Removing and installing components of ABS system on rear axle, FWD models — AUDI

Speed sensor
Identical part on left and right
Removing and installing
=>Page
45-67
.
Release connector of wheel speed sensor cable and detach. Unclip speed sensor wiring

Clamping sleeve
Always replace
Identical part on left and right
Grease all around with lubricating paste G 000 650 before inserting in wheel bearing housing
Press home in wheel bearing housing

Axle beam/rear axle with splash plate and stub axle
Rotor
Removing and installing
=>Page
45-67
.

Wheel hub
Outer wheel bearing
Thrust washer
Hexagon nut
Adjusting => Page
45-69

Locking ring
Attach to hexagon nut

Grease cap
Replace

Split pin
Always replace

Removing and installing speed sensor on rear axle

Switch off ignition.
Lift rear seat out of its catches.
Release cable holder -arrow-, separate plug connection of speed sensor cable and press out grommet -arrow- (left and right sides are mirror image).
Loosen wheel bolts.
Raise vehicle.
Remove wheel.

Unclip speed sensor wiring from retainers.
Pull speed sensor out of axle beam.

Installing

Renew clamping sleeve (=> Page
45-63
-item
2
).
Grease the O-ring of the speed sensor all around with lubricating paste
G 000 650 before inserting.

Connect speed sensor wiring and press into retainers.

Pay attention to the following points when routing the speed sensor wiring:

Route the speed sensor cable -1- in the area shown on the left and right below the brake pipe -2-.
On the left-hand side, maintain a clearance of about 2 cm between the heat shield of the exhaust system and the speed sensor cable.

On the right-hand side, route the speed sensor cable -1- between the fuel lines -2-.
Fit wheels and tighten to 120 Nm.

Checking rotor on rear axle

Raise vehicle.
Remove wheel.
Pull speed sensor out of wheel bearing housing.
Inspect rotor for signs of damage or dirt.

Removing and installing rotor on rear axle

Removing

Raise vehicle.
Remove wheel.
Unbolt brake caliper => Repair group 46.
Suspend brake caliper from bodywork.
Knock the grease cap off the wheel hub by means of light blows with the hammer on the claw of the special tool.

Press off grease cap.
Remove split pin (=> Page
45-64
-Item
11
-).
Remove locking ring (=> Page
45-64
-Item
9
).
Remove hexagon nut => Page
45-64
-Item
8
-.
Take off thrust washer => Page
45-64
, outer wheel bearing and wheel hub.
Drive off rotor => Page
45-64
with copper drift evenly through the threaded holes of the wheel hub.

Installing

Press rotor onto wheel hub.
Fit wheel hub, outer wheel bearing and thrust washer onto stub axle.
Remove hexagon nut => page
45-64
-Item
8
-.

Set wheel bearing play.

Note:

The wheel bearing play is set correctly if it is still just possible to move the thrust washer with a screwdriver by applying light pressure (on no account use lever action). To re-tighten, tighten the hexagon nut, but rotate the wheel during this step to avoid tensioning the bearing.

Secure with locking ring and new split pin.

Knocking in grease cap

Note:

Damaged grease caps permit the ingress of moisture. That is why it is essential to use the tool shown in the illustration. A damaged grease cap must be replaced.

Install brake caliper => Repair group 46.