Rendezvous 2006-2007

Brake Shoes

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Adjustment



  1. Raise and support the vehicle.
  2.  
  3. Remove the rear wheels and tires.
  4.  
  5. Relieve cable tension from the park brake system at the equalizer. there should be no tension on the park brake cables, so that the brake shoes are positioned only by the adjuster strut.
  6.  
  7. Remove the rear drums.
  8.  
  9. Set the J 21177-A so that the J 21177-A contacts the inside diameter of the drum at the widest point.
  10.  
  11. Position the J 21177-A over the shoes at the widest point.
  12.  
  13. Turn the adjuster nut until the shoes just contact the J 21177-A .
  14.  
  15. Repeat steps 2-7 for the other rear brake assembly.
  16.  
  17. Install the rear drums..
  18.  
  19. Install the rear wheels and tires.
  20.  
  21. Adjust the park brake cable system.
  22.  
  23. Lower the vehicle.
  24.  

Removal & Installation




CAUTION
Dust and dirt accumulating on brake parts during normal use may contain asbestos fibers from production or aftermarket brake linings. Breathing excessive concentrations of asbestos fibers can cause serious bodily harm. Exercise care when servicing brake parts. Do not sand or grind brake lining unless equipment used is designed to contain the dust residue. Do not clean brake parts with compressed air or by dry brushing. Cleaning should be done by dampening the brake components with a fine mist of water, then wiping the brake components clean with a dampened cloth. Dispose of cloth and all residue containing asbestos fibers in an impermeable container with the appropriate label. Follow practices prescribed by the Occupational Safety and Health Administration (OSHA) and the Environmental Protection Agency (EPA) for the handling, processing, and disposing of dust or debris that may contain asbestos fibers.

  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Raise and support the vehicle.
  4.  
  5. Remove the brake drum.
    NOTE
    Do not over stretch the adjuster spring. Damage can occur if the spring is over stretched.

  6.  
  7. Disengage the adjuster spring hook end from the tab on the adjuster actuator.
  8.  
  9. Remove the straight end of the adjuster spring from the brake shoe.
  10.  
  11. Remove the adjuster actuator from the brake shoe.
  12.  
  13. Remove the return spring from the brake shoes.
  14.  
  15. Remove the park brake cable from the park brake actuator lever.
  16.  
  17. Remove the brake shoe hold-down springs and retainers from the brake shoes.
  18.  
  19. Remove the adjuster from the brake shoes and the park brake actuator lever.
  20.  
  21. Remove the horseshoe clip retaining the park brake actuator lever to the brake shoe.
  22.  
  23. Remove the park brake actuator lever and wave washer from the brake shoe.
  24.  
  25. Clean all of the drum brake system components with denatured alcohol.
  26.  
  27. Inspect all of the drum brake system components.
  28.  
  29. Replace drum brake system components as necessary.
  30.  
  31. Inspect the wheel cylinder for the following conditions:

    Brake fluid leakage
     
    Worn or damaged dust boots
     

  32.  
  33. Replace damaged or leaking wheel cylinders as necessary.

    Click image to see an enlarged view

    Fig. Drum brakes

  34.  

To install:

  1. Apply GM P/N 1052196 (Canadian P/N 5264008) brake lubricant, or equivalent, to the following areas:

    The brake shoe contact points on the backing plate
     
    The adjuster screw threads
     
    The inside diameter of the adjuster socket
     

  2.  
  3. Install the park brake actuator lever and wave washer to the brake shoe.
  4.  
  5. Install the horseshoe clip to the park brake actuator lever pivot pin.
  6.  
  7. Install the brake shoes to the brake backing plate.
  8.  
  9. Install the brake shoe hold-down pins, springs and retainers to the brake shoes.
  10.  
  11. Install the park brake cable to the park brake actuator lever.
    NOTE
    Ensure that the adjuster engages the brake shoe and the park brake actuator properly.

  12.  
  13. Install the adjuster screw to the brake shoe and the park brake actuator.
  14.  
  15. Apply GM P/N 1052196 (Canadian P/N 5264008) brake lubricant or equivalent to the adjuster actuator/brake shoe interface.
  16.  
  17. Install the adjuster actuator to the brake shoe.
    NOTE
    Do not over stretch the adjuster spring. Damage can occur if the spring is over stretched.

  18.  
  19. Install the straight end of the adjuster spring to the brake shoe.
  20.  
  21. Install the adjuster spring hook end to the tab on the adjuster actuator.
  22.  
  23. Install the return spring to the brake shoes.
    NOTE
    Ensure that the adjuster operates properly.

  24.  
  25. Move the park brake actuator lever in order to spread the brake shoes apart. The adjuster actuator lever should move downward, then upward as the park brake actuator lever is released, forcing the adjuster wheel to rotate. If the adjuster does not operate properly, remove then reinstall the adjuster.
  26.  
  27. Adjust the brake shoes.
  28.  
  29. Adjust the park brake cable.
  30.  
  31. Install the brake drum.
  32.  
  33. Lower the vehicle.
  34.  

 
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