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2-12
FIG.
13-Service Brake System
flange lines up with the backing plate
retaining nuts, and remove the nuts.
Pull the axle shaft assembly out of
the housing with tool 4235C and a
slide hammer (Par.t 4-2), then re-
move the backing plate.
If the front backing plate is being
replaced, remove the bolts and nuts
that secure the plate to the front
wheel spindle and remove the plate.
INSTALLATION
1. Position a new rear backing
plate on the retaining bolts in the
axle housing flange. Insert the axle
shaft into the housing so that the
splines engage the differential side
gear with the bearing retainer sliding
onto the retaining bolts and against
the backing plate. Install the retain-
ing nuts through the access hole in
the axle shaft flange.
Position a new front backing plate
to the wheel spindle and' install the
retaining bolts and nuts.
2. Install the wheel cylinder and
connect the brake line as outlined in
this section.
GROUP 2--BRAKES
3. Install the brake shoe and ad-
juster assemblies as outlined in this
section. On a rear brake, connect the
parking brake cable to the lever. In-
stall the brake drum and wheel.
4. Adjust the brake shoes and
bleed the brake system as outlined
in this section.
HYDRAULIC Ll NES
Steel tubing is used throughout
the brake system with the exception
of the flexible hoses at the front
wheels and at the rear axle housing
brake tube connector (Fig. 13).
Always bleed the entire system
after any hose or line replacement.
BRAKE TUBE REPLACEMENT
If
a section of the brake tubing
becomes damaged, the entire section
should be replaced with tubing of
the same type, size, shape, and
length. Copper tubing should not
be used in a hydraulic system.
When bending brake tubing to fit
underbody or rear axle contours, be
careful not to kink or crack the tube.
(016)
~~FRONT
END
RETAININTcup--j';\ HOSE
TOMAINJ~~
)
~BRACKET
H1289-A
All brake tubing should be flared
properly to provide good leak-proof
connections. Clean the brake tubing
by flushing with clean denatured
alcohol before installation.
When connecting a tube to a hose,
tube connector, or brake cylinder,
tighten the tube fitting nut to the
specified torque with Milbar tool
1112-144 or equivalent.
BRAKE HOSE REPLACEMENT
A flexible brake hose should be
replaced if
it
shows signs of soften-
ing, cracking, or other damage.
When installing a new front brake
hose, position the hose to avoid con-
tact with other chassis parts. Place a
new copper gasket over the hose
fitting and screw the hose assembly
into the front brake cylinder. Engage
the opposite end of the hose to the
bracket on the frame so that the
hose is
¥s -%
inch from the lower
flange of the No. 2 cross member
with the suspension at normal posi-
tion (Fig.
J
3). Install the horse-
shoe-type retaining clip, and connect
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Troubleshooting
