Tigercat 720D FELLER BUNCHER Operator's Manual - PDF DOWNLOAD

OPERATOR'S MANUAL Tigercat 720D FELLER BUNCHER ISSUE 1.1, MARCH 2003 TABLE OF CONTENTS SECTION INTRODUCTION .............................................................................................................. iii SAFETY ............................................................................................................................ 1 USING HIGH SPEED DISC SAWS SAFELY .......................... APPENDIX TO SECTION 1 CONTROLS AND OPERATION ........................................................................................ 2 LUBRICATION AND MAINTENANCE ............................................................................... 3

720dom00

720D Available Literature Operator's Manual (this manual) ......... Part Service Manual .................................... Part Parts Catalog ....................................... Part Hydraulic Adapters Book ..................... Part Hose Assemblies Book ....................... Part

No. No. No. No. No.

18872A 18873A 18871A 1472A 3707A

Tigercat

®

Tigercat Industries Inc. P.O. Box 544 Paris, Ontario Canada N3L 3T6 Tel: (519) 442-1000 Fax: (519) 442-1855

Tigercat 720D Feller Buncher

Introduction

ii

Tigercat 720D Feller Buncher

Introduction

Tigercat 720D Feller Buncher

INTRODUCTION An Operator's manual, Service manual and a Parts catalog are made available by Tigercat to assist the dealer, customer and operator in becoming familiar with the features of the 720D Feller Buncher.

The operator's manual will assist the operator with the techniques of proper and safe operation of the 720D Feller Buncher. There is also important information regarding the safe operation of the saw head.

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

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

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

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

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

Tigercat Industries Inc.

720D-01

iii

Tigercat 720D Feller Buncher

Introduction

S.A.E. STANDARDS ROLL-OVER PROTECTION STRUCTURES (ROPS) FALLING OBJECTS PROTECTION STRUCTURES (FOPS) OPERATOR PROTECTION STRUCTURES (OPS) * MODIFICATIONS AND REPAIRS: The integrity of the ROPS, FOPS, OPS structure and its continued ability to provide the level of protection it was designed for could be seriously affected by any modifications to the structure, its mounting or to the chassis to which it is attached.

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

Tigercat may officially grant approval for modifications only by: i.

Written approval of repairs or modifications signed by the Tigercat Engineering Manager; or

ii.

Approved modifications officially released by Tigercat.

Both of the above are provided that the work is carried out in the factory approved manner.

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

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

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

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

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

Tigercat Industries Inc.

iv

Tigercat 720D Feller Buncher

Introduction

NON-APPROVED FIELD PRODUCT CHANGES

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

IT IS Tigercat POLICY THAT NO CHANGES ARE TO BE MADE TO ITS PRODUCTS INCLUDING DELETIONS OR ADDITIONS OTHER THAN A Tigercat APPROVED OPTION FITTED IN THE FACTORY APPROVED MANNER. Official approval to make changes or install options is only to be undertaken as follows: i)

The relevant options for that product must be shown or listed on current Tigercat documentation or literature such as a printed specification sheet, price list, parts manual, or product literature issued by Tigercat.

ii)

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

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

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

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

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

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

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

Tigercat Industries Inc.

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Tigercat 720D Feller Buncher

Introduction

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Tigercat 720D Feller Buncher

SECTION 1 - SAFETY MARCH 2003

Read and understand this safety section prior to operating any equipment.

Read and understand all manuals for any attachments or accessories.

CONTENTS - SECTION 1 ARTICULATION LOCK BAR ........................................................................ 1.12 BOOM LIFT LOCK ....................................................................................... 1.12 ENGINE ACCESS PANELS ......................................................................... 1.10 FELLING TREES ........................................................................................... 1.7 FIRE PREVENTION ..................................................................................... 1.14 FIRE PREVENTION GUIDELINES ........................................................... 1.14 WHAT ELSE TO DO BEFORE YOU EXPERIENCE A FIRE .................... 1.15 WHAT TO DO AFTER A FIRE ................................................................. 1.16 WHAT TO DO IN CASE OF A MACHINE FIRE ........................................ 1.15 PARKING THE MACHINE ............................................................................. 1.8 SAFETY INTERLOCK SWITCHES ON CAB DOORS ................................... 1.9 SAFETY PRECAUTIONS, GENERAL ........................................................... 1.3 SAFETY PRECAUTIONS, OPERATING ....................................................... 1.6 SAFETY PRECAUTIONS, SERVICING ....................................................... 1.10 SAFETY SYMBOLS ....................................................................................... 1.2

Tigercat 720D Feller Buncher

Safety

SAFETY SYMBOLS

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

Follow the instructions in the safety message.

Understanding Signal Words

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

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

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

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

1.2

Tigercat 720D Feller Buncher

Safety

GENERAL SAFETY PRECAUTIONS

KEEP BACK 500 FEET

Remember that safety is a prime responsibility of all.

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

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

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

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

Follow all instructions from safety inspector and supervisors.

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.

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 let an untrained person operate the machine.

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

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

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

Do not use the joystick(s) or steering wheel as a handle to assist entering or leaving the cab.

Do not use the machine foot controls as a step.

Use recommended protective clothing and safety devices such as orange safety vest, gloves, safety boots, safety hat, goggles, and ear protection when necessary. These safety rules highlight both general and specific measures the operator should be familiar with and adhere to. More specific measures are illustrated with pictograms which may also be attached to the machine in locations pertinent to their respective message. Keep safety labels in good condition. Repair or replace damaged labels.

1.3

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

Tigercat 720D Feller Buncher

Safety

GENERAL SAFETY PRECAUTIONS continued Avoid mounting or dismounting the machine in areas with slippery surfaces. If this is not possible clean up or cover slippery surfaces with a nonslip material.

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

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

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

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

Machines should be completely cleaned of debris at least daily, particularly around the engine exhaust components. Hydraulic oil leaks, excess grease, fuel and oil accumulation (including spillage) should be eliminated immediately.

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

Machine should be washed completely at every major service.

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

If these are found, Do Not Touch!!!

Determine the material composition of any seals or gaskets, If fluoro-elastomer seals (Viton, fluorel, or tecmoflon) have been used, the affected area must be decontaminated before undertaking further work. Natural rubber and nitrile materials are not hazardous.

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

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

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

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

Check windows and door guards for damage.

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

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

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

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

Check all fluid levels.

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

1.4

Tigercat 720D Feller Buncher

Safety WARNING WARNING

GENERAL SAFETY PRECAUTIONS continued

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

Maintain a charged fire extinguisher on the vehicle at all times and KNOW HOW TO USE IT. Do not carry passengers either in the cab or anywhere else on the machine. The vehicle is provided and approved with seating for the operator only.

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

Wash hands after handling.

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.

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

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

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

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

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

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

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

Install the articulation lock bar when ever the machine is to be transported.

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

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

1.5

Tigercat 720D Feller Buncher

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

OPERATING SAFETY PRECAUTIONS

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

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

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

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

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

Sound the machine horn before starting the machine.

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

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

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

Keep the brake properly adjusted at all times.

Start the engine according to the instructions in this manual. Refer to OPERATING MACHINE in SECTION 2 of the OPERATOR'S MANUAL. Before moving the machine to the work site, check to ensure that all doors, panels, and access covers are installed properly and secured.

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

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

Secure loose items in the cab.

1.6

Tigercat 720D Feller Buncher

Safety

OPERATING SAFETY PRECAUTIONS continued

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

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

NEVER travel across a STEEP slope or side hill:

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

Boom supports encroach on cab door opening when machine is steered.

If you travel across a MODERATE slope, NEVER make an uphill turn as this could cause a tip-over situation.

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

Do not run engine when persons are on steps or in doorway area.

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

Serious injury or death could result from crushing.

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

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

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

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

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

Ensure that all saw tooth retaining bolts are at correct torque value.

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

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

Always replace saw tooth retaining bolts when replacing saw teeth.

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

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

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

Use only prearranged and approved signalling practices.

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

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

Shut down machine immediately if vibration occurs during cutting.

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

Check that the saw discharge area is clear and undamaged.

When travelling position felling head and boom accordingly so as not to impair vision.

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

1.7

Tigercat 720D Feller Buncher

Safety Before leaving operator's cab, apply the parking brake and lower the felling attachment onto the ground.

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

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

Do not over load felling head.

Park on level ground.

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

Do not park on a hillside or incline.

Lower felling attachment onto level ground.

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

Engage the parking brake.

Stop the engine and release pilot system pressure by performing the following steps:

When parking the machine:

1. Close both doors. Turn key switch to ON position. Do not start the engine. Press pilot reset switch.

WARNING Workers on the ground should stand behind the wheels of the machine to provide an added barrier to thrown objects.

Complete AEJDAH steps 2A or 2B. 2A.Fully apply brake foot pedal 50 times or more.

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

2B.Turn rear differential switch ON and hold front differential lock switch ON for 30 seconds. While waiting, pump brake foot pedal at least 10 times.

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

3. Pressure may remain in the system after completing all of the above steps.

Use caution when loosening hydraulic connections.

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

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

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

Never use this machine to clear a logging deck on a new tract of timber when the rest of the equipment and operator's are also moving in. Preplan to clear decks in advance before other equipment arrives.

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

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

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

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

1.8

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

Tigercat 720D Feller Buncher

Safety SWITCH

OPERATING SAFETY PRECAUTIONS continued

When travelling on public roads, use accessory lights (when installed) and other cautionary devices to provide operators of other vehicles warning of your approach. Ensure your machine meets all regulatory requirements.

ACTUATOR

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.

INTERLOCK SWITCH (L.H. DOOR SHOWN)

197-5

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

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

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

CAUTION DO NOT use the steering joystick or steering wheel to assist entering or leaving the cab.

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

To operate: Close both doors and press the PILOT RESET switch.

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

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

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

1.9

Tigercat 720D Feller Buncher

Safety LOWER ACCESS PANELS

SERVICING SAFETY PRECAUTIONS

RETAINING BRACKETS

724D-D14

Conduct maintenance inspections at least as frequently as recommended in SECTION 3 of the OPERATOR'S MANUAL.

LOWER ACCESS PANELS

CAUTION The LOWER engine compartment access panels on a standard configuration are NOT HINGED or permanently attached to the machine, the UPPER doors when closed hold the LOWER panels in place. Once an UPPER DOOR is opened remove the LOWER panel from the machine. DO NOT apply any weight or pressure to the LOWER panel. DO NOT use these LOWER panels as hand grips, when servicing the machine.

When servicing or repairing equipment, shut the engine down, and disconnect the positive (+) battery cable from both batteries.

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

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

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

UPPER DOORS

HAND KNOB

HAND KNOB

LOWER ACCESS PANELS 724D-D15

This machine is equipped with a reversible cooling fan to facilitate cleaning of the radiator/oil cooler assembly and engine compartment doors.

Exercise care when working in this area with the engine running. If the fan switch in the cab is in the AUTO position, the fan could turn ON and/or go into REVERSE mode.

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 electrical current does not pass through bearings, especially the center joint bearing. Also, disconnect the positive (+) battery cable from both batteries.

STANDARD ENGINE ACCESS PANELS

1.10

Tigercat 720D Feller Buncher

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

SERVICING SAFETY PRECAUTIONS continued WARNING

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

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.

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

Never use bare hand to check for fluid leaks.

Fluid leaks under pressure may not be visible.

When searching for leaks, wear work gloves and use a wrench or piece of wood to move hydraulic hoses. Do not grab hold of hydraulic hoses. Wear safety goggles for eye protection.

Pressure can be maintained in a hydraulic system long after the power source and pump have been shut down. Lower the felling head to the ground, stop engine and relieve trapped pressure from pilot system and brake accumulators before before performing work on components, or disconnecting any hoses. For the procedure on how to RELIEVE PRESSURE, refer to PARKING THE MACHINE in THIS SECTION.

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

1.11

Tigercat 720D Feller Buncher

Safety

SERVICING SAFETY PRECAUTIONS continued

WARNING

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

Always install 'T' handle retainer bolt Use only to support boom and cutting head Do not use to set hydraulics pressures

CAUTION

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.

195-24

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

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

FRAME ARTICULATION LOCK BAR

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

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

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

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

1.12

Tigercat 720D Feller Buncher

Safety

SERVICING SAFETY PRECAUTIONS continued

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.

1.13

Tigercat 720D Feller Buncher

Safety dislodged by vibration this smoldering debris can fall into other areas of the machine and thereby spread a fire.

FIRE PREVENTION

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.

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.

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.

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.

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.

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.

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.

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

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.

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.

1.14

Tigercat 720D Feller Buncher FIRE PREVENTION continued

Safety WHAT TO DO IN CASE OF A MACHINE FIRE

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

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.

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

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

Shut the engine off.

Activate the fire suppression system*

Radio or call for help (as appropriate).

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

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

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

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

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

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

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

Use the PASS method with most extinguishers.

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

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

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

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

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

Prevent the fire from happening by ensuring that the machine is cleaned regularly and all systems are well maintained.

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

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

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

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

Continued on page 16

*NOTE: Dry chemical fire suppression systems are offered by Tigercat as an optional installation on some of the Tigercat product lines. Please disregard any references made to fire suppression systems if not installed on your machine.

1.15

Tigercat 720D Feller Buncher FIRE PREVENTION continued Continued from page 15

20229A

Safety WHAT TO DO AFTER A FIRE

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

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

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

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

TYPICAL FIRE EXTINGUISHER ACCESS HOLE

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

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

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

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

1.16

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

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

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

Tigercat

5211A • R2-1101

PAGE 1 OF 16

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using high speed disc saws safely FORWARD:

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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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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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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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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.

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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

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®

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

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

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

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

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

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

7

using high speed disc saws safely Comments and Instructions cont.

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

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

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

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using high speed disc saws safely

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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

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using high speed disc saws safely Comments and Instructions cont.

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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.

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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.

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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.

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

THROW GAP

FIGURE 12: SAW BLADE THROW GAP

13

using high speed disc saws safely Comments and Instructions cont.

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

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

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

FIGURE 13: SAW BLADE ENTRANCE AND EXIT SPACE

14

using high speed disc saws safely Comments and Instructions cont.

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

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

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

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

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

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

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

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

Do not over speed the blade rpm.

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

Do not neglect tooth fastening inspection, maintenance and replacement.

Do not neglect to repair worn or damaged saw housings.

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

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

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

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

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

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

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

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

Do not select and operate heads that throw rearward.

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

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

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using high speed disc saws safely

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Tigercat 720D Feller Buncher SECTION 2 - CONTROLS AND OPERATION MARCH 2002

CONTENTS - SECTION 2 ACCUMULATING ARMS ......................................... 2.2 AIR CLEANER, ENGINE AIR ................................ 2.23 AIR CLEANER UNLOADER VALVE ...................... 2.23 AIR CONDITIONER/HEATER .................................. 2.8 AIR VENTS .............................................................. 2.8 ARTICULATION LOCK BAR .................................. 2.37 AUXILIARY POWER OUTLET ............................... 2.18 AUXILIARY SWITCH LOCATION .......................... 2.17 BATTERY DISCONNECT SWITCH ....................... 2.20 BOOM CYLINDER LOCK ...................................... 2.38 BOOM LIFT .............................................................. 2.2 BRAKES ................................................................... 2.3 BULB TEST/ENGINE SHUTDOWN OVERRIDE - SWITCH ......................................... 2.15 CARE OF THE MACHINE ...................................... 2.33 CENTER JOINT LOCK PIN ................................... 2.37 CIGAR LIGHTER ................................................... 2.18 CLAMP ARMS ......................................................... 2.3 CLEANING A/C CONDENSER, OIL COOLER AND RADIATOR .................................................. 2.24 CLEANING LEXAN WINDOWS ............................. 2.34 CONTROLS - CAB ................................................... 2.2 CREEP SWITCH ................................................... 2.14 DIFFERENTIAL LOCK, (FRONT) SWITCH .... 2.2, 2.14 DIFFERENTIAL LOCK, (REAR) SWITCH ............. 2.14 DOME LIGHT ........................................................... 2.5 DRIVE 1-2-3 -SWITCH .......................................... 2.14 DRIVE CONTROL .................................................... 2.2 EMERGENCY EXIT/SKYLIGHT ............................... 2.5 ENGINE ACCESS PANELS .................................. 2.20 ENGINE AIR PRECLEANER ................................. 2.22 ENGINE COMPARTMENT .................................... 2.20 ENGINE, HOT WATER SHUT OFF VALVE ............ 2.9 ENGINE, RESTARTING AFTER RUNNING OUT OF FUEL ...................................................... 2.30 ENGINE RPM .......................................................... 2.3 ENGINE, STARTING ............................................. 2.30 ENGINE, STARTING IN COLD WEATHER ........... 2.31 ENGINE, STOPPING ............................................. 2.33 ETHER STARTING AID (OPTIONAL) ................... 2.31 FAN SWITCH ......................................................... 2.16 FILTER - CAB FRESH AIR ...................................... 2.9 FILTER, RECIRCULATING AIR - A/C UNIT ............ 2.8 FOOT CONTROL, CENTER .................................... 2.3 FOOT CONTROL, LEFT .......................................... 2.3 FOOT CONTROL, RIGHT ........................................ 2.2 FUEL TANK ........................................................... 2.21 FUSE PANEL ......................................................... 2.18

GAUGES ENGINE COOLANT TEMPERATURE ...............

