TIGERCAT 853E FELLER BUNCHER SERVICE MANUAL - PDF DOWNLOAD

SERVICE MANUAL TIGERCAT 853E FELLER BUNCHER TABLE OF CONTENTS

Issue 4.2, MARCH 2003

SECTION GENERAL SPECIFICATIONS ........................................................................................... ii SAFETY ............................................................................................................................ 1 USING HIGH SPEED DISC SAWS SAFELY............................ APPENDIX 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

853-SM00

853E Available Literature Operator's Manual ................................. Part No. 3993A Operator's Manual (French) .................. Part No. 4296A Service Manual (This Manual) .............. Part No. 4639A Parts Catalog ......................................... Part No. 3686A Hydraulic Adapters Book ....................... Part No. 1472A Hydraulic Hose assemblies Book ......... Part No. 3707A

Tigercat

®

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

Fax: (519) 442-1855

Tigercat 853E Feller Buncher SPECIFICATIONS:

General Specifications

DIMENSIONS WIDTH LENGTH HEIGHT

(With double grouser shoes) Over 24" tracks ............................. 10' 4" Less booms ................................... 17' 4" To top of skylight .................... 11' 6 3/4" Less removable skylight ...... 10' 10 1/4" GROUND CLEARANCE ............................. See below TAIL SWING ....................................................... 10' 0'' WEIGHT With boom, less felling head ..... 56,000lbs

(3,150 (5,280 (3,520 (3,310

mm) mm) mm) mm)

(3,050 mm) (23,900 kg)

POWER ENGINE ........... John Deere, 205 HP @ 2200 RPM COOLING ........ Steel finned radiator and oil cooler Suction engine fan Removable debris screen at air intake FUEL TANK ..... 200 gal. (US) (757L) capacity HYDRAULIC SYSTEM Full simultaneous control of all hydraulic functions TRACK/SWING/BOOM PUMP ....... Load sensing, Variable displ. piston, 90 gpm (US) @ 4,200 psi SAW PUMP ........................... Dedicated var. displ. piston, 24 gpm (US) @ 3,600 psi CLAMPS & SIDE TILT PUMP ........ Dedicated fixed displ. vane, 34 gpm (US) @ 2,700 psi DOOR\ROOF PUMP ............ Hyd. operated, electric motor driven RESERVOIR ......................... Pressurized, 50 Gal (US) (190L) FILTRATION ......................... Full flow return, located in hyd. reservoir BOOM CYLINDERS ............. 110 mm bore x 1047 mm stroke STICK/TILT CYLINDERS ..... 120 mm bore x 1221 mm stroke HORSE POWER CONTROL ...... Electronic speed sensing type TRACKS UNDERCARRIAGE ............ Track side frames include integral track guides and ramp angles at each end.

Removable roller access cover DRIVE ................................. Variable motors with integral brake valves Infinitely variable speed with low lock-out TRACTIVE EFFORT .......... 59,000 lbs (26,760 kg) GEARBOX .......................... Triple reduction planetary type with brake FRONT IDLER ................... Hydraulic track adjuster Spring shock absorber TRACK SLIDES, UPPER ........... Replaceable, welded TRACK ROLLERS, LOWER ....... (9) D6 size tractor type rollers TRACK SHOE ............................ 24" (610 mm) Width, Single grouser Optional ...................... Widths up to 36" (915 mm) 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

ROTATING UPPER SWING DRIVE .... 6.8 RPM (variable); 360° continuous rotation Swing bearing, 47" (1190 mm) ball circle dia.

Double reduction, swing drive planetary gearbox with brake Piston swing motor ENCLOSURE ...... Perforated plate used on side doors and rear for improved ventilation Independent hydraulic operated door and roof Vandal protection Smooth exterior to prevent debris accumulation BOOM SYSTEM (With 20" disc saw felling head) Maximum cut radius ....................................... 26' 7" Minimum cut radius ......................................... 14' 4" Boom envelope (swath) .................................. 12' 4" Lift capacity; Full reach ............................ 6,000 lbs

(8,100 mm) (4,370 mm) (3,760 mm) (2,720 kg)

OPERATOR'S STATION CAB ..................... Fully enclosed and insulated Removable skylight Removable rear sliding window with screen Air conditioner heater and defroster Lexan(TM) glazing Forward sloping windshield AM/FM Stereo cassette SEAT ................... Full 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 OTHER STANDARD EQUIPMENT Easily cleaned radiator air intake screen 2 Stage engine air cleaner Alarms for drive, low hyd. oil, enclosure doors Horn Toolbox ELECTRICAL BATTERY ..................... (2) 12 volt ALTERNATOR ............. 135 amp LIGHTING .................... (10) Flood lights for night operation (3) Service lights in engine enclosure FELLING HEAD Flexible hydraulic system can be tailored to accept various felling heads including shear heads up to 20" and high speed continuous rotation circular saws up to 20". with or without side tilt OPTIONAL EQUIPMENT Fire suppression system (Kidde)

WE RESERVE THE RIGHT TO AMEND THESE SPECIFICATIONS AT ANY TIME WITHOUT NOTICE DIMENSIONS ARE WITH DOUBLE GROUSER SHOES WHERE APPLICABLE

138.75" (3520mm) 130.25" (3310mm)

GROUND CLEARANCE 28.75" (730mm) TO TIP OF DOUBLE WE RESERVE THE RIGHT TO AMEND GROUSER SHOETHESE SPECIFICATIONS AT ANY TIME WITHOUT NOTICE 30.25" (770mm) TO TIP OF SINGLE GROUSER SHOE TO TIP OF TOOTH

142.5" (3620mm) 176" (4470mm) 319" (8100mm)

120" (3050mm)

5•796

ii

13.75" (350mm)

Tigercat 853E Feller Buncher

SECTION 1 - SAFETY MARCH 2003

CONTENTS - SECTION 1 BATTERY DISCONNECT SWITCH .................................................................. 1.5 COOLING SYSTEM .......................................................................................... 1.7 ENGINE DOORS .............................................................................................. 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 ......................................................................................................... 1.3 FLUID LEAKS ................................................................................................... 1.7 HYDRAULIC PRESSURE HAZARD .................................................................. 1.7 LOOSE CLOTHING HAZARD ........................................................................... 1.7 PARKING HAZARDS ........................................................................................ 1.5 PROTECTIVE CLOTHING ................................................................................ 1.2 SAFETY PRECAUTIONS, OPERATING ........................................................... 1.4 SAFETY PRECAUTIONS, SERVICING ............................................................ 1.6 SAFETY SYMBOLS .......................................................................................... 1.2 SIGNAL WORDS............................................................................................... 1.2

Tigercat 853E Feller Buncher

Safety

GENERAL SAFETY PRECAUTIONS

SAFETY SYMBOLS

Remember that safety is a prime responsibility of all.

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

This safety-alert symbol is used throughout this manual and on labels on the machine to call your attention to areas in which carelessness or failure to follow specific procedures may result in personal injury and/or component damage or malfunction.

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

Follow all instructions from safety inspector and supervisors.

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

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.

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

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

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

Repair or replace damaged labels.

1.2

Tigercat 853E Feller Buncher

Safety

GENERAL SAFETY PRECAUTIONS continued

KEEP BACK 300 FEET When approaching an operating machine on foot, stay at least 300 feet (90M) 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.

Machines should be completely cleaned of debris at least daily, particularily 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.

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

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.

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.

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.

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

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.

Approach with extreme caution any area where overhanging electrical powerlines 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.

Tigercat 853E Feller Buncher

Safety

OPERATING SAFETY PRECAUTIONS

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.

Powerlines 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.

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

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

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

During refuelling do not leave the filler nozzle unattended.

Avoid over filling and immediately clean up spilled fuel.

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

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

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

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

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

Sound the machine horn before starting the machine.

The operator’s seat is equipped with a seat belt. Use this belt at all times when operating the machine.

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Tigercat 853E Feller Buncher

Safety

OPERATING SAFETY PRECAUTIONS continued

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.

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

Use only prearranged and approved signalling practices.

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

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

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

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

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

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

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. Regulary inform other crew members of your intentions, location and length of time to perform duties.

When parking the machine; • Park on level ground only and engage the swing brake.

• Do not park on a hillside or incline.

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

Always rest the felling attachment on the ground when not operating, regardless if the engine is running or shut off.

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

1.5

• Lower felling attachment onto level ground.

• Stop the engine and relieve any hydraulic pressure trapped in the system by operating a joystick valve several times.

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

Tigercat 853E Feller Buncher

Safety

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.

SERVICING SAFETY PRECAUTIONS

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

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

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

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, the battery negative terminal must be disconnected. 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 .

1.6

Tigercat 853E Feller Buncher

Safety Shut off engine. Only remove engine radiator filler cap when cool enough to touch with bare hands.

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.

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

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

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

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.

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.

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 and relieve trapped pressure 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.

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

WARNING Do not exceed maximum posted weight capacity of side door by using as platform for heavy components or too many people.

ROOF

•

•

STRUT

ALWAYS install roof safety strut before working under roof area.

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

NEVER remove door safety chain.

1.7

Tigercat 853E Feller Buncher

Safety

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

Work in a ventilated area. If it is necessary to run an engine in an enclosed area, use an exhaust pipe extension to remove toxic exhaust fumes.

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

Dispose of fluids properly.

Do not pour fluids into the ground, stream, pond or lake.

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

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

1.8

Tigercat 853E 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.

1.9

Continued on page 10

Tigercat 853E Feller Buncher

Safety WHAT TO DO IN CASE OF A MACHINE FIRE

FIRE PREVENTION continued

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*

EQUIPMENT FIRES ADVERSELY EFFECT YOUR ABILITY TO LOG, MAY INCREASE YOUR INSURANCE PREMIUMS DRAMATICALLY OR PREVENT YOU FROM OBTAINING INSURANCE COVERAGE AT ALL.

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.

WHAT ELSE TO DO BEFORE YOU EXPERIENCE A FIRE

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

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

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

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

Use the PASS method with most extinguishers.

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

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

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.

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.

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.

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Tigercat 853E 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 853E 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

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using high speed disc saws safely FORWARD:

Tigercat

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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

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using high speed disc saws safely

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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.

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using high speed disc saws safely

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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.

Tigercat

®

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

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

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

8

using high speed disc saws safely

Tigercat

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

FIGURE 7a

PLAN VIEW OF MACHINE SHOWING CLOCKWISE AND COUNTERCLOCKWISE BLADE ROTATION

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

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

9

®

using high speed disc saws safely Comments and Instructions cont.

Tigercat

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

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

SLAB

•

SLAB

• FE

ED

IN

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

TH DIR ROW EC TIO N

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

FIGURE 8

THROW ENGAGEMENT DISTANCE FELLING HEAD MOVING INTO SLAB/LOG

®

SLAB

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

• •

FIGURE 8b SIDE VIEW

FEED IN

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

10

FIGURE 8c TOP VIEW

using high speed disc saws safely Comments and Instructions cont.

Tigercat

®

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

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

• FE

ED

IN

FELLING HEAD MOVING INTO LOG PILE

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

SMALL LOG

THROW ENGAGEMENT DISTANCE LOG PILE

FEED IN

•

•

A SAW HOUSING WITHOUT SNOUTS ALLOWS A LONG THROW ENGAGEMENT DISTANCE

FIGURE 9b SIDE VIEW

FIGURE 9c TOP VIEW

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

FEED IN

11

using high speed disc saws safely Comments and Instructions cont.

Tigercat

®

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

UNCUT TREE OR STUMP BACKUP THROW ENGAGEMENT DISTANCE

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

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

FELLING HEAD MOVING INTO LOG

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

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

FELLING HEAD MOVING INTO STUMP (FEED SPEED)

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

12

using high speed disc saws safely Comments and Instructions cont.

Tigercat

®

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

THROW GAP

FIGURE 12: SAW BLADE THROW GAP

13

using high speed disc saws safely Comments and Instructions cont.

Tigercat

®

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

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

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

FIGURE 13: SAW BLADE ENTRANCE AND EXIT SPACE

14

using high speed disc saws safely Comments and Instructions cont.

Tigercat

®

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

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

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

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

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

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

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

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

Do not over speed the blade rpm.

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

Do not neglect tooth fastening inspection, maintenance and replacement.

Do not neglect to repair worn or damaged saw housings.

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

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

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

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

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

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

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

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

Do not select and operate heads that throw rearward.

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

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

15

using high speed disc saws safely

Tigercat

16

®

Tigercat 853E Feller Buncher

SECTION 3 - LUBRICATION & MAINTENANCE DECEMBER 2000

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 LUBRICATING CYLINDER PINS AND BOOM JOINTS ................................ 3.4 LUBRICATION SCHEDULE ........................................................................... 3.7 NEW MACHINE MAINTENANCE ................................................................... 3.2 PRESSURE SETTING PROCEDURES. See SERVICE MANUAL PRESSURE SETTING VALUES. See SERVICE MANUAL, SECTION 4 PREVENTIVE MAINTENANCE SCHEDULE .................................................. 3.2 SCHEDULED MAINTENANCE EVERY 125 HOURS ................................................................................... 3.4 EVERY 24 HOURS: .................................................................................... 3.4 EVERY 250 HOURS ................................................................................... 3.5 EVERY 500 HOURS: .................................................................................. 3.5 EVERY 8 HOURS: ...................................................................................... 3.4 FREQUENTLY ............................................................................................ 3.4 TIGHTENING POINTS ................................................................................... 3.2 TORQUE CHART, GENERAL ........................................................................ 3.9 TORQUE SETTINGS, RECOMMENDED ....................................................... 3.8 TRACK TENSION .......................................................................................... 3.2

Tigercat 853E Feller Buncher

Lubrication and Maintenance

PREVENTIVE MAINTENANCE SCHEDULE FOR 853E FELLER BUNCHER NEW MACHINE MAINTENANCE IMPORTANT

THE FIRST 100 HOURS:~

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

REPLACE OIL IN:~ ENGINE AND CHANGE OIL FILTER:

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

SEE ENGINE OPERATOR'S MANUAL. TIGHTENING POINTS:~

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

CHECK TORQUE ON SWING BEARING RETAINING BOLTS ENGINE MOUNTING BOLTS

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

PUMP MOUNTING BOLTS TRACK SHOE BOLTS TRACK ROLLER RETAINING BOLTS SWING GEARBOX MOUNTING BOLTS CAB SECURING BOLTS

THE FIRST 25 HOURS:~

ANY OTHER LOOSE NUT, BOLT OR FITTING

REPLACE OIL IN:~ TRACK DRIVE GEARBOX

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

REPLACE:~ ENGINE FUEL FILTER HYD. OIL PRE-FILL FILTER HYD. OIL PILOT PRESSURE FILTER HYD. OIL RETURN FILTERS (IN TANK) TIGHTENING POINTS:~ ALL HYDRAULIC CONNECTIONS HOSE CLAMPS TRACK DRIVE GEARBOX TRACK DRIVE MOTOR MOUNTING BOLTS PIN RETAINERS ANY OTHER LOOSE NUT, BOLT OR FITTING

3.2

Tigercat 853E 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 ALWAYS INSTALL ROOF SAFETY STRUT WHEN WORKING IN ENGINE COMPARTMENT

þ CLEAN AROUND FILLER CAPS BEFORE CHECKING OR ADDING FLUIDS þ CLEAN AROUND HYDRAULIC FITTINGS BEFORE BREAKING CONNECTION. PLUG OR CAP IMMEDIATELY

þ CLEAN FIRE SUPPRESSION SYSTEM SENSORS

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 IS DISCONNECTED AND THE SPEED CONTROL 25 PIN CONNECTOR IN CAB. 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 Continued on page 4

3.3

Tigercat 853E Feller Buncher

Lubrication and Maintenance

SCHEDULED MAINTENANCE CHECK:~

FREQUENTLY:~

• FOR LEAKAGE AROUND HYDRAULIC COMPONENTS AND FLEXIBLE HOSES

• CHECK ENGINE COOLING AIR INTAKE SCREENS FOR POSSIBLE RESTRICTION

• FOR LOOSE NUTS, BOLTS AND FITTINGS • CONDITION AND TENSION OF FAN BELTS.

EVERY 8 HOURS:~

• VISUALLY CHECK CONDITION OF TRACKS.

• PERFORM FREQUENTLY MAINTENANCE AND IN ADDITION:~

• CONDUCT AN OVERALL VISUAL INSPECTION.

