33 21 001 Removing and installing/replacing left and right output shaft
- The RADIAL SHAFT SEAL FOR THE OUTPUT SHAFT should be replaced every time the output shaft is removed and installed.
Necessary preliminary work:
- Remove REAR AXLE FINAL DRIVE .
- Remove REAR WHEEL .
Activate parking brake and release collar nut (1).
Use special tools:
- Hydraulic unit - 81 64 2 155 744
- Adapter kit - 81 64 2 294 517
- Adapter for torque wrench - 81 64 2 318 661
The following work steps describe pressing out the output shaft:
The following tools are required to press out the output shaft from the drive flange, see illustration for arrangement:
Vehicle components:
| I | Drive flange hub |
|---|---|
| II | Wheel carrier/swivel bearing |
| K* | Wheel stud M14 x 1.5 |
Required special tool components:
| 1 | Hydraulic unit |
|---|---|
| E3 | Washer M24 |
| F3 | Spindle M24 (length 270 mm) |
| C1 | Holding sleeve |
| K* | Wheel stud M14 x 1.5 |
| B1 | Adapter |
Secure output shaft against falling out.
Press out output shaft with hydraulic unit.
The following work steps describe drawing in the output shaft:
The following tools are required to fit the output shaft in the drive flange, see illustration for arrangement:
Vehicle components:
| I | Drive flange hub |
|---|---|
| II | Wheel carrier/swivel bearing |
| III | Output shaft |
Required special tool components:
| 1 | Hydraulic unit |
|---|---|
| E1 | Holding sleeve M24 |
| D1 | Washer |
| F2 | Spindle M24/M20 (length 335 mm) |
| G4 | Adapter M22 x 1.5 to M20 |
| Adapter for torque wrench |
The G4 special tool sleeve used has relatively thin walls due to its technical requirements. So that the load limits of the clamping sleeve are not exceeded when pulling in the output shaft, the adapter 81 64 2 318 661 must be used together with a torque wrench.
Fit adapter with torque wrench to hydraulic unit (see illustration).
Set torque wrench to 20 Nm.
Draw in output shaft with hydraulic tool until the torque wrench is activated.
Operate parking brake and tighten new collar nut (1).
Tightening torque 33 41 2AZ .
Installation note:
Renew collar nut (1), lightly oil collar nut/wheel bearing contact surface only and tighten.
No oil permitted on thread of shaft journal or collar nut.
Secure collar nut (1) by positive peening at flat areas of output shaft.