PDF Service Manual Tigercat H860C H870C LH870C Harvester - 3 MB
Maintain, troubleshoot, and repair your Tigercat harvester with this official service manual.
Covering the H860C, H870C, and LH870C models, this guide is packed with technical specifications and step-by-step procedures.
It's an essential tool for field technicians and shop mechanics to ensure the high performance and reliability of this advanced forestry equipment.
From hydraulics to electronics, this manual has you covered.
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--- Page 1 ---
SERVICE MANUAL
Tigercat H860C/H870C/LH870C HARVESTER
TABLE OF CONTENTS ISSUE 1.1 FEBRUARY 2007
SECTION
INTRODUCTION ................................................................................................................. ii
NON-APPROVED FIELD PRODUCT CHANGES .............................................................. iii
SAFETY ............................................................................................................................ 1
CONTROLS AND OPERATION ................................ See separate OPERATOR'S MANUAL
LUBRICATION AND MAINTENANCE ................................................................................. 3
HYDRAULIC SYSTEM/ LOAD SENSE CONTROL ............................................................ 4
PILOT SYSTEM ................................................................................................................. 5
ELECTRICAL AND COMPUTERS ...................................................................................... 6
ENGINE START AND STOP .............................................................................................. 7
ENGINE ANTI-STALL ......................................................................................................... 9
OIL COOLER/RADIATOR AND COOLING FAN ............................................................... 10
TRACK DRIVE ................................................................................................................. 11
BOOM FUNCTIONS ......................................................................................................... 12
LEVELLING ..................................................................................................................... 13
SWING ............................................................................................................................ 15
ATTACHMENT DRIVE ..................................................................................................... 18
HEAD ROTATE ............................................................................................................... 20
TELESCOPIC BOOM ...................................................................................................... 21
H860C H870C LH870C-SM00
H860C/H870C/LH870C HARVESTER Available Literature
Tigercat
®
Operator's Manual, English ............................. Part No. 25198A
Operator's Manual, Russian ............................ Part No. 30225A
Service Manual English(this manual) .............. Part No. 25199A Tigercat Industries Inc.
Service Manual, Russian ................................. Part No. 30226A P.O. Box 544
Parts Catalog .................................................... Part No. 25197A Paris, Ontario
Canada N3L 3T6
Tel: (519) 442-1000
Fax: (519) 442-1855
--- Page 3 ---
Tigercat H860C/H870C/LH870C Harvester Safety
Before moving the machine to the work site,
OPERATING check to ensure that all doors, panels, and
SAFETY PRECAUTIONS access covers are installed properly and secured.
CAB EXITS
There are three ways to exit the cab in case of an
emergency.
1. Front door, this is also the main point of
entry and is the only door that should be used
under normal operating conditions to enter or
leave the cab. This door is also equipped with
a SAFETY INTERLOCK SWITCH. See
SAFETY INTERLOCK SWITCH ON FRONT
Shut off engine when refuelling - DO NOT refuel the DOOR in THIS SECTION.
engine while smoking or near open flame or sparks.
2. Side door, should be used for emergency
Check that no other personnel have moved into a exits only. Do not use this door to routinely
hazardous area before starting the machine. enter or leave the cab. This door is not
Sound the machine horn before starting the equipped with a safety interlock switch and
machine. therefore when left open will not deactivate
the pilot controls in the cab. ALWAYS shut
The operator’s seat is equipped with lap and OFF engine before using the side door exit.
shoulder harness belts. Use both of these restraint
systems at all times when operating the machine. 3. Escape hatch, this is a third cab exit for use
if the side exit or front door exit become
blocked.
This hatch is not equipped with a safety
interlock switch and therefore when left open
will not deactivate the pilot controls in the cab.
ALWAYS shut OFF engine before using the
escape hatch exit.
It is important that the operator of the machine
be familiar with these emergency exits and how to
Start the engine according to the instructions in this use them.
manual. Refer to OPERATING MACHINE in
All three exits should be checked to make sure
SECTION 2 of the OPERATOR'S MANUAL.
that they are operational and will function in an
Never use a liquid staring aid to start an engine. emergency. The safety interlock mechanism on
the front door or the side door and escape hatch
retaining mechanisms must not be tampered with
or defeated.
