GM Grand Am/Achieva/Calais/Skylark/Somerset 1985-98

Brake Drums

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REMOVAL & INSTALLATION




CAUTION
Brake shoes may contain asbestos, which has been determined to be a cancer-causing agent. Never clean the brake surfaces with compressed air! Avoid inhaling any dust from any brake surface! When cleaning brake surfaces, use a commercially available brake cleaning fluid.

See Figure 1

Click image to see an enlarged view

Fig. Fig. 1: Removing the brake drum

  1. Raise and safely support the vehicle.
  2.  

Matchmark the relationship of the wheel to the axle flange and the brake drum to the axle flange to insure proper wheel balance during installation.

  1. Remove the wheel.
  2.  
  3. Remove the drum. If the drum is difficult to remove, make sure the parking brake is released, back off the parking brake cable adjustment, and/or use a rubber mallet to tap GENTLY around the inner drum diameter of the spindle. Be careful not to deform the drum by tapping too hard.
  4.  
  5. Inspect the drum for scoring, cracking or grooving. Replace if necessary.
  6.  

To install:
  1. Install the drum, aligning the marks made on the axle flange during removal.
  2.  
  3. Install the wheel. Tighten the lug nuts to the specified torque.
  4.  
  5. Carefully lower the vehicle.
  6.  

INSPECTION



See Figure 2

Click image to see an enlarged view

Fig. Fig. 2: The maximum diameter of the brake drum is usually stamped or cast into the outside of the drum

  1. Inspect the brake drum for scoring, cracking or grooving. Light scoring of the drum not exceeding 0.020 in. (0.51mm) in depth will not affect brake operation.
  2.  
  3. Inspect the brake drum for excessive taper and out-of-round. When measuring a drum for out-of-round, taper and wear, take measurements at the open and closed edges of the machined surface and at right angles to each other.
  4.  
  5. The maximum diameter of the drum cannot exceed what is specified on the brake drum.
  6.  

 
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