Disassemble Hub Drive - AR35.25-P-0650-01GWX

Model 463.234 

up to model year 2019 with code ZQ0 (G 500 4x4 ²  ) 

Model 463.255 

up to model year 2019 

with code MUK2 (USA or Canada vehicle model designation) 

with code ZQ0 (G 500 4x4 ²  ) 

Model 463.274 

up to model year 2019 

with code LQ0 (G650 Landaulet) 

	Risk of injury  caused by scraping or cutting body parts on sharp vehicle parts	Always wear protective gloves when working on or near sharp and non-deburred vehicle parts. Deburr repair panels.	AS00.00-Z-0017-01A
	Risk of injury  . Moving parts can pinch, crush or, in extreme cases even sever extremities.	No parts of the body or limbs should be within the operating area of mechanical components when moving components.	AS00.00-Z-0009-01A
	Notes for repair work on hub reduction gear		AH33.25-P-0650-01GWX
	Notes on self-locking nuts and bolts		AH00.00-N-0001-01A
	Notes on repair work on suspension components		AH00.00-P-0100-01A

Courtesy of MERCEDES-BENZ USA

Separation of housing halves 

1. Prepare assembly tool.

   While the work is being carried out, it is necessary at various times to lock the assembly tool to prevent it from turning or to unlock it and align it vertically or horizontally.

2. Fix hub reduction gear in assembly tool and secure to prevent it from turning.

   Aid of helper required.

3. Remove screws (19) of external housing (13).

   The screw (19) directly above the wheel hub (36) is not yet removable at this point in time.

4. Remove screws (18) of inner housing (12).
5. Remove screw/bolts (16).

   Remove washers (15) with screws (16).

6. Detach cap (14).
7. Unscrew screw/bolt (6).
8. Make sure that the assembly tool can be rotated.
9. Rotate housing so that opening of screw (6) and screw of clamp nut (27) are aligned.
10. Slacken screw of clamp nut (27) and unscrew clamp nut (27) using adapter.
11. Remove thrust plate (26) and tapered roller bearing (28).

    The bearing shell of the tapered roller bearing (28) remains in the inner housing (12).

12. Separate inner housing (12) from external housing (13) using grub screws and place inner housing (12) on a suitable surface.

    Aid of helper required.

13. Remove relay spur gear (24) with tapered roller bearings (23, 25) from external housing (13) and place on a suitable surface.

    Do not use a prying tool. This causes damage to the sealing surfaces or the cap (14).

    The bearing shell of tapered roller bearing (23) remains in the external housing (13).

    The bearing shell of tapered roller bearing (25) remains in the inner housing (12).

    Observe alignment of relay spur gear (24).

    Removal of wheel hub (36) 

14. Secure assembly tool to prevent it from turning.
15. Remove outer screw plug (5) on wheel hub (36).

    When disassembling or replacing the wheel hub (36).

16. Remove retaining ring (29).
17. Remove gearwheel (33) of wheel hub (36).

    The gearwheel (33) is plugged onto the shaft of the wheel hub (36).

18. Remove external housing (13) and place on a suitable mat.

    Remove screw (19) directly above wheel hub (36).

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    Disassembly of wheel hub (36) 

    The bearing shell (31a) of tapered roller bearing (31) remains on the external housing.

19. Remove thrust plate (2) from wheel hub (36).
20. Remove tapered roller bearing (31) using puller.
21. Remove thrust plate (30) of tapered roller bearing (31) from wheel hub (36).
22. Drive wheel studs out of wheel hub (36) using suitable means.

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    Removal of drive shaft 

23. Secure gear wheel (34) of drive shaft to prevent it from turning.
24. Remove screw (8) and remove drive shaft.

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    Disassembly of external housing (13) 

25. Remove bearing shell (23a) using internal extractor and counter stay, and fasten to associated bearing cage.

    Do not rest the counter stay directly on the external housing (13).

    This will result in damage to the housing or the sealing surfaces.

26. Remove cylindrical roller bearing (22) using internal extractor and counter stay.

    Do not rest the counter stay directly on the external housing (13).

    This will result in damage to the housing or the sealing surfaces.

    The new caulking points (9) to be applied to secure the cylindrical roller bearing (22) must be 120° apart when installing. The distance to existing caulking points (9) must be at least 30°.

    If the described minimum distance of the caulking points (9) is less than 30°,

    ↓

    Replace external housing (13).

27. Remove shaft seal (32) using a suitable tool.

    Replace shaft seal (32).

28. Remove bearing shell of tapered roller bearing (31) using suitable means.

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    Disassembly of inner housing (12) 

29. Remove bearing shell (25a) using internal extractor and counter stay, and fasten to associated tapered roller bearing.

    Do not rest the counter stay directly on the inner housing (12).

    This will result in damage to the housing or the sealing surfaces.

30. Remove shims (1) from seat of bearing shell (25a).
31. Remove bearing shell (28a) using drift.

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32. Remove circlip (4).
33. Remove gearwheel (34) using drift.
34. Remove shaft seal (21) using a suitable tool.

    Replace shaft seal (21).

35. Remove circlip (3).
36. Remove cylindrical roller bearing (20) using drift.
37. Detach pulse ring (11) from gearwheel (34) using a suitable tool.

    Disassembly of relay spur gear (24) 

    Do not rest the puller directly on the spur gear (24). This will damage the spur gear (24).

38. Remove bearing shells of the two tapered roller bearings (23, 25) and place to one side.

    Do not confuse the bearing shells and the tapered roller bearings (23, 25).

39. Detach tapered roller bearing (23) from spur gear (24) using puller and assign to associated bearing shell.
40. Detach tapered roller bearing (25) from spur gear (24) using puller and assign to associated bearing shell.

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