• CHECK ENGINE COOLANT LEVEL

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

• CHECK ENGINE OIL LEVEL • DRAIN FUEL/WATER SEPARATOR • CHECK AIR INTAKE PRECLEANER CLEAN BOWL AS REQUIRED • CHECK HYDRAULIC OIL LEVEL

EVERY 24 HOURS:~

• CHECK TRACK DRIVE GEARBOX OIL LEVEL WITH LEVEL PLUG IN HORIZONTAL POSITION

• PERFORM FREQUENTLY MAINTENANCE • PERFORM 8 HOUR MAINTENANCE AND IN ADDITION:~

LUBRICATE:~

• LUBRICATE SWING BEARING; 1-FITTING - 10 SHOTS

• SWING PINION; 1-FITTING - 10 SHOTS •

¯

•

¯

BOOM JOINTS; 7-FITTINGS - PURGE CYLINDERS; BOOM, STICK & TILT; 8-FITTINGS TOTAL - PURGE

EVERY 125 HOURS:~ • PERFORM FREQUENTLY MAINTENANCE

¯ LUBRICATING CYLINDER PINS AND BOOM JOINTS:-

• PERFORM 8 HOUR MAINTENANCE

1. PARK MACHINE ON LEVEL GROUND

• PERFORM 24 HOUR MAINTENANCE

2. COMPLETELY TILT FELLING HEAD BACK

AND IN ADDITION CHECK:~

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

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

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

• FLUID LEVEL IN BATTERIES UNLESS MAINTENANCE FREE

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

• ENGINE R.P.M. • ALL HYDRAULIC PRESSURES • HYDRAULIC PUMP AND MOTOR SECURING BOLTS

CLEAN:~ • OIL COOLER, ENGINE RADIATOR AND ENCLOSURE SCREENS

• TORQUE TIGHTENING POINTS AS PER NEW MACHINE MAINTENANCE

• REMOVE POTENTIALLY DAMAGING LIMBS OR STICKS

VISUALLY CHECK FOR DAMAGE TO:~

Continued on page 5

3.4

Tigercat 853E Feller Buncher

Lubrication and Maintenance

SCHEDULED MAINTENANCE Continued from page 4

• MAIN AND STICK BOOMS

THE GEARBOX. NOTE: DURING COLD WEATHER APPLICATIONS THE SWING FUNCTION MUST OPERATE FOR SEVERAL HOURS TO ACHIEVE OPERATING TEMPERATURE. CAUTION: DO NOT FORCE GREASE, GEARBOX FAILURE MAY RESULT. DO NOT USE WINTER GREASE. GREASE SHOULD PURGE FROM GEARBOX PINION SEAL.

• TRACKS, TRACK FRAMES AND CARBODY • SWING BEARING AREA • ATTACHMENT MAKE REPAIRS IMMEDIATELY VISUALLY INSPECT FOR:~ • FRAYED ELECTRICAL WIRING AND HYDRAULIC HOSES • WEAR IN ANY OTHER COMPONENTS

EVERY 500 HOURS:~

CLEAN/REPLACE:~

• PERFORM FREQUENTLY MAINTENANCE

• AIR CONDITIONER RE-CIRCULATION FILTER

• PERFORM 8 HOUR MAINTENANCE • PERFORM 24 HOUR MAINTENANCE

• CAB FRESH AIR FILTER

• PERFORM 125 HOUR MAINTENANCE

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

• PERFORM 250 HOUR MAINTENANCE AND IN ADDITION REPLACE:~ • AIR INTAKE SAFETY ELEMENT • HYD. OIL RETURN FILTER, CASE DRAIN

EVERY 250 HOURS:~

• HYD. OIL RETURN FILTERS (IN TANK)

• PERFORM FREQUENTLY MAINTENANCE

• HYD. OIL PILOT PRESSURE FILTER

• PERFORM 8 HOUR MAINTENANCE

LUBRICATE:~

• PERFORM 24 HOUR MAINTENANCE

• DOOR AND COVER HINGES 10 FITTINGS - 1 SHOT

• PERFORM 125 HOUR MAINTENANCE AND IN ADDITION:~

• ROOF AND DOOR CYLINDER PINS APPLY OIL LIBERALLY

• REPLACE ENGINE OIL AND FILTER

CHECK:~

• REPLACE ENGINE FUEL FILTER

• TORQUE ON SWING BEARING AND SWING GEARBOX RETAINING BOLTS

• REPLACE AIR INTAKE PRIMARY ELEMENT

• TORQUE ON TRACK DRIVE GEARBOXES AND MOTOR MOUNTING BOLTS

• REPLACE OIL IN TRACK DRIVE GEARBOXES WITH BOTH LEVEL PLUGS IN LINE WITH THE HORIZONTAL PLANE AND ABOVE

• 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.

• LUBRICATE SWING DRIVE GEARBOX LOWER BEARING; 2-FITTINGS - 5 SHOTS EACH¯

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

NOTE: DO NOT USE A POWER GREASE GUN ¯WITH GEARBOX AT OPERATING TEMPERATURE SLOWLY ADD 5 SHOTS OF LITHIUM BASED EP2 TO EACH SIDE OF 3.5

Tigercat 853E 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 OILS LISTED TO FILL OR REPLENISH THE HYDRAULIC SYSTEM.

Tigercat

HYDRAULIC OIL OPERATING RANGE (Not suitable for axle applications)

OPERATING TEMP. RANGE LOWEST START-UP TEMP.

HYDRAULIC OIL TEMPERATURE

OIL TYPE SHELL DONAX TD DONAX TDL TELLUS T22 TELLUS T68 TELLUS 100 SUNOCO SR TRACTOR HYDRAULIC FLUID CHEVRON TRACTOR HYDRAULIC FLUID EAST TRACTOR HYDRAULIC FLUID WEST IMPERIAL/ESSO HYDRAUL 56 HYDRAUL 50 CITCO PETROLEUM TRACTOR HYDRAULIC FLUID JOHN DEERE JDM J20C JDM20D ESSO UNIVIS N22 UNIVIS N68 PETRO CANADA DURATRAN WINTER HV22 HV60 HV80 TEXACO RANDO HD68 SUPERFLOW 22 SUPERFLOW AZ

CAUTION

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

3.6

5168A

REF. NUMBER

500 HOURS

250 HOURS

125 HOURS

EVERY SHIFT 8 HOURS

FIRST 25 HOURS

Tigercat 853E 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. 36 9.5 18L ( 4.75 USG) ANTIFREEZE ** 18L ( 4.75 USG) DISTLD. WATER

REP CHK

REP

2

ENGINE OIL/FILTER

REP

REP

3

FUEL FILTER (ENGINE)

1

REP

4

FUEL/WATER SEPARATOR FILTER

1

5

AIR INTAKE PRECLEANER

1 CLEAN BOWL AS REQ'D

6

AIR INTAKE PRIMARY ELEMENT

1 CHECK FILTER RESTRICTION INDICATOR WITH ENGINE RUNNING 1

DRN CHK

REP

REP 7 CHK

8

REP

REP 9

REP

CHK

REP D/R CHK

25

7

AIR INTAKE SAFETY ELEMENT HYDRAULIC RESERVOIR

190

50

PRE-FILL FILTER

SEE ENGINE MANUFACTURER’S SERVICE MANUAL

1 DRAIN AND REFILL AS REQ’D

BY SEASONAL OIL CHANGE SEE APPROVED HYD. OILS 1

REP 10 RETURN FILTERS, (IN TANK)

2

REP 11 PRESSURE FILTER, PILOT

1

D/R

12 TRACK DRIVE GEARBOX; CHECK WITH LEVEL PLUG IN HORIZONTAL POSITION CHK 13 TRACK ROLLERS AND IDLERS CHECK FOR OIL LEAKAGE

*** LUB 24 HRS

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

6

1.5

2 FILL WITH SAE 75W90 EP

7.6

2

1 IF LEAKING REMOVE AND REPAIR FILL WITH SAE 30 OR 40

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

LUB

16 BOOM AND STICK JOINTS

PURGE

7 LITHIUM BASE EP2 GREASE u

17 SWING GEARBOX LOWER BEARING *REFER TO 250 HOURS SCHEDULED MAINTENANCE FOR DETAILS

5SHOTS

2 LITHIUM BASE EP2 GREASE u

18 BOOM, STICK AND TILT CYLINDERS

PURGE

8 LITHIUM BASE EP2 GREASE u

1 SHOT

10 LITHIUM BASE EP2 GREASE u

LUB*

LUB

LUB 19 DOOR(S) AND ROOF HINGES LUB 20 DOOR CYLINDER PINS 21 FELLING ATTACHMENT

LUBRICATE

4 APPLY OIL LIBERALLY

SEE MANUFACTURERS MAINTENANCE SCHEDULE

u LITHIUM BASED EP2 GREASE CONTAINING MOLYBDENUM DISULFIDE **ANTIFREEZE MUST MEET GM 6038M SPECIFICATIONS • SEE ENGINE MANUFACTURERS MAINTENANCE MANUAL LEGEND:

ISSUE 4 1200

CHK - CHECK

REP - REPLACE

DRN - DRAIN

3.7

D/R - DRAIN AND REFILL

LUB - LUBRICATE

Tigercat 853E Feller Buncher

Lubrication and Maintenance

TORQUE CHART LOCATION

THREAD DIAMETER

TORQUE (LUBRICATED) lbf-ft Nm

Cylinders Piston nut, boom cyl.

Piston nut, stick/tilt cyl.

Cylinder end cap bolts Pin retaining bolts

M19 3/4" UNC

3000-3300 4250-4700 370-450 282-310

4000-4400 5800-6400 500-600 393-420

Boom joint pin bolts

3/4" UNC

282-310

393-420

Cab securing bolts

1" UNC

682-750

925-1020

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 5/8” UNC 1/2” UNC

450-500 160-175 55-65

620-680 215-235 75-85

Pump drive Drive plate to flywheel Bell housing to engine

3/8" UNC 3/8" UNC

33-36 33-36

45-49 45-49

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

3/4 UNF M16 3/4" UNC 7/8" UNC M20 M20 M20

T/T* 200 310 475 380 380 380

T/T* 275 420 646 515 515 515

*T/T represents Torque-turn, this is a method of torquing the track shoe bolts which is fully described in SECTION 11 of the Tigercat SERVICE MANUAL. Torque values pertaining to the engine and attachment are provided in the appropriate manuals.

3.8

Tigercat 853E 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

M6 M8 M10

CLASS 4.8 LUBRICATED DRY Nm lbf-ft Nm lbf-ft 4.8 3.5 6 4.5 12 8.5 15 11 23 17 29 21

CLASS 8.8 OR 9.9 LUBRICATED DRY Nm lbf-ft Nm lbf-ft 9 6.5 11 8.5 22 16 28 20 43 32 55 40

CLASS LUBRICATED Nm lbf-ft 13 9.5 32 24 63 47

10.9 DRY Nm lbf-ft 17 12 40 30 80 60

CLASS LUBRICATED Nm lbf-ft 15 11.5 37 28 75 55

12.9 DRY Nm lbf-ft 19 14.5 47 35 95 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 1000 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

3.9

Tigercat 853E Feller Buncher

Lubrication and Maintenance

3.10

Tigercat 853E Feller Buncher

SECTION 4 - HYDRAULIC SYSTEM CONTENTS - SECTION 4 CIRCUIT SCHEMATIC ............................................................................... 4.16, 4.17 ENGINE DOORS SCHEMATIC .................................................................. 4.16, 4.17 HIGH PRESSURE LIMITING CONTROL VALVE ................................................. 4.26 SET LOAD SENSE RELIEF VALVE ................................................................. 4.27 HYDRAULIC OIL RESERVOIR CHANGING HYDRAULIC OIL FILTERS ............................................................ 4.3 CHANGING HYDRAULIC OIL STRAINERS ...................................................... 4.4 PRESSURE REGULATOR SET-UP PROCEDURE ........................................... 4.7 RESERVOIR ............................................................................................. 4.4, 4.5 HYDRAULIC PUMPS MAIN PUMP ..................................................................................................... 4.8 MAIN PUMP CONTROL VALVE .................................................................... 4.28 SAW AND CLAMP PUMP ................................................................................. 4.9 SAW AND CLAMPS PUMPS Serial No. 8530400 and up .................................. 4.10 HYDRAULIC SYSTEM OPERATION ................................................................... 4.2 BOOM CYLINDERS .......................................................................................... 4.2 CIRCUIT DESCRIPTION ................................................................................... 4.15 FLOW ON DEMAND AND LOAD COMPENSATION ...................................... 4.15 CLAMP ARMS AND WRIST CIRCUIT ............................................................... 4.2 MAIN HYDRAULIC SYSTEM ............................................................................ 4.2 MARGIN PRESSURE ....................................................................................... 4.9 PILOT CIRCUIT ................................................................................................ 4.2 SAW CIRCUIT ................................................................................................... 4.2 SWING SYSTEM .............................................................................................. 4.2 LOAD SENSING BASIC DESCRIPTION ...................................................................................... 4.12 BASIC PRINCIPALS ......................................................................................... 4.11 MARGIN PRESSURE ....................................................................................... 4.9 OPERATING TIPS ............................................................................................ 4.14 SET LOAD SENSE RELIEF VALVE ................................................................. 4.27 SET MARGIN PRESSURE ............................................................................... 4.27 VERIFY ANTI-STALL SOLENOID SETTING (H.P. CALIB.) .............................. 4.28 MAIN CONTROL VALVE BOOM FUNCTIONS SPOOL SECTIONS .......................................................... 4.18 CONTROL VALVE SECTIONS ......................................................................... 4.18 CONTROL VALVE SPOOL OPERATION .......................................................... 4.21 DRIVE MOTOR SPOOL SECTIONS ................................................................. 4.18 MAIN CONTROL VALVE DESCRIPTION .......................................................... 4.18 MAIN PUMP CONTROL VALVE ........................................................................... 4.28 OPERATING TIPS ............................................................................................... 4.14 PRESSURE SETTINGS ...................................................................................... 4.29 SCHEMATIC DIAGRAMS ENGINE DOORS ..................................................................................... 4.16, 4.17 HIGH PRESS. LIMITING CONTROL ................................................................. 4.26 LOAD SENSING (FLOW ON DEMAND) ............................................................ 4.11 MAIN HYDRAULIC CIRCUIT ................................................................... 4.16, 4.17 MAIN PUMP & LOAD SENSE CONTROL ......................................................... 4.8 MAIN VALVE SECTION WITH HIGH PRESS. LIMITING CONTR .......... 4.18, 4.26

DECEMBER 2000

Tigercat 853E Feller Buncher

Hydraulic system

HYDRAULIC SYSTEM OPERATION

3. Clamp arms and wrist circuit 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.

The hydraulic system has four separate circuits; 1. Variable-displacement main hydraulic circuit.

2. Variable-displacement circuit for the saw.

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

4. Pilot circuit

4. Closed-centre pilot circuit.

1. The main hydraulic system This a closed centre system utilizing a variabledisplacement 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.

This feature improves fuel economy and reduces heat build up because horsepower is not wasted on excessive pump flow that is not being used.

Refer to LOAD SENSING HYDRAULIC SYSTEM in THIS SECTION. 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 ANTISTALL description in SECTION 9 of this manual.

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

2. Saw circuit On machine S/N 8530101 to 8530270; This circuit used a variable-displacement pressurecompensated piston pump which delivers oil to the variable-displacement bent-axis piston motor on the saw through a saw control valve. This valve has a solenoid controlled on-off function and a high pressure relief valve.

On machine S/N 8530371 and UP; This circuit uses a variable-displacement pressurecompensated piston pump which delivers oil to the variable-displacement 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.

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

The pilot circuit gets its oil from the main closed centre circuit which is reduced to the 400 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 resume button. Refer to PILOT SYSTEM description in SECTION 5 of this manual.

Boom cylinders 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.

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 spring-apply 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. Swing system This system has a bent-axis piston motor with crossover relief valves and a double reduction planetary gearbox which provides variable swing speeds from 0 to 6.8 rpm. A rotary manifold provides hydraulic connection to the carbody 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 automatically apply whenever the pilot oil supply is shut off. Refer to SWING in SECTION 15 of THIS MANUAL.

Tigercat 853E Feller Buncher

Hydraulic system

HYDRAULIC OIL RESERVOIR

FILTER/STRAINER SERVICE NOTE

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

Located at the right of the machine, the hydraulic reservoir has a capacity of 50 U.S. gallons (190 l).

The filters should be checked/changed when the FILTER BYPASS warning light in the cab comes ON. If the warning light is still ON after the filters have been changed, the return strainers should be examined for possible obstruction.

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

CHANGING HYDRAULIC OIL FILTERS

The filter box, which is a sealed compartment within the reservoir collects, filters and strains 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: 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.

The majority of return oil entering the reservoir passes through two replaceable filters housed in the filter box and two mesh type reusable strainers on the end of each return tube (on later machines).

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.

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

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

The pump is also used to initially pressurize the hydraulic reservoir to 3 PSI. 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, which has a reusable strainer connected to it, is also used to collect the pump 'case drain' return oil.

4.3

Refer to illustrations of EARLIER and LATER design hydraulic reservoirs.

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.

3. Open engine enclosure doors and install safety strut.

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

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

6. 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.

7. Disconnect and remove both hoses from filter covers.

8. Remove filter covers and filter bypass valves.

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

10. 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.

11. Close air vent valve and/or tighten breather cap.

12. 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, this will prime the tank and remove air from the filter box. Replace plug on fill hose.

Once engine is running, pressure in tank will be maintained by turbo air from the engine.

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

NOTE: Changing filters tends to aerate the hydraulic oil. For maximum pump life, the machine should sit for one hour after servicing to allow entrained air to escape prior to applying working pressures to the pumps.

Continued on page 4

Tigercat 853E Feller Buncher

Hydraulic system •

AIR BLEED CAP

•

•

FILTER COVER

•

'O' RING

BYPASS VALVE

FILTER

•

BREATHER CAP

•

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

• •

FILTER BOX SIGHT GAUGE

•

•

•

•

STRAINER COVER

RETURN TUBE

• •

• SUCTION STRAINER

'O' RING

HYD. OIL FILL PORT

• •

• OIL HEATER

• CROSS SECTION 'A' 'A' 1197DIL2

• DRAIN PLUG

HYDRAULIC RESERVOIR (Serial Number 8530101 to 8530270)

Continued from page 3

CHANGING STRAINERS 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.

