Examination
Warning: Lifting and installing the vehicle on stands is dangerous! Therefore, before carrying out the operation, read the subsection Jacking up a car.
1. Raise the front of the vehicle and support it on stands.
2. Press the lever up with force and pull it down. Watch the support while doing this.
3. Press the wheel firmly from the bottom outwards and inwards. Watch the ball joint while doing this.
4. In both checks, no noticeable play is allowed in the ball joint. Play in the wheel bearing or shock absorber support should be taken into account.
5. Check for damage to the rubber boot. If there is damage, the joint should be replaced.
Removal
6. Remove the shock absorber strut together with the wheel bearing housing, refer to subsection Removal and installation the shock absorber strut and wheel bearing housing.
7. Loosen the ball joint mounting nut with an open-end wrench or the AUDI–3077 tool. If the pin rotates, hold it with an angle wrench (A) size Torx T30.
8. Press out the ball joint pin using a puller – 1–, for example, Hazet 779, from the wheel bearing housing. In doing so, be careful not to damage the rubber boot.
Installation
1. Secure the ball joint with a new self-locking nut to the wheel bearing housing. Tighten the nut to 45 Nm, holding the journal from turning with a T30 Torx key.
2. Reinstall the shock absorber strut and wheel bearing housing, refer to subsection Removal and installation the shock absorber strut and wheel bearing housing.
Wheel bearing
Signs of a damaged bearing include noise when turning sharp turns and heavy wheel movement when the brake is released.
Wheel bearings have a very tight fit in the steering knuckle. They can only be installed using the appropriate special tool. This work must be carried out in a service station. To replace a wheel bearing, its housing must be removed. The bearing is destroyed as a result of pressing out and must be replaced.
(Read the original source on the website: audimanual.ru)