2-28
GROUP 2 - Brakes
through the bracket. Remove the clips
retaining the right cable to the frame
crossmember.
4.
Remove the rear wheel cover
and wheel. Remove the three Tinner-
man nuts that hold the brake drum
in place and remove the drum.
5.
Working on the wheel side of
the rear brake, remove the automatic
brake adjuster spring. Compress the
prongs on the parking brake ca-
ble retainer so that they can pass
through the hole in the brake back-
ing plate. Draw the cable retainer
through the hole.
6. With the spring tension off the
parking brake lever, lift the cable
out of the slot in the lever and remove
the cable through the backing plate
hole.
INSTALLATION
1.
Pull enought of the parking
brake cable through the housing so
that the end of the cable may be in-
serted over the slot in the parking
brake lever on the rear brake shoe.
2.
Pull the excess slack from the
cable, and insert the cable housing
into the brake backing plate access
hole so that the retainer prongs ex-
pand. The prongs must be securely
locked in place. Install the automat-
ic brake adjuster spring.
3.
Position the right hand cable and
the two retaining clips and screws on
the rear crossmember. Compress the
prongs on the right cable and position
the cable in the retaining bracket on
the frame side member. Tighten all
retaining clip screws.
4.
Position the left cable, retaining
clip and screw on the left lower sus-
pension arm. Compress the prongs on
the left cable and position the cable
through the frame side-member. The
prongs must be securely locked in
place.
5.
Insert the ball ends of the cables
into the equalizer assembly.
6. Install the rear drum(s) and
tighten the three Tinnerman nuts that
secure the drum. Install the wheel and
tire and the wheel cover.
7.
Adjust the parking brake link-
age as outlined in Part 2-1, Section 2.
Adjust the rear brakes, as required
(Part
2-1,
Section 2).
MAJOR REPAIR OPERATIONS
BRAKE DRUM REFINISHING
Minor scores on a brake drum can
be removed with sandpaper. A drum
that is excessively scored or shows a
total indicator runout of over 0.007
inch should be turned down. Remove
only enough stock to eliminate the
scores and true up the drum. The re-
finished diameter must not exceed
0.060 inch oversize (11.090 inches).
If the drum diameter is less than
0.030 inch oversize (11.060 inches)
after refinishing, standard lining may
be installed. If the drum diameter is
11.060-11.090 inches, oversize linings
must be installed.
After a drum is turned down, wipe
the refinished surface with a cloth
soaked in clean denatured alcohol. If
one drum is turned down, the oppo-
site drum on the same axle should
also be cut down to the same size.
ROTOR REFINISHING
Rotunda Disc Brake Attachment,
FRE-2249-2, is the only recommended
tool to refinish the disc brake rotors.
The step-by-step resurfacing procedure
provided with the tool must be adhered
to.
The finished braking surfaces of the
rotor must be flat and parallel within
0.0007 inch; lateral runout must not
exceed 0.002 inch total indicator read-
ing, and the surface finish of the
braking surfaces are to be 85/15
micro inches. The minimum limiting
dimensions (Fig. 8, Part 2-1) from the
inboard bearing cup to the outboard
rotor face (dimension A) and from
the inboard bearing cup to the in-
board rotor face (dimension B)
must be observed when removing
material from the rotor braking sur-
faces.
BRAKE SHOE RELINING
Brake linings that are worn to
within 1/32 inch of the rivet head or
are less than 0.030 inch thick (bonded
lining) or have been contaminated
with brake fluid, grease or oil must
be replaced. Failure to replace worn
linings will result in a scored drum.
When it is necessary to replace linings,
they must also be replaced on the wheel
on the opposite side of the vehicle.
Inspect brake shoes for distortion,
cracks, or looseness. If this condition
exists,
the shoe must be discarded.
Do not attempt to repair a defective
brake shoe.
1.
Wash the brake shoes thoroughly
in a clean solvent. Remove all burrs
or rough spots from the shoes.
2.
Check the inside diameter of the
brake drum with a brake (jrum mi-
crometer (tool FRE-1431). If the
diameter is less than 11.030 inches,
standard lining may be installed. If
the diameter is 11.060-11.090 inches,
oversize lining should be installed.
3.
Position the new lining on the
shoe.
Starting in the center, insert
and secure the rivets, working alter-
nately towards each end. Replacement
linings are ground and no further
grinding is required.
4.
Check the clearance between
the shoe and lining. The lining must
seat tightly against the shoe with not
more than 0.008 inch clearance be-
tween any two rivets.
DUAL MASTER CYLINDER
DISASSEMBLY
1.
Clean the outside of the master
cylinder and remove the filler cover
and diaphragm. Pour out any brake
fluid that remains in the cylinder.
2.
Remove the secondary piston
stop bolt from the bottom of the cyl-
inder (Figs. 25 and 26).
3.
Remove the bleed screw, if re-
quired.
4.
Remove the snap ring from the
retaining groove at the rear of the
master cylinder bore (Fig. 27). Re-
move the push rod and the primary
piston assembly from the master cyl-
inder bore. Do not remove the screw
that retains the primary return spring
retainer, return spring, primary cup
and protector on the primary piston.
This assembly is factory pre-adjusted
and should not be disassembled.
5.
Remove the secondary piston
assembly. Do not remove the outlet
tube seats, outlet check valves and out-
let check valve springs from the
master cylinder body.
INSPECTION AND
REPAIR
1.
Clean all parts in clean dena-
tured alcohol, and inspect the parts
for chipping, excessive wear or dam-
age.
Replace them as required. When
using a master cylinder repair kit,
install all the parts supplied.
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