Page D-8
Repair and Service Manual
B
BRAKES
Read all of Section B and this section before attempting any procedure. Pay particular attention to Notices, Cautions, Warnings and Dangers.
than .06" (1.5 mm) at any point on the shoe. It is normal
for the shoes to show more wear at the leading and trail-
ing edges. If the brake shoe thickness is approaching
.06" (1.5 mm), it is recommended that the shoes be
replaced. It is recommended that the brake shoe springs
and brake adjusters be replaced when installing new
brake shoes
Check springs for loss of tension and damage. Replace
weak springs and any damaged or badly worn parts.
Check adjuster operation. Insure that each adjuster will
move with approximately 30 - 50 in. lbs. (3.4 - 5.6 Nm) of
torque. If adjusters are frozen, badly worn or loose,
replace the adjuster assembly. See ‘Replacing an
Adjuster’ on page D-8.
Replace the wheel cylinder if there is any sign of leak-
age.
Insure that the parking lever and strut assembly can be
easily moved by hand. If necessary, this assembly can
be serviced as follows:
Disassemble by removing the C-clip. Wire brush contact
surfaces to remove any corrosion and contaminants.
Lightly grease the pin and contact surfaces before reas-
sembly.
Insure that the C-clip is completely seated in
its' groove when finished. Failure to do so
could result in a non-functioning parking brake
if the clip comes off.
Reassembly
Apply a light coat of high temperature lubricant to shoe
support points on the backing plate, to adjuster pin, and
to anchor.
Position the adjusters so that the pins are at the 12
o'clock position.
If the wheel cylinder was removed, install it now into the
backing plate. Insert and tighten the wheel cylinder
mounting bolts to 120 in. lbs. (14 Nm) torque. Reconnect
and tighten the brake fluid line to 124 - 177 in. lbs. (14 -
20 Nm) torque.
Position shoes on backing plate and install hold-down
springs.
Install parking brake strut with tab on strut engaged in
brake shoe web.
Place upper end of shoe webs against wheel cylinder,
and install upper shoe-to-shoe spring. Remove wheel
cylinder clamp.
Install lower shoe-to-shoe spring.
Install wheel and drum. See ‘BRAKE DRUM REMOVAL
AND INSTALLATION’ on page D-5.
Pre-adjust shoes by rotating adjuster nut away from the
axle until shoes contact drum and then back off just
enough to eliminate drag.
Replacing an Adjuster
Replace the adjuster assembly if the adjuster requires
more than 50 in. lbs. (5.6 Nm) torque to rotate.
Secure the adjuster arm with locking pliers and remove
the bolt on the back side of the backing plate with a
wrench or socket. The bolt may shear off which is
acceptable. Remove and discard all adjuster compo-
nents.
Clean the backing plate surfaces that contact with the
adjuster.
Prepare to install the new adjuster by applying a light
coat of grease to the belleville washer. Install the washer
onto the adjuster arm with arch up as shown in the illus-
tration (Ref Fig. 6 on page D-8)
.
Fig. 6 Installing Belleville Washer
Apply thread locking compound to the bolt. Insert the
nose of the tube nut into the backing plate. Install the
bolt into the tube nut and tighten to 110 - 120 in. lbs. (12
- 14 Nm) torque.
Although not strictly necessary, it is recommended to
replace both adjusters if one is found to require replace-
ment.
Install Belleville
Washer With
Arch Up As
Shown
Adjuster
Tube
Nut
Backing
Plate
Bolt
Washer
Summary of Contents for 625619 2012
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