GM Cadillac Deville_Fleetwood_ELD_Seville 1990-1998

Brake Pads

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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.



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Fig. Remove the locating pins and . . .



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Fig. . . . remove the caliper from the knuckle



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Fig. Remove the outer pad from the caliper by releasing the clip



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Fig. The caliper piston can be depressed using a special tool, such as this one from Lisle®. If a toll like this is not available, a C-clamp works well also. Make sure you leave the inner pad in while doing this



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Fig. Remove the inner pad from the caliper



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Fig. Use mechanic's wire or a similar device to support the caliper out of the way



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Fig. A coating of Disc Brake Quiet or equivalent silencer should be applied to the back of the new pads


NOTE
Disc brake pads must be replaced in axle sets only.

  1. Use a syringe or similar tool to remove 2 / 3 of the brake fluid from the master cylinder reservoir.
  2.  
  3. Raise and safely support the vehicle.
  4.  
  5. Remove the wheel and tire assembly, then reinstall 2 lug nuts to retain the disc brake rotor.
  6.  
  7. Remove the disc brake caliper from the mounting bracket, but do not disconnect the brake hose from the caliper. Suspend the caliper with wire from the coil spring.
  8.  


WARNING
Do not let the caliper hang from the brake hose. The hose may become damaged, causing possible brake failure.

  1. Use a small prybar to disengage the buttons on the outboard disc brake pad from the holes in the caliper housing. Remove the outboard disc brake pad.
  2.  
  3. Remove the inboard disc brake pad.
  4.  
  5. Inspect the disc brake rotor and machine or replace, as necessary.
  6.  

To install:

  1. Wipe the outside surface of the caliper piston boot clean using denatured alcohol.
  2.  
  3. Using a C-clamp, bottom the caliper piston into the caliper bore. Tighten the clamp slowly, and be careful not to damage the piston or piston boot. After bottoming the piston, use a small plastic or wood tool to lift the inner edge of the boot next to the piston and press out any trapped air; the boot must lay flat.
  4.  
  5. Install the inboard disc brake pad by snapping the retainer spring into the piston. Make sure the pad lays flat against the piston and does not touch the boot. If the pad contacts the boot, remove the pad and reseat or reposition the boot.
  6.  
  7. Install the outboard disc brake pad. Position the pad so that the wear sensor is at the trailing edge of the pad during forward wheel rotation on all except 1990 Deville and Fleetwood. On 1990 Deville and Fleetwood, position the pad so that the wear sensor is at the leading edge of the pad during forward wheel rotation. The back of the pad must lay flat against the caliper.
  8.  
  9. Install the disc brake caliper.
  10.  
  11. Install the wheel and tire assembly and lower the vehicle.
  12.  
  13. Apply the brake pedal several times to position the caliper piston and seat the brake pads in the caliper.
  14.  
  15. Check the brake fluid level in the master cylinder and add fluid as necessary.
  16.  

INSPECTION





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Fig. View of the disc brake pads from a 1992 Deville. Note the wear sensor on the trailing edge of the outboard pad



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Fig. Front disc brake pad inspection



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Fig. Disc brake pad wear sensor

Inspect the disc brake pads every 6000 miles and any time the wheels are removed. Check both ends of the outer pad by looking in at each end of the caliper. These points are where the highest rate of wear normally occurs. Check the inner pad by looking down through the hole in the top of the caliper. When any lining thickness is worn to within 1 / 32 in. (0.76mm) of the backing plate or rivet, the pads must be replaced in axle sets. Some inner pads have a thermal layer against the backing plate, integrally molded with the lining; don't confuse this extra layer with uneven inboard-outboard lining wear.

The outer disc brake pad is also equipped with a wear sensor. When the lining is worn, the sensor contacts the disc brake rotor and produces a warning noise, indicating that disc brake pad replacement is necessary.

 
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