WARNING
IMPORTANT
Unlock both doors before operating machine
to allow opening from the outside in case of
an emergency. Make sure that the doors are
THIS MACHINE IS EQUIPPED WITH A operational, open the doors twice, once
COMPUTER CONTROLLED HEATING ELEMENT using the exterior latch handle and once
IN THE ENGINE INTAKE SYSTEM. STARTING using the interior handle.
FLUIDS WILL EXPLODE ON CONTACT WITH
THE HEATING ELEMENT. For additional information, refer to EMERGENCY
EXITS in SECTION 2 of the OPERATOR'S
MANUAL.
1.7
--- Page 4 ---
Tigercat H860C/H870C/LH870C Harvester Safety
SERVICING SAFETY PRECAUTIONS
continued
WARNING
Diesel fuel or hydraulic fluid under pressure
can penetrate the skin and cause serious Explosive release of fluids from pressurized
personal injury, blindness, or death. If any cooling system can cause serious burns.
fluid is injected into the skin, it must be
surgically removed within a few hours by a Shut off engine. Only remove coolant filler cap
doctor familiar with treating this type of when cool enough to touch with bare hands.
injury. Slowly loosen cap to first stop to relieve pressure
before removing completely.
Never use your bare hand to check for fluid leaks.
Fluid leaks under pressure may not be visible. Do not change any pressure or relief setting
When searching for leaks, wear work gloves and unless Tigercat authorized instruction has been
use a wrench or piece of wood to move hydraulic obtained.
hoses. Do not grab hold of hydraulic hoses.
Wear safety goggles for eye protection. Use the proper tool for the job. Repair or replace
worn or damaged tools including lifting
equipment immediately.
Pressure can be maintained in a hydraulic system Keep your hands, feet, head, and loose clothing
long after the power source and pump have been away from power driven parts. Tie long hair
shut down. Lower the attachment to the ground, behind your head. Remove rings and other
stop engine and relieve trapped pressure before jewelry to prevent electrical shorts and
performing work on components, or disconnecting entanglement in moving parts.
any hoses. Refer to PARKING BOOM diagram Always be aware of machine pinch points that
(fig.5). Accumulators will self drain within 2 could cause injury. Never place body parts within
minutes of stopping the engine. the range of motion of the working parts of the
machine.
STICK CYLINDERS
FULLY EXTENDED Never stand under an object supported with
hydraulics. Always use safety stands or a locking
device.
•
TIP OF STICK
BOOM FULLY
SUPPORTED
860C-036 PARKING BOOM FIG.5
1.17
--- Page 5 ---
Tigercat H860C/H870C/LH870C Harvester Lubrication and Maintenance
GENERAL
Always have a fire extinguisher at hand.
CAUTION
For safety, always lower boom assembly to the
ALL HANDLES, STEPS AND PLATFORMS ground when leaving cab, leaving machine
MUST BE KEPT FREE OF GREASE, OIL, FUEL, unattended or during service.
MUD, SNOW, ICE AND FOREST DEBRIS.
Always install door safety struts when working
Clean around filler caps before checking or on machine.
adding fluids. Clean fire suppression system sensors.
Clean around hydraulic fittings before breaking
connection. Plug or cap immediately. CHECK EMERGENCY EXITS, MONTHLY:~
Two alternate exit routes are provided: side
Clean up all spills immediately. door emergency exit and escape hatch/
Always use clean oil and containers. emergency exit. These are only to be used if
the front door cannot be opened.
Drain dirty oil while still warm.
It is therefore essential that these emergency
Do not exceed recommended fluid levels. exits be checked at least once per month to
Service all hydraulic filters after the failure of a ensure they are fully operational.
pump, motor, cylinder or valve. Failures of this
Refer to EMERGENCY EXIT MAINTENANCE
nature could contaminate the entire hydraulic
GUIDE in SECTION 2 of the OPERATOR'S
system.
