GM Cadillac Deville_Fleetwood_ELD_Seville 1990-1998

Brake Shoes

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INSPECTION




CAUTION
Older brake pads or shoes may contain asbestos, which has been determined to be 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.

Inspect the brake shoes every 6000 miles and any time the wheels are removed. When any lining thickness is worn to within 1 / 32 in. (0.76mm) of the backing plate or rivet, the shoes must be replaced in axle sets.

REMOVAL & INSTALLATION




CAUTION
Older brake pads or shoes may contain asbestos, which has been determined to be 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.

1990-91 Deville and Fleetwood


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Fig. Drum brake assembly-1990-91 Deville and Fleetwood



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Fig. Views of the brake assembly-1990-91 Deville and Fleetwood



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Fig. Adjusting screw assembly-1990-91 Deville and Fleetwood

  1. Raise and safely support the vehicle.
  2.  
  3. Remove the wheel and tire assembly.
  4.  
  5. Remove the brake drum.
  6.  
  7. Remove the actuator spring, using suitable pliers.
  8.  
  9. Remove the upper return spring, using brake tool J-8057 or equivalent.
  10.  
  11. Remove the spring connecting link, adjuster actuator and spring washer.
  12.  
  13. Remove the brake shoe hold-down springs and pins using a suitable brake tool or pliers.
  14.  
  15. Disconnect the parking brake cable and remove the brake shoes.
  16.  
  17. Remove the adjusting screw assembly and lower return spring.
  18.  
  19. Remove the retaining ring, pin, spring washer and parking brake lever from the brake shoe.
  20.  
  21. Inspect all parts for wear, over-stress and discoloration from heat and replace as necessary. Inspect the wheel cylinder for leakage and the wheel cylinder dust boots for cuts or tears; replace the entire wheel cylinder if any damage is found.
  22.  
  23. Disassemble the adjuster screw assembly and clean the threads with a wire brush. Wash all components in clean denatured alcohol and allow to dry. Apply suitable brake lubricant to the adjuster screw threads, inside diameter of the socket and the socket face. Inspect the adjuster screw threads for smooth rotation over the full length.
  24.  

To install:

  1. Install the parking brake lever on the brake shoe with the spring washer (concave side against the lever), pin and retaining ring.
  2.  
  3. Install the adjuster pin in the other brake shoe so that the pin projects 0.275-0.283 in. (7.0-7.2mm) from the side of the shoe web where the adjuster actuator is installed.
  4.  
  5. Assemble the adjuster screw assembly, making sure the spring clip is installed in the same position from where it was removed.
  6.  
  7. Install the lower return spring between the brake shoes.
  8.  


WARNING
Do not over-stretch the lower return spring; it will be damaged if the extended length is greater than 3.88 in. (98.6mm).

  1. Connect the parking brake cable and install the brake shoes with the hold pins and springs. The lower return spring should be positioned under the anchor plate.
  2.  


NOTE
The adjuster brake shoe is the one in which the adjuster pin was installed in the shoe web. The adjuster brake shoe is to the front of the vehicle on the left-hand brake assembly and to the rear of the vehicle on the right-hand brake assembly.

  1. Install the adjuster screw assembly between the brake shoes on the backing plate. Make sure the adjuster screw engages the notch in the adjuster shoe and the spring clip points towards the backing plate.
  2.  
  3. Install the spring washer with the concave side against the web of the adjuster brake shoe.
  4.  
  5. Install the adjuster actuator so its top leg engages the notch in the adjuster screw.
  6.  
  7. Install the spring connecting link and hold in place.
  8.  
  9. Insert the angled hook end of the upper return spring through the parking brake lever and brake shoe. Grasp the long, straight section of the spring using brake tool J-8057 or equivalent, pull the spring straight across, then down to hook into the crook on the spring connecting link.
  10.  


WARNING
Do not over-stretch the upper return spring. The spring will be damaged if extended greater than 5.49 in. (139.5mm).

  1. Install the actuator spring, using suitable pliers.
  2.  


WARNING
Do not over-stretch the actuator spring. The spring will be damaged if extended greater than 3.27 in. (83mm).

  1. Make sure the parking brake lever is on its stop and the brake shoes are properly centered on the wheel cylinder pistons.
  2.  
  3. Adjust the brakes and install the brake drum.
  4.  
  5. Install the wheel and tire assembly and lower the vehicle. Check the parking brake adjustment.
  6.  

1992-93 Deville and Fleetwood
  1. Raise and safely support the vehicle.
  2.  
  3. Remove the wheel and tire assembly.
  4.  
  5. Remove the brake drum.
  6.  
  7. Remove the loop end of the actuator spring from the adjuster actuator, then disconnect the other end of the spring from the parking brake shoe web.
  8.  
  9. Pry the end of the retractor spring from the hole in the adjuster brake shoe web.
  10.  


CAUTION
Keep your fingers away from the retractor spring to prevent them from being pinched between the spring and shoe web or spring and backing plate.


WARNING
When removing the retractor spring from either brake shoe, do not overstretch it. Overstretching reduces the spring's effectiveness.

  1. Pry the end of the retractor spring toward the axle until the spring snaps down off the shoe web onto the backing plate.
  2.  
  3. Remove the adjuster brake shoe, adjuster actuator and adjusting screw assembly.
  4.  
  5. Remove the parking brake lever from the parking brake shoe. Do not remove the parking brake cable from the lever unless the lever is to be replaced.
  6.  
  7. Pry the end of the retractor spring from the hole in the parking brake shoe web.
  8.  


