31 11 506 Lowering/Raising Front Axle Support

31 11 506 - Lowering/raising front axle carrier (M3, 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 5 256 31 5 250 Universal Axle Bracket






Important!
Before lowering front axle carrier:

In order to avoid damage to lifting platform, perform weight compensation on vehicle.

Load spring strut domes with sand bags.





Warning!
Danger to life!

Secure engine in installation position with special tool Securing Engine In Installation Position to prevent it from falling down.





Necessary preliminary tasks:
- Secure engine in installation position with special tool Securing Engine In Installation Position
- Remove reinforcement plate Service and Repair
- Remove rear underbody protection Removing and Installing/Replacing Rear Underbody Protection
- Remove reinforcement cover on left and right Removing and Installing/Replacing Left/Right Reinforcement Cover
- Remove lower section of steering spindle from steering gear 32 31 070 Removing and Installing/Replacing Steering Spindle Lower Section





Disconnect plug connection (1) on ride-height sensor.

Disconnect plug connection (2) for Servotronic electrohydraulic converter.





Warning!
Risk of injury!

Failure to comply with the following instructions may result in the vehicle slipping off the lifting platform and critically injuring other persons.

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





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 5 253 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 5 256 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 5 256 31 5 250 Universal Axle Bracket to front axle carrier.

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





Important!
Pay attention to power steering hoses and lines when lowering and raising. Hoses/lines must not be kinked/tensioned/bent!





Release bolts (1-4).

Lower front axle carrier by max. 10 cm.

Installation Note:
Check threads for damage; if necessary, repair with Helicoil thread inserts 31 00 ... Front Axle + Steering: Wheel/Chassis Alignment Check Must Be Carried Out After the Following Work.

Make sure screws are installed in correct positions.

- Screw (1) M12x90
- Screw (2) M12x145
- Screw (3) M12x53
- Screw (4) M10x42
Tighten down first screws (1) and then screws (2, 3, 4).

Tightening torque 31 10 1AZ 31 10 Front Axle Suspension.





After installation:

- Carry out steering angle sensor adjustment.