31 21 180 Replacing bearing for front wheel (all-wheel drive vehicle)
WARNING: This page is about a different variant/trim than selected.
IMPORTANT:
There are/will be wheel bearings installed with a thread pitch of 1.5 mm or 1.25 mm (screw connection of wheel bearing on swivel bearing):
- Make sure the allocation of the wheel bearing/screws is correct!
If applicable, check the thread pitch with a thread gauge.
- Make sure that the torque allocation of the wheel bearing on the swivel bearing is correct!
Necessary preliminary work:
- Remove FRONT WHEEL .
Release collar bolt (1), press brake pedal to floor for this purpose.
Tightening torque 31 60 2AZ .
Installation note:
- Renew collar bolt (1) and compression spring (2).
- Pay attention to direction of installation of compression spring!
- Keep collar bolt and spur gearing of bearing/output shaft clean and free of grease.
- Follow installation note of the spur gearing.
Remove BRAKE DISC .
NOTE:
- Check brake pads and renew if necessary!
Press output shaft on swivel bearing to one side slightly and release screws (1).
Tightening torque 31 21 1AZ .
Remove bearing.
Installation note:
- Replace screws.
- Keep contact surface (2) of wheel bearing and swivel bearing clean and free from grease.
- If the wheel bearing is not replaced, all the threaded holes (1) in the wheel bearing must be reconditioned.
IMPORTANT:
Note on installation must be observed without fail!
Installation note:
- Spur gearing of bearing (1) and output shaft (2) must be installed tooth in tooth!
- Tighten collar bolt with compression spring by hand.
- Check whether spur gearing is locked tooth in tooth by reciprocally rotating wheel hub/output shaft.
- Tighten collar bolt.
Tightening torque 31 60 2AZ .