Wheel Bearing Unit, Servicing

Special tools and workshop equipment required 

• Press Plate: VW401 
• Press Plate: VW402 
• Press Piece - Multiple Use: VW412 
• Hydraulic Press - Bushing Assembly Tool Kit : T10230 
• Pneumatic Hydraulic Press: VAS6654 
• Puller Set VAS701003: VAS701003 

Procedure 

• Wheel bearing unit is removed. Refer to WHEEL BEARING UNIT, REMOVING AND INSTALLING .

Wheel Hub, Removing from Wheel Bearing

Fig 1: Identifying Tool Set Up

Courtesy of AUDI OF AMERICA, LLC

-- Lay out the special tools as shown.

1. Press Piece - Multiple Use: VW412 
2. Hydraulic Press - Bushing Assembly Tool Kit - Sleeve: T10230/3 
3. Hydraulic Press - Bushing Assembly Tool Kit - Thrust Piece: T10230/8 
4. Wheel Bearing Unit
5. Press Plate: VW402 
6. Press Plate: VW401 

-- Press the wheel hub out of the wheel bearing.

Bearing Inner Race, Removing from Wheel Hub 

Fig 2: Bearing Inner Race Remover Tools

Courtesy of AUDI OF AMERICA, LLC

-- Prepare the puller from the Puller Set VAS701003: VAS701003  as follows:

-- Install the Puller Set - Clamping Sleeve: VAS701003/1  on the Puller Set - Clamping Pliers, Diameter 66-70 mm: VAS701003/7  .

-- Install the Puller Set - Threaded Spindle: VAS701003/2  in the adapter sleeve and attach the Puller Set - Thrust Piece: VAS701003/3  .

Bearing inner race version 1: 

Fig 3: Place Puller On Ball-Cage

Courtesy of AUDI OF AMERICA, LLC

-- Remove the ball-cage assembly from the bearing inner race -2-.

-- Place the puller -1- as shown on the ball bearing race -arrow- of the bearing inner race.

Bearing inner race version 2: 

Fig 4: Place Puller On Ball-Cage

Courtesy of AUDI OF AMERICA, LLC

-- Place the puller -1- on the groove -arrow- of the bearing inner race -2-.

Continuation for All Versions: 

Fig 5: Clamp The Puller On The Bearing Inner Race -2-

Courtesy of AUDI OF AMERICA, LLC

-- Clamp the puller on the bearing inner race -2- by turning the Puller Set - Clamping Pliers, Diameter 66-70 mm: VAS701003/7  with the Puller Set - Special Ring Spanner AF36: VAS701003/5  in the direction of -arrow- and counterhold the Puller Set - Clamping Sleeve: VAS701003/1  with the Puller Set - Clamping Handle: VAS701003/4  .

-- Remove the bearing inner race with the Puller Set - Threaded Spindle: VAS701003/2  from the wheel hub -1-.

Wheel Hub, Pressing in Wheel Bearing 

Fig 6: Identifying Punch VW 412, Thrust Plate VW 402, Wheel Hub, Ball Bearing & Thrust Plate VW 401

Courtesy of AUDI OF AMERICA, LLC

-- Lay out the special tools as shown.

1. Press Piece - Multiple Use: VW412 
2. Press Plate: VW402 
3. Wheel Hub
4. Wheel Bearing
5. Press Plate: VW401 

• The reworked surface of the wheel bearing outer race faces down.

-- Press the wheel hub into the wheel bearing.