Isuzu Ascender 2003-05

Parking Brake Shoes

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Adjustment



  1. Adjust parking brake shoes by using brake shoe clearance gauge.
  2.  
  3. Install brake shoe clearance gage and adjust, until it contacts the inside diameter of the rotor (1).

    Click image to see an enlarged view

    Fig. Clearance gage and rotor

  4.  
  5. Position the gage over the park shoe lining, left side shown, at the widest point (1).
  6.  
  7. Turn the adjuster nut until the lining just contacts the gage.
  8.  
  9. Repeat steps 1 through 3 to adjust the right rear park brake.
    NOTE
    The clearance between the rear park brake shoe lining and the rotor should be 0.010 inch. (0.25 mm) or .020 inch. (0.50 mm) total.



    Click image to see an enlarged view

    Fig. Clearance gage and parking brake shoes

  10.  

Removal & Installation



  1. Release the park brake, if applied.
  2.  
  3. Raise and the vehicle.
  4.  
  5. Remove the rear wheel and tire assembly.
  6.  
  7. Remove the brake caliper and bracket.

    Click image to see an enlarged view

    Fig. Brake caliper and bracket removal

  8.  
  9. Remove the brake rotor.

    Click image to see an enlarged view

    Fig. Brake rotor removal

  10.  
  11. Remove the park brake cable from the park brake lever.

    Click image to see an enlarged view

    Fig. Park brake cable removal

  12.  
  13. Slide the park brake shoe (2) down until it is disengaged from the hold down spring (3).
  14.  
  15. Lift the shoe (2) away from the backing plate and slide the shoe up, off of the actuation mechanism (1).
  16.  
  17. Remove the shoe (2) over the axle flange and from the vehicle.
  18.  
  19. Clean the debris and the dust from the park brake components using a clean towel.
  20.  
  21. Turn the adjustment screw to the fully home position in the notched adjustment nut, then back it off 1/4 turn.
  22.  
  23.  Align the slots in both the adjusting screw and tappet to be parallel with the backing plate face.
  24.  
  25. Using denatured alcohol, clean the rear backing plate of dirt and foreign materials.
  26.  
  27. Using non-lubricated, filtered air, dry the backing plate.

    Click image to see an enlarged view

    Fig. Parking brake shoes and related parts

  28.  

To install:

  1. Install a new park brake shoe (2) over the axle flange.
  2.  
  3. Position the shoe (2) on the actuation mechanism.
  4.  
  5. Holding the lower end of the shoe (2) away from the backing plate, slide the shoe down, over the top of the hold down spring (3).
  6.  
  7. Place the lower end of the shoe (2) against the backing plate.
  8.  
  9. Slide the shoe (2) up and under the hold down spring (3).
  10.  
  11. Inspect the position of the shoe assembly . The shoe must be central on the backing plate and with both tips located in the slots of the actuation mechanism (1).
  12.  
  13. Manually check the park brake for proper operation by moving the park brake actuator lever and observing the movement of the actuation mechanism.

    Click image to see an enlarged view

    Fig. Parking brake shoes and related parts

  14.  
  15. Install the park brake cable to the park brake lever.
  16.  
  17. Adjust parking brake shoes by using brake shoe clearance gauge.
  18.  
  19. Install brake shoe clearance gage and adjust, until it contacts the inside diameter of the rotor (1).

    Click image to see an enlarged view

    Fig. Clearance gage and rotor

  20.  
  21. Position the gage over the park shoe lining, left side shown, at the widest point (1).
  22.  
  23. Turn the adjuster nut until the lining just contacts the gage.
  24.  
  25. Repeat steps 1 through 3 to adjust the right rear park brake.
    NOTE
    The clearance between the rear park brake shoe lining and the rotor should be 0.010 inch. (0.25 mm) or .020 inch. (0.50 mm) total.



    Click image to see an enlarged view

    Fig. Clearance gage and parking brake shoes

  26.  
  27. Install rear brake rotor.
  28.  
  29. Install the brake caliper and mounting bracket.
  30.  
  31. Install the tire and wheel.
  32.  
  33. Lower the vehicle.
  34.  

 
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