33 31 503 Lowering/Raising Rear Axle Support

33 31 503 Lowering/raising rear axle support

Special tools required:







WARNING:
Danger of injury.
Failure to comply with the following instructions may result in the vehicle slipping off the lifting platform and critically injuring other persons.
Load the luggage compartment with a minimum of 100 kg before lowering/removing the rear axle support. This prevents the vehicle from tilting or sliding off the vehicle hoist.
When supporting components, make sure that:
- the vehicle can no longer be raised or lowered
- the vehicle does not lift off the locating plates on the vehicle hoist.







IMPORTANT:
Before lowering/removing rear axle support:
Observe safety information for raising the vehicle
In order to avoid damage to vehicle hoist, perform weight compensation on vehicle.







Necessary preliminary tasks:
- Remove rear wheels.
- Detach both spring struts on camber link.
- Release propeller shaft on rear axle differential and tie up.
- Detach both brake-caliper supports and tie up.







Unlock plug connection on ride height sensor and disconnect.
Unclip cable for pulse sensor and ride height sensor/brake pad wear sensor on camber link/wheel carrier.







Engage special tool 31 5 251 with a 2nd person helping completely on workshop jack 00 2 030.
Insert special tools 31 5 255 in telescopic supports of a profile rail pair.
Insert special tools 31 5 253 in telescopic supports of other profile rail pair.

NOTE: In a profile rail pair, two profile rails are connected to one another by gearing.







The jacking points on the left side are shown.
Align special tools 31 5 251, 31 5 253 and 31 5 255 to rear axle support.
Support rear axle support by operating workshop jack 00 2 030.

IMPORTANT:
The centre of gravity of the rear axle must be positioned centrally over the workshop jack.
Use tensioning strap 33 5 206 to lash rear axle support to special tool 31 5 251.







Release screws (1).
Tightening torque 33 33 2AZ. 00 00 Excerpt From Company Standard BMW GS 90003-2
Release screws (2) and remove stop plate and compression strut.
Tightening torque 33 33 1AZ. 00 00 Excerpt From Company Standard BMW GS 90003-2
Lower rear axle support.

Installation note:
Check threads for damage; if necessary, repair with Helicoil thread inserts.
Replace screws (2).
Turn in all screws, first tightening screws (2) and then tightening screws (1).