3. Open engine enclosure doors and install safety strut.

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

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

4.4

6. 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.

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

8. On later machines (serial number 8530221 and up), disconnect wire to temperature sender on access cover.

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

Tigercat 853E Feller Buncher

Hydraulic system •

AIR BLEED CONNECTION

•

•

FILTER COVER

•

'O' RING

BYPASS VALVE

FILTER

•

VENT/FILTER PRESS. GAUGE, HYD. TANK

• •

BALL VALVE, FILTER BOX AIR VENT AIR REGULATOR

HYD. OIL FILL PORT

•

FILTER BOX

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

• •

• •

SECONDARY SIGHT GAUGE\LOW LEVEL SENDER

•

RETURN TUBES WITH STRAINERS

ACCESS COVERS WITH 'O' RING SEAL

• •

•

• •

•

STRAINER SUCTION TUBES

•

•

PUMP CASE DRAIN AND FILTER BOX AIR EXHAUST

•

SUCTION TUBES

• •

•

•

OIL HEATER

CROSS SECTION 'A' 'A' 1511DIL

•

SIGHT GAUGE/ LEVEL SENDER WITH OIL TEMP GAUGE

• DRAIN PLUG

HYDRAULIC RESERVOIR (Serial Number 8530371 and up)

10. Unbolt access cover and carefully remove from tank. Note orientation of cover for reinstallation.

11. Remove oil strainers from return tubes.

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

13. Install new O-ring on strainer cover. Carefully insert strainers into hydraulic tank and bolt cover in place.

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

16. Remove filter covers and filter bypass valves.

17. 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.

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

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

15. Disconnect and remove both air bleed hoses from filter covers.

4.5

Continued on page 6

Tigercat 853E Feller Buncher

Hydraulic system

Continued from page 5

20. Close air vent valve and/or tighten breather cap.

21. 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, this will prime the tank and remove air from the filter box. Replace plug on fill hose.

Once engine is running, pressure in tank will be maintained by turbo air from the engine.

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

Note: Changing strainers and filters and replacing the hydraulic oil tends to aerate the oil. For maximum pump life, the machine should sit for 1 hour after servicing to allow entrained air to escape prior to applying working pressures to the pumps.

4.6

Tigercat 853E 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 853E Feller Buncher

Hydraulic system

MAIN PUMP CONTROL VALVE

MAIN PUMP (LINDE)

WRIST AND CLAMPS PUMP

SAW PUMP

•

•

• •

• •

SAW PUMP LOAD SENSING COMPENSATOR

BELL HOUSING

PUMP ASSEMBLY (VIEWED FROM SIDE ON S/N 8530101 - 8530270)

PUMP-1

HYDRAULIC PUMPS 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 and boom functions. Connected to the main pump is the pressure compensated piston saw pump, this is combined with a fixed vane pump used for the wrist and clamps functions. These pumps are mounted one behind the other as shown.

MAIN PUMP The main pump is a Linde HPR, axial-piston, variabledisplacement pump with load sensing, pressure cutHORSEPOWER CALIBRATION DO NOT ADJUST

•

ENGINE ANTI-STAL SOLENOID VALVE

• •

•

• GAUGE TEST PORT 'X1' ANTI-STALL SIGNAL PRESSURE

MARGIN PRESSURE ADJUSTING SCREW

MAIN PUMP 853MP-2

•

MAIN PUMP CONTROLLER (LS CONTROL)

off 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 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 Figure 853sm15.

853sm15

MAIN PUMP & LOAD SENSE CONTROL SCHEMATIC DIAGRAMS 4.8

Tigercat 853E Feller Buncher

Hydraulic system

MAIN PUMP CONTROL VALVE

MAIN PUMP (LINDE)

WRIST AND CLAMPS PUMP

SAW PUMP

• •

••

•

•

100-1-1

SAW PUMP PRESSURE COMPENSATOR

PUMP ASSEMBLY ~ (VIEWED FROM SIDE ON Serial No. 8530371 to 8530399) 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 thus draining oil from the back side of the swashplate control cylinder to tank through an orifice.

This increases the swashplate angle and the pump output increases in volume until the pump output pressure reaches the point where it exceeds LS pressure by a small amount, this is known as MARGIN PRESSURE. Refer to SET MARGIN PRESSURE in this section.

Also refer to VERIFY ANTI-STAL 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 LINDE MAIN VALVE MANIFOLD

'P' GAUGE TEST PORT

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 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.

SAW AND CLAMP PUMP Serial No. 8530101 to 8530399 The saw and clamp pump is a hybrid Denison having an axial-piston, variable-displacement section at the shaft end for the saw function and a vane pump section at the rear for the wrist and clamp functions.

For the operation and adjustments of this pump refer to SAW DRIVE description in SECTION 17 of this manual.

Continued on page 8

•

HIGH PRESSURE LIMITING CONTROL

PAB18

• •

•

L.S. GAUGE TEST PORT

GAUGE TEST PORTS 4.9

Tigercat 853E Feller Buncher

Hydraulic system STANDBY VALVE

P.O.R. VALVE (3600 PSI) PRESSURE COMPENSATOR VALVE

SAW PUMP (LINDE)

••

•

••

WRIST AND CLAMPS PUMP (DENISON)

• •

• MAIN PUMP (LINDE)

PUMP ASSEMBLY (SERIAL NO. 8530400 AND UP) 144-16A

Continued from page 7

SAW PUMP Serial No. 8530400 and up For the operation and adjustments of SAW PUMP refer to SECTION 17 of this manual.

WRIST AND CLAMPS PUMP Serial No. 8530400 and up 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.

4.10

Tigercat 853E Feller Buncher

Hydraulic system

LOAD SENSING 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 creates heat. SEE FIGS. 1 & 2.

FLOW

W

853SM18

FIG. 1

FIXED DISPLACEMENT PUMP

USED PRESSURE FIG. 2

=CO NST

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.

ANT

FLOW

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

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

SEE FIGS. 5 & 6.

853SM16

HP

Figs. 3 & 4 In an attempt to recover some of the wasted energy, variable volume pumps evolved.

These pumps are power regulated or horsepower controlled and since they reduce the pumps output to maintain a constant system hp, oil flow over the relief valve is less, therefore reducing the wasted power losses and heat generation.

SEE FIGS. 3 & 4.

WASTED

WASTED

W 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 853E Feller Buncher

Hydraulic system

LOAD SENSING BASIC DESCRIPTION OPEN CENTRE Vs. CLOSED CENTRE

Open centre system:

853SM21 853SM20

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

853SM20

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

853SM21

When the control valve lever is moved to actuate a cylinder or motor, the open center passage is blocked off in proportion to the amount the lever is moved.

This creates back pressure forcing oil into the valve workport to move the load.

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

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

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

853SM20

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

4.12

Tigercat 853E Feller Buncher

Hydraulic system

LOAD SENSING BASIC DESCRIPTION OPEN CENTRE Vs. CLOSED CENTRE...continued:

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 is zero.

The pump’s output flow is controlled by a “stroking piston” which is connected to the pump output, and to the valve’s workport or “load”. This sense line to the actual working load defines the system as load sensing.

The key component in the system above is the spring in the stroking piston. The pump’s output pressure must be 300 p.s.i. higher than the load pressure to compress the spring and reduce the flow of the pump. This 300 p.s.i. is the differential or margin pressure.

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 300 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 pressure, between the pump and load pressures can be maintained by the stroking piston regardless of load.

It is important to remember the pump is really responding to the pressure differential resulting from flow through the valve, not the actual load pressure level.

853sm22

853sm22

In the figure above the valve is closed blocking the pump from the load. With the load at zero the pump will maintain 300 p.s.i. of standby pressure and pump flow is zero.

853sm22

The following are key differences from open centre systems;

853sm22

When the control valve lever is moved to actuate a cylinder or motor, the control valve opens the pump to the load. In this case the load is zero and the pump output pressure falls as the oil escapes through the valve. The 300 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 300 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 output pressure, and the stroking piston will stop moving.

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.

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.

Tigercat 853E Feller Buncher

Hydraulic system

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 853E Feller Buncher

Hydraulic system

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

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

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 and 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 ( 500 psi). The swing, boom, stick and tilt control valves trap oil in their circuits when the spools are in neutral.

The right and left track control valves are motor spools which have a passage between the work ports and return when the spool is in neutral. The counterbalance valves in the motor circuit trap the oil in the motors. Oil returning to the tank from the control valves must open restrictors 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 build up in the hydraulic system. Load compensation means that all functions will continue to receive oil regardless of their pressure and without further movement of the control levers.

Without this system, an operator moving control levers halfway on the boom up and stick out controls would find that the lowest pressure function would move and the other would not move. In order 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.

4.15

With the load compensation on this unit the operator does not need to continually move 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 pressure to move functions simultaneously.

Tigercat 853E Feller Buncher

853SM23

Hydraulic system

MAIN HYDRAULIC CIRCUIT (Serial No. 8530101 to 8530392; 8530394 to 8530399) 4.16

Tigercat 853E Feller Buncher

853SM55

Hydraulic system

MAIN HYDRAULIC CIRCUIT (Serial No. 8530393; 8530400 and up) 4.17

Tigercat 853E Feller Buncher R.H. TRACK DRIVE

MAIN BOOM CYLINDERS

Hydraulic system

SWING

STICK CYLINDER

HIGH PRESSURE LIMITING CONTROL

TILT CYLINDER

L.H. TRACK DRIVE CONTROL VALVE MANIFOLD

•

• •

•

123-2-1

•

•

•

•

MAIN CONTROL VALVE

MAIN CONTROL VALVE DESCRIPTION

CONTROL VALVE SECTIONS

The main control valve consists of six individual valve sections and a high pressure limiting relief valve. 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 top pilot cap. The bottom caps are self bleeding. Spool travel stop screws are fitted in the pilot end caps and are used to limit the spool travel so that maximum speed may be limited on any 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 discharge 2. Two passages for return

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 slowing the movement of the control spool for more control of the function.

3. Two for load sensing.

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.

SCHEMATIC DIAGRAM OF MANIFOLD & A VALVE SECTION WITH RELIEF

853SM24

4.18

Tigercat 853E 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) 4.19

Tigercat 853E Feller Buncher

Hydraulic system

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.

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.

•

WORK PORT

• RETURN

RELIEF OPERATION

90744-6A

LOW WORK PORT PRESSURE

•

WORK PORT

• RETURN

ADJUSTING PROCEDURE 90744-5A

ANTICAVITATION OPERATION

1. Loosen locknut.

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

PORT RELIEF VALVE

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

LOCKNUT • 17mm WRENCH

• •

4. Re-check pressure gauge reading.

• • MAIN VALVE BODY

90744-4

4.20

ADJUSTING SCREW • 5mm ALLEN KEY

MAIN VALVE PORT RELIEF VALVE

Tigercat 853E Feller Buncher

Hydraulic system

CONTROL VALVE SPOOL OPERATION To achieve load sensing compensation, each control spool has two compensator valves and two shuttle valves.

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 500 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.

4.21

Tigercat 853E 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.

4.22

Tigercat 853E Feller Buncher PILOT OIL

Hydraulic system

(1) COMPENSATOR VALVE

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'

(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.

4.23

Tigercat 853E 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’.

4.24

Tigercat 853E 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.

4.25

Tigercat 853E 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 operates as follows:

•

•

First, it has a relief valve (P2) which limits L.S. pressure to 4000 psi, (Gauge at 'L.S.' test port) which in turn limits the pump output pressure to 4300 psi. (Gauge at 'P' test port) The 300 psi differential is known as margin pressure. See SET MARGIN PRESSURE in THIS SECTION.

•

•

SYSTEM RELIEF VALVE NON-ADJUSTABLE

Margin pressure is visible while a function of the load sense system, typically a boom cylinder, is bottomed out. In this case a pressure gauge at 'L.S.' port would read 4000 psi and a gauge at 'P' port would read 4300 psi. (Provided that margin pressure has been correctly set at 300 psi).

P1. SCREWED FULLY IN NOT USED

•

The second 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.

853SM24

P2 L.S. PRESSURE LIMIT, SET AT 4000 PSI. GAUGE ON L.S. TEST PORT • 4mm ALLEN KEY • 13mm WRENCH

PAB18-1

HIGH PRESSURE LIMITING CONTROL VALVE

SCHEMATIC DIAGRAM OF H.P.L. CONTROL, MANIFOLD & A VALVE SECTION WITH PORT RELIEFS 4.26

Tigercat 853E Feller Buncher

Hydraulic system SET MARGIN PRESSURE

SET LOAD SENSE RELIEF VALVE

MARGIN PRESSURE is the difference between the LOAD SENSE pressure and the PUMP OUTPUT pressure while a function (boom, swing or travel) is being operated. For the load sensing system to operate correctly the differential pressure between L.S. and 'P' should be 300 psi.

'P' being higher than L.S.

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 'L.S.' gauge test port on back of main control valve manifold.

LINDE MAIN VALVE MANIFOLD

'P' GAUGE TEST PORT

•

HIGH PRESSURE LIMITING CONTROL

PAB18

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.

The margin pressure adjustment is made at the main pump controller attached to the main pump.

The pressure gauge connections are the 'L.S.' and 'P' gauge test ports on the Linde main valve manifold.

•

HORSEPOWER CALIBRATION DO NOT ADJUST

•

•

ENGINE ANTI-STAL SOLENOID VALVE

• • •

L.S. GAUGE TEST PORT

•

•

GAUGE TEST PORTS

2. Start engine and set throttle control at ABOVE IDLE 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 4000 psi. Tighten locknut on adjusting screw and re-check pressure reading on gauge.

L.S. pressure relief valve is now set to 4000 psi.

5. Stop engine and remove pressure gauge.

GAUGE TEST PORT 'X1' ANTI-STALL SIGNAL PRESSURE

MARGIN PRESSURE ADJUSTING SCREW

MAIN PUMP 853MP-2

•

MAIN PUMP CONTROLLER (LS CONTROL)

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

*

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 300 psi greater than 'L.S.'.

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. Place STICK BOOM joystick lever in FULL UP position and fully extend cylinder (bottom out cylinder).

Continued on page 26

4.27

Tigercat 853E Feller Buncher

Hydraulic system

PILOT PRESSURE 11.3 mm

ENGINE ANTI-STALL PROPORTIONAL SOLENOID VALVE

•

•

•

HORSEPOWER CALIBRATION • 5mm ALLEN KEY • 17mm WRENCH

TANK

« DO NOT ADJUST!

LOAD SENSE PRESSURE

THIS DOES NOT INCREASE OR DECREASE HP. GAUGE TEST PORT 'X1'

•

•

•

•

•

•

•

PUMP OUTLET PRESSURE PUMP SWASH CONTROL PASSAGE 90669

8 mm

TANK

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

MAIN PUMP CONTROL VALVE

Continued from page 25

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

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 300 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.

VERIFY ANTI-STALL SOLENOID SETTING (H.P. CALIBRATION) Also refer to ENGINE ANTI-STALL in SECTION 9 of THIS MANUAL. This calibration is factory set and although an adjusting screw is provided, it should not be tampered with.

It DOES NOT increase or decrease HP. If however the setting is suspected of being incorrect, the following procedure can be used.

4.28

1. With the hydraulic oil at operating temperature, Loosen locknut on horsepower calibration adjusting screw and turn adjusting screw until exposed screw length is 11.3mm (this length is from the end of the adjusting screw to the top surface of the nut.).

2. Connect a 0-500 psi pressure gauge to the 'X1' gauge test port on the main pump control valve.

3. Start engine and set engine speed to 2210 RPM. 4. Place engine anti-stall switch in the ON position.

5. Turn adjusting screw until a gauge reading of 5 - 10 psi is obtained at 'X1' port.

6. Set engine speed to 2050 RPM or lower and verify a gauge reading of 360 psi. (NOTE; This reading can vary slightly) Turn adjusting screw if necessary to obtain this reading and repeat steps (3) thru' (6).

7. Set engine speed to 2260 RPM. 8. Pressure gauge at 'X1' should read 0 psi.

9. Remove pressure gauge.

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

Also refer to ENGINE ANTI-STALL in SECTION 9 of THIS MANUAL.

