE-DELIVERY INSPECTION HAS TAKEN PLACE BY THE DEALER, PROCEED WITH THE FOLLOWING:~

REPLACE:~ ENGINE FUEL FILTER HYD. OIL RETURN FILTER, CASE DRAIN HYD. OIL PILOT PRESSURE FILTER

THE FIRST 25 HOURS:~

HYD. OIL RETURN FILTERS (IN TANK) TIGHTENING POINTS:~

CHECK:~

CHECK TORQUE ON SWING BEARING RETAINING BOLTS

HYDRAULIC OIL LEVEL TRACK DRIVE GEARBOX OIL LEVEL

ENGINE MOUNTING BOLTS

CHECK TRACK DRIVE GEARBOX WITH BOTH LEVEL PLUGS IN LINE WITH THE HORIZONTAL PLANE AND ABOVE CENTER.

PUMP MOUNTING BOLTS TRACK SHOE BOLTS TRACK ROLLER RETAINING BOLTS

TIGHTENING POINTS:~

TRACK SPROCKET RETAINING BOLTS

ALL HYDRAULIC CONNECTIONS

TRACK DRIVE GEARBOX MOUNTING BOLTS

HOSE CLAMPS

TRACK DRIVE MOTOR MOUNTING BOLTS

PIN RETAINERS

SWING GEARBOX MOUNTING BOLTS

ANY OTHER LOOSE NUT, BOLT OR FITTING

CAB SECURING BOLTS ANY OTHER LOOSE NUT, BOLT OR FITTING REFER TO DIESEL ENGINE SERVICE MANUAL AND ATTACHMENT MANUAL FOR ADDITIONAL REQUIRED MAINTENANCE AT THIS SCHEDULED TIME PERIOD. 3.2

Tigercat 845 Feller Buncher

Lubrication and Maintenance

GENERAL þ ALWAYS HAVE A FIRE EXTINGUISHER AT HAND

CAUTION ALL HANDLES, STEPS AND PLATFORMS MUST BE KEPT FREE OF GREASE, OIL, FUEL MUD, SNOW ICE AND FOREST DEBRIS

þ FOR SAFETY, ALWAYS LOWER BOOM ASSY. TO THE GROUND WHEN LEAVING CAB, LEAVING MACHINE UNATTENDED OR DURING SERVICE

þ CLEAN AROUND FILLER CAPS BEFORE CHECKING OR ADDING FLUIDS

þ CLEAN FIRE SUPPRESSION SYSTEM SENSORS

þ CLEAN AROUND HYDRAULIC FITTINGS BEFORE BREAKING CONNECTION. PLUG OR CAP IMMEDIATELY þ CLEAN UP SPILLS AS SOON AS POSSIBLE þ ALWAYS RELEASE PRESSURE IN HYDRAULIC TANK BEFORE BREAKING A CONNECTION þ ALWAYS USE CLEAN OIL AND CONTAINERS þ DRAIN DIRTY OIL WHILE STILL WARM þ DO NOT EXCEED RECOMMENDED FLUID LEVELS þ SERVICE ALL HYDRAULIC FILTERS AFTER THE FAILURE OF A PUMP, MOTOR, CYLINDER OR VALVE. FAILURES OF THIS NATURE COULD CONTAMINATE THE ENTIRE HYDRAULIC SYSTEM þ TOP UP DIESEL FUEL AT EACH SHIFT TO REDUCE CONTAMINATION BY CONDENSATION þ CLEAN UP OIL SPILLS ON WALKING SURFACES IN ENGINE ENCLOSURE IMMEDIATELY þ BEFORE WELDING ON MACHINE BE SURE THE NEGATIVE BATTERY TERMINAL AND THE SPEED CONTROL 25 PIN CONNECTOR IN THE CAB ARE DISCONNECTED. þ WHEN WELDING SECURE GROUND CONNECTION AS CLOSE TO WORKING POSITION AS POSSIBLE TO PREVENT ARCING ACROSS MACHINED SURFACES OR THROUGH BEARINGS þ CLEAN AWAY ALL BRANCHES, BARK AND CHIPS. CLEAN UP ALL TRACES OF OIL TO AVOID FIRES

3.3

Tigercat 845 Feller Buncher

Lubrication and Maintenance

SCHEDULED MAINTENANCE • FOR LOOSE NUTS, BOLTS AND FITTINGS

FREQUENTLY:~

• CONDITION AND TENSION OF FAN BELTS.

• CHECK ENGINE COOLING AIR INTAKE SCREENS FOR POSSIBLE RESTRICTION

• VISUALLY CHECK CONDITION OF TRACKS. • CONDUCT AN OVERALL VISUAL INSPECTION.

8 HOURS:~

REFER TO DIESEL ENGINE SERVICE MANUAL AND ATTACHMENT MANUAL FOR ADDITIONAL REQUIRED MAINTENANCE AT THIS SCHEDULED TIME PERIOD.

• PERFORM FREQUENTLY MAINTENANCE AND IN ADDITION:~ • CHECK ENGINE COOLANT LEVEL • CHECK ENGINE OIL LEVEL

24 HOURS:~

• DRAIN FUEL/WATER SEPARATOR

• PERFORM FREQUENTLY MAINTENANCE

• CHECK AIR INTAKE PRECLEANER CLEAN BOWL AS REQUIRED

• PERFORM 8 HOUR MAINTENANCE

• CHECK HYDRAULIC OIL LEVEL

AND IN ADDITION:~

LUBRICATE:~

• LUBRICATE SWING BEARING; 1-FITTING - 10 SHOTS

• SWING PINION; 1-FITTING - 10 SHOTS • ¯BOOM JOINTS; 6-FITTINGS - PURGE • ¯CYLINDERS; BOOM, STICK & TILT; 6-FITTINGS TOTAL - PURGE

125 HOURS:~ • PERFORM FREQUENTLY MAINTENANCE

¯ LUBRICATING CYLINDER PINS AND

• PERFORM 8 HOUR MAINTENANCE

BOOM JOINTS:-

• PERFORM 24 HOUR MAINTENANCE

1. PARK MACHINE ON LEVEL GROUND

AND IN ADDITION CHECK:~

2. COMPLETELY TILT FELLING HEAD BACK

• RETURN FILTERS RESTRICTION INDICATOR WITH ENGINE RUNNING AT HIGH IDLE AND OIL FLOW

3. FULLY EXTEND STICK BOOM CYLINDER 4. FORCE HEEL OF FELLING HEAD ONTO GROUND

• HIGH PRESSURE PILOT FILTER RESTRICTION INDICATOR WITH ENGINE RUNNING AT HIGH IDLE AND OIL FLOW

5. WHILE IN THIS POSITION LUBRICATE ALL CYLINDER RETAINING PINS AND BOOM JOINTS

• CHECK TRACK DRIVE GEARBOX OIL LEVEL WITH BOTH LEVEL PLUGS IN LINE WITH THE HORIZONTAL PLANE AND ABOVE CENTER.

NOTE: THIS PROCEDURE WILL ALLOW GREASE TO FLOW TO THE NORMALLY "LOADED SIDE" OF THE PIN/BEARING SURFACES

• FLUID LEVEL IN BATTERIES UNLESS MAINTENANCE FREE • ENGINE R.P.M.

CLEAN:~

• ALL HYDRAULIC PRESSURES

• OIL COOLER, ENGINE RADIATOR AND ENCLOSURE SCREENS

• HYDRAULIC PUMP AND MOTOR SECURING BOLTS

• REMOVE POTENTIALLY DAMAGING LIMBS OR STICKS

• TORQUE TIGHTENING POINTS AS PER NEW MACHINE MAINTENANCE

CHECK:~ • FOR LEAKAGE AROUND HYDRAULIC COMPONENTS AND FLEXIBLE HOSES

Continued on page 5

3.4

Tigercat 845 Feller Buncher

Lubrication and Maintenance

SCHEDULED MAINTENANCE Continued from page 4

REPLACE:~

VISUALLY CHECK FOR DAMAGE TO:~

• OIL IN TRACK DRIVE GEARBOXES FILL TRACK DRIVE GEARBOX WITH BOTH LEVEL PLUGS IN LINE WITH THE HORIZONTAL PLANE AND ABOVE CENTER.

• MAIN AND STICK BOOMS • TRACKS, TRACK FRAMES AND CARBODY • SWING BEARING AREA • ATTACHMENT

• REPLACE ENGINE OIL AND FILTER

MAKE REPAIRS IMMEDIATELY

• REPLACE ENGINE FUEL FILTER

VISUALLY INSPECT FOR:~

• REPLACE AIR INTAKE PRIMARY ELEMENT

• FRAYED ELECTRICAL WIRING AND HYDRAULIC HOSES • WEAR IN ANY OTHER COMPONENTS

500 HOURS:~

CLEAN/REPLACE:~

• PERFORM FREQUENTLY MAINTENANCE

• INSPECT FOR DEBRIS BUILDUP BETWEEN RADIATOR AND OIL COOLER. REMOVE COVER PLATE UNDER RADIATOR TO ACCESS CLEANOUT PANELS

• PERFORM 8 HOUR MAINTENANCE

• AIR CONDITIONER RE-CIRCULATION FILTER

• PERFORM 250 HOUR MAINTENANCE

• PERFORM 24 HOUR MAINTENANCE • PERFORM 125 HOUR MAINTENANCE

AND IN ADDITION REPLACE:~

• CAB FRESH AIR FILTER

• AIR INTAKE SAFETY ELEMENT

REFER TO DIESEL ENGINE SERVICE MANUAL AND ATTACHMENT MANUAL FOR ADDITIONAL REQUIRED MAINTENANCE AT THIS SCHEDULED TIME PERIOD.

• HYD. OIL RETURN FILTER, CASE DRAIN • HYD. OIL RETURN FILTERS (IN TANK) • HYD. OIL PILOT PRESSURE FILTER LUBRICATE:~

250 HOURS:~

• DOOR AND COVER HINGES 12 FITTINGS - 1 SHOT

• PERFORM FREQUENTLY MAINTENANCE

CHECK:~

• PERFORM 8 HOUR MAINTENANCE

• TORQUE ON SWING BEARING AND SWING GEARBOX RETAINING BOLTS

• PERFORM 24 HOUR MAINTENANCE • PERFORM 125 HOUR MAINTENANCE

• TORQUE ON TRACK DRIVE GEARBOXES AND MOTOR MOUNTING BOLTS

AND IN ADDITION:~ LUBRICATE:~ • SWING DRIVE GEARBOX LOWER BEARING; 1-FITTING - 10 SHOTS¯ NOTE: DO NOT USE A POWER GREASE GUN ¯WITH GEARBOX AT OPERATING TEMPERATURE ADD 10 SHOTS OF GREASE. GREASE SHOULD PURGE FROM VENT FITTING. CAUTION: GREASE SHOULD FLOW EASILY, DO NOT APPLY EXCESSIVE FORCE OR GEARBOX FAILURE MAY RESULT. 3.5

• TRACK ROLLERS AND IDLERS FOR OIL LEAKAGE. THESE COMPONENTS ARE FILLED WITH OIL AND CONSIDERED MAINTENANCE FREE. IF OIL LEAKAGE IS DETECTED REPAIR OF COMPONENT(S) WILL BE NECESSARY. REFER TO DIESEL ENGINE SERVICE MANUAL AND ATTACHMENT MANUAL FOR ADDITIONAL REQUIRED MAINTENANCE AT THIS SCHEDULED TIME PERIOD

Tigercat 845 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.

3.6

REF. NUMBER

EVERY 500 HOURS

EVERY 250 HOURS

EVERY SHIFT 8 HOURS EVERY 125 HOURS

FIRST 100 HOURS

FIRST 25 HOURS

Tigercat 845 Feller Buncher

CHK CHANGE COOLANT 1 EVERY 2 YEARS

Lubrication and Maintenance

FILTER AND LUBRICATION SCHEDULE DESCRIPTION COOLING SYSTEM 50% ANTIFREEZE 50% WATER

CAPACITY REMARKS/LUBRICANT LITRE USG No. 38 10 19L (5 USG) ANTIFREEZE ** 19L (5 USG) DISTLD. WATER

REP CHK

REP

2

ENGINE OIL/FILTER CUMMINS 'B' CUMMINS 'C'

REP

REP

3

FUEL FILTER (ENGINE)

1

REP

4

FUEL/WATER SEPARATOR

1

5

AIR INTAKE PRECLEANER

1

CLEAN BOWL AS REQ'D

6

AIR INTAKE PRIMARY ELEMENT

1

CHECK FILTER RESTRICTION INDICATOR WITH ENGINE RUNNING

AIR INTAKE SAFETY ELEMENT

1

DRN CHK

REP

REP 7 CHK

CHK

8

REP

HYDRAULIC RESERVOIR

16.4 18.9

170

4.3 5

45

SEE ENGINE MANUFACTURER’S SERVICE MANUAL

1

DRAIN AND REFILL AS REQ’D

BY SEASONAL OIL CHANGE SEE APPROVED HYD. OILS CHECK RESTRICTION INDICATOR

REP 9

RETURN FILTER, CASE DRAIN

1

CHECK FILTER RESTRICTION INDICATOR ON FILTER WITH ENGINE RUNNING AT FULL AND WITH OIL FLOW

REP

CHK

REP 10

RETURN FILTERS, (IN TANK)

2

REP

CHK

REP 11

PRESSURE FILTER, PILOT*

1

*CHECK RESTRICTION INDICATOR ON LATER MACHINES

CHK D/R

CHK D/R

12

CHK 13

TRACK DRIVE GEARBOX; CHECK OIL LEVEL WITH BOTH LEVEL PLUGS IN LINE WITH THE HORIZONTAL PLAN AND ABOVE CENTER. TRACK ROLLERS AND IDLERS CHECK FOR OIL LEAKAGE

6

1.5

2

FILL WITH S 75W-90 SYNTHETIC GEAR OIL

7.6

2

1

IF LEAKING REMOVE AND REPAIR FILL WITH SAE 30 OR 40

*** LUB 24 HRS

14

SWING BEARING ***

10 SHOTS

1

GREASE WHILE SWINGING ***EVERY 24 HOURS LITHIUM BASE EP2 GREASE u

LUB

15

SWING PINION

10 SHOTS

1

GREASE WHILE SWINGING LITHIUM BASE EP2 GREASE u

SWING GEARBOX LOWER BEARING

10 SHOTS

1

LITHIUM BASE EP2 GREASE u

LUB*

16

*REFER TO 250 HOURS SCHEDULED MAINTENANCE FOR DETAILS

LUB

17

BOOM AND STICK JOINTS

PURGE

7

LITHIUM BASE EP2 GREASE u

LUB

18

BOOM, STICK AND TILT CYLINDERS

PURGE

8

LITHIUM BASE EP2 GREASE u

DOOR(S) AND ROOF HINGES

1 SHOT

12 LITHIUM BASE EP2 GREASE u

LUB 19 20

FELLING ATTACHMENT

SEE MANUFACTURERS MAINTENANCE SCHEDULE

u LITHIUM BASED EP2 GREASE CONTAINING MOLYBDENUM DISULFIDE

**ANTIFREEZE MUST MEET GM 6038M SPECIFICATIONS • SEE ENGINE MANUFACTURERS MAINTENANCE MANUAL LEGEND: CHK - CHECK REP - REPLACE DRN - DRAIN D/R - DRAIN AND REFILL LUB - LUBRICATE ISSUE 5 0299

3.7

Tigercat 845 Feller Buncher

Lubrication and Maintenance

TORQUE CHART LOCATION

THREAD DIAMETER

TORQUE (LUBRICATED) lbf-ft Nm

Cylinders Piston nut, hoist boom cyl.

Piston nut, stick/tilt cyl.

Cylinder end cap bolts hoist cyl. stick/tilt cyl.

Pin retaining bolts

3/4" UNC

5559 3485 715 410 282-310

7560 4740 972 558 393-420

Boom joint pin bolts

3/4" UNC

282-310

393-420

Cab securing bolts

1" UNC

682-750

617-679

Swing bearing Swing bearing bolts Swing gearbox mounting bolts

7/8" UNC 5/8" UNC

450-500 160-175

620-680 215-235

Engine mounting Bolts, bracket/mount to chassis Bolts, bracket to engine, front Bolts, bracket to engine, rear

7/8" UNC 7/16" UNC M12-1.75

450-500 52-57 40

620-680 71-77 54

Pump drive Drive plate to flywheel Bell housing to engine

3/8" UNC M10-1.5

33-36 25

45-49 34

Undercarriage Track shoe bolts Idler bolts Roller mounting bolts Sprocket bolts Gearbox mounting bolts Drive motor mounting bolts

3/4 UNF M16 3/4" UNC M20 M20 M20

T/T* 200 280 380 380 380

T/T* 275 380 515 515 515

*T/T represents Torque-Turn, this is a method of torquing the track shoe bolts. Refer to SECTION 11 in the Tigercat SERVICE MANUAL for a complete description of this method of applying torque.

Torque values pertaining to the engine and attachment are provided in the appropriate manuals.

