B
96
Repair and Service Manual
BRAKES
Read all of SAFETY and this section before attempting any procedure. Pay particular attention to Notices, Cautions, Warnings and Dangers.
699324
against the brake drum. When the rear shoe contacts the
brake drum, it can no longer move rearward. Additional
pedal (and cable) travel causes the actuator bracket
(moving anchor) to move and applies force to the front
shoe, pushing it against the brake drum. The 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. Do not manually adjust the brakes by
prying back the adjuster arm and turning the star wheel.
Permanent damage to adjuster will result.
Adjustment takes place only when the brake is fully
applied and released
while the vehicle is moving
(Fig-
ure 2). It is very important that the brake cables permit the
brake levers to release fully when the brake pedal is in
the released position.
Figure 2 Wheel Brake Adjustment
Brakes adjust only while the vehicle is moving. When the
brake pedal is depressed, the brake lever moves toward
the front of the vehicle (A).
The other end of the brake lever moves to the rear of the
vehicle (B) where it contacts the brake adjuster arm,
causing it to move.
The brake adjuster arm moves away from the star wheel
(C). The amount of adjuster travel is limited by the
amount of brake shoe travel required to contact the brake
drum. The amount of travel increases as the brake shoe
lining wears.
When the brake pedal is released, the adjuster spring
retracts the brake adjuster arm which contacts the star
wheel. Note that adjustment only takes place when the
brake pedal is released while the vehicle is in motion.
If the brake shoes have worn far enough to permit the
brake adjuster arm to contact the next tooth of the star
wheel, the star wheel will be advanced by the tension
applied to the adjuster arm by the adjuster spring.
If the brake shoes have not worn enough to permit the
brake adjuster arm to contact the next tooth of the star
wheel, the brake adjuster arm will move on the flat of the
star wheel. The star wheel does not rotate and no adjust-
ment occurs.
How the Parking Brake Works
The parking brake is operated by a smaller pedal which
extends across the top of the service brake pedal. It is
attached to the service brake pedal with a hinge pin and
is spring loaded (Figure 3).
A
C
Brake Lever
Brake Adjuster Arm
Star Wheel
Adjusting Screw
Adjuster Spring
Brake
Shoe
B
Summary of Contents for TRACKER LX6 EFI
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