PDF Service & Repair Manual Tigercat Axles - 1 MB
This service and repair manual provides detailed instructions for maintaining and overhauling Tigercat axles.
It is a critical resource for technicians working on these robust, purpose-built components.
The manual includes specifications, torque values, and step-by-step procedures to ensure repairs are performed to factory standards.
Proper axle maintenance is key to the reliability of your Tigercat forestry equipment.
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--- Page 1 ---
AXLES
SERVICE AND REPAIR MANUAL
ISSUE 2.0, DECEMBER 2018
Tigercat Industries Inc.
P.O. Box 637
Brantford, Ontario
Canada N3T 5P9
Tel: (519) 753-2000
Fax: (519) 753-8272
--- Page 3 ---
Tigercat Axles Introduction
ITEM PART DESCRI PTI O N ITEM PA R T D E S C R I P T I O N
1 KIT, BRAKE, SAHR W/BUSHING 10 SPACER
2 HOUSING, BRAKE 11 PIN, SPRING
3 SHAFT, AXLE 12 SHIM
4 PLUG, MAGNETIC 13 DIFFERENTIAL, OSCILLATING
5 O-RING 14 PLANETARY
6 BOLT 15 SHIM
7 WASHER 16 SHIM
8 BOLT 17 SHIM
9 WASHER
xi
--- Page 4 ---
Tigercat Axles Safety
LIQUID NITROGEN WORKING WITH OIL
Direct contact with oil implies a risk of skin complaints
WARNING such as eczema, for example. Strict hygiene should
Only workers trained in handling liquid nitrogen always be observed.
may do so. See the MSDS or PSDS for proper Other safety advice includes:
handling and storage of liquid nitrogen. Do not
attempt to use liquid nitrogen until you have • Oil used in this machine may be hot enough to
received proper training. cause serious burns.
• Avoid contact with oil, particularly heated oil.
Liquid nitrogen is used to shrink-fit bearing races,
bushings, pins, shafts etc. It is extremely dangerous if • Wash off oil on the skin immediately with soap and
not handled properly. water.
• Wear protective gloves. Hands should be clean
VENTILATION
before putting on gloves. Apply protective cream to
the hands to make washing easier.
WARNING • DO NOT put oily rags in your pockets.
Do not burn discarded items except in an • Change oil soiled clothing as soon as possible.
approved incineration process. Burning such • Keep an extra change of work cloths nearby.
items creates hazardous fumes. • Attend to cuts and abrasions immediately. Clean
them and apply first-aid.
• DO NOT breath in oil fumes.
• Wash hands and arms frequently (example: at each
meal break or as often as possible).
COMPRESSED AIR
Compressed air is a concentrated, high pressure, high
speed stream of air that can seriously injure or kill. Air
pressures of 5 – 10 psi can cause serious injury. Most
Hazardous gases, fumes and vapours are the by- pneumatic tools operate at 80 – 120 psi.
products of internal combustion engines, solvent and
cleansers. Verify your work area is adequately ventilated Follow acceptable Health and Safety protocols for using
and utilize appropriate PPE as required. compressed air.
• Work in a ventilated area. Provide sufficient • DO NOT clean clothing or skin using compressed
ventilation to prevent the build-up of toxic exhaust air.
fumes. If indoors, use exhaust extensions to the
• Verify the air stream is not aimed at a fellow worker
outdoors or open the shop doors. Run the engine
or positioned in a way to cause debris to strike
only when it is necessary for testing or adjustments.
someone or other equipment.
• Use a chip guard.
• Air pressure of 30 psi (at the nozzle) is permitted to
dry objects.
1.5
--- Page 5 ---
Tigercat Axles Disassembly
SAFETY PREPARING TO DISASSEMBLE THE AXLE
See, SAFETY on page 1.4 for references to safety
warnings and messages. WARNING
MACHINE ORIENTATION Axles and axle components are heavy. Use
appropriate lifting devices. Support and brace
A B C B A major components so they DO NOT fall or roll.
When removing one major component from
another ensure that both components are
adequately supported and level.
