1999 AUDI A4 bearing

42-3


7 -
Suspension strut
Different versions vehicle data label, page 42
-5
Do not mix different versionsIdentical part for left and right-sidesRemoving and installing page 42
-24
Servicing page 42
-26
8 -
Nut
Always replace
9 -
Wheel bearing and wheel hub Servicing page 42
-16
10 -
Guide bushing
Removing and installing page 42
-14
11 -
Bolt
Always replace75 Nm (55 ft lb)
Pa
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)
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42-4


Note:
A new guide bushing has been introduced for the
A4 Avant and sedan which replaces the old guide
bushing and balance weights. 12 -
Axle beam
Removing and installing page 42
-8
Through m.y. 1998 on vehicles with xenon
headlights a headlight range adjuster is
installed
If equipped with headlight range control
page 42
-8
Refer to Note page 42
-49
Contact surfaces for wheel bearing/wheel
hub and threaded holes must be free of
paint or dirt After installing, check and if necessary
adjust wheel alignment
13 -
Balance weights
14 -
Retaining strap Installing Figs. 2
and 3
15 -
Bolt
20 Nm (15 ft lb)
Pa
ge 5 of 26 Rear axle, servicin
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)
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42-12

Installing

- Install axle together with guide bushings into
mounting brackets and install bolts hand-tight.

- Install suspension struts and hand-tighten
suspension strut to axle beam bolts.

- Coat O-ring for ABS wheel speed sensor with
brake cylinder paste.

Repair Manual, Brake System, Repair Group 46

Repair Manual, Brake System, Repair Group 47 - Push ABS wheel speed sensors into wheel bearing housings up to
stop.
- Install locking plates for ABS wheel speed sensors.
- Route parking brake cables and attach to brake calipers.
- Connect brake lines.
- Adjust parking brake:
- Install heat shield.
- Bleed brakes:
Pa
ge 14 of 26 Rear axle, servicin
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)
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42-16


Rear wheel bearing and wheel hub,
servicing

Before carrying out work on the wheel bearings or
wheel hub the wheel and brake caliper must be
removed:
Repair Manual, Brake System, Repair Group 46


CAUTION!
Notes:
Suspend the brake caliper using a piece of
wire.
Do not allow the caliper to hang by the brake
hose. The unsupported weight can stretch
and damage the brake hose.
Do not attempt to weld or straighten the load
bearing components or parts of the
suspension
Only re-install clean bearings; do not wash out
bearings.
Make sure wheel bearing clearance is set
carefully.
Pa
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)
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42-17


1 -
Axle beam
Contact surface for stub axle must be free
of dirt
2 -
Stub axle Different versions parts catalog
microfiche
3 -
Splash shield
4 -
Combi-bolt
30 Nm (22 ft lb)
5 -
Cotter pin Always replace
6 -
Grease cap Always replaceForcing off Fig. 1Driving in Fig. 2
7 -
Slotted ring
Install over nut - 8 -
8 -
Nut Setting wheel bearing clearance Fig. 3
9 -
Thrust washer
Pa
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42-18


10 -
Outer wheel bearing
Do not wash out if bearing is to be re-used
11 -
Outer wheel bearing outer race Use copper arbor to drive outPressing in Fig. 4Apply small quantity of wheel bearing
grease to wheel bearing seat before
pressing in bearing race
12 -
Brake disc with wheel hub
13 -
ABS wheel speed sensor rotor Drive off evenly using copper arbor through
tapped holes in wheel hub Pressing in Fig. 5
14 -
Inner wheel bearing outer race
Use copper arbor to drive out outer raceApply small quantity of wheel bearing
grease to wheel bearing seat before
pressing in bearing race
Pa
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)
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42-19


15 -
Inner wheel bearing
Do not wash out if bearing is to be re-used
16 -
Seal Always replaceDifferent versions parts catalog
microfiche Fill area between sealing lips with multi-
purpose grease Fig. 7

Pa
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42-21


Note:
Wheel bearing play is correct when the thrust washer can just be moved
using a screwdriver simply by applying pressure, without having to apply
force. Fig. 3 Setting wheel bearing clearance
- Secure with slotted ring and new cotter pin.

Fig. 4 Pressing in outer race for outer wheel bearing
- Apply small quantity of wheel bearing grease to wheel bearing seat
before pressing in bearing race.
Pa
ge 24 of 26 Rear axle, servicin
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)
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