Audi Workshop Service and Repair Manuals

Removing and installing hub carrier/wheel bearing housing (steel)

Special tools and workshop equipment required

t	Hub grease cap puller -VW 637/2-

t	Fitting sleeve -3241/4-

t	Torque wrench -V.A.G 1332-

t	Torque wrench -V.A.G 1410-

t	Socket -T40027-

Removing –  Remove wheel trim; on light-alloy wheels, pull off trim cap (use puller in vehicle tool kit).

Vehicles with front-wheel drive   Note If wheel bearing unit is not being renewed, do not remove flange bolt and grease cap. –  Remove wheel. –  Tap gently to detach grease cap from its seat.

–  Pry off grease cap. –  Fit wheel and lower vehicle onto its wheels.

All vehicles (continued): –  Loosen the flange bolt -arrow- only 90°, otherwise the wheel bearing will be damaged.   WARNING The vehicle must be standing on its wheels when loosening and tightening the flange bolt. -Accident risk- –  Remove wheel. –  Secure brake disc with one wheel bolt.

–  Unbolt brake caliper -arrows-. Use the socket -T40027-.   Note t  Tie up brake caliper to body with wire. t  Do not suspend the brake caliper from the brake hose. –  Remove brake disc. –  Remove coil spring → Chapter.

–  Remove flange bolt -1-. –  Unbolt splash plate -3-.

Vehicles with front-wheel drive –  Detach wheel bearing unit -2-.   Note Wheel bearing unit is OK and does not have to be renewed if it can be pulled off hub carrier by hand.

All vehicles (continued): –  Unbolt speed sensor -2-. –  Using a felt-tip pen or similar, mark position of eccentric bolt -1- on top of hub carrier/wheel bearing housing. –  Detach the illustrated bolt connections in the following sequence: Item 5, Item 3, Item 4, Item 1. –  Pull off hub carrier or wheel bearing housing.   Note On vehicles with four-wheel drive, carefully press off drive shaft. Installing   Note Renew bolts and self-locking nuts ⇒ instructions in exploded views from → Chapter onwards. Bonded rubber bushes can only be turned to a limited extent. The mountings of the suspension links must therefore only be tightened when the suspension is in the unladen position → Chapter. Vehicles with front-wheel drive –  Install new wheel bearing unit if required ⇒ note on → Anchor.

All vehicles (continued): –  Tighten bolt connections -1-, -3-, -4- and -5-. –  Secure wheel speed sensor -2- → Item (front-wheel drive) or → Item (four-wheel drive). –  Bolt splash plate and brake caliper onto hub carrier or wheel bearing housing. → Brake system; Rep. Gr. 46; Rear brakes type C38; Servicing brake caliper Vehicles with four-wheel drive –  Screw in 5 wheel bolts hand-tight and apply handbrake firmly.

All vehicles (continued): –  Tighten flange bolt -1- initially only to specified torque, without turning further (turn bolt through specified angle at a later stage when vehicle is standing on its wheels) → Item (front-wheel drive) or → Item (four-wheel drive). –  Install coil spring → Chapter. –  Fit and secure wheel → Wheels and tyres; Rep. Gr.44. Tightening torques:

t  Item 1 - (set eccentric bolt to previously marked position) → Item t  Items. 3 and 4 - → Item t  Item 5 - → Item, (front-wheel drive) or → Item (four-wheel drive) –  Tighten flange bolt -1- → Anchor, Fig. A42-0250 by turning through specified angle → Item, (front-wheel drive) or → Item (four-wheel drive).

Vehicles with front-wheel drive –  Remove wheel. –  Drive in new grease cap. –  Fit and secure wheel → Wheels and tyres; Rep. Gr.44.   Note t  Always renew damaged (dented) grease caps. t  Damaged (dented) grease caps may allow moisture to enter the bearing. For this reason it is important to use the tool shown in the illustration. All vehicles (continued): –  Check and adjust wheel alignment → Chapter. Wheel alignment must always be checked and adjusted if necessary using VW/Audi-approved equipment.