ENGINE OIL PRESSURE ..................................

HYDRAULIC OIL TEMPERATURE ....................

TACHOMETER ..................................................

VOLTMETER ......................................................

2.12 2.12 2.12 2.12 2.12

HEAD TILT ............................................................... 2.2 HORN SWITCH ..................................................... 2.13 HOT WATER SHUT OFF VALVE (ENGINE) ........... 2.9 HOURMETER ........................................................ 2.18 HYDRAULIC HAND FILL PUMP ............................ 2.22 HYDRAULIC OIL RESERVOIR .............................. 2.21 INSTRUMENT PANEL ........................................... 2.10 JOYSTICK, LEFT ..................................................... 2.2 JOYSTICK, RIGHT ................................................... 2.2 KEY SWITCH ......................................................... 2.17 LIGHT - DOME ......................................................... 2.5 LIGHTS SWITCH, WORKING, REAR .................. 2.10 LIGHTS SWITCH, WORKING, FRONT ................. 2.10 MACHINE PREPARATION .................................... 2.32 SYSTEM TEST AND WARM-UP ....................... 2.32 OPERATING MACHINE ......................................... 2.26 PRE-START CHECKS ....................................... 2.26 PARKING BRAKE .................................................... 2.4 PILOT RESET SWITCH ......................................... 2.13 PILOT SYSTEM SHUT OFF .................................. 2.13 PRECLEANER, ENGINE AIR ................................ 2.22 PRESSURIZED WATER SYSTEM .......................... 2.4 RADIO, AM/FM STEREO CASSETTE ..................... 2.5 SAW CIRCUIT PRESSURE - GAUGE .................. 2.18 SAW SWITCH ....................................................... 2.13 SEAT ........................................................................ 2.6 SKYLIGHT/EMERGENCY EXIT ............................... 2.5 STARTING ENGINE .............................................. 2.30 STEERING ............................................................... 2.2 STEREO CASSETTE/RADIO .................................. 2.5 STOPPING ENGINE .............................................. 2.33 THROTTLE CONTROL ............................................ 2.3 TOWING INSTRUCTIONS .................................... 2.35 TRANSPORTING INSTRUCTIONS ....................... 2.36 VACUUM PUMP (OPTIONAL - EARLIER) ............ 2.17 WARNING LIGHTS COOLANT LEVEL .............................................. 2.10 COOLANT TEMPERATURE .............................. 2.10 ENGINE OIL PRESSURE .................................. 2.10 HYDRAULIC OIL TEMPERATURE .................... 2.11 LOW HYDRAULIC OIL LEVEL .......................... 2.11 WATER SYSTEM, PRESSURIZED ........................ 2.4

Tigercat 720D Feller Buncher

Controls and Operation IMPORTANT

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

CONTROLS - CAB 2 1

197-1

L.H. JOYSTICK

196-24A

2.

1. STEERING JOYSTICK - LEFT

R.H. JOYSTICK

BOOM JOYSTICK - RIGHT Boom Lift Move the joystick BACK to RAISE the boom.

Steering Move the joystick to the RIGHT to turn the machine to the RIGHT.

Move the joystick FORWARD to LOWER the boom.

Move the joystick to the LEFT to turn the machine to the LEFT.

Head tilt Move the joystick to the RIGHT to tilt the felling head OUT.

The steering "speed" can be controlled by the amount the joystick is moved to the right or left. A small movement of the joystick will turn the machine slowly and a large movement of the joystick will cause the machine to turn very rapidly. The steering joystick does not move forward or back.

Move the joystick to the LEFT to tilt the felling head IN. Thumb Switch - Accumulating Arms Push the rocker switch to the LEFT to OPEN the accumulator arms.

Thumb Switch - Differential Lock, Front Push and hold this thumb switch to the left or right to LOCK the FRONT differential and provide driving torque to BOTH front wheels.

Note for machines equipped with the optional steering wheel the front differential lock switch is located on the instrument panel. Refer also to DIFFERENTIAL LOCK, (FRONT) SWITCH and DIFFERENTIAL LOCK, (REAR) SWITCH in THIS SECTION.

Push the rocker switch to the RIGHT to CLOSE the accumulator arms.

3. RIGHT FOOT CONTROL - DRIVE CONTROL Press the RIGHT foot pedal to drive FORWARD. Press the LEFT foot pedal to drive in REVERSE. NOTE: A backup horn will sound when travelling in reverse.

IMPORTANT Use differential locks ONLY when additional traction is required. Do not continuously drive the machine with the differential locks on as this will result in damage to the axles.

2.2

Tigercat 720D Feller Buncher 5 5A

Controls and Operation 3

4

6

337-13 213-20

FOOT PEDALS

THROTTLE CONTROL

6. THROTTLE CONTROL

4. CENTER FOOT CONTROL - BRAKES

For HIGH IDLE engine RPM push button on end of throttle control and PULL out completely.

Depress the foot pedal to apply the hydraulic brakes.

For LOW IDLE engine RPM push button in and PUSH in throttle control completely.

NOTE: As a safety precaution before working on or around the machine. Stop the engine and release pilot system pressure by performing the following steps:

NOTE: All harvesting operations should be performed at HIGH idle.

1. Close both doors. Turn key switch to ON position. Do not start the engine. Press pilot reset switch.

Complete either steps 2A or 2B. 2A.Fully apply brake foot pedal 50 times or more.

2B.Turn rear differential switch ON and hold front differential lock switch ON for 30 seconds. While waiting, pump brake foot pedal at least 10 times.

3. Pressure may remain in the system after completing all of the above steps.

Use caution when loosening hydraulic connections.

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

Maintaining Correct Engine RPM. It is most important that the RPM of the engine be correct at all times: Cummins 'B' Series Engine Low Idle 800 ± 25 RPM (No Load) High Idle 2475 ± 25 RPM (No Load) John Deere Engine Low Idle 850 ± 25 RPM. (No Load) High Idle 2600 ± 25 RPM. (No Load)

CAUTION Under no circumstances allow the high idle engine RPM to vary from the recommended settings; particularly faster, as serious damage to the hydraulic components will result.

5. LEFT FOOT CONTROL, (WITH SAW) CLAMP ARMS

NOTE: When setting pressures, increase Low Idle to 1000 RPM with throttle control.

Press the LEFT foot pedal to OPEN the clamp arms.

Press the RIGHT foot pedal to CLOSE the clamp arms.

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

5A. LEFT FOOT CONTROL, (WITH SHEAR) CLAMP ARMS/SHEAR

The engine RPM should be checked regularly with a calibrated hand tachometer.

Press the LEFT foot pedal to OPEN the clamp arms and shear (simultaneously).

Press the RIGHT foot pedal to CLOSE the clamp arms and shear (simultaneously).

2.3

Tigercat 720D Feller Buncher

Controls and Operation HOSE

WATER SHUT OFF VALVE (SHOWN CLOSED)

8

PROXIMITY SENSOR

196-16A

7

PRESSURIZED WATER SYSTEM CONTROL VALVE (UNDER SEAT)

8. VALVE - Pressurized Water System Turn the hand operated ball valve (shut off valve) under the seat to the ON position to draw water from the 10.5 gallon pressurized holding tank at the rear of the machine. When not in use turn the water supply OFF at this valve and relieve the pressure in the rubber hose, under the operator's seat.

337-19

PARKING BRAKE DISENGAGED POSITION

The pressure gauge on the side of the seat should read 60 psi.

337-20

AIR CHARGE VALVE

7

PARKING BRAKE ENGAGED POSITION

7. PARKING BRAKE

PRESSURE GAUGE

PULL up on handle to ENGAGE parking brake.

196-9A

PUSH down on the handle to DISENGAGE parking brake.

PRESSURIZED WATER SYSTEM

Refer to PRESSURIZED WATER SYSTEM MAINTENANCE in SECTION 3 of THIS MANUAL

This parking brake operates ONE of TWO disc brake calipers on the transmission. The second caliper is used only when setting up the machine hydraulic system.

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

A proximity sensor is attached to the brake lever housing. This electrical circuit prevents the machine from being driven when the parking brake is engaged.

Keep the brake properly adjusted at all times.

The parking brake linkage should be serviced (adjusted and lubricate pivots) every 500 hours under normal operating conditions.

2.4

Tigercat 720D Feller Buncher 9

10

11

Controls and Operation 11

197-7x

9. LIGHT - DOME The switch is located on the side of the dome light fixture.

10. SKYLIGHT/EMERGENCY EXIT Provides tree top visibility and serves as a third cab exit should the two doors become blocked. There are two retaining handles on the inside and two on the outside to allow removal of the hatch from either side. These handles should only be HAND TIGHTENED, to allow them to be unscrewed in case of an emergency.

11. AM/FM STEREO CASSETTE With two front mounted speakers.

Refer to component manufacturer's manual supplied with the machine for adjustment procedures.

2.5

Tigercat 720D Feller Buncher

Controls and Operation RIDE ADJUSTMENT After adjusting height, the ride adjustment should be made by turning the RIDE ADJUSTMENT KNOB counter-clockwise until the seat cushion is level.

12. SEAT

WARNING The seat and shoulder restraint belts must be used at all times when operating this machine.

ADJUSTMENTS HEIGHT ADJUSTMENT The spring-assisted height adjustment is controlled by the HEIGHT ADJUSTMENT LEVER located on the front left side of the seat chassis. The four height settings: top, bottom and two in between, provide a total height adjustment of 3 .

To Raise Firmly lift up on the HEIGHT ADJUSTMENT LEVER. When the lever releases, hold it up while partially lifting the operator s body weight from the seat. When the seat is at the desired height, firmly push down on the lever until the seat locks (a click should be heard).

To Lower Firmly lift up on the HEIGHT ADJUSTMENT LEVER. When the lever releases, partially apply operator body weight to the seat until the seat is at the desired height. firmly push down on the lever.

Hold lever down until the seat locks into position (a click should be heard).

4-WAY ADJUSTABLE LUMBAR To position lumbar mechanism vertically, move VERTICAL ADJUSTMENT KNOB up or down.

For fore-and-aft displacement, rotate HORIZONTAL ADJUSTMENT KNOB. BACK ANGLE ADJUSTMENT Rotate BACK ANGLE ADJUSTMENT KNOB to place seat at the desired angle.

FORE/AFT SLIDE Move and hold FORE/AFT SLIDE LEVER. Roll seat forward or backward to the desired position relative to the foot pedal controls.

ARMREST ADJUSTMENT Each armrest has 2 adjustments to place it in the required position. Loosen adjustment locking wingbolts to reposition armrest height and fore/aft position.

4-WAY LUMBAR HORIZONTAL ADJUSTMENT

4-WAY LUMBAR VERTICAL ADJUSTMENT 4-WAY LUMBAR HORIZONTAL ADJUSTMENT

332-6

RIDE ADJUSTMENT KNOB

FORE/AFT SLIDE LEVER 332-1

SEAT ADJUSTMENTS

BACK ANGLE ADJUSTMENT KNOB HEIGHT ADJUSTMENT LEVER

2.6

RIGHT SIDE OF SEAT

ARMREST ADJUSTMENT

Tigercat 720D Feller Buncher

Controls and Operation

PROBLEMS AND CORRECTIVE ACTION RIDES TOO STIFF/SEAT TENDS TO PUSH OR THROW OPERATOR FORWARD The RIDE ADJUSTMENT KNOB has been tightened (turned counter-clockwise) too much.

This typically happens because the operator is trying to use additional RIDE ADJUSTMENT KNOB rather than the HEIGHT ADJUSTMENT LEVER to raise the seat. Operator is riding the seat in the low height position setting. Refer to HEIGHT ADJUSTMENT. RIDES TOO SOFT OR BOTTOMS OUT AND PINCHES OPERATOR The seat RIDE ADJUSTMENT KNOB has not been tightened (turned counter-clockwise) enough. Insufficient ride adjustment exaggerates the knee-action movement of the seat. This usually happens because the operator is trying to lower the seat by decreasing the amount of ride adjustment instead of using the HEIGHT ADJUSTMENT LEVER. Refer to HEIGHT ADJUSTMENT. SEAT TOO HIGH/SEAT TOO LOW There are several things which can cause improper seat height. Refer to the HEIGHT ADJUSTMENT and adjust seat to the desired position. If the proper height cannot be reached using one of the four height adjustment settings, it may be necessary to install the seat on a higher base.

OPERATOR S LEGS FALLING ASLEEP The seat is adjusted too high, and the RIDE ADJUSTMENT KNOB has not been tightened (turned counter-clockwise) enough, resulting in the operator sitting in a bucket . Refer to HEIGHT ADJUSTMENT and RIDE ADJUSTMENT.

2.7

Tigercat 720D Feller Buncher C

A

B

Controls and Operation 14

D

•

E

14

AIR CONDITIONER HEATER CONTROLS 13. AIR CONDITIONER/HEATER 7501-8A

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

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

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

14

C. AIR SOURCE - 2 POSITION This is a rotary, two position switch to select either, outside fresh air or to recirculate inside air.

196-12A

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

AIR VENTS AND RE-CIRCULATING AIR FILTER

14. AIR VENTS The Air Conditioner/Heater package has seven air outlets in the cab.

15

E. AIR CONDITIONING - VARIABLE This is a variable, rotary dial to adjust the temperature of cooled air for the cab.

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

208-19

AIR FILTER

15 FILTER, RECIRCULATING AIR - A/C UNIT

IMPORTANT

When the AIR SOURCE switch is in the RECIRC AIR position, air in the cab is drawn into the A/C- HEATER unit via this filter and recirculated. The filter is located at the base of the A/C unit, below the right arm rest of the operator s seat. It should be cleaned or replaced every 125 hours. Remove the two thumb screws in the filter box cover to access the filter.

It is recommended that during cold weather when the A/C system is not in use, that it be run for a period of 5 minutes every 2 weeks. This will circulate oil to all components of the A/C system.

2.8

Tigercat 720D Feller Buncher

Controls and Operation

ENGINE

SHUT-OFF 17 VALVE

16

HOSE TO A/C HEATER UNIT 720D-10

157-19A

ENGINE

FRESH AIR FILTER

HOT WATER SHUT OFF VALVE (JOHN DEERE ENGINE) SHUT-OFF VALVE

17

16. FILTER - CAB FRESH AIR

When the AIR SOURCE control knob (C) on the A/C Heater control panel is in the FRESH AIR position, outside air is drawn into the cab A/C Heater unit through this filter and mixed with interior air from the cab. The filter is located in the rear of the cab roof and accessible from outside the cab. It should be checked every 125 hours. This is done by removing 6 bolts and removing the air inlet cover. Next remove 2 bolts and remove the filter retainer. This will allow access to the filter.

HOSE TO A/C HEATER UNIT

720D-09

HOT WATER SHUT OFF VALVE (CUMMINS ENGINE)

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

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

CAUTION If using compressed air for cleaning, use at 30 psi or less.

Always use personal protective equipment to guard against flying debris.

