5.2.4 OPERATION TEST OF AUTOMATIC CLEARANCE ADJUSTER
(1) Set the outer diameter of the brake shoe to nearly the normal mounting dimension. Push up
the adjuster lever and adjust the diameter, turning the teeth of the adjuster.
When your nger is released, the teeth of the adjuster do not turn and the adjuster lever returns
to the original position.
Note: If the teeth of the adjuster return with the lever, they are adjusted properly after mounting
the brake system on the truck.
(2) If the operation described above does not occur by pushing up the adjuster lever, take the
following measures:
(a) Check that the adjuster lever, adjuster, adjuster spring, adjuster cable and shoe return spring
are securely installed.
(b) Check the shoe return spring and adjuster spring for deterioration, the adjuster for rotation,
damaged tooth or damage of the contact area with the teeth of the adjuster lever, and replace
any defective parts.
Fig. 5.28
Expanding part
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