Wheel Hub and Wheel Bearing

Wheel Hub and Wheel Bearing

• Make sure that tools and components (wheel bearing/wheel hub) are correctly seated throughout the entire procedure.

• Always have the (V.A.G 1383 A) under the wheel bearing housing during the entire procedure (danger of accident if parts fall off).

• Different versions of the wheel bearing housing were installed during production depending on the model year => [ Wheel Bearing Housing Characteristics ] Front Axle Overview and for this reason different tools must be used when changing a wheel bearing, allocation, refer to the Parts Catalog.

Special tools, testers and auxiliary items required

• Engine-/Gearbox Jack (V.A.G 1383 A) with Universal Transmission Support (V.A.G 1359/2)

• Hydraulic Press (VAS 6178)

• Assembly Tool (T10205)

• Separating Tool (3 - Kukko 15/3)

• Pneumatic/Hydraulic Foot Pump (VAS 6179)

• Pliers for Circlips, 180 mm Internal Circlip (VAS 5498) , not depicted

• Pressure Gauge W/Connection (VAS 6179/1) , not shown

• Thrust Plate (T10064/4) , not shown

• Thrust Piece (T40185/4) , not shown

- First remove drive axle. Refer to => [ Drive Axle ] Drive Axle.

- Install upper control arm on wheel bearing housing.

- Remove brake disc and backing plate.

- Unclip wire for wheel speed sensor from retainer.

- Remove ABS speed sensor.

Wheel Hub, Pulling Out

- Attach component of T10205 (T10205/1) - 1 - to the wheel hub using the wheel bolts - 2 -.

• The wheel bolts - 2 - must not protrude on the back side of the component of T10205 (T10205/1) - arrow -.

- Mount tools as depicted in illustration.

1. Threaded rod M20 (T10205/8-1)

2. Threaded nut M20 (T10205/8-2)

3. Hydraulic cylinder (VAS 6178)

4. Bell (T10205/2)

5. Gripping pieces (T10205/1)

6. Thrust piece (T10205/3)

7. Threaded nut M20 (T10205/8-2)

8. Threaded rod M20 (T10205/8-1)

- Pull out wheel hub, hold tool securely.

Removing the wheel bearing, versions with dimension - x - = 83 mm => [ Wheel Bearing Housing Characteristics ] Front Axle Overview

- Remove securing ring.

- Mount tools as depicted in illustration.

1. Threaded rod M20 (T10205/8-1)

2. Threaded nut M20 (T10205/8-2)

3. Hydraulic cylinder (VAS 6178)

4. Mounting tube (T10205/5)

5. Mount (T10205/4)

6. Thrust plate (T10205/6) , the collar on the thrust plate must face the final drive.

7. Threaded nut M20 (T10205/8-2)

8. Threaded rod M20 (T10205/8-1)

- Pull out wheel bearing while holding device securely.

Removing the wheel bearing, versions with dimension - x - = 75 mm => [ Wheel Bearing Housing Characteristics ] Front Axle Overview

- Remove securing ring.

- Mount tools as depicted in illustration.

1. Threaded rod M20 (T10205/8-1)

2. Threaded nut M20 (T10205/8-2)

3. Hydraulic cylinder (VAS 6178)

4. Mounting tube (T10205/5)

5. Mount (T10205/4)

6. Thrust plate (T10064/4) , the collar on the thrust plate must face the final drive.

7. Threaded nut M20 (T10205/8-2) (the collar on the nut must face the final drive)

8. Threaded rod M20 (T10205/8-1)

- Pull out wheel bearing while holding device securely.

Continuation for Both Versions

Pulling Bearing Inner Race Off Wheel Hub

- Install separating tool behind bearing inner ring.

1. Separating tool (3 - Kukko 15/3) , the beveled parts of the blades face the bearing inner ring.

2. Bell (T10205/2)

3. Hydraulic cylinder (VAS 6178)

4. Threaded nut M20 (T10205/8-2)

5. Thrust piece (T10205/3)

6. Threaded nut M20 (T10205/8-2)

7. Threaded rod M20 (T10205/8-1)

When pulling off, hold tool so that the bearing inner ring points downward (danger of accident if bearing inner ring jumps off at end of pulling process).

- Pull off wheel hub from bearing inner ring.

Wheel Bearing, Pressing In

• Avoid contaminating with dirt and damaging the seal when setting down/storing.

- Make sure that rubberized sensor ring for ABS - arrow - points toward rear final drive.

If no rubberized ring is visible, check for example with a paper clip, which of the two sides is magnetic. This side must face rear final drive when installed.

• The tapered holes and the contact surfaces on the outer circumference of the wheel bearing must be free of oil, grease and preserving agent.

Versions with dimension - x - = 83 mm => [ Wheel Bearing Housing Characteristics ] Front Axle Overview

- Mount tools as depicted in illustration.

1. Threaded rod M20 (T10205/8-1)

2. Threaded nut M20 (T10205/8-2)

3. Hydraulic cylinder (VAS 6178)

4. Wheel bearing

5. Thrust piece (T10205/7)

6. Thrust piece (T10205/9) , the collar on the thrust piece must face the wheel bearing housing.

7. Threaded nut M20 (T10205/8-2)

8. Threaded rod M20 (T10205/8-1)

Versions with Dimension - x - = 75 mm => [ Wheel Bearing Housing Characteristics ] Front Axle Overview

- Mount tools as depicted in illustration.

1. Threaded rod M20 (T10205/8-1)

2. Threaded nut M20 (T10205/8-2)

3. Hydraulic press (VAS 6178) with pressure knob (T10205/13)

4. Wheel bearing

5. Thrust piece (T10205/7)

6. Thrust piece (T40185/4)

7. Threaded nut M20 (T10205/8-2)

8. Threaded rod M20 (T10205/8-1)

Continuation for Both Versions

- Connect pressure gauge w/connection (VAS 6179/1) between hydraulic cylinder (VAS 6178) and hydraulic line of hydraulic cylinder (VAS 6178).

Pressures, described in the following, apply only to the hydraulic cylinder (VAS 6178).

While pressing in, pressure reading must be between 100 and 190 bar shortly before end of pressing in.

Maximum pressure must not exceed 310 bar.

- Press wheel bearing in until stop.

- Install circlip.

Installing the wheel bearing, versions with dimension - x - = 83 mm => [ Wheel Bearing Housing Characteristics ] Front Axle Overview.

- Mount tools as depicted in illustration.

1. Threaded rod M20 (T10205/8-1)

2. Threaded nut M20 (T10205/8-2)

3. Hydraulic cylinder (VAS 6178)

4. Thrust piece (T10205/10)

5. Thrust plate (T10064/4) , the collar on the thrust plate must face the final drive.

6. Threaded nut M20 (T10205/8-2) (the collar on the nut must face the final drive)

7. Threaded rod M20 (T10205/8-1)

Continuation for Both Versions

- Connect pressure gauge w/connection (VAS 6179/1) between hydraulic cylinder (VAS 6178) and hydraulic line of hydraulic cylinder (VAS 6178).

Pressures, described in the following, apply only to the hydraulic cylinder (VAS 6178).

While pressing in, pressure reading must be between 30 and 100 bar shortly before end of pressing in.

Maximum pressure must not exceed 140 bar.

- Press in wheel hub until stop.

- Install the drive axle. Refer to => [ Drive Axle ] Drive Axle.

Install in reverse order of removal.