2.9

Tigercat 720D Feller Buncher 1

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Controls and Operation

7

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724D-D59

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EARLY MACHINES

INSTRUMENT PANEL- EARLY MACHINES

INSTRUMENT PANEL

4. COOLANT LEVEL RED LIGHT AND HORN

1. LIGHTS, FRONT (OPTIONAL)

This light will come ON and horn will SOUND when the coolant level drops below a safe operating level. The sensor is located in the radiator top tank. If this alarm is activated while the engine is running stop the engine immediately and correct the fault before restarting the engine. Refer to OPERATING MACHINE - PRESTART CHECKS in THIS SECTION for fill location and information.

Refer to SERVICE AND LUBRICATION CHART in SECTION 3 of THIS MANUAL for correct mixture of coolant antifreeze.

This switch will turn on the lights that illuminate the area in front of the cab. No switch is installed if option not installed.

2. LIGHTS, REAR (OPTIONAL) This switch will turn on the lights that illuminate the area behind the cab. No switch is installed if option not installed.

3. COOLANT TEMPERATURE RED LIGHT AND HORN The light will come ON and horn will SOUND when engine coolant temperatures reach 215°F. If this alarm is activated while the engine is running stop the engine immediately, investigate the cause and correct the fault before restarting the engine.

See CLEANING A/C CONDENSER, OIL COOLER AND RADIATOR and FAN SWITCH (OPTIONAL) in THIS SECTION for more information.

5. ENGINE OIL PRESSURE RED LIGHT AND HORN The light will come ON and horn will SOUND when engine oil pressure falls below 10psi.

Note that the automatic engine shutdown feature will automatically stop the engine if oil pressure falls below 10psi. Investigate the cause and correct the fault before attempting to restart the engine. See OPERATING MACHINE in this SECTION for more information.

2.10

Tigercat 720D Feller Buncher 1

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Controls and Operation

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LATER MACHINES

724D-D61

INSTRUMENT PANEL - LATER MACHINES

6. LOW HYDRAULIC OIL LEVEL RED LIGHT AND HORN

7. HYDRAULIC OIL TEMPERATURE RED LIGHT AND HORN

This light will come ON and a horn will SOUND when the hydraulic oil level falls approximately 10 gal. US (38L) below the FULL mark.

This light will come ON and horn will SOUND when the hydraulic oil temperature reaches 205°F. Normal operating temperatures should not exceed 180°F.

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

If the temperature goes above 180°F check the following: Plugged oil cooler Malfunction in a hydraulic system High loads on the hydraulic system Low hydraulic oil level

When this alarm is activated stop the engine and look for signs of broken hoses or other leaks. Repair leaks and refill the tank to FULL mark on the sight gauge. Restart engine and inspect for leaks.

Operation above 180°F will shorten hydraulic component life.

If the temperature reaches 205°F DO NOT continue to operate the machine. If this alarm is activated while the engine is running stop the engine immediately, investigate the cause and correct the fault before restarting the engine. See CLEANING A/C CONDENSER, OIL COOLER AND RADIATOR and FAN SWITCH (OPTIONAL) in THIS SECTION for more information.

2.11

Tigercat 720D Feller Buncher 1

2

4

3

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6

Controls and Operation

7

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724D-D59

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EARLY MACHINES

INSTRUMENT PANEL- EARLY MACHINES 10. HYDRAULIC OIL TEMPERATURE GAUGE

8. ENGINE COOLANT TEMPERATURE GAUGE

Displays the current hydraulic oil temperature registered in the hydraulic reservoir. If the temperature goes beyond 180°F check the following:

Displays current engine coolant temperature.

CUMMINS "B" engine should operate between 190°F and 210°F. If temperature goes beyond 215°F check for plugged cooling air intake door screens or plugged radiator.

DO NOT continue to operate machine above maximum temperature.

Plugged oil cooler Malfunction in a hydraulic circuit High loads on the hydraulic system Low hydraulic oil level

JOHN DEERE engine should operate between 180° F and 202° F. If temperature goes beyond 215°F check for plugged cooling air intake door screens or plugged radiator.

DO NOT continue to operate machine above maximum temperature.

Operation above 180°F will shorten hydraulic component life.

If temperature reaches 205°F alarm will sound, do not continue to operate the machine.

9. ENGINE OIL PRESSURE GAUGE

11. VOLTMETER GAUGE

The oil pressure should be greatest after starting a cold engine. It should operate between 35 and 70 psi. when the engine is running at rated engine speed, with SAE 10W30 oil and at operating temperature. If the gauge registers less than the above with engine running at high idle, check the engine oil level. Oil pressure must register on the gauge immediately after starting the engine.

Normal operating range for the electrical system is between 12 and 13.5 volts. A reading in excess of 15 volts indicates a possible faulty voltage regulator. A reading of less than 12 volts indicates a possible faulty battery or alternator.

12. TACHOMETER The tach indicates the speed of the engine.

For engine r.p.m. values, refer to THROTTLE CONTROL in THIS SECTION. For set - up of tachometer, refer to SECTION 7 of the SERVICE MANUAL.

NOTE: During low idle rpm. the oil pressure will be low. This is not an abnormal condition but must be closely monitored.

2.12

Tigercat 720D Feller Buncher 1

2

4

3

5

6

Controls and Operation

7

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LATER MACHINES

724D-D61

INSTRUMENT PANEL - LATER MACHINES

13. SAW SWITCH

16. PILOT SYSTEM SHUT OFF

Use this switch to turn the saw ON or OFF.

Both doors are equipped with interlock switches to prevent the machine from being operated while the doors are open (pilot system shut off).

Place throttle in HIGH IDLE before turning saw ON. Light in switch comes on when saw is operating. The light may not be on even though the saw switch is in the ON position, due to the safety interlocks mentioned above.

16

NOTE: If the engine is turned off with the saw switch in the ON position, the saw will not start up when the engine is restarted. The saw switch must be turned OFF and then back ON for the saw to start.

ACTUATOR

NOTE: On machines with a shear head, this switch is installed but is nonfunctional.

197-5

14. HORN - switch (spring return) 15. PILOT RESET

PILOT SYSTEM SHUT OFF To operate: Close both doors and press the pilot reset switch.

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

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

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

With the engine running and both doors closed, push this switch to REACTIVATE the pilot system after it has been deactivated by opening of the cab door, or by turning the key switch to the OFF position.

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

2.13

Tigercat 720D Feller Buncher 1

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4

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Controls and Operation

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724D-D59

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EARLY MACHINES

INSTRUMENT PANEL- EARLY MACHINES

17. DIFFERENTIAL LOCK, FRONT (WITH OPTIONAL STEERING WHEEL ONLY)

19. CREEP This is a two position switch with a GREEN light.

Placing this rocker switch in the ON position will lock up the front axle differential and provide drive torque to both front wheels.

Placing this rocker switch in the ON position will put the hydrostatic drive into CREEP MODE. Creep mode provides maximum available tractive force to the wheels at a reduced speed. The light in the switch will stay ON when in creep mode. Place this switch in the OFF position to disengage CREEP MODE. (Note this switch was replaced by the Drive 1-2-3 switch on later machines)

Machines equipped with joystick steering have the front differential lock located on the left hand steering joystick thumbswitch. Refer to JOYSTICK, LEFT THUMBSWITCH in THIS SECTION.

IMPORTANT Use differential locks ONLY when additional traction is required. Do not continuously drive the machine with the differential locks on as this will result in damage to the axles.

20. DRIVE 1-2-3 -SWITCH This three position switch controls the way in which the drive motors provide the required balance between torque and speed. (Note this switch replaces the CREEP switch which was used on earlier machines.)

18. DIFFERENTIAL LOCK, REAR This is a two position switch with a GREEN light.

POSITION 1 - CREEP MODE Placing this rocker switch in position 1 will put the hydrostatic drive into CREEP mode.

Creep mode occurs when both motors are set at maximum displacement. This provides maximum available tractive force to the wheels for hilly or wet areas and restricts the machine to the slowest travel speed.

Place this switch in the ON position to LOCK the REAR differential and provide driving torque to BOTH rear wheels. The light in the switch will stay ON when the rear differentials are locked. Place this switch in the OFF position to UNLOCK the rear differential.

2.14

Tigercat 720D Feller Buncher 1

2

4

3

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6

Controls and Operation

7

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29

28

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LATER MACHINES

INSTRUMENT PANEL - LATER MACHINES

724D-D61

21. BULB TEST/ENGINE SHUTDOWN OVERRIDE - switch

19

This momentary switch is used to perform two functions:

724D-D61

1. BULB TEST~ Hold this switch in the ON position to test ALL warning light bulbs on the instrument panel. Replace burnt out light bulbs immediately to ensure that all warning lights are in working order at all times.

CREEP SWITCH (SOME LATER MACHINES)

2. ENGINE SHUTDOWN OVERRIDE~ Used to override the automatic engine shutdown system (low oil pressure) when starting the engine. While holding the BULB TEST SWITCH in the ON position, turn the key switch to the START position to crank the engine. Hold down the BULB TEST SWITCH until oil pressure has developed.

Once the engine is running and has sufficient oil pressure, release the BULB TEST SWITCH. NOTE: The engine will stop if the oil pressure does not rise above 10 psi.

POSITION 2 - WORK MODE Placing this rocker switch in position 2 will put the hydrostatic drive into WORK mode. Work mode occurs when the left hand motor is set at maximum displacement and the right hand motor is allowed to change displacement based on motor regulation pressure. This provides moderately increased tractive force to the wheels and restricts the machine to the moderate travel speed.

POSITION 3 - TRAVEL MODE Placing this rocker switch in position 3 will put the hydrostatic drive into TRAVEL mode.

Travel mode occurs when both motors are allowed to change displacement based on motor regulation pressure. This provides maximum tractive force for hilly or wet areas when required and permits highest travel speed when moving from work site to work site.

2.15

Tigercat 720D Feller Buncher 1

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Controls and Operation

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724D-D59

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EARLY MACHINES

INSTRUMENT PANEL- EARLY MACHINES

22. FAN - SWITCH

position and the fan has stopped due to low engine coolant or hydraulic oil temperatures, turning ON the A/C will cause the FDC to immediately turn the cooling fan to run at 1200 rpm. This is to ensure that sufficient air flow is available for the cab A/C even while the machine is still warming up.

This is a three position switch, labelled CLEAN/AUTO/FULL ON*. This switch controls the operation of the hydraulic crossflow fan.

AUTO POSITION - AUTO is the normal operating position for the fan control switch.

When the switch is in the AUTO position, the fan will operate completely in an automatic mode. It will start, speed up, slow down or stop all based on the temperature of the engine coolant and/or the temperature of the hydraulic oil. The FDC (Fan Displacement Control) module automatically adjusts fan speed to the minimum required level to maintain optimal operating conditions.

FULL ON (OVERRIDE) POSITION - When the switch is in the FULL ON (OVERRIDE) position, the FDC system is overridden and the fan will run at FULL speed for cooling regardless of coolant or oil temperatures.

Normally the fan control switch is placed in the AUTO position for optimal cooling. The FULL ON (OVERRIDE) position is intended for use in the event of a temporary failure of the FDC.

Automatic control of fan speed to match your operating conditions can lower fuel consumption and reduce operating costs. In high temperature operating conditions the fan speed is increased to improve cooling ability and efficient operation of the oil cooler, radiator and air conditioning systems. In low temperature operating conditions fan speed is reduced, as less cooling is required for efficient operation of the oil cooler and radiator.

CLEAN (PURGE) POSITION - When the switch is in the CLEAN (PURGE) position the direction of rotation is reversed. Reverse rotation is used to clean the radiator, oil cooler, A/C condenser and air intake door screens. By "reversing" the flow of the fan, air flow is propelled in the opposite direction, thereby forcing dust and debris off of the radiator. The FDC control will also turn the A/C system OFF for as long as the fan switch is in the CLEAN (PURGE) position. The amount of time that the switch is held in the CLEAN (PURGE) position need not be more than 20 - 30 seconds.

Note that when the switch is in the AUTO *NOTE: The fan switch on earlier machines was labelled PURGE/AUTO/OVERRIDE, on current machines it is labelled CLEAN/AUTO/FULL ON

It is also important to manually clean debris 2.16

Tigercat 720D Feller Buncher 1

2

4

3

5

6

Controls and Operation

7

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29

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LATER MACHINES

724D-D61

INSTRUMENT PANEL - LATER MACHINES

from the machine on a regular basis to maintain low machine operating temperatures. Refer to CLEANING A/C CONDENSER, OIL COOLER AND RADIATOR in THIS SECTION.

greatly reduce oil leakage from the machine while hydraulic system repairs are underway.

The pump should remain ON during the time the repairs are in progress.

CAUTION

23. KEY SWITCH This is a three-position switch labeled OFF/ RUN/START.

When turning the vacuum pump switch to OFF always allow the tank to vent to the atmosphere for at least one minute before restarting the engine.

OFF Position - All electrical power fed throughkey the switch is turned OFF

Turning the vacuum switch OFF will stop the vacuum pump and open the tank to the atmosphere via a vent fitting. Always allow the tank to vent to the atmosphere for at least one minute before restarting the engine.

Restarting the engine while the tank still has a vacuum may cause air to enter the hydraulic system and result in cavitation damage to hydraulic pumps and motors.

RUN Position - Connects the battery to all functions. Used for normal machine operation.

START Position - Used to energize the starter motor to start the engine. NOTE: The parking brake must be in the ON position to start the engine.

24. AUXILIARY SWITCH LOCATION This switch location is used for various optional functions.

CAUTION The vacuum pump function cannot be used with the engine running. This is a safety feature and must not be defeated in any way or extreme damage to hydraulic components may result.

25. VACUUM PUMP (OPTIONAL - EARLIER MACHINES) With the KEY SWITCH turned OFF, turn the vacuum switch to the ON position to energize the vacuum pump and open the air space in the top of the hydraulic tank to the vacuum created by the vacuum pump. This will

Refer to VACUUM PUMP, HYDRAULIC OIL TANK in SECTION 10 of the SERVICE MANUAL for more information.

2.17

Tigercat 720D Feller Buncher 1

2

4

3

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6

Controls and Operation

7

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14 15 18 21

724D-D59

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EARLY MACHINES

INSTRUMENT PANEL- EARLY MACHINES

26. LIGHTER

30

Cigar/Cigarette lighter.

27. AUXILIARY POWER A 12 volt outlet with 20 amp capacity for portable devices such as phones.

28. FUSE PANEL

The fuses, diodes and relays are protected beneath a panel which can be opened by removing two screws.

29. HOURMETER This meter records the total number of hours the engine has run.

213-24

SAW PRESSURE GAUGE

30. SAW CIRCUIT PRESSURE - GAUGE This gauge is visible outside the lower right corner of the front window.

When the saw switch is put into the ON position, (engine at high idle) the gauge will show an initial value of 3500 - 3600 psi for the first 10 seconds. Then, as the blade speeds up, the gauge value should drop to about 3100 psi for another 12 to 15 seconds.

After a total elapsed time of approximately 30 seconds the gauge reading will drop to approximately 1200 - 1500 psi. and hold, as the blade has reached full speed.

2.18

Tigercat 720D Feller Buncher 1

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Controls and Operation

7

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29

INSTRUMENT PANEL - LATER MACHINES

724D-D61

During cutting operations the operator will see the gauge values rise as the blade slows down due to cutting, and fall as the blade speeds up. A reading of 1500 psi or above indicates that the blade has not attained full speed from the previous cut or has jammed.

Further cutting should be delayed until the pressure drops below 1500 psi to prevent stalling the saw blade during the next cut.

WARNING When leaving the cab to check the saw blade or other parts of the felling head, observe all safety rules listed in this manual and the attachment manufacturer's manual.

2.19

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LATER MACHINES

Tigercat 720D Feller Buncher ENGINE COMPARTMENT

Controls and Operation

CAUTION 1

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

UPPER DOORS

HAND KNOB

720D-11

This manually operated switch located in the left side of engine compartment, completely disconnects all electrical circuits on the machine from the battery.

WARNING Before leaving the machine unattended, always lower the felling head to the ground, engage the parking brake and turn off battery disconnect.

