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 -

The wheel bearing must not be under a load while the drive axle threaded connection on the wheel side is loose.

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 the 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 the vehicle still resting on wheels, loosen 12-point bolt - arrow - with (T10361) maximum 90° otherwise the wheel bearing will get 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 -.

• Before installing, clean the threads in the CV joint with a tap.

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°.