31 11 506 Lowering/raising front axle support (universal lifter)

Special tools required:

31 5 251
00 2 030
31 5 255
31 5 253

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.
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.

Attention!

Before lowering/removing front axle support:

Observe the SAFETY INFORMATION for raising the vehicle.

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

Load spring strut domes with sand bags.

WARNING: Danger to life!

Secure engine in INSTALLATION POSITION WITH SPECIAL TOOL TO PREVENT IT FROM FALLING DOWN .

Necessary preliminary work:

Secure the ENGINE IN INSTALLATION POSITION .
Disconnect BATTERY .
Remove the FRONT UNDERBODY PROTECTION , and REAR UNDERBODY PROTECTION .
F33 Remove: stiffening plate.
Remove steering shaft from steering gear.
Release the WHEEL ARCH PANEL in rear area.
Remove the STEERING ASSEMBLY COVER . (N47)

F33:

Loosen screws (1).

Tightening torque, refer to: 31 10 8AZ.

Release screw (2).

Tightening torque, refer to: 31 10 9AZ.

Remove left and right torsion strut.

Installation note:

Replace screws (1) and (2).

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Release left and right screws (1).

Remove cover (2) on left and right.

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Unlock holder (2).

Take out coolant hose.

Installation note:

Replace faulty holders.

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Unlock and disconnect plug connection (1) on steering gear.

Unclip cable routing from front axle support and fold back cable toward engine support.

Installation note:

Replace faulty cable clips.

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Release screws (1) on left and right.

Tightening torque, refer to: 51 11 6AZ .

Unclip cable tie (2).

Installation note:

Replace faulty cable clips.

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Place special tool 31 5 251 completely onto workshop jack 00 2 030 with a second person helping.

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.

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

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

Align special tools 31 5 251, 31 5 253 and 31 5 255 to front axle support.

Support front axle support by operating workshop jack 00 2 030.

Attention!

The center of gravity of the front axle support must be positioned centrally over the workshop jack!

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Release bolts (1-3).

Tightening torque, refer to: 31 10 1AZ .

Lower front axle support by no more than 10 cm.

Installation note:

Check threads for damage; if necessary, repair with HELICOIL THREAD INSERTS .

Note installation locations of screws.

Bolt (1) M12x45
Screw (2) M12x165 (seal between front axle support and body!)
Screw (3) M14x60

Tighten down first screws (1) and then screws (2, 3).

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Installation note:

Replace gaskets (1).

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