Audi Q7: Wheel Bearing and Trailing Arm
Overview - Wheel Bearing
1 - Wheel Bearing Housing
- Removing and installing. Refer to → Chapter "Wheel Bearing Housing, Removing and Installing".
2 - Bolt
- 80 Nm +90º
- Replace after removing
3 - Drive Axle
4 - Bolt
- 8 Nm
5 - Bracket
- For wires
6 - Wheel Bearing
- Wheel bearing unit, removing and installing. Refer to → Chapter "Wheel Bearing Unit, Removing and Installing".
- Servicing the wheel bearing unit. Refer to → Chapter "Wheel Bearing Unit, Servicing".
- Operating the wheel bearing. Refer to → Fig. "Operating the Wheel Bearing".
7 - Wheel Hub
8 - Bolt
- Drive Axle Threaded Connection, Loosening and Tightening. Refer to → Chapter "Drive Axle Threaded Connection, Loosening and Tightening".
Operating the Wheel Bearing
Caution
Risk of contaminating and damaging the seal.
- The wheel bearing -1- must face up in order to remove the wheel bearing unit.
- Always set the wheel bearing unit down on the wheel hub -2-.
- Never reach inside when lifting the wheel bearing.
- Hold the wheel bearing only on the outside.
Wheel Bearing Housing, Removing and Installing
Special tools and workshop equipment required
- Torque Wrench 1332 40-200Nm -VAG1332-
- Engine and Gearbox Jack -VAS6931-
- Engine/Gearbox Jack Adapter - Wheel Hub Support -T10149-
Removing
- Loosen the connection between the drive axle and wheel hub. Refer to → Chapter "Drive Axle Threaded Connection, Loosening and Tightening".
- Remove the brake shield. Refer to → Brake System; Rep. Gr.46; Rear Brakes; Brake Shield, Removing and Installing.
- Disconnect the connector -1- for the rear speed sensor.
Note
Ignore -2-.
- Remove the bolt -1- and free up the bracket -2- with the wires.
- Turn the wheel hub, until the wheel bolt hole is on top.
Caution
Risk of destroying the wheel bearing when installing the wheel bolt.
So that the when installed cannot contact the wheel bearing, it must be installed with an inserted washer.
- Install the Engine/Gearbox Jack Adapter - Wheel Hub Support -T10149- with a wheel bolt -2- and inserted washer -1- on the wheel hub.
- Slightly lift the wheel bearing housing using the Engine/Gearbox Jack Adapter - Wheel Hub Support -T10149- with the Engine and Gearbox Jack -VAS6931- this allows the threaded connections to easily separate.
WARNING
Risk of accident!
- Do not lift or lower the vehicle when the Engine and Gearbox Jack -VAS6931- is under the vehicle.
- Do not leave the Engine and Gearbox Jack -VAS6931- under the vehicle any longer than necessary.
- Remove the bolt -2- and disconnect the threaded connection -1-.
- Remove the bolts -3 and 4- and disconnect the connector -1-.
- Loosen the wheel bearing housing -2- from the drive shaft and remove it.
Installing
Install in reverse order of removal and note the following:
- Install the threaded connections only until stop but do not yet tighten.
Note
Bonded rubber bushings have a limited range of motion. Only tighten suspension bolts when vehicle is in curb weight position or at standard vehicle height.
- Lifting the wheel bearing in curb weight position (refer to → Chapter "Wheel Bearing in Curb Weight Position, Lifting Vehicles with Coil Spring") or at standard vehicle height (refer to → Chapter "Wheel Bearing at Standard Vehicle Height, Lifting Vehicles with Air Suspension").
- Install the brake shield. Refer to → Brake System; Rep. Gr.46; Rear Brakes; Brake Shield, Removing and Installing.
- Tighten the drive axle to wheel hub threaded connection. Refer to → Chapter "Drive Axle Threaded Connection, Loosening and Tightening".
- Overview table for if an axle alignment is necessary. Refer to → Chapter "Need for Axle Alignment, Evaluating".
Tightening Specifications
- Refer to → Chapter "Overview - Transverse Link"
- Refer to → Chapter "Overview - Wheel Bearing"
- Refer to → Brake System; Rep. Gr.46; Rear Brakes; Overview - Rear Brakes.
Wheel Bearing Unit, Removing and Installing
Special tools and workshop equipment required
- Torque Wrench 1332 40-200Nm -VAG1332-
- Torque Wrench 1410 -VAG1410-
Removing
- Loosen the connection between the drive axle and wheel hub. Refer to → Chapter "Drive Axle Threaded Connection, Loosening and Tightening".
- Remove the brake rotor. Refer to → Brake System; Rep. Gr.46; Rear Brakes; Brake Rotor, Removing and Installing.
- Release the catches in direction of -arrows- and remove the locking pin -1- slightly.
- Remove the wind deflector -2- in the rear area downward from the transverse link.
- Unlock the catches again and remove the locking pin and the wind deflector.
- Remove the bolts -arrows- and remove the wheel bearing unit from the drive axle and the wheel bearing housing.
- Operating the wheel bearing. Refer to → Fig. "Operating the Wheel Bearing".
Installing
Install in reverse order of removal and note the following:
- Install the brake rotor. Refer to → Brake System; Rep. Gr.46; Rear Brakes; Brake Rotor, Removing and Installing.
- Tighten the drive axle to wheel hub threaded connection. Refer to → Chapter "Drive Axle Threaded Connection, Loosening and Tightening".
Tightening Specifications
- Refer to → Chapter "Overview - Wheel Bearing"
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-
- Splitter VAS251403 -VAS251403-
Procedure
- Wheel bearing housing is removed. Refer to → Chapter "Wheel Bearing Unit, Removing and Installing".
Wheel Hub, Removing from Wheel Bearing
- Mount 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.
Removing the Bearing Inner Race from the Hub
- 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
- 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
- Place the puller -1- on the groove -arrow- of the bearing inner race -2-.
Continuation for All Versions
- Clamp the puller on the bearing inner race -2- to do so turn 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 -VAS 701 003/2- from the wheel hub -1-.
Pressing Wheel Hub Into Wheel Bearing
- Operating the wheel bearing. Refer to → Fig. "Operating the Wheel Bearing".
- Mount 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.
Caution
Risk of damage or contamination to the wheel bearing.
When setting down or pressing in, make sure there is no dirt or contaminants between the Press Plate -VW401- and the wheel bearing.
- Press the wheel hub into the wheel bearing.
