Rear Axle Center Assembly (210mm 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.
C. Rear axle center assembly with 210 mm dia. crown wheel
Special tools
Spacer ring between inner constant-velocity joint and differential housing
Thickness 2.6-3.4 mm
Graduation 0.1 to 0.1 mm
Types of oil and capacity
Standard differential: SAE 90 hypoid gear oil, refer to Specifications for Service Products Specifications
Differential with ASR: SAE 90 hypoid gear oil, refer to Specifications for Service Products Specifications
Differential with ASD: Special hypoid gear oil, refer to Specifications for Service Products. Specifications
Capacity 1.3 liters
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)129 589 00 31 00 with locator section (054a) 129 589 00 31 00 section 15 and spacer (054b) 129 589 00 31 00 section 10.
Rear Axle Closing Plate - Model 124:
Rear Axle Closing Plate - Model 124.034/036:
3. Remove rear axle closing plate (54) from rear axle housing.
Installation note: Replace rear axle vent and tighten to 25 Nm. Clean sealing surfaces on rear axle closing plate and rear axle center assembly and coat with sealing compound. Tightening torque for hexagon bolts (56) strength class 8.8 = 45 Nm, 10.9 = 50 Nm and for collar bolts 55 Nm. Torque wrench 001 589 66 21 00.
4. Detach circlip (30) from connecting flange using hook 116 589 01 62 00. Remove connecting flange with spacer ring.
ASR Connecting Flange:
Installation note: Replace circlip, check axial play (except on vehicles with ASD). There should be no axial play: the circlip should still be able to turn in the groove. If required, use a thicker or thinner spacer ring (31).
5. On vehicles with ASD: Using extractor (071)129 589 02 33 00 section 04 pull radial sealing ring (70j) out of ring cylinder piston (70b).
Installation note: Using pressing-in tool 124 589 0115 00 press in radial sealing ring (70j). Lightly coat sealing lip with hypoid gear oil.
Location - ASR Rear Axle Housing:
6. On vehicles with ASR or standard rear axle housing: Using screwdriver press radial sealing ring (32a) out of rear axle housing.
Location - Standard Rear Axle Housing:
Location - ASR Rear Axle Housing:
Installation note: Using pressing-in tool (032a) 140 589 06 15 00 in the case of standard rear axle housing and 126 589 04 15 00 in the case of ASR rear axle housing, press in radial sealing ring (32). Lightly coat sealing lip of sealing ring with hypoid gear oil.
7. Install in reverse sequence.