LOWER ACCESS PANELS

STANDARD ENGINE ACCESS PANELS

LOWER ACCESS PANELS

RETAINING BRACKETS

724D-D14

BATTERY DISCONNECT SWITCH

1. BATTERY DISCONNECT - SWITCH

HAND KNOB

724D-D15

LOWER ACCESS PANELS

2.20

Tigercat 720D Feller Buncher

Controls and Operation 3

DIPSTICK

SIGHT GAUGE HYD. OIL LEVEL

SENDING UNIT LOW HYDRAULIC OIL

2

FILTER SCREEN

724D-D65

HYDRAULIC OIL RESERVOIR

3. HYDRAULIC OIL RESERVOIR 195-16

Located at the left rear of the machine, the hydraulic reservoir has a capacity of 60 gallons (227 liters). A sight gauge, accessible through the rear door indicates the HIGH and LOW levels of the hydraulic oil.

Incorporated into this gauge is a low level sending unit which signals a low hydraulic oil light in the cab to come ON when the oil level is low. Always keep the hydraulic oil between the HIGH and LOW calibrations.

FUEL TANK DIPSTICK/FILTER SCREEN

2. FUEL TANK Located at the right rear of the machine, the fuel tank has a capacity of 71 gallons (270 liters) and incorporates a dipstick and filler screen under the filler cap. The dipstick slides through a hole in the side of the filler screen. DO NOT drop the dipstick into the filler tube or it will punch a hole in the bottom of the filler screen. The filler screen should be removed and cleaned every 125 hours (reach in and lift it out). Replace the screen if it is damaged.

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

Over filling causes the excess oil to discharge from the breather vent.

2.21

Tigercat 720D Feller Buncher

Controls and Operation 5. ENGINE AIR PRECLEANER The engine air precleaner cleans engine air before it reaches the air cleaner filter elements. It removes contaminants such as dust, powder, insects, rain and snow. This precleaner is self powered and self cleaning requiring virtually no maintenance. However, it should be checked periodically to make sure that foreign materials have not plugged the intake area or the exhaust port area.

SUCTION TUBE

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

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

OIL FILL SHUT OFF VALVE

4

724D-D66

HAND FILL PUMP

4. HYDRAULIC HAND FILL PUMP The hydraulic hand fill pump, located at the rear of the machine is used for adding oil to the hydraulic oil reservoir.

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

To add oil to the reservoir, rotate hand fill pump outwards, clean suction tube and remove cap. Open oil fill shut-off valve, insert end of suction tube into supply drum and operate the pump. The oil is pumped directly into the hydraulic reservoir via a return filter.

The pump should always be operated at a medium speed with steady motion. Pumping too fast may cause oil to by-pass oil filter.

ONLY THE PURIFIED AIR GOES TO THE AIR FILTER

TURBO II PRECLEANER OPERATION

EXHAUST PORT AREA

IMPORTANT: Close shut-off valve after filling and replace cap on suction tube.

218-21

2.22

PRECLEANER REAR VIEW

Tigercat 720D Feller Buncher 6

Controls and Operation

5

UNLOADER VALVE 724D-D49

AIR CLEANER UNLOADER VALVE

AIR CLEANER UNLOADER VALVE 724D-D13

AIR CLEANER AND PRECLEANER

This rubber valve on the tube of the air cleaner housing should be checked before every shift (8 hours). If this valve is missing, damaged or has turned hard, it will cause the air cleaner to become ineffective. The valve should suck closed at 1/3 throttle.

6. AIR CLEANER The air cleaner on this machine uses two filter elements; a primary element and a safety element accessible from the left side of engine.

This valve should be replaced every 1000 hours. Remove the unloader valve from the tube of the air cleaner housing. Check and clean the valve. A good valve is soft and flexible. If plugged, be sure to check the filter elements as they may need replacing as well.

Reattach the valve to the tube.

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

FILTER RESTRICTION INDICATOR

When operating in high dust conditions, the unloader valve should be checked and squeezed every 2 hours to release dust buildup.

197-11

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

FILTER RESTRICTION INDICATOR

A filter restriction indicator is mounted to the output side of the filter, this should show green when the engine is running at HIGH RPM. Service is required only if the indicator shows red.

2.23

Tigercat 720D Feller Buncher

Controls and Operation

CLEANING A/C CONDENSER, OIL COOLER AND RADIATOR

The A/C condenser core, engine radiator and oil cooler should be manually checked every 8 hours (every shift) or more often where conditions cause accumulation of twigs, leaves, pine needles and dust. All of the engine enclosure doors should also be checked.

The A/C condenser core is located on the left side of the machine and is mounted directly in front of the oil cooler and radiator. The crossflow fan is mounted on the right side of the machine. The cross-flow fan draws air from the left side of the machine through the door screen, the A/C condenser, the oil cooler and the engine radiator blowing it out of the right side of the machine.

CAUTION If using compressed air for cleaning, use at 30 psi. or less.

Always use personal protective equipment to guard against flying debris.

PROCEDURE: 1. Swing out the top screen door and lift out the bottom screen panel on the right and left sides of the front engine area, behind the cab.

720D-05

LEFT SIDE - A/C CONENSER AND OIL COOLER

CHECK A/C CONDENSER CORE 2. The A/C condenser swings out to access the back-side of the condenser and the front of the oil cooler and radiator for cleaning. It is held in place by two wingnuts.

724D-D12

This cooling assembly must be checked daily and may require thorough cleaning on a regular basis depending on operating conditions. Compressed air or water may be used for cleaning. Use personal protective equipment to guard against flying debris.

If an oil leak occurs in this area it should be thoroughly power-washed with a mild soap to ensure that all of the oil is removed. The presence of oil causes dust and dirt to cling to surfaces which will impair the reversible fan's ability to remove dust and dirt particles.

Care must be taken when cleaning this assembly, as the components can be damaged by careless handling and cleaning.

724D-D67

RIGHT SIDE - CROSS-FLOW FAN 2.24

Tigercat 720D Feller Buncher

Controls and Operation

USING THE FAN CLEAN (PURGE) FUNCTION TO REMOVE DEBRIS DURING OPERATION The hydraulic engine fan has a CLEAN (PURGE) function for use in cleaning debris from the radiator, oil cooler, A/C condenser and air intake door screens during operation. By reversing the flow of the fan, air flow is propelled in the opposite direction, thereby forcing dust and debris off the radiator, oil cooler, A/C condenser and air intake door screens. Ensure that there are no personnel standing directly to the left of the machine when performing this operation, as dust and debris will fly out. Refer to FAN-SWITCH in THIS SECTION for more information.

USING THE FAN SWITCH IN THE EVENT OF AN ENGINE COOLANT AND/OR HYDRAULIC OIL TEMPERATURE ALARM. In the event of an engine coolant temperature and/or hydraulic oil temperature alarm: 1. Stop the machine.

2. Place the fan control switch in the FULL ON position until cooling is achieved.

3. If necessary use the CLEAN (PURGE) function to reverse fan flow and clean debris from the radiator, oil cooler, A/C condenser and air intake door screens.

4. In severe operating conditions manual cleaning of debris may be required.

5. If the problem persists check engine coolant and/or hydraulic oil levels. Refer to OPERATING MACHINE ~ PRESTART CHECKS in THIS SECTION. 6. Return the fan control switch to AUTO and check for proper operation of the fan. In the event of a problem with the automatic control system the fan control switch should be placed in the FULL ON position while the machine is operating until the fan control can be properly repaired.

*NOTE: The fan switch on earlier machines was labelled PURGE/AUTO/OVERRIDE, on current machines it is labelled CLEAN/AUTO/FULL ON

2.25

Tigercat 720D Feller Buncher OPERATING MACHINE

Controls and Operation

If the machine has had a major service, a rebuild, or the hydraulic oil has been drained, refer to STARTUP PROCEDURE AFTER MAINTENANCE in SECTION 3 of THIS MANUAL.

DIPSTICK

Before operating the machine, follow the PERIODIC MAINTENANCE instructions in SECTION 3 of THIS MANUAL. Also, refer to the Engine Operator's Manual supplied with this machine.

PRE-START CHECKS:

76-6A

3. Check fuel level (Dipstick provided).

SAW SWITCH "OFF"

KEY SWITCH "OFF"

LEVEL GAUGE

718-D12

CHECK FUEL LEVEL

HIGH

KEY & SAW SWITCHES OFF LOW

1. Ensure key switch and saw switch are in the OFF position.

724D-D65

CHECK HYDRAULIC OIL LEVEL

4. Check hydraulic oil level, the level should be between the HIGH and LOW marks on the level gauge.

337-20

PARKING BRAKE ENGAGED POSITION

2. Check parking brake for proper operation and and set parking brake ON (ENGAGED).

2.26

Tigercat 720D Feller Buncher

Controls and Operation

OIL LEVEL DIPSTICK

720D-11

TRANSMISSION OIL LEVEL CHECK

CHECK ENGINE OIL LEVEL-CUMMINS

720D-15

CHECK TRANSMISSION OIL LEVEL

7. Check transmission oil level (dipstick).

OIL LEVEL DIPSTICK

720D-14

CHECK ENGINE OIL LEVEL JOHN DEERE

5. Check the engine oil level. The level of the oil must be between the ADD and FULL marks on the dipstick.

195-17

CHECK ENGINE COOLANT LEVEL

8. Check the engine coolant level.

WARNING

PUMP DRIVE GEARBOX DIPSTICK

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

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

720D-13

CHECK PUMP DRIVE GEARBOX OIL LEVEL 6. Check pump drive gearbox oil level (Dipstick provided)

724D-D12

CLEAN A/C CONDENSER, RADIATOR, OIL COOLER AND DOOR SCREENS

9. Clean A/C condenser, radiator, oil cooler and door screens.

2.27

Tigercat 720D Feller Buncher

Controls and Operation

UNLOADER VALVE 724D-D49

12. Check air cleaner unloader valve.

FUEL LINE WATER SEPARATOR

718-D14

AIR CLEANER UNLOADER VALVE

FILTER RESTRICTION INDICATOR

WATER SEPARATOR BOWL 216-2A

197-11

FILTER RESTRICTION INDICATOR

13. Check engine air cleaner restriction indicator.

DRAIN TAP

14. Be sure that all covers, guards and doors are securely fastened.

10. Drain water from fuel line water separator.

ENGINE AIR PRECLEANER

AIR CHARGE VALVE

PRESSURE GAUGE

724D-D13

196-9A

AIR CLEANER AND PRECLEANER

PRESSURIZED WATER SYSTEM

15. Check pressurized water tank pressure gauge, located on the left side of the seat base.

11. Check air intake pre-cleaner for foreign material build-up in air intake area or exhaust port area.

2.28

Tigercat 720D Feller Buncher

Controls and Operation

16. Check all of the fasteners retaining the disc saw teeth and tighten them to the proper torque level.

17. Replace all worn disc saw teeth or rotate worn teeth to align fresh cutting tips.

18. Replace the tooth fastener whenever replacing a saw tooth.

19. Inspect the cutting disc for stress cracks.

20. Check that the cutting disc does not wobble due to worn saw shaft bearings.

21. Never start or use a machine if the disc saw has missing teeth, missing teeth fasteners or a bent disc.

22. Shut down the machine immediately if you feel a vibration when the cutting disc is running.

23. Check that the saw housing is clear and undamaged.

2.29

Tigercat 720D Feller Buncher STARTING ENGINE:

Controls and Operation RESTARTING AN ENGINE THAT HAS RUN OUT OF FUEL

1. Ensure that PRE START CHECKS have been performed and that the area is clear of personnel prior to starting the engine.

If the engine runs out of fuel, the fuel line must be primed:

2. Sound horn to warn personnel of machine start-up.

1. Refill fuel tank completely.

2. Prime the fuel system using the primer pump on the fuel filter/water separator.

NOTE: The engine will not turn over unless the parking brake is ENGAGED.

3. Bleed the system according to engine manual procedures.

3. Move throttle control to the LOW IDLE position, and ENGAGE parking brake.

4. Crank engine until it starts. If it fails to start after 20 seconds, stop and wait for 2 minutes before trying again.

4. Press and hold the bulb test/engine start switch while turning the key switch to the START position to crank engine.

NOTE: It is necessary to press and hold the bulb test/engine start switch while turning the key switch to the START position to crank the engine. Refer to STARTING ENGINE in THIS SECTION.

5. When engine starts, release key key to RUN position. When the engine oil pressure rises above 10 psi, release the bulb test/engine start switch.

6. When engine starts, release key key to RUN position.

IMPORTANT

NOTE: If the engine does not start after three attempts, check the fuel supply system.

Absence of blue or white exhaust smoke during cranking indicates no fuel is being delivered.

To prevent damage to starter, do not engage starter motor for more than 15 to 20 seconds. Wait 2 minutes between each attempt to start the engine. If engine fails to start, refer to engine manufacturer OPERATOR'S MANUAL.

IMPORTANT After engine has started, keep engine speed low until engine oil pressure registers on gauge. If it does not register within 10 seconds, stop engine and investigate cause. Note that this machine is equipped with an automatic engine shutdown system which stops the engine immediately if engine oil pressure is below 10 psi.

NOTE: Do not use ether to restart an engine that has run out of fuel.

Allow a cold engine to warm up at LOW IDLE for at least five minutes before applying any load. Check all gauges often during the warm up period.

CAUTION Do not start engine by shorting across starter terminals. Start engine only from operator's seat.

If engine stalls while operating the machine, turn the key key to the OFF position and repeat steps (1) through (5).

2.30

Tigercat 720D Feller Buncher

Controls and Operation ETHER STARTING AID (OPTIONAL)

STARTING IN COLD WEATHER (WHEN APPLICABLE WITH OPTIONAL STARTING AID KIT) Cold temperatures may require the use of an optional engine block heater and hydraulic oil heater. The use of an ether starting aid may also be required.

TO INSTALL A NEW CAN OF STARTING FLUID: Clean the area around the valve before removing the canister. Loosen the band clamp that holds the empty canister, unscrew the can from the solenoid assembly and discard properly. Check the valve gasket under the cylinder and replace if damaged or missing. Remove the protective cap from the new canister of starting fluid and screw the can (hand tight) onto the solenoid assembly.

Retighten the band clamp to hold the can in place.

Preheating of hydraulic oil is recommended as standard procedure in cold weather.

IMPORTANT Cold start-ups can result in pump failure, refer to "HYDRAULIC OIL CHART" for recommended oil viscosities and temperature ranges.

IMPORTANT: To prevent dust from being drawn into the engine, leave a can in place on the solenoid assembly. A common cause of system failure occurs because dirt was allowed into the system when changing fuel canisters.

If an ether starting aid is being used; (a) Move throttle control to the IDLE position.

DANGER

(b) Crank engine with starter one or two revolutions before injecting starter fluid.

When working on this starting aid system always make sure that you are in a well ventilated area, away from heat, open flames or sparks.

The Ethyl Ether used in this system is extremely flammable, toxic, harmful or fatal if swallowed. Avoid contact with skin or eyes.

Do not breath the fumes. If swallowed, DO NOT INDUCE VOMITING. Call physician immediately.

If fuel enters eyes or fumes irritate eyes, they should be washed with large amounts of clean water for 15 minutes. A physician should be contacted.

NOTE: It is necessary to press and hold the bulb test/engine start switch while turning the key switch to the START position to crank the engine. Refer to STARTING ENGINE in THIS SECTION. (c) Momentarily depress ETHER push button switch, using short "bursts" while cranking the engine at the same time. Stop injecting fluid after engine starts. If engine begins to die during the first few minutes, inject another "shot" of fluid.

IMPORTANT

DANGER

To prevent damage to starter, do not engage starter motor for more than 15 to 20 seconds. Wait 2 minutes between each attempt to start the engine. If engine fails to start, refer to engine manufacturer operator's manual.

Do not store cylinders above 160°F. Do not incinerate, puncture or attempt to remove the center core valve or the side safety valve from the cylinder.

WARNING

(d) If the engine oil pressure does not register on the gauge within 15 - 20 seconds, stop the engine.

Ether starting fluid is highly flammable. Do not use near fire, sparks or flames. Read the warning label on the container.

