Drive Axle Twelve-Point Bolt With Ribs, Loosening and Tightening

Drive Axle Twelve-Point Bolt with Ribs, Loosening and Tightening

Special tools, testers and auxiliary items required

• Socket XZN 24 (T10361)

• Angle Wrench (V.A.G 1756)

Characteristics Between a Twelve-Point Bolt with Ribs and a Twelve-Point Bolt without Ribs






The contact surfaces - arrow A - and - arrow B - are different on the two-point bolts.

I - twelve-point bolt with ribs - arrow A -

II - twelve-point bolt without ribs - arrow B -

If the bearings are loaded by the vehicle's own weight the wheel bearing will be damaged. This reduces the service life of the wheel bearings. Therefore observe the following:

• Procedure for loosening 12-point bolt.

Vehicles without a drive axle must not be moved, otherwise the wheel bearing will be damaged. If vehicle does have to be moved, always note the following points:

- Install an outer joint in place of the drive axle.

- Tighten outer joint to 120 Nm.

Loosening






- With vehicle still resting on wheels, loosen 12-point bolt with (T10361) maximum 90°, otherwise, wheel bearing will be damaged.

- Lift the vehicle just enough so that the wheels are hanging free.

- Apply the brakes (a second technician required).

- Remove 12-point bolt - arrow -.

Tightening

- Replace 12-point bolt.

• Wheels must not yet touch the ground to tighten the drive axle, wheel bearing may otherwise be damaged.

- Apply the brakes (a second technician required).

- Tighten 12-point bolt to 70 Nm.

- Lower the vehicle onto its wheels.

- Tighten 12-point bolt an additional 90°.