GM Caprice 1990-1993 Repair Guide

Adjustment

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DISC BRAKES



Disc brakes are self-adjusting. No adjustment is possible or necessary. Check fluid level of reservoir, for as brake pads wear, the piston moves out and the piston void must be replaced with brake fluid.

DRUM BRAKES



See Figure 1



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Fig. Fig. 1: Cutaway view of rear brake adjuster

The drum brakes are designed to self-adjust when applied with the car moving in reverse. However, they can also be adjusted manually. This manual adjustment should also be performed whenever the linings are replaced.

  1. Use a punch to knock out the lanced area in the brake backing plate. If this is done with the drum installed on the car, the drum must then be removed to clean out all metal pieces. After adjustments are complete, obtain a hole cover to prevent entry of dirt and water into the brakes.
  2.  
  3. Use an adjusting tool especially made for the purpose to turn the brake adjusting screw star wheel. Use a small screwdriver to push the adjusting lever away from star wheel when adjusting brakes. Expand the shoes until the drum can just be turned by hand. The drag should be equal at all the wheel.
  4.  
  5. Back off the adjusting screw 12 notches. If the shoes still are dragging lightly, back off the adjusting screw one or two additional notches. If the brakes still drag, the parking brake adjustment is incorrect or the parking brake is applied. Fix and start over.
  6.  
  7. Install the hole cover into the drum.
  8.  
  9. Check the parking brake adjustment.
  10.  

 
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