Tigercat 853E Feller Buncher

Hydraulic system

PRESSURE SETTINGS (AT 130°F) WITH KOEHRING WATEROUS 20" SAW FELLING HEAD ENGINE RPM (With John Deere 6076AF & 6081 engines) FULL THROTTLE, NO LOAD, MAX. ........................... 2375 RPM IDLE, NO LOAD ..................................................... 800-1000 RPM RATED WORKING ..................................................... 2200 RPM L.H. FINAL DRIVE CROSSLINE RELIEFS ................................................ 4800 PSI START OF REGULATION .......................................... 3100 PSI BRAKE RELEASE ..................................................... 500 PSI SPEED: CREEP ......................................................... 13 RPM MAX. FAST ............................................................ 28 RPM MAX. MOTOR 'X' DIMENSION .............................. 15.75MM (0.62") WITH 80MM (3.15") R.H. FINAL DRIVE CROSSLINE RELIEFS ................................................ 4800 PSI START OF REGULATION .......................................... 3100 PSI BRAKE RELEASE ..................................................... 500 PSI SPEED: CREEP .......................................................... 13 RPM MAX. FAST ............................................................. 28 RPM MAX. MOTOR 'X' DIMENSION .............................. 15.75MM (0.62") WITH 80MM (3.15") MAIN PUMP START OF ANTI-STALL OUTPUT ............................. 2150 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 BOOM PORT RELIEFS .............................................. 4600 PSI STICK PORT RELIEFS ............................................... 4600 PSI TILT PORT RELIEFS .................................................. 4600 PSI MARGIN PRESSURE ................................................. 300 PSI PILOT SUPPLY MAIN RELIEF ................................................... 400 PSI SWING CROSSLINE RELIEFS ................................................ 3300 PSI SPEED ........................................................................ 6 - 7 RPM SAW PUMP (Koehring Waterous felling head) PRESSURE OVERRIDE ............................................. 3600 PSI STAND-BY ................. S/N 8530101 TO 8530270 ..... 500 PSI .................................... S/N 8530371 AND UP ............ SCREW IN FULLY (LOCKED OUT) SAW CONTROL VALVE MAIN RELIEF .............................................................. 4000 PSI SAW MOTOR (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 DOOR / ROOF PUMP MAIN RELIEF ................................................................. 2000 PSI

NOTE: The above values are for referance purposes only, SEE SERVICE MANUAL FOR SETTING PROCEURES. ISSUE 8 1200

4.29

Tigercat 853E Feller Buncher

Hydraulic system

4.30

Tigercat 853E Feller Buncher

SECTION 5 - PILOT SYSTEM MAR. 97

CONTENTS - SECTION 5 ACCUMULATOR ............................................. 5.5 CIRCUIT SCHEMATIC .................................... 5.7 CONTROL VALVE ARRANGEMENT Serial No. 8530101 to 8530270 .................... 5.2 Serial No. 8530371 to 8530399 .................... 5.3 Serial No. 8530400 and up ........................... 5.4 FOOT PEDAL EXPLODED VIEW ..................................... 5.10 SCHEMATIC DIAGRAM .............................. 5.8 JOYSTICK HANDLE CONTROL VALVE EXPLODED VIEW ....................................... 5.9 SCHEMATIC DIAGRAM .............................. 5.8 SPOOL ARRANGEMENT ............................ 5.8 PILOT CIRCUIT DESCRIPTION ..................... 5.2 PILOT FILTER ......................................... 5.3, 5.5 PILOT SUPPLY MANIFOLD .................... 5.3, 5.6 PILOT SUPPLY VALVE Serial No. 8530101 to 8530399 .................... 5.5 Serial No. 8530400 and up ........................... 5.5 SET FLOW CONTROL .................................... 5.5 SET PILOT FLOW CONTROL ........................ 5.5 SET PILOT PRESSURE .................................. 5.6

Tigercat 853E Feller Buncher

Pilot system

PILOT OIL CIRCUIT

the pilot circuit.

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

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

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

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 flow control valve is a cartridge valve which can be adjusted from 0.1 to 6 gpm. flow rate. 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

On later machines (S/N 8530400 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.

FLOW CONTROL AND RELIEF VALVE

PILOT MANIFOLD

MAIN VALVE

CONTROL VALVE ARRANGEMENT (Serial No. 8530101 to 8530270) 70-12

5.2

Tigercat 853E Feller Buncher

Pilot system

••

'T' TANK PORT

••

'P'PRESSURE PORT

PILOT FILTER

•

69-9

PILOT FILTER

Continued on page 4

TRACK LOW

•

SWING BRAKE

••

WRIST RIGHT

•• ••

CLAMP OPEN

•• •• ••

After leaving the pilot supply valve the oil is filtered by an inline pressure filter before entering the pilot manifold. This filter is a cartridge filter with a built-in differential pressure relief valve which will bypass pilot oil to the tank if the pressure differential exceeds 50 psi. This will result in low pilot pressure. In cases of loss of controls or slow response the condition of this filter should be suspected.

The pilot oil is distributed by the pilot manifold.

••

ACCUM. CLOSE

WRIST LEFT

CLAMP CLOSE

ACCUM. OPEN GAUGE TEST PORT

••

•

• ••

•

123-7

PILOT SUPPLY CONTROL INLET PORT FROM FILTER 'P'PRESSURE PORT 'T' TANK PORT

PILOT SUPPLY MANIFOLD

CLAMPS, WRIST AND SAW VALVE SAW SECTION OF VALVE

•

•

•

FLOW CONTROL AND RELIEF VALVE

SAW PILOT VALVE PILOT MANIFOLD

MAIN VALVE

•

•

• SWING MOTOR

•

123-4

•

CONTROL VALVE ARRANGEMENT (Serial No. 8530371 to 8530399) 5.3

Tigercat 853E Feller Buncher

Pilot system

Continued from page 3

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.

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. 123-7 shown on the previous page.

The accumulator is installed to ensure 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 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.

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 and the coil contacts close the circuit between wires 6 and 33. Wire 33 connects to the armrest switch.

When this solenoid is energized, (armrest down and pilot reset) pilot oil is supplied to the pilot circuit. On later machines the accumulator is also charged up.

When this solenoid valve is de-energized, (armrest

CLAMPS, WRIST AND SAW VALVE SAW SECTION OF VALVE

• PILOT SUPPLY PRESSURE REDUCING/ RELIEVING VALVE

•

• SAW PILOT VALVE

• PILOT MANIFOLD

MAIN VALVE

••

SWING MOTOR

•

123-4-1X

•

•

CONTROL VALVE ARRANGEMENT (Serial No. 8530400 and up) 5.4

Tigercat 853E Feller Buncher

Pilot system ADJUSTING SCREW

• • •

LOCKNUT

ACCUMULATOR

FLOW CONTROL VALVE CARTRIDGE

•

PILOT RELIEF VALVE CARTRIDGE

•

PILOT FILTER

70-19

PILOT ACCUMULATOR (Serial No. 8530400 and up) 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.

•

PILOT SUPPLY VALVE (Serial No. 8530101 to 8530399)

•

160-01

PRESSURE REDUCING/ RELIEVING VALVE CARTRIDGE

ADJUSTING SCREW

• •

LOCKNUT

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.

SET PILOT FLOW CONTROL (Serial No. 8530101 to 8530399)

70-19-2

1. The engine need not be running to adjust the flow control valve.

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

3. Turn adjusting screw OUT 4 FULL TURNS (counterclockwise). Tighten locknut.

Continued on page 6

5.5

PILOT SUPPLY VALVE (Serial No. 8530400 and up)

Tigercat 853E Feller Buncher

Pilot system

Continued from page 5

0-1000PSI GAUGE CONNECTION. "TEE" INTO PILOT MANIFOLD P1 PORT

PILOT SUPPLY CONTROL

SET PILOT PRESSURE

••

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.

••

•

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.

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.

123-7-1

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

'T' TANK PORT

GAUGE TEST PORT

••

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 425 psi.

PILOT SUPPLY MANIFOLD (Serial No. 8530101 to 8530270)

••

••

PILOT SUPPLY CONTROL

INLET PORT FROM FILTER

••

'P'PRESSURE PORT

•

123-7

PILOT SUPPLY MANIFOLD (Serial No. 8530371 to 8530399)

7. Swing with swing brake ON to raise system pressure and check pilot pressure again.

PILOT SUPPLY CONTROL

8. Stop engine, remove gauge and reinstall cap.

•• 'P2'PRESSURE PORT

•• •

TO ACCUMULATOR

GAUGE TEST PORT

••

144-6

5.6

PILOT SUPPLY MANIFOLD (Serial No. 8530400 and up)

Tigercat 853E Feller Buncher

853SM12

Pilot system

PILOT SUPPLY CIRCUIT

5.7

Tigercat 853E 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. Operated by hand this valve directs pilot oil to the main control valve pilot end caps. The corresponding spool valve then shifts from its centre position and directs pump flow to operate a function.

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).

At the same time the regulating spool (2) is moved through the regulating spring (3).

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

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

T

P

WORK PORTS 1, 2, 3 OR 4

RR-11

SPOOL ARRANGEMENT

RR-12

JOYSTICK PILOT VALVE

853SM14 853SM13

JOYSTICK PILOT VALVE SCHEMATIC

FOOT PEDAL SCHEMATIC 5.8

Tigercat 853E Feller Buncher

AW002-A,B,C

Pilot system

JOYSTICK HANDLE AND CONTROL VALVE 5.9

Tigercat 853E Feller Buncher

AU009

Pilot system

FOOT PEDAL AND CONTROL VALVE 5.10

Tigercat 853E Feller Buncher

SECTION 6 - ELECTRICAL, GAUGES AND ALARMS MAR. 97

CONTENTS - SECTION 6 GAUGES AND ALARMS ............................................................................ 6.6 SCHEMATIC DIAGRAMS ALARM CIRCUIT .................................................................................... 6.7 COMPLETE MACHINE Serial No. 8530101 to 8530410 .................. 6.2, 6.3 COMPLETE MACHINE Serial No. 8530411 and up ......................... 6.4, 6.5 SENSOR DETAILS .................................................................................... 6.6 SWITCH AND SENSOR LOCATIONS Serial No. 8530101 to 8530270 ............................................................... 6.8 Serial No. 8530371 to 8530399 ............................................................... 6.9 Serial No. 8530400 and up .................................................................... 6.10 WIRE COLOUR CODE CHART ................................................................. 6.6

Tigercat 853E Feller Buncher

853SM38

Electrical, gauges and alarms

MACHINE SCHEMATIC DIAGRAM 2349B REV. 2(SHEET 1) Serial No. 8530101 to 8530410 6.2

Tigercat 853E Feller Buncher

853SM39

Electrical, gauges and alarms

MACHINE SCHEMATIC DIAGRAM 2349B REV. 2 (SHEET 2) Serial No. 8530101 to 8530410 6.3

Tigercat 853E Feller Buncher

853SM49

Electrical, gauges and alarms

MACHINE SCHEMATIC DIAGRAM 4171B REV. 0 (SHEET 1) Serial No. 8530411 and up 6.4

Tigercat 853E Feller Buncher

853SM39

Electrical, gauges and alarms

MACHINE SCHEMATIC DIAGRAM 4171B REV. 0 (SHEET 2) Serial No. 8530411 and up 6.5

Tigercat 853E 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 the OPERATOR'S MANUAL

The 853E 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 or when the engine enclosure doors are opened or closed.

SENSOR FUNCTION

GAUGE/LIGHT LIGHT COMBINATION* ONLY GAUGE RANGE

*The gauge/light combination gauges refered to in the chart below may be substituted by gauges without a warning light included.

HORN

TRIGGER (LIGHT TURNS ON OR HORN SOUNDS)

Engine coolant temp. ....... 100°F - 280°F ........ - ............ - ...................... 215°F (101°C) high (38°C) - (138°C)

Engine oil pressure ............. 0 - 100 psi ........... - ............ - ............................. 18 psi Low Engine hours ............................... - ................... - ............ - ......................... Engine running Hydraulic oil temp. ............ 100°F - 240°F ........ - ............ - ...................... 185°F (85°C) High (38°C) - (116°C)

Volts ...................................... 8v - 18v ............. - ............ - .............. 10.5VDC Low/15.5VDC High Fuel level ................................. 'E' - 'F' .............. - ............ - ...................... 20 Gals (US) (76L) Hydraulic oil - low ........................ - ................. ON .......... - ................... 7 Gal. (27L) below Full Hydraulic oil -Very low ................ - ................. ON ........ ON ................ 17 Gal. (64L) below Full Hydraulic oil filter bypass ............ - ................. ON .......... - ..... Return filter restriction, 15 psi or greater Pump inlet ................................... - ................. ON .......... - ...... Pump inlet pressure drops below 2 psi Low coolant ................................. - ................. ON .......... - ....................... Low coolant level Power door alarm ........................ - ................... - .......... ON ........... Engine doors opening/closing Back-up alarm ............................. - ................... - .......... ON ....... One or both drive pedals in reverse Horn ............................................. - ................... - .......... ON ............. Push button on L.H. joystick

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)

6.6

Tigercat 853E Feller Buncher

853SM36

Electrical, gauges and alarms

GAUGES AND ALARM SCHEMATIC DIAGRAM 6.7

Tigercat 853E Feller Buncher

Electrical, gauges and alarms HYDRAULIC OIL LEVEL SENDERS (1;LIGHTS 2;HORN)

HYDRAULIC OIL TEMPERATURE SENDER (GAUGE)

BACK-UP AND POWER DOORS ALARM (DRIVE PEDAL/ POWER DOOR ACTIVATED)

FUEL LEVEL SENDER (GAUGE)

•

HYDRAULIC OIL TANK PUMP INLET PRESSURE SWITCH (LIGHT)

'A' HYDRAULIC OIL FILTER BYPASS SENDER (LIGHT)

•

•

HORN (PUSH BUTTON ON L.H. JOYSTICK)

•

• •

FUEL TANK

•

'B'

• • •

•

OPERATOR'S CAB

BATTERY DISCONNECT SWITCH

ENGINE START RELAY

BATTERIES

•

•

ENGINE COOLANT LEVEL SENDER (LIGHT)

ENGINE SPEED SENSOR

ENGINE COOLANT TEMPERATURE SENDER (GAUGE)

•

•

• • • ENGINE OIL PRESSURE SWITCH (GAUGE)

VIEW 'A' POWER DOORS PUMP/MOTOR

853SM37

SWITCH AND SENSOR LOCATIONS (Serial No. 8530101 to 8530270) 6.8

ENGINE HOURS PRESSURE SWITCH (GAUGE)

VIEW 'B'

Tigercat 853E Feller Buncher

Electrical, gauges and alarms

HYDRAULIC OIL TEMPERATURE SENDER (GAUGE)

HYDRAULIC OIL LEVEL SIGHT GAUGE/SENDER (LIGHT )

FUEL LEVEL SENDER (GAUGE)

PUMP INLET PRESSURE SWITCH (LIGHT)

BACK-UP AND POWER DOORS ALARM (DRIVE PEDAL/ POWER DOOR ACTIVATED)

•

HYDRAULIC OIL TANK HYDRAULIC OIL FILTER BYPASS SENDER (LIGHT)

• HYDRAULIC OIL LEVEL SIGHT GAUGE/SENDER (BUZZER )

'A'

• •

HORN (PUSH BUTTON ON L.H. JOYSTICK)

• •

•

FUEL TANK

• 'B'

•

•

OPERATOR'S CAB

BATTERY DISCONNECT SWITCH

•

•

POWER DOOR SOLENOID

•

• •

BATTERIES

ENGINE SPEED SENSOR

ENGINE START RELAY

•

ENGINE COOLANT LEVEL SENDER (LIGHT)

ENGINE COOLANT TEMPERATURE SENDER (GAUGE)

• •

•

• VIEW 'B' ENGINE OIL PRESSURE SWITCH (GAUGE)

VIEW 'A' POWER DOORS PUMP/MOTOR 853SM42

SWITCH AND SENSOR LOCATIONS (Serial No. 8530371 to 8530399) 6.9

ENGINE HOURS PRESSURE SWITCH (GAUGE)

Tigercat 853E Feller Buncher

Electrical, gauges and alarms

HYDRAULIC OIL TEMPERATURE SENDER (GAUGE)

HYDRAULIC OIL LEVEL SIGHT GAUGE/SENDER (LIGHT )

FUEL LEVEL SENDER (GAUGE)

PUMP INLET PRESSURE SWITCH (LIGHT)

BACK-UP AND POWER DOORS ALARM (DRIVE PEDAL/ POWER DOOR ACTIVATED)

•

HYDRAULIC OIL TANK HYDRAULIC OIL FILTER BYPASS SENDER (LIGHT)

• HYDRAULIC OIL LEVEL SIGHT GAUGE/SENDER (BUZZER )

'A'

• •

HORN (PUSH BUTTON ON L.H. JOYSTICK)

• •

•

FUEL TANK

• 'B'

• •

•

•

OPERATOR'S CAB

BATTERY DISCONNECT SWITCH

POWER DOOR SOLENOID

•

• •

BATTERIES

ENGINE START RELAY

ENGINE SPEED SENSOR

•

ENGINE COOLANT LEVEL SENDER (LIGHT)

ENGINE COOLANT TEMPERATURE SENDER (GAUGE)

• •

•

• VIEW 'B' ENGINE OIL PRESSURE SWITCH (GAUGE)

VIEW 'A' POWER DOORS PUMP/MOTOR 853SM51

SWITCH AND SENSOR LOCATIONS (Serial No. 8530400 and up) 6.10

ENGINE HOURS PRESSURE SWITCH (GAUGE)

Tigercat 853E Feller Buncher

SECTION 7 - ENGINE START AND STOP JUNE 96

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

Tigercat 853E 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.

853SM05

In order to operate the machine functions after starting the engine, the arm rest must be in the latched down position and the pilot resume 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 in the event that the function lock out relay malfunctions.

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 C to terminal B. 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 853E Feller Buncher

853SM06

853SM07

Engine start and stop

PILOT RESUME CIRCUIT (FIG 2)

OPERATING CONDITION CIRCUIT (FIG 3)

SAW SWITCH 'ON' AT START UP CIRCUIT (FIG 4) 853SM08

7.3

Tigercat 853E Feller Buncher

Engine start and stop

7.4

Tigercat 853E Feller Buncher

SECTION 9 - ENGINE ANTI-STALL DECEMBER 2000

CONTENTS - SECTION 9 CIRCUIT SCHEMATIC ............................................................ 9.3 CONTROL MODULE IN CAB ................................................. 9.2 ENGINE ANTI-STALL CURVE ................................................ 9.4 FAULT FINDING ..................................................................... 9.4 FAULT FINDING PROCEDURES, ADDITIONAL ................... 9.5 HORSEPOWER LIMITING CONTROL ........................... 9.2, 9.4 GENERAL DESCRIPTION .............. 9.2. See also SECTION 4 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 853E 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.

