Brake Service - Cherokee-Wagoneer-Truck Models - Jeep 1979 CJ-5 Technical & Service Manual

2G-36 BRAKES
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(15) Install rear wheels and tires.
(16) Lower vehicle.
(17) Check brake operation before moving vehicle.
(18) Drive vehicle in reverse and make 10 to 15 firm
brake applications to complete brake adjustment. Make
one forward brake application after each reverse appli-
cation to equalize adjustment.
NOTE: If the vehicle has an automatic transmission,
do not use the forward range to halt vehicle movement
in reverse. This procedure will prevent the automatic
adjuster mechanism from operating properly resulting
in unsatisfactory pedal heights. All stops must be
completed.
BRAKE SERVICE—CHEROKEE-WAGONEER-TRUCK MODELS
WARNING: When servicing wheel brake units, do not
create dust by grinding or sanding brakelinings or by
cleaning wheel brake parts with a dry brush or with
compressed air. Use water dampened cloths only to re-
move dirt and dust from brake parts prior to dis-
assembly. Many wheel brake parts contain asbestos
fibers which can become airborne if dust is created dur-
ing servicing operations. Breathing dust containing as-
bestos fibers may cause serious bodily harm.
Disassembly
(1) Raise vehicle.
(2) Remove rear wheels and drums.
(3) Release parking brake and loosen locknuts at
parking brake equalizer to relieve cable tension before
removing rear drums.
(4) On Truck models with Model 60 full-floating
rear axle, remove two screws that locate rear drums on
hubs (fig. 2G-25).
(5) Remove primary brakeshoe return spring (fig.
2G-28).
J41135
Fig. 20-25
Brake D r u i Locating Screw Removal—Model 60 Axle
(6) Remove automatic adjuster actuating spring
and secondary brakeshoe return spring using Spring
Remover Tool J-8057.
(7) Remove holddown s p r i n g s and remove
brakeshoes.
(8) Disengage parking brake cable from parking
brake lever on secondary brakeshoe.
(9) Place Wheel Cylinder Clamps J-8002 over wheel
cylinders to retain pistons (fig. 2G-26).
SUPPORT PLATE
Fig 2G-26 Wheel Cylinder Clamps Installed
Cleaning and Inspection
Inspect brakelining wear. Replace riveted lining if it is
worn to within 1/32 inch (0.79 mm) of the rivet heads.
Replace bonded lining if it is worn to a total thickness of
approximately 1/16 inch (1.58 mm) or less.
Inspect the lining wear pattern. If wear is uneven
across the width of the lining, replace the lining and
check the drum for distortion and runout. Inspect the
lining for cracks, charred surface, or broken rivets. Re-
place the lining if contaminated with brake fluid, axle
lubricant, or similar contaminants or if the lining exhib-
its any of the conditions described previously.
Inspect the adjusting screw spring, return springs,
holddown springs, actuating lever return spring, and
automatic adjuster spring. Replace any springs that are
distorted, broken, discolored (overheated), or lack
tension.
Inspect the parking brake lever, automatic adjuster
lever and pivot, and actuating lever for wear and de-
fects. Replace levers if bent, broken, or excessively
worn.
Inspect the adjusting screw pivot and screw threads.
The screw must rotate freely. Inspect the screw serra-
tions for excessive wear which could effect automatic
adjustment.