See, MATERIAL LIFTING AND HANDLING on page 1.8
See, PERSONAL SAFE LIFTING AND CARRYING on
page 1.9.
D
See,SAFE SUPPORT OF COMPONENTS on page
C00376
1.9.
A Planetary
B Brake (optional) See,CLEAN AND INSPECT on page 1.11.
C Differential
D Yoke
Service the axle or components on a clean, robust work
surface or on a floor or section of ground. The work area:
• Must be level
A B C
• Must be clean
• Have a barrier (tarpaulin or sheets of plywood) on
the ground if not in a workshop.
F
• Must have components blocked to eliminate
movement
MOVING AXLES/AXLE COMPONENTS
Axles may be shipped as complete units or partially
disassembled.
A B C D
E D
C00377
A Bogie Arm
B Brake Housing
C Differential
D Planetary
E Yoke
F Slew Bearing
References to left or right of the axle or bogie axle are
based on viewing the axle with the differential yoke
facing the observer. C00382
A Lifting Strap
B Planetary
C Brake Housing
D Differential
2.3
--- Page 6 ---
Tigercat Axles Disassembly
DISCONNECT BOGIE ARM FROM SLEW
BEARING
E F A
C00463
D C B
A Use indicated ports for SAHR brake retraction
C00392
1. Release the parking brakes if SAHR (Spring
Applied Hydraulic Release) brakes are present. This A Differential
activity may require two persons; one to activate oil B Bolts
C Slew Bearing
pressure, the other to remove the axle. If there are
D Bogie Arm (with axle shaft removed)
no brakes, or service brakes only, proceed to
E Slew Bearing Mounting Surface
step 10. F Oil Seal
a. Refer to the associated machine service manual MARK THE ALIGNMENT OF THE SLEW BEARING
to determine which ports on the axle must be BALL PORTS RELATIVE TO THE BRAKE HOUSING
energized to release the brakes. AND THE BOGIE HOUSING.
b. Install an M14 input fitting suitable for use with 1. Brace components with stands or wooden blocks
the available oil supply system into the port or cinch lifting straps to the bogie mounting housing
indicated in the machine service manual. and tension them in preparation to support and
move the housing. See, MOVING AXLES/AXLE
c. Connect the oil supply to the fitting and activate COMPONENTS on page 2.3.
the oil pressure to retract the SAHR brake.
2. Attach lifting rings to the lifting plates on the bogie
2. Remove the axle shaft from the differential. arm if using a lifting device.
Left and right axle shaft 3. Verify that the bogie axle shaft for the side of the
a. Pull the shaft straight out, perpendicular to the bogie being serviced has been removed. See, AXLE
differential. DISASSEMBLY on page 2.7
Left axle shaft only 4. Remove the bolts from the slew bearing:
b. Verify that a shaft spacer, shims and spring pin a. Remove bolts from the top half of the slew
are secured to the long spline end of the left axle bearing that secure it to the bogie arm.
shaft. These components must be accounted b. Leave two bolts horizontally opposed in the slew
for during disassembly. If they remain in the bearing.
differential they will cause severe damage to the
differential. c. Remove the bolts from the bottom half of the
slew bearing.
3. Repeat steps 1 to step 10 for the right side bogie
axle shaft. 5. Remove the two remaining bolts from the slew
bearing.
4. Cinch lifting straps and tension them in preparation
to support and move the bogie housing. See, 6. Move the bogie arm perpendicular to the differential
MOVING AXLES/AXLE COMPONENTS on page using a lift or pry bars. The bogie mounting plate
2.3 . must clear the end of the slew bearing. DO NOT tip
the bogie arm over.
7. Follow step 1 to step 6 to remove the other bogie
arm.
2.13
--- Page 7 ---
Tigercat Axles Assembly
INSTALL BRAKES
A B C D E F G H J
U
T
S
R Q P N M L K
C00394
Service Brakes
A Differential F Brake Piston
B Inner Backup Ring G Reaction Plate
C Inner Square O-ring H Friction Plate
D Outer Square O-ring J Piston Return Spring
E Outer Backup Ring
SAHR (Spring Applied Hydraulic Release) Brakes
K SAHR Brake Rod Seal Q SAHR Brake Piston Seal
L SAHR Brake Piston R SAHR Brake Thrust Washer
M Bolt S Belleville Washers
N Washer T SAHR Spring Retainer
P Brake Housing U Bolts
Tigercat axles may be built without brakes, with service
brakes, or with service brakes and SAHR brakes.