Allow engine to run for approximately five (5) minutes or until engine coolant temperature gauge begins to register. (e) Before applying any load to the engine, proceed with MACHINE PREPARATION.

2.31

Tigercat 720D Feller Buncher MACHINE PREPARATION

Controls and Operation (l) Set the parking brake ON.

SYSTEM TEST AND WARM-UP

(m) Move the throttle control to the LOW IDLE position.

Before commencing harvesting operations, proceed with steps (a) through (n) to accomplish:

WARNING

Warm up the hydraulic system.

Ensure that the saw blade has stopped rotating before leaving the cab.

Test all systems for proper operation.

Inspect for hydraulic oil leaks.

(n) Leave the cab and visually check hose connections and cylinders for leaks. Check under the machine for oil leaks.

CAUTION If any system fails to respond to the controls, stop the warm-up procedure and call a mechanic, otherwise serious damage to pumps and other components could result.

WARNING

Assuming machine was parked on level ground at last shutdown:

Never use your bare hand to check for fluid leaks.

Fluid leaks undbber 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.

(a) Start engine. (b) Ensure gauges and warning lights are indicating normal operating conditions. (c) Check that all personnel are clear of the machine. (d) Raise throttle control to the MID position. (e) Slowly raise and lower boom, check for proper operation.

With the felling head raised slightly off the ground: (f) Operate the accumulator and clamp arms and check for proper operation. (g) Tilt the felling head forward and back and check that it is operating correctly. (h) Steer the machine to the left and right. (i) When cold weather conditions exist, continue the process of warming up the hydraulic system by repeating steps (e) through (h) several times. As the hydraulic system warms up, engine speed can be increased gradually to the HIGH IDLE position. (j) Turn saw on. (k) After completion of the warm-up and system testing, turn the saw OFF, stop the blade and rest the felling head on the ground.

2.32

Tigercat 720D Feller Buncher STOPPING ENGINE

Controls and Operation CARE OF THE MACHINE 1. Ensure that all fluid levels are always at the proper level. Use the preventative maintenance schedule in SECTION 3 of this manual .

IMPORTANT Stopping the engine immediately after it has been working under load can result in overheating and premature wear of the engine components. Follow the stopping procedure outlined below to allow the engine to cool.

2. Apply grease to all lubrication points at required intervals.

3. Do not apply load to a cold engine.

4. Close and secure all doors and access covers.

1. Park machine on level ground and rest felling head on the ground.

5. Do not allow branches, twigs, leaves or pine needles to build up around radiator intake doors or anywhere else on the machine.

Clean frequently.

2. Reduce engine speed to LOW IDLE and let run for approximately three minutes to allow gradual dissipation of heat and also to reduce turbocharger speed. This will also prevent loss of coolant by after boil and possible hot spot damage to the engine.

6. Be sure that the felling head is resting on the ground before servicing or parking the machine.

3. Do not race engine before shut-off.

7. Follow proper procedure for cleaning windows described in this section.

4. Engage parking brake.

5. Stop engine by turning key switch to the OFF position.

WARNING Before leaving the machine, park it in a safe position on level ground.

Engage parking brake, lower the felling head to the ground.

Never work behind, in front of, or below a machine that has been parked on a grade.

Take additional precautions by placing the wheels against a rock, tree or other secure object.

2.33

Tigercat 720D Feller Buncher

Controls and Operation

CLEANING INSTRUCTIONS FOR LEXAN WINDOWS (Windshield, skylight and three rear windows)

To remove wet paint, glazing compound or grease, rub lightly (not in direct sunlight) with a good grade of VM&P naphtha, isopropyl alcohol or butyl cellosolve (2-Butoxy Ethanol), then wash and rinse thoroughly. DO NOT USE GASOLINE. Gasoline or oil will cause uncoated LEXAN to become opaque. MARGARD coated lexan will start to become opaque around edges and creep in.

1. Rinse with lukewarm water.

2. Using a soft cloth or sponge, gently wash the sheet with a mild solution of soap or detergent and lukewarm water. DO NOT scrub or use brushes or squeegees.

3. Rinse with clean lukewarm water.

Removing Hairline Scratches Scratches and minor abrasions can be removed or minimized by using a mild automobile polish. Three such products that tend to polish and fill scratches are Johnson Paste Wax, Novus Plastic Polish #1 & #2, and Mirror Glaze Plastic Polish. It is suggested that a test be made on a sample of LEXAN sheet with the product selected and that the polish manufacturer's instructions be followed.

4. Dry thoroughly with a chamois or moist cellulose sponge to prevent water spotting.

Some Important Don ts DO NOT use abrasive or highly alkaline cleaners on LEXAN sheet products.

195-19

Never scrape LEXAN sheet products with squeegees, razor blades or other sharp instruments.

HINGED SIDE WINDOW SCREENS

Benzene, gasoline, oil, acetone or carbon tetrachloride should never be used on LEXAN sheet products.

SIDE WINDOW SCREENS The side window screens will swing out to allow access for cleaning the windows.

Screens are provided for the personal protection of the operator and must be reinstalled immediately after cleaning the windows.

DO NOT clean LEXAN sheet products in hot sun or at elevated temperatures.

Compatible Cleaning Agents Aqueous Solutions of Soaps and Detergents Formula 409 Freon T.F. Palmolive Liquid

CAUTION Be aware that the screen will swing outwards with considerable force, if the door is open or the machine on an incline.

Top Job Joy VM&P grade Naphtha Windex with Ammonia D

GRAFFITI REMOVAL (A) Butyl Cellosolve (For removal of paints, marking pen inks, etc.) The use of masking tape, adhesive tape or lint removal tools works well for lifting off old weathered paints.

(B) To remove labels, stickers, etc., the use of kerosene, VM&P Naphtha, or petroleum spirits is generally effective. When the solvent will not penetrate sticker material, apply heat (hair dryer) to soften the adhesive and promote removal. GASOLINE SHOULD NOT BE USED.

WINDOW SCREEN HAND KNOB

SIDE WINDOW SCREEN A hand knob is provided on both the inside and the outside. By unscrewing either (not both) of these knobs, the screen will be free to swing out on the hinges.

173-25

CLEANING INSTRUCTIONS FOR GLASS WINDOWS (Both doors) Normal window cleaning procedures are acceptable.

2.34

Tigercat 720D Feller Buncher

Controls and Operation

TOWING INSTRUCTIONS

STEERING CYLINDERS

A malfunction of the machine's equipment may make towing necessary.

STEERING CYLINDERS

Towing is only recommended over short distances. It is always better to make repairs at the point where the machine is parked whenever possible.

SM47

NORMAL HOSE CONNECTIONS

HOSES ON ONE CYLINDER CROSS CONNECTED FOR TOWING

cross hydraulic hoses on one of the steering cylinders. This will allow trapped oil to flow freely between the two steering cylinders, providing ease of turning with some dampening effect.

5. Remove articulation lock bar.

432-1

TRANSMISSION SHOWN ENGAGED

6. The machine will be towed from the rear, making use of the towing lug at rear of machine underneath the bumper.

1. To facilitate towing, the transmission must be placed in NEUTRAL, this will disconnect the wheels from the hydraulic motor.

Ensure a vehicle of equal power and size is used for towing.

2. Raise the felling attachment off the ground and install the boom cylinder lift lock. Turn off the engine.

When going downhill, be sure to use a holdback vehicle as the machine is now without any effective braking.

3. Install articulation lock bar.

7. When towing is completed, install articulation lock bar and reconnect steering cylinder hoses in proper location.

4. To allow the machine to steer while towing and prevent damage to the steering cylinders,

CAUTION Before towing, the transmission must always be placed in NEUTRAL. Never tow a machine in gear. The extremely high forces created will cause significant damage to the components of the hydrostatic drive system and the transmission.

Never tow the machine at over 2 mph. This will cause significant damage to the transmission.

Never press the forward or reverse pedals while the transmission is in neutral. This will cause significant damage to the transmission.

432-3

TRANSMISSION SHOWN IN NEUTRAL 2.35

Tigercat 720D Feller Buncher TRANSPORTING INSTRUCTIONS

Controls and Operation INSTALL ARTICULATION LOCK BAR

IMPORTANT When transporting the machine, Chains must be used to prevent forward, reverse and side to side movement of the machine.

••

The Feller Buncher may be transported with the wheels on or off. If the wheels are removed the machine must be blocked so that the center joint is one inch or more above the truck bed.

CHAIN LOCATIONS

352-11

CHAINS INSTALLED TO PREVENT

With the wheels on or off:

The felling head must be lowered to the truck bed.

The articulation lock bar must be installed.

HOOK CHAIN HERE OR HERE

IMPORTANT Do not secure the machine to the truck ANYWHERE near the center joint area as this can seriously damage the center joint.

VIEW OF FRONT CHAINS

FELLING HEAD RAISED FOR CLARITY

352-6

FOOT STEP

IMPORTANT

•

Use only transport regulation chains for this purpose, example; 5/16" grade 7 with a tensile strength of 96,000lbs/chain. Using inferior or damaged chains could cause the load to shift.

The machine must be crossed chained (side to side) at both the front and rear axle area.

352-2

The chains may be looped around the axles and hooked onto the frame in a suitable location (as shown) or the chains may be hooked back onto the links of the chain creating a full loop around the axles. At the rear, foot steps, if present, may be used as anchor points (see photo). The chains should be attached to the opposite sides of the trailer and evenly tensioned with the load binders.

2.36

VIEW OF REAR CHAINS

Tigercat 720D Feller Buncher ARTICULATION LOCK BAR

Controls and Operation

1. Position machine on level ground and steer machine into a straight ahead position.

2. Lower felling head to the ground, apply parking brake, stop engine and remove key key.

WARNING To prevent movement of machine and possible injury, install articulation lock bar before performing any work in the center joint area.

3. Remove both retaining pins from the front and rear chassis and slide lock bar out of front chassis and into tube socket on rear chassis.

Line up holes at each end of lock bar with holes in chassis' and secure in place with both retaining pins. Install lynch pins.

FRONT CHASSIS REAR CHASSIS

RETAINING PIN

LYNCH PIN

195-24

LOCK BAR

LOCK BAR IN LOCKED POSITION

4. After work is completed, slide lock bar into front chassis storage position and hold in place with retaining pin. Store second retaining pin in rear chassis tube socket.

Install lynch pins.

2.37

Tigercat 720D Feller Buncher

Controls and Operation LIFT BOOM CYLINDER LOCK Before performing work under the felling head or lift boom, ensure that the attachment is firmly supported on level ground, on solid stands or, install lift boom cylinder lock.

HELD IN POSITION WITH 'T' HANDLE

Completely raise lift boom and place lock over one of the two cylinder rods with the open side facing down and wide end against the keeper plate bolt heads. Install 'T' handle retaining bolt through center hole.

195-9A

Do not place yourself under the boom or felling head, while doing this. Do not damage the piston rod when installing the boom lift lock. Turn off the engine, turn key back to RUN position, press the PILOT RESET to activate the pilot oil system and SLOWLY lower the boom until the boom lift lock is securely in place. To remove the boom lift lock, start the engine, press PILOT RESET and raise the boom completely. Without placing yourself under the boom or felling head, remove the 'T' handle retainer bolt, remove the boom lift lock and secure it, wide end down, to the 'A' frame using the 'T' handle retainer bolt.

LIFT BOOM CYLINDER LOCK IN STORAGE POSITION LIFT BOOM

CYLINDER

••

'T' HANDLE

195-22

LIFT BOOM CYLINDER LOCK IN LOCK POSITION

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

Always install 'T' handle retainer bolt.

Use only to support boom and felling head.

Do not use to set hydraulic pressures.

2.38

Tigercat 720D Feller Buncher SECTION 3 - LUBRICATION & MAINTENANCE MARCH 2002

CONTENTS - SECTION 3 AIR CLEANER MAINTENANCE ................................................................... 3.14 AIR CONDITIONING SYSTEM, CHECKING ................................................ 3.18 BELT, ENGINE SERPENTINE, REPLACING .............................................. 3.23 CENTER JOINT LUBRICATION .......................................................................................... 3.19 MAINTENANCE ........................................................................................ 3.19 DRIVE SHAFT SPLINE LUBRICATION, MIDDLE AND REAR .................... 3.24 ENGINE SERPENTINE BELT, REPLACING ............................................... 3.23 FILTERS ENGINE AIR CLEANER ........................................................................... 3.14 FUEL FILTER/WATER SEPARATOR ...................................................... 3.10 FUEL TANK STRAINER ........................................................................... 3.11 HYDRAULIC OIL RETURN FILTERS ....................................................... 3.12 HYDROSTATIC CHARGE PUMP PRESSURE FILTERS ....................... 3.12 HYDRAULIC OILS .......................................................................................... 3.6 NEW MACHINE MAINTENANCE FIRST 50-100 HOUR INSPECTION AND SERVICE REPORT .................. 3.2 INITIAL PRE-DELIVERY INSPECTION ...................................................... 3.2 TIGHTENING POINTS ............................................................................... 3.2 OIL LOST FROM LEAKAGE .......................................................................... 3.2 PRESSURE SETTINGS ............................................................................... 3.28 PRESSURIZED WATER SYSTEMMAINTENANCE .................................... 3.16 REPLACING THE ENGINE SERPENTINE BELT ........................................ 3.23 SCHEDULED MAINTENANCE GENERAL ................................................................................................... 3.3 8 HOURS .................................................................................................... 3.4 125 HOURS ................................................................................................ 3.5 250 HOURS ................................................................................................ 3.5 500 HOURS ................................................................................................ 3.6 1000 HOURS .............................................................................................. 3.6 2000 HOURS .............................................................................................. 3.6 SEASONAL ................................................................................................ 3.6 STARTUP PROCEDURE AFTER MAINTENANCE ..................................... 3.20 TORQUE CHART ......................................................................................... 3.26 TORQUE CHART, GENERAL ...................................................................... 3.27 TRANSMISSION .......................................................................................... 3.19 CHECK OIL LEVEL .................................................................................. 3.19 WHEELS, INSTALLING ................................................................................. 3.2

Tigercat 720D Feller Buncher

Lubrication and Maintenance

PREVENTIVE MAINTENANCE SCHEDULE FOR 720D FELLER BUNCHER _______________________________________________________________________________________

NEW MACHINE MAINTENANCE *INITIAL PRE-DELIVERY INSPECTION:PERFORM THE INITIAL PRE-DELIVERY INSPECTION USING Tigercat FORM NUMBERS 5281 AND 5283; "PDI AND 50-100 HOUR INSPECTION REPORT"

*FIRST 50-100 HOUR INSPECTION AND SERVICE REPORT:WITH THE OWNER'S MECHANIC PRESENT, PERFORM AN INSPECTION AND SERVICE ACCORDING TO THE Tigercat FORM NUMBERS 5281 AND 5283; "PDI AND 50-100 HOUR INSPECTION REPORT" THIS MUST BE COMPLETED WITHIN THE FIRST 50-100 HOUR TIME FRAME. *IMPORTANT: TO QUALIFY FOR CONTINUED WARRANTY, THIS REPORT MUST BE COMPLETED AND RETURNED TO Tigercat Industries Inc. WARRANTY DEPARTMENT.

Tightening points for First 50-100 hour inspection report:~

IMPORTANT! Wheels:

All hydraulic connections

When installing wheels, ensure that all paint has been removed from the mating surfaces of both the wheel disc and the flange of the axle to ensure metal to metal contact.

Hose clamps Center joint pin securing bolts Transmission securing bolts Engine mounting bolts

For additional instructions also refer to section 8 of the service manual.

Pump drive gearbox securing bolts Axle mounting bolts

Hour meter ~ maintenance:

Wheel retaining bolts

Check the hour meter on a regular basis to determine your scheduled maintenance times.

Cab securing bolts Pin retainers

The intervals and times on the scheduled maintenance chart in this manual are for normal operating conditions.

Any other loose nut, bolt or fitting

If your machine is being operated in difficult or severe conditions, you should service your machine at shorter intervals.

