Adjusting the brake pressure regulator — VW

Adjusting the brake pressure regulator
Special tools and workshop equipment required
Setting tool
3255
Socket, 27 mm
3257
Brake pressure regulator tester
V.A.G 1310 A
Brake pressure regulator basic setting
Note
If e.g. one or both wishbones are renewed and there are no marks on the wishbone for the spring holder
2
installation position, the following procedure is recommended during basic setting.
If basic setting is not necessary, then brake pressure regulator fine setting
.
Remove both shock absorbers
Running gear, axles, steering
Rep. Gr.
42
Repairing the rear wheel suspension; Removing and installing shock absorbers
.
Insert
setting tool
3255
and pre-tension wishbone
Anchor
.
Visually set horizontal beam
4
to horizontal position by turning both bump stops
1
up to stop on horizontal beam
4
(no pre-tension at bump stop
1
).
Push one of the spring retainers
2
down until the a gap
arrow
of approx. 2 mm is created on opposite side between bump stop
1
and horizontal beam
4
.
Push second spring retainer
2
down until horizontal beam
4
is horizontal again.
Turn both bump stops
1
back completely so that maximum possible gap is created between horizontal beam
4
and bump stops
1
.
Continue with brake pressure regulator fine setting
.
Brake pressure regulator fine setting
Remove both shock absorbers
Running gear, axles, steering
Rep. Gr.
42
Repairing the rear wheel suspension; Removing and installing shock absorbers
.
Push tubes
3255/1
onto setting tool.
Insert
setting tool
3255
with tubes
3255/1
as shown in illustration.
Note
Grease spindle threads, face end of nut and surface of washer with MoS
2
grease.
To tension wishbone, place a shock absorber rubber bush between washer
arrow
and wishbone.
Use of an impact screwdriver is not permitted.
In the event of complaints - rear brakes too severe or weak - first check bump stop setting
Chapter
.
Pre-tension wishbone with
setting tool
3255
to dimension
x
.
Backing plate
Spring
Wishbone
Note
Measurement is carried out from edge of plate in spring retainer
arrow a
to upper edge of assembly hole in wishbone
arrow b
.
Set dimension
x
according to table
Chapter
.
Coil springs may be removed to set wishbone to dimension
x
.
Continue with checking brake pressure
Chapter
.