If the axle being serviced does not come equipped with
brakes, proceed to INSTALL BRAKE HOUSING/AXLE
HOUSING on page 3.13.
3.5
--- Page 8 ---
Tigercat Axles Assembly
4. Apply a light coat of grease to the scraper ring, and 7. Clean bolts with isopropyl alcohol, then apply Loctite
scraper ring groove on the slew bearing, then insert Thread Locker 242 and Loctite 7649 Primer to each
the scraper ring in the groove of the slew bearing. bolt. See, APPLYING LOCTITE PRODUCTS on
The large rib on the scraper ring faces out towards page 1.12.
the brake housing.
8. Seat the slew bearing against the brake housing/
5. Apply a light coat of oil to the O-ring then install the chassis. Verify the correct orientation, then thread
O-ring on the brake housing. The O-ring must not be bolts finger tight. Torque each to 560Nm (405 lbf-ft)
twisted. in a star pattern.
NOTICE
Align slew bearings on each side of the axle in
the same direction and orientation.
G A B
F
E
C
D
C00466
A Slew Bearing
B Bogie Arm
C Oil Seal (Grease is NOT permitted to seep from this oil seal)
D Brake Housing
E O-ring
F Scraper Ring
G Internal Seal
6. Align the slew bearing for mounting on the chassis
or brake housing:
a. Position the slew bearing with the scraper ring
and O-ring facing the axle/brake housing.
b. Align the marks made on the slew bearing and
the brake housing at the time of removal. Align
the slew bearing on the bogie arm:
c. Align the slew bearing as described in step 1.
The port may or may not align perfectly along
the vertical axis. If the ball port on one slew
bearing is slightly off centre with the ball port,
ensure that the other ball port is off centre in the
same direction and by the same amount.
3.15
--- Page 9 ---
Tigercat Axles Assembly
4. Verify that the planetary is correctly prepared for INSTALL TRUNNIONS
installation to the bogie arm.
INSTALL TRUNNION PIN
a. Verify that planetary retaining rings are present.
b. Verify that centre retaining ring is present.
A
5. Raise the planetary using a lifting device, then lower
it onto the guide pins until the planet gears and sun
gear almost meet. B
6. Align the sun gear teeth and the planet gear teeth,
then lower the planetary. Use a pry bar to carefully
rotate each planet gear as required to achieve
alignment.
7. Apply Loctite 7649 Primer to the bolts and threaded
holes used to secure the planetary on the bogie arm.
See, APPLYING LOCTITE PRODUCTS on page
1.12.
C
8. Apply Loctite 242 Thread Locker to the bolts and C00397
threaded holes used to secure the planetary on the A Differential
bogie arm. See, APPLYING LOCTITE PRODUCTS B Trunnion Pin
on page 1.12. C Bolts
9. Insert bolts finger tight, then torque each: 1. Clean the trunnion pin, bolts and threaded bolt holes
in the differential with isopropyl alcohol, then apply
a. For bogie axles 74.3", 75.0 in. and 77.5" long, Loctite Thread Locker 242 and Loctite 7649 Primer
tighten M18 bolts in a star-shaped pattern. Verify to each bolt. See, APPLYING LOCTITE PRODUCTS
the thread pitch and torque to values listed. on page 1.12.
b. For bogie axles 68 inches long, tighten M16 2. Seat the trunnion pin against the differential and
bolts in a star-shaped pattern. Verify the thread thread bolts finger tight. Torque each to 339Nm
pitch and torque to values listed. (250 lbf-ft) in a star pattern. Verify that there is no
M18 x 1.5 - 441Nm (325 lbf-ft) gap between the trunnion pin and the differential
housing.
M18 x 2.5 - 393Nm (290 lbf-ft)
M16 x 2.0 - 278Nm (205 lbf-ft)
3.25