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

Special tools and workshop equipment required

• Socket AF 24 mm -T10361A-
• Digital Torque Wrench -VAG1756A-

Difference 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.

1. 1
   Twelve-point bolt with ribs -arrow A-
2. 2
   Twelve-point bolt without ribs -arrow B-

   

Caution

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

If the wheel bearings are under the load of the vehicle weight, the wheel bearing will be damaged. This reduces the service life of the wheel bearings.

The drive axle bolt may be loosened maximum 90º when the vehicle is standing on its wheels.

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

• Install an outer joint in place of the drive axle.
• Tighten the outer joint to 120 N·m.

Loosening the Twelve-Point Bolt

• With vehicle still resting on wheels, loosen 12-point bolt with Socket AF 24 mm -T10361A- maximum 90º, otherwise, wheel bearing will be damaged.
• Raise vehicle enough that wheels hang freely.
• Apply the brakes (second technician required).
• Remove the twelve-point bolt -arrow-.

Twelve-Point Bolt, Installing

• Replace the 12-point bolt.

Note

Wheels must not yet touch the ground when tightening the drive axle or the wheel bearing can be damaged.

• Apply the brakes (second technician required).
• Tighten the twelve-point bolt to 70 N·m.
• Lower the vehicle onto its wheels.
• Tighten the twelve-point bolt an additional 90º.

Twelve-Point Bolt without Ribs, Loosening and Tightening, Drive Axle Threaded Connection

Special tools and workshop equipment required

• Socket AF 24 mm -T10361A-
• Digital Torque Wrench -VAG1756A-

Difference 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.

1. 1
   Twelve-point bolt with ribs -arrow A-
2. 2
   Twelve-point bolt without ribs -arrow B-

   

Caution

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

If the wheel bearings are under the load of the vehicle weight, the wheel bearing will be damaged. This reduces the service life of the wheel bearings.

The drive axle bolt may be loosened maximum 90º when the vehicle is standing on its wheels.

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

• Install an outer joint in place of the drive axle.
• Tighten the outer joint to 120 N·m.

Loosening the Twelve-Point Bolt

• With vehicle still resting on wheels, loosen 12-point bolt with Socket AF 24 mm -T10361A- maximum 90º, otherwise, wheel bearing will be damaged.
• Raise vehicle enough that wheels hang freely.
• Apply the brakes (second technician required).
• Remove the twelve-point bolt -arrow-.

Twelve-Point Bolt, Installing

• Replace the 12-point bolt.

Note

Wheels must not yet touch the ground when tightening the drive axle or the wheel bearing can be damaged.

• Apply the brakes (second technician required).
• Tighten the twelve-point bolt to 200 N·m.
• Lower the vehicle onto its wheels.
• Turn the twelve-point bolt an additional 180º.