REMOVAL & INSTALLATION
See Figures 1 and 2
- Loosen the rear wheel lug nuts slightly. Release the parking brake.
- Block the front wheels, raise the rear of the car, and safely support it with jackstands.
- Remove the lug nuts and the wheel.
Tap the drum lightly with a mallet to free the drum if resistance is felt. Sometimes brake drums are stubborn. If the drum is difficult to remove, perform the following:
- Insert the end of a bent wire (a coat hanger will do nicely) through the hole in the brake drum and hold the automatic adjusting lever away from the adjuster.
- Reduce the brake shoe adjustment by turning the adjuster bolt with a brake adjuster tool. The drum should now be loose enough to remove without much effort.
- Clean the drum and inspect it as detailed in this section.
- Hold the brake drum so that the hole on the drum is aligned with the large hole on the axle carrier and install the drum.
- If the adjuster was loosened to remove the drum, turn the adjuster bolt to adjust the length to the shortest possible amount.
- Install the rear wheels, tighten the lug nuts and lower the vehicle.
- Retighten the lug nuts and pump the brake pedal before moving the vehicle.
See Figures 3 and 4
- Remove the inspection hole plug from the backing plate, and with the aide of a flashlight, check the lining thickness. The minimum lining thickness is 0.039 inch (1.0mm). If the lining does not meet the minimum specification, replace the shoes.
- Remove the brake drum and clean it thoroughly.
- Inspect the drum for scoring, cracks, grooves and out-of-roundness. Replace or turn the drum, as required. Light scoring may be removed by dressing the drum with fine grit emery cloth. Heavy scoring will require the use of a brake drum lathe to turn the drum.
- Using inside calipers, measure the inside diameter of the drum. The maximum allowable diameter for 1983-86 vehicles is 7.913 inch (201mm). The maximum allowable diameter for 1987-96 vehicles is 9.079 inch (230.6mm). If the drum exceeds the maximum diameter, replace it.