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

_______________________________________________________________________________________

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

*OIL LOST FROM LEAKAGE

_______________________________________________________________________________________ LEAKAGE RATE ONE DROP IN 10 SECONDS ONE DROP IN 5 SECONDS ONE DROP PER SECOND THREE DROP PER SECOND DROPS BREAK INTO STREAM

3.2

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

Tigercat 720D Feller Buncher

Lubrication and Maintenance

GENERAL CAUTION All handles, steps and platforms must be kept free of grease, oil fuel, mud snow and ice and forest debris to prevent risk of personal injury.

Clean around filler caps before checking or adding fluids.

Before welding on machine be sure master switch is disconnected.

Release hydraulic pressures and clean around hydraulic fittings before breaking connection.

Plug or cap immediately.

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

Clean up spills as soon as possible.

Clean away all branches, bark and chips.

Clean up all traces of oil to avoid fires.

Always use clean hydraulic oil and filters.

Drain dirty oil while still warm.

Always have a fire extinguisher at hand.

Do not exceed recommended fluid levels.

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

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

For safety, when working under boom, always lower to ground, support properly or install lift boom cylinder locking device . (Refer to section 2 of this manual)

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

Clean up oil spills on walking surfaces and top of engine enclosure immediately.

______________________________________________

3.3

Tigercat 720D Feller Buncher

Lubrication and Maintenance

SCHEDULED MAINTENANCE EVERY 8 HOURS (EVERY SHIFT):~

Clean:~ Potentially damaging limbs or sticks from machine

Check engine oil level Drain fuel/water separator

Between air conditioner condensor and oil cooler/radiator

Check air intake precleaner, clean as required Check air cleaner unloader valve

Check:~ For leakage around hydraulic components and flexible hoses

Check engine air filter restriction indicator Check hydraulic oil level Check pump drive gearbox oil level with dipstick

For loose nuts, bolts and fittings

Check transmission oil level at dipstick

Water pressure gauge in cab (60 psi) for pressurized water system.

Condition and tension of accessort drive belt.

Lubricate axles ~ outer bearings ‡ 1 fitting, 4-places, lubricate until grease flows out past the outer seals. Do not use power greasers as it will damage the seals.

If the water system has been operated, refer to PRESSURIZED WATER SYSTEM MAINTENANCE in THIS SECTION for refilling and charging instructions.

‡ Under normal conditions every 125 hours.

Under adverse conditions, mud, water, snow etc. every 8 hours.

Conduct an overall visual inspection.

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

Lubricate mid drive shaft slip joint* 1-fitting, purge *Note: Lubricate mid drive shaft slip joint with machine articulated

______________________________________________

Lubricate front drive shaft support bearing, 1-fitting, purge Lubricate center joint bearings, 2-fittings, purge Lubricate steering cylinder ends, 4-fittings, purge Lubricate tilt and lift cylinder ends, 8-fittings, purge Lubricate lift boom and tilt linkage, 9 or 10 fittings, depending on felling head), purge

3.4

Tigercat 720D Feller Buncher

Lubrication and Maintenance

SCHEDULED MAINTENANCE EVERY 125 HOURS:~

Visually inspect for: Frayed electrical wiring and hydraulic hose

Perform 8 hour maintenance

Wear in any other components

And in addition:~ Lubricate rear axle pivot, 2-fittings, purge

Clean/replace: Air conditioner re-circulation filter Cab fresh air filter

• Lubricate rear drive shaft slip joint 1-fitting, purge Lubricate axles ~ outer bearings ‡ 1-fitting, 4-places, lubricate until grease flows out past the outer seals. Do not use power greasers as it will damage the seals.

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

______________________________________________

‡ Under normal conditions every 125 hours.

Under adverse conditions, mud, water, snow etc. every 8 hours.

EVERY 250 HOURS:~

Check: Engine coolant level

Perform 125 hour maintenance

Perform 8 hour maintenance And in addition replace:~ Engine oil and change oil filter

Air intake primary filter element, check restriction indicator at FULL rpm

Engine fuel filter

Fluid level in batteries unless maintenance free

Air intake primary element

Engine rpm.

Oil in pump drive gearbox

Hydraulic oil restriction indicator for boom/saw circuit with engine at FULL rpm

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

Hydraulic pump and motor securing bolts Check fuel tank filler screen Torque tightening points as per new machine maintenance

Continued on page 6

Proper operation of pressurized water system.

(Refer to PRESSURIZED WATER SYSTEM in SECTION 2 of the OPERATOR'S MANUAL and PRESSURIZED WATER SYSTEM MAINTENANCE in THIS SECTION) Visually check for damage to: Lift boom and tilt linkage Front and rear frame Center joint area Attachment Make repairs immediately

3.5

Tigercat 720D Feller Buncher

Lubrication and Maintenance

SCHEDULED MAINTENANCE Continued from page 5

EVERY 500 HOURS:~

EVERY 1000 HOURS:~

Perform 8 hour maintenance

Perform 8 hour maintenance

Perform 125 hour maintenance

Perform 125 hour maintenance

Perform 250 hour maintenance

Perform 250 hour maintenance

And in addition replace:~ Air intake safety element

Perform 500 hour maintenance

Hyd. Oil press. Filter, drive charge press. †

And in addition replace :~ Engine air cleaner unloader valve

Hyd. Oil press. Filter, fan drive charge press. †

Fuel intake strainer

Hyd. Oil return filter, trav./steer †

Strainer in accumulator charge valve

Hyd. Oil return filters, saw/boom †

Check:~ Motion between center joint lugs

Hyd. Oil return filter, pilot †

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

Check:~ All hydraulic pressures Transmission mounting, Check, re-torque

______________________________________________

EVERY 2000 HOURS:~

Parking brake lever in cab, apply WD-40 to both sides of slide and clevis pin

Perform 8 hour maintenance

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

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

______________________________________________

Perform 1000 hour maintenance And in addition replace:~ Oil in axles, front and rear Oil in hydraulic reservoir Water in pressurized water system Refer to diesel engine service manual and attachment manual for additional required maintenance at this scheduled time period. ______________________________________________

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

3.6

Tigercat 720D Feller Buncher

Lubrication and Maintenance

SCHEDULED MAINTENANCE SEASONAL:~ Drain and refill hydraulic oil tank and both front and rear axles with recommended hydraulic oil. See "approved hydraulic oils". Also see section 8 of the service manual for axle draining procedure.

Drain and refill pressurized water system.

(Refer to PRESSURIZED WATER SYSTEM in SECTION 2 of the OPERATOR'S MANUAL and PRESSURIZED WATER SYSTEM MAINTENANCE in THIS SECTION) ______________________________________________

APPROVED HYDRAULIC OILS In addition to providing the vehicle with its normal operational functions, hydraulic oil is also used to fill the axle assemblies, apply brakes and operate differential locks.

Wet disk brakes in the axles require oil with specific properties to ensure reduced chatter and ensure proper lubrication of mechanical components.

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

Chevron

Tractor hydraulic fluid (summer)

Citgo

Tractor hydraulic fluid (33-310) (summer)

Imperial

Esso hydraul 56 (summer) Hydraul 50 (low visc) (winter)

Shell

Donax TD (summer) Donax TDL (winter)

Sun

Sunfleet th fluid (summer)

John Deere

Type J20C (hy-gardtm) (summer) Type J20D (hy-gardtm) (winter)

3.7

Tigercat 720D Feller Buncher ATTACHMENT

4 FTG/8

Lubrication and Maintenance OUTER AXLE BEARINGS

22

4 FTG/8

26

1

16

4

7

8

23

6 5 14

12 13 15 20 STEER CYLINDERS

8 FTG/8

4 FTG/8

BOOM CYLINDER PINS

9 FTG/8

8 FTG/500

2 FTG/125

DOOR SCREEN HINGES

AXLE OSCILLATION

25

BOOM/LINK PINS

1

10 11

9

5 6 17

4 24 19 REAR DRIVE SHAFT

2 FTG/8

19

CENTER JOINT 3

2 FTG/8

21

23

18

1 FTG/125

MID DRIVE SHAFT & FRONT DRIVE PILLOW BLOCK BEARING

LEGEND *** 2 FTG/125

STEER MACHINE FULLY BEFORE GREASING MID DRIVE SHAFT SLIP YOKE. LUBRICATION POINT WITH A DESIGNATED NUMBER OF FITTINGS (2 FTG) AND HOURS BETWEEN SERVICING (125 ). JOINT TO BE PURGED.

†

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

LUB DIAG.PDF

3.8

CHK REP DRN D/R LUB

HOURS CHECK REPLACE DRAIN DRAIN AND REFILL LUBRICATE

Tigercat 720D Feller Buncher

Lubrication and Maintenance

Tigercat® Model 720D/724D SERVICE AND LUBRICATION POINTS REFER TO Tigercat OPERATOR'S MANUAL FOR FURTHER INFORMATION

COOLING SYSTEM

3

CENTER JOINT PIVOT

LUB

4

ENGINE OIL AND FILTER JOHN DEERE 6801 - 724D JOHN DEERE 6068 - 720B CUMMINS 'C' -724D CUMMINS 'B' -720D

CHK CHK CHK CHK

5

FUEL FILTER

6

FUEL WATER SEPARATOR

7 8

FUEL CAP SCREEN

CHK

30

QTY

USG

1000 $

500 $

250 $

125 $

8$

1

2000 $

SERVICE POINT NO.

ITEM

LITERS

CAPACITY

SERVICE EVERY

8

CHK

2

REP REP REP REP

1

DRN

1 CHK

INTAKE FUEL STRAINER

CHK

1

CLEAN OR REPLACE AS NECESSARY

1

DRAIN TANK, CLEAN OR REPLACE AS NECESSARY

9

AIR INTAKE PRECLEANER

10

AIR INTAKE PRIMARY FILTER ELEMENT

11

AIR INTAKE SAFETY FILTER ELEMENT

REP

1

12

HYDRAULIC OIL FILTER TRAVEL/STEER HYDRAULIC OIL FILTER BOOM/SAW HYDRAULIC OIL FILTER PILOT HYDRAULIC DRIVE CHARGE PRESSURE FILTER HYDRAULIC FAN DRIVE CHARGE PRESSURE FILTER PUMP DRIVE GEARBOX

REP V REP V REP V REP V REP V

1

CHK

D/R

4

1.1

18

TRANSMISSION

CHK

D/R

5.7

1.5

19

AXLES:

13 14 15 16

17

60/40 ANTIFREEZE (GM6035M SPEC.) CHECK MOTION BETWEEN CHASSIS LUGS SEE ENGINE MANUFACTURER'S MAINTENANCE MANUAL

26 6.9 19 5 19 5 14.2 3.75

REP

DESCRIPTION

CHK CHK REP

CHK

20

FRONT, 720D FRONT, 724D REAR, 720D/724D HYDRAULIC RESERVOIR

21

PARKING BRAKE

22

ATTACHMENT

LUB

23

PRESSURIZED WATER SYSTEM

CHK TEST

24 25

ACCUMULATOR CHARGE VALVE STRAINER A/C & HEATER FILTERS

26

OUTER AXLE BEARINGS

1

2

CHECK RESTRICTION INDICATOR ON INTAKE PIPE AT FULL RPM. CLEAN UNLOADER VALVE EVERY 8 HOURS. REPLACE VALVE EVERY 1000 HOURS.

CHECK RESTRICTION INDICATOR ON FILTER HEAD AT FULL ENGINE RPM

1 1 1 CHECK LEVEL WITH DIPSTICK. FILL WITH MIL-L-2105C OR API-GL-5 BELOW -10Fº(-23ºC) USE 75W-90 UP TO 100ºF(38ºC) USE 80W-90 ABOVE 100ºF(38ºC) USE 85W-140

D/R 34 9.0 D/R 50 13.2 D/R 28 7.4 D/R 227 60

CHK

DRAIN AND REFILL COMPLET SYSTEM ANNUALLY OR AS REQUIRED SEASONALLY. MUST MEET JOHN DEERE TYPE J20C (HY-GARD) SUMMER OR TYPE J20D (HY-GARD) WINTER

CHK LUB

REFER TO SECTION 2 OF OPERATOR'S MANUAL. APPLY WD-40 TO BOTH SIDES OF SLIDE AND CLEVIS PIN ON HANDLE. SEE ATTACHMENT MANUFACTURER'S MANUAL CHECK SYSTEM PRESSURE, 60 PSI REFER TO SECTION 2 OPERATOR'S MANUAL.

D/R REP

CHK

1 CLEAN OR REPLACE AS NECESSARY

LUB* LUB*

ALWAYS WITH A HAND GREASE GUN. LUBRICATE UNTIL GREASE FLOWS OUT PAST THE OUTER SEAL. * UNDER NORMAL CONDITIONS EVERY 125 HOURS, UNDER ADVERSE CONDITIONS (MUD, WATER, SNOW) EVERY 8 HOURS

720D-724D LUBCHART.XLS

3.9

Tigercat 720D Feller Buncher FILTERS - REMOVE AND REPLACE IMPORTANT Failure to service and replace filters at the proper intervals specified in the manufacturer's manuals, could cause damage to the machine and result in the product warranty becoming NULL and VOID. Check Tigercat parts catalog for replacement filters.

FUEL FILTER/WATER SEPARATOR The fuel filter/water separator is a combination unit, with a replaceable fuel filter and a removable water sediment bowl on the bottom of the unit.

The water sediment bowl is only replaced if it becomes damaged or non-functional. For service and replacement intervals see SERVICE AND LUBRICATION CHART in THIS SECTION.

Lubrication and Maintenance Changing the filter: 1. Park machine on level ground, install articulation lock bar, lower cutting head to ground, stop engine, pull parking brake ON and block wheels.

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

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

4. Wearing face protection (in case of a fuel squirt) turn OFF the fuel shut-off valve on the side of the fuel tank and unscrew the old filter.

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

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

7. Clean the water sediment bowl.

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

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

FUEL LINE WATER SEPARATOR

718-D14

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

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

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

13. Turn the fuel shut-off valve ON, start the engine and check for leaks.

WATER SEPARATOR BOWL 216-2A

DRAIN TAP

3.10

Tigercat 720D Feller Buncher

Lubrication and Maintenance

FUEL TANK STRAINER This is a stainless steel fuel strainer, screwed on to the inlet pipe of the engine fuel feed line inside at the bottom of the fuel tank.

Changing or cleaning the strainer: NOTE: This should only be required if excessive quantities of foreign material has built up inside the tank.

1. Park machine on level ground, install articulation lock bar, lower cutting head to ground, stop engine, pull hand brake ON and block wheels.

2. Drain the fuel tank. (plug in bottom) 3. Remove the round fuel tank cleanout cover plate and O ring from the access hole.

4. Before removing the strainer, clean any debris from the bottom of the tank and wipe it clean.

5. Remove the fuel strainer using the hex on the end of strainer. Carefully clean the strainer (it may be damaged by rough handling).

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

7. Reinstall the strainer using the hex on end.

8. Reinstall fuel tank cover plate with O ring.

9. Refuel and check for leaks. Start the engine and check for leaks again.

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

3.11

Tigercat 720D Feller Buncher

Lubrication and Maintenance

HYDRAULIC OIL RETURN FILTERS There are four full flow filters mounted on filter heads with built-in bypasses. Two are in the boom/saw return line, on a dual head. One is in the pilot return line and one is in the travel/steer return line. This travel/steer filter is colored blue indicating that it contains a water absorbing element. For service and replacement intervals see SERVICE AND LUBRICATION CHART in THIS SECTION.

6. The Tigercat spin-on filter element is supplied with two gaskets. The 720D uses the round ('O' ring style) section gasket for all four return filters. Discard the square section gasket.

TRAVEL RETURN FILTER WITH WATER ABSORBING ELEMENT (COLOR BLUE)

FILTER HEAD

GASKET

PILOT RETURN FILTER

FILTER ELEMENT FILTR_SEALS2

ROUND SECTION GASKET INSTALLATION

7. Remove used gasket and clean gasket seat in head.

8. Apply clean oil to new round gasket surfaces.

9. Install new round section gasket into inside lip of filter.

BOOM/SAW RETURN FILTER, DUAL HEAD

10. Screw on new filter until filter makes contact with filter head.

11. Tighten filter until top edge makes metal to metal contact with head. (Approximately 1 1/2 additional turns after gasket contact.

