Alero, Grand Am 1999-2005

Brake Shoes

Print

Adjustment




NOTE
This procedure requires the use of Special Tool J 21177-A Drum-to-Brake Shoe Clearance Gage, or equivalent tool.

  1. Raise and support the vehicle.
  2.  
  3. Remove the rear wheels and tires.
  4.  
  5. Remove the rear drums.
  6.  
  7. Set the Drum-to-Brake Shoe Clearance Gauge, tool J 21177-A, so that the tool contacts the inside diameter of the drum at the widest point.

    Click image to see an enlarged view

    Fig. Set the Drum-to-Brake Shoe Clearance Gauge, tool J 21177-A, so that the tool contacts the inside diameter of the drum at the widest point

  8.  
  9. Position the Drum-to-Brake Shoe Clearance Gauge over the shoes at the widest point. Turn the adjuster nut until the shoes just contact the Drum-to-Brake Shoe Clearance Gauge.

    Click image to see an enlarged view

    Fig. Position the Drum-to-Brake Shoe Clearance Gauge over the shoes at the widest point. Turn the adjuster nut until the shoes just contact the Drum-to-Brake Shoe Clearance Gauge.

  10.  
  11. Repeat steps two through five for the other rear brake assembly.
  12.  
  13. Install the rear drums.
  14.  
  15. Install the rear wheels and tires.
  16.  
  17. Lower the vehicle.
  18.  

Removal & Installation



  1. Before servicing the vehicle, refer to the precautions section.
  2.  
  3. Remove or disconnect the following:

    Wheel assembly
     
    Brake drum
     
    Upper return springs from the shoes using tool J-8057 brake spring tool
     
    Hold-down springs using J-8049 brake spring tool
     
    Shoe hold-down pins from behind the brake backing plate
     

  4.  
  5. Lift up the actuator lever for the self-adjusting mechanism and remove the actuating link. Remove the actuator lever, pivot, and the pivot return spring.
  6.  
  7. Spread the shoes apart to clear the wheel cylinder pistons and remove the parking brake strut and spring.

    Parking brake cable from the lever
     
    Shoes, still connected by their adjusting screw spring
     

  8.  
  9. With the shoes removed, note the position of the adjusting spring and remove the spring and adjusting screw.

    C-clip from the parking brake lever and the lever from the secondary shoe
     

  10.  
  11. Use a damp cloth to remove all dirt and dust from the backing plate and brake parts.
  12.  

To install:

  1. Check the backing plate attaching bolts to make sure they are tight. Use fine emery cloth to clean all rust and dirt from the shoe contact surfaces on the plate and lubricate with brake grease. Check the wheel cylinder for signs of leakage.

    Click image to see an enlarged view

    Fig. Drum brake components, exploded view

  2.  
  3. Clean all parts completely in brake solvent and air dry. Clean the backing plate shoe contact points.
  4.  
  5. Inspect the inside of the brake drum. If worn, heavily grooved or if the opening is distorted, the drum should be refinished or replaced.
  6.  
  7. Inspect the brake shoe springs and self-adjuster mechanism. Disassemble the adjuster mechanism and clean the threads and coat with grease. Make sure the adjuster assembly turns freely before installing in the vehicle.
  8.  
  9. Install or connect the following:

    Parking brake lever on the secondary shoe and secure with C-clip
     
    Adjusting screw and spring on the shoes, connecting them together. The coils of the spring must not be over the starwheel on the adjuster. The left and right hand springs are not interchangeable.
     

  10.  
  11. Spread the shoe assemblies and connect the parking brake cable.

    Shoes on the backing plate, engaging the shoes at the top temporarily with the wheel cylinder pistons. Make sure the starwheel on the adjuster is lined up with the adjusting hole in the backing plate, if equipped.
     

  12.  
  13. Spread the shoes slightly and install the parking brake strut and spring. Make sure the end of the strut without the spring engages the parking brake lever. The end with the spring engages the primary shoe (the one with the shorter lining).

    Actuator pivot, lever and return spring
     
    Actuating link in the shoe retainer. Lift up the actuator lever and hook the link into the lever.
     
    Hold-down pins through the back of the plate using J-8057
     
    Lever pivots and hold-down springs. Install the shoe return springs using J-8049. Be careful not to stretch or distort the springs.
     

  14.  
  15. Make sure the linings are in the right place, the self-adjusting mechanism is correctly installed, and the parking brake parts are hooked up.
  16.  
  17. Measure the distance from the edge of the primary lining to the edge secondary lining, then measure the inside width of the drum. Adjust the linings by means of the adjuster so the drum will fit onto the linings.
  18.  
  19. Install the hub and bearing assembly onto the axle if removed. Torque the retaining bolts to 35 ft. lbs. (55 Nm).
  20.  
  21. Install the drum and the wheels.
  22.  
  23. Adjust the brakes. Install a rubber hole cover in the adjustment knock-out hole after the adjustment is complete. Adjust the parking brake.
  24.  
  25. Road test the vehicle and verify proper brake operation.
  26.  

  1. Before servicing the vehicle, refer to the precautions section.
    NOTE
    Brake shoe spanner and spring removal tool J 38400 is required to remove the brake components.

  2.  
  3. Remove the wheel assembly.
  4.  
  5. Remove the brake drum.
    NOTE
    Be advised to repair one rear drum brake shoe assembly at a time. This enables you to use the other drum brake shoe assembly for visual reference.