A Linde system is used and incorporates the following components:

•• ••

••

LOAD SENSE PRESS. PORT TANK PORT

••

HPR REGULATOR VALVE 853-MP-3

MAIN PUMP

SOLENOID VALVE ON MAIN PUMP

• A wiring harness.

• A speed sensor mounted on the front of the engine above the timing gears,

CONTROL MODULE IN CAB

SPEED SENSOR

•

HPCON-01

•• ••

••

SOLENOID VALVE WIRING HARNESS

PILOT PRESS.PORT

• A solenoid valve mounted on the HPR pump, and

• A control module mounted on the rear wall of the cab interior,

HPCON-03

••

SPEED SENSOR ON FRONT OF ENGINE

9.2

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.

Tigercat 853E Feller Buncher

Engine anti-stall

25 PIN CONNECTOR The control module in the cab receives and distributes signals through a 25 pin connector which is attached to the wiring harness.

Refer to schematic diagram at end of this section; The pins on the 25 pin connector are connected as follows: • Pin 1 is connected to the anti-stall switch in the instrument panel.

• Pin 13 is connected to ground.

• Pin 6 is jumpered to Pin 17.

engine speed and any drop in RPM from 2200 will result in a signal being sent to the main pump solenoid via wires 11 and 16 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.

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

• Pin 18 is jumpered to Pin 20.

• Pin 14 is connected to the speed sensor on the timing gear housing.

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

The sytem control module constantly monitors the

853SM-04

HORSEPOWER LIMITING CONTROL CIRCUIT

9.3

Tigercat 853E Feller Buncher

Engine anti-stall

FAULT FINDING

B. ANTI-STALL OFF 1. Connect a 0-1000 psi gauge to the ‘X1’ test port on the main pump regulator.

ANTI - STALL QUICK CHECK 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.

NOTE: There is usually no adapter between the test port fitting and the regulator valve. If an adapter is used, remove it and confirm the adapter is a 'through hole' type. If the adapter is a 'check valve' fitting, discard the adapter and replace it with a 'through hole' style.

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

2. Start the engine.

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

The problem is likely hydraulic related. This also includes the anti-stall (VD3) solenoid valve on the main pump.

Expected Results:

Occurs only with the system ON. The problem is either related to the hydraulic system, the engine, or the anti-stall system.

•

All functions should operate normally.

•

X1 pressure should be less than 20 psi.

C. ANTI-STALL ON, THROTTLE MINIMUM 1. Connect a 0-1000 psi gauge to the ‘X1’ test port on the main pump regulator.

2. Start engine and place throttle in minimum position.

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

4. Fully activate MAIN BOOM UP function.

Expected Results:

* THE VALUE MAY VARY BY AS MUCH AS ±20 PSI FROM ONE MACHINE TO THE OTHER

RPM 1162 1592 1862 1892 1975 2062 2130 2162 2174 2188 2210 2394

•

Boom up function should be inactive (boom will not lift)

•

X1 pressure should be greater than 320 psi.

MACHINE 853

X1* (PSI) 330 330 330 330 330 330 330 230 140 40 6 0

350

300

250

"X1" (psi)

•

4. Activate each function one at a time.

200

Hors epower Lim iting Controller

150

100

50

0 1700

1800

1900

2000

2100

2200

2300

RPM

PRESSURE INCREASES FROM 0 - 360 PSI (APPROX.) WITHIN A RANGE OF APPROX. 50 RPM. ANTST.XLS

ENGINE ANTI-STALL CURVE ~ ENGINE RPM VS. PSI

9.4

2400

Tigercat 853E Feller Buncher

Engine anti-stall

D. ANTI-STALL ON, THROTTLE MAXIMUM 1. Connect a 0-1000 psi gauge to the ‘X1’ test port on the main pump regulator.

2. Start engine and place throttle in maximum position.

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

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 additional diagnosis is required.

A. ENGINE FULL SPEED 1. Place reflector on engine crank shaft pulley for phototach.

4. Fully activate MAIN BOOM UP function.

Expected Results: •

Boom up function should operate normally.

2. Start engine and place throttle in maximum position.

•

X1 pressure should be less than 20 psi.

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

E. BEGIN OF MOVEMENT 1. Start engine and place throttle in minimum 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.

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.

Refer to the appropriate sections in THIS MANUAL for THESE PROCEDURES. 1. Place reflector on engine crank shaft pulley.

Expected Results: •

The boom should not move initially.

•

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

`

B. ENGINE POWER NOTE: Before performing this procedure make sure that all relevant PRESSURES and SPEEDS have been set correctly. I.E. : SWING SPEED AND SWING PRESSURE SETTINGS; MAIN SYSTEM PRESSURE; CLAMP VALVE MAIN RELIEF.

2. Start engine and place throttle in maximum position 3. Place anti-stall switch in the OFF position.

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

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.

9.5

Tigercat 853E Feller Buncher

Engine anti-stall

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

H. SPEED SENSOR OUTPUT 1. Remove 25 pin connector from anti-stall control module.

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

2. Start engine and place throttle in maximum position.

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

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

• Speed sensor output should be >5VAC.

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

The speed sensor is non adjustable on the John Deere 6076 and 6081 engine.

Sensor is to be screwed in fully until it bottoms out.

E. ELECTRICAL POWER TO ANTI-STALL CONTROL MODULE. 1. Remove 25 pin connector from anti-stall control module.

I.

2. Start the engine.

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

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

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

SPEED SENSOR WIRES 1. Remove 25 pin connector from anti-stall control module.

960 ±150 ohms...Tigercat 845, 845B Cummins 'C' engine.

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

SOLENOID VALVE WIRES. 1. Ensure the anti-stall switch in cab is ON. 2. Remove 25 pin connector from anti-stall control module.

3. Check for shorts from pin 14 to chassis.

(Pin 12 or 13 is connected to ground)

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

• The resistance should be 6.6 ±2 ohms

J. SPEED SENSOR COIL 1. Remove 25 pin connector from anti-stall control module.

4. Check for shorts to chassis.

2. Measure resistance of speed sensor coil.

• The resistance should be:

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

960 ±150 ohms...Tigercat 845, 845B Cummins 'C' engine.

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

2. Measure resistance of solenoid coil.

• The resistance should be 6.6 ±2 ohms.

9.6

Tigercat 853E Feller Buncher

SECTION 11 - TRACK DRIVE DECEMBER 2000

CONTENTS - SECTION 11 BRAKE DESCRIPTION .......................................................... 11.8 CIRCUIT SCHEMATIC ........................................................... 11.5 MAIN CONTOL VALVE .......................................................... 11.3 PRESSURE SETTINGS ......................................................... 11.3 DRIVE MOTOR CROSSLINE RELIEF ................................ 11.3 DRIVE MOTOR PRESSURE OVERRIDE (P.O.R.) ............ 11.4 SET MOTOR MINIMUM DISPLACEMENT ............................ 11.6 TRACK COMPONENTS BOTTOM ROLLER RETAINING BOLTS ............................ 11.11 MEASURING TRACK SAG ................................................. 11.9 OPERATING THE MACHINE ............................................. 11.9 TORQUING UNDERCARRIAGE BOLTS ............................ 11.10 TRACK SHOE RETAINING BOLTS .................................... 11.10 WEAR LIMITS BOTTOM ROLLER WEAR .............................................. 11.12 BUSHING WEAR, OUTSIDE DIAMETER ....................... 11.12 IDLER WEAR .................................................................. 11.13 PIN AND BUSHING WEAR ............................................. 11.12 TRACK LINK WEAR ....................................................... 11.11 TRACK SHOE GROUSER HEIGHT WEAR .................... 11.11 TRACK SLIDE WEAR ..................................................... 11.13 TRACK HYDRAULICS TRACK DRIVE HYDRAULICS DESC. ................................ 11.2 TRACK DRIVE MOTOR ..................................................... 11.6 TRACK SPEED ADJUSTMENT .......................................... 11.6 SET STRAIGHT TRAVEL ............................................... 11.8 SET TRACK SPEED ....................................................... 11.6

Tigercat 853E Feller Buncher

Track drive

TRACK DRIVE HYDRAULICS DESCRIPTION

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 pressure builds up in the motor pistons.

The tracks on this machine are independently controlled by foot pedal proportional pilot valves which control the spools in the main spool valve. The main 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 variabledisplacement, bent-axis piston motor through a triple reduction planetary gearbox on each track frame.

The motor cannot move until the work line 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.

To control the vehicle movement in situations where the vehicle may roll down a grade, each motor is equipped with a counterbalance valve.

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., although pressures in the range of 300 to 700 psi are acceptable. Check valves are in the circuit to prevent pressure trapped in the motor from being applied to the pilots of the counterbalance spool and to force this return flow from the motors through the 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.

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.

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

The valve will remain in the closed position as long as there is no pressure in the work line from the main

Continued on page 3

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

TRACK DRIVE MOTOR

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

•

••

•• •• ••

• TRACK DRIVE GEARBOX

114-26

COUNTER BALANCE VALVE

•

GEARBOX BRAKE LINE

CROSSLINE RELIEF VALVE (FORWARD) • 17mm WRENCH • 5mm ALLEN KEY

TRACK DRIVE MOTOR (L.H. SIDE SHOWN) 11.2

LOW/DRIVE CONTROL LINE

'M' GAUGE TEST PORT

Tigercat 853E Feller Buncher

Track drive

Continued from page 2

JIC plug. Cap port adapter on gearbox.

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.

3. If not supplied with machine, Install a pressure gauge adapter in motor 'G' port (M12).

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

For travel modes the switch can be put in the “DRIVE” mode and the motor will vary it's displacement, However, the motor will automatically destroke in the event that a high load is encountered, e.g. a short grade or obstacle.

NOTE: For R.H. Track motor; FORWARD relief is at the BOTTOM and REVERSE relief is at the TOP.

The motor displacement is controlled by the pressure override control which maintains the pressure in the motor at 3100 psi. If the load demands pressures over 3100 psi, the motor will shift to a greater displacement. If the pressure drops, the motor will shift to a lower displacement.

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.

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.

6. For machines bearing serial numbers 8530101 to 8530220, start engine, turn ‘CREEP’ switch ON. For machines bearing serial numbers 8530221 and up, start engine, turn ‘DRIVE’ switch to LOW.

DRIVE SYSTEM PRESSURE SETTINGS:

7. 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.

DRIVE MOTOR CROSSLINE RELIEF SETUP PROCEDURE: NOTE: Ensure hydraulic oil temp. is 120°F Place felling head securely on ground before performing any service work. Ensure engine enclosure roof is open and safety strut in place.

8. With an assistant depressing a DRIVE pedal, (forward or reverse) Adjust L.S. pressure relief valve on Linde main valve manifold until 4600 PSI registers on pressure gauge at the 'P' port.

Tighten locknut on adjusting screw.

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

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.

PAB18

MAIN CONTROL VALVE 11.3

LINDE MAIN VALVE MANIFOLD

Tigercat 853E Feller Buncher

Track drive

Continued from page 3

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

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.

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.

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

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

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.

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

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

For machine serial numbers 8530221 and up, start engine, turn ‘DRIVE’ switch to LOW.

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

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

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

15. Move pressure gauge to 'G' port on other motor and repeat steps 10 - 14.

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

17. Reinstall brake lines and final drive inspection covers.

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

6. For machine serial numbers 8530101 to 8530220, start engine, turn ‘CREEP’ switch ON.

7. 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.

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

9. For machines bearing serial numbers 8530101 to 8530220, turn ‘CREEP’ switch OFF, and depress drive foot pedal.

For machines bearing serial numbers 8530221 and up, turn ‘DRIVE’ switch to DRIVE, and depress drive foot pedal.

10. 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.

11. 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’.

12. Move pressure gauges to 'G and 'M'' ports on other motor and repeat steps 4 - 11.

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

13. Reinstall brake line and final drive inspection cover.

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.

1. Remove final drive inspection cover(s).

11.4

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

15. Remove all gauges.

Tigercat 853E Feller Buncher

853SM09

Track drive

TRACK DRIVE CIRCUIT 11.5

Tigercat 853E Feller Buncher

Track drive

TRACK SPEED ADJUSTMENT PROCEDURE

Right motors should be set as close as possible to run at the same speed.

NOTE: Track speed is determined by:

SET TRACK SPEED

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

LOW SPEED SETTING: 1. For machine serial numbers 8530101 to 8530220, start engine, turn ‘CREEP’ switch ON.

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

For machine serial numbers 8530221 and up, start engine, turn ‘DRIVE’ switch to LOW. 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.

3. Place felling head on ground and by forcing down with boom controls, lift track clear of

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 the distance from the end of the screw to top of nut is a maximum of 0.62" (15.75mm). Both Left and

853SM25

Continued on page 7 MINIMUM DISPLACEMENT ADJUSTING SCREW - 6mm ALLEN KEY - 19mm WRENCH

'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 12mm ORB

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

•

• CROSSLINE RELIEF VALVES (2) AQ004-1A

TRACK DRIVE MOTOR 11.6

Tigercat 853E Feller Buncher

Track drive

Continued from page 6

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

ground.

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.

•

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

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.

SET TRACK SPEED

84-18

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.

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

FAST SPEED SETTING:

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

9. Set engine speed to above 1500 RPM 10. For machine serial numbers 8530101 to 8530220, turn ‘CREEP’ switch OFF.

NOTE: 13 R.P.M. equals 1 complete revolution of the track every 19 seconds.

For machine serial numbers 8530221 and up,

7. To obtain 13 R.P.M., adjust FORWARD spool stop adjusting screw on LEFT track main control R.H. TRACK SPEED ADJUSTING SCREW FORWARD

MAIN BOOM CYLINDERS

SWING MOTOR

STICK CYLINDER

Continued on page 8

HIGH PRESSURE LIMITING CONTROL

TILT CYLINDER

L.H. TRACK SPEED ADJUSTING SCREW REVERSE

•• •

•

••

•

•

••

•

•• 70-12-1

R.H. TRACK SPEED ADJUSTING SCREW REVERSE

MAIN CONTROL VALVE 11.7

L.H. TRACK SPEED ADJUSTING SCREW FORWARD

Tigercat 853E Feller Buncher

Track drive in REVERSE and making adjustments to REVERSE spool stop adjusting screws.

Continued from page 7

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

FAST SPEED: 5. For machine serial numbers 8530101 to 8530220, turn ‘CREEP’ switch OFF.

NOTE: 28 R.P.M. equals 1 complete revolution of the track every 9 seconds.

For machine serial numbers 8530221 and up, turn ‘DRIVE’ switch to DRIVE.

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

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

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

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

MOTOR HOUSING

•

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

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.

AQ004-1B

MIN. DISPLACEMENT ADJUSTING SCREW length.

BRAKE DESCRIPTION

13. With an assistant depressing LEFT TRACK drive pedal 'REVERSE', record track drive gearbox R.P.M. It should read 28 R.P.M. 14. Repeat steps 1. through 12. to set RIGHT TRACK. 15. Raise machine with boom controls, Remove blocks and lower track onto ground.

Refer to circuit diagram; Oil pressure from line 'A' or 'B' passes through shuttle valve 'C' and enters 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.

The brake is fully released at 250 psi and the maximum pressure the brake can stand without failure is 1000 psi.

SET STRAIGHT TRAVEL Ensure machine is on level ground.

The time required for the brake to release is approximately 1 second and 3 seconds to apply.

LOW SPEED: 1. For machine serial numbers 8530101 to 8530220, start engine, turn ‘CREEP’ switch ON. For machine serial numbers 8530221 and up, start engine, turn ‘DRIVE’ switch to LOW. 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.

4. Perform steps (2) & (3) depressing drive pedals

11.8

Tigercat 853E 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°

853ILL6

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.

UNDERSIDE OF TRACK GUARD

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

SAG DIMENSION

• •

UPPER SURFACE OF TRACK SHOE 853ILL8

MEASURING SAG DIMENSION

6. This dimension should be between 4" and 6" for normal operations.

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.

OPERATE MACHINE WITH FELLING HEAD OVER IDLERS

Continued on page 10

853ILL7

OPERATING THE MACHINE Whenever possible the machine should always be operated with the felling head over the IDLERS and not over the SPROCKETS. Operating over the sprockets will result in overloading of the contact surfaces between the sprocket and the track bushings. Bushings could crack during sprocket impact.

11.9

Tigercat 853E Feller Buncher

Track drive

Continued from page 9

TORQUING UNDERCARRIAGE BOLTS

IDLER ADJUSTING CYLINDER 4

•

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

CW001-2

When installing new components, all traces of paint and dirt must be removed from all mating surfaces including the contact area under the bolt head and nut.

• 1

Both the bolt and the nut should be lightly lubricated with SAE 30 oil and tightened using the Torque-turn method.

2

TRACK ADJUSTMENT

TRACK SAG ADJUSTMENT 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.

CAUTION: The grease is under very high pressure, DO NOT REMOVE the adjustment fitting valve body (1) from the idler adjusting cylinder (4).

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.

The torque-turn method involves torquing the bolt to an initial predetermined value, (not the value shown in the torque charts) plus an additional 1/3 turn. This ensures a more accurate and consistent torquing of the bolts, with less likelihood of the bolt/ nut coming loose later.

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.