3.8

Tigercat 845 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

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 2 395

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

3.9

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

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

Tigercat 845 Feller Buncher

Lubrication and Maintenance

3.10

Tigercat 845 Feller Buncher

SECTION 4 - HYDRAULIC SYSTEM CONTENTS - SECTION 4 CIRCUIT SCHEMATIC SERIAL NO. 8450101 & 8450102 ....................................................................... 4.17 SERIAL NO. 8450103 TO 8450249 ..................................................................... 4.18 SERIAL NO. 8450261 TO 8450475 ..................................................................... 4.19 HIGH PRESSURE LIMITING CONTROL VALVE SET LOAD SENSE RELIEF VALVE .................................................................... 4.31 HYDRAULIC OIL RESERVOIR CHANGING HYDRAULIC OIL FILTERS ............................................................. 4.3 CHANGING HYDRAULIC OIL STRAINERS ....................................................... 4.5 DESCRIPTION ................................................................................................... 4.3 PRESSURE REGULATOR SET-UP PROCEDURE ............................................ 4.7 RESERVOIR (SERIAL NO. 8450101 TO 8450234) ............................................. 4.4 RESERVOIR (SERIAL NO. 8450235 TO 8450475) ............................................. 4.5 HYDRAULIC PUMPS CLAMP PUMP .................................................................................................... 4.10 MAIN PUMP ....................................................................................................... 4.9 MAIN PUMP CONTROL VALVE ................................................................................... 4.29 MAIN PUMP WEAR TEST ............................................................................................ 4.9

SAW .................................................................................................................... 4.10 SAW AND CLAMP PUMP ................................................................................... 4.10 HYDRAULIC SYSTEM OPERATION BOOM CYLINDERS ........................................................................................... 4.2 CLAMP ARMS AND WRIST CIRCUIT ................................................................ 4.2 MAIN CIRCUIT DESCRIPTION .......................................................................... 4.16 FLOW ON DEMAND AND LOAD COMPENSATION ................................................... 4.16

MAIN HYDRAULIC CIRCUIT .............................................................................. 4.16 MAIN HYDRAULIC SYSTEM .............................................................................. 4.2 MARGIN PRESSURE ......................................................................................... 4.10 PILOT CIRCUIT .................................................................................................. 4.2 SAW CIRCUIT .................................................................................................... 4.2 SWING SYSTEM ................................................................................................ 4.2 TRACK DRIVE SYSTEM .................................................................................... 4.2 LOAD SENSING BASIC DESCRIPTION CLOSED CENTRE SYSTEM ....................................................................................... 4.13 OPEN CENTRE SYSTEM ............................................................................................ 4.12

BASIC PRINCIPALS ........................................................................................... 4.11 MARGIN PRESSURE ......................................................................................... 4.10 OPERATING TIPS .............................................................................................. 4.14 SET LOAD SENSE RELIEF VALVE .................................................................... 4.31 SET MARGIN PRESSURE ................................................................................. 4.29 MAIN CONTROL VALVE BOOM FUNCTIONS SPOOL SECTIONS ........................................................... 4.20 CONTROL VALVE SECTIONS ............................................................................ 4.20 CONTROL VALVE SPOOL OPERATION ............................................................ 4.23 DESCRIPTION ................................................................................................... 4.20 DRIVE MOTOR SPOOL SECTIONS .................................................................. 4.20 HIGH PRESSURE LIMITING CONTROL VALVE ................................................ 4.28 PORT RELIEF AND ANTICAVITATION VALVE ................................................... 4.22 ADJUSTING PROCEDURE ......................................................................................... 4.22

PRESSURE SETTINGS ........................................................................................ 4.32

FEB. 99

Tigercat 845 Feller Buncher

Hydraulic system

HYDRAULIC SYSTEM OPERATION

3. CLAMP ARMS AND WRIST CIRCUIT

The hydraulic system has four separate circuits;

This is an open-centre circuit with a fixed displacement vane pump and spool valve. The return oil from the open centre circuit is cooled by the oil cooler and then flows to the return filters in the hydraulic tank. Refer to TREE CLAMPS AND WRIST description in SECTION 18 of this manual.

1. Variable-displacement main hydraulic circuit.

2. Variable-displacement circuit for the saw.

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

4. Closed-centre pilot circuit.

4. PILOT CIRCUIT The pilot circuit gets its oil from the main closed centre circuit which is reduced to the 425 psi by the pilot supply valve. The pilot system is turned on and off by the pilot supply control valve which is controlled by the ignition switch, armrest switch and the pilot reset button. Refer to PILOT SYSTEM description in SECTION 5 of this manual.

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.

Boom cylinders

This feature improves fuel economy and cuts back on heat generation because power is not wasted on excess pump flow that is not being used. Refer to LOAD SENSING HYDRAULIC SYSTEM in THIS SECTION.

The boom cylinders have built-in cushions on both ends. The stick and tilt cylinders have cushions on the extension side only. All cylinder rods are ground, heat treated, chrome plated and polished.

The horsepower limiting control is one which ensures that the engine will not lug down below the full load rpm by reducing the output from the main hydraulic pump. Refer to ENGINE ANTI-STALL description in SECTION 9 of this manual.

Track drive system The track drive system has high-torque, axialpiston hydraulic motors mounted to a planetary drive so they are completely within the track shoe width. The motors include counterbalance valves to control over-running load situations and wet multiple-disc springapply hydraulic-release brakes which automatically release when driving and apply when stationary. Independent control of the tracks permits counter-rotation. Refer to TRACK DRIVE in SECTION 11 of THIS MANUAL.

The main control valves are pressure and flow compensated to provide load independent operation for all functions.

2. SAW CIRCUIT This open centre circuit uses a variabledisplacement pressure-compensated piston pump which delivers oil to the variabledisplacement bent-axis piston motor on the saw through a saw control valve. The main saw control valve is pilot operated and controls the flow of hydraulic oil from the pump to the motor. A relief valve is installed in the inlet section of the main saw control valve.

Swing system This system has a piston motor with crossover relief valves and a double reduction planetary gearbox which provides variable swing speeds from 0 to 7 rpm. A rotary manifold provides hydraulic connection to the undercarriage of the vehicle and permits continuous 360 degree swing. A multi-disc wet brake is installed between the motor and gearbox and is controlled with a switch on the instrument panel. The brake is spring-apply hydraulic-release and will apply whenever the pilot oil supply is shut off. Refer to SWING in SECTION 15 of THIS MANUAL.

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

4.2

Tigercat 845 Feller Buncher

Hydraulic system

HYDRAULIC OIL RESERVOIR

FILTER/STRAINER SERVICE NOTE

Also refer to SECTION 2 of THIS MANUAL for additional service information.

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

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

If the FILTER BYPASS warning light in the cab comes ON between the scheduled maintenance intervals, Stop the machine and change these filter elements.

The reservoir basically consists of two compartments, a filter box and a reservoir.

The filter box, which is a sealed compartment within the reservoir collects and filters all the hydraulic oil as it returns back to the reservoir.

The reservoir is pressurized utilizing turbocharger air from the engine and regulated to 3 psi. by a regulator.

SERVICE NOTE:

It should also be noted that this light could come ON at start up due to cold weather conditions. In this case refer to SYSTEM TEST AND WARM UP in SECTION 2 of the OPERATOR'S MANUAL. CHANGING HYDRAULIC OIL FILTERS Refer to illustrations of EARLIER and LATER design hydraulic reservoirs.

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.

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

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

All return oil entering the reservoir, except for 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 reservoir will turn on the FILTER BYPASS warning light in the cab before this happens.

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

A hydraulic oil immersion heater can be installed for use in cold weather conditions.

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

4. Release air from tank by opening air vent ball valve or loosening breather cap on earlier machines. Do not remove.

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. On earlier machine slowly remove air bleed caps.

6. Disconnect and remove both hoses from filter covers.

7. Remove filter covers and filter bypass valves.

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

The pump is also used to initially pressurize the hydraulic reservoir to 3 PSI. Refer to SECTION 2 OF THE OPERATORS MANUAL for this procedure.

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 reservoir. This return port is also used to collect the pump 'case drain' return oil and receive new oil from the hand fill pump.

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

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 and/or tighten breather cap.

11. 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 Continued on page 4

4.3

Tigercat 845 Feller Buncher

Hydraulic system •

AIR BLEED CAP

•

•

FILTER COVER

•

'O' RING

BYPASS VALVE

FILTER

•

BREATHER CAP

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

•

•

FILTER BOX

•

STRAINER COVER

• RETURN TUBE

'O' RING OIL HEATER

• •

•

(OPTIONAL)

•

SUCTION STRAINERS

•

CROSS SECTION 'A' 'A' 845-23

• •

• DRAIN PLUG

HYDRAULIC RESERVOIR (Serial Number 8450101 to 8450234)

Continued from page 3

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.

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.

12. To remove air from filter box on earlier machines that did not use air bleed hoses; Loosen air bleed caps and bleed air from filter box, Slowly increase engine RPM until air begins to flow from from caps. Retighten caps when clean oil emerges from under caps.

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

NOTE: Changing filters tends to aerate the 4.4

Tigercat 845 Feller Buncher

Hydraulic system •

AIR BLEED CONNECTION

•

•

FILTER COVER

•

'O' RING

BYPASS VALVE

FILTER

•

FILTER BOX

FILTER BOX

5 PSI. VENT/FILTER

BALL VALVE, AIR VENT

•

• AIR BLEED HOSE

•

•

PRESS. GAUGE, HYD. TANK AIR REGULATOR

• • •

FROM PUMP CASE DRAIN

• •

RETURN TUBES

• TURBO AIR FROM ENGINE

• STRAINER COVER WITH 'O' RING SEAL

•

(OPTIONAL)

SUCTION TUBES

• •

•

•

• FROM HAND FILL PUMP

CROSS SECTION 'A' 'A' OIL HEATER

OIL LEVEL SENDERS

•

•

SIGHT GAUGE

845-26

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

• DRAIN PLUG

SUCTION STRAINERS

HYDRAULIC RESERVOIR (Serial Number 8450235 to 8450475)

CHANGING HYDRAULIC OIL STRAINERS

remove air bleed caps.

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

6.

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

7. Disconnect and remove both air bleed hoses from filter covers (on later machines).

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

8.

Remove filter covers and filter bypass valves.

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.

4. Release air from tank by opening air vent ball valve (when installed) or loosening breather cap. Do not remove.

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. On earlier machine slowly

Remove drain plug and completely drain oil from hydraulic tank.

10. Disconnect wire to temperature sender on strainer cover.

Continued on page 6

4.5

Tigercat 845 Feller Buncher

Hydraulic system 19. Close air vent ball valve and/or tighten breather cap.

Continued from page 5

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

20. 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.

12. Unbolt strainer cover and carefully remove from tank. Note orientation of cover for reinstallation.

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

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

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

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

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.

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

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

18. Bleed air from the Linde pump pipe by loosening the plug on the top face of the flange at pump inlet. Bleed air from the Denison pump pipe by loosening pump top case plug.

4.6

Tigercat 845 Feller Buncher

Hydraulic system

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

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

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 1 or 2 days.

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.

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.

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.

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 4.7

Tigercat 845 Feller Buncher WRIST AND CLAMPS PUMP

Hydraulic system BELL HOUSING

MAIN PUMP (LINDE)

SAW PUMP

• •

• •

•

100-3

PUMP ASSEMBLY (Serial No. 8450101 to 8450249)

MAIN PUMP CONTROL VALVE

SAW PUMP LOAD SENSING COMPENSATOR

•

100-1-1

PUMP ASSEMBLY (Serial No. 8450101 to 8450249)

HYDRAULIC PUMPS

SERIAL NO. 8450261 to 8450475 The pump rear of the main pump is used for the saw. It is a Linde HPR piston pump with load sensing (not used) and pressure compensator.

All hydraulic functions are powered by three pumps mounted on the flywheel housing of the engine. The first pump is a Linde HPR piston pump with load sensing and horsepower limiting controls used for traction, swing and boom functions.

The last pump is a Denison fixed vane pump and is used for the clamps, accumulating arm and wrist function.

SERIAL NO. 8450101 to 8450249 The next pump is used for the saw, it is a pressure compensated piston pump which is combined with a fixed vane pump. These pumps are mounted one behind the other as shown.

4.8

Tigercat 845 Feller Buncher

Hydraulic system SAW PUMP PRESSURE COMPENSATOR

SAW PUMP

WRIST AND CLAMPS PUMP

•

•

•

•

• BELL HOUSING

MAIN PUMP (LINDE)

221-24A

PUMP ASSEMBLY (Serial No. 8450261 to 8450475)

MAIN PUMP

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).

5

Record the flow coming out of the main pump case drain.

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

When all of the 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 the spring force, swashplate forces and the control pressure forces are balanced. See pump schematic figure 853sm15.

MAIN PUMP WEAR TEST 1

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

2

Run the machine until the hydraulic oil temperature reaches at least 140°F.

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. 4.9

Normal/acceptable case drain leakage rates 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.

Tigercat 845 Feller Buncher

Hydraulic system pump output pressure exceeds the LS pressure by a small amount. This differanceis known as MARGIN PRESSURE (Also known as differential pressure Delta P).

Refer to SET MARGIN PRESSURE in this section.

Also refer to VERIFY ANTI-STALL SOLENOID SETTING (H.P. CALIBRATION) in this section.

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.

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.

Also refer to ENGINE ANTI-STALL in SECTION 9 HIGH PRESSURE LIMITING CONTROL

853sm15

MAIN PUMP & LOAD SENSE CONTROL SCHEMATIC DIAGRAMS

LINDE MAIN VALVE MANIFOLD

• •

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

'P' GAUGE TEST CONN.

•• •• L.S. GAUGE TEST CONN.

The pump then adjusts its output volume until the HORSEPOWER CALIBRATION DO NOT ADJUST

ENGINE ANTI-STALL SOLENOID VALVE

•

103-17A

HIGH PRESSURE LIMITING CONTROL

of this manual.

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

GAUGE TEST PORT 'X1' ANTI-STALL SIGNAL PRESSURE

• • MARGIN PRESSURE ADJUSTING SCREW

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

•

WRIST AND CLAMPS PUMP The wrist and clamps pump is a vane pump driven off the back of the saw pump. For information on this circuit, refer to SECTION 18 of THIS MANUAL.

MAIN PUMP

• 103-18A

••

MAIN PUMP CONTROLLER (LS CONTROL)

4.10

Tigercat 845 Feller Buncher

Hydraulic system

LOAD SENSING

W

853SM18

USED

FIG. 1

FIXED DISPLACEMENT PUMP

PRESSURE FIG. 2

853SM16

HP =CO

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 FLOW

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.

NST ANT

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.

FLOW

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

WASTED

W

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

USED

853SM19

FIG. 3

HP REGULATED PUMP

PRESSURE FIG. 4 853SM16

HP =C ON ST AN

FLOW

T

∆p LS W USED PRESSURE

853SM17

FIG.5

LOAD SENSING (FLOW ON DEMAND) 4.11

FIG.6

853SM16

Tigercat 845 Feller Buncher

Hydraulic system

flow adjustments (throttling). SEE FIGS. 5 & 6.

LOAD SENSING BASIC DESCRIPTION OPEN CENTRE VS. CLOSE CENTRE

853SM21

maximum flow position the open center passage is completely blocked, and all of the pump flow is forced against the load.

853SM20

OPEN CENTRE SYSTEM: 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

If the oil flowing to the motor or cylinder meets

853SM21 853SM20

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.

blocked off when the spool is in neutral, and unblocked when the spool begins to move).

When the control valve lever is moved to actuate a cylinder or motor, the open center passage is

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.

853SM20

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.

When the control valve lever is fully shifted to the

4.12

Tigercat 845 Feller Buncher

Hydraulic system

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

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.

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 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 p.s.i. 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

The key component in the system above is the spring in the stroking piston. The pump’s output

853sm22

853sm22

pressure must be 250 p.s.i. higher than the load pressure to compress the spring and reduce the flow of the pump. This 250 p.s.i. is the differential 853sm22

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.

The following are key differences from open centre systems;

853sm22

or margin pressure.

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

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 p.s.i. 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 p.s.i. 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 4.13

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.

Continued on page 14

Tigercat 845 Feller Buncher

Hydraulic system

Continued from page 13

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.

OPERATING TIPS 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.

4.14

Tigercat 845 Feller Buncher

Hydraulic system

4.15

Tigercat 845 Feller Buncher

Hydraulic system continue to receive oil regardless of their pressure and without further movement of the control levers.

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

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.

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.

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 pressure applied to the spool to move functions independant of load pressure.

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 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.

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

4.16

Tigercat 845 Feller Buncher

845-01

Hydraulic system

MAIN HYDRAULIC CIRCUIT ~ Serial Number 8450101 & 8450102 4.17

Tigercat 845 Feller Buncher

845-02

Hydraulic system

MAIN HYDRAULIC CIRCUIT ~ Serial Number 8450103 to 8450249 4.18

Tigercat 845 Feller Buncher

845-42

Hydraulic system

MAIN HYDRAULIC CIRCUIT ~ Serial Number 8450261 to 8450475 4.19

Tigercat 845 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.

BOOM FUNCTIONS SPOOL SECTIONS 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.

2 3 1

SCHEMATIC DIAGRAM OF MANIFOLD & A VALVE SECTION WITH RELIEF

853SM24

4.20

Tigercat 845 Feller Buncher

Hydraulic system

MAKE UP OR ANTICAVITATION VALVE

WORK PORTS

•

MAKE UP OR ANTICAVITATION VALVE

•

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 FUNCTIONS

90919

WORK PORTS

ANTICAVITATION RELIEF VALVE MAX. FLOW ADJUSTING SCREW

•

ANTICAVITATION RELIEF VALVE

• •

•

• • • MAIN CONTROL SPOOL RETURN 'T'

90744

90744-2

PUMP 'P'

RETURN 'T'

COMPENSATOR

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

CONTROL VALVE SECTION - TYPICAL FOR CYLINDER OPERATED FUNCTIONS (SHOWN IN FLOW POSITION) 4.21

Tigercat 845 Feller Buncher

Hydraulic system

PORT RELIEF AND ANTICAVITATION VALVE OPERATION

RELIEF AND MEDIUM HOLLOW SYSTEM ANTICAVITATION PISTON 'C' POPPET 'B' 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.

PILOT POPPET 'D'

• WORK PORT

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.

• •

•

• 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.

•

WORK PORT

• RETURN

RELIEF OPERATION

90744-6A

During anticavitation operation the main poppet will retract to allow oil to flow from the return passage into the work circuit. During normal operation and relief operation oil pressure on surface held the main poppet against it's seat.

This pressure decreases as pressure in the work circuit decreases. The return oil pressure on the surface moves the main poppet and piston against the springs to open the valve.

LOW WORK PORT PRESSURE

•

WORK PORT

• RETURN 90744-5A

ADJUSTING PROCEDURE

ANTICAVITATION OPERATION

1. Loosen locknut.

PORT RELIEF VALVE

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

LOCKNUT • 17mm WRENCH

•

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

•

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.

• MAIN VALVE BODY

90744-4

4.22

ADJUSTING SCREW • 5mm ALLEN KEY

MAIN VALVE PORT RELIEF VALVE

Tigercat 845 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

BALANCE VALVE

SHUTTLE VALVE

PILOT END CAP

•

•

•

• CENTERING SPRING

•

•

•

LOAD SENSING PASSAGE 'LS'

•

•

•

WORK PORT 'A'

RETURN PASSAGE 'T'

• •

• •

•

LOAD SENSING PASSAGE 'LS' RETURN PASSAGE 'T'

WORK PORT 'B'

SUPPLY PASSAGE 'P'

• 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 853SM26

• LS PORT JUST OPENED • ONLY SPOOL ACTUATED

(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.

4.23

Tigercat 845 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.

4.24

Tigercat 845 Feller Buncher PILOT OIL

Hydraulic system SHUTTLE VALVE CONTROL SPOOL FULLY SHIFTED TO RIGHT

(1) COMPENSATOR VALVE

•

• • •

•

•

•

•

•

•

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

LOAD SENSING PASSAGE 'LS'

(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 COMPENSATOR JUST VALVE OPENED

(2) SHUTTLE VALVE MOVES TO RIGHT

(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.

