GM Buick/Oldsmobile/Pontiac/Full-Size 1975-1990 Repair Guide

Brake Drum

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See Figure 1

REMOVAL & INSTALLATION



  1. Raise and support the vehicle with jackstands.
  2.  
  3. Remove the wheel or wheels.
  4.  
  5. Pull the brake drum off. It may be necessary to gently tap the rear edges of the drum to start it off the studs.
  6.  
  7. If extreme resistance to removal is encountered, it will be necessary to retract the adjusting screw. Knock out the access hole in the brake drum and turn the adjuster to retract the linings away from the drum. If this does not release the drum completely, use a rubber mallet to pound gently all around the outer edge of the drum to loosen it.
  8.  
  9. Install a replacement hole cover before reinstalling drum.
  10.  
  11. Install the drums in the same position on the hub as removed.
  12.  



Click image to see an enlarged view

Fig. Fig. 1: View of a common brake drum

INSPECTION



  1. Check the drums for any cracks, scores, grooves, or an out-of-round condition. Replace if cracked. Slight scores can be removed with fine emery cloth while extensive scoring requires turning the drum on a lathe.
  2.  
  3. Never have a drum turned more than 0.060 in. (1.5mm).
  4.  

 
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