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-turned method. If the shoe is not loose but a single bolt is low on torque, loosen the bolt and re torque-turn.

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.

TORQUE1

TRACK COMPONENT TORQUE VALUES Continued on page 11

11.10

Tigercat 853E 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.

WEAR LIMITS TRACK SHOE GROUSER HEIGHT WEAR

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

When checking the torque values at the first 100 hours and every 125 hours thereafter use the checking torque value.

SINGLE GROUSER BERC-9

Track shoe bolts ~ 3/4" UNC TORQUE-TURN ........... 220LBF/FT. + 1/3 TURN. CHECKING TORQUE ...................... 450 LBF/FT.

DOUBLE GROUSER BERC-10

BOTTOM ROLLER RETAINING BOLTS The bottom rollers must be fastened to the lower frame applying the exact torque values shown below using the Torque-turn method described in TORQUING UNDER CARRIAGE BOLTS earlier in this section..

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 checking torque value.

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.

TRIPLE GROUSER

BERC-1

GROUSER WEAR (Height) WEAR LIMITS Single Double Triple

New 75% wear 100% wear 2.82"(71.6mm) .... 1.37"(34.8mm) ... 0.93"(23.6mm) 1.37"(34.8mm) .. 0.71"(18mm) ........ 0.43"(10.9mm) 1.06"(26.9mm) .... 0.51"(12.9mm) ..... 0.36"(9.1mm)

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

TRACK LINK WEAR

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)

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)

Continued on page 12

11.11

Tigercat 853E Feller Buncher

Track drive

Continued from page 11

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

To take this measurement, 1.

Remove slack by placing a steel pin between sprocket and chain, then slowly move machine in reverse to tighten chain.

2.

Measure pitch across two four link sections, except section on each side of the master pin, to find average chain wear.

INTERNAL PIN & BUSHING WEAR

EXTERNAL BUSHING WEAR

BERC-5

NOTE: Bushing outside diameter is measured at three places because of the forward and reverse travel of the machine and a vertical wear that takes place.

WEAR LIMITS New bushing O.D. ........................ 2.62" (66.6mm) 75% worn ..................................... 2.5" (63.5mm) 100% worn ................................... 2.43" (61.7mm) NOTE: Allowable wear in rocky ground is 75% BOTTOM ROLLER WEAR

180°

BERC-4

MEASURING BUSHING WEAR

MEASURING TRACK PITCH

BERC-3

REVERSE SIDE WEAR

ROTATION

TURN PIN & BUSHING 180°

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

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.

4.

There is at least 0.008" (0.2mm) press fit available between pin and bushing and link.

WEAR LIMITS New length of four sections .............. 32" (813.0mm) 75% worn ......................................... 32.37"(822.2mm) 100% worn ....................................... 32.50"(825.5mm) NOTE: Allowable wear in rocky ground is 75%

BERC-6

MEASURING BTM. ROLLER WEAR

If accessibility to the rollers is impaired by guards, then concentrate on the front and rear rollers, these these will be the most worrn.

WEAR LIMITS New roller. ................................... 8.26" (210.0mm) 75% worn .................................... 7.64" (194.0mm) 100% worn .................................. 7.36" (187.0mm)

Continued on page 13

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.

11.12

Tigercat 853E Feller Buncher

Track drive

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.

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'

'A'

MEASURING IDLER WEAR BERC-7 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

1/8"

SECTION A - A

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.

845-33A

SUGGESTED MEASURING GAUGE Since the checking area is not immediately visible, checking this measurment may be done using a "go/no go" gauge made from a piece of flat bar 1/8" in thickness.

11.13

Tigercat 853E Feller Buncher

Track drive

11.14

Tigercat 853E Feller Buncher

SECTION 12 - BOOM FUNCTIONS APRIL 97

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

Tigercat 853E Feller Buncher

Boom functions

BOOM SYSTEM DESCRIPTION Two identical cylinders are used to raise and lower the main boom.

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

These cylinders receive oil from the main pump via three spool sections on the main hydraulic valve.

Two Joystick handles in the cab control the movement of each cylinder by directing pilot oil to the pilot end caps on each end of the appropriate spool sections to shift the spool and move the cylinder(s).

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 pressure surges that cannot be absorbed by the L.S. relief and system relief in the high pressure limiting control valve on the main control valve manifold.

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 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 cylinder and pump pressure to drop off to zero.

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. LOAD SENSING\ENGINE ANTI-STALL The boom hydraulics along with the swing and track drive circuits are all under the control of the load sensing system incorporated into the main hydraulic circuit.

12.2

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. 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.

Tigercat 853E Feller Buncher

Boom functions

BOOM HYDRAULIC CIRCUIT 853SM34

(Serial No. 8530101 to 8530392; 8530394 to 8530399) 12.3

Tigercat 853E Feller Buncher

Boom functions

BOOM HYDRAULIC CIRCUIT 853SM54

(Serial No. 8530393; 8530400 and up) 12.4

Tigercat 853E Feller Buncher

Boom functions

SET MAIN BOOM, STICK AND TILT PORT RELIEF VALVES

5. 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.

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.

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.

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

1. With hydraulic oil at operating temperature,

LINDE MAIN VALVE MANIFOLD

'P' GAUGE TEST CONN.

•

PORT RELIEF VALVE

•

ADJUSTING SCREW • 5mm ALLEN KEY

•

••

••

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

MAIN VALVE BODY

••

LOCKNUT • 17mm WRENCH

•

L.S. GAUGE TEST CONN. PAB18

MAIN VALVE MANIFOLD

•

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

MAIN VALVE PORT RELIEF VALVE

90744-3

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

PILOT END CAP

6. 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.

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

Continued on page 6 5 MAIN BOOM 'UP' PORT RELIEF

HIGH PRESSURE LIMITING CONTROL

STICK 'OUT' PORT RELIEF

FLOW ADJUSTING SCREW FOR PORT 'B' (TYPICAL)

TILT 'FORWARD' PORT RELIEF

CONTROL VALVE MANIFOLD

•

•

•

•

••

A

A

A

A

A

A

B

B

B

B

B

B

•

••• MAIN BOOM 'DOWN' PORT RELIEF 123-2-1

••

FLOW ADJUSTING SCREW FOR PORT 'A' (TYPICAL)

• TILT 'BACK' PORT RELIEF

STICK 'IN' PORT RELIEF

MAIN CONTROL VALVE 12.5

Tigercat 853E Feller Buncher

Boom functions

Continued from page 5

7. Slowly raise setting (clockwise) until hissing noise stops.

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 4600 PSI as the hissing sound begins to subside.

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.

1. Hydraulic oil must be at operating temperature.

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

2. Start engine and place engine throttle control in FULL position.

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

3. Fully retract cylinders.

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.

11. Slowly raise setting (clockwise) until hissing noise stops.

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 4600 PSI as the hissing sound begins to subside.

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

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

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.

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

12.6

MAIN BOOM CYLINDERS;

4. Place MAIN BOOM joystick lever in 'FULL UP' position and fully extend cylinders. Record cycle time.

5. Place MAIN BOOM joystick lever in 'FULL DOWN' position and fully retract cylinders.

Record cycle time.

STICK BOOM CYLINDER; 6. Repeat steps (4) and (5) using STICK BOOM joystick lever.

TILT BOOM CYLINDER; 7. Before the TILT cylinder cycle times can be recorded, the rod end flow control adjusting screw must first be set.

See TILT CYLINDER (ROD END) ADJUSTMENT in THIS SECTION. Repeat steps (4) and (5) using TILT BOOM joystick lever.

Continued on page 7

Tigercat 853E Feller Buncher

Boom functions

Continued from page 6

1. With hydraulic oil at operating temperature.

TYPICAL CYLINDER CYCLE TIMES 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.

CYLINDER CYCLE TIMES CYLINDER

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.

CYL. CYCLE TIMES

MAIN BOOM - 'UP' .............. 5.5 SEC. FULL EXTN. MAIN BOOM - 'DOWN' ....... 6.0 SEC. FULL RET.

••

STICK BOOM - 'IN' ............. 4.8 SEC. FULL RET. STICK BOOM - 'OUT' ......... 4.6 SEC. FULL EXTN.

•

TILT BOOM - 'FORWARD' .. 5.6 SEC. FULL EXTN. TILT BOOM - 'BACK' .......... 5.0 SEC. FULL RET.

L.S. GAUGE TEST CONN.

8. To adjust cycle times; 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.

NOTE: To adjust the flow rate at 'A' ports adjust spool travel stop adjusting screw at the bottom of the valve and vice-versa for flows at 'B' ports.

TILT CYLINDER (ROD END) FLOW ADJUSTMENT This adjusting screw regulates the flow of oil leaving the rod end of the TILT cylinder when tilting FORWARD.

PAB18

MAIN VALVE MANIFOLD

3. Start engine and place throttle control at approx.

1800 rpm.

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

5. Loosen locknut on flow adjustment screw. While holding joystick in the fully TILT FORWARD position, observe pressure gauge. If pressure reading exceeds 300-600 psi as the felling head is tilting forward (past the vertical position), turn adjusting screw counter-clockwise. If pressure reading is zero, while felling head is tilting FORWARD, turn adjusting screw clockwise to increase restriction.

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

UNDERSIDE OF LINDE MAIN VALVE MANIFOLD

7. Check the pressures again after tightening the locknut.

• •• 120-15A

•

8. Stop engine and remove gauge.

FLOW ADJUSTMENT SCREW

TILT CYL. FLOW ADJUSTING SCREW

When correctly set, this restriction will prevent cylinder damage due to cavitation and pump pressure from dropping to zero pressure.

12.7

Tigercat 853E Feller Buncher

Boom functions

12.8

Tigercat 853E Feller Buncher

SECTION 15 - SWING APRIL 97

CONTENTS - SECTION 15 ADJUST OIL FLOW TO SWING MOTOR (SWING SPEED) ................................ 15.4 CIRCUIT SCHEMATIC ....................................................................... 15.5, 15.6, 15.7 DISASSEBLY AND ASSEMBLY OF SWING MOTOR .......................................... 15.8 SET CROSSLINE RELIEF VALVES ..................................................................... 15.4 SWING BRAKE ..................................................................................................... 15.2 SWING DRIVE ...................................................................................................... 15.2 SWING HYDRAULICS ....................................................................................... 15.2 SWING MOTOR ANTI-VOID SYSTEM .......................................................... 15.3

Tigercat 853E Feller Buncher CROSSLINE RELIEF VALVE HOUSING

•

•

Swing

CROSSLINE RELIEF VALVES

MOTOR

CROSSLINE RELIEF VALVES

• R.H ROTATION

MOTOR

••

• •

• •

L.H. ROTATION

••

SWING BRAKE

•

ANTI-VOID VALVES SWING BRAKE

••

GEARBOX

•• GEARBOX

••

• 111-6

70-14

SWING DRIVE GEARBOX (Serial No. 8530238 and up)

regulates the flow through the gearbox to approx. 1 GPM. Oil is returned to tank via flushing port 'T'.

SWING DRIVE GEARBOX (Serial No. 8530101 to 8530237)

The clamps and wrist valve has two other tank ports that return the bulk of the oil in this clamps circuit back to tank.

SWING DRIVE SWING HYDRAULICS, LATER MACHINES

Two check valves (1 PSI) at the tank connections of these two return lines create a back pressure of approx. 50 psi. This back pressure regulates the 1 GPM of hydraulic oil flow through the gearbox to ensure a constant oil level and cooling action.

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. (A bent axis piston motor was used on earlier machines). The crossline relief valves provide a cushion to the high forces that occur during start and stop of the boom swing.

BRAKE FLUSHING STEEL RELEASE TANK DISC PORT 'T' PORT 'Y' FRICTION DISC

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 released 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 electric power is lost to the solenoid valve or hydraulic pressure to the pilot valve is lost, the swing brake will engage automatically.

• •

• •

FLUSHING PORT 'U'

• • BRAKE RELEASE PORT 'Z'

BK005-3

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

CROSS SECTION OF SWING BRAKE

Tigercat 853E Feller Buncher GEARBOX FLUSHING OIL SUPPLY FROM OIL COOLER INLET TANK

Swing

BRAKE RELEASE PILOT

Serial No. 8530101 to 8530237 The swing motor anti-void check valves prevent cavitation of the swing motor while the motor is decelerating. During deceleration, the controlled flow through the valve decreases.

SWING BRAKE

However, the motor does not slow down immediately, as a result, make-up oil is required to prevent cavitation.

CROSSLINE RELIEF VALVES

As with the gearbox flushing circuit, this system uses the back pressure created by check valves (oil cooler on earlier machines) to "supercharge" the tank side of the anti-void check valves. This ensures proper filling of the motor's suction side and prevents cavitation damage.

ANTI-VOID CHECK VALVES

853SM-10

SWING MOTOR ANTI-VOID SYSTEM

ANTI-VOID SUPERCHARGE SUPPLY FROM OIL COOLER INLET SWING DRIVE MOTOR SCHEMATIC (Serial No. 8530101 to 8530237)

SWING BRAKE

•

••

GEARBOX FLUSHING OIL SUPPLY FROM CLAMPS AND WRIST VALVE

•

•

ANTI-VOID CHECK VALVE

CROSS LINE RELIEF VALVES

PRESSURE LINES FROM MAIN CONTROL VALVE 845-16

CROSSLINE RELIEF VALVE

CROSSLINE RELIEF VALVE

BRAKE RELEASE PILOT

ANTI-VOID CHECK VALVE

70-10

CROSSLINE RELIEF/ANTI-VOID VALVES (Serial No. 8530101 to 8530237)

SWING DRIVE MOTOR SCHEMATIC (Serial No. 8530238 and up) SWING SPEED ADJUSTING SCREW RIGHT

HIGH PRESSURE LIMITING CONTROL

CONTROL VALVE MANIFOLD

•

••

••

• 123-2-1

SWING SPEED ADJUSTING SCREW LEFT

MAIN CONTROL VALVE

15.3

Tigercat 853E Feller Buncher

Swing

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.

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

6.Stop engine, remove gauge and reinstall plug.

LINDE MAIN VALVE MANIFOLD

ADJUST OIL FLOW TO SWING MOTOR (SWING MOTOR SPEED)

'P' GAUGE TEST CONN.

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.

L.S. GAUGE TEST CONN.

2.Start engine and place engine throttle control in FULL position.

MAIN VALVE MANIFOLD

PAB18

2.Start engine and place throttle control in FULL.

3.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.

3.Turn anti-stall switch OFF and the swing brake ON. 4.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 reads 3300 psi (3600 psi if gauge is in 'P' port) for each direction.

CROSSLINE RELIEF VALVE

CROSSLINE RELIEF VALVE

4.Repeat step (4) with L.H. joystick lever in 'FULL RIGHT' position.

The recommended factory setting is between 6 and 7 RPM. It should be noted that over adjusting to provide a faster swing speed could increase the stress on boom components and increase the heat load in the hydraulic system.

•

•• •

• • •

ADJUSTING SCREW

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

•

ADJUSTING SCREW MAIN VALVE BODY CROSSLINE RELIEF (Serial No. 8530101 to 8530237)

70-10

ANTICAVITATION VALVE

90919-1

•

PILOT END CAP MAIN VALVE SPOOL TRAVEL STOP

5.To adjust swing speed; CROSSLINE RELIEF VALVES

(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 recheck times.

R.H. ROTATION

••

•••

ADJUSTING SCREWS 111-6

L.H. ROTATION

• •• CROSSLINE RELIEF (Serial No. 8530238 and up)

15.4

Tigercat 853E Feller Buncher

853SM35

Swing

SWING DRIVE CIRCUIT (Serial No. 8530101 to 8530237) 15.5

Tigercat 853E Feller Buncher

853SM43

Swing

SWING DRIVE CIRCUIT (Serial No. 8530238 to 8530392; 8530394 to 8530399) 15.6

Tigercat 853E Feller Buncher

853SM52

Swing

SWING DRIVE CURCUIT (Serial No. 8530393 and 8530400 and up) 15.7

Tigercat 853E Feller Buncher

SWING BRAKE ASSY.

SPACER

BRAKE HOUSING

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

Swing •

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)

•

CROSS SECTION OF SWING BRAKE

• •

SPACER PT. NO. 92084 OUTER SPLINES FOR BRAKE DISCS

BOTTOM GEAR TEETH

SWING PINION

•

• BK010-2

•

BK005-4

SWING DRIVE ASSEMBLY

EARLIER STYLE SUN GEAR

DISASSEMBLY AND ASSEMBLY OF SWING MOTOR FROM GEARBOX When the swing drive motor is removed from the swing drive gearbox for inspection or repair, there is a possibility that the sun gear may not mesh properly with the first stage planetary gears when it is reinstalled.

This will cause premature failure of the swing drive gearbox.

LATER STYLE SUN GEAR

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

PROCEDURE: The following procedure should be used.

1.Remove the swing drive motor from the swing drive gearbox.

SPACER

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.

SUN GEAR

• 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.

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.

Spacers are not required for bent axis motor installations.

15.8

AQ009-2

BRAKE HOUSING WITH MOTOR REMOVED

2.Make alignments mark on the sun gear and brake housing to facilitate reassembly of the sun gear back into the swing drive gearbox.

These alignment marks should guarantee that both the brake disc and the first stage planetary

Tigercat 853E Feller Buncher

Swing

gear teeth will be in alignment with the sun gear splines and bottom gear teeth, provided nothing has moved.