4.25

Tigercat 845 Feller Buncher SHUTTLE VALVE

PILOT OIL

•

Hydraulic system COMPENSATOR VALVE

•

CONTROL SPOOL

•

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’.

4.26

Tigercat 845 Feller Buncher PILOT OIL

Hydraulic system

(2) COMPENSATOR VALVE SETTLES IN A BALANCE POSITION

(1) CONTROL SPOOL FULLY SHIFTED TO RIGHT

•

• •

•

•

•

•

•

•

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

LOAD SENSING PASSAGE 'LS'

(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.

4.27

Tigercat 845 Feller Buncher

Hydraulic system

HIGH PRESSURE LIMITING CONTROL VALVE

MAIN CONTROL VALVE MANIFOLD

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. 4050 psi, (Gauge at 'L.S.' test port) which in turn limits the pump output pressure to 4300 psi. (Gauge at 'P' test port) The 250 psi differential is known as margin pressure. See SET MARGIN PRESSURE in THIS SECTION.

•

SYSTEM RELIEF VALVE NON-ADJUSTABLE P1. SCREWED FULLY IN NOT USED

Margin pressure is the differance 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.

• HIGH PRESSURE LIMITING CONTROL

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

PAB18-1

853SM24

P2 L.S. PRESSURE LIMIT, SET AT 4050 PSI. GAUGE ON L.S. TEST PORT • 4mm ALLEN KEY • 13mm WRENCH

HIGH PRESSURE LIMITING CONTROL VALVE

SCHEMATIC DIAGRAM OF H.P.L. CONTROL, MANIFOLD & A VALVE SECTION WITH PORT RELIEFS 4.28

Tigercat 845 Feller Buncher

Hydraulic system

PILOT PRESSURE 11.3 mm

ENGINE ANTI-STALL PROPORTIONAL SOLENOID VALVE

•

•

• ANTI-STALL CALIBRATION

TANK

DO NOT ADJUST

LOAD SENSE PRESSURE

REQUIRES TEST BENCH FOR READJUSTMENT GAUGE TEST PORT 'X1'

•

•

•

•

•

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 MARGIN PRESSURE is the difference pump. The pressure gauge connections are between the LOAD SENSE pressure and the the 'L.S.' and 'P' gauge test ports on the Linde PUMP OUTPUT pressure while a function main valve manifold. (boom, swing or travel) is being operated. For HIGH the load sensing system to operate correctly LINDE MAIN PRESSURE VALVE the differential pressure between L.S. and 'P' LIMITING MANIFOLD • CONTROL should be 250 psi. 'P' being higher than L.S.

90669

SET MARGIN PRESSURE

•

**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

•

•• •

ENGINE ANTI-STALL SOLENOID VALVE

•

L.S. GAUGE TEST CONN.

GAUGE TEST PORT 'X1' ANTI-STALL SIGNAL PRESSURE

103-17A

•

•

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

* MAIN PUMP

• 103-18A

••

GAUGE TEST PORTS

The margin pressure is set at the factory to 250 psi. The margin pressure can be adjusted up to 300 psi, however the flow stops on the valves must be reset in order to maintain the same speed of the functions.

• MARGIN PRESSURE ADJUSTING SCREW

'P' GAUGE TEST CONN.

MAIN PUMP CONTROLLER (LS CONTROL)

4.29

If a differential pressure gauge is not available, one single 0-5000 psi gauge may be used; First placing it on the L.S. test port and noting the reading, Then on 'P' test port and noting the reading. 'P' should be 250 psi greater than 'L.S.'.

Tigercat 845 Feller Buncher

Hydraulic system

2. With hydraulic oil at operating temperature, Connect one side of the differential pressure gauge to the L.S. 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.

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

4. Press PILOT RESET button to activate pilot system and turn anti-stall switch OFF. 5. Turn swing brake ON and place SWING joystick lever in FULL 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 250 psi**. (Turn OUT to decrease Margin pressure).

If only one 0-5000 psi gauge is being used; It should first be connected to the L.S. test port and the reading noted, it should then be connected to the 'P' test port and the margin pressure adjusting screw adjusted until reading on gauge is 250 psi** greater than the 'L.S.' previously noted reading.

NOTE: This is a sensitive adjustment, significant changes in pressure will be noticed with only a small movement of the adjusting screw.

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.

4.30

Tigercat 845 Feller Buncher

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.

HIGH PRESSURE LIMITING CONTROL

•• •

'P2' RELIEF VALVE

LINDE MAIN VALVE MANIFOLD

•

'P' GAUGE TEST CONN.

• •• L.S. GAUGE TEST CONN. 103-17A

GAUGE TEST PORTS

2. Start engine and set throttle control to FULL position (approx. 1500 RPM).

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.

4.31

Tigercat 845 Feller Buncher

Hydraulic system

PRESSURE SETTINGS (HYDRAULIC OIL TEMPERATURE AT 130°F) 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) START 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) START 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 ........................................ 2200 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(4050 PSI AT 'LS' PORT) BOOM PORT RELIEFS ........................................................ 4700 PSI (CRACKING PRESSURE) STICK PORT RELIEFS ........................................................ 4700 PSI (CRACKING PRESSURE) TILT PORT RELIEFS ........................................................ 4700 PSI (CRACKING PRESSURE) MARGIN PRESSURE ........................................................ 250 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) START OF REGULATION .................................................... 3200 PSI SPEED .................................................................................. 1250 - 1300 RPM MOTOR 'X' DIMENSION ....................................................... 22MM (0.88") OF 100MM (3.94") SAW MOTOR (Tigercat DT5501) START 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) START 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

NOTE: The above values are for referance purposes only, SEE SERVICE MANUAL FOR SETTING PROCEURES.

ISSUE 7 798

4.32

Tigercat 845 Feller Buncher

SECTION 5 - PILOT SYSTEM FEB. 99

CONTENTS - SECTION 5 ACCUMULATOR .................................................................................................... 5.5 CIRCUIT SCHEMATIC SERIAL NO. 8450101 TO 8450464 ..................................................................... 5.7 SERIAL NO. 8450465 TO 8450475 ..................................................................... 5.8 ELECTRICAL CIRCUIT DESCRIPTION ................................................................ 5.5 FOOT PEDAL AND CONTROL VALVE EXPLODED VIEW .................................... 5.11 JOYSTICK CONTROL VALVE DESCRIPTION ...................................................... 5.9 JOYSTICK HANDLE AND CONTROL VALVE EXPLODED VIEW ......................... 5.10 PILOT FILTER SERIAL NO. 8450101 TO 8450464 ..................................................................... 5.3 SERIAL NO. 8450465 TO 8450475 ..................................................................... 5.3 PILOT OIL CIRCUIT DESCRIPTION ..................................................................... 5.2 PILOT SUPPLY MANIFOLD ................................................................................... 5.4 PILOT SUPPLY VALVE SERIAL NO. 8450101 TO 8450260 ..................................................................... 5.2 SERIAL NO. 8450261 TO 8450475 ..................................................................... 5.2 SET PILOT FLOW CONTROL SERIAL NO. 8450101 TO 8450260 ..................................................................... 5.5 SET PILOT PRESSURE ........................................................................................ 5.6

Tigercat 845 Feller Buncher

Pilot system

PILOT OIL CIRCUIT

The relief valve is adjustable from 25 psi to a maximum of 425 psi which should not be exceeded due to the pressure limit of the main valve end caps. Turning the screw in increases the pressure setting.

The pilot hydraulic circuit operates at 425 psi and is supplied with oil from the main pump via the Linde main control valve.

On earlier machines; The pilot system pressure is controlled by the pilot supply valve which consists of a flow control valve and relief valve.

On later machines (S/N 8450261 and up); The pilot supply valve is a pressure reducing relief valve. This pressure reducing/relieving valve is adjustable from 125 psi to a maximum of 1500 psi. The correct setting is 425 psi. Turning the screw IN increases the pressure setting.

The flow control valve is a cartridge valve which can be adjusted from 0.1 to 6 gpm rate of flow. The normal setting for this flow control valve is five turns OUT from a fully IN position. The total travel on the adjustment is 5 turns, turning the screw IN reduces flow.

This adjustment controls the flow to the pilot circuit.

After leaving the pilot supply valve the oil is filtered by an inline pressure filter before entering the pilot manifold. On earlier machines this filter is a cartridge filter with a built-in differential pressure relief valve, if the pressure differential at the oil filter exceeds 50 psi this valve will bypass the pilot oil back to the tank. This will also result

Pilot system pressure is controlled by the relief valve and is adjusted to 425 psi.

PILOT GAUGE TEST PORT PILOT FILTER

••

PILOT MANIFOLD PILOT SUPPLY VALVE

• • ••

MAIN VALVE

••

104-3

PILOT SYSTEM 5.2

Tigercat 845 Feller Buncher

Pilot system FLOW CONTROL VALVE CARTRIDGE

LOCKNUT ADJUSTING SCREW

• PILOT FILTER

• •

••

• PILOT RELIEF VALVE CARTRIDGE

PILOT SUPPLY VALVE Serial No. 8450101 to 8450260

102-10

ADJUSTING SCREW

•

LOCKNUT PRESSURE REDUCING/RELIEVING VALVE CARTRIDGE

221-14A

100-5

PILOT FILTER Serial No. 8450101 to 8450464

• CLOG INDICATOR

•

•

PILOT SUPPLY VALVE Serial No. 8450261 TO 8450475

in low pilot pressure. If a loss of controls or slow response is experienced the filter element may need to be changed.

On later machines (Serial no. 8450465 to 8450475) a High Pressure filter is used and is placed ahead of the pressure reducing/relieving valve instead of after it, there by filtering the pilot oil before it goes into the pressure reducing/ relieving valve. this filter incorporates a clog indicator. The 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

221-15A

5.3

PILOT FILTER - HIGH PRESSURE Serial No. 8450465 TO 8450475

Tigercat 845 Feller Buncher 0-1000 PSI GAUGE TEST PORT ON PILOT MANIFOLD P1 PORT

'P1' PORT/GAUGE TEST PORT

•

'T' TANK PORT

•

INLET PORT

PILOT SUPPLY CONTROL

•

• •

ACCUM. OPEN

•

CLAMP CLOSE

•

WRIST LEFT

•

ACCUM. CLOSED

•

CLAMP OPEN

•

WRIST RIGHT

•

SWING BRAKE

•

TRACK LOW

•

'T' TANK CONNECTION

Pilot system

PILOT SUPPLY MANIFOLD

••

•• PILOT SUPPLY CONTROL VALVE SOLENOID

•• • 221-16A

PILOT SUPPLY MANIFOLD show GREEN. When a pressure differential of 72 psi builds up inside the filter, indicating a possible clogged filter, the indicator will change to RED. This condition could happen during cold start-ups, but as the oil warms up the indicator will automatically re-set to GREEN.

PILOT SUPPLY MANIFOLD

221-25A

NOTE: The indicator will not remain in the "clogged" (RED) position when the pilot system is not being used.

The pilot oil is distributed by the pilot supply manifold.

This manifold consists of: an inlet port, which receives oil from the pilot filter, Two outlet 'P' pressure ports to feed the joysticks/foot pedals and main pump controller and two 'T' tank ports. A bank of solenoid operated pilot valves on the manifold when energized supply pilot oil to all the functions listed in fig. 221-25A. The first solenoid valve on the manifold controls oil entering the pilot manifold from the oil filter, this is the "pilot supply control", It is mounted on the manifold beside the "inlet" port.

5.4

When this solenoid is energized, (armrest down and pilot reset) pilot oil is supplied to the pilot circuit. The accumulator, which was introduced on later machines, is also charged up (pressurized).

When this solenoid valve is de-energized, (armrest up) pilot oil is blocked to all pilot actuated functions, joystick functions, foot pedal functions, clamps, saw (on later machines) and anti-stall. On later machines the accumulator is also drained.

Tigercat 845 Feller Buncher

Pilot system SET PILOT FLOW CONTROL (SERIAL NO. 8450101 TO 8450260) 1. The engine need not be running to adjust the flow control valve.

ADJUSTING SCREW LOCKNUT

•• • •

221-18A

PILOT RELIEF VALVE CARTRIDGE

ACCUMULATOR Serial No. 8450261 TO 8450475

102-10

FLOW CONTROL VALVE CARTRIDGE

PILOT SUPPLY VALVE Serial No. 8450101 to 8450260

2. Loosen locknut on flow control valve and turn adjusting screw all the way IN (clockwise) until resistance is encountered. Do not overtighten or damage to the valve seat will result.

The accumulator will ensure that the controls remain responsive by maintaining optimum pilot pressure. This prevents the pilot pressure from dipping when several functions are activated at the same time.

The electrical circuit; (Refer to Schematic diagram), The pilot supply control valve solenoid is not energized until the armrest is down and the pilot reset button is pushed. When this button is pushed, 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 supply 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 supply control valve solenoid when the armrest switch is open (armrest up).

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 supply control valve returning to the normally closed position. This prevents pilot oil pressure from reaching the controls.

5.5

3. Turn adjusting screw OUT 5 FULL TURNS (counterclockwise). Tighten locknut.

Tigercat 845 Feller Buncher

Pilot system

SET PILOT PRESSURE (ALL MACHINES)

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 : On earlier machines it may be necessary to "Tee" into the pilot manifold P1 port connection and install a gauge test port adapter to connect the gauge on to.

PILOT SUPPLY 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, therefore:2. Turn anti-stall switch OFF. 3. Loosen locknut and turn adjusting screw all the way OUT on pilot supply relief valve cartridge (earlier machs.) or pressure reducing/relieving valve (later machs.), tighten locknut on adjusting screw.

•• PILOT SUPPLY MANIFOLD

221-16A

4. Start engine and place throttle control in IDLE position.

FLOW CONTROL VALVE CARTRIDGE

LOCKNUT

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

6. Loosen locknut on pilot supply relief valve cartridge (earlier machs.) or pressure reducing/ relieving valve (later machs.) and turn adjusting screw until pressure gauge at pilot manifold reads 250 psi.

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**.

ADJUSTING SCREW

• • • • PILOT RELIEF VALVE CARTRIDGE

7. Using the L.H. joystick, swing upper frame with swing brake ON to raise system pressure, turn adjusting screw until pressure gauge at pilot manifold reads 425 psi.

8. Tighten locknut on pilot relief valve adjusting screw, stop engine, remove gauge and reinstall cap.

102-10

ADJUSTING SCREW

•

LOCKNUT

• PILOT REDUCING/ RELIEVING VALVE CARTRIDGE

221-14A

5.6

PILOT SUPPLY VALVE Serial No. 8450101 to 8450260

•

PILOT SUPPLY VALVE Serial No. 8450261 TO 8450475

Tigercat 845 Feller Buncher

845-03

Pilot system

PILOT SUPPLY CIRCUIT (Serial No. 8450101 to 8450464) 5.7

Tigercat 845 Feller Buncher

845-40

Pilot system

PILOT SUPPLY CIRCUIT (Serial No. 8450465 TO 8450475) 5.8

Tigercat 845 Feller Buncher

Pilot system

JOYSTICK CONTROL VALVE

OPERATING DESCRIPTION

This pilot valve is a manually operated directional control valve and operates on the same principal as a direct operating pressure reducing valve.

Both the joystick and foot control valves use similar spool arrangements.

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 return spring (4).

Operated by hand this valve directs pilot pressure 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 cylinder.

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 position of the joystick or foot pedal and the regulating spring characteristic.

•

5

•

1

• 1

• • •

4

•

2

3

• • •

•

8

'P' port

•

WORK PORTS 1, 2, 3 OR 4

AU013-1

SPOOL ARRANGEMENT

AU013-2

•

5

T

••• •• • P T 2 JOYSTICK PILOT VALVE

5858A

853SM13

FOOT PEDAL SCHEMATIC

853SM14

JOYSTICK PILOT VALVE SCHEMATIC 5.9

4 3 8 2

Tigercat 845 Feller Buncher

AW002-A,B,E

Pilot system

JOYSTICK HANDLE AND CONTROL VALVE 5.10

Tigercat 845 Feller Buncher

AU009

Pilot system

FOOT PEDAL AND CONTROL VALVE 5.11

Tigercat 845 Feller Buncher

Pilot system

5.12

Tigercat 845 Feller Buncher

SECTION 6 - ELECTRICAL, GAUGES AND ALARMS FEB. 99

CONTENTS - SECTION 6 GAUGES AND ALARMS ........................................................................................ 6.9, 6.10 CHART ............................................................................................................... 6.9 SCHEMATIC DIAGRAM SERIAL NO. 8450101 TO 8450465 .............................. 6.10 SCHEMATIC DIAGRAM SERIAL NO. 8450466 TO 8450475 .............................. 6.11 MACHINE SCHEMATIC DIAGRAMS SERIAL NO. 8450101 TO 8450270 ..................................................................... 6.2, 6.3 SERIAL NO. 8450271 TO 8450465 ..................................................................... 6.4, 6.5 SERIAL NO. 8450466 TO 8450475 ..................................................................... 6.6, 6.7, 6.8 SWITCH AND SENSOR LOCATIONS ................................................................... 6.12 WIRE COLOUR CODE CHART ............................................................................. 6.8

Tigercat 845 Feller Buncher

845-04 (2365B R2)

Electrical, gauges and alarms

MACHINE SCHEMATIC DIAGRAM (Machine Serial No. 8450101 to 8450270) SHEET 1 OF 2 6.2

Tigercat 845 Feller Buncher

845-05 (2365B R2)

Electrical, gauges and alarms

MACHINE SCHEMATIC DIAGRAM (Machine Serial No. 8450101 to 8450270) SHEET 2 OF 2 6.3

Tigercat 845 Feller Buncher

845-34 (4977B R0)

Electrical, gauges and alarms

MACHINE SCHEMATIC DIAGRAM (Machine Serial No. 8450271 to 8450465) SHEET 1 OF 2 6.4

Tigercat 845 Feller Buncher

845-35 (4977B R0)

Electrical, gauges and alarms

MACHINE SCHEMATIC DIAGRAM (Machine Serial No. 8450271 to 8450465) SHEET 2 OF 2 6.5

Tigercat 845 Feller Buncher

845-36 (5604B 01)

Electrical, gauges and alarms

MACHINE SCHEMATIC DIAGRAM (Machine Serial No. 8450466 to 8450475) SHEET 1 OF 3 6.6

Tigercat 845 Feller Buncher

845-37 (5604B 01)

Electrical, gauges and alarms

MACHINE SCHEMATIC DIAGRAM (Machine Serial No. 8450466 to 8450475) SHEET 2 OF 3 6.7

Tigercat 845 Feller Buncher

845-38 (5604B 01)

Electrical, gauges and alarms

MACHINE SCHEMATIC DIAGRAM (Machine Serial No. 8450466 to 8450475) 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) 6.8

Tigercat 845 Feller Buncher

Electrical, gauges and alarms

GAUGES AND ALARMS For a more complete description of the gauges and warning lights listed below, refer to SECTION 2 of THIS MANUAL.

