PART 2-2
-
Brake System
2-17
temperature grease
at the
points
where
the
brake shoes contact
the
backing plate.
3.
Position
the
brake shoes
on the
backing plate and secure the assembly
with
the
hold down springs.
On the
rear brake, install
the
parking brake
link
and
spring. Connect
the
parking
brake cable
to
the parking brake lever
(Fig.8).
4.
Install
the
shoe guide (anchor
pin) plate on the anchor pin.
5.
Place
the
cable
eye
over
the
anchor
pin
with
the
crimped side
to-
ward the backing plate.
6. Install
the
primary shoe
to
an-
chor spring (Fig. 16).
7.
Install
the
cable guide
on the
secondary shoe web with
the
flanged
hole fitted into the hole
in
the second-
ary shoe web. Thread the cable around
the cable guide groove (Fig. 8).
It
is
imperative that
the
cable
be
positioned
in
this groove and not be-
tween the guide and the shoe web.
8. Install
the
secondary shoe
to
anchor spring with
the
tool shown
in
Fig. 16.
Be certain that the cable eye
is
not
cocked
or
binding
on the
anchor
pin
when installed.
All
parts should
be
flat
on
the
anchor
pin.
Remove
the
brake cylinder clamp.
9. Apply high-temperature grease
(MIC-100-A)
to
the
threads
and
the
socket
end of the
adjusting screw.
Turn
the
adjusting screw into
the ad-
justing pivot
nut
to
the
limit
of
the
threads and then back
off
1/2 turn.
Interchanging
the
brake shoe
ad-
justing screw assemblies from
one
side
of
the vehicle
to
the other would
cause the brake shoes to retract rather
than expand each time the automatic
adjusting mechanism operated.
To
prevent installation
on the
wrong side
of
the
vehicle,
the
socket
end
of
the
adjusting screw
is
stamped with
an
R
or L
(Fig. 17). The adjusting pivot
nuts can
be
distinguished
by
the num-
ber
of
grooves machined around
the
body
of
the
nut. Two grooves
on the
nut indicate
a
right thread; one groove
indicates
a
left thread.
10.
Place
the
adjusting socket
on
the screw
and
install this assembly
between
the
shoe ends with
the ad-
justing screw toothed wheel nearest
the secondary shoe.
11.
Hook
the
cable hook into
the
hole
in the
adjusting lever.
The
ad-
justing levers
are
stamped with
an R
or
L to
indicate their installation
on
right
or
left brake assembly
(Fig.
17).
12.
Position
the
hooked
end
of
the
adjuster spring completely into
the
large hole
in
the
primary shoe web.
The last coil
of
the
spring should
be
at
the
edge
of
the
hole. Connect
the
loop end
of
the
spring
to the
adjuster
lever hole.
Tool-2035-N
or
2086-1
Tool-LM-119
H1146-B
FIG. 15—Retracting Spring
Removal
Tool-2035-N
or
Tool-LM-1
19
H1147-B
FIG. 16—Retracting Spring
Installation
ADJUSTING LEVER
ADJUSTING SCREW
IDENTIFICATION LINES H 114 3
-B
FIG. 17—Adjusting Screw and
Lever Identification
13.
Pull
the
adjuster lever, cable
and automatic adjuster spring down
and toward
the
rear
to
engage
the
pivot hook
in the
large hole
in the
secondary shoe web (Fig. 8).
14.
After installation, check
the
action
of
the
adjuster
by
pulling
the
section
of
the cable between the cable
guide
and the
anchor
pin
toward
the
secondary shoe web
far
enough
to
lift
the lever past
a
tooth
on
the
adjust-
ing screw wheel.
The
lever should
snap into position behind
the
next
tooth,
and
release
of
the cable should
cause
the
adjuster spring
to
return
the lever
to
its
original position. This
return action
of
the lever will turn
the
adjusting screw one tooth.
If pulling
the
cable does
not
pro-
duce
the
action described,
or if the
lever action
is
sluggish instead
of
pos-
itive
and
sharp, check
the
position
of
the lever
on the
adjusting screw
toothed wheel. With
the
brake
in a
vertical position (anchor
at
the
top),
the lever should contact
the
adjusting
wheel
3/16
inch (plus
or
minus
1/32
inch) above
the
centerline
of the
screw.
If the
contact point
is
below
this centerline,
the
lever will
not
lock
on
the
teeth
in the
adjusting screw
wheel,
and the
screw will
not be
turned
as the
lever
is
actuated
by the
cable.
To determine the cause
of
this con-
dition.
a. Check the cable end fittings. The
cable should completely fill
or
extend
slightly beyond the crimped section
of
the fittings.
If it
does
not
meet this
specification, possible damage
is in-
dicated and the cable assembly should
be replaced.
b.
Check
the
cable length. The
ca-
ble should measure
11 1/8
inches
(plus
or
minus
1/64
inch) from
the
end
of
the cable anchor
to
the
end
of
the cable hook.
c. Check
the
cable guide
for
dam-
age.
The
cable groove should
be par-
allel
to
the shoe web, and the body of
the guide should
lie
flat against
the
web.
Replace
the
guide
if it
shows
damage.
d. Check
the
pivot hook
on the
lever.
The
hook surfaces should
be
square with
the
body
of
the
lever
for
proper pivoting. Replace
the
lever
if
the hook shows damage.
e.
See
that
the
adjusting screw
socket
is
properly seated
in
the
notch
in the shoe web.
DISC BRAKE SHOE AND
LINING REPLACEMENT
DISC BRAKE SERVICE
PRECAUTIONS
1.
Grease
or
any other foreign
ma-
terial must
be
kept
off the
caliper
assembly, surfaces
of
the rotor and ex-
ternal surfaces
of
the hub during serv-
ice operations. Handling
of
the
rotor
and caliper assemblies should be done
in
a
way
to
avoid deformation
of
the
brake rotor and nicking
or
scratching
of brake linings.
2.
If the
piston
is
removed
for
any reason,
the
piston seal must
be
replaced.
3.
During removal
and
installation
of
a
wheel assembly, exercise care
not
to
interfere with
and
damage
the
caliper splash shield
or the
bleeder
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