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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.
the front shoe, pushing it against the brake drum. The
B
force applied to the front and rear shoes is approximately
equal. As the shoes contact the moving brake drum, the
shoes try to move in the direction of drum rotation. This
movement results in the typical brake shoe wear patterns.
Equalizer Link
The equalizer link balances braking between the driver
and passenger sides of the vehicle. Variations in wheel
brake adjustment, cable friction and manufacturing toler-
ances may cause the equalizer to be slightly misaligned.
This misalignment is normal.
Automatic Adjuster Mechanism
Never manually adjust the brakes at
the star wheel. Doing so will cause
permanent damage to the adjuster
assembly and result in a gradual loss of brakes.
The wheel brakes are equipped with an automatic
adjuster mechanism that is designed to compensate for
brake shoe wear and eliminate the need for manual brake
shoe adjustment. The brake adjuster is activated by
movement of the lever attached to the brake cable.
How the Parking Brake Works
The parking brake is operated by a smaller pedal which
extends across the top of the brake pedal. It is spring
loaded and attached to the brake pedal with a hinge pin
(Figure 2).
Pressing the parking brake pedal moves the latch arm
against the catch bracket attached to the chassis. As the
parking brake is pressed, the brake is applied until the
notch in the latch arm engages with the catch bracket.
The brake pedal is held in the applied (down) position by
the catch bracket.
The latch arm is held in position by tension in the brake
linkage. The parking brake can be released by two meth-
ods:
1.
Pressing the brake, which permits the spring loaded
parking brake pedal to return to its original position,
disengages the latch arm from the catch bracket.
This is the preferred method because it minimizes
wear on components.
2.
Pressing the accelerator pedal rotates the kick-off
cam and forces the pedal latch arm to move away
from the catch bracket. The spring loaded parking
brake pedal returns to its original position, releasing
brake.
42
Pedal Latch Arm
Accelerator
Pedal
Kick-Off Cam
Figure 2 Parking Brake and Kick-Off Mechanism
Kick-Off Actuating Linkage
The kick-off actuating linkage may require adjustment to
compensate for the normal wear. Replacement of any
linkage components will also require an adjustment.
Compensator Assembly
The compensator assembly contains a spring, which is
compressed until the stop tube within the spring is
engaged and the linkage becomes solid (Figure 3). The
brake compensator assembly applies a spring load to the
parking brake system and ensures that the parking brake
remains under tension when it is engaged.
Figure 3 Compensator Assembly
Repair and Service Manual
Pedal Latch Arm
Catch Bracket
Pedal Bumper
Spring
Stop Tube
653045
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