The 845 is monitored for proper operation by sensors 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.

SENSOR FUNCTION

GAUGE RANGE

LIGHT

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 @ 3 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): 115/435; Opt. 210/795 Hydraulic oil - low ........................... - ...............

Hydraulic oil -Very low .................... - ...............

Hydraulic oil filter bypass ................ - ...............

Pump inlet ....................................... - ...............

ON ON ON ON

............. - ............................ 6 Gal. (27L) below Full ...... SOUNDS .................... 12 Gal. (64L) below Full ............. - .............. Return filter restriction, 15 psi or greater ............. - ................ Pump inlet pressure drops below 1 psi

Back-up alarm ................................ - ..................- ........ SOUNDS ........... One or both drive pedals in reverse Horn ................................................ - ..................- ........ SOUNDS ................. Push button on L.H. joystick *NOTE: Horn will sound when key is in "RUN" position with engine "OFF" due too low oil pressure.

COOLANT TEMP. GAUGE

ENGINE OIL PRESSURE GAUGE

* WITHOUT WARNING LIGHT

* WITHOUT WARNING LIGHT

HOURS METER * WITHOUT WARNING LIGHT

HYDRAULIC OIL TEMP. GAUGE * WITHOUT WARNING LIGHT

IMPORTANT REPLACEMENT INFORMATION

VOLTAGE METER

FUEL GAUGE

* WITHOUT WARNING LIGHT

* WITHOUT WARNING LIGHT

ENGINE R.P.M. GAUGE

6.9

When replacing gauges that include an integral warning light, replace them with the appropriate gauge (without warning light) and sender as illustrated*.

Refer to parts catalog for part numbers.

Tigercat 845 Feller Buncher

845-06

Electrical, gauges and alarms

GAUGES AND ALARM SCHEMATIC DIAGRAM (Machine Serial No. 8450101 to 8450465) 6.10

Tigercat 845 Feller Buncher

845-39

Electrical, gauges and alarms

GAUGES AND ALARM SCHEMATIC DIAGRAM (MACHINE SERIAL NO. 8450466 TO 8450475) 6.11

Tigercat 845 Feller Buncher PUMP INLET PRESSURE SWITCH (LIGHT)

ENGINE START RELAY

•

•

•

Electrical, gauges and alarms ENGINE OIL PRESSURE SENDER (GAUGE)

BATTERY DISCONNECT SWITCH

ENGINE COOLANT TEMPERATURE SWITCH(HORN)

ENGINE OIL PRESSURE SWITCH (HORN AND HOUR METER GAUGE)

•

•

•

•

•

VIEW 'A' VIEW 'B' BATTERIES

HYDRAULIC OIL TANK

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)

•

Ü

•

'A'

FUEL LEVEL SENDER (GAUGE)

FUEL TANK

•

• HYDRAULIC OIL FILTER BYPASS SWITCH (LIGHT)

•

ENGINE COOLANT TEMPERATURE SENDER (GAUGE)

ENGINE OIL PRESSURE SWITCH (HORN AND HOUR METER GAUGE)

• • •

Û'B'

• • FUEL TANK

OPERATOR'S CAB

HORN (PUSH BUTTON ON L.H. JOYSTICK) 845-24

ENGINE OIL PRESSURE SENDER (GAUGE)

ENGINE COOLANT LEVEL SENDER (LIGHT AND HORN)

SWITCH AND SENSOR LOCATIONS 6.12

Tigercat 845 Feller Buncher

SECTION 7 - ENGINE START AND STOP MAY 98

CONTENTS - SECTION 7 ELECTRICAL CIRCUIT DESCRIPTION ................................................................ 7.2 ENGINE STARTING CIRCUIT ............................................................................... 7.2 OPERATING CONDITION CIRCUIT ...................................................................... 7.3 PILOT RESET CIRCUIT ........................................................................................ 7.3 SAW SWITCH 'ON' AT START UP CIRCUIT ......................................................... 7.3

Tigercat 845 Feller Buncher

Engine start and stop

ELECTRICAL CIRCUIT The engine starting circuit is protected by a series of relays which prevent the starting of the engine while any boom or drive functions are engaged.

When entering the machine after a shut down period, the engine may be started by use of the key switch which is turned to the start position and released to the run position after the engine starts.

If for any reason the engine stalls during operation of the vehicle, the key switch must be turned to the off position to reset the protection system and then the engine may be started as above.

The circuit description is as follows (see FIGURE 1): Voltage is supplied to the start circuit through wire 6, the function lock out relay, and wire 9 to the start relay.

When the key switch is turned to the start position, voltage is supplied to the coil on the start relay which closes the relay contacts and connects wire 9 to wire 16. This supplies voltage to the start solenoid relay coil which closes the contacts on the relay thus energizing the starter solenoid causing the starter to turn the engine.

If the function lock out relay coil is energized, voltage is not available in wire 9 and the engine cannot be started. This will prevent accidental starting of the engine when the machine is operating however, if this condition exists when one is trying to start the engine, the voltage must be removed from the function lock out relay coil to unlatch the relay. This can be done in two ways; by turning the key switch off, or by lifting the arm rest which opens the arm rest switch. For engine starting procedures refer to the appropriate section of the OPERATOR'S MANUAL.

845-07

In order to operate the machine functions after starting the engine, the arm rest must be in the latched down position and the pilot reset button pushed. This will energize the coil on the function lock out relay which will connect wire 6 to wire 33 and disconnect wire 6 from wire 9, see FIGURE 2. Wire 33 supplies voltage to the arm rest switch which in turn supplies voltage back to the coil of the function lock out relay through a diode and wire 11. This holds the relay in a latched condition until the voltage in wire 6 disappears or the arm rest is lifted, see FIGURE 3. The diode in the circuit prevents voltage from being applied to the pilot shut off valve solenoid when the reset button is pressed with the arm rest in the up position.

With the function lock out relay latched in the energized position, the pilot supply valve solenoid is energized and pilot oil is available to the pilot solenoid valves, joystick valves and foot pedal valves. Voltage is also available at the saw switch.

When the saw switch is in the off position at the time the function lock out relay is energized, the saw relay coil is energized through the first set of contacts on the saw switch and the relay contacts are closed to provide voltage to the second set of contacts on the saw switch. The saw relay is held in a latched condition by a jumper on the saw switch from terminal 2B to terminal 4. This second set of contacts on the saw switch supplies the voltage to the solenoid on the saw valve. This prevents starting of the saw blade in the event that the saw switch was left in the on position when the vehicle was shut off, see FIGURE 4. If this was the case, the saw may be started by first turning the switch off and then back on.

ENGINE STARTING CIRCUIT (FIG 1) 7.2

Tigercat 845 Feller Buncher

845-08

845-09

845-10

Engine start and stop

PILOT RESET CIRCUIT (FIG 2)

OPERATING CONDITION CIRCUIT (FIG 3)

SAW SWITCH 'ON' AT START UP CIRCUIT (FIG 4) 7.3

Tigercat 845 Feller Buncher

Engine start and stop

7.4

Tigercat 845 Feller Buncher

SECTION 9 - ENGINE ANTI-STALL FEB. 99

CONTENTS - SECTION 9 CIRCUIT SCHEMATICS ............................................................... 9.4, 9.5, 9.6 CONTROL MODULE IN CAB ...................................................... 9.2 ENGINE ANTI-STALL CURVE ..................................................... 9.3 FAULT FINDING PROCEDURE ~ ANTI-STALL QUICK CHECK . 9.4 FAULT FINDING PROCEDURES, ADDITIONAL ......................... 9.6 HORSEPOWER LIMITING CONTROL ........................................ 9.2 GENERAL DESCRIPTION ....................................................... 9.2. SEE ALSO SECTION 4 HORSEPOWER LIMITING CONTROL CIRCUIT DIAGRAM SERIAL NUMBER 8450101 TO 8450405 ................................. 9.4 SERIAL NUMBER 8450451 TO 8450465 ................................. 9.5 SERIAL NUMBER 8450466 TO 8450475 ................................. 9.6 LOAD SENSE; SET MARGIN PRESSURE. SEE SECTION 4 SET PILOT PRESSURE. SEE SECTION 5 SOLENOID VALVE ....................................................................... 9.2 SPEED SENSOR ON FRONT OF ENGINE ................................. 9.2 VERIFY ANTI-STALL SETTING. SEE SECTION 4

Tigercat 845 Feller Buncher

Engine anti-stall

HORSEPOWER LIMITING CONTROL

GAUGE TEST PORT 'X1'

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 destrokes 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.

TANK PORT

LOAD SENSE PRESS. PORT

•• SOLENOID VALVE

••

•• ••

••

A Linde system is used and incorporates the following components:

MAIN PUMP

•

A control module mounted on the rear wall of the cab interior.

•

A speed sensor mounted on the back of the engine above the flywheel (Cummins).

•

A solenoid valve mounted on the HPR pump.

PILOT PRESS.PORT

HPR REGULATOR VALVE

•• WIRING HARNESS

SOLENOID VALVE ON MAIN PUMP A wiring harness.

103-18A

•

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 needed. 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 should be running at MAXIMUM RPM with the throttle control pulled out completely and the anti-stall switch should be ON. The control module in the cab receives and distributes signals through a 25 pin connector which is attached to the wiring harness.

The pins on the 25 pin connector are connected as follows: Refer to Horsepower limiting control diagrams;

HPCON-03

•

CONTROL MODULE IN CAB

NOTE: On later machines (S/N 8450451 and up) pin 1 is connected to "power" through the 2 amp fuse.

SPEED SENSOR

••

105-2

Pin 1 is connected to the anti-stall switch in the instrument panel.

SPEED SENSOR ON ENGINE

9.2

•

Pin 13 is connected to ground.

•

Pin 6 is jumpered to Pin 17, (Pin 5 is jumpered to Pin 17 for Mach. Serial Nos. 8450101 & 0102)

•

Pin 18 is jumpered to Pin 20.

•

Pin 14 is connected to the speed sensor on the flywheel housing.

Tigercat 845 Feller Buncher •

Engine anti-stall ADJUSTING SPEED SENSOR

Pin 11 and Pin 16 are connected to the solenoid on the main pump.

1. Stop engine.

NOTE: On later machines (S/N 8450451 and up) pin 11 is connected to the solenoid through the switch in the instrument panel.

2. Loosen locknut on speed sensor.

The system control module constantly monitors the engine speed and any drop in RPM from 2200 will result in a signal being sent to the main pump solenoid via wires 91, 92 (and 82 on later machines) from pins 11 and 16. This signal causes the solenoid valve to shift which directs pressure from the pilot system to shift the displacement control valve causing the pump to destroke. This electical 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.

3. Screw speed sensor IN until it touches fly wheel.

4. Turn speed sensor OUT one full turn.

5. Tighten locknut.

NOTE : Before welding anywhere on the machine the 25 pin connector should be disconnected from the control module.

Machine 845-0101

"X1" (psi)

* This value RPM X1* (psi) 350 may vary by 2260 0 as much as 2212 300 This Reading ± 50 psi ± 20psi from 6 one machine 2198 7 250 to another.

2182 40 Do not try to 2168 78 200 Horsepower Limiting adjust 2155 115 Controller pressure.

2152 120 150 This table is 2133 175 for referance 100 2112 240 purposes only.

2098 275 50 2064 310 These readings 0-15 psi 2062 310 0 2041 310 1700 1800 1900 2000 2100 2200 2300 2400 RPM 2018 310 PRESSURE INCREASES FROM 0 - 310 PSI (APPROX.) 2014 315 WITHIN A RANGE OF APPROX. 100 RPM. 1961 315 1785 ENGINE 315ANTI-STALL CURVE ~ ENGINE RPM vs. PSI X1-XLS 9.3

Tigercat 845 Feller Buncher

Engine anti-stall

FAULT FINDING ~ ANTI-STALL QUICK CHECK

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 detemine 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.

•

845-11

X1 pressure should be greater than 320 psi.

HORSEPOWER LIMITING CONTROL CIRCUIT (SERIAL NUMBER 8450101 TO 8450405) 9.4

Tigercat 845 Feller Buncher

Engine anti-stall Expected Results: • The boom should not move initially.

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.

•

As the engine speed approaches full speed, the boom should begin to move.

`

The point where the boom begins to move should be between 2050 to 2150 rpm.

3. Place anti-stall switch in the ON position.

4. Fully activate MAIN BOOM UP function.

Expected Results: • Boom up function should operate normally.

•

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.

845-44

HORSEPOWER LIMITING CONTROL CIRCUIT (SERIAL NUMBER 8450451 TO 8450465) 9.5

Tigercat 845 Feller Buncher

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.

B. ENGINE POWER NOTE: Before performing this procedure make sure that all relavent 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.

2. Start engine and place throttle in maximum position.

1. Place reflector on engine crank shaft pulley.

3. Measure engine no load maximum speed with a phototach.

2. Start engine and place throttle in maximum position

The engine speed should be verified with a phototach and the measured speed should be compared to the panel tach if one is installed.

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.

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.

845-43

HORSEPOWER LIMITING CONTROL CIRCUIT (SERIAL NUMBER 8450466 TO 8450475) 9.6

Tigercat 845 Feller Buncher

Engine anti-stall I.

C. PILOT PRESSURE. 1. Ensure pilot pressure is correct.

To verify PILOT PRESSURE refer to PILOT SYSTEM in SECTION 5 of THIS MANUAL.

2. Measure resistance between pins 12 and 14 or pins 13 and 14 on connector • The resistance should be:

D. MARGIN PRESSURE 1. Ensure margin pressure is correct.

3000 ±300 ohms ... Tigercat model 853; 860; John Deere 6076, 6081.

To verify MARGIN PRESSURE refer to HYDRAULIC SYSTEM in SECTION 4 of THIS MANUAL.

960 ±150 ohms ..... Tigercat model 845; Cummins 'C' engine.

3. Check for shorts from pin 14 to chassis.

(Pin 12 or 13 is connected to ground)

E. ELECTRICAL POWER TO ANTI-STALL CONTROL MODULE. 1. Remove connector from anti-stall control module.

J.

2. Start engine.

3. Measure DC voltage across pins 1 and 13 on connector.

• The electrical power should be 13 ±2VDC F.

SPEED SENSOR WIRES 1. Remove connector from anti-stall control module.

SPEED SENSOR COIL 1. Remove connector from anti-stall control module.

2. Measure resistance of speed sensor coil.

• The resistance should be: 3000 ±300 ohms ... Tigercat model 853; 860; John Deere 6076, 6081.

SOLENOID VALVE WIRES. 1. Remove connector from anti-stall control module.

960 ±150 ohms ..... Tigercat model 845; Cummins 'C' engine.

2. Measure resistance between pins 11 and 16 on connector.

• The resistance should be 6.6 ±2 ohms 3. Check for shorts to chassis.

G. SOLENOID VALVE COIL 1. Remove DIN connector from anti-stall (VD3) solenoid valve.

2. Measure resistance of solenoid coil.

• The resistance should be 6.6 ±2 ohms.

H. SPEED SENSOR OUTPUT 1. Remove connector from anti-stall control module.

2. Start engine and place throttle in maximum position.

3. Measure the AC voltage across pins 12 and 14 or pins 13 and 14 on connector.

• The speed sensor output should be >5VAC. 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) 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.

9.7

Tigercat 845 Feller Buncher

Engine anti-stall

9.8

Tigercat 845 Feller Buncher

SECTION 11 - TRACK DRIVE CONTENTS - SECTION 11 BRAKE DESCRIPTION SERIAL NO. 8450101 & 8450102 ....................................................................... 11.9 SERIAL NO. 8450103 TO 8450475 ..................................................................... 11.13 CIRCUIT SCHEMATICS SERIAL NO. 8450101 AND 8450102 .................................................................. 11.5 DRIVE MOTOR SERIAL NO. 8450101 & 8450102 REXROTH ..................................................................................................................... 11.2, 11.6

SERIAL NO. 8450103 TO 8450475 LINDE, MOTOR START-UP PROCEDURE .................................................................. 11.14

HYDRAULIC SYSTEM SERIAL NO. 8450101 & 8450102 DESCRIPTION ............................................................................................................. 11.2

SERIAL NO. 8450103 TO 8450475 DESCRIPTION ............................................................................................................. 11.10

PRESSURE SETTINGS SERIAL NO. 8450101 & 8450102 DRIVE MOTOR CROSS LINE RELIEF ........................................................................ 11.3 DRIVE MOTOR PRESSURE OVERRIDE(P.O.R.) ....................................................... 11.4

SERIAL NO. 8450103 TO 8450475 DRIVE MOTOR CROSS OVER RELIEF VALVE .......................................................... 11.15 DRIVE SPEED CHANGE VALVE ................................................................................. 11.15 TEST PROCEDURE: .................................................................................................... 11.15

TRACK COMPONENTS BOTTOM ROLLER RETAINING BOLTS ............................................................. 11.22 MEASURING TRACK SAG ................................................................................. 11.20 TRACK SAG ADJUSTMENT ........................................................................................ 11.21

OPERATING THE MACHINE .............................................................................. 11.20 TORQUING UNDERCARRIAGE BOLTS ............................................................ 11.21 TRACK SHOE RETAINING BOLTS .................................................................... 11.21 WEAR LIMITS BOTTOM ROLLER WEAR ............................................................................................ 11.23 BUSHING WEAR, OUTSIDE DIAMETER .................................................................... 11.23 IDLER WEAR ................................................................................................................ 11.24 PIN AND BUSHING WEAR .......................................................................................... 11.23 TRACK LINK WEAR ..................................................................................................... 11.22 TRACK SHOE GROUSER HEIGHT WEAR ................................................................. 11.22 TRACK SLIDE WEAR .................................................................................................. 11.24

TRACK SPEED ADJUSTMENTS SERIAL NO. 8450101 & 8450102 SET MOTOR MINIMUM DISPLACEMENT .................................................................. 11.6 SET STRAIGHT TRAVEL ............................................................................................. 11.8 SET TRACK SPEED (OIL FLOW AT MAIN CONTROL VALVE ................................... 11.6

SERIAL NO. 8450103 TO 8450475 SET STRAIGHT TRAVEL ............................................................................................. 11.19 TRACK SPEED SET-UP PROCEDURE ...................................................................... 11.17

FEB. 99

Tigercat 845 Feller Buncher

Track drive

TRACK DRIVE HYDRAULICS DESCRIPTION

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 'A' (Refer to circuit diagram) opens and oil pressure builds up in the motor pistons.

