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REAR AXLE AND FINAL DRIVE
3
OVERHAUL 23.Check gear for freedom of rotation and backlash.
Nominal backlash should be present. Excess
backlash necessitates replacement of gears or
differential housing.
24.Check serial number marked on pinion end face
matches that on crown wheel.
25.Clean and fit crown wheel.
26.Fit carrier bearings and assemble tracks to
bearings.
27.Place differential housing with crown wheel and
bearings in pinion housing.
28.Fit bearing caps and bolts. Do not tighten bolts.
29.Fit bearing adjusting nuts and adjust to obtain
zero end float.
30.Tighten bearing cap bolts to90 Nm.
31.Check crown wheel for run-out. This should not
exceed 0,10 mm. If exceeded examine crown
wheel and mounting flange for burrs, grit, etc.
Refit and recheck. A buckled or damaged
differential housing flange is corrected by
replacing differential gear housing.
32.After checking run out remove differential
housing from pinion housing.
33.Remove crown wheel bolts and refit using
Loctite 'Studlock'. Tighten to
58 Nm.
34.Fit pinion head bearing track and original shim to
pinion housing. Use service tools LRT-54-505
and LRT-54-506. If fitting a new shim use
minimum 1.27 mm thickness.
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51REAR AXLE AND FINAL DRIVE
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OVERHAUL 35.Fit pinion outer bearing track to pinion housing.
Use service tools LRT-54-505 and LRT-54-507.
36.Fit pinion head bearing to pinion. Use service
tool LRT-54-502.
37.Fit pinion into its location without shims for
bearing pre-load.
38.Fit outer bearing, and spacer (front axle
differential only).
39.Fit driving flange, washer and nut.
40.Do not fit oil seal at this stage.
41.Tighten pinion flange nut until force required to
rotate pinion is
3Nmif new bearings are fitted.
This will pre-load bearings to check pinion height
dimension.
NOTE: If using original bearings, pre-load
figure is 1.5 Nm.
Drive pinion markings
NOTE: Markings on end face adjacent to
serial number are of no relevance to
servicing.
42.Figures marked on end face opposite to serial
number show in thousandths of an inch,
deviation from nominal, required to set pinion.
Pinions marked plus (+) must be set below
nominal. Pinions marked minus (-) must be set
above nominal. Unmarked pinions must be set at
nominal.
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51REAR AXLE AND FINAL DRIVE
8
OVERHAUL CROWN WHEEL/PINION BACKLASH
ADJUSTMENT
63.Place differential housing in pinion housing.
64.Fit bearing caps and partly tighten bolts.
65.Fit bearing adjusting nuts.
66.Mesh crown wheel to pinion. Using service tool
LRT-54-508 loosen left bearing adjuster nut.
67.Tighten right nut until crown wheel/pinion
backlash is just removed.68.Tighten left nut until it contacts bearing. Continue
turning until a backlash of 0,10 to 0,17 mm is
met.DO NOTloosen right nut otherwise bearing
preload will be affected.
69.Fit locking fingers and roll pins. Align locking
finger with a slot.
70.Evenly tighten bearing cap bolts to
90 Nm.
71.Recheck crown wheel/pinion backlash.
72.Lubricate bearings and gears.
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REAR AXLE AND FINAL DRIVE
9
OVERHAUL REAR HUB ASSEMBLY
Service repair no - 61.15.13.
Overhaul
1.Remove rear hub assembly.
See Repair, Rear
Hub Assembly
2.Remove outer bearing.
3.Remove five nyloc nuts and withdraw ABS
sensor ring, if applicable.
4.Mark, for reassembly, position of hub to brake
disc.5.Remove five bolts and separate hub from brake
disc.
WARNING: A maximum of two road wheel
retaining studs can be renewed. Should
more studs be unserviceable fit new hub
with studs.
6.Remove grease seal and inner bearing from
hub.
7.Remove inner and outer bearing tracks.
REAR HUB COMPONENTS
1. Sensor ring retaining nut ABS.
2. Axle shaft.
3. Axle shaft joint washer.
4. Axle shaft retaining bolt (five off).
5. Lock nut.
6. Lock washer.
7. Hub adjusting nut.
8. Spacing washer.9. Outer bearing.
10. Hub.
11. Inner bearing.
12. Grease seal.
13. Brake disc.
14. Disc retaining bolt (five off).
15. Sensor ring ABS.
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51REAR AXLE AND FINAL DRIVE
10
OVERHAUL Refit
8.Clean hub and fit inner and outer bearing tracks.
9.Pack hub inner bearing with grease and fit to
hub.
10.With lip side leading fit a new seal flush with rear
face of hub. Using service tool LRT-54-003 seal
replacer and drift. Apply grease between seal
lips.
11.Assemble brake disc to the hub, line up
reassembly marks. Applying Loctite 270, fit and
tighten retaining bolts to
73 Nm.
12.If necessary, where applicable, renew sensor
ring studs applying Loctite 270 to threads. Fit
sensor ring using new nyloc nuts. Tighten to
9
Nm.
Ensuring it is correctly fitted to avoid tooth
run out.
13.Pack hub outer bearing with grease and fit to
hub.
14.Fit rear hub assembly.
See Repair, Rear Hub
Assembly
Page 489 of 873
REAR AXLE AND FINAL DRIVE
11
OVERHAUL REAR STUB AXLE
Service repair no - 64.15.22.
STUB AXLE COMPONENTS
1. Rear axle shaft.
2. Stub axle to axle casing bolt.
3. Mudshield.
4. Stub axle.
5. Stub axle joint washer.
6. Axle case.
7. Sensor ABS.
Overhaul
1.Remove hub assembly.
See Repair, Rear Hub
Assembly
2.Remove six bolts from stub axle to axle casing.
3.Remove mudshield.
4.Remove stub axle and joint washer.
5.Remove rear axle shaft from axle casing.
Renew rear stub axle oil seal
6.Remove and discard oil seal. Lubricate seal and
lip with EP90 oil. Using special tool LST 138 fit
new oil seal lipside trailing so that seal is flush
with rear face of stub axle.
Refit
7.Fit new joint washer, stub axle and mudshield
with bolts. Tighten to
65 Nm.
8.Fit rear axle shaft avoid damaging stub axle
seal.
9.Refit rear hub assembly.
See Repair, Rear
Hub Assembly
Page 492 of 873
REAR AXLE AND FINAL DRIVE
1
SERVICE TOOLS AXLE DIFFERENTIAL
LRT-51-003 Flange holder tool
18G1205
LRT-54-504 Universal setting block
18G1914
LRT-54-502 Pinion head bearing remover/replacer
18G476
LRT-99-002 Press
MS47
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51REAR AXLE AND FINAL DRIVE
2
SERVICE TOOLS
LRT-51-001 Oil seal replacer
LST106
LRT-54-505 Extractor for pinion bearing races
RO262757A
LRT-54-506 Replacer adapter pinion head bearing
RO2627571 cup
LRT-54-507 Adaptor pinion tail bearing cup
RO2627572 replacer