Saab 95 1967, Service Manual

Page: 461 / 610

1, Remove the friction pads as described previously. 2
2, Bend up the retaining plates and remove the two re.
mining bolts which hold the brake housing to the 3
steering knuckle housing. Lift the brake housing away
from the brake disc. Do not disconnect the brake
hose, but place the brake housing so that the hose
does not get stretched.
NOTE
Never allow the brake housing to hang from the ‘
brake hose. Collect the brake fluid when the piston
is removed. s '2“
FITTING THE WIPER SEAL
1. Piston
3. Press the brake pedal down carefully, thus forcing the 2, Pinon ml
piston out for enough for it to be taken off by hand. 3- 503' main“? W59" “3'
Keep a clean container handy, so that you will be able 4' WW" “3'
to collect the brake fluid when the piston is removed.
4. Disconnect the brake hose from the brake cylinder.
insert a plug in the hose to prevent the escape of the
brake fluid and also to prevent the entry of impurities 3. if the wiper seal has been removed previously, smear
into the system. a new, dry seal with the special lubricant and place it
5. Remove the two springs which hold the cylinder in i" the retainer With its 9’00"e turned towards the pis-
place and remove the cylinder.
6, If the piston seal needs replacing, it can now be re- 4. Press the retainer and seal home with the aid of screw
moved from its groove in the cylinder. vise 78 60 43° and distance piece.
7. If it is necessary to remove the wiper seal, it can now 5' Replace the brake cylinder in the brake body assem-
be taken out with the aid of a screwdriver. bly and refit the springs.
6. Remove the plug from the brake hose, fit a new cop.
per washer and tighten the hose securely in the cyl-
inder. .
7. Put the brake in place and tighten the retaining bolts.
Remember to secure the bolts with the retaining plate.
IMPO RTANT
Always use either brake fluid or denatured alcohol
(methylated spirit) for cleaning.
WARNING
Make quite sure that the brake hose is not twisted.
If it is not mounted in a neutral position, slacken its
Reassembly of brake piston and seals
1. Coat a new, dry seal with special lubricant (Lockheed
Disc Brake Lubricant) and place it carefully in its
groove in the cylinder, making sure that it is prolerly
seated.
2. Check that the piston and cylinder are thoroughly
clean and coat them with the special lubricant. Press
the piston into the cylinder, making sure that the re-
cess in the contact surface facing the friction pad is
pointing downwards. The brake piston of the latest de-
sign has a face ground contact surface facing the fric-
tion pad. In this connection the damping shim has
attachment at the wheel housing and then retighten
it in the correct position.
B. Refit the friction pads, spring and new cotter pins as
described earlier.
NOTE
Fit a new spring if the old one seems to be exhausted.
CAI.-
has
been altered in such a way that the piston has the cor-
responding fit-up facing the friction pad. To facilitate
refitting of the wiper seal, do not press the piston fully
home, but leave about 0.4 in. (10 mm) outside the cyl-
inder.
9. Bleed the brake system and pump repeatedly up and
down with the brake pedal in order to adjust the fric-
tion pads in against the disc. Top up with brake fluid
in the reservoir.
WARNING
Do not forget to pump repeatedly with the brake
pedal, as othenNise the pedal will go all the way
down when the brakes are applied.
SA”
523-3