33 31 503 Lowering/Raising Rear Axle Carrier (Universal Lifter)

33 31 503 - Lowering/raising rear axle carrier (universal lifter)





Special tools required:
- 00 2 030 00 2 030 Universal Hydro-Lifter Basic Unit
- 31 5 251 31 5 250 Universal Axle Bracket
- 31 5 253 31 5 250 Universal Axle Bracket
- 31 5 255 31 5 250 Universal Axle Bracket






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.

Read and observe the information on load distribution in the lifting platform operating instructions.

Before lowering/removing the rear axle carrier, it is essential to place a minimum load of 100 kg in the luggage compartment to prevent the vehicle from toppling/slipping off the lifting platform!

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 lifting platform





Necessary preliminary tasks:
- Remove both rear coil springs 33 53 000 Removing and Installing / Replacing Rear Left or Right Coil Spring
- If necessary, remove tension strut(s)





Press clutch pedal down to floor and secure with pedal support.

Note:
The pedal support may only be released when the brake lines are reconnected.

This prevents brake fluid from emerging from the expansion tank and air from entering the system when the brake lines are opened.





Position an oil sump underneath to catch brake fluid.

Release banjo bolts (1), gripping brake hoses (2) at square head in the process.

Disconnect brake hoses (2) and seal off with plugs.

Installation Note:
Make sure brake hoses are laid without tension and with sufficient spacing to adjoining components.

Tightening torque 34 32 1AZ 34 32 Brake Lines.





Unclip cables for pulse generator and ride-height sensor/brake pad sensor on rear axle carrier at side.





Slacken nut (1).

Turn bracket (2) for exhaust system towards rear.

Release sheet nut and bolts (arrows).

Place heat shield on exhaust system.





Engage special tool 31 5 251 31 5 250 Universal Axle Bracket with a 2nd person helping completely on workshop jack 00 2 030 00 2 030 Universal Hydro-Lifter Basic Unit.

Insert special tools 31 5 255 31 5 250 Universal Axle Bracket in telescopic supports of a profile rail pair.

Note:
In a profile rail pair two profile rails are connected to each by toothing.

Insert special tools 31 5 253 31 5 250 Universal Axle Bracket in telescopic supports of other profile rail pair.





Note:
The jacking points on the left side are shown.

Align special tools 31 5 253 31 5 250 Universal Axle Bracket and 31 5 255 31 5 250 Universal Axle Bracket to rear axle carrier.

Support front axle carrier by operating workshop jack 00 2 030 00 2 030 Universal Hydro-Lifter Basic Unit.





Remove compression struts Replacing Left or Right Rear Axle Carrier Compression Strut (1).

Release screws (2) and swivel/remove stop plates to one side.

Lower rear axle carrier.

Installation Note:
Check threads for damage; if necessary, repair with Helicoil thread inserts 33 00 ... Notes on Repairing Threads.

First install compression struts Replacing Left or Right Rear Axle Carrier Compression Strut (1) and then tighten down screws (2).

Tightening torque 33 33 1AZ [1][2]33 33 Rear Axle Suspension.





After installation:

- Bleed braking system 34 00 050 Bleeding Brake System With DSC