SERIAL NO. 8450101 & 8450102 The tracks on this machine are independently controlled by foot pedal proportional pilot valves which control the spools in the main control valve.

The main control valve operation is described in SECTION 4 OF THIS MANUAL. This independent track control provides the ability to counter-rotate the tracks for maneuverability.

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 check valve 'B' to the main control valve and then to tank.

The power is transmitted to the tracks from a variable-displacement, bent-axis piston motor through a triple reduction planetary gearbox on each track frame.

The gearbox has an integral spring-apply, hydraulicrelease, multi-disc brake which is automatically released whenever the drive system is pressurized.

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, in the schematic diagram it is shown in the centre, closed position.

'M' GAUGE TEST PORT

A shuttle valve 'C' in the counterbalance valve also selects the high pressure line to the motor and directs this pressure to the brake release port through a pressure reducing valve 'D' which limits the brake release pressure to 500 psi. Check valves are also in the circuit to prevent oil pressure trapped in the motor being applied to the pilots of the counterbalance spool and to force return flow from the motors through the counterbalance valve.

The drive motor may be operated in two ranges controlled by a solenoid valve which is operated by the “LOW/DRIVE” range switch in the console.

In the “LOW” mode the solenoid on the solenoid

CROSSLINE RELIEF VALVE (REVERSE) • 17MM WRENCH • 5MM ALLEN KEY

TRACK DRIVE MOTOR

TRACK DRIVE GEARBOX

•

•

LOW/DRIVE CONTROL LINE

•

•• •

GEARBOX BRAKE LINE CROSSLINE RELIEF VALVE (FORWARD) • 17MM WRENCH • 5MM ALLEN KEY

TRMOT-1

'G' GAUGE TEST PORT • 6MM ALLEN KEY TO REMOVE PLUG

TRACK DRIVE MOTOR (REXROTH) - R.H. SIDE SHOWN (Serial No. 8450101 & 8450102) 11.2

Tigercat 845 Feller Buncher

Track drive

pilot valve is energized and the motor is in its maximum displacement mode which will give the slowest speed and maximum tractive effort. This is the mode that should be used for all harvesting operations.

DRIVE SYSTEM PRESSURE SETTINGS:

For travel modes the switch can be put in the “DRIVE” mode and the motor will be in its minimum displacement position which will give the highest 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.

NOTE: Ensure hydraulic oil is at operating temperature.

This is controlled by the pressure override control.

When the pressure in the motor reaches 3100 psi, the motor will shift to a displacement which will just maintain the pressure at 3100 psi. If the "load" demands pressures over 3100 psi the motor will shift to a greater displacement so that the motor pressure remains at 3100 psi. Once the motor reaches maximum displacement, the pressure will rise above 3100 psi until system pressure of 4300 psi is reached. If the "load" demands pressures under 3100 psi, the motor will shift to a smaller displacement so that the motor pressure remains at 3100 psi. (and maximum travel speed is obtained.) Once the motor reaches minimum displacement, the pressure will drop to the required "load" induced pressure.

The motor is also equipped with crossline relief valves which provide high pressure protection to the motor. These valves are located on the top and bottom sides of the motor.

SERIAL NO. 8450101 & 8450102 DRIVE MOTOR CROSSLINE RELIEF SETUP PROCEDURE:

Place felling head securely on ground before performing any service work. Ensure engine enclosure roof is open and safety strut in place.

1.

Remove final drive inspection cover(s).

2.

Disconnect brake release line(s) at brake port on final drive gearbox(s) and plug hose with #4 JIC plug. Cap port adapter on gearbox.

3.

If not supplied with machine, Install a pressure gauge adapter in motor 'G' port (M14).

4. Turn both crossline relief adjusting screws on motor being set fully IN (clockwise). Do not overtighten or breakage will result.

NOTE: For R.H. Track motor; FORWARD relief is at the BOTTOM and REVERSE relief is at the TOP. For L.H. Track motor; FORWARD relief is at the BOTTOM and REVERSE relief is at the TOP. 5. Connect a 0-5000 PSI pressure gauge on 'P' test port of Linde main valve manifold.

Continued on page 4

L.S. PRESSURE RELIEF VALVE ADJUSTING SCREW • 5MM ALLEN KEY • 17MM WRENCH

•• L.S. GAUGE TEST CONN.

'P' GAUGE TEST CONN.

HIGH PRESSURE LIMITING CONTROL

••

•• •• ••

LINDE MAIN VALVE MANIFOLD 103-17A

MAIN CONTROL VALVE 11.3

Tigercat 845 Feller Buncher

Track drive

Continued from page 3

6. Start engine, turn ‘DRIVE’ switch to LOW.

DRIVE MOTOR PRESSURE OVERRIDE (P.O.R.) SETUP PROCEDURE:

7.

SERIAL NO. 8450101 & 8450102

8.

9.

With engine at 1500 RPM, depress DRIVE FOOT PEDAL in BOTH directions for motor being set, CAUTION: ensure brake holds in both directions before performing any adjustments to the motors.

REXROTH TERMINOLOGY (BEGIN OF REGULATION)

Place felling head securely on ground before performing any service work. Ensure engine enclosure roof is open and safety strut in place.

With an assistant depressing a DRIVE pedal, (forward or reverse) Adjust L.S. pressure relief valve on Linde main valve manifold to 4600 PSI on pressure gauge at 'P' port. Tighten locknut on adjusting screw.

1.

Remove final drive inspection cover(s).

2.

Disconnect brake release line at brake port on final drive gearbox(s), plug hose with #4 JIC plug and cap port adapter on gearbox.

Remove 0-5000 PSI pressure gauge from 'P' port on valve manifold and connect to 'G' port on drive motor.

3.

If not supplied with machine, Install a pressure gauge adapter in motor test ports 'G' (M14) and 'M' (M12).

NOTE: Using only the one pressure gauge during this procedure will ensure an accurate setup, since no two pressure gauges are calibrated exactly the same.

4. Install 0-5000 PSI pressure gauges on 'G' and 'M' test ports of drive motor.

5. Install 0-5000 PSI gauge on 'P' test port of Linde main valve.

10. With an assistant depressing the appropriate drive pedal FORWARD; Lower the FORWARD motor crossline relief setting by slowly unscrewing adjusting screw until oil can be heard (hissing noise) flowing through the relief valve.

6. Start engine, turn ‘DRIVE’ switch to LOW. 7. Ensure that hydraulic oil is at operating temperature.

8. With engine at IDLE, depress DRIVE FOOT PEDAL in BOTH directions for drive motor being set, CAUTION: ensure brake holds in both directions before performing any adjustments to the motors.

11. Slowly raise setting (clockwise) until hissing noise stops, then turn IN a further 1/8th turn maximum.

NOTE: Observe the pressure gauge at 'G' port when making these adjustments, it will fall and rise as the adjusting screw is being turned and should show 4600 PSI prior to the 1/8th turn IN. The [4600 psi +1/8th turn] is expected to set the relief at 4800-4900 psi.

9.

With an assistant depressing a DRIVE pedal, (forward or reverse), Adjust L.S. pressure relief valve on Linde main valve to 3100 PSI. on gauge at 'P' port.

10. Turn ‘DRIVE’ switch to DRIVE, and depress drive foot pedal.

12. Tighten locknut on adjusting screw taking care NOT to turn the adjusting screw at the same time.

11. With an assistant depressing the DRIVE foot pedal, Check motor test port ‘G’ is at 3100 PSI. Turn in P.O.R. adjusting screw on motor until pressure in motor test port ‘M’ is zero.

13. Check the setting again by ensuring that the hissing noise is still absent after tightening the locknut.

12. Turn out P.O.R. adjusting screw until pressure in motor test port ‘M’ is 800-1000 PSI. Tighten locknut on adjusting screw and re-check pressure in motor test port ‘M’.

14. Perform steps 10. 11. 12 & 13 to set REVERSE crossline relief.

14. Remove pressure gauge from 'G' port on motor and reconnect to 'P' port on valve manifold.

13. Reinstall brake line and final drive inspection cover.

14. Reset L.S. pressure on Linde main valve to 4300 PSI. on pressure gauge at 'P' port.

15. Reinstall brake line and final drive inspection cover.

15. Remove all gauges.

16. Readjust L.S. pressure relief valve on Linde main valve manifold to read 4300 PSI on pressure gauge at 'P' port.

11.4

Tigercat 845 Feller Buncher

845-31

Track drive

TRACK DRIVE CIRCUIT (Serial No. 8450101 AND 8450102) 11.5

Tigercat 845 Feller Buncher

Track drive

TRACK SPEED ADJUSTMENT PROCEDURE

the distance from the end of the screw to top of nut is a maximum of 0.62" (15.75mm). Both Left and Right motors should be set as close as possible to run at the same speed.

SERIAL NO. 8450101 & 8450102 NOTE: Track speed is determined by:

SET TRACK SPEED

A. The SPOOL STOP ADJUSTING SCREW on the main control valve when travelling in the 'LOW' mode.

LOW SPEED SETTING: 1. Start engine, turn ‘DRIVE’ switch to LOW.

B. Both the SPOOL STOP ADJUSTING SCREW and the DRIVE MOTOR MINIMUM DISPLACEMENT SETTING (dimension 'X') when travelling in the 'DRIVE' mode.

2. Position felling head in vertical position and swing boom to LEFT side of machine.

C. The MOTOR MINIMUM DISPLACEMENT SETTING should first be verified as being correct before making any track speed adjustments.

4. Use blocks to firmly support track frame in raised position. DO NOT place arms, legs or

3. Place felling head on ground and by forcing down with boom controls, lift track clear of ground. (Hoist down and stick out)

SET MOTOR MINIMUM DISPLACEMENT WARNING: Improper adjustment of minimum adjusting screw can result in motor failure due to over speeding, or the tracks running at different speeds. When installing a new motor always ensure stroke limiting screw is the correct length and dimension 'X' is set correctly.

ANGLE TO BE BETWEEN 90° & 110°

1. Adjust the minimum adjusting screw so that MINIMUM DISPLACEMENT ADJUSTING SCREW - 6MM ALLEN KEY - 19MM WRENCH

845-12

'X' DIMENSION = 0.62" WITH 80MM LONG SCREW

'X'•

•

P.O.R. ADJUSTING SCREW TURN 'IN' TO INCREASE SETTING - 3MM ALLEN KEY - 10MM WRENCH

'G' PORT, 14MM ORB

PORT 'X'

•

•

•

VIEW 'A-A'

'MA' PORT

'MB' PORT

•

• 'M' PORT

• CROSSLINE RELIEF ADJUSTING SCREW • 5MM ALLEN KEY • 17MM WRENCH

•

• CROSSLINE RELIEF VALVES (2) AQ004-1A

TRACK DRIVE MOTOR (REXROTH) (Serial No. 8450101 & 8450102) 11.6

Tigercat 845 Feller Buncher

Track drive

body under track while in the raised position.

SPOOL STOP ADJUSTING SCREW • 19MM WRENCH • 6MM ALLEN KEY

5. Set engine speed to above 1500 RPM 6. With an assistant depressing 'LEFT' TRACK drive pedal 'FORWARD', record track drive gearbox R.P.M.

•

A TIMING MARK, VISIBLE FROM THE CAB CAN ALSO BE PLACED ON THE TRACK

ROTATION

853MV-2

TO RECORD TRACK SPEED, PLACE TIMING MARKS ON TRACK FRAME AND GEARBOX HOUSING

TRACK DRIVE MAIN CONTROL VALVE

FAST SPEED SETTING: 9. Set engine speed to above 1500 RPM

SET TRACK SPEED

84-18

If a reading of 13 R.P.M. is obtained no adjustment is necessary.

10. Turn ‘DRIVE’ switch to DRIVE. 11. With an assistant depressing LEFT TRACK drive pedal 'FORWARD', record track drive gearbox R.P.M. It should read 28 R.P.M

7. To obtain 13 R.P.M., adjust FORWARD spool stop adjusting screw on LEFT track main control valve, either IN (clockwise) to slow down, or OUT (counterclockwise) to speed up the final drive. Tighten locknut on adjusting screw and re-check gearbox R.P.M.

12. If this reading is incorrect, verify that the MIN. DISPL. ADJUSTING SCREW (DIMENSION 'X') is correctly set.

If the reading is considerably different, check the length of the adjusting screw (see illustration). It is most important that this

8. Repeat steps 6. and 7. to set REVERSE speed.

Continued on page 8 R.H. TRACK DRIVE

MAIN BOOM CYLINDERS

SWING

L.H. TRACK DRIVE

TILT CYLINDER

• •

•

HIGH PRESSURE STICK CYLINDER LIMITING CONTROL

CONTROL VALVE MANIFOLD

• •

•

•

•

101-1

MAIN CONTROL VALVE 11.7

Tigercat 845 Feller Buncher

Track drive SET STRAIGHT TRAVEL

Continued from page 7

screw be the correct length.

SERIAL NO. 8450101 & 8450102

13. With an assistant depressing LEFT TRACK drive pedal 'REVERSE', record track drive gearbox R.P.M. It should read 28 R.P.M. MOTOR HOUSING

•

Ensure machine is on level ground.

LOW SPEED: 1. Start engine, turn ‘DRIVE’ switch to LOW.

DIMENSION 'X' = 0.62" WITH 80MM LONG SCREW

2. Equally depress both drive pedals in 'FORWARD' position. Machine should travel straight.

•

3. If machine drifts to the left or right, turn the FORWARD spool stop adjusting screw IN (clockwise) on either the LEFT or RIGHT track main control valve to slow the fastest track down sufficiently to allow the machine to travel straight. Tighten locknut on adjusting screw.

AQ004-1B

MIN. DISPLACEMENT ADJUSTING SCREW 14. Repeat steps 1. through 12. to set RIGHT TRACK. 15. Raise machine with boom controls, Remove blocks and lower track onto ground.

4. Perform steps (2) & (3) depressing drive pedals in REVERSE and making adjustments to REVERSE spool stop adjusting screws.

FAST SPEED: 5. Turn ‘DRIVE’ switch to DRIVE. 6. Equally depress both drive pedals in 'FORWARD' position. Machine should travel straight.

7. If machine drifts to the left or right, verify that the MINIMUM DISPLACEMENT ADJUSTING SCREW (DIMENSION 'X') on both motors are correctly set.

A minor adjustment to DIMENSION 'X' to slow one of the motors down may be necessary in order for both motors to run at the same speed.

Turning the adjusting screw IN (clockwise) will reduce the motor speed. Tighten locknut on adjusting screw.

11.8

Tigercat 845 Feller Buncher

Track drive

BRAKE DESCRIPTION SERIAL NO. 8450101 & 8450102 Refer to circuit diagram; Oil pressure from line 'A' or 'B' enters the motor and passes through shuttle valve 'C' and enters brake release pressure reducing valve 'D'. Output pressure from the reducing valve is limited to 500 psi whenever 'A' or 'B' line pressure is above 500 psi., or 'A' or 'B' line pressure below 500 psi.

853-SM41

TRACK DRIVE MOTOR (S/N 8540101 & 8450102)

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.

11.9

Tigercat 845 Feller Buncher TRACK DRIVE HYDRAULICS DESCRIPTION

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 circuit diagram) opens and oil pressure builds up in the motor pistons.

SERIAL NO. 8450103 TO 8450475 The tracks on this machine are independently controlled by foot pedal proportional pilot valves which control the spools in the main control valve.

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 (G) to the main control valve and then to tank.

The main control valve operation is described in SECTION 4 OF THIS MANUAL. This independent track control provides the ability to counter-rotate the tracks for maneuverability.

The power is transmitted to the tracks from a variable displacement swash plate piston motor through a triple reduction planetary gearbox on each track frame.

The gearbox has integral spring apply, hydraulicrelease, multi-disc brake which is automatically released whenever the drive system is pressurized.

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, in the schematic diagram it is shown in the centre, closed position.

TRACK SPROCKET

PLANETARY TRACK DRIVE GEARBOX

The drive motor is a variable displacement swashplate design, Refer to Fig. 2. The motor is interchangeable from side to side. 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.

Supply oil from the drive control valve enters the 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

•

LOWER FRAME

• TRACK DRIVE MOTOR

•

•

••

BRAKE ASSEMBLY BK004-5

(FIG. 1) TRACK DRIVE MOTOR AND GEARBOX ASSEMBLY - SERIAL NO. 8450103 TO 8450475 11.10

Tigercat 845 Feller Buncher

Track drive

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 center 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 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.

NOTE: Swashplate angle (motor displacement) is limited by the minimum and maximum displacement pistons contacting the minimum and maximum displacement adjustment stops in the drive motor cover. For minimum displacement, the maximum displacement piston contacts the minimum displacement adjustment stop. For maximum displacement, the minimum displacement piston contacts the maximum displacement adjustment stop.

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 PISTON SLIPPER F

RETAINER G

I CYLINDER BLOCK PIN

BALL GUIDE H

J

MAXIMUM DISPLACEMENT PISTON L

K

SWASHPLATE E SEAL D SPACER C RETAINING RING B

••

•

••

••

•

• •

•

••

•

•

M SHIMS

•

•

•

•

N COVER

•

SHAFT A

•

• WEAR S SLEEVE

BEARING R SHELL PIN Q

SPRING P

O MINIMUM DISPLACEMENT PISTON

• COUNTERBALANCE VALVE

AP007-2

(Fig. 2) CROSS SECTION OF TRACK DRIVE MOTOR - SERIAL NO. 8450103 TO 8450475 11.11

Tigercat 845 Feller Buncher

Track drive oil to the crossover relief valve (B) and minimum displacement piston. The shuttle valve moves only when a drive function is actuated.

The drive motor cover (L), Refer to Fig. 3, 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 (B) protects the motor circuit from pressure spikes.

The shuttle valve (C) slides back and forth, depending on direction of travel, to route supply

COUNTERBALANCE VALVE G

DRIVE SPEED CHANGE VALVE

SUPPLY SHUTTLE VALVE F

DRIVE SPEED CHANGE ORIFICE K

DRIVE MOTOR COVER

H

L

MINIMUM DISPLACEMENT ADJUSTMENT STOP A 6mm ALLEN KEY 19mm WRENCH

CROSSOVER RELIEF VALVE B

• • • • • FLUSHING ORIFICE I

•

•

••

•

•

• C

MAXIMUM DISPLACEMENT E ADJUSTMENT STOP 6mm ALLEN KEY 19mm WRENCH AP007-1

•

SHUTTLE VALVE

J EDGE FILTER AND PRESSURE REDUCING VALVE ORIFICE

D DRIVE BRAKE RELEASE PRESSURE REDUCING VALVE

(FIG. 3) TRACK DRIVE MOTOR FRONT COVER - SERIAL NO. 8450103 TO 8450475 11.12

Tigercat 845 Feller Buncher

Track drive

BRAKE DESCRIPTION

the orifice. The orifice causes a pressure drop in supply oil flow to the reducing valve and dampens pressure oil fluctuation.

