Specifications

Tool - HRE8650
FIG. 1 ]-Measuring Drum
ing the tool and the procedure de-
tailed below.
When adjusting the rear brake
shoes, check the parking brake ca-
bles for proper adjustment. Refer to
Parking Brake Linkage Adjustment,
Part 2-1, Section 2. Make sure that
the equalizer operates freely.
To adjust the brake shoes:
1. Using Rotunda Tool
HRE
8650, (Fig. I I) determine the inside
diameter of the drum braking sur-
face.
2. Reverse the tool as shown in
Fig. 12 and adjust the brake shoe
diameter to fit the gauge. Hold the
automatic adjusting lever out of en-
gagement while rotating
the adjust-
ing screw, to prevent burring the
screw slots. Make sure the adjust-
ing screw rotates freely. If neces-
sary, lubricate the adjusting screw
threads with a thin, uniform coating
of CIAZ- 19590-B Grease.
3.Rotate Tool HRE 8650
around the brake shoes to be sure
of the setting.
4. Apply a small quantity of high
temperature grease to the points
where the shoes contact the carrier
plate and anchor pin, being careful
not to get the lubricant on the linings.
5. Install the drums. Install the
Tinnerman nuts and tighten securely.
Install the wheel on the drum and
tighten the mounting nuts to specifi-
cation.
6. Complete the adjustment by ap-
ply ing the brakes several times with
a minimum of 50 Ibs pressure on the
pedal while backing the car. After
each stop, the vehicle must be moved
forward.
7. After the brake shoes have
been properly adjusted, check the
operation of the brakes by making
several stops while operating in a
forward direction.
FRONT BRAKE DRUM
REMOVAL
1. Raise the vehicle untiI the
PART 2-2-Bra ke System
FIG. 12-Measu ring Shoes
wheel and tire clear the floor. Remove
the wheel cover or hub cap, and re-
move the wheel and tire from the
drum.
2. 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.
3. Pull the hub and drum assem-
bly off the wheel spindle.
4. If the drum will not come off,
remove the rubber cover from the
brake backing plate. Insert a narrow
screwdriver through the slot and
disengage the adjusting lever from
the adjusting screw. While holding
the adjusting lever away from the
screw, back off the adjusting screw
with the brake adjusting tool (Fig.
13).
Be very careful not to burr,
chip, or damage the notches in the
adjusting screws; otherwise the self-
adjusting mechanism will not func-
tion properly.
INSTALLATION
I. If the drum is being replaced,
remove the protective coating from
the new drum with carburetor
de-
greaser; then, sand lightly and wipe
with a cloth soaked with denatured
alcohol. Install new bearings and
grease retainer. Soak the new ser-
vice-type grease retainer in light
engine oil for at least 30 minutes
before installation
if retainer is
of a leather composition. Pack the
wheel bearings, install the inner
bearing cone and roller assembly in
the inner cup, and install the new
grease retainer. See Part 3-5, Sec-
tion
4 for procedure.
If the original drum is being in-
stalled, make sure that the grease
in the hub is clean and adequate.
2. Adjust the brakes and install the
drum assembly as outlined under
Brake Shoe Adjustments in this sec-
tion.
FIG. 13- Backing Off Brake
Adiustment
3. Install the outer wheel bearing,
washer and adjusting nut.
4. Adjust the wheel bearing as out-
lined in Part 3-5, Section 2, then in-
stall the grease cap. Install the wheel
and hub cap or cover.
REAR BRAKE DRUM
REMOVAL
1. Raise the vehicle so that the
wheel is clear of the floor.
2. Remove the hub cap and wheel.
Remove the three Tinnerman nuts
and remove the brake drum. If the
drum will not come off, remove the
rubber cover from the backing plate.
Insert a narrow screwdriver through
the hole in the backing plate, and
disengage the adjusting lever from
the adjusting screws. While holding
the adjusting lever away from
the adjusting screw, back off the ad-
justing screw with the brake ad-
justing tool (Fig. 13). Be very care-
ful not to burr, chip or damage the
notches in the adjusting screw; other-
wise, the self-adjusting mechanism
will not function properly.
INSTALLATION
1. Remove the protective coating
from a new drum with carburetor
degreaser; then, sand lightly and
wipe with a cloth soaked in denatured
alcohol.
2. Adjust the brakes as outlined
under Brake Shoe Adjustments in this
section.
3. Place the drum over the brake
assembly and into position. Install
the three Tinnerman nuts and tighten
them securely. Install
the wheel on
the axle shaft flange studs against
the drum, and tighten the attaching
nuts to specifications.