air suspension AUDI A4 1999 B5 / 1.G Suspension Rear Struts And Upper Control Arm Workshop Manual

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Suspension strut and upper
control arm, removing and
installing

Removing

Vehicle must be standing on its wheels
above vehicle lift

- Remove wheel trim.
On light alloy wheels use puller in vehicle tool kit to remove trim cap
- Loosen wheel bolts.
- Raise vehicle on lift.
- Remove wheel.

- Loosen bolted connection of lower control arm to suspension strut
(arrow -1-) page 42
-40
.
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- Loosen bolts from wheel bearing housing to upper control arm (arrow -
1-) page 42
-42
.

- Remove suspension strut mounting bracket bolts (arrows), push wheel
bearing housing down and remove suspension strut along with control
arm.
- Remove bolts from shock absorber to upper control arm ( page 42
-
42
), and remove control arm.
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Suspension strut, servicing

Disassembling and assembling suspension strut
page 42
-71

1 -
Suspension strut mounting bracket
Different versions on left and right-sides
2 -
Self-locking nut Always replace70 Nm (52 ft lb) + 1/4-turn (90 )
3 -
Damper ring
Install with stop resting against end of
spring
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4 -
Coil spring
Always replace on both sidesDifferent versions depending on
suspension version vehicle data label, page 42
-46
to determine correct spring
version
Install on shock absorber and turn so that
end of spring coil is resting against stop of
lower spring retainer Installation position: colored marking on
spring faces down toward spring retainer If suspension strut is correctly installed,
bottom end of spring on left side faces
toward rear; bottom end on right-side faces
toward front
5 -
Bolt Always replace
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6 -
Gas shock absorber
Different versions parts catalog
microfiche Supplied as replacement part with lower
spring retainer pressed on Different versions depending on
suspension version vehicle data
label, page Page 42
-46

Malfunctioning shock absorbers must be
disposed of properly Checking for leaks and noises Special
Information binder
Installation position:
Angle between suspension strut mounting
bracket axis -A- and shock absorber axis -
B- = 0 Angle between axis -B- and axis -C- = 21
2 ; Pay attention to this when
assembling
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Disassembling and assembling suspension
strut

Disassembling

- Remove suspension strut page 42
-65
.

Note:
Illustration shows left-hand suspension strut. - Install suspension strut into VAG1752 spring tensioner.
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Assembling - Remove nut (arrow) and bolt.
- Remove suspension strut mounting bracket and damper ring.
- Remove compressed spring together with VAG1752/1 spring
compressor.
- Remove faulty shock absorber from VAG1752 suspension strut
tensioner and dispose of properly.

Note:
Pay attention to the position of the step on the lower spring retainer
(arrow). - Clamp new shock absorber into VAG1752 suspension strut tensioner,
as shown.
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- Install suspension strut mounting bracket.

Note:
Nut faces in direction of travel! - Install securing bolt into suspension strut mounting bracket and screw
on nut (arrow) loosely.
- Install locating bolt -A- into suspension strut mounting bracket and
secure loosely with nut.

Note:
Illustration shows the position of the degree scale when assembling the
right-hand suspension strut. - Turn suspension strut mounting bracket until pointer on degree scale
(on VAG1752 suspension strut tensioner) is pointing to 21 2 (with
locking bolt -D- loose) and ... L - left-hand suspension strut
R - right-hand suspension strut
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- ... move lever arm -C- with locating bolt -A- perpendicular to height
adjuster -B-.
- Tighten locking bolt -D-.
- Relieve tension from compressed coil spring and remove VAG1752/1
spring compressor.
- Remove locating bolt -A- from suspension strut mounting bracket.

Note:
Illustration shows right-hand suspension strut. - Tighten nut (arrow).

Tightening torque: 70 Nm (52 ft lb) + 1/4-turn (90 )- Remove suspension strut from VAG1752 suspension strut tensioner.
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