Ford Crown Victoria/Grand Marquis 1989-1998

Brake Drums



See Figure 1

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Fig. Fig. 1: Lift the brake drum from the shoes and backing plate

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.

  1. Raise and safely support the vehicle securely on jackstands.
  3. Remove the tire and wheel assembly.
  5. Remove the three retaining clips (if equipped), then remove the brake drum.

It may be necessary to back off the brake shoe adjustment in order to remove the brake drum. This is because the drum might be grooved or worn from being in service for an extended period of time.

Before installing a new brake drum, be sure to remove any protective coating with brake cleaner or a suitable fast-drying degreaser.

  1. Install the brake drum in the reverse order of removal, then adjust the brakes as outlined later in this section.


See Figures 2 and 3

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Fig. Fig. 2: Measure the drum using a micrometer made especially for brake drums

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Fig. Fig. 3: Brake drum maximum diameter location

Check that there are no cracks or chips in the braking surface. Excessive bluing indicates overheating and a replacement drum is needed. The drum can be machined to remove minor damage and to establish a rounded braking surface on a warped drum. Never exceed the maximum oversize of the drum when machining the braking surface.

The brake drum inside diameter and run-out can be measured using a brake drum micrometer. The drum should be measured every time a brake inspection is performed. Take the inside diameter readings at points 90° apart from each other on the drum to measure the run-out. The maximum inside diameter is stamped on the rim of the drum or on the inside above the lug nut stud holes and is also contained in the brake specifications chart at the end of this section.