SERIAL NO. 8450103 TO 8450475 Refer to circuit diagram; 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 oil pressure to the lower oil pressure used to release the drive brake.

The higher supply oil pressure comes from the supply shuttle valve (F) when a drive function is actuated.

845-25

TRACK DRIVE MOTOR - S/N 8540103 TO 8450475

The drive speed change valve (H) routes supply oil to the maximum displacement piston to keep the drive motor in the lowest speed.

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. The edge filter is used to break up small particles in the oil so they flow through

COUNTERBALANCE VALVE

SUPPLY SHUTTLE VALVE

The drive speed change orifice (K) is located in the passage from the drive speed change valve to the maximum displacement piston. The orifice is accessible by removing the plug in the face of the cover. The orifice is used to dampen

DRIVE SPEED CHANGE VALVE

••

• •

6MM ALLEN KEY 19MM WRENCH

MINIMUM DISPLACEMENT ADJUSTMENT STOP 6MM ALLEN KEY 19MM WRENCH

•• MAXIMUM DISPLACEMENT ADJUSTMENT STOP

99-2

DRIVE SPEED CHANGE ORIFICE

CROSSOVER RELIEF VALVE

•• •

••

••

EDGE FILTER AND PRESSURE REDUCING VALVE ORIFICE

••

DRIVE BRAKE RELEASE PRESSURE REDUCING VALVE

(FIG. 4) TRACK DRIVE MOTOR (LINDE) - R.H. SIDE SHOWN - SERIAL NO. 8450103 TO 8450475 11.13

Tigercat 845 Feller Buncher

Track drive

pressure fluctuation.

The flushing orifice (long type) (I) 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.

DRIVE MOTOR START-UP PROCEDURE IMPORTANT: Drive motor will be damaged if not filled with oil before operating drive function. Procedure must be performed whenever a new drive motor is installed or whenever oil has been drained from the motor.

The drive motor may be operated in two ranges controlled by a solenoid valve which is operated by the “LOW/DRIVE” range switch in the console.

In the “LOW” mode the solenoid on the solenoid 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 traveling modes the switch can be put in the “DRIVE” mode and the motor will be in its minimum displacement position which will give the highest 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.

• A AQ007-3

(Fig. 5) DRIVE MOTOR

1. Disconnect drive motor drain line (A). Install plug in line to minimize loss of oil.

2. To let air escape, loosen the valve body for drive brake reducing valve on the left side or the plug for drive speed change valve on the right side one turn. Valves are next to the drain hose connection. Do not turn the lock nut or adjusting screw for the drive brake reducing valve.

3. Fill motor with oil through the drain port. Add oil until level is to the top of drain port.

4. Tighten valve body or plug.

5. Connect line.

6. Run each drive motor with track off the ground for three track revolutions to remove air from the drive circuit.

7. Check brake release pressure has not changed.

11.14

Tigercat 845 Feller Buncher

Track drive

DRIVE SYSTEM PRESSURE SETTINGS:

'E' - CROSSOVER RELIEF VALVE 'F' - CAP 'G' - SHIM (AS REQD).

'H' - SHIM (AS REQD).

SERIAL NO. 8450103 TO 8450475 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.

H

G

F

Approximate pressure change per shim:0.127 mm (0.005 in.) shim ........................ 100 psi E

0.508 mm (0.020 in.) shim ........................ 500 psi L.S. PRESSURE RELIEF VALVE ADJUSTING SCREW • 5MM ALLEN KEY • 17MM WRENCH

••

••

'P' GAUGE TEST CONN.

•

•• AQ007-4

••

HIGH PRESSURE LIMITING CONTROL

of less than 4600 psi is observed, the pressure can be adjusted by adding shims (G) and (H) in cap (F) of crossover relief valve (E).

'L.S.' GAUGE TEST CONN.

103-17A

(Fig. 7) DRIVE MOTOR

8. Repeat step 7 for the crossover relief valve on other drive motor.

(Fig. 6) MAIN CONTROL VALVE

9. After the crossover reliefs in both drive motors have been set, reset the Load Sense relief to 4300 psi. (4050 psi at L.S. test port). Refer to SET LOAD SENSE RELIEF VALVE in SECTION 4 of THIS MANUAL.

TEST PROCEDURE: NOTE: Ensure hydraulic oil is up to operating temperature.

Place felling head securely on ground before performing any service work.

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.

1. Temporarily reset Load Sense Relief Valve to 4600 psi measured at the main valve ‘P’ test port (4350 psi if measured at L.S. port). Refer to SET LOAD SENSE RELIEF VALVE in SECTION 4 of THIS MANUAL. 2. Remove final drive inspection cover(s).

3. Disconnect brake release line(s) at brake port on final drive gearbox(s) and plug hose with #4 JIC plug. Cap port adapter on gearbox.

4. Connect a 0-5000 PSI pressure gauge on ‘P’ test port of Linde main valve manifold.

5. Start engine and turn ‘DRIVE/LOW’ switch to ‘LOW’.

6. With engine above 1500 RPM, slowly depress DRIVE FOOT PEDAL for motor being tested to ensure brake holds.

7. With an assistant depressing the drive pedal, observe the pressure at the ‘P’ test port on the Linde main valve manifold. A reading of 4600 psi should be observed. If a pressure reading 11.15

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

Tigercat 845 Feller Buncher

Track drive

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.

845-14 (JULY 98)

(FIG. 8) TRACK DRIVE CIRCUIT - SERIAL NO. 8450103 TO 8450475 11.16

Tigercat 845 Feller Buncher

Track drive LEFT TRACK ADJUSTMENT

TRACK SPEED SET-UP PROCEDURE SERIAL NO. 8450103 TO 8450475

POSITION MACHINE:

IMPORTANT: • Ensure hydraulic oil is up to operating temperature.

2. Position felling head in vertical position and swing boom to LEFT side of machine.

3. Place felling head on ground and by forcing down with boom controls, lift track clear of ground. (Hoist down and stick out) (See Fig. 9).

• Changes in margin pressure will effect track speeds.

• The maximum displacement of the motors must be set correctly prior to this procedure.

Refer to DRIVE SPEED CHANGE VALVE in THIS SECTION.

4. Use blocks to firmly support track frame in raised position. DO NOT place arms, legs or body under track while in the raised position.

REMOVE INSPECTION COVERS 1. Remove both left and right final drive inspection covers to access track drive motors.

ANGLE TO BE BETWEEN 90° & 110°

(Fig. 9)

845-12

R.H. TRACK DRIVE

•

REVERSE SPOOL FORWARD SPOOL STOP SCREW FOR STOP SCREW FOR RIGHT TRACK LEFT TRACK

L.H. TRACK DRIVE

•

•

HIGH PRESSURE LIMITING CONTROL

CONTROL VALVE MANIFOLD

• •

•

• FORWARD SPOOL STOP SCREW FOR RIGHT TRACK 101-1

REVERSE SPOOL STOP SCREW FOR LEFT TRACK

• (FIG. 10) MAIN CONTROL VALVE 11.17

Tigercat 845 Feller Buncher

Track drive

LOW FORWARD (valve flow setting)

HIGH FORWARD (motor minimum displacement)

5. Turn ‘DRIVE/LOW’ switch to ‘LOW’

9. Turn ‘DRIVE/LOW’ switch to ‘DRIVE’

6. Set engine to full throttle.

10. Set engine to full throttle.

7. With an assistant depressing ‘LEFT’ TRACK drive pedal ‘FORWARD’, record track drive sprocket speed. A reading of 12 RPM is desired, (See Fig. 11).

11. With an assistant depressing ‘LEFT’ TRACK drive pedal ‘FORWARD’, record track drive sprocket speed. A reading of 24 RPM is desired, (See Fig. 11).

A TIMING MARK, VISIBLE FROM THE CAB CAN ALSO BE PLACED ON THE TRACK

NOTE: 24 RPM equals 1 complete revolution of the track every 9.5 seconds.

12. To obtain 24 RPM adjust the minimum displacement adjusting screw for the LEFT track drive motor. The minimum displacement adjusting screw (See Fig. 13) MINIMUM DISPLACEMENT ADJUSTMENT STOP 6mm ALLEN KEY 19mm WRENCH

ROTATION

TO RECORD TRACK SPEED, PLACE TIMING MARKS ON TRACK FRAME AND GEARBOX HOUSING

MAXIMUM DISPLACEMENT ADJUSTMENT STOP 6mm ALLEN KEY 19mm WRENCH

(FIG. 11) SET TRACK SPEED

84-18

NOTE: 12 RPM equals 1 complete revolution of the track every 19 seconds.

8. To obtain 12 RPM adjust FORWARD spool stop adjusting screw for the LEFT track drive control valve. (See Figs. 10 & 12).

SPOOL STOP ADJUSTING SCREW • 19MM WRENCH • 6MM ALLEN KEY

•

99-2

•• ••

(FIG. 13) MOTOR - R.H. SIDE SHOWN is the screw furthest from the brake 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.

HIGH REVERSE (valve flow setting) 13. Repeat steps 9 to 11 for ‘LEFT’ TRACK REVERSE. 14. To obtain 24 RPM adjust REVERSE spool stop adjusting screw for the LEFT track drive control valve. (See Figs. 10 & 12).

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.

853MV-2

(FIG. 12) VALVE FLOW SETTING TRACK DRIVE MAIN 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.

11.18

Tigercat 845 Feller Buncher

Track drive

RIGHT TRACK ADJUSTMENT

SET STRAIGHT TRAVEL

POSITION MACHINE

Following completion of TRACK SPEED SETUP PROCEDURE, try driving machine in both forward and reverse directions with the ‘DRIVE/LOW’ switch in both ‘DRIVE’ and ‘LOW’ positions.

15. Repeat steps 2 to 4 for ‘RIGHT’ TRACK LOW FORWARD (valve flow setting) 16. Repeat steps 5 to 8 for ‘RIGHT’ TRACK

If machine does not travel straight, the right and left track speeds are not set the same, therefore the above set-up procedures need to be rechecked.

HIGH FORWARD (motor minimum displacement) 17. Repeat steps 9 to 12 for ‘RIGHT’ TRACK HIGH REVERSE (valve flow setting)

NOTE: There are 4 speeds; Forward, reverse, drive and low. However, there are only 3 adjustments; Forward flow stop adjusting screw; Reverse flow stop adjusting screw and Motor minimum displacement adjustment stop.

18. Repeat steps 13 to 14 for ‘RIGHT’ TRACK REPLACE INSPECTION COVERS 19. Replace final drive inspection covers for both right and left track drives

SUMMERY OF PROCEDURE • REMOVE INSPECTION COVERS LEFT TRACK ADJUSTMENT • POSITION MACHINE • LOW FORWARD (valve flow setting) • HIGH FORWARD (motor minimum displacement) • HIGH REVERSE (valve flow setting) RIGHT TRACK ADJUSTMENT • POSITION MACHINE • LOW FORWARD (valve flow setting) • HIGH FORWARD (motor minimum displacement) • HIGH REVERSE (valve flow setting) • REPLACE INSPECTION COVERS

11.19

Tigercat 845 Feller Buncher

Track drive

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.

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

MEASURING TRACK SAG 1. Position felling head in vertical position and swing boom to side of machine.

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.

For a guide on inspection, refer to the PERIODIC MAINTENANCE SCHEDULE in SECTION 3 OF THIS MANUAL.

UNDERSIDE OF TRACK GUARD

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

OPERATING THE MACHINE

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.

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 sprocket and the track bushings. Bushings could crack during sprocket impact.

11.20

Tigercat 845 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 REMOVE

•

•

CW001-3

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.

• 1

2

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 11.21

Tigercat 845 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.

SINGLE GROUSER

Only bolts with grade '12.9' or '170' designation forged in the head are approved.

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 ............ 220LBF/FT. + 1/3 TURN. CHECKING TORQUE ....................... 450 LBF/FT.

TRIPLE GROUSER

BERC-1

BOTTOM ROLLER RETAINING BOLTS 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: 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.

GROUSER WEAR (HEIGHT)

WEAR LIMITS 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) NOTE: Allowable wear for soft ground conditions is 100%. Allowable wear for rocky ground conditions is 75%.

Bottom roller bolts ~ 3/4" UNC TORQUE .......................................... 310 LBF/FT. Bottom roller bolts ~ 7/8" UNC TORQUE .......................................... 475 LBF/FT. For a complete maintenance check Refer to the PREVENTIVE MAINTENANCE SCHEDULE in SECTION 3 of this manual.

BERC-2

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)

11.22

Tigercat 845 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

REVERSE SIDE WEAR

MEASURING BUSHING WEAR

To take this measurement,

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.

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

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%

180° EXTERNAL BUSHING WEAR

ROTATION

BOTTOM ROLLER WEAR

TURN PIN & BUSHING 180°

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.

Measure the roller diameter on the tread contact surface with a large calliper to obtain the worst wear condition.

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 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.

11.23

Tigercat 845 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) 845-32

TRACK SLIDE WEAR

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.

11.24

Tigercat 845 Feller Buncher

SECTION 12 - BOOM FUNCTIONS FEB. 99

CONTENTS - SECTION 12 ADJUST OIL FLOW TO CYLINDERS (CYLINDER CYCLE TIMES ....... 12.5 BOOM CONTROL VALVE ............................... 12.2. SEE ALSO SECTON 4 BOOM SYSTEM DESCRIPTION ........................................................... 12.2 CIRCUIT SCHEMATIC ........................................................................... 12.3 CYLINDER CYCLE TIMES, TYPICAL .................................................... 12.6 ENGINE ANTI-STALL ...................................... 12.2. SEE ALSO SECTON 4 LOAD SENSING ............................................ 12.2. SEE ALSO SECTION 9 SET MAIN BOOM, STICK AND TILT PORT RELIEF VALVES ............... 12.4 TILT CYLINDER (ROD END) FLOW ADJUSTMENT ............................. 12.7 TILT CYLINDER FLOW ADJUSTMENT ....................................... 12.2, 12.7

Tigercat 845 Feller Buncher

Boom functions

BOOM SYSTEM DESCRIPTION

LOAD SENSING\ENGINE ANTI-STALL

One cylinder is used to raise and lower the main boom.

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.

The stick boom and the tilt boom each use identical single cylinders.

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.

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).

For a full description of the engine anti-stall, Refer to SECTION 9 in THIS MANUAL. For a full description of the pilot system including the joystick handles, Refer to SECTION 5 in THIS MANUAL.

BOOM CONTROL VALVE 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.

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.

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.

This adjustment is to compensate for the weight 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.

For adjusting procedure refer to TILT CYLINDER (ROD END) FLOW ADJUSTMENT in THIS SECTION. 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.

12.2

Tigercat 845 Feller Buncher

845-30 (APRIL 98)

Boom functions

BOOM HYDRAULIC CIRCUIT 12.3

Tigercat 845 Feller Buncher

Boom functions

SET MAIN BOOM, STICK AND TILT PORT RELIEF VALVES

4.

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.

Turn port relief valve adjusting screws for functions being set fully IN (clockwise). Do not overtighten or breakage will result.

SPOOL TRAVEL STOP • 19mm WRENCH • 6mm ALLEN KEY

'P' GAUGE TEST CONN.

MAIN VALVE BODY

•

•

•• L.S. GAUGE TEST CONN.

PAB18

• •

PORT RELIEF VALVE

••

••

•

ADJUSTING SCREW • 5mm ALLEN KEY

LOCKNUT • 17mm WRENCH LINDE MAIN VALVE MANIFOLD

•

PILOT END CAP

MAIN VALVE PORT RELIEF VALVE

90744-3

MAIN VALVE MANIFOLD

5.

1.

With hydraulic oil at operating temperature,

2.

Connect a 0-5000 PSI pressure gauge on 'P' test port of Linde main valve manifold.

3.

Start engine and place throttle control in IDLE position. NOTE; It may be necessary to increase the engine RPM sufficiently to prevent the engine from stalling.

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.

Continued on page 5 FLOW ADJUSTING SCREW FOR PORT 'B' (TYPICAL)

MAIN BOOM 'UP' PORT RELIEF

TILT 'FORWARD' PORT RELIEF

•

HIGH PRESSURE LIMITING CONTROL

•

STICK 'OUT' PORT RELIEF CONTROL VALVE MANIFOLD

• •

•

A A

•

A A A

B

A

B B B B

B

• • • MAIN BOOM 'DOWN' PORT RELIEF 101-1X

FLOW ADJUSTING SCREW FOR PORT 'A' (TYPICAL)

TILT 'BACK' PORT RELIEF

•

MAIN CONTROL VALVE 12.4

STICK 'IN' PORT RELIEF

Tigercat 845 Feller Buncher

Boom functions

Continued from page 4

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.

WARNING

7.

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.

9.

16. Stop engine, remove all gauges and reinstall plugs and caps.

ADJUST OIL FLOW TO CYLINDERS (CYLINDER CYCLE TIMES) 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.

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.

8.

STICK AND TILT PORT RELIEFS 14. Repeat steps 5 thru' 12 to set the port relief valves for the STICK 'IN' and 'OUT' and the TILT 'FORWARD' and 'BACK' functions.

15. Readjust L.S. pressure relief valve on Linde main valve manifold to read 4300 PSI on pressure gauge at 'P' port (4050 psi at 'LS' port). Refer to SET LOAD SENSE RELIEF VALVE in SECTION 4 of THIS MANUAL.

When adjusting the port relief valves, the boom will fall if the relief adjusting screw is unscrewed (counterclockwise) out too far.

6.

13. Check the setting again by ensuring that the hissing noise is still absent after tightening the locknut.

Tighten locknut on adjusting screw taking care NOT to turn the adjusting screw at the same time.

Check the setting again by ensuring that the hissing noise is still absent after tightening the locknut.

10. 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.

11. 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.

12. Tighten locknut on adjusting screw taking care NOT to turn the adjusting screw at the same time.

12.5

1.

Hydraulic oil must be at operating temperature.

2.

Start engine and place engine throttle control in FULL position.

3.

MAIN BOOM CYLINDER; Fully retract cylinder.

4.

Place MAIN BOOM joystick lever in 'FULL UP' position and fully ** extend cylinder. Record cycle time from stop to stop.

5.

Place MAIN BOOM joystick lever in 'FULL DOWN' position and fully ** retract cylinder.

Record cycle time from stop to stop.

6.

STICK BOOM CYLINDER; Repeat steps (4) and (5) using STICK BOOM joystick lever.

7.

TILT CYLINDER; Before the TILT cylinder cycle times can be recorded, the rod end flow control adjusting screw must first be set correctly.

