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BRAKES
PIG.
P-8—TRANSMISSION
BRAKE
ADJUSTMENT
1—
Bail
Nut
2— s,6"
12,38 mm.I
Clearance
3—
Adjusting
Screw
d.
Rotate the
drum
until
one pair of holes in the
drum
are opposite the two adjusting screw wheels
in
the brakes. Use the
edge
of the holes as a
fulcrum
and
with
a suitable
tool
or screwdriver for
adjusting,
rotate the adjusting screw wheels,
mov
ing
the handle of the
tool
away
from
the
drum
until
the
shoes
are snug in the
drum.
e.
Examine the brake operating cable to be
sure
that
it is not
worn
or damaged. Free it up thorough
ly
and lubricate
it.
Make
sure
the operating handle
on
the instrument panel is
fully
released.
Adjust
the clevis on the brake end of the operating cable
until
the clevis pin
will
just go through the hole
in
the clevis and brake operating lever
without
slack
in the cable.
Tighten
the clevis
lock
nut.
f.
After
the cable is connected back off seven
notches on each adjusting screw wheel
which
will
give
the proper
running
clearance between the
lining
and the
drum.
g.
Reconnect the propeller shaft.
Install
retracting
spring
clip,
clevis pin and the cotter pin, also, in
stall
the retracting spring
link
and spring.
h. The
position
of the brake operating lever, Fig.
P-8, must be correctly set. The
position
of this
lever
is determined by the adjustment of the cam or
brake operating
link,
which
spreads
the two
shoes.
The
operating
link
is adjusted by
means
of the
special
ball
nut to set the operating lever
with
[2,38
mm.] clearance between the closest
point
of
the lever and the brake backing plate.
i.
The
position
of
this
lever should be checked when
making
a major adjustment or when
relining
the
brakes and
if
found
incorrect readjust it to give this
clearance before adjusting the brake cable
clevis.
P-14.
Self-Adjusting
Wheel
Brake
Units
Self-adjusting
brakes are standard equipment on
all
late production
'Jeep'
vehicles.
The
wheel brake units consist of a support plate,
two
brake
shoes,
brake
shoe
return springs, self-
adjusting
operating parts, and a wheel
cylinder.
The
automatic adjuster continuously maintains
correct
operating clearance between the brake
lin
ings
and the drums by adjusting the brakes
in
small
increments in direct
proportion
to
lining
wear. This
continuous
adjustment prevents gradual increase
in
the brake pedal
travel
as the
linings
wear. The
adjuster, therefore,
adds
the safety feature of
main
taining
adequate
pedal reserve
during
the service
life
of the
lining.
After
the
lining
wears enough to require adjustment, the adjusting cable or
link
will lift
the lever
into
engagement
with
the next
tooth
of the
star
wheel
when the brake is applied. When the brake
is
released, the
shoes
return to the anchor. The
self-adjuster
utilizes
the movement of the brake
shoes
in a brake application to
actuate
the adjuster
lever.
This
action
will
repeat
on
subsequent
brake applica
tions,
if
necessary,
until
the
shoe
to
lining
clearance
is
reduced to a
point
where the
shoe
movement
is
not enough to
cause
the cable to
lift
the lever
to
the next
tooth.
The
adjusting lever, adjusting screw assembly,
linkage
rods and lever crank parts are
left
hand
or
right
hand parts, NOT interchangeable, and
MUST
be kept
separated.
The
automatic adjuster on the brake system con
sists
of an adjusting screw assembly, adjusting
lever,
two adjusting
links,
and a lever crank, (Fig.
P-10).
Note:
It is not
necessary
to remove the rear axle
shaft hubs to
perform
minor
brake service.
When
replacement of
oil
seals
is also required, hubs must be removed.
On
vehicles equipped
with
self-adjusting brake
assemblies, self-adjustment of the
front
wheel brakes
takes
place
during
reverse wheel brake ap
plication
and the rear wheel brake adjustment
takes
place
during
forward
vehicle brake application.
P-15.
Relining
Wheel
Brakes
a.
When
necessary
to reline the brakes, the vehicle
should
be raised so that all
four
wheels are free.
b.
Turn
the brake
shoe
star
adjustment all the
way
in. Refer to Fig. P-12.
c.
Remove the wheels, hubs and drums,
which
will
give
access
to the brake
shoes
(Fig.
P-10, P-11).
d.
Install
Wheel
Cylinder
Clamps C-416 to re
tain
the wheel
cylinder
pistons in place and prevent leakage of brake
fluid
while
replacing the
shoes.
P-16.
Brake
Shoe
Removal
•
Removing the Front Brake
Shoes.
•
Refer to Fig. P-10.
a.
Using
Tool
C-3785
or equivalent remove the
upper linkage rod and brake
shoe
return springs.
b.
Remove the brake
shoe
retainer, spring and pins.
c. Remove the anchor pin plate.
d.
Remove the
primary
and secondary brake
shoe
assembly
from
the support.
e.
Overlap the anchor
ends
of the
primary
and
secondary brake
shoes
and remove the adjusting
screw, adjuster lever,
lower
return spring, and
linkage
rods. 328
