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2-18
installed. It is not necessary to re-
move the brake cylinder from the
backing plate to disassemble, inspect,
or hone and overhaul the cylinder.
Removal is necessary only when the
cylinder is damaged or scored beyond
repair.
DISASSEMBLY
1. Remove the
links
and the
rubber boots from the ends of the
brake cylinder. Remove the pistons,
cups, and return spring from the
cylinder bore (Fig. 22).
2. Remove the bleeder screw
from the cylinder.
INSPECTION
l. Wash all parts in clean brake
fluid. Dry with compressed air.
2. Replace scored pistons. Al-
ways replace the rubber cups and
dust boots.
3. Inspect the cylinder bore for
score marks or rust. If either condi-
tion is present the cylinder bore inust
be honed. However, the cylinder
should not be honed more than
0. 003 inch beyond its original
diameter.
4. Check the bleeder hole to be
sure that it is open.
-
ASSEMBLY
l. Apply a light coating of heavy-
duty brake fluid to all internal parts.
2. Thread the bleeder screw into
the cylinder and tighten securely.
3. Insert the return spring, cups,
and pistons into their respective posi-
tions in the cylinder bore (Fig. 22).
4.
Replace the boots and
links.
Assemble the brake shoes and
drums
as previously described.
5. Bleed the brakes and refit ,the
wheels.
BRAKE BACKING PLATE -
DRUM BRAKE
REMOVAL
1.
Remove the wheel and brake
drum. Disconnect the brake line from
the brake
cylinder.
Z. Remove the brake shoe and ad-
juster assemblies and tbe wheel cyhn-
der as outlined in this section. On the
rear wheels, disconnect the parking
brake lever from the cable.
3. If the rear backing plate is being
replaced, remove the axle shaft from
the applicable rear axle as outlined
in Group 4, disengage parking brake
cable retainer from ba-cking plate.
Remove the backing plate and gasket.
GROUP
2-BRAKES
If the front backing plate is being
replaced, remove the bolts and nuts
·
that secure the backing plate to the
front wheel spindle and remove the
plate and gasket.
INSTALLATION
If a rear backing plate is to be re-
placed, position a new rear backing
plate and gasket on the attaching
bolts in the axle housing flange. Insert
parking brak.e cable into backing plate
and secure retaining fingers. Install
the rear axle shaft
Refer to Group 4 for the proper
installation procedure.
I.
If
the front brake backing plate
is to be replaced, position a new front
backing plate and gasket to the wheel
spindle and install the attaching bolts
and nuts.
z.
Install the wheel· cylinder and
connect the brake line as outlined in
this section.
3. Install the brake shoe and ad-
juster assemblies as outlined in this
section. On a rear brake, connect the
parking bralte cable to the
lever.
4. Adjust the brakes, Page 2-14.
Install the brake drum and wheel.
Bleed the brakes as outlined on
Page 2-3.
FRONT WHEEL HUB AND
ROTOR ASSEMBLY -
DISC BRAKES
REMOVAL
l. Remove the wheel and tyre
from the hub. Be careful to avoid
damage or interference with the
bleeder screw fitting.
Z. Remove the caliper assembly
from the spindle and the
rotor.
If
the
caliper does not require servicing, it is
not necessary to disconnect the brake
hose or remove the caliper from the
vehicle. Position the caliper out of the
way, and S\!pport it with a wire to
avoid damaging the caliper or stretch-
ing the hose. Insert a clean cardboard
spacer between the linings to prevent
the piston from coming out of the cyl-
inder bore while the caliper is re-
moved.
Handle the rotor and caliper assem-
blies in such a way as to avoid defor-
mation of the rotor and nicking,
scratching or contamination of the
brake linings.
J. Remove the grease cap from the
hub. Remove the cotter pin, nut lock,
adjusting nut, and flat washer from
the spindle. Remove the outer bearing
cone and roller
assembly.
4. Remove the hub and rotor as-
sembly from the spindle.
INSTALLATION
l.
If the rotor is being
replaced,
remove the protective coating from
the new rotor with carburetor de-
greaser. Pack a new set of
bearings
with specified grease (Refer Group
3)
and install the inner bearing
cone and toller assembly in the inner
cup. Pack grease lightly between the
lips of a new grease seal and install
the seal.
·
If the original
roto~
is being in-
stalled, make sure that the hub is
clean, that the inner bearing and
grease seal are lubricated and in good
condition, and that the rotor braking
surfaces are clean.
Z. Install the hub and rotor assem-
bly on the spindle.
3. Lubricate and install the outer
wheel bearing, washer and adjusting
nut.
4. Adjust the wheel bearings to
specification, and then install the nut
lock, cotter pin, and grease cap. The
wheel bearing adjustment is especially
Important with disc brakes.
5. Mount the caliper assembly on
the spindle following the Disc Brake
Caliper Assembly Installation proce-
dure in this section.
DISC BRAKE ROTOR
SPLASH SHIELD
REMOVAL
1. Remove the caliper and the hub
and rotor assembly as outlined under
Removal in the foregoing procedure
(it is not necessary to disconnect hy-
draulic connections).
z.
Remove the three bolts that at-
tach the splash shield to the spindle:
and remove the shield
.
3. Remove and discard the splash
shield to spindle gasket.
INSTALLATION
I. Install a new splash shield to
spindle gasket.
z.
If
the shield is bent, straighten it
out before installation. Position the
shield to the mounting bracket, install
the attaching bolts, nuts and torque
them to
specification.
J. Install the hub and rotor assem-
bly and the caliper as outlined under
Installation in the foregoing proce-
dure.
DISC BRAKE CALIPER ASSEMBLY
GIRLING
REMOVAL
1. Remove the wheel and tyre
assemblies from the hub.
Use
care
to avoid damage or interference
with the bleeder screw fitting
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