MANUAL for checking procedure.
Top up diesel fuel at each shift to reduce
contamination by condensation.
Before welding on machine, be sure to FIRE PREVENTION
disconnect all electrical connections and Maintaining your machine properly will greatly
follow all servicing safety precautions as extend its life and reduce your operating costs.
outlined in the WELDING, PRIOR TO of Fire can result in a machine loss which can be
SECTION 1 in THIS MANUAL. financially devastating.
When welding, secure ground connection as
close to working position as possible to CAUTION
prevent arcing across machined surfaces or
through bearings. AFTER transporting (trucking) a machine
from one job sight to the next, open all doors
Clean away all branches, bark and chips. and access panels and blow off any debris
Clean up all traces of oil to avoid fires. that could have re-positioned itself onto the
Inspect the EXHAUST SYSTEM DAILY for engine and exhaust parts due to wind
any signs of LEAKAGE. Check for worn, turbulence caused by the journey.
cracked, broken, or damaged pipes or muffler. 1. Pine needles and bark when allowed to
Also check for missing or damaged bolts or accumulate, form a fuel source that when
clamps. Should any exhaust leaks or defective ignited is extremely difficult to extinguish. A
parts be found, repairs must be made thorough program of regular cleaning and
immediately. Engine exhaust leaks can cause washing will reduce the possibility of a fire
fires, DO NOT OPERATE the machine until starting. In the event a fire does start, the
the exhaust leak is repaired. regular cleaning program will improve the
During daily operation of the machine, the chances of successfully extinguishing a fire.
occurrence of exhaust leaks are usually 2. Pay close attention to wiring and plumbing
accompanied by a change or increase in routings during maintenance, ensure that ALL
engine exhaust noise levels. These audible wiring harnesses or hydraulic hoses are
warnings cannot be ignored. Should any properly restrained and clamped to prevent
exhaust leaks occur during operation, the damage from chaffing.
machine must be shut down immediately and
not put back to work until the necessary Continued on page 4
repairs have been completed.
3.3
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Tigercat H860C/H870C/LH870C Harvester Lubrication and Maintenance
SWING DRIVE LUBRICATION
250
20065A R0
250
20065A R0
• ••
860C-032
860C-148A
LOWER BEARING GREASE FITTINGS LOWER BEARING GREASE FITTINGS
LUBRICATION OF SWING DRIVE GEARBOX CAUTION
LOWER BEARINGS
Do Not use a power grease gun to lubricate
The cavity in the lower portion of the gearbox this machine. Use a hand grease gun only.
where the two lower bearings are housed is
completely filled with grease.
Open the hydraulic pump compartment and locate
the lube fittings. Using a hand grease gun, pump 5
shots of grease into each grease fitting. DO NOT
OVERGREASE, make sure machine is warmed up
in winter or lower seal can be damaged. Follow the
lubricating procedure on the label located beside
the grease fittings and also refer to SCHEDULED
MAINTENANCE - 250 HOURS in THIS SECTION.
For additional information refer to SECTION 15 in
••
the SERVICE MANUAL. •
24
250
20065A R0
8
250
20065A R0
GEAROIL 860C-032
BOTTLE
•• SWING
DRIVE
SWING PINION & BEARING FITTINGS
• MOTOR
LUBRICATION OF SWING PINION AND SWING
BEARING
To lubricate the swing bearing, apply 10 shots
grease while swinging every 24 hours to one of
the two grease fittings located on the seat pedestal
MAIN
VALVE in the operator's cab. To lubricate the swing pinion
•• (or teeth) apply 10 shots grease every 8 hours
while swinging to the other grease fitting located
H860C-17 UPPER GEARING LUBRICATION on the seat pedestal. The grease fittings are
clearly labelled.
LUBRICATION OF SWING DRIVE GEARBOX
UPPER GEARING For lubrication schedule, refer to SCHEDULED
MAINTENANCE in THIS SECTION.