See TILT CYLINDER (ROD END)FLOW ADJUSTMENT in THIS SECTION. Repeat steps (4)** and (5)** using TILT joystick lever. ** When extending or retracting the cylinders to record the time, it is better to 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.

Tigercat 845 Feller Buncher

Boom functions

TYPICAL CYLINDER CYCLE TIMES

NOTE: The 'A' ports (top ports) are connected to the base end of the cylinders and the 'B' ports (bottom ports) are connected to the rod end of the cylinders.

The following chart lists typical cylinder cycle times and is based on recommended factory settings. It should be noted that over adjusting to provide faster cycle times could increase the stress on boom components and the hydraulic system.

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 below.

CYLINDER CYCLE TIMES CYLINDER

CYL.

MAIN BOOM - 'UP' ............. 5.5 SEC. MAIN BOOM - 'DOWN' ....... 6.0 SEC. STICK BOOM - 'IN' ............. 4.8 SEC. STICK BOOM - 'OUT' ......... 4.6 SEC. TILT - 'FORWARD' .............. 5.6 SEC. TILT - 'BACK' ...................... 5.0 SEC.

CYCLE TIMES FULL EXTN. FULL RET. FULL RET. FULL EXTN. FULL EXTN. FULL RET.

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.

MAIN BOOM 'DOWN' FLOW ADJUSTING SCREW

TILT 'BACK' FLOW ADJUSTING SCREW STICK 'IN' FLOW ADJUSTING SCREW

TILT 'FORWARD' PORT CONNECTION

MAIN BOOM 'UP' PORT CONNECTION

STICK 'OUT' PORT CONNECTION

•

A

•A

A

•

••A

A

A

B

••

•

B

MAIN BOOM 'DOWN' PORT CONNECTION MAIN BOOM 'UP' FLOW ADJUSTING SCREW

101-1X

CONTROL VALVE MANIFOLD

••

•

B B

••

B B

• TILT 'BACK' PORT CONNECTION TILT 'FORWARD' FLOW ADJUSTING SCREW

•

• STICK 'IN' PORT RELIEF

•

STICK 'OUT' FLOW ADJUSTING SCREW

MAIN CONTROL VALVE FLOW ADJUSTING SCREWS 12.6

Tigercat 845 Feller Buncher

Boom functions

TILT CYLINDER (ROD END) FLOW AND SPEED ADJUSTMENT

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.

This adjusting screw restricts the flow of oil leaving the rod end of the TILT cylinder when tilting FORWARD.

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.

UNDERSIDE OF LINDE MAIN VALVE MANIFOLD

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.

•• TILT CYLINDER RESTRICTION ADJUSTMENT SCREW

•• TILT CYL. FLOW ADJUSTING SCREW

120-15A

When correctly set, this restriction will prevent cylinder damage.

1.

With hydraulic oil at operating temperature.

2.

Connect a 0-5,000 psi pressure gauge on 'P' test port of Linde main valve manifold.

LINDE MAIN VALVE MANIFOLD

••

'P' GAUGE TEST CONN.

• •• L.S. GAUGE TEST CONN.

PAB18

MAIN VALVE MANIFOLD

3.

Start engine and place throttle control in FULL.

4.

Raise boom and place felling head in fully TILT BACK position (cylinder fully retracted).

5.

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.

12.7

6.

Tighten locknut on restriction adjustment screw taking care NOT to turn the adjusting screw at the same time.

7.

Check the pressures again after tightening the locknut.

8.

Stop engine and remove gauge.

Tigercat 845 Feller Buncher

Boom functions

12.8

Tigercat 845 Feller Buncher

SECTION 15 - SWING FEB. 99

CONTENTS - SECTION 15 ADJUST OIL FLOW TO SWING MOTOR(SWING MOTOR SPEED) .............. 15.4 CIRCUIT SCHEMATIC .................................................................................... 15.5 LUBRICATE GEARBOX LOWER BEARINGS ................................................. 15.3 SET SWING MOTOR SPEED ......................................................................... 15.4 SWING DRIVE SWING HYDRAULICS ................................................................................. 15.2 SET CROSSLINE RELIEF VALVES ......................................................... 15.3 SWING MOTOR REMOVAL FROM GEARBOX .............................................. 15.6

Tigercat 845 Feller Buncher

Swing gearbox at approx. 1 GPM. The oil exits the gearbox via port 'T' and is returned to the hydraulic tank. This flow of 'return oil' through the gearbox is caused by back pressure created by the oil cooler in one of the other return to tank lines on the wrist and clamps valve.

MOTOR

CROSSLINE RELIEF VALVES R.H ROTATION

• •

BRAKE RELEASE PORT 'Y'

L.H. ROTATION

••

STEEL DISC

FLUSHING PORT 'T'

FLUSHING PORT 'U'

FRICTION DISC

••

SWING BRAKE

•

•

•

• GEARBOX

• BRAKE RELEASE PORT 'Z'

•• BK005-3

••

CROSS SECTION OF SWING BRAKE

FROM BRAKE RELEASE PILOT

111-6

•

SWING DRIVE GEARBOX

ORIFICE SWING BRAKE GEARBOX FLUSHING OIL SUPPLY FROM OIL COOLER INLET

SWING DRIVE SWING HYDRAULICS The swing function is controlled by the left joystick valve which sends proportional pilot signals to the main valve which supplies oil to the swing motor.

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.

CROSS LINE RELIEF VALVES

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 and is held in the OFF position by hydraulic pressure supplied by the swing brake solenoid valve when the switch in the console is in the OFF position. In the event that electrical power is lost to the solenoid valve or hydraulic pressure to the pilot valve is lost, the swing brake will engage automatically.

PRESSURE LINES FROM MAIN CONTROL VALVE 845-16

The swing gearbox is lubricated by hydraulic oil which flows from one of three return ports on the clamp and wrist valve into the 'U' port on the swing drive gearbox. A 1/16 inch orifice installed in this port regulates the flow of oil through the 15.2

SWING DRIVE MOTOR SCHEMATIC

Tigercat 845 Feller Buncher

Swing

A grease fitting and a relief fitting have been introduced on later machines to facilitate lubrication of the gearbox lower bearings. The

SET CROSSLINE RELIEF VALVES 1.

Install a 0-5000 psi pressure gauge in the 'L.S.' test port on the back of the main valve manifold.

SWING DRIVE GEARBOX

HIGH PRESSURE LIMITING CONTROL

LUBE FITTING

RELIEF FITTING

• ••

'P' GAUGE TEST CONN.

LINDE MAIN VALVE MANIFOLD

•

•

••

••

••

L.S. GAUGE TEST CONN.

MAIN VALVE MANIFOLD

PAB-18

216-5A

2.

Start engine and place throttle control in FULL.

3.

Ensure that hydraulic oil is at operating temperature.

4.

Turn anti-stall switch OFF and the swing brake ON.

5.

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.

LUBRICATE GEARBOX LOWER BEARINGS cavity in which the bearings are housed is completely filled with grease. Remove the cover plate directly below the gearbox to gain access to the lube fittings. For lubricating instructions refer to the LUBRICATION SCHEDULE in SECTION 3 of THIS MANUAL

If pressure gauge is installed in 'P' test port, reading on gauge would be 3300 psi.

CROSSLINE RELIEF VALVES R.H. ROTATION

•• ADJUSTING SCREWS 111-6

15.3

•••

L.H. ROTATION

• •• • CROSSLINE RELIEF

6.

Retighten locknut on each adjusting screw taking care not to disturb adjusting screw and recheck pressure setting before removing pressure gauge.

7.

Stop engine, remove gauge and reinstall plug.

Tigercat 845 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.

1.

Hydraulic oil must be at operating temperature.

2.

Start engine and place engine throttle control in FULL position.

3.

4.

•

PILOT END CAP

•

MAKE UP VALVE

•

MAIN VALVE BODY

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

5.

Repeat step (3) with L.H. joystick lever in 'FULL RIGHT' position.

MAIN VALVE SPOOL TRAVEL STOP 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.

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 A

B

A

B B B B

B

•

101-1

FLOW ADJUSTING SCREW FOR SWING RIGHT

• MAIN CONTROL VALVE

15.4

Tigercat 845 Feller Buncher

Swing

SWING DRIVE CIRCUIT 845-29 (APRIL 98)

15.5

Tigercat 845 Feller Buncher

SWING BRAKE ASSY.

•

BRAKE DISCS

•

•• • •

• •

SUN GEAR (EARLIER STYLE SHOWN)

• •

GEARBOX

M12 HEX. HD. RETAINING BOLTS TORQUE TO 62LBF/FT

•

FIRST STAGE PLANETARY BK005-3 GEARS (QTY. 3)

•

•

SPACER PT. NO. 92084 OUTER SPLINES FOR BRAKE DISCS

CROSS SECTION OF SWING BRAKE

•

•

BOTTOM GEAR TEETH

SWING PINION

• BK010-2

SPACER

BRAKE HOUSING

SWING DRIVE MOTOR M16 HEX. HD. RETAINING BOLTS TORQUE TO 150 LBF/FT (205 NM)

Swing

BK005-4

SWING DRIVE ASSEMBLY

•

EARLIER STYLE SUN GEAR

DISASSEMBLY AND ASSEMBLY OF SWING MOTOR FROM GEARBOX

LATER STYLE SUN GEAR

PROCEDURE: The following procedure should be used.

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.

1.

Remove the swing drive motor from the swing drive gearbox.

SPACER SUN GEAR

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.

ALIGNMENT MARKS

Installing a spacer ring between the sun gear and the swing motor will ensure that the motor cannot be installed unless the sun gear has been properly inserted.

AQ009-2

2.

NOTE: Earlier style sun gears will require the use of the spacer part no. 92084. If the spacer was not included originally, then one should be added when reassembling the gearbox.

••

BRAKE HOUSING WITH MOTOR REMOVED

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.

Later style sun gears incorporate a raised shoulder at the top, which takes the place of the spacer, therefore the spacer is not required.

3.

15.6

Remove the sun gear from the swing drive

Tigercat 845 Feller Buncher

Swing

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).

'O' RING

MOTOR

MOTOR MOUNTING SURFACE

SPACER SUN GEAR

• •

• •

15/16" ± 1/16"

•

1-5/16" ± 1/16"

'O' RING

•

BK005-5

6.

VERIFY SUN GEAR IS FULLY INSTALLED

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 from the swing motor mounting surface to either the top of sun gear (15/16” ± 1/16”) or to the next flat surface on the sun gear (1 5/16” ± 1/16”).

15.7

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).

Tigercat 845 Feller Buncher

Swing

15.8

Tigercat 845 Feller Buncher

SECTION 17 - SAW DRIVE FEB. 99

CONTENTS - SECTION 17 FELLING HEAD, 20" SAW. SEE ORIGINAL MANUFACTURERS MANUAL PRESSURE SETTINGS Serial No. 8450101 to 8450230 ................................................. 17.7 Serial No. 8450231 to 8450249 ................................................. 17.9 Serial No. 8450261 to 8450475 ................................................. 17.15 SAW CIRCUIT DESCRIPTION Serial No. 8450101 to 8450249 ................................................. 17.6 Serial No. 8450261 to 8450475 ................................................. 17.14 SAW CIRCUIT SCHEMATIC Serial No. 8450101 to 8450249 ................................................. 17.11 Serial No. 8450261 to 8450475 ................................................. 17.17 SAW CONTROL VALVES Main saw valve ......................................................................... 17.5 Pilot valve ................................................................................. 17.4 SAW PUMP Serial No. 8450101 to 8450230 ................................................. 17.2 Serial No. 8450231 to 8450249 ................................................. 17.3 Serial No. 8450261 to 8450475 ................................................. 17.12

Tigercat 845 Feller Buncher

Saw drive

SAW PUMP

WRIST AND CLAMPS SECTION (FIXED)

SAW SECTION (VARIABLE)

Serial No. 8450101 to 8450249* * NOTE: Some machines in this Serial No. range may have been updated to include a later design pump as shown on page 17.12.

•

•

PRESSURE COMPENSATOR

•

In this case when setting pressures refer to set up procedure for machine serial number 8450261 TO 8450475, described later in this section.

The saw pump is a "double pump" mounted and driven off the end of the main pump attached to the bell housing of the engine.

853-45

SAW AND CLAMPS PUMP SCHEMATIC (for fig. AP028-2)

MAIN PUMP CONTROL VALVE

MAIN PUMP (LINDE)

WRIST AND CLAMPS PUMP

SAW PUMP

• •

•

•

100-1-1

••

SAW PUMP PRESSURE COMPENSATOR (SMALLER COMPENSATOR SHOWN)

PUMP ASSEMBLY (Serial No. 8450101 to 8450249)

• WRIST AND CLAMPS SECTION (FIXED VANE TYPE)

• •

• DRIVE SHAFT

PIN TO BE REMOVED FROM ORIGINAL EQUIPMENT T

•

HOUSING

P

•

SAW SECTION (VARIABLE DISPLACEMENT PISTON TYPE)

PRESSURE COMPENSATOR

SAW AND CLAMPS PUMP CROSS SECTION (EARLIER "DENISON" DESIGN WITH LARGER PRESSURE COMPENSATOR VALVE) AP012-1

P.O.R. VALVE 3600 PSI

(Serial No. 8450101 to 8450230) 17.2

•

•

• AP012-5

NOT USED

PRESSURE COMPENSATOR

Tigercat 845 Feller Buncher

Saw drive

WRIST AND CLAMPS PUMP SECTION (FIXED VANE TYPE)

• •

• DRIVE SHAFT

• P.O.R. VALVE ADJUSTING SCREW 3600 PSI

•

HOUSING SAW PUMP SECTION (VARIABLE DISPLACEMENT PISTON TYPE)

T

PRESSURE COMPENSATOR

•

•

SAW AND CLAMPS PUMP CROSS SECTION ( LATER "DENISON" DESIGN WITH SMALLER COMPENSATOR VALVE) AND REPLACEMENT FOR PUMP SHOWN IN FIG. AP012-1 AP028-2

AP028-3

PRESSURE COMPENSATOR

(Serial No. 8450231 to 8450249)

The double pump consists of a fixed displacement pump section and a variable displacement pump section. The saw drive uses the variable displacement portion and the wrist and clamps functions use the fixed displacement section.

17.3

P

Tigercat 845 Feller Buncher

Saw drive

SAW CONTROL VALVES

OPERATING DESCRIPTION

Serial No. 8450101 TO 8450475

Pilot valve

The saw circuit is controlled by a solenoid operated pilot valve and a pilot operated main control 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.

The pilot valve consists of a steel body into which is housed a solenoid operated control valve cartridge.

SAW PILOT VALVE

The main saw valve is part of the clamps and wrist 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 and clamp functions.

Each spool section is pilot operated.

SOLENOID

••

An outlet section directs return oil back to tank via the oil cooler.

For wrist and clamps valve description SEE SECTION 18 of this manual.

VALVE BODY

DIN CONNECTOR

•

SAW, WRIST AND CLAMPS VALVE

•

•

100-F

•

•

CONTROL VALVE CARTRIDGE AT022

SOLENOID

SAW PILOT VALVE

17.4

SAW PILOT VALVE

Tigercat 845 Feller Buncher

Saw drive to one end of the spool from the pilot valve. Shifting the spool directs oil from the saw pump to the saw motor.

OPERATING DESCRIPTION Main saw valve 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. It returns to tank via the oil cooler.

The relief valve installed in the saw inlet section of the main saw valve is to protect the pump in the event of a pump regulator failure or seizing of the pump swashplate.

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 3position 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 OUTLET SECTION POWER BEYOND PORT (TO SWING BRAKE)

••

••

ACCUM.

CLAMPS

INLET (MID) SECTION

WRIST

•

••

MAIN (MID) RELIEF VALVE

• SAW

•

••

SAW SECTION

•

GAUGE TEST PORT (FOR SAW)

•

SAW RELIEF (4000psi) - 1 " WRENCH - 11/16" WRENCH - SLOT SCREW DRIVER SAW END INLET SECTION

104-9

SAW CONTROL VALVE (WITH WRIST AND CLAMPS) 17.5

GAUGE TEST PORT (FOR WRIST & CLAMPS)

Tigercat 845 Feller Buncher

Saw drive PARALLEL PASSAGE

A

PLUG

LOAD CHECK VALVE

WORK PORT BRIDGE

B

•

• • •

•

• PILOT END CAP 90136-4G

•

•

•

ANTI CAVITATION VALVE

•

• •

SPOOL CENTERING SPRING

PILOT END CAP SPOOL

TANK PASSAGE

THRU' NEUTRAL PASSAGE

CROSS SECTION OF SAW SPOOL SECTION

SAW CIRCUIT DESCRIPTION Serial No. 8450101 to 8450249 The saw blade (typically on Koehring Waterous heads) is driven by a variable displacement hydraulic motor (axial piston, bent axis) which is mounted directly above the saw blade and coupled to the saw blade through a drive shaft.

A variable displacement hydraulic pump mounted behind the main pump supplies oil flow to the motor via the saw control valve. The main saw control valve is pilot operated and controls the flow of hydraulic oil from the pump to the motor. A relief valve is installed in the inlet section of the main saw control valve.

A solenoid operated 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. It is a 2 position switch controlling the flow of electrical current via a relay to the saw pilot valve solenoid.

An electrical signal from the saw switch 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 control valve.

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.

With the saw switch in the OFF position, the solenoid operated pilot valve is in the de-energized position preventing pilot oil flow from shifting the spool in the main saw control valve.

With the main saw control valve spool in this neutral position, the hydraulic oil is directed through the open centre of the main control valve and back to tank. This prevents the saw pump from generating system pressure to rotate the blade, it also causes the saw pump to shift to maximum displacement.

When the saw switch is placed in the ON position, the solenoid operated pilot valve will be placed in the energized position directing pilot oil to shift the spool in the main saw control valve. This will direct oil from the saw pump to the saw motor, causing the system pressure to rise and the saw blade to begin to rotate .

When the pressure (system pressure) builds up to 3600 psi the spool in the pump COMPENSATOR valve shifts to direct oil to the pump swashplate control piston. The piston moves the swashplate towards the neutral position to cut back the flow of oil while at the same time maintaining the pressure and continuing to rotate the blade.

This system has a lower horsepower requirement and generates less heat since the pump reduces its 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 for variable displacement motors.

Return oil from the saw motor is directed through the outlet section of the wrist and clamps valve, through the oil cooler and back to tank.

For explanation of saw motor, refer to saw head IMPORTANT: To maximize motor life, do not shut manufacturers manual. the engine off until the saw blade has come to a complete stop.

17.6

Tigercat 845 Feller Buncher

Saw drive 5.