3.Remove the sun gear from the swing drive gearbox and inspect the gear teeth at the bottom of the sun gear for abnormal damage or wear.

If there is no visible damage to the gear teeth, proceed to step (6). If there is visible damage to the sun gear, it must be replaced, proceed to step (4).

4.If the sun gear in step (3) has visible signs of damage, then the first stage planetary gears must also be inspected. Remove the brake assembly and inspect the first stage planetary gears for visible damage. If there is no visible damage, proceed to step (5). If there is visible damage to the first stage planetary gears, then the entire swing drive gearbox should be replaced.

5.Assuming that there is no visible damage to the first stage planetary gears, reassemble the brake assembly back onto the swing drive gearbox and secure it by reusing the six M12x30mm hex head bolts. Torque each hex head bolt to 62 lbf/ft (84 Nm).

6.Reinstall the sun gear into the swing drive gearbox using the alignment marks made in step (2). Verify that the sun gear is properly and fully engaged into the swing drive gearbox, i.e.; That the outer splines 'O' RING

MOTOR

MOTOR MOUNTING SURFACE

SPACER SUN GEAR

• •

• •

15/16" ± 1/16"

•

1-5/16" ± 1/16"

'O' RING

•

BK005-5

VERIFY SUN GEAR IS FULLY INSTALLED

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”).

15.9

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 853E Feller Buncher

Swing

15.10

Tigercat 853E Feller Buncher

SECTION 17 - SAW DRIVE APRIL 97

CONTENTS - SECTION 17 FELLING HEAD, 20" SAW. SEE ORIGINAL MANUFACTURERS MANUAL PRESSURE SETTINGS Serial No. 8530101 to 8530270 ..................... 17.5 Serial No. 8530371 to 8530399 ..................... 17.14 Serial No. 8530400 and up............................ 17.19 SAW CIRCUIT DESCRIPTION Serial No. 8530101 to 8530270 ..................... 17.4 Serial No. 8530371 to 8530399 ..................... 17.12 Serial No. 8530400 and up............................ 17.17 SAW CIRCUIT SCHEMATIC Serial No. 8530101 to 8530270 ..................... 17.6 Serial No. 8530371 to 8530399 ..................... 17.13 Serial No. 8530400 and up............................ 17.21 SAW CONTROL VALVE Serial No. 8530101 to 8530270 ..................... 17.3 Serial No. 8530371 and up............................ 17.9 SAW PUMP Serial No. 8530101 to 8530270 ..................... 17.2 Serial No. 8530371 to 8530399 ..................... 17.8 Serial No. 8530400 and up............................ 17.16

Tigercat 853E Feller Buncher

Saw drive

SAW PUMP

WRIST AND CLAMPS SECTION (FIXED)

Serial No. 8530101 to 8530270* * NOTE: Some machines in this Serial No. range may have been updated to include a later design pump as shown on page 17.16.

Refer to PRODUCT SUPPORT BULLETIN NO. 853-056-CDN for a setup procedure.

STANDBY VALVE

LOAD SENSING COMPENSATOR

•

SAW SECTION (VARIABLE)

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.

P.O.R. VALVE

SAW AND CLAMPS PUMP SCHEMATIC (Serial No. 8530101 to 8530270*)

853SM01

MAIN PUMP CONTROL VALVE

MAIN PUMP (LINDE)

WRIST AND CLAMPS PUMP

SAW PUMP

•

•

• •

• SAW PUMP LOAD SENSING COMPENSATOR

PUMP ASSEMBLY ~ SIDE VIEW (Serial No. 8530101 to 8530270*)

PUMP-1

WRIST AND CLAMPS SECTION (FIXED VANE TYPE)

• •

• DRIVE SHAFT

STANDBY VALVE 500 PSI • P

• •

HOUSING SAW SECTION (VARIABLE DISPLACEMENT PISTON TYPE)

• AP012-3

LOAD SENSING COMPENSATOR

SAW AND CLAMPS PUMP CROSS SECTION AP012-1

P.O.R. VALVE 3600 PSI

(Serial No. 8530101 to 8530270*)

17.2

LOAD

LOAD SENSING COMPENSATOR

Tigercat 853E Feller Buncher

Saw drive

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 portion.

Serial No. 8530101 to 8530270* The saw control valve consists of an aluminum body into which are housed a solenoid operated control valve cartridge, a relief valve cartridge and a pilot operated check valve.

The saw valve controls the flow of oil from the saw pump to the saw motor.

OUT

(2) Transmits a pressure signal via the G1 port to the saw pump (VP port) causing it to provide flow to the saw motor.

For test purposes, a RED push button on the end of the solenoid valve can be used to operate the valve manually.

SAW CONTROL VALVE

TO SAW PUMP PRESS. COMP. VALVE PORT VP.

VALVE to open and allow system pressure via the 'OUT' port to reach the saw motor.

COMP

The RELIEF VALVE is adjusted by loosening the locknut and turning the adjusting screw clockwise to increase the pressure value and counter-clockwise to decrease the value. It must be set at least 400 psi higher than the P.O.R. setting on the pump.

If the relief valve setting is lower than the P.O.R.

SOL. VALVE

TEST PORT G1

The PILOT OPERATED RELIEF VALVE is included to protect the pump in case of failure of the P.O.R. valve on the pump. Oil is diverted to tank via the 'TANK' port.

GAUGE TEST PORT G1 - 04 JIC

DR

•

CHECK VALVE RELIEF VALVE

TEST PORT G2 IN

TEST PORT G1 VALVE BODY

•

SM-22

• •

SOLENOID CONTROL VALVE

T

•

•

RELIEF VALVE

•

DIN CONNECTOR

RELIEF ADJUSTMENT (4000 PSI) • 9/16" WRENCH • 5/32" ALLEN WRENCH

•

CHECK VALVE

•

SOLENOID MANUAL TEST BUTTON

ADJUSTING SCREW

•

••

•

25-16A-2

•

SOLENOID OPERATED CONTROL 11K VALVE • TEST PORT G2 SOLENOID SAW CONTROL VALVE TEST BUTTON (Serial No. 8530101 to 8530270*)

SAW CONTROL VALVE (Serial No. 8530101 to 8530270*)

GAUGE TEST PORT G2 - 04 JIC

setting, the pump will not destroke during load conditions (saw blade acceleration) and oil will be blown over the relief valve and generate heat.

OPERATING DESCRIPTION When the SOLENOID VALVE is de-energized (saw switch in OFF position), oil entering the 'IN' port is blocked by the CHECK VALVE preventing flow to the saw motor.

When the SOLENOID VALVE is energized, (saw switch ON) the spool in the control valve shifts and: (1) Allows system pressure to reach the back side of the PILOT OPERATED CHECK VALVE. This pressure, via internal porting, causes the CHECK 17.3

Two gauge test ports (G1) and (G2) are provided for attaching pressure gauges when checking pressures.

For a complete description of the circuit and pressure setting instructions, refer to PRESSURE SETTINGS: PUMP AND SAW CONTROL VALVE. ________________________________________

Tigercat 853E Feller Buncher

Saw drive

SAW CIRCUIT DESCRIPTION

When this occurs, the loss of load pressure at the G1 port of the saw valve is sensed by the saw pump compensator and the pump displacement is reduced to that required to maintain 300 psi (or below 500 psi) output pressure.

Serial No. 8530101 to 8530270* * NOTE: Some machines in this Serial No. range may have been updated to include a later design pump as shown on page 17.16.

Refer to PRODUCT SUPPORT BULLETIN NO. 853-056-CDN for a setup procedure.

The saw blade (typically 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 on the back of the main pump supplies oil flow to the motor via the saw control valve. The saw control valve is solenoid operated with a built in relief and controls the flow of hydraulic oil from the pump to the motor.

NOTE: A red SOLENOID MANUAL TEST BUTTON on the end of the solenoid valve can be used to shift the valve spool by hand for trouble shooting purposes.

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 valve solenoid.

IMPORTANT: To maximize saw motor life, do not shut the engine off until the saw blade has come to a complete stop.

With the saw switch in the OFF position, the saw valve solenoid is de-energized preventing oil flow to the motor.

This pressure is maintained by the STAND-BY valve mounted on the side of the pump.

When pressure builds up to 500 psi the spool in the STAND-BY valve shifts to direct oil to the control piston of the pump swashplate, moving it to the neutral position. In this condition the pump flow is reduced to a minimum.

With the saw switch in the ON position, the saw valve solenoid is energized directing the flow of oil to unseat a PILOT OPERATED CHECK VALVE in the saw valve. This allows high pressure oil to flow from the pump to the motor.

Return oil from the saw motor is directed back to tank via a 01 psi check valve mounted at the hydraulic tank connection.

High pressure oil is also directed from the saw valve G1 port back to the STAND-BY valve on the pump to prevent the STAND-BY spool from shifting. This will override the 500 psi setting and allow the saw pump to build up pressure.

When the pressure (system pressure) builds up to 3600 psi the spool in the pump P.O.R. 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 but maintain the pressure.

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.

GAUGE TEST PORT G2 • 06 ORB

The saw motor adjusts its displacement in response to system pressure, this is only true with variable displacement motors.

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

••

SAW CONTROL VALVE (BOTTOM) 25-3A

(Serial No. 8530101 to 8530270*)

17.4

Tigercat 853E Feller Buncher

Saw drive

PRESSURE SETTINGS:

9.

Serial No. 8530101 to 8530270* * NOTE: Some machines in this Serial No. range may have been updated to include a later design pump as shown on page 17.16.

Refer to PRODUCT SUPPORT BULLETIN NO. 853-056-CDN for a setup procedure.

**CAUTION: Before starting engine, ensure relief valve is unscrewed as stated in paragraph 9 otherwise damage could occur to the piston pump.

10.

PUMP AND SAW CONTROL VALVE 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.

Slacken jamnut and back out STANDBY adjusting screw on the pump compensator valve, Re-tighten jamnut to prevent screw from moving.

3.

Install 0 - 600 psi pressure gauge in port G2 of the saw control valve. The saw control valve is STANDBY VALVE 500 PSI P

P.O.R. VALVE 3600 PSI

LOAD

VALVE MOUNTED TO PUMP BODY

PUMP PRESSURE COMPENSATOR VALVE located in the engine compartment above the main valve bank.

4.

11.

Start engine and measure stand-by pressure with saw switch in the OFF position. Gauge should read 500 psi, if not, adjust STANDBY adjusting screw on the saw pump.

5.

Stop engine and remove the 0 - 600 psi pressure gauge from test port G2 and replace plug.

6.

Install a 0-5000 psi pressure gauge in the G1 test port of the saw control valve.

7.

On the pump COMPENSATOR valve; remove the acorn nut, slacken the jamnut and screw the P.O.R. valve adjusting screw all the way IN. CAUTION: Do not use excessive force; stop when resistance increases sharply.

8.

On saw control valve, slacken the locknut and screw relief valve adjusting screw OUT until spring pressure is relieved.

17.5

Set the saw control valve relief pressure to 4000 psi. by slowly screwing the relief valve adjusting screw in until the required pressure reading is obtained.

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

12.

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

13.

Set P.O.R. valve on pump to 3600 psi by slowly screwing the adjusting screw out until the required pressure reading is obtained.

14.

Re-tighten locknut, making sure adjusting screw does not turn and reinstall acorn nut.

15.

Remove all pressure gauges and reinstall all plugs and caps.

• •

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.

•

AP012-3

Start the engine** and put throttle control to the IDLE position. Ensure the hydraulic oil temperature is between 1000F and 1400F.

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

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

SET MOTOR MINIMUM DISPLACEMENT Refer to FELLING ATTACHMENT MANUFACTURER’S SERVICE LITERATURE for this information.

Tigercat 853E Feller Buncher

Saw drive

SAW CIRCUIT 853SM02

(Serial No. 8530101 to 8530270*) 17.6

Tigercat 853E Feller Buncher

Saw drive

17.7

Tigercat 853E Feller Buncher

Saw drive

SAW PUMP Serial No. 8530371 to 8530399*

WRIST AND CLAMPS SECTION (FIXED)

SAW SECTION (VARIABLE)

* NOTE: Some machines in this Serial No. range may have been updated to include a later design pump as shown in the saw drive section for Serial Nos. 8530400 and up. Refer to PRODUCT SUPPORT BULLETIN NO. 853-056-CDN for a setup procedure.

•

•

PRESSURE COMPENSATOR

•

A "double pump" is mounted on the back of the main pump and connected to the main pump with a through shaft.

The double pump consists of a variable displacement

SAW AND CLAMPS PUMP SCHEMATIC

853-45

(Serial No. 8530371 to 8530399*

MAIN PUMP CONTROL VALVE

MAIN PUMP (LINDE)

WRIST AND CLAMPS PUMP

SAW PUMP

• •

••

•

••

SAW PUMP PRESSURE COMPENSATOR

PUMP ASSEMBLY ~ SIDE VIEW (Serial No. 8530371 to 8530399*)

100-1-1

WRIST AND CLAMPS SECTION (FIXED VANE TYPE)

• •

• DRIVE SHAFT

•

HOUSING SAW SECTION (VARIABLE DISPLACEMENT PISTON TYPE)

AP028-2

P.O.R. VALVE ADJUSTING SCREW 3600 PSI

•

T

•

P

•

PRESSURE COMPENSATOR

SAW AND CLAMPS PUMP CROSS SECTION (Serial No. 8530371 to 8530399 to 8530399*) 17.8

AP028-3

PRESSURE COMPENSATOR

Tigercat 853E Feller Buncher

Saw drive

pump section for the saw drive and a fixed displacement pump section for the wrist and clamps.

••

SOLENOID

••

The saw pump is an axial-piston variable displacement pump controlled by a pressure compensator mounted directly onto the pump. The pressure compensator (or P.O.R.) controls the flow of oil to the pumps swashplate control piston. 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 PILOT VALVE

SAW CONTROL VALVES Serial No. 8530371 and up The saw circuit is controlled by a solenoid operated pilot valve and a pilot operated main control valve.

SAW PILOT VALVE This valve consists of a steel body into which is housed a solenoid operated control valve cartridge.

An electrical signal from the saw switch in the cab energizes the solenoid in the pilot valve to shift the spool in the cartridge and direct pilot oil to one end of the spool section of the main saw valve.

SOLENOID

• •

CONTROL VALVE CARTRIDGE

DIN CONNECTOR

•

VALVE BODY

•

SAW PILOT VALVE AT022

(Serial No. 8530371 and up)

17.9

SAW PILOT VALVE 100-F

(Serial No. 8530371 and up)

Tigercat 853E Feller Buncher

Saw drive

MAIN SAW VALVE

OPERATING DESCRIPTION

Serial No. 8530371 and up

Oil (system pressure) enters the end inlet section of the main control valve, passes through the saw spool section, through the tank passages of the wrist/clamp spool sections and then back to tank via the outlet section.

The main saw valve is part of the clamps and wrist valve. It consists of an open centre 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.

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.

The saw spool section has a self centering 3position spool which is open centre. A spring in the spool end cap holds the spool in the centre neutral position.

The spool is shifted by pilot pressure being applied to one end of the spool from the pilot valve. Shifting the spool directs oil from the saw pump to the saw motor.

MID INLET SECTION SAW SECTION OUTLET SECTION

SAW END INLET SECTION

RETURN TO TANK

GAUGE TEST PORT (FOR SAW)

• •• ••

••

SAW

CLAMPS

•

• •• WRIST

••

••

SAW RELIEF (4000PSI) - 1 " WRENCH

104-9-1

ACCUM.

•

GAUGE TEST PORT (FOR WRIST & CLAMPS)

MAIN (MID) RELIEF VALVE

POWER BEYOND PORT (TO SWING MOTOR)

SAW CONTROL VALVE (WITH WRIST AND CLAMPS) (Serial No. 8530371 and up) 17.10

Tigercat 853E Feller Buncher

Saw drive

The purpose of the relief valve installed in the saw inlet section of the main saw valve is to protect the pump should a pump P.O.R. failure occur.

The relief valve diverts oil to tank via the tank passages in the spool sections and the outlet section of the wrist/clamps valve. It also functions as an antcavitation relief valve.

For a detail description of the relief valves, refer to RELIEF VALVES in SECTION 18 of this manual.

17.11

Tigercat 853E Feller Buncher

Saw drive PARALLEL PASSAGE

A

PLUG

LOAD CHECK VALVE

WORK PORT BRIDGE

B PLUG

PILOT END CAP PILOT END CAP 90136-4

SPOOL CENTERING SPRING

SPOOL TANK PASSAGE

THRU' NEUTRAL PASSAGE

CROSS SECTION OF SAW SPOOL SECTION

SAW CIRCUIT DESCRIPTION Serial No. 8530371 to 8530399* 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.

NOTE: Saw will not operate with pilot system OFF. Saw will not function properly with LOW pilot pressure.

IMPORTANT: To maximize saw motor life, do not shut the engine off until the saw blade has come to a complete stop.

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.

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 main saw control valve. This will direct oil from the saw pump to the saw motor, causing system pressure to rise and start rotating the saw blade.

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.

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 back to tank through the outlet section of the wrist and clamps valve, through the oil cooler and into the tank.

If the return oil is restricted at the oil cooler due to cold (thicker) oil, then the return oil will bypass the cooler and be directed to the tank via a 60 psi check valve mounted at the hydraulic tank connection.

