2-10
GROUP
2-BRAKES
tire
to the hub and
start
the
retain-
ing
nuts.
3. Position the wheel assembly
on
the spindle.
On trucks with
4-wheel
drive,
in-
stall
the
bearing adjusting
nut
with
the dowel outboard. Install
the ad-
justing
nut
lock
on the
dowel
and
install
the
lock
nut to
specifications.
Slide
the
driving
hub on the
axle
shaft
and
install the snap ring.
4.
Adjust
the
spindle
nut and in-
stall
the
cotter
pin.
5. Adjust
the
brake,
and
then
torque
the
wheel
nuts.
6. Install the dust cap
or hub
cap.
7.
Remove
the
stands
and
lower
the truck.
REAR BRAKE DRUM
REMOVAL
1. Raise
the
truck
so
that
the
wheel
is
clear
of the
floor.
2.
Remove the
hub cap and
wheel
and tire assembly. Remove
the
three
Tinnerman nuts
and
remove
the
brake drum.
If
the
brake drum will
not
come
off,
insert
a
narrow screw driver
through
the
brake adjusting hole
in
the carrier plate,
and
disengage
the
adjusting lever from
the
adjusting
screw. While thus holding
the ad-
justing lever away from
the
adjust-
ing screw, back
off the
adjusting
screw with
the
brake adjusting tool
(Fig.
3). Back
off the
adjustment
only if the drum cannot
be
removed.
Be very careful
not to
burr, chip,
or
damage
the
notches
in the
adjusting
screw; otherwise,
the
self adjusting
mechanism will
not
function prop-
erly.
FIG.
3—Backing
Off Brake
Adjustment
INSTALLATION
1. Place
the
drum over the brake
assembly
and
into position. Install
the three Tinnerman nuts
and
tighten
securely.
If it
was
necessary
to
back off
the
brake adjustment,
in
step
2
above,
adjust
the
brakes
as
outlined
in
Sec-
tion
2.
2.
Install
the
wheel
and
tire
as-
sembly
and hub cap.
BRAKE SHOE AND
ADJUSTING SCREW
REMOVAL
1. With
the
wheel
and
drum
re-
moved, install
a
clamp over the ends
of
the
brake cylinder
as
shown
in
Fig.
4.
2.
Contract
the
shoes
as
follows:
a. Disengage
the
adjusting lever
from
the
adjusting screw
by
pulling
backward
on the
adjusting lever
(Fig.
1).
b.
Move
the
outboard side
of the
adjusting screw upward
and
back
off
the pivot
nut as far as
it will
go.
3. Pull
the
adjusting lever, cable
and automatic adjuster spring down
and toward
the
rear
to
unhook
the
pivot hook from
the
large hole
in
the secondary shoe web.
Do not at-
tempt
to pry the
pivot hook
out of
the hole.
4.
Remove
the
automatic adjuster
spring
and
adjusting lever.
On front brakes, remove
the
shoe
retracting assist spring.
5. Remove
the
secondary shoe
to
anchor spring with the tool shown
in
Fig.
4.
With
the
same tool, remove
FIG.
4—Retracting
Spring
Removal
the primary shoe
to
anchor spring
and unhook the cable anchor.
6. Remove
the
cable guide from
the secondary shoe (Fig.
1).
7.
Remove
the
shoe hold-down
springs,
shoes, adjusting screw, pivot
nut,
and
socket.
8.
On
rear brakes, remove
the
parking brake link
and
spring.
Dis-
connect
the
parking brake cable
from
the
parking brake lever.
9. After removing
the
rear brake
secondary shoe, disassemble
the
parking brake lever from
the
shoe
by removing
the
retaining clip
and
spring washer (Fig.
1).
INSTALLATION
1. Before installing the rear brake
shoes,
assemble
the
parking brake
lever
to the
secondary shoe
and se-
cure with
the
spring washer
and re-
taining clip.
2.
Apply
a
light coating
of
high-
temperature grease
at the
points
where
the
brake shoes contact
the
carrier plate.
3. Position the brake shoes
on the
carrier plate,
and
install
the
hold-
down spring
pins,
springs,
and
cups.
On
the
rear brake, install
the
park-
ing brake link
and
spring. Connect
the parking brake cable
to
the park-
ing brake lever (Fig.
1).
4.
Place the cable anchor over
the
anchor
pin
with
the
crimped side
toward
the
carrier plate.
5. Install
the
primary shoe
to an-
chor spring with
the
tool shown
in
Fig.
5.
6. Install
the
cable guide
on the
secondary shoe
web
with the flanged
FIG.
5—Retracting
Spring
Installation
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