Page E-7
Repair and Service Manual
B
B
BRAKES
Read all of Section B and this section before attempting any procedure. Pay particular attention to Notices, Cautions, Warnings and Dangers.
Remove parking brake strut and lever.
Remove shoe hold-down springs and remove shoes.
If the wheel cylinder must be removed, begin by loosen-
ing and removing the brake line from the back of the
wheel cylinder. Next remove the wheel cylinder bolts and
remove the wheel cylinder from the backing plate.
Cleaning and Inspection
The drum must not be turned to ‘true’ a worn
friction surface. Turning will make the drum
too thin causing drum and brake failure which
could cause severe injury or death.
A backing plate assembly that shows any indi-
cation of galling or gouging is not repairable
and must be replaced with a new wheel brake
assembly. Always replace wheel brake
assemblies in pairs.
Inspect the brake drum. Look for a blue coloration or
blistered paint that would indicate that it has overheated.
Check for evidence of scoring. Check for excessive wear
indicated by the friction surface being significantly worn
and leaving a ledge of unworn drum. Inspect the splines
for galling, wear and corrosion. If any of these problems
are found, the drum must be replaced.
Visually inspect the axle seal for oil leakage and the con-
dition of the thrust washer. If oil is present, see REAR
AXLE section.
Verify the inner brake drum washer is present and check
its condition. Replace if damaged or missing.
Clean the backing plate with an approved cleaner for this
purpose.
Inspect the backing plate. Inspect for gouges, galling or
other damage, particularly where the backing plate is
contacted by the brake shoes. Be sure shoe ledges are
smooth and free of rough edges. Replace both wheel
brake assemblies if any gouges or galling is found.
Measure the brake shoe thickness. Measure at the most
worn area. Brake shoe thickness must never be less
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.
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 re-
assembly.
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.
ROUTINE MAINTENANCE
Tool List
Qty.
Shop Rag ................................................................ A/R
Mechanics Mirror......................................................... 1
Flashlight ..................................................................... 1
Transmission Fluid Funnel .......................................... 1
Torque Wrench ft. lbs .................................................. 1
Torque Wrench in. lbs.................................................. 1
Crows Foot 9/16”......................................................... 1
Open end Wrenches 3/8”,
1/2”, 5/8”, 9/16” ................. 1
Needle Nose Pliers ..................................................... 1
Ratchet ........................................................................ 1
Sockets 3/8”,
1/2”, 5/8”, 9/16”...................................... 1
Micrometer/Vernier Caliper ......................................... 1
2” C Clamp .................................................................. 1
Floor Jack.................................................................... 1
Jack Stands ................................................................. 1
Ball Joint Separator ..................................................... 1
Lug Wrench, 3/4"......................................................... 1
Jack ............................................................................. 1
Jack stands ................................................................. 4
Brake adjusting tool..................................................... 1
Plastic faced hammer.................................................. 1
