STANDARD
BRAKES
5-7
REAR
CABLE
ASSY
VIEW
A
\
CONNECTOR
VIEW
F
VIEW
C
Fig.
5-8
Pontiac
Parking
Brake
System
8. Remove the primary to secondary
shoe
spring
and
the adjusting screw,
9. On rear brakes, remove the parking brake lever
from the secondary
shoe.
INSPECTION
AND
CLEANING
1. Inspect brake drums for scoring. Road dirt
frequently cuts
grooves
in drums which do not im-
pair
operation of brakes unless grooving is extremely
severe. When drums are badly scored, inspect brake
shoe
linings carefully for imbedded foreign material.
Replace or recondition only if drums are badly
scored.
CA
UTION:
Removing material from brake drum
reduces
the strength of the drum and also its abil-
ity to transfer heat. Never remove more than is
absolutely necessary and in no case remove more
than 0.030"
(increasing
diameter by 0.060'% After
a
drum is turned, be sure it is free of all metal
particles.
Whenever a drum is turned, the drum
on the opposite side should also be turned. If the
drum diameter is
less
than 0.030
n
oversize
(11.030")
after refinishing, standard linings may be
installed.
If drum diameter is 11.030-11.060",
oversize
linings must be installed.
NOTE:
If new linings are installed on one wheel,
they
must also be installed on the opposite side of
the car.
2. Inspect front wheel bearings and oil seals and
replace as necessary.
3.
Inspect linings for wear or cracks.
Clean
brake
shoes,
drums and backing plates, removing any for-
eign particles that may have
become
imbedded in
lining
surface. Examine
shoes
for
loose
rivets which
must be replaced. Install new
shoes
or reline if
lin-
ings
are badly burned or worn nearly flush with
rivets or if linings show evidence of oil, grease or
brake
fluid on the surface.
4. Carefully pull wheel cylinder links out of the
boots.
Excessive fluid at this point indicates leakage
past piston cups.
NOTE:
A slight amount of
fluid
is nearly always
present
and acts as lubricant for the piston.
5. If an excessive amount of fluid is present, over-
haul
wheel cylinder. See Hydraulic System.
6.
Clean
inner surfaces of brake backing plates
and
all
shoe
contacting points. Apply a small amount
of petroleum base lubricant to pads where brake
shoes
contact backing plates.
7.
Clean
exposed
portions of parking brake cables.
8. Disassemble the adjusting screw assembly and
inspect as follows:
To Next Page
Loading...
