Rear Axle Center Assembly (168mm Diameter)
Replacement of radial sealing ring on connecting flange of rear axle shaftPreceding work: Remove, install rear axle center assembly. Refer to Differential Assembly, Service and Repair, Removal & Installation of Rear Axle Center Assembly Service and Repair
Note: For installation survey of individual rear axle center assemblies, refer to rear axle center assembly with 168 mm, 185 mm and 210 mm dia. crown wheel.
Note: A leaking radial sealing ring can only be replaced when the rear axle center assembly is removed. Thoroughly clean rear axle housing in the area of the bearing cap, so that no dirt can enter the rear axle housing.
A. Rear axle center assembly with 168 mm dia. crown wheel
A. Rear Axle Plate - Model 201, B. Rear Axle Plate - Model 124:
A. Rear axle closing plate - model 201
B. Rear axle closing plate - model 124
Special tools
Types of oil and capacity
Standard differential:
SAE 90 hypoid gear oil
Capacity 0.7 liter
Circlips for adjusting axial play of connecting flanges
Thickness 1.20-1.80 mm
Graduation 0.05-0.05 mm
Removal, installation
1. Drain rear axle oil.
Installation note: The oil should come up to the bottom edge of the filler opening. For types of oil, refer to table "Types of oil and capacity". Tightening torque for plug 50 Nm.
2. Clamp rear axle center assembly in clamping fixture (054) 201 589 03 31 00 and tighten with hexagon socket bolt (054d) and hexagon bolt (054a). At the same time ensure correct seating of the center assembly in the clamping fixture (arrows).
Rear Axle Closing Plate - Model 201:
Rear Axle Closing Plate - Model 124:
3. Remove rear axle closing plate (54).
Installation note: Replace rear axle breather. Clean sealing surfaces on rear axle closing plate and rear axle center assembly, and coat with sealing compound. Tightening torque of hexagon bolt in strength class 8.8 = 45 Nm, 10.9 = 50 Nm. Torque wrench 001 589 66 21 00.
4. Detach circlip (30) from connecting flange using hook 116 589 01 62 00.
Installation note: Replace circlip. Check axial play. There should be no detectable axial play. However the circlip should still be able to turn in the groove. If required, install thinner or thicker circlip.
33a Connecting Flange With Angular Mass:
5. Pull connecting flange (33a) out of differential side gears.
Installation note: Check contact surface on the connecting flange for the radial sealing ring, replace connecting flange if required.
6. Using a suitable screwdriver, press radial sealing ring (32) out of rear axle housing.
Installation note: Using assembly alignment tool (049b) 201 589 03 15 00, press partially rubberized radial sealing ring (32) into rear axle housing. Lightly coat sealing lip of radial sealing ring with hypoid gear oil.
7. Shim (31) must make good contact with the end face of the differential housing, check (arrow).
8. Install in reverse sequence.