CAUTION
Keep your fingers away from the retractor spring to prevent them from being pinched between the spring and shoe web or spring and backing plate.

  1. Pry the end of the retractor spring toward the axle until the spring snaps down off the shoe web onto the backing plate.
  2.  
  3. Remove the parking brake shoe.
  4.  
  5. Remove the retractor spring from the backing plate. If only the brake shoes are being replaced, the retractor spring does not have to be removed.
  6.  
  7. Clean all parts in clean denatured alcohol.
  8.  
  9. Inspect all parts for wear, over-stress and discoloration from heat and replace as necessary. Inspect the wheel cylinder for leakage and wheel cylinder dust boots for cuts or tears; replace the entire wheel cylinder if any damage is found.
  10.  
  11. Disassemble the adjuster screw assembly and clean the threads with a wire brush. Wash all components in clean denatured alcohol and allow to dry. Apply suitable brake lubricant to the adjuster screw threads, inside diameter of the socket and the socket face. Inspect the adjuster screw threads for smooth rotation over the full length.
  12.  

To install:

  1. Lubricate the 6 raised brake shoe pads on the backing plate and the anchor surfaces on the backing plate that contact the lower ends of the brake shoes with suitable brake lubricant.
  2.  
  3. If the retractor spring was removed, reinstall it, hooking the center spring section under the tab on the anchor.
  4.  
  5. Position the parking brake shoe on the backing plate. Using a suitable brake tool, pull the end of the retractor spring up to rest on the web of the brake shoe. Pull the end of the spring over until it snaps into the slot in the brake shoe.
  6.  
  7. Install the parking brake lever to the parking brake shoe. Connect the parking brake cable to the lever, if disconnected.
  8.  
  9. Assemble the adjusting screw assembly.
  10.  
  11. Engage the pivot nut of the adjusting screw assembly with the web of the parking brake shoe and the parking brake lever. Position the adjuster brake shoe so that the shoe web engages the deep slot in the adjuster socket.
  12.  
  13. Using a suitable brake tool, pull the end of the retractor spring up to rest on the web of the adjuster brake shoe. Pull the end of the spring over until it snaps into the slot in the brake shoe.
  14.  
  15. Lubricate the tab and pivot point on the adjuster actuator with suitable brake lubricant. Using a suitable tool, spread the brake shoes while working the adjuster actuator into position.
  16.  
  17. Engage the U-shaped end of the actuator spring in the hole in the web of the parking brake shoe. Using a suitable tool, stretch the spring and engage the loop end over the tab on the adjuster actuator.
  18.  
  19. Check the following to make sure the adjuster actuator is positioned and functioning properly:
    1. Adjuster actuator pivot in shoe web slot.
    2.  
    3. Notch in adjuster actuator is on step in adjusting screw notch.
    4.  
    5. Arm of adjuster actuator is resting freely on star wheel teeth of adjuster screw, not trapped under teeth in a downward angle.
    6.  
    7. Position a suitable brake tool between the upper ends of the brake shoes. Spread the shoes and watch for proper operation of the star wheel.
    8.  

  20.  
  21. Adjust the brakes and install the brake drum.
  22.  
  23. Install the wheel and tire assembly and lower the vehicle. Check the parking brake adjustment.
  24.  



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Fig. Removing the actuator spring from the adjuster actuator-1992-93 Deville and Fleetwood



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Fig. Removing the actuator spring from the brake shoe web-1992-93 Deville and Fleetwood



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Fig. Prying the end of the retractor spring from the hole in the adjuster brake shoe web-1992-93 Deville and Fleetwood



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Fig. Removing the adjuster brake shoe and adjuster actuator-1992-93 Deville and Fleetwood



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Fig. Removing the adjusting screw assembly-1992-93 Deville and Fleetwood



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Fig. Prying the end of the retractor spring from the hole in the parking brake shoe web-1992-93 Deville and Fleetwood



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Fig. Removing the retractor spring-1992-93 Deville and Fleetwood



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Fig. Drum brake assembly-1992-93 Deville and Fleetwood



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Fig. Brake component views-1992-93 Deville and Fleetwood



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Fig. Adjusting screw assembly components-1992-93 Deville and Fleetwood



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Fig. Lubricate the 6 raised brake shoe pads on the backing plate with suitable brake lubricant

ADJUSTMENTS



  1. Raise and safely support the vehicle.
  2.  
  3. Remove the rear wheel and tire assemblies.
  4.  
  5. Remove the brake drums.
  6.  
  7. Make sure the stops on the parking brake levers are against the edge of the shoe web. If the parking brake cable is holding the stops off of the edge of the shoe web, loosen the parking brake cable adjustment.
  8.  
  9. Measure the inside diameter of the brake drum using tool J-21177-A or equivalent.
  10.  
  11. Turn the adjuster nut until the brake shoe diameter is 0.050 in. (1.27mm) less than the inside drum diameter for each rear wheel.
  12.  
  13. Install the brake drums and the wheel and tire assemblies.
  14.  
  15. Lower the vehicle.
  16.  
  17. Apply and release the brake pedal 30-35 times using normal pedal force, pausing about one second between applications.
  18.  



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Fig. Drum brake adjusting screw assembly-1990-91 Deville and Fleetwood



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Fig. Measuring brake drum and shoe for adjustment

 
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