  6.  
  7. Remove the adjuster spring.
  8.  
  9. Use the brake tool to spread the top of the brake shoes to remove the adjuster assembly and the adjuster lever from the brake shoe.
  10.  
  11. Position the hook end of the brake tool under the universal spring and lightly pull the universal spring end out of the shoe web hole. Hold the universal spring while removing the brake shoe.
  12.  
  13. Position the hook end of the brake tool under the universal spring and lightly pull the universal spring end out of the shoe web hole. Hold the universal spring while removing the brake shoe.
  14.  
  15. Disconnect the park brake lever from the brake shoe by removing the retaining clip.
  16.  

To install:

  1. Connect the park brake lever to the brake shoe and install the retaining clip.
  2.  
  3. Position the hook end of the brake tool under the universal spring and lightly pull the universal spring end out while installing the brake shoe. Ensure that the universal spring properly engages the brake shoe web hole.
  4.  
  5. Position the hook end of the brake tool under the universal spring and lightly pull the universal spring end out while installing the brake shoe. Ensure that the universal spring engages the brake shoe web hole.
  6.  
  7. Use the brake tool to spread the top of the brake shoes to install the adjuster assembly and the adjuster lever to the brake shoe.
  8.  
  9. Install the adjuster spring.
  10.  
  11. Adjust the drum brake system.
  12.  
  13. Install the brake drum.
  14.  
  15. Install the wheel assembly.
  16.  
  17. Road test the vehicle.
  18.  

  1. Remove the tire and wheel assembly.
  2.  
  3. Remove the brake drum.
  4.  
  5. Remove the upper return springs from the shoes using tool J-8057 brake spring tool.
  6.  
  7. Remove the hold-down springs using J-8049 brake spring tool.
  8.  
  9. Remove the shoe hold-down pins from behind the brake backing plate.
  10.  
  11. Lift up the actuator lever for the self-adjusting mechanism and remove the actuating link. Remove the actuator lever, pivot, and the pivot return spring.
  12.  
  13. Spread the shoes apart to clear the wheel cylinder pistons and remove the parking brake strut and spring.
  14.  
  15. Disconnect the parking brake cable from the lever. Remove the shoes, still connected by their adjusting screw spring.
  16.  
  17. With the shoes removed, note the position of the adjusting spring and remove the spring and adjusting screw.
  18.  
  19. Remove the C-clip from the parking brake lever and the lever from the secondary shoe.
  20.  
  21. Use a damp cloth to remove all dirt and dust from the backing plate and brake parts.
  22.  

To install:

  1. Check the backing plate attaching bolts to make sure they are tight. Use fine emery cloth to clean all rust and dirt from the shoe contact surfaces on the plate and lubricate with brake grease. Check the wheel cylinder for signs of leakage.

    Click image to see an enlarged view

    Fig. Drum brake components, exploded view-Skylark, Malibu, Achieva, Cutlass, Grand Am

  2.  
  3. Clean all parts completely in brake solvent and air dry. Clean the backing plate shoe contact points.
  4.  
  5. Inspect the inside of the brake drum. If worn, heavily grooved or if the opening is distorted, the drum should be refinished or replaced.
  6.  
  7. Inspect the brake shoe springs and self-adjuster mechanism. Disassemble the adjuster mechanism and clean the threads and coat with grease. Make sure the adjuster assembly turns freely before installing in the vehicle.
  8.  
  9. Install the parking brake lever on the secondary shoe and secure with C-clip.
  10.  
  11. Install the adjusting screw and spring on the shoes, connecting them together. The coils of the spring must not be over the starwheel on the adjuster. The left and right hand springs are not interchangeable.
  12.  
  13. Spread the shoe assemblies and connect the parking brake cable. Install the shoes on the backing plate, engaging the shoes at the top temporarily with the wheel cylinder pistons. Make sure the starwheel on the adjuster is lined up with the adjusting hole in the backing plate, if equipped.
  14.  
  15. Spread the shoes slightly and install the parking brake strut and spring. Make sure the end of the strut without the spring engages the parking brake lever. The end with the spring engages the primary shoe (the one with the shorter lining).
  16.  
  17. Install the actuator pivot, lever and return spring. Install the actuating link in the shoe retainer. Lift up the actuator lever and hook the link into the lever.
  18.  
  19. Install the hold-down pins through the back of the plate using J-8057. Install the lever pivots and hold-down springs. Install the shoe return springs using J-8049. Be careful not to stretch or distort the springs.
  20.  
  21. Make sure the linings are in the right place, the self-adjusting mechanism is correctly installed, and the parking brake parts are hooked up.
  22.  
  23. Measure the distance from the edge of the primary lining to the edge secondary lining, then measure the inside width of the drum. Adjust the linings by means of the adjuster so the drum will fit onto the linings.
  24.  
  25. Install the hub and bearing assembly onto the axle if removed. Torque the retaining bolts to 35 ft. lbs. (55 Nm).
  26.  
  27. Install the drum and the wheels.
  28.  
  29. Adjust the brakes. Install a rubber hole cover in the adjustment knock-out hole after the adjustment is complete. Adjust the parking brake.
  30.  
  31. Road test the vehicle and verify proper brake operation.
  32.  

 
label.common.footer.alt.autozoneLogo