The swing gearbox upper gearing is filled with gear
oil. Use 75W-90 or 80W-140 synthetic gear oil. For additional information refer to SECTION 15 in
Follow the lubricating procedure on the label the SERVICE MANUAL.
located beside the gear oil bottle and also refer to
SCHEDULED MAINTENANCE - 250 HOURS in
SECTION 3 of THIS MANUAL.
For additional information refer to SECTION 15 in
the SERVICE MANUAL.
3.13
--- Page 7 ---
Tigercat H860C/H870C/LH870C Harvester Lubrication and Maintenance
HYDRAULIC OIL RETURN
STRAINERS/DIFFUSERS
•
•
1
860C-027
HYDRAULIC TANK CLEAN-OUT COVERS
8. Before removing the strainers, clean any
debris from the bottom of the tank and wipe it
clean.
9. Remove the three hydraulic oil return strainers
using the hex on the end of strainer. Carefully
clean the strainers (they may be damaged by
rough handling).
10. Check for a buildup of foreign materials
where the strainers screw onto the pipes and
cover plate.
11. Reinstall the strainers using the hex on end.
860C-029
RETURN TUBE STRAINER/DIFFUSERS 12. Reinstall access cover plates with NEW “O”
rings.
There are three reusable strainers/diffusers on the 13. Add hydraulic oil to tank using fill pump.
return tubes. The strainers should be inspected
whenever the hydraulic tank is drained. See 14. Bleed air from the main pump, attachment
SCHEDULED MAINTENANCE in THIS SECTION. pump and fan valve by removing the case
drain hoses at each pump connection. Install
For service and replacement intervals see plugs in hose ends.
SERVICE AND LUBRICATION CHART in THIS
SECTION. 15. Continue filling hydraulic tank using fill pump.
Reconnect case drain hoses to pumps when
CHANGING OR CLEANING THE STRAINER: oil is seen coming from the pump case drain
This should be performed in the event of a ports. It is important that all air is evacuated
pump failure or hydraulic oil contamination. from the pumps.
1. Park machine on level ground with attachment 16. Fill hydraulic tank up to FULL mark on sight
resting on the ground. gauge using fill pump.
2. Position upper frame to allow access to the 17. Recheck oil level and add hydraulic oil up to
drain plug in the bottom of hydraulic reservoir. FULL mark using fill pump.
3. Stop engine. NOTE: Changing strainers and filters and
4. Open service enclosure doors and install replacing the hydraulic oil tends to aerate the oil.
safety strut. For maximum pump life, the machine should sit for
1 hour after servicing to allow entrained air to
5. Turn BATTERY DISCONNECT SWITCH to the escape from the oil prior to applying working
'OFF' position. pressures to the pumps.
6. Drain the hydraulic tank via a drain plug in the
bottom of the tank.
7. Remove the round access cover plates (1) and
'O' rings.
3.23
--- Page 8 ---
Tigercat H860C/H870C/LH870C Harvester
SECTION 4 - HYDRAULIC SYSTEM
OCTOBER 2006
CONTENTS - SECTION 4
CASE DRAIN STRAINERS ...................................................................................................................... 4.4
FILTERS, HYDRAULIC OIL
FILTER SERVICE NOTE ..................................................................................................................... 4.5
HYDRAULIC OIL PRE-FILL FILTER ................................................................................................... 4.9
RETURN FILTERS ............................................................................................................................... 4.5
STRAINER SERVICE NOTE ................................................................................................................ 4.6
VENT/BREATHER ................................................................................................................................ 4.5
HIGH PRESSURE LIMITING CONTROL VALVE
SET LOAD SENSE RELIEF VALVE .................................................................................................. 4.29
HYDRAULIC OIL TANK
DESCRIPTION ..................................................................................................................................... 4.4
OIL LEVEL SIGHT GAUGES ............................................................................................................... 4.5
VENT/BREATHER ................................................................................................................................ 4.5
HYDRAULIC PUMPS
ATTACHMENT PUMP ............................................................................. 4.11. SEE ALSO SECTION 18
FAN PUMP .............................................................................................. 4.11. SEE ALSO SECTION 10
MAIN PUMP ........................................................................................................................................ 4.10
MAIN PUMP WEAR TEST ............................................................................................................. 4.10
HYDRAULIC SYSTEM OPERATION
ATTACHMENT CIRCUIT ...................................................................................................................... 4.3
CIRCUIT DESCRIPTION ................................................................................................................... 4.17