HYDRAULIC OIL RETURN FILTERS 724D-D02 Changing the filters:

12. Start the engine and check for leaks.

1. Park machine on level ground, install articulation lock bar, lower cutting head to ground, stop engine, pull parking brake ON and block wheels.

HYDROSTATIC CHARGE PUMP PRESSURE FILTERS

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

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

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

5. Check the seating area for the gasket on the filter head and wipe it clean.

There are two full flow filters mounted on filter heads with built-in bypasses. One is in the output side of the hydrostatic drive charge pump and the other is in the output side of the hydrostatic fan drive pump. For service and replacement intervals see SERVICE AND LUBRICATION CHART in THIS SECTION. Changing the filters: 1. Park machine on level ground, install articulation lock bar, lower cutting head to ground, stop engine, pull parking brake ON and block wheels.

IMPORTANT Contaminated hydraulic fluid can lead to premature failure of hydraulic components and costly repairs. Filters must be replaced at the recommended time intervals, Refer to SCHEDULED MAINTENANCE in THIS SECTION. Use of hydraulic oil filters other than the Tigercat brand could lead to severe wear and rapid failure of hydraulic system components.

3.12

Tigercat 720D Feller Buncher

Lubrication and Maintenance IMPORTANT HYDRAULIC FILTER SERVICING GUIDELINES NEVER PRE-FILL ANY HYDRAULIC FILTERS ON 200, 700, 800 AND 1000 SERIES MACHINES NEVER PRE-FILL CHARGE PRESSURE FILTERS ON 600 SERIES SKIDDERS Tigercat generally does not recommend the pre-filling of spin-on filters due to the risk of damage to the hydraulic system caused by unfiltered oil. Unfiltered oil used to pre-fill filters enters directly into the hydraulic circuit.

Contaminants in unfiltered oil can cause significant and costly damage to hydraulic valves, pumps and motors. The cleanliness of hydraulic oil cannot be guaranteed unless it is always prefiltered before use.

FAN DRIVE CHARGE PRESSURE FILTER LOCATED BEHIND REMOVABLE PANEL IN FAN DRIVE AREA

724D-D03

CHARGE PRESSURE FILTER HYDRAULIC FAN DRIVE

ALWAYS PRE-FILL DUAL HEAD HYDRAULIC FILTERS ON 600 SERIES SKIDDERS Dual head hydraulic filters on 600 series skidders must always be pre-filled with clean oil as noted specifically in the manuals for each of these machines.

All 600 series hydraulic circuits direct oil from the dual head filters to the main and drive pump inlets. Air must not be allowed to enter the inlets of these pumps. Entry of air directly into pump inlets can cause significant and costly damage to pumps. In this particular case the risk of damage to pumps caused by entry of air into the circuit is considered to be greater than the risk of damage caused by unfiltered oil.

Prefiltering of any hydraulic oil used to pre-fill these filters is strongly recommended to eliminate the risk of damage caused by unfiltered oil.

TRAVEL/STEER CHARGE PRESSURE FILTER LOCATED ON HYDRAULIC TANK WALL

CHARGE PRESSURE FILTER HYDROSTATIC DRIVE 2. Wipe clean the area around the filter and head.

724D-D01

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

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

5. Check the seating area for the gasket on the filter head and wipe it clean.

6. The new filter has an attached gasket. Apply hydraulic oil to the gasket surface.

7. Screw on the new filter until the gasket makes contact with the seat in the filter head.

8. Hand tighten filter an additional 1/2 turn only.

9. Start the engine and check for leaks.

3.13

Tigercat 720D Feller Buncher

Lubrication and Maintenance ENGINE AIR CLEANER

AIR CLEANER MAINTENANCE ENGINE AIR CLEANER

ENGINE AIR PRECLEANER

The air cleaner on this machine uses two filter elements; a primary element and a safety element accessible from the left side of engine.

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

FILTER RESTRICTION INDICATOR

UNLOADER VALVE

AIR CLEANER AND PRECLEANER ENGINE AIR PRECLEANER 724D-D13

The engine air precleaner cleans engine air before it reaches the air cleaner filter elements. It removes contaminants such as dust, powder, insects, rain and snow. This precleaner is self powered and self cleaning requiring virtually no maintenance. However, it should be checked periodically to make sure that foreign materials have not plugged the intake area or the exhaust port area.

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

197-11

FILTER RESTRICTION INDICATOR

A filter restriction indicator is mounted to the output side of the air cleaner. This should show green when the engine is running at FULL RPM. Service is required only if the indicator shows red.

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

UNLOADER VALVE

AIR CLEANER UNLOADER VALVE

AIR CLEANER UNLOADER VALVE

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

724D-D49

ONLY THE PURIFIED AIR GOES TO THE AIR FILTER

TURBO II PRECLEANER OPERATION

EXHAUST PORT AREA

This rubber valve on the body of the air cleaner housing should be checked before every shift (8 hours). If this valve is missing, damaged or has turned hard, it will cause the air cleaner to become ineffective. The valve should suck closed at 1/3 throttle.

This valve should be replaced every 1000 hours.

Remove the unloader valve from the tube of the air cleaner housing. Check and clean the valve. A good valve is soft and flexible. If plugged, be sure to check the filter elements as they may need replacing as well. Reattach the valve to the body.

When operating in high dust conditions, the unloader valve should be checked and squeezed every 2 hours to release dust buildup.

218-21

PRECLEANER REAR VIEW 3.14

Tigercat 720D Feller Buncher

Lubrication and Maintenance

In addition to the LUBRICATION AND MAINTENANCE SCHEDULE outlined in THIS SECTION, the following instructions should also be noted:

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

The most common and damaging servicing problems are:

2. Avoid dislodging dust from filter element(s) by gently pulling the element off the outlet tube.

OVER SERVICING

3. Check your old filter sealing surfaces, This will help detect foreign material on the sealing surface that is causing leakage.

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

PRIMARY OUTLET ELEMENT TUBE

SAFETY ELEMENT

ENGINE AIR PRECLEANER

724D-D13X

4. Always clean the inside of the outlet tube.

5. Always clean the sealing surface of the outlet tube before inserting a new filter element.

6. Inspect the new filter for damage.

NOTE: Filter elements should never be cleaned and reused. Cleaning causes dust to bypass the filter and be deposited on the inner surface of the filter media. The dust is then drawn directly into the engine.

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

AIR FILTER ELEMENTS

NOTE: This does not apply to hydraulic oil or diesel engine oil filters.

8. Check connections and ducts for an air tight fit. Ensure that all clamps, bolts and connections are tight. Check rubber elbows for splits or wear points. Leaks in these locations send dust directly to the engine.

SERVICING Engine exposure to dust during servicing is a large reason for engine damage due to dust.

Abrasive dust can easily enter the intake system once the air cleaner cover and protective filter element are removed for replacement. The safety element does reduce this risk but it should also be replaced at every third primary element change.

3.15

Tigercat 720D Feller Buncher

Lubrication and Maintenance

PRESSURIZED WATER SYSTEM MAINTENANCE

FILL & CHARGE PRESSURIZED WATER SYSTEM

OPERATION: Turn the hand operated ball valve (shut off valve) under the seat to the ON position to draw water from the 10.5 gallon pressurized holding tank at the rear of the machine. When not in use turn the water supply OFF at this valve and relieve the pressure in the rubber hose, under the operator's seat.

HOSE

a. Completely discharge all water and compressed air from the tank via the hose end nozzle.

CAUTION Never remove fill plug before depressurizing tank or injury may result. This fill plug incorporates a vent hole to release air pressure from the tank before the threads disengage. DO NOT replace this fill plug with any substitute.

WATER SHUT OFF VALVE (SHOWN CLOSED)

9

196-16A

b. Slowly unscrew fill plug two full turns. Any remaining air in the tank will be heard expelling from the special fill plug. Do not remove fill plug until all air has been expelled.

PRESSURIZED WATER SYSTEM CONTROL VALVE (UNDER SEAT)

The pressure gauge on the side of the seat should read 60 psi.

AIR CHARGE VALVE

TANK FILL PLUG

PRESSURE GAUGE

196-9A

PRESSURIZED WATER SYSTEM

718-D19

c.

SYSTEM TEST: This system should be tested once every month by turning the shut-off valve ON and expelling water from the hose end nozzle. A very forceful discharge of water should be obtained. If the water does not come out with force (with pressure gauge reading 60 psi) the system needs to be PURGED. Refer to PURGING PRESSURIZED WATER SYSTEM in THIS SECTION. After testing, the tank must be refilled and pressurized to 60 psi. Refer to the following FILL AND CHARGE procedure. This FILL AND CHARGE procedure should be carried out yearly.

PRESSURIZED WATER SYSTEM

Close water shut off valve and fill tank with water. (Tank capacity is approx. 10.5 gals.)

NOTE: When temperatures below 32°F are anticipated, add a Nontoxic R. V. Antifreeze or other suitable antifreeze solution to the water.

NOTE: Most Nontoxic RV Anti freeze solutions contain corrosion and algae inhibitors, it is therefore suggested that this solution be added to the water on a continual basis regardless of temperature conditions.

d. Install fill plug in tank. e. Charge water tank with compressed air by connecting an air hose to air charge valve on side of seat near the pressure gauge.

Pressurize to 60 psi as indicated on pressure gauge.

3.16

Tigercat 720D Feller Buncher

Lubrication and Maintenance

PURGING PRESSURIZED WATER SYSTEM Purging should be carried out whenever the flow of water does not forcefully discharge from the end of the hose with the pressure gauge reading 60 psi. a. Follow procedures (a) and (b) from FILL & CHARGE PRESSURIZED WATER SYSTEM and continue with: b. Close the water shut off valve and add 2 gallons of clean water to the tank. Reinstall the fill plug and charge the system with 60 lbs. of compressed air through the charging valve. c.

Open the shut off valve and completely discharge all the water in the tank via the hose end nozzle.

d. If a forceful discharge was not achieved, repeat the purging procedure. If a second purging does not work, remove lines and check for an obstruction. e. After the purging operation, fill and charge the system as described in FILL & CHARGE PRESSURIZED WATER SYSTEM in THIS SECTION.

3.17

Tigercat 720D Feller Buncher

Lubrication and Maintenance

CHECKING THE AIR CONDITIONING SYSTEM Any service work must be performed by authorized A/C technicians. The system should be charged with R134a refrigerant only. PAG (polyalkeylene glycol) oil should be present in the system and must be used on 'O' ring fittings during assembly.

IMPORTANT It is recommended that during cold weather when the A/C system is not in use, that it be run for a period of 5 minutes every 2 weeks. This will circulate oil to all components of the A/C system.

A/C SYSTEM TOTAL CAPACITIES PAG OIL R134a REFRIGERANT (polyalkylene glycol) 2.75 LBS.

CAUTION

7 OZ.

The compressor and charge valves are accessed from the right side engine compartment. The receiver drier is accessed from the compartment behind the right door, on the outside. The evaporator core is accessed on the right hand side of the machine just inside the cab door.

If using compressed air for cleaning, use at 30 psi or less.

Always use personal protective equipment to guard against flying debris.

Use this checklist to maintain system between service intervals. a. Check and adjust compressor drive belt tension. b. Check air intake filters and clean as required. c.

Check the condenser core for dirt and debris.

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

724D-D12

d. Check the evaporator core and the inside of the A/C housing for dirt and debris. Clean as required. e. Run air conditioning system for 3 - 5 minutes. f.

Check to see that compressor clutch will engage.

3.18

CHECK A/C CONDENSER CORE

Tigercat 720D Feller Buncher

Lubrication and Maintenance

CENTER JOINT

TRANSMISSION:

MAINTENANCE OF CENTER JOINT Maintenance in this area is usually limited to:

By carefully following these procedures, the service life of the transmission will be extended and costly down time will be avoided.

a) Regular lubrication of the two center joint grease fittings to purge the pivot bearings of debris and water. Refer to SERVICE AND LUBRICATION POINTS in THIS SECTION for lubrication intervals. Use only high quality, lithium based EP2 grease containing molybdenum disulphide.

For additional information, refer to TRANSMISSION in SECTION 8 of the SERVICE MANUAL.

TRANSMISSION OIL LEVEL CHECK

b) Visually checking the center joint pivot for looseness every 1000 hours. With an observer on the ground, keeping well clear of the center joint area, perform the following test to check for looseness of center joint.

1. Have operator lift the felling head off the ground and then rapidly raise and lower the head several times to "bounce" machine.

CHECK TRANSMISSION OIL LEVEL

720D-15

2. As machine bounces, check for motion between the front and rear chassis frame lugs. Also check for a "clunking" sound at the center joint area.

DIP STICK TUBE

TRANSMISSION

FILL PLUG

REAR CHASSIS

CHECK FOR MOVEMENT IN THIS JOINT AREA

FRONT CHASSIS

CHECK TRANSMISSION OIL LEVEL CHECK OIL LEVEL 724D-D09

Check oil level at end of every 8 hour shift.

724D-D11

1000 HOUR CHECK

3. Movement between front and rear chassis lugs or clunking of the pivot indicates a loose joint and preload must be checked.

Refer SECTION 11 of the SERVICE MANUAL for more information..

Procedure: Park on level ground, lower felling head, set parking brake on and turn off engine.

Clean dirt and debris from around oil dipstick and check oil level.

If required: add the recommended grade of oil through oil fill plug located on top of transmission housing.

Do not overfill.

3.19

Tigercat 720D Feller Buncher START-UP PROCEDURE AFTER MAJOR MACHINE MAINTENANCE

Lubrication and Maintenance

With the hydraulic tank vacuum pump switch in the OFF position, remove the breather assembly from the hydraulic tank and pressurize the hydraulic tank through this opening using air or nitrogen. To ensure that the hydraulic tank is not contaminated use a clean rag as a filtering device.

As the tank becomes pressurized the hydraulic oil will move up the suction tube and over into the supply lines. Air will begin to exit at the air bleed plug.

When a constant stream of oil without any air exits the suction tube replace the air bleed plug. Do not remove pressure from the tank until the air bleed plug is fully tightened.

Remove the pressure from the tank and reinstall the air breather assembly.

This procedure should be followed:

After major service or a rebuild.

Whenever the machine has been drained of hydraulic oil.

When any major component has been removed, repaired or replaced.

PRE-STARTUP AND FILLING 1. Check oil levels in the engine, the pump drive gearbox and the transmission.

2. Check coolant level in the radiator.

3. Do a final inspection of all fittings and clamps to make sure they are tight and will not leak.

4. Install the articulation lock bar and apply the parking brake.

NOTE: If the axles were drained of oil, refer to FILLING THE AXLES in SECTION 8 of THE SERVICE MANUAL.

5. Turn both differential lock switches to OFF. 6. Do not start engine. Purge air from hydraulic system as follows:

Fill the hydraulic tank if it has been drained.

Ensure all filters are in place.

Fill the drive and saw pumps with hydraulic oil through the case drain ports.

Remove the air bleed plug from the steel suction tube on the side of the oil reservoir.

BREATHER ASSEMBLY AIR BLEED PLUG

724D-D71

REMOVE THE AIR BLEED PLUG 3.20

Tigercat 720D Feller Buncher

Lubrication and Maintenance

MACHINE START-UP

CAUTION

Before beginning this procedure, perform the PRE START-UP AND FILLING steps.

NOTE: When the saw head is attached, re-torque all teeth (See saw manual). Attach the SAW BLADE GUARD and insert the SAW BLADE LOCKING PIN.

Machine operator must ONLY take directions from the person doing the set-up.

3. Crank engine for 3 seconds, wait for 5 seconds. Repeat 5 times to pump oil into pumps.

1. Ensure the articulation lock bar is installed.

NOTE: It is necessary to press and hold the bulb test/engine start switch while turning the key switch to the START position to crank the engine. Refer to STARTING ENGINE in SECTION 2 of the OPERATOR'S MANUAL.

UNPLUG ENGINE START SOLENOID

4. Reconnect wires on injector pump solenoid.

Do not start engine.

INSTALL A 0-1000 PSI. GAUGE AT M3 PORT.

