Operation and maintenance manual

Section 160-0030
SM 2147 Rev 1 10-03
3
Rear Axle Group - Axle Group (Hub)
0010, BRAKE PARTS.
2. Using suitable lifting/support equipment, carefully
withdraw hub (38) from axle stub (29) complete with
outer bearing (10) cup, inner bearing (27) cup and oil
seals (37). Place hub (38) assembly on clean floor and
block both sides with wooden blocks.
3. Remove and discard oil seals (37) from hub (38)
bore.
4. Check outer bearing (10) cup and inner bearing (27)
cup for wear or damage. If necessary, remove cups
from hub (38) using a soft metal drift.
Note: If either bearing cup or cone need replacing, they
must be replaced as a set.
5. Release brake plates by winding out the slack
adjuster to allow later disassembly.
6. Inspect wheel studs (26) and replace any that are
damaged.
7. Insert a bearing puller behind oil seal housing (33)
and pull it together with bearing assembly (27) cone, oil
seal spacer (31), 'O' ring (32), oil seal housing (33) and
capscrews (36) from axle stub (29).
8. Remove 3 off capscrews (36) from oil seal spacer
(31) and discard 'O' ring (32).
Removal of Complete Brake Assembly
1. Attach suitable lifting equipment to brake unit and
support weight. Loosen and remove capscrews (35)
and ring (34) from axle stub (29)/brake assembly (40).
2. With brake assembly (40) supported, remove brake
assembly (40) from axle stub (29).
3. Place brake assembly (40) on a clean work surface
for disassembly.
4. Remove and discard 'O' ring (39) and oil seals (37)
from brake assembly.
Removal of Axle Stub
1. Fully support weight of axle stub (29) with suitable
lifting equipment.
2. Loosen and remove axle stub retaining capscrew
(30).
3. Carefully remove axle stub (29) and place on a clean
Disassembly of Planet Carrier Unit
1. Unscrew and remove planet carrier bolts (2) and
washers (1).
2. Using suitable lifting equipment to aid this operation,
carefully remove planet carrier (19) assembly from
axle. Place on bench and support in upright position
with timber blocks to prevent assembly from rolling.
3. Carefully remove one planet pin (22) from planet carrier
(19) by first removing grub screw (18) then press planet pin
(22) forward and out from planet carrier (19).
4. Carefully remove one planet gear (5), together with
planet pin (22) and gear washers (4 & 6).
5. Repeat steps 3 and 4 for the other two planet gear
(5) assemblies.
6. Remove and discard ‘O’ rings (23) from planet pins (22).
7. Remove thrust button (7) from planet carrier (19).
Disassembly of Ring Gear Unit
1. Pull out driveshaft (24) and sun gear (9) assembly
from axle stub (29), then place on bench.
2. Remove external circlip (8) from groove in end of
driveshaft (24) and pull off sun gear (9) together with
thrust washer (17) .
3. Remove spring ring (16) and lock ring (15) followed
by hub nut (14).
4. With suitable lifting equipment, remove planet ring
gear (13), hub ring gear (12) and retainer (11) as an
assembly. Outer bearing (10) will come away with hub
ring gear (12).
5. Place assembly on bench with outer bearing (10)
uppermost. Carefully prise out ring gear retainer (11)
using a thin bladed screwdriver.
6. Lift hub ring gear (12) from planet ring gear (13).
Inspect outer bearing (10) cone for wear or damage and
pull from hub ring gear (12) if replacement is required.
7. Check planet ring gear (13) and ring gear retainer
(11) for damage and replace as necessary.
Disassembly of Hub Unit
1. Lock brake plates into the "ON" position by winding
the slack adjusters fully home. Refer to Section 165-