Chrysler Colt/Vista 1990-1993 Repair Information

Disc Brake Pads

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CAUTION
Brake pads and shoes contain asbestos, which has been determined to be a cancer causing agent. Never clean the brake surfaces with compressed air! Avoid inhaling any dust from brake surfaces! When cleaning brakes, use commercially available brake cleaning fluids.

INSPECTION



The brake pad thickness can usually be checked (on most models) by removing the front (or rear, models equipped) wheel, and looking a cutout at the top of the brake caliper. Replace the pads if uneven wear (inner and outer pads) is determined. Always replace the brake pads as a set (both wheels).

REMOVAL & INSTALLATION



Colt

See Figures 1, 2, 3 and 4



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Fig. Fig. 1: Front disc brake - AD54 type - 1990 Colt hatchback and sedan



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Fig. Fig. 2: Front disc brake - PFS15 type - 1990 Colt hatchback and sedan



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Fig. Fig. 3: Front disc brake - AD54 type - 1990 Colt Wagon

  1. Raise and support the front end on jackstands. Remove the wheels.
  2.  

On models equipped with the PFS15 type front disc brakes; the caliper and pads are retained to the adapter by two sleeve pin bolts. Remove the pin bolts and service the assembly as required. Sleeve pin torque is 16-23 ft. lbs.



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Fig. Fig. 4: Front disc brake - M-R34V type - 1991-92 U.SA. Colt hatchback and sedan

  1. Remove the lower sleeve bolt from the caliper and rotate the caliper upward.
  2.  

There is a grease coating on the bolt. Make sure that it is not removed or contaminated.

  1. Support the caliper by suspending it with wire or string from a nearby suspension member.
  2.  
  3. Remove the inner, then outer shims from the caliper.
  4.  
  5. Lift out the brake pads.
  6.  
  7. Remove the pad liners.
  8.  
  9. Clean all parts in solvent made for brake parts.
  10.  
  11. Inspect the dust boot on the caliper piston. If it is torn or brittle, replace it. and consider rebuilding the caliper.
  12.  
  13. Inspect the shims and liners and replace them if damaged.
  14.  
  15. Remove the cap from the master cylinder reservoir and siphon off about 1 / 4 inch of fluid.
  16.  
  17. Using a C-clamp, force the piston back into the caliper as far as it will go. Remove the clamp.
  18.  
  19. Install the liners, pads and inner, then outer shims.
  20.  

Never replace just one set of pads, pads should be replaced on both front wheels at the same time.

  1. Lower the caliper and install the lower sleeve bolt. Torque the bolt to 16-23 ft. lbs.
  2.  
  3. Start the engine and depress the brake pedal several times. Hold it depressed for about 5 seconds. Turn the engine off.
  4.  
  5. Rotate the brake rotor a few times. Using a spring scale hooked to one of the lugs, measure the brake drag. Remove the pads and perform the spring scale test again. The difference between the drag test with and without the pads should not exceed 15 lbs. If the difference does exceed 15 lbs., the caliper will have to be rebuilt or replaced. Service if required. When servicing is complete, pump the brakes several times. Do not move the car until a firm brake pedal is present.
  6.  

Vista

See Figures 5 and 6



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Fig. Fig. 5: Front disc brake assembly - 1990-91 Vista



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Fig. Fig. 6: Front disc brake assembly - 1992-93 Vista

  1. Raise and support the front end on jackstands. Remove the front wheels.
  2.  

On late models equipped with the PFS15 type front disc brakes; the caliper and pads are retained to the adapter by two sleeve pin bolts. Remove the pin bolts and service the assembly as required. Sleeve bolt torque is 16-23 ft. lbs.

  1. Remove the lower pin bolt and rotate the caliper upwards. Support the caliper with wire or string from a nearby suspension member.
  2.  
  3. Remove the inner shim, the anti-squeal shim and the pads from the caliper support assembly.
  4.  
  5. Remove the clips from the pads.
  6.  
  7. Clean all parts in solvent made for brake parts.
  8.  
  9. Inspect the dust boot on the caliper piston. If it is torn or brittle, replace it, and consider rebuilding the caliper.
  10.  
  11. Inspect the shims and liners and replace them if damaged.
  12.  
  13. Remove the cap from the master cylinder reservoir and siphon off about 1 / 4 inch of fluid.
  14.  
  15. Using tool MB990520, force the piston back into the caliper as far as it will go. Remove the clamp.
  16.  
  17. Install the pads with clips attached and the proper shims, in position, on the support.
  18.  

Never replace just one set of pads. Pads should be replaced on both front wheels at the same time.

  1. Lower the caliper and install the lower pin bolt. Torque the bolt to 16-23 ft. lbs.
  2.  
  3. Start the engine and depress the brake pedal. Hold it depressed for about 5 seconds. Turn the engine off.
  4.  
  5. Rotate the brake rotor a few times. Using a spring scale hooked to one of the lugs, measure the brake drag. Remove the pads and perform the spring scale test again. The difference between the drag test with and without the pads should not exceed 15 lbs. If the difference does exceed 15 lbs., the caliper will have to be rebuilt or replaced.
  6.  
  7. When servicing is complete, pump the brakes several times, do not operate the vehicle until a firm brake pedal is present. Bleed the brakes if necessary.
  8.  

 
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