Drive Axle Twelve-Point Bolt, Loosening and Tightening

Drive Axle Twelve-Point Bolt, Loosening and Tightening

Special tools, testers and auxiliary items required

• Socket 24 mm (T10361)

• Angle Wrench (V.A.G 1756)

Wheel bearing must not be burdened while 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. The wheel bearings will be stressed and the life expectancy reduced. Therefore, observe the following:

• Procedure for loosening 12-point bolt.

Vehicles without drive axle must not be moved, otherwise wheel bearing will be damaged. If vehicle must be moved, observe the following:

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

- Tighten outer joint to 120 Nm.

12-point bolt, loosening

- With vehicle still standing on its wheels, loosen the 12-point bolt a maximum of 90°, otherwise wheel bearing will be pre-damaged.

- Raise vehicle enough that wheels hang freely.

- Operate brake (second technician required).

- Remove 12-point bolt - arrow -.





12-point bolt, fastening

- Replace 12-point bolt.

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

- Operate brake (second technician required).

- Tighten 12-point bolt to 70 Nm.

- Lower vehicle onto its wheels.

- Tighten 12-point bolt an additional 90°.