DRIVE PUMP

DISCONNECT ENGINE START SOLENOID (CUMMINS SHOWN)

720D-08

724D-D06

UNPLUG ENGINE START SOLENOID

720D-07

DISCONNECT ENGINE START SOLENOID (JOHN DEERE)

DRIVE PUMP 'M3' TEST PORT CONNECTION

5. Install a 0-1000 psi. gauge on drive pump to check charge pressure at M3 port. Watch gauge closely during startup.

2. Disconnect the engine start solenoid (prevents engine starting).

PILOT PRESSURE RELIEF VALVE 675 PSI.

INSTALL A 0 - 1000 PSI. GAUGE ON "P2" PORT

PILOT PRESSURE REDUCING VALVE 550 PSI. 724D-D07

PILOT MANIFOLD

3.21

Tigercat 720D Feller Buncher

Lubrication and Maintenance

6. Start engine. If charge pressure does not rise within 20 to 30 seconds, TURN ENGINE OFF. If charge pressure is between 260 and 450 psi., run engine at IDLE for 20 minutes.

Check engine oil pressure in cab. Do not operate any functions.

20. At FULL throttle, operate all other functions for 2 minutes to flush circuits.

IMPORTANT Without a felling head attached, the tilt function can cause damage to the arms.

Watch the two LINK ARMS very carefully, as they may drop down beside the boom arms and wedge, causing the crank arms to bend.

When necessary, lower the boom DOWN, watching closely and tilt FORWARD, again watching the link arms closely.

7. Remove pressure gauge from 'M3' port.

8. Install a 0 - 1000 psi. gauge on pilot manifold. ("P2" on right side, quick connect fitting) 9. Turn pilot pressure reducing valve (far left end, top of pilot manifold) all the way IN until it is lightly seated.

10. Adjust pilot pressure relief valve (second from left, top of pilot manifold) using gauge and set to 675 psi. and lock.

CRANK, LINK AND BOOM ARMS

11. Using same gauge, reset pilot pressure reducing valve to 550 psi. and lock.

CRANK ARM LINK ARM

12. Remove pressure gauge from the pilot manifold.

STEER CIRCUIT MAIN RELIEF 2500 PSI.

•

BOOM ARM

192-21A

INSTALL A 0-5000 PSI. GAUGE

724D-D04

21. Top up the radiator with clean coolant. With cylinders fully retracted, top up the hydraulic oil reservoir with clean hydraulic oil.

STEER CIRCUIT MAIN RELIEF VALVE

NOTE: If the machine was on wheels, the steer and drive functions were not properly purged or flushed. Remove the articulation lock bar and at LOW IDLE, slowly operate the steer function right and left a few times.

With the parking brake released and at LOW IDLE, slowly operate the drive function forward and reverse a few times.

13. Install a 0-5000 psi. gauge on steer circuit main relief (quick connect fitting).

14. Set steer relief to 2500 psi. on gauge.

15. With engine at IDLE, parking brake ON, hold foot brake down, bleed brakes in rear axle.

16. Remove pressure gauge from steer relief valve.

17. Turn both differential locks ON and run engine at IDLE for 30 minutes to purge air and fill axles with oil (axles fill with leakage from diff. locks). If wheels have been removed, operate forward and reverse pedals very slowly to fill axles with oil.

NOTE: If possible, allow the machine to stand for 4 to 6 hours before setting any of the operating pressures. This will allow any air bubbles in the oil to escape and is a good time to check for leaks.

18. Set throttle to IDLE and run each BOOM function for 2 minutes to purge air from circuit.

19. Set throttle to FULL and run each BOOM function again for 2 minutes to flush circuit.

3.22

Tigercat 720D Feller Buncher

Lubrication and Maintenance

REPLACING THE ENGINE SERPENTINE BELT

4. Carefully slide the black rubber section of the coupler towards the fan pump. This will provide enough clearance to replace the serpentine belt.

In order to replace the engine serpentine belt it is necessary to disassemble the fan drive pump coupling.

SLIDE BACK THE RUBBER SECTION OF THE COUPLER TO CREATE A SPACE

SHOWN WITH FAN AND HOSES REMOVED FOR CLARITY SERPENTINE BELT

COUPLER

724D-D56

SLIDE BACK THE BLACK RUBBER SECTION OF THE COUPLER

FAN DRIVE PUMP 724D-D54

PASS BELT THROUGH SPACE CREATED BETWEEN THE COUPLER

REMOVING SERPENTINE BELT

1. Park the machine on level ground. Parking brake ON, felling head resting on the ground and engine off.

2. Disconnect the fuel solenoid to prevent engine from starting when "jogging" the engine.

UN-PLUG CONNECTOR

724D-D57

5. Replace the serpentine belt. Ensure that all of the ribs on the serpentine belt align with the grooves on the engine pulleys.

FUEL SOLENOID 724D-D55 DISCONNECT FUEL SOLENOID 3. Remove the (8) socket head bolts that hold the pump drive coupler together. NOTE: the engine will have to be 'jogged' to access all of the bolts.

BLACK RUBBER COUPLER

6. Reassemble the pump drive coupler, using the original bolts. Use loctite 242 (temporary) or equivalent. Torque all bolts to 8-10 lbf-ft using an opposing torque pattern.

7. Reconnect the fuel solenoid.

REMOVE THE (8) SOCKET HEAD BOLTS

724D-D58

REMOVE\REPLACE SERPENTINE BELT

REMOVE BOLTS 3.23

Tigercat 720D Feller Buncher

Lubrication and Maintenance

MIDDLE AND REAR DRIVE SHAFT SPLINE LUBRICATION

MIDDLE SLIP SPLINE LUBRICATION

When operating in extremely wet or dusty conditions or when the regular service schedule has been neglected, insufficient lubrication to the spline area of the middle drive shaft will result in premature wear. In addition old grease often forms into a semi-solid, rubber-like plug preventing the purging of contaminants (water, dirt, sand, etc.) through the slip spline seal.

3. Apply grease to grease nipple until new, clean grease appears at slip spline seal, FIG. 'A'.

GREASE GUN

NEW GREASE APPEARS AT SLIP SPLINE SEAL

The most common cause of joint and slip spline failure is lack of proper lubrication.

SLIP SPLINE LUBRICATION

FIG. 'A' MIDDLE DRIVE SHAFT SLIP SPLINE LUBRICATION If grease is going IN but not coming OUT at the spline location, check to see if grease is exiting from the relief fitting at yoke end of slip

1. Park machine on level ground, and steer fully to the right. Lower felling head to the ground.

Set parking brake ON.

724D-D52

2. Stop the engine and relieve trapped pressure from pilot system and brake accumulators by performing the following steps:

GREASE GUN

1. Close both doors. Turn key switch to ON position. Do not start the engine. Press pilot reset switch.

Complete either steps 2A or 2B. 2A.Fully apply brake foot pedal 50 times or more.

2B.Turn rear differential switch ON and hold front differential lock switch ON for 30 seconds. While waiting, pump brake foot pedal at least 10 times.

GREASE APPEARS AT RELIEF FITTING 724D-D51

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

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

FIG. 'B' MIDDLE DRIVE SHAFT YOKE END spline, FIG. 'B'. If so, cover the end of the relief fitting with a finger and continue to apply pressure to the grease nipple FIG. 'C'. If NEW GREASE APPEARS AT SLIP SPLINE SEAL

COVER RELIEF FITTING WITH FINGER

GREASE GUN

724D-D53

FIG. 'C' MIDDLE DRIVE SHAFT SLIP SPLINE LUBRICATION

grease pressure continues to exit from the relief fitting, remove the drive shaft and inspect for "hardened" grease build up, rust or other contaminants within the drive shaft. Repair or Replace drive shaft.

3.24

Tigercat 720D Feller Buncher

Lubrication and Maintenance

REAR SLIP SPLINE LUBRICATION 4. Apply grease to grease nipple until new, clean grease appears at the relief hole at yoke end of slip spline, FIG. 'D'.

GREASE GUN

GREASE APPEARS AT RELIEF HOLE 720C-01

FIG. 'D' REAR DRIVE SHAFT YOKE END 5. Cover relief hole with a finger and continue to apply pressure to grease nipple until new, clean grease appears at slip spline seal, FIG. 'E'.

GREASE GUN

NEW GREASE APPEARS AT SLIP SPLINE SEAL 720C-02

FIG. 'E' REAR DRIVE SHAFT SLIP SPLINE LUBRICATION

6. If grease does not appear at slip spline seal and continues to exit from the covered relief hole, remove the drive shaft and inspect for "hardened" grease build up, rust or other contaminants within the drive shaft. Repair or Replace drive shaft.

3.25

Tigercat 720D Feller Buncher

Lubrication and Maintenance

TORQUE CHART LOCATION

THREAD DIAMETER

Cylinders Pin bolts Piston nut, steer cyl.

Piston nut, boom/tilt cyl.

Gland, steer cyl.

Keeper plate bolts

TORQUE (LUBRICATED) lbf-ft Nm

3/4" UNC 1 1/4" UNF 1 1/2" UNF 3/4" UNC

282-310 930 1640 450 282-310

393-420 1282 2260 620 389-420

1/2" UNC 3/4" UNC

80-88 282-310

109-119 393-420

Engine mounting Bolts, mount to chassis Bolts, brackets to engine Bolts, bracket to pump drive

7/8" UNC M12-1.75 (10.9) 5/8" UNC

364 75 159-175

500 100 216-237

Pump drive gearbox Drive plate to flywheel Bell housing to CUMMINS engine

M10 x 1.5 (10.9) M10 x 1.5 (10.9)

32 32

43 43

1 1/4" x 18 UNEF 3/4" UNC

475-525 357

644-711 484

UNF UNF UNF UNF UNF

37 90 90 37 37

50 122 122 50 50

Axle mounting bolts Front Rear

7/8" UNC 3/4" UNC

364 226

500 310

Wheel bolts

7/8" UNF

500-550

679-745

Transmission housing to frame

7/8" UNC

364

500

Center joint bearing Bearing retaining bolts Pin retaining bolts

Drive shafts Yoke retaining nut, front shaft Pillow block retaining bolts Universal joint bolts Rear drive shaft to axle.

Rear drive shaft to trans.

Mid. drive shaft to trans.

Front drive shaft to Mid. drive shaft Front drive shaft to axle

3/8" 1/2" 1/2" 3/8" 3/8"

720D-TORQUECHART.XLS

3.26

Tigercat 720D Feller Buncher

Lubrication and Maintenance

GENERAL TORQUE SPECIFICATIONS

The torque values listed below are for general use only.

DO NOT use these values if a different torque value or tightening procedure is shown for a specific application.

IMPERIAL

GRADE 5 BOLTS

GRADE 8 BOLTS COARSE THREADS 1/4" - 20 5/16" - 18 3/8" - 16 7/16" - 14 1/2" - 13 9/16" - 12 5/8" - 11 3/4" - 10 7/8" - 9 1" - 8 1 1/8" - 7 1 1/4" - 7 FINE THREADS 1/4" - 28 5/16" - 24 3/8" - 24 7/16" - 20 1/2" - 20 9/16" - 18 5/8" - 18 3/4" - 16 7/8" - 14 1" - 12 1 1/8" - 12 1 1/4" - 12

DRY

lbf-ft Nm 11 - 12 15 - 16 20 - 28 27 - 38 44 -48 60 - 65 70 - 77 95 - 104 106 - 117 144 - 158 153 - 168 208 - 228 212 - 233 288 - 316 376 - 414 510 - 561 606 - 667 822 - 904 909 - 1000 1233 - 1355 1288 - 1417 1746 - 1921 1817 - 1999 2464 - 2710 DRY lbf-ft Nm 13 - 14 18 - 19 23 - 28 31 - 38 49 - 54 67 - 73 78 - 86 106 - 116 120 - 132 163 - 179 171 - 188 232 - 255 240 - 264 326 - 358 420 - 462 570 - 626 668 - 735 906 - 996 995 - 1096 1359 - 1486 1445 - 1590 1960 - 2155 2012 - 2213 2728 - 2997

LUBRICATED lbf-ft Nm 8 - 10 11 - 13 26 - 30 35 - 40 33 - 36 45 - 49 52 - 57 71 - 77 80 - 88 109 - 119 115 - 127 156 - 172 159 - 175 216 - 237 282 - 310 393 - 420 455 - 501 617 - 679 682 - 750 925 - 1016 966 - 1062 1310 - 1441 1360 - 1496 1844 - 2027 LUBRICATED lbf-ft Nm 10 - 13 14 - 17 18 - 25 25 - 33 37 - 41 50 - 55 58 - 64 79 - 86 90 - 99 122 - 134 128 - 141 174 - 191 180 - 198 244 - 268 315 - 347 427 - 470 501 - 550 679 - 745 746 - 821 1012 - 1113 1083 - 1191 1469 - 1613 1509 - 1660 2046 - 2250

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

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

METRIC

SIZE

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

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

M6 M8 M10

4.8 12 23

3.5 8.5 17

6 15 29

4.5 11 21

9 22 43

6.5 16 32

11 28 55

8.5 20 40

13 32 63

9.5 24 47

17 40 80

12 30 60

15 37 75

11.5 28 55

19 47 95

14.5 35 70

M12 M14 M16

40 63 100

29 47 73

50 80 125

37 60 92

75 120 190

55 88 140

95 150 240

70 110 175

110 175 275

80 130 200

140 225 350

105 165 225

130 205 320

95 150 240

165 260 400

120 190 300

M18 M20 M22

135 190 260

100 140 190

175 240 330

125 180 250

260 375 510

195 275 375

330 475 650

250 350 475

375 530 725

275 400 540

475 675 925

350 500 675

440 625 850

325 460 625

560 800 1075

410 580 800

M24 M27 M30

330 490 675

250 360 490

425 625 850

310 450 625

650 950 1300

475 700 950

825 1200 1650

600 875 1200

925 1350 1850

675 100 1350

1150 1700 2300

850 1250 1700

1075 1600 2150

800 1150 1600

1350 2000 2700

1000 1500 2000

M33 M36

900 1150

675 850

1150 1450

850 1075

1750 2250

1300 1650

2200 2850

1650 2100

2500 3200

1850 2350

3150 4050

2350 3000

2900 3750

2150 2750

3700 4750

2750 3500

ISSUE 3 800

3.27

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

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

Tigercat 720D Feller Buncher

Lubrication and Maintenance

PRESSURE SETTINGS

PRESSURE SETTINGS With hydraulic oil at operating temperature (120°F - 140°F) Loca tion

Pre ssure (PSI)

Engine RPM 2450 High Idle 900 Low Idle

Engine RPM Pilot Ma nifold Pressure Relief Valve Pressure Reducing Valve

675 550

1000 1000

Drive Pum p Charge Pressure Relief Valve Multi Function Valve: · P.O.R. Forward · P.O.R. Reverse · High Pressure Relief Forward · High Pressure Relief Reverse

350

1775

5050 5050 5500 Non-Adjustable 5500 Non-Adjustable

2450 2450

Drive Motor Drive Motor P.O.R. Loop flushing Pressure Relief

4050 360 Non-Adjustable

2450

3330 Non-Adjustable 205

1800 1800

Ste e r Va lve (Joystick Ste e ring Only Steer Valve Main Relief Steer Right Port Relief Steer Left Port Relief

2500 3200 3200

2450 1000 1000

Sa w Saw Valve Main Relief Saw Pump P.O.R.

3900 3650

1000 1000

Boom Va lve Mid Inlet Main Relief Tilt In Port Relief Tilt Out Port Relief Accumulator Clamp Open Port Relief Accumulator Clamp Close Port Relief Clamp Open Port Relief Clamp Close Port Relief Boom Lift Port Relief Boom Lower Port Relief

2600 2900 2900 3200 3200 1100 3200 2900 2200

2450 1000 1000 1000 1000 1000 1000 1000 1000

Fa n Pum p High Pressure Relief Forward and Reverse Charge Pressure Pressure Relief

ISSUE 1 1001

IMPORTANT NOTES: ~ Boom support must be used part# 4128A ~ W hen performing tilt out function, without a felling head installed, do not allow crank arms to hit boom

3.28