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INSPECTING
Fig. 5-28.
Removing the p iston
A=Rubber seal
Before inspecting, clean the
parts according
to the
instructions
given under "cleaning"
Group
50.
Pay
particular attention to the
cleaning
of the
channels.
Check the pistons
and
pins in the caliper with
a
view to the
AS.B.-device.
If the pins in
th
e
caliper
are worn, the entire
ca
liper
must
be
replaced
.
Sealing
rings and rubber dust covers should be replaced
when reconditioning.
If
there are any scratches or
suchlike
in
any
of
the
cylinders,
chang
e
the
entire
cylinder housing complete. Inspect the other parts and
replace those that are damaged and worn.
Fig. 5-29.
Checking
the A.S.B.-device
VO
LVO
103121
ASSEMBLING
l.
Coat
the working
surfaces of
the
pistons
with
brake fluid.
2. Fit the
new
sea ling rings in
the
cy
linder,
see
Fig
.
5-23.
3.
Fit one of
the
pistons
in
the caliper.
Make
sure
that
th
e
piston does
not
come at a slant and
is
score
d or
that
it
da
mages the pin for the AS.B.-
device. Press in the piston with tool
SYO
2809.
Check the AS.B. -device for
stiffness
with a
tor-
que wrench,
see Fig.
5-29.
The
force required to
press in th
e
piston should
be between
20-80
kgcm
(17.3-69.3
Ib.in
.).
If
the force req uired
I
S
otherwise, the
piston
must
be replaced.
4. Fit
and test the other piston in the
same
way as
above. Place the rubber dust covers on the piston
and housing.
Fit
the retaining
pins.
5. Fit
the
brake pads and the
spacers.
Note
that the
recess in
t,he
brake pad,
see
Fig.
5-30,
should
be
turned away from the venting
nipple.
Place
one
of th
e
retaining pins
in
position and fit
the
damp-
ing spring
s and
then
the
other
retaining
pin.
Fit
the
hairpin
-s
haped
retaining clips. Check
that the
pads are movable.
6. Fit
the venting nipple.
FITTING
l.
Where applicable fitting
is
according
to the in
-
structions given
under "Fitting
of
the front brake
calipers", see page 5
:
13.
Fig
. 5-30.
Rear wheel brake
cal
iper
assemb~ed
S
: 15
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