Maintenance, Service, and Repair
Brake Service
Page 2
AUTO-ADJUST BRAKE MECHANISM
THEORY OF OPERATION
The auto-adjust mechanism is located on the bottom of the brake assembly. As the brake pad material wears down, the
distance the brake shoes travel to engage the brake drum becomes longer. When the travel becomes long enough, the brake
lever engages the auto-adjust lever and causes it to index a tooth on the star wheel adjuster. This rotates the adjuster, which
decreases the travel needed for the brake shoes to engage the brake drum.
NOTE: There are no manual adjustments for the brake shoes.
NOTE: The symptom of a low brake pedal may indicate that the auto adjuster is not working or the brake linkage is not
adjusted properly. Remove the vehicle from service and repair the brakes.
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