For earlier installations with larger compensator valve on pump;

On pump P.O.R. valve(compensator); Remove acorn nut, slacken jamnut and screw the P.O.R. valve adjusting screw on the saw pump all the way in. CAUTION: Do not use excessive force, Stop when resistance increases sharply.

6.

* NOTE: Some machines in this Serial No. range may have been updated to include a later design pump as shown on page 17.12.

On saw control valve; slacken jamnut and turn adjusting nut on saw control relief valve out until spring pressure is relieved.

7.

Start the engine¯ and put throttle control to the IDLE position.

PRESSURE SETTINGS: PUMP AND SAW CONTROL VALVE Serial No. 8450101 to 8450230*

In this case when setting pressures refer to set up procedure for machine serial number 8450261 TO 8450475, described later in this section.

1.

Park machine on level ground, stop engine.

2.

Block saw blade from rotating as per method outlined in saw head manufacturer’s manual.

3.

Ensure the hydraulic oil temperature is at operating temperature.

4.

Install a 0-5000 psi pressure gauge on saw valve gauge test port.

¯CAUTION: Before starting engine, ensure relief valve is unscrewed as stated in paragraph 5 otherwise damage could occur to the piston pump.

8.

Reset pilot system and turn the saw switch ON. 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. 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.

9.

SAW RELIEF (4000psi) - 1 " WRENCH

IMPORTANT: Saw relief valve must be set at least 400 PSI above pump P.O.R. to avoid generation of excessive heat.

GAUGE TEST PORT (FOR SAW)

• 104-9

•

SAW CONTROL VALVE

10.

Re-tighten jamnut making sure adjusting nut does not turn.

11.

Set P.O.R. on pump compensator to 3600 p.s.i.

SAW PUMP

••

P.O.R. VALVE 3600 PSI

PIN TO BE REMOVED FROM ORIGINAL EQUIPMENT T

P

•

• AP012-5

NOT USED

PRESSURE COMPENSATOR SAW PUMP (EARLIER DESIGN WITH LARGER PRESSURE COMPENSATOR VALVE) 100-1

(Serial No. 8450101 to 8450230

17.7

Tigercat 845 Feller Buncher

Saw drive

(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.

12.

Re-tighten jamnut, making sure adjusting screw does not turn.

13.

Remove pressure gauge. *Refer to RELIEF VALVE ADJUSTING PROCEDURE in SECTION 18 of this manual.

SET MOTOR P.O.R. (BEGIN OF STROKE) SET MOTOR MINIMUM DISPLACEMENT Refer to FELLING HEAD MANUFACTURERES MANUAL for this information.

17.8

Tigercat 845 Feller Buncher

Saw drive 5.

On pump COMPENSATOR valve; Slacken jamnut and screw the adjusting screw all the way in. CAUTION: Do not use excessive force, Stop when resistance increases sharply.

* NOTE: Some machines in this Serial No. range may have been updated to include a later design pump as shown on page 17.12.

6.

On saw control valve; slacken jamnut and turn adjusting screw on saw control relief valve out until spring pressure is relieved.

In this case when setting pressures refer to set up procedure for machine serial number 8450261 TO 8450475, described later in this section.

7.

Start the engine¯ and put throttle control to the IDLE position.

PRESSURE SETTINGS: PUMP AND SAW CONTROL VALVE Serial No. 8450231 to 8450249*

1.

Park machine on level ground, stop engine.

2.

Block saw blade from rotating as per method outlined in saw head manufacturer’s manual.

3.

Ensure the hydraulic oil temperature is at operating temperature.

4..

¯CAUTION: Before starting engine, ensure relief valve is unscrewed as stated in paragraph 5 otherwise damage could occur to the piston pump.

8.

Reset pilot system and turn the saw switch ON. 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. 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.

Install a 0-5000 psi pressure gauge on saw valve test port.

9.

IMPORTANT: Saw relief valve must be set at least 400 PSI above pump P.O.R. to avoid generation of excessive heat.

GAUGE TEST PORT (FOR SAW)

•• ••

104-9

10.

Re-tighten jamnut making sure adjusting nut does not turn.

SAW RELIEF (4000psi) - 1 " WRENCH

SAW CONTROL VALVE SAW PUMP P.O.R. VALVE ADJUSTING SCREW 3600 PSI

••

T

P

• AP028-3

PRESSURE COMPENSATOR

100-1-1

SAW PUMP (WITH SMALLER PRESSURE COMPENSATOR VALVE) (Serial No. 8450231 to 8450249)

17.9

Tigercat 845 Feller Buncher

Saw drive

11.

Set P.O.R. on pump compensator to 3600 p.s.i. (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.

12.

Re-tighten jamnut, making sure adjusting screw does not turn.

13.

Remove pressure gauge. *Refer to RELIEF VALVE ADJUSTING PROCEDURE in SECTION 18 of this manual.

SET MOTOR P.O.R. (BEGIN OF STROKE) SET MOTOR MINIMUM DISPLACEMENT Refer to FELLING HEAD MANUFACTURERS MANUAL for this information.

17.10

Tigercat 845 Feller Buncher

Saw drive

SAW CIRCUIT 845-22 (APR. 98)

(Serial No. 8450101 to 8450249)

17.11

Tigercat 845 Feller Buncher

Saw drive A separate fixed displacement pump is mounted on the back of the saw pump for the wrist and clamps functions.

SAW PUMP Serial No. 8450261 TO 8450475 SERIAL NUMBER NOTE; When machines with serial number 8450101 to 8450249 are updated with the pump described here, follow the PRESSURE SETTING procedure for machine serial nos. 8450261 TO 8450475 described later in this section.

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.

SAW PUMP SCHEMATIC

The pump is mounted and driven off the end of the main pump attached to the bell housing of the engine.

(Serial No. 8450261 TO 8450475)

853SM48

SAW PUMP (LINDE)

•

SAW PUMP PRESSURE COMPENSATOR

•

•

WRIST AND CLAMPS PUMP (DENISON)

• MAIN PUMP (LINDE)

PUMP ASSEMBLY 217-3

(Serial No. 8450261 TO 8450475)

17.12

Tigercat 845 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

(Serial No. 8450261 TO 8450475)

17.13

Tigercat 845 Feller Buncher

Saw drive LOAD CHECK VALVE

PARALLEL PASSAGE

A

PLUG

WORK PORT BRIDGE

B

•

• • •

•

PILOT END CAP 90136-4G

•

•

•

•

ANTI CAVITATION VALVE

•

• •

SPOOL CENTERING SPRING

PILOT END CAP SPOOL

TANK PASSAGE

THRU' NEUTRAL PASSAGE

CROSS SECTION OF SAW SPOOL SECTION

SAW CIRCUIT DESCRIPTION

come to a complete stop.

Serial No. 8450261 TO 8450475

With the saw switch in the OFF position, the solenoid operated pilot valve is in the de-energized position preventing pilot oil flow from shifting the spool in the main saw control valve.

The saw blade (typically on Koehring Waterous heads) is driven by a variable displacement hydraulic motor (axial piston, bent axis) which is mounted directly above the saw blade and coupled to the saw blade through a drive shaft.

The variable displacement saw pump supplies oil flow to the motor via the saw control valve. The main saw control valve is pilot operated and controls the flow of hydraulic oil from the pump to the motor. A relief valve is installed in the inlet section of the main saw control valve.

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

The saw switch located on the control panel in the cab is used to turn the saw ON or OFF. It is a 2 position switch controlling the flow of electrical current via a relay to the saw pilot valve solenoid.

An electrical signal from the saw switch 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 control valve.

When the saw switch is placed in the ON position, the solenoid operated pilot valve will be placed in the energized position directing pilot oil to shift the spool in main saw control valve. This will direct oil from the saw pump to the saw motor, causing the system pressure to rise and the saw blade to begin to rotate.

When the pressure (system pressure) builds up to 3600 psi the spool in the pump COMPENSATOR valve shifts to direct oil to the pump swashplate control piston. The piston moves the swashplate towards the neutral position to cut back the flow of oil while at the same time maintaining the pressure and continuing to rotate the blade.

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.

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

With the main saw control valve spool in this neutral position, the hydraulic oil is directed through the open centre of the main control valve and back to tank. This prevents the saw pump from generating system pressure to rotate the blade, it also causes the saw pump to shift to maximum displacement.

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, through the oil cooler and back to tank.

For explanation of saw motor, refer to saw head manufacturers manual.

17.14

Tigercat 845 Feller Buncher

Saw drive

PRESSURE SETTINGS: PUMP AND SAW CONTROL VALVE Serial No. 8450261TO 8450475 1. Park machine on level ground and stop engine.

2. Block saw blade from rotating as per method outlined in saw head manufacturer’s manual.

3. Ensure the hydraulic oil temperature is at operating temperature.

GAUGE TEST PORT (FOR SAW)

SAW RELIEF (4000 PSI)

4. Install a 0-5000 PSI pressure gauge on saw valve gauge test port.

- 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.

• The STANDBY valve adjusting screw is screwed fully IN (factory set) and must remain this way. This portion of the compensator is NOT USED.

• •• SAW CONTROL VALVE

104-9

P.O.R. VALVE (3600 PSI)

6. On saw control valve, slacken the jamnut and turn adjusting nut on saw control relief valve OUT until spring pressure is relieved.

STANDBY VALVE

•• • 217-21

PRESSURE COMPENSATOR VALVE PRESSURE COMPENSATOR VALVE

•

SAW PUMP (LINDE)

WRIST AND CLAMPS PUMP (DENISON)

• •

SAW PUMP WITH PRESSURE COMPENSATOR 217-5

(Serial No. 8450261 TO 8450475)

17.15

Tigercat 845 Feller Buncher

Saw drive

7. Start the engine** and put throttle control to the IDLE position.

SET MOTOR BEGIN OF STROKE TO 3200 PSI Refer to felling attachment manufacturer’s service literature for this procedure.

**CAUTION: Before starting engine, ensure relief valve is unscrewed as stated in step 5, otherwise damage could occur to the piston pump.

IMPORTANT: The motor begin of stroke setting must be at least 400 PSI lower than the pump P.O.R. setting.

8. Reset pilot system and turn the saw switch ON. NOTE: Saw will not operate with pilot system OFF. Saw will not function properly with low pilot pressure.

SET MOTOR MINIMUM DISPLACEMENT Refer to felling attachment manufacturer’s service literature for this information.

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. 9. 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.

IMPORTANT: Saw relief valve must be set at least 400 PSI above pump P.O.R. to avoid generation of excessive heat.

10. Re-tighten jamnut, making sure adjusting nut does not turn.

11.

Set P.O.R. on pump compensator to 3600 p.s.i. (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.

12. Re-tighten jamnut, making sure adjusting screw does not turn.

13. The adjusting screw on the STANDBY valve must remain screwed fully IN. 14. Remove all pressure gauges. ***Refer to RELIEF VALVE ADJUSTING PROCEDURE in section 18 of this manual.

17.16

Tigercat 845 Feller Buncher

Saw drive

SAW CIRCUIT 845-27 (APR. 98)

(Serial No. 8450261 TO 8450475) 17.17

Tigercat 845 Feller Buncher

Saw drive

17.18

Tigercat 845 Feller Buncher

SECTION 18 - TREE CLAMPS AND WRIST FEB. 99

CONTENTS - SECTION 18 CIRCUIT DESCRIPTION ................................................ 18.6 PRESSURE SETTINGS .............................................. 18.6 CIRCUIT SCHEMATIC SERIAL NO. 8450101 TO 8450249 .............................. 18.8 SERIAL NO. 8450261 TO 8450475 .............................. 18.9 CONTROL VALVE ........................................................... 18.2 RELIEF VALVE, MAIN AND PORT .................................. 18.4 RELIEF VALVE ADJUSTING PROCEDURE ................ 18.5

Tigercat 845 Feller Buncher

Tree clamps and wrist through the three spool sections and back to tank via the outlet section. Each of the spool sections has a self centering 3-position 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 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).

TREE CLAMP, ACCUMULATING ARMS AND WRIST CONTROL 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 clamp, accumulating arms and the wrist functions.

Each spool is pilot operated. The outlet section is common to all four sections and returns oil to the hydraulic tank through the oil cooler.

NOTE: Re. Clamps: 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.

Oil enters the inlet section and is allowed to pass

OUTLET SECTION POWER BEYOND PORT (TO SWING MOTOR FOR GEARBOX FLUSHING)

•

•

•• •

ACCUM.

•• PORT RELIEF VALVES

PORT RELIEF VALVES

CLAMPS

•

• INLET (MID) SECTION

WRIST

•

••

•

MAIN RELIEF VALVE

•• GAUGE TEST PORT

•• SAW SECTION

104-9

•

WRIST AND CLAMPS CONTROL VALVE (WITH SAW SECTION) 18.2

Tigercat 845 Feller Buncher

Tree clamps and wrist

To prevent over pressurizing of the operating circuits, each work port in the valve sections has a PORT RELIEF VALVE.

higher than the pump compensator pressure setting and will limit the pressure should a pump regulator or "swashing" failure occur.

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.

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 of the manual.

A main relief valve is also installed in the inlet section of the saw section. This relief valve is set

OUTLET SECTION

•

•

PORT RELIEF VALVES

OPEN

B

A

CLOSE

•

•

CLOSE

A

B

OPEN

•

•

LEFT

A

B

RIGHT

•

MID INLET SECTION

MAIN RELIEF VALVE

•

•

PORT RELIEF VALVES

•

•

SAW SECTION

WRIST AND CLAMPS CONTROL VALVE (WITH SAW SECTION)

845-19 RELIEF VALVE PORT 'A'

PARALLEL PASSAGE

LOAD CHECK VALVE

A

WORK PORT BRIDGE

RELIEF VALVE PORT 'B'

B

PILOT END CAP PILOT END CAP 90136-3

SPOOL CENTERING SPRING

SPOOL TANK PASSAGE

THRU' NEUTRAL PASSAGE

CROSS SECTION OF SPOOL SECTIONS 18.3

Tigercat 845 Feller Buncher

Tree clamps and wrist ANTI-CAVITATION RELIEF VALVE LATER DESIGN

VALVE POPPET

This valve is used as a MAIN and PORT relief valve in both the wrist, clamp and accumulating arms control valves.

T P

Operation: Step 1.

T

STEP 1 PILOT POPPET

‘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 P

STEP 2

Step 2.

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 SEATING POPPET

T Step 3.

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.

P

STEP 3

T VALVE POPPET

T Step 4.

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

STEP 4

T T

VALVE POPPET

Step 5.

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.

P

STEP 5

T CHECK POPPET

T

As an anti-void or check valve 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 from ‘T’ to ‘P’.

P

ANTI-VOID CHECK OPERATION

T 18.4

Tigercat 845 Feller Buncher

Tree clamps and wrist

ANTI-CAVITATION RELIEF VALVE ADJUSTING PROCEDURE ADJUSTING NUT

•

JAMNUT, 1" WRENCH

•

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, Refer to the appropriate sections in this manual.

18.5

Tigercat 845 Feller Buncher

Tree clamps and wrist

TREE CLAMPS AND WRIST

The clamp arms are 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 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 the cylinder back to tank via the oil cooler.

CIRCUIT DESCRIPTION The accumulating and clamp 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 spool sections in the clamp and wrist 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.

For a description of the tree clamps and wrist control valve refer to THIS SECTION and for the joystick refer to SECTION 5 of this manual.

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 the cylinder back to tank via the oil cooler.

OUTLET SECTION

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.

•

ACCUM. ARMS 'OPEN' PORT RELIEF (3200 psi)

•

UPPER CLAMP ARMS 'CLOSE' PORT RELIEF (3200 psi)

•

WRIST 'LEFT' PORT RELIEF (3200 psi)

• MID INLET SECTION

OPEN

A

B

CLOSE

•

CLOSE

A

B

OPEN

•

LEFT

A

B

RIGHT

•

•

WRIST 'RIGHT' PORT RELIEF (3200 psi)

MAIN RELIEF (2700 psi) - 1 " WRENCH

SAW

•

WRIST AND CLAMPS CONTROL VALVE (WITH SAW SECTION) 845-19

UPPER CLAMP ARMS 'OPEN' PORT RELIEF (3200 psi)

•

•

GAUGE TEST PORT 04 JIC

GAUGE TEST PORT (FOR SAW) 04 JIC

ACCUM. ARMS 'CLOSE' PORT RELIEF (3200 psi)

18.6

Tigercat 845 Feller Buncher

Tree clamps and wrist

WARNING: 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: 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.

8.

AIR IN PILOT END CAPS Air accumulation in the pilot end caps of the main clamps and wrist 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.

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 ARMS CLOSE position (cylinder fully extended), check gauge pressure reading.

If less than 3200 psi., readjust clamps close port relief. Repeat above procedure until a gauge reading of 3200 psi is obtained.

1.

Park machine on level ground, lower the felling head to the ground, engage the swing brake and stop engine.

2.

Connect a 0 - 5000 p.s.i. pressure gauge to the clamp and wrist control valve test port.

The control valve is located on the fire wall behind the main valve.

3.

Turn the main relief adjusting nut all the way in.

If less than 3200 psi., readjust clamps open port relief. Repeat above procedure until a gauge reading of 3200 psi is obtained.

4.

Turn the port relief valve adjusting nuts out on the accumulating arms, wrist and clamp arms spool sections of the control valve until spring pressure is relieved and then turn adjusting nuts one full turn in.

11. Raise the boom and rotate the felling head fully to one side. While holding the joystick wrist finger switch depressed, check gauge pressure reading.

5.

Start the engine, and put the throttle control to the IDLE position. NOTE; It may be necessary to increase the engine RPM sufficiently to prevent the engine from stalling.

10. While holding the joystick thumb switch in the CLAMP ARMS OPEN position (cylinder fully retracted), check gauge pressure 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.

6.

Ensure the hydraulic oil temperature is at operating temperature.

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: During these procedures, Do Not hold thumb switch in the on position for longer than 5 seconds.

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; Unsrew the main relief valve adjusting nut 3 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.

WARNING: Ensure that no one is near the felling head during these procedures.

14. Remove pressure gauge.

18.7

Tigercat 845 Feller Buncher

Tree clamps and wrist

TREE CLAMP, ACCUMULATING ARMS AND WRIST CIRCUIT 845-21 (APRIL 98)

(SERIAL NO. 8450101 TO 8450249) 18.8

Tigercat 845 Feller Buncher

Tree clamps and wrist

TREE CLAMP, ACCUMULATING ARMS AND WRIST CIRCUIT 845-28 (APRIL 98)

(SERIAL NO. 8450261 TO 8450475) 18.9

Tigercat 845 Feller Buncher

Tree clamps and wrist

18.10