Pressing output shaft out of drive flange and drawing in (2' Series coupe and convertible, 2017-2021)
Necessary preliminary tasks:
- Refer to REMOVING REAR DIFFERENTIAL .
Remove protective cap (1), if required.
Activate parking brake.
Unfasten collar nut (1).
Use special tool, see BMW Workshop Catalogue .
- Hydraulic unit - 81 64 2 155 744
- Adapter kit 1 - 81 64 2 155 745
- Adapter kit 2 - 81 64 2 155 746
- Adapter - 81 64 2 318 661
- Secure output shaft against falling out.
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 graphic for arrangement:
Vehicle components:
| I | Drive flange hub |
| II | Wheel carrier |
Required components for all models and types:
| 1 | Hydraulic unit |
| E3 | Thrust washer M24 |
| F3 | Spindle M24 (length 270 mm) |
| C1 | Holding sleeve |
| B1 | Adapter |
* Components specific to model and type:
| K* | Wheel bolts |
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 graphic for arrangement:
Vehicle components:
| I | Drive flange hub |
| II | Wheel carrier |
| III | Output shaft |
Required components for all models and types:
| 1 | Hydraulic unit |
| E1 | Holding sleeve M24 |
| D1 | Thrust washer |
| F2 | Spindle M24/M20 (length 335 mm) |
* Components specific to model and type (thread diameter, output shaft):
| G2 | Adapter M24 x 1.5 to M20 |
Installation note:
Lightly oil gearing of the output shaft and insert in drive flange.
Due to the technical requirements, the special tool used, sleeve G,* is relatively thin-walled. To ensure that the load limit of the tensioning sleeve is not exceeded when drawing in the output shaft, it is essential to use adapter 81 64 2 318 661 in combination with a torque wrench.
Fit adapter with torque wrench to hydraulic unit (see graphic).
Set torque wrench to 20 Nm.
Draw in output shaft with hydraulic tool until the torque wrench is activated.
Tighten collar nut (1), activate parking brake for this purpose.
Tightening torque 33 41 1AZ .
Secure collar nut (1) by positive peening at flat areas of output shaft.
Installation note:
No oil permitted on thread of shaft journal or collar nut.
Replace collar nut (1).