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

With the main saw control valve spool in this neutral PRESSURE 17.12

SETTINGS:

Tigercat 853E Feller Buncher

Saw drive

SAW CIRCUIT 853SM44

(Serial No. 8530371 to 8530399*)

17.13

Tigercat 853E Feller Buncher

Saw drive

PUMP AND SAW CONTROL VALVE

Stop when resistance increases sharply.

Serial No. 8530371 to 8530399* * NOTE: Some machines in this Serial No. range may have been updated to include a later design pump as shown in the saw drive section for Serial Nos. 8530400 and up. Refer to PRODUCT SUPPORT BULLETIN NO. 853-056-CDN for a setup procedure.

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

6. Start the engine** and put throttle control to the IDLE position. Ensure the hydraulic oil temperature is between 1000F and 1400F. **CAUTION: Before starting engine, ensure relief valve is unscrewed as stated in paragraph 5 otherwise damage could occur to the piston pump.

GAUGE TEST PORT (FOR SAW)

7. 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.

8. Set the saw control valve relief*** pressure to 4000 psi. by slowly screwing the relief valve adjusting nut in until the required pressure

••

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

••

reading is obtained. Tighten jam nut.

SAW RELIEF (4000PSI) - 1 " WRENCH

104-9-1

9. Set P.O.R. on pump compensator to 3600 psi by slowly screwing the adjusting screw out until the required pressure reading is obtained.

SAW CONTROL VALVE

1. Park machine on level ground, stop engine.

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

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

11. Remove pressure gauge and reinstall all plugs and caps.

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

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

4. On pump COMPENSATOR valve; Slacken jamnut and screw the adjusting screw all the way in. CAUTION: Do not use excessive force,

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

••

T

P

• AP028-3

PRESSURE COMPENSATOR

100-1-1

SAW PUMP WITH PRESSURE COMPENSATOR (Serial No. 8530371 to 8530399*) 17.14

Tigercat 853E Feller Buncher

Saw drive

SET MOTOR (BEGIN OF STROKE) IMPORTANT: The motor begin of stroke setting must be at least 400 PSI lower than the pump P.O.R. setting.

SET MOTOR MINIMUM DISPLACEMENT Refer to FELLING HEAD MANUFACTURERS MANUAL for this information.

17.15

Tigercat 853E Feller Buncher

Saw drive

SAW PUMP

SAW CONTROL VALVES

Serial No. 8530400 and up (Serial number note; When machines with serial number 8530101 to 8530270 are updated with the pump described here, follow the PRESSURE SETTING procedure shown in PRODUCT SUPPORT BULLETIN NO. 853-056-CDN and NOT the procedure shown here)

Refer to SAW CONTROL VALVES Serial No. 8530371 and up in THIS SECTION for description and operation.

The saw pump is an axial-piston variable displacement pump controlled by a pressure compensator. The pressure compensator is mounted directly onto the pump and has a STANDBY pressure adjustment and a P.O.R. adjustment. The STANDBY adjusting screw is screwed completely in and is NOT used for this application. The P.O.R. is adjusted to operate at 3600 psi. Until system pressure reaches 3600 psi, the compensator valve will be in the "return" position blocking oil flow to the swashplate control piston leaving the pump at maximum displacement.

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

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

SAW PUMP SCHEMATIC 853SM48

•

SAW PUMP (LINDE)

(Serial No. 8530400 and up)

SAW PUMP PRESSURE COMPENSATOR

WRIST AND CLAMPS PUMP (DENISON)

•

•

•

MAIN PUMP (LINDE)

PUMP ASSEMBLY 144-13A

(Serial No. 8530400 and up

17.16

Tigercat 853E 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. 8530400 and up)

not shut the engine off until the saw blade has come to a complete stop.

SAW CIRCUIT DESCRIPTION Serial No. 8530400 and up 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.

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 main saw control valve. This will direct oil from the saw pump to the saw motor, causing system pressure to rise and start rotating the saw blade.

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 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.

NOTE: Saw will not operate with pilot system OFF. Saw will not function properly with LOW pilot pressure.

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.

IMPORTANT: To maximize pump and motor life, do 17.17

Continued on page 18

Tigercat 853E Feller Buncher

Saw drive

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 back to tank through a return line with a 1 psi check valve installed at the tank connection.

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

17.18

Tigercat 853E Feller Buncher

Saw drive

PRESSURE SETTINGS:

6. Start the engine** and put throttle control to the IDLE position. Ensure the hydraulic oil temperature is between 100 deg. F and 140 deg. F.

PUMP AND SAW CONTROL VALVE Serial No. 8530400 and up 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.

Continued on page 20 GAUGE TEST PORT (FOR SAW)

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

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

• SAW RELIEF (4000 PSI) - 1 " WRENCH 104-9-1

SAW CONTROL VALVE STANDBY VALVE

P.O.R. VALVE (3600 PSI) PRESSURE COMPENSATOR VALVE

SAW PUMP (LINDE)

• •

• WRIST AND CLAMPS PUMP (DENISON)

• •

•

MAIN PUMP (LINDE)

SAW PUMP WITH PRESSURE COMPENSATOR 144-16A

(Serial No. 8530400 and up)

17.19

Tigercat 853E Feller Buncher

Saw drive

Continued from page 19

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

7. 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.

8. 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. setting to avoid generation of excessive heat.

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

10. Set P.O.R. valve on pump pressure compensator to 3600 PSI by slowly screwing the adjusting screw OUT until the required pressure reading is obtained.

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

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

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

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

SET MOTOR MINIMUM DISPLACEMENT Refer to FELLING ATTACHMENT MANUFACTURER’S SERVICE LITERATURE for this information.

17.20

Tigercat 853E Feller Buncher

Saw drive

SAW CIRCUIT 853SM47

(Serial No. 8530393; 8530400 and up) 17.21

Tigercat 853E Feller Buncher

Saw drive

17.22

Tigercat 853E Feller Buncher

SECTION 18 - TREE CLAMPS AND WRIST APRIL 97

CONTENTS - SECTION 18 ANTI-CAVITATION RELIEF VALVE ADJUSTING PROCEDURE ...................................................... 18.4 OPERATION ............................................................................. 18.3 CIRCUIT DESCRIPTION Serial No. 8530101 to 8530270 ................................................. 18.5 Serial No. 8530371 and up ...................................................... 18.10 CIRCUIT SCHEMATIC Serial No. 8530101 to 8530270 ................................................. 18.7 Serial No. 8530371 to 8530392; 8530394 to 8530399 ............ 18.13 Serial No. 8530393 to 8530400 and up ................................... 18.14 CLAMPS AND WRIST CONTROL VALVE Serial No. 8530101 to 8530270 ................................................. 18.2 Serial No. 8530371 and up ........................................................ 18.8 PRESSURE SETTINGS Serial No. 8530101 to 8530270 ................................................. 18.5 Serial No. 8530371 and up ...................................................... 18.10

Tigercat 853E Feller Buncher

Tree clamps and wrist

TREE CLAMP, ACCUMULATING ARMS AND WRIST CONTROL VALVE

GAUGE TEST PORT

PORT RELIEF VALVES

INLET SECTION

Serial No. 8530101 to 8530270 The valve consists of three open center spool sections and one inlet section. Each spool section is pilot operated. An outlet section directs return oil back to tank.

Oil enters the inlet section and is allowed to pass 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 centered. 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 fuctions.(or all at the same time if required but with reduced flow to each).

MAIN RELIEF VALVE

CONTROL VALVE 70-13

INLET SECTION

PORT RELIEF VALVES

To prevent over pressurizing of the operating circuits, each work port in the valve sections has a PORT RELIEF VALVE. A MAIN RELIEF VALVE is installed in the inlet section of the valve. It controls the three spool sections and is set lower than the PORT RELIEF VALVES.

RIGHT

B WRIST A

OPEN

B CLAMPS A CLOSE

CLOSE

B ACCUM. A OPEN

LEFT

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.

OUTLET SECTION

AT015

PARALLEL PASSAGE

(Serial No. 8530101 to 8530270)

MAIN RELIEF VALVE

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.

RELIEF VALVE PORT 'A'

OUTLET SECTION PORT RELIEF VALVES

LOAD CHECK VALVE

A

TREE CLAMP, ACCUMULATING ARMS AND WRIST CONTROL VALVE (Serial No. 8530101 to 8530270) 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 18.2

Tigercat 853E Feller Buncher

Tree clamps and wrist ANTI-CAVITATION RELIEF VALVE LATER DESIGN

VALVE POPPET

T P

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

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

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

Step 2.

T Step 3.

P

STEP 3

T VALVE POPPET

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.

T Step 4.

P

STEP 4

T T

VALVE POPPET

Step 5.

P

STEP 5

T CHECK POPPET

T P

ANTI-VOID CHECK OPERATION

As the seating poppet began to move away from the valve poppet, the valve poppet began to open under the effect of the pressure at P thus allowing a large volume of flow to tank. The drop in pressure behind the valve poppet when the seating poppet seats on the pilot poppet ensures full opening of the valve poppet.

T 18.3

When pressure ‘P’ drops the pilot poppet closes and then the seating poppet moves back to its original position and permits oil pressure to flow into the cavity behind the valve poppet. As the seating poppet moves back it comes in contact with the valve poppet and its spring force plus the oil pressure cause the valve poppet to move back to the closed position.

As an anti-void or check valve 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’.

Tigercat 853E Feller Buncher

Tree clamps and wrist

ANTI-CAVITATION RELIEF VALVE ADJUSTING PROCEDURE ADJUSTING NUT

•

JAMNUT, 1" WRENCH

•

1. Loosen jamnut 2. Turn adjusting nutµ 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. µIMPORTANT: 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. ________________________________________

18.4

Tigercat 853E Feller Buncher

Tree clamps and wrist

TREE CLAMPS AND WRIST Serial No. 8530101 to 8530270 CIRCUIT DESCRIPTION The upper and lower tree clamps are each operated by single cylinders operating independently of each other. The wrist is operated by a single double-acting cylinder. The cylinders receive oil from a fixed displacement pump via spool sections in the clamp and wrist control valve.

The wrist is operated by finger 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.

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.

For a description of the pump refer to SECTION 7 of this manual.

For a description of the tree clamps and wrist control valve refer to THIS SECTION and for the joystick refer to SECTION 4 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.

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.

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.

NOTE: For this type of main and port relief valve, Refer to RELIEF VALVE ADJUSTING PROCEDURE in THIS SECTION. 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 psi. pressure gauge to the clamp and wrist control valve test port. The control valve is located just behind the swing reducer and below the main valve.

3.

Turn the main relief adjusting nut all the way in.

MAIN RELIEF (2700 psi) - 1 " WRENCH

INLET SCTION

•

•

GAUGE TEST PORT 04 JIC

• WRIST 'RIGHT' PORT RELIEF (3200 psi)

•

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

B

WRIST

A

•

B

CLAMP

A

•

•

•

B

ACCUM

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

A

• •

WRIST 'LEFT' PORT RELIEF (3200 psi)

UPPER CLAMP ARMS 'CLOSE' PORT RELIEF (3200 psi) ACCUM. ARMS 'OPEN' PORT RELIEF (3200 psi) OUTLET SECTION

AT015

TREE CLAMP, ACCUMULATING ARMS AND WRIST CONTROL VALVE 18.5

Tigercat 853E Feller Buncher 4.

Tree clamps and wrist

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.

5.

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

6.

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.

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

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.

7.

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.

8.

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.

9.

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 clamps open port relief. Repeat above procedure until a gauge reading of 3200 psi is obtained.

10.

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

If less than 3200 psi., readjust port relief.

Repeat above procedure until a gauge reading of 3200 psi is obtained.

11.

With the boom raised, rotate the felling head fully to the other side. While holding the joystick 18.6

wrist finger switch depressed, check gauge pressure reading.

If less than 3200 psi., readjust port relief.

Repeat above procedure until a gauge reading of 3200 psi is obtained. Center the felling head and lower to the ground.

12.

With throttle control in the FULL position; Unscrew 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.

13.

Remove pressure gauge and reinstall plugs and caps.

_________________________________________

Tigercat 853E Feller Buncher

Tree clamps and wrist

TREE CLAMP, ACCUMULATING ARMS AND WRIST CIRCUIT 853SM 03

(Serial No. 8530101 to 8530270) 18.7

Tigercat 853E Feller Buncher

Tree clamps and wrist centered. 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 fuctions.(or all at the same time if required but with reduced flow to each).

TREE CLAMP, ACCUMULATING ARMS AND WRIST CONTROL VALVE Serial No. 8530371 and up The valve consists of three open center spool sections and one inlet sectioncombined with the open center spool section and inlet section of the Saw control valve. Each spool section is pilot operated. An outlet section directs return oil back to tank.

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 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

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

MID INLET SECTION SAW SECTION

OUTLET SECTION RETURN TO TANK

••

•

••

•

•• •

••

CLAMPS

• •• WRIST

ACCUM.

• •• •• GAUGE TEST PORT

MAIN (MID) RELIEF VALVE - 1 " WRENCH

•• PORT RELIEF VALVES

• POWER BEYOND PORT (TO SWING MOTOR)

WRIST AND CLAMPS CONTROL VALVE (WITH SAW SECTION) 104-9-1

(Serial No. 8530371 and up)

18.8

Tigercat 853E Feller Buncher RELIEF VALVE PORT 'A'

Tree clamps and wrist 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

A MAIN RELIEF VALVE is installed in the inlet section of the valve. It controls 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.

18.9

Tigercat 853E Feller Buncher

Tree clamps and wrist 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.

TREE CLAMPS AND WRIST Serial No. 8530371 and up CIRCUIT DESCRIPTION The upper and lower tree clamps are each operated by single cylinders operating independently of each other. The wrist is operated by a single double-acting cylinder. The cylinders receive oil from a fixed displacement pump via spool sections in the clamp and wrist control valve.

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

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.

The wrist is operated by finger buttons on the joystick handles. The right hand button rotates the felling head in the counter-clockwise direction and the left hand button rotates the head in the clockwise direction. The switches operate solenoid pilot valves which direct pilot oil to the wrist section of the control valve to shift the spool. The spool directs oil from the

WRIST 'LEFT' PORT RELIEF INLET SECTION (3200 psi @ IDLE)

UPPER CLAMP ARMS 'CLOSE' PORT RELIEF (3200 psii @ IDLE)

GAUGE TEST PORT 04 JIC

ACCUM. ARMS 'OPEN' PORT RELIEF (3200 psii @ IDLE)

GAUGE TEST PORT (FOR SAW) 04 JIC

•

•

•

OUTLET SECTION

CLOSE

OPEN

A

A

B

B

OPEN

CLOSE

•

•

LEFT

• A

• •

• SAW

B RIGHT

• •

WRIST 'RIGHT' PORT RELIEF (3200 psii @ IDLE)

MAIN RELIEF (2700 psii @ IDLE) - 1 " WRENCH

UPPER CLAMP ARMS 'OPEN' PORT RELIEF (3200 psii @ IDLE)

ACCUM. ARMS 'CLOSE' PORT RELIEF (3200 psii @ IDLE)

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

(Serial No. 8530371 and up)

18.10

Tigercat 853E Feller Buncher

Tree clamps and wrist

pump to either end of the cylinder and from the cylinder back to tank.

5.

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

Return oil from these spool sections is directed back to tank via the outlet section.

6.

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.

Two "out" ports and a "power beyond" port direct oil back to the tank; On machine serial No. 8530371 to 8530392,8530394 to 8530399, One "out" port directs the oil back to tank through a 60 psi check valve at the tank connection and the other "out" port directs oil back to tank via the oil cooler.

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

On machine serial No. 8530393, 8530400 and up, both "out" ports direct oil back to tank through 1 psi check valves at the tank connections. The oil cooler is plumbed into the main Linde valve return lines.

The return flow through the 1 psi check valves (and the 60 psi check on earlier machines) at the tank connections, creates enough back pressure in the lines to direct oil through the "power beyond" port of the outlet section of the valve to lubricate and cool the swing drive gearbox, from there it is returned to the tank.

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

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.

7.

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

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.

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.

NOTE: For this type of main and port relief valve, Refer to RELIEF VALVE ADJUSTING PROCEDURE in THIS SECTION. 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 psi. 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.

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.

18.11

While holding the joystick thumb switch in the ACCUMULATING ARMS OPEN position (fully retracted), check gauge pressure reading.

8.

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.

9.

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 clamps open port relief. Repeat above procedure until a gauge reading of 3200 psi is obtained.

10.

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

If less than 3200 psi., readjust port relief.

Repeat above procedure until a gauge reading of 3200 psi is obtained.

11.

With the boom raised, rotate the felling head fully to the other side. While holding the joystick wrist finger switch depressed, check gauge pressure reading.

If less than 3200 psi., readjust port relief.

Repeat above procedure until a gauge reading of 3200 psi is obtained. Center the felling head and lower to the ground.

Continued on page 12

Tigercat 853E Feller Buncher

Tree clamps and wrist

Continued from page 11

12.

With throttle control in the FULL position; Unscrew 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.

13.

Remove pressure gauge and reinstall plugs and caps.

_________________________________________

18.12

Tigercat 853E Feller Buncher

Tree clamps and wrist

TREE CLAMP, ACCUMULATING ARMS AND WRIST CIRCUIT 853SM46

(Serial No. 8530371 to 8530392; 8530394 to 8530399)

18.13

Tigercat 853E Feller Buncher

Tree clamps and wrist

TREE CLAMP, ACCUMULATING ARMS AND WRIST CIRCUIT 853SM53

(Serial No. 8530393; 8530400 and up)

18.14