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BRAKES
Read all of SAFETY and this section before attempting any procedure. Pay particular attention to Notices, Cautions, Warnings and Dangers.
If one wheel brake assembly is
B
replaced, the one on the other side
must also be replaced.
Be careful when you handle the
adjuster arm. Excessive force will
damage the adjuster and both wheel
brake assemblies will need to be replaced.
6.
Visually check the condition and operation of the
adjuster mechanism.
•
Inspect the brake lever for damage or wear. Test
the adjuster function as follows:
•
Push the front brake shoe in the direction of the
rear of the vehicle and hold in position.
•
Operate the brake lever.
•
Observe the brake adjuster arm and note if the
arm engages the star wheel and tries to rotate it
(Figure 15).
If the adjuster arm engages and turns the star wheel,
proceed. If the arm fails to engage the star wheel, it has
been damaged and both wheel brake assemblies must be
replaced.
If the adjuster arm engages the star wheel but fails to
rotate it, the adjuster assemblies must be replaced with
new color-coded adjusters. Note the location of the two
Teflon coated washers (Figure 15).
Wheel Brake
Lever
Figure 15 Adjuster Mechanism
7.
Check the condition and operation of the moving
anchor assembly (Figure 15).
Operate the brake lever to check for free motion. The
adjuster assembly and brake lever should move
smoothly from front to back on the backing plate. If
the moving anchor assembly is damaged or jams
against the backing plate, replace both wheel brake
assemblies.
A backing plate assembly that
shows any indication of galling or
gouging is not repairable and must
50
Brake Adjuster
Arm
Adjusting
Screw
Star
Wheel
be replaced with a new wheel brake assembly.
Always replace wheel brake assemblies in pairs.
8.
Inspect the backing plate.
Inspect for gouges, galling or other damage, particu-
larly where the backing plate is contacted by the
brake shoes and by the moving anchor assembly.
Replace both backing plates if any gouges or galling
is found.
9.
Measure the brake shoe thickness.
Measure 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 trailing edges (Figure 26). If
the brake shoe thickness is approaching .06" (1.5
mm), the shoes should be replaced. The brake shoe
springs and brake adjusters should be replaced
when installing new brake shoes.
10. Inspect the brake shoe springs.
Ensure springs are not broken or damaged and are
correctly installed. The springs must be inserted
with the light spring at the bottom. The long hook is
installed down through the rear brake shoe. The
heavier top spring is installed with the spring hooks
facing up. The heavy top spring is installed with both
spring hooks installed down through the brake shoes
(Figure 17).
The pattern of normal brake shoe wear is shown in quad-
rant A, B, C & D with quadrant A showing the most wear.
Quadrant B will show the second most wear.
11. Repeat procedure at the opposite wheel brake.
12. Check/adjust brake pedal free travel.
When the brake system is serviced or require parts
replaced, the brake pedal free travel must be
checked and adjusted. See Adjusting Brake Pedal Free
Travel. This includes all linkage and wheel brake
components.
Repair and Service Manual
653045
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