Drum Brake Automatic Adjuster

Place the vehicle on a frame contact hoist with a helper in the driver's seat to apply the brakes. Raise the vehicle. Remove the adjuster access plug from the rear brake support plate automatic adjuster access hole. This will allow access to the adjuster quadrant on the automatic adjuster mechanism. Then, to eliminate the possibility of maximum adjustment, insert a small screwdriver through the access hole in the support plate and back off adjuster quadrant approximately 4 to 5 notches.
Fully apply the brake pedal which will cause the brake shoes to leave the anchor. Upon application of the brake pedal, the adjuster quadrant should move. Thus, a definite rotation of the adjuster quadrant can be observed if the automatic adjuster is working properly. If one or more adjusters do not function properly, the respective drum must be removed for adjuster mechanism servicing.