Removing and installing wheel bearing/hub assembly

GENERAL INFORMATION

Front-wheel-drive vehicles

Signs of damaged bearings include: noise when cornering; stiff wheel rotation with the brake released. Wheel bearings may only be installed using the special tool. The bearing is destroyed during removal, so it must be replaced. REMOVAL

PROCEDURE

1. Remove the caliper and rear brake disc. Refer to subsection Removing and installing brake disc/caliper.

2. Unscrew the twelve-point nut securing the wheel to the hub.

CAUTION

Set the socket wrench handle horizontally to the left so that the vehicle does not slide sideways off the stands when the nut is loosened. Risk of accident!

3. Remove the wheel bearing/hub assembly from the stub axle using puller (A).

4. Remove the remaining bearing race from the hub using a conventional clamp-type puller (A).

CAUTION

Do not damage the ABS sensor.

INSTALLATION

PROCEDURE

1. Wheel bearing/hub assemblies are replaced only as a set. For installation, use special tool AUDI-

3429. Screwing the tool onto the stub axle presses the wheel bearing/hub assembly on. Remove the tool again.

2. Install a new twelve-point nut and pull the hub fully into place. Tighten the nut to 175 N·m.

CAUTION

Set the socket wrench handle horizontally to the right to prevent slipping when tightening the nut.

3. Install the caliper and brake disc. Refer to subsection Removing and installing brake disc/caliper.