Audi A6 Typ 4G: Wheel Bearing Unit, Removing and Installing
Wheel Bearing Unit, FWD, Removing and Installing
Special tools and workshop equipment required
- Puller - Grease Cap -VW637/2-
- Sleeve -3241/4-
- Torque Wrench 1332 40-200Nm -VAG1332-
- Torque Wrench -VAG1410-
- Grease
Removing
- Remove the rear wheel. Refer to → Chapter "Wheels and Tires".
- Loosen the cap by lightly tapping on the Puller - Grease Cap -VW637/2--1-.
- Pry the cap with the Puller - Grease Cap -VW637/2--1-.
- Loosen the wheel bearing unit bolt.
- Remove the brake caliper and brake rotor from the wheel bearing housing and (refer to → Brake System; Rep. Gr.46), guide them past the suspension and secure them to the body.
Caution
- Make sure the weight of the removed brake caliper cannot crush or damage the brake hose or brake line.
- Do not press the brake pedal whenever the brake caliper is removed.
- Remove the bolts -1- from the brake shield -2-.
- Reach behind the front seal -arrow-. Remove the wheel bearing unit (not illustrated) over the front seal -arrow-.
Caution
Do not pull the wheel bearing off by the outer race (wheel hub).
Note
If the wheel bearing unit can be removed from the wheel bearing housing by hand, the wheel bearing unit is OK and can be reinstalled.
Caution
Avoid contaminating with dirt and damaging the seal when setting down/storing.
- The wheel bearing -1- must always face up.
- Always set the wheel bearing unit down on the wheel hub -2-.
Installing
Install in reverse order of removal. Note the following:
- Clean the front seal.
- Install the front seal and grease the stub axle -arrow- lightly with Grease.
- Install the brake caliper and the brake rotor. Refer to → Brake System; Rep. Gr.46.
- Install the new cap with the Sleeve -3241/4--1-.
Note
- Always replace a damaged cap.
- Damaged caps allow moisture to get in. Therefore, always use the tool shown.
- Tighten the wheel bearing unit bolt.
- Install rear wheel. Refer to → Chapter "Wheels and Tires".
Wheel Bearing Unit, AWD, Removing and Installing
Removing
- Remove wheel bearing housing. Refer to → Chapter "Wheel Bearing Housing, AWD, Removing and Installing".
- Clamp the wheel bearing housing in a vise with aluminum protective covers.
- Remove the bolts -1- and the wheel bearing unit -2-.
Caution
Avoid contaminating with dirt and damaging the seal when setting down/storing.
- The wheel bearing -1- must always face up.
- Always set the wheel bearing unit down on the wheel hub -2-.
- Never reach into the inside when lifting the wheel bearing.
- Hold the wheel bearing only on the outside.
The same procedure also applies to the wheel bearing without a wheel hub.
Installing
Install in reverse order of removal.