COOLING FAN CIRCUIT ..................................................................................................................... 4.3
FLOW ON DEMAND AND LOAD COMPENSATION ........................................................................ 4.17
HYDRAULIC SYSTEM OPERATION
TRACK DRIVE SYSTEM .................................................................................................................. 4.2
MAIN HYDRAULIC SYSTEM ............................................................................................................... 4.2
BOOM ............................................................................................................................................... 4.2
LEVELLING ...................................................................................................................................... 4.2
SWING .............................................................................................................................................. 4.2
TRACK DRIVE .................................................................................................................................. 4.2
MARGIN PRESSURE ......................................................................................................................... 4.11
MARGIN PRESSURE, SET ............................................................................................................... 4.27
PILOT CIRCUIT .................................................................................................................................... 4.3
PRESSURE GAUGE CONNECTIONS .............................................................................................. 4.28
LOAD SENSING
BASIC DESCRIPTION ....................................................................................................................... 4.13
BASIC PRINCIPLES .......................................................................................................................... 4.12
OPERATING TIPS .............................................................................................................................. 4.15
SET LOAD SENSE RELIEF VALVE .................................................................................................. 4.29
SET MARGIN PRESSURE ................................................................................................................. 4.27
MAIN CONTROL VALVE/MANIFOLD
CONTROL SPOOL SECTIONS ......................................................................................................... 4.18
CONTROL VALVE SECTIONS .......................................................................................................... 4.19
CONTROL VALVE SPOOL OPERATION .......................................................................................... 4.21
HIGH PRESSURE LIMITING CONTROL VALVE .............................................................................. 4.26
MAIN CONTROL VALVE DESCRIPTION .......................................................................................... 4.18
PORT RELIEF AND ANTICAVITATION VALVE ................................................................................ 4.20
ADJUSTING PROCEDURE ........................................................................................................... 4.20
SWING AND DRIVE MOTOR SPOOL SECTIONS ........................................................................... 4.18
PRESSURE AND SPEED SETTINGS ................................................................................................... 4.30
SCHEMATIC DIAGRAMS
HIGH PRESS. LIMITING CONTROL ................................................................................................. 4.26
LOAD SENSING (FLOW ON DEMAND) ........................................................................................... 4.12
LOAD SENSING SYSTEM CIRCUIT DIAGRAM ............................................................................... 4.16
MAIN PUMP ........................................................................................................................................ 4.10
MAIN VALVE WITH HIGH PRESS. LIMITING CONTROL ................................................................ 4.19
--- Page 9 ---
Tigercat H860C/H870C/LH870C Harvester Hydraulic system
4 With the engine at high idle, simultaneously NOTE: If the machine controls are not responding
hold the boom OUT control and hold the as they should, i.e. boom is jerky or sluggish, the
SWING CONTROL fully over relief. margin pressure setting may be out of
adjustment.
5 Record the flow coming out of the main pump
case drain. Also refer to ENGINE ANTI-STALL in SECTION 9
of THIS MANUAL.
Normal/acceptable case drain leakage rates
for the main pump under the above conditions 'P' GAUGE L.S. GAUGE
HIGH TEST CONN. TEST CONN.
is 5 GPM to 8 GPM. With case drain leakage PRESSURE
LIMITING
rates greater than 9 GPM, the pump will still CONTROL
operate properly but should be considered for
replacement.
••
MARGIN •• ••
MAIN
PRESSURE PUMP
ADJUSTING
SCREW
••
•• ••
ENGINE MAIN VALVE
ANTI-STALL MANIFOLD
SOLENOID
VALVE
5 HIGH PRESSURE
•• 860C-035 LIMITING CONTROL