REMOVAL & INSTALLATION
See Figures 1, 2, 3, 4 and 5
- With the tires on the ground, break loose the lug nuts.
- Make sure the parking brake is not on, then raise and safely support the rear of the vehicles with jackstands.
- Remove the wheel cover/and or nuts covers, as applicable.
- Remove the tire and wheel assembly. If equipped, use a pair of pliers to remove the Tinnerman nuts from the wheel studs.
- Pull the brake drum of the axle shaft.
If the drum will not come off, get under the car (make sure you have safety stands under the car to support it) and perform the following
- Remove the rubber plug from the brake backing plate. Shine a flashlight into the slot in the plate. You will see the top of the adjusting screw star wheel and the adjusting lever for the automatic brake adjusting mechanism.
- To back off on the adjusting screw, you must first insert a small, thin screwdriver or a piece of firm wire (coat hanger wire) into the adjusting slot and push the adjusting lever away from the adjusting screw.
- Then, insert a brake adjusting spoon into the slot and engage the top of the star wheel. Lift up on the bottom of the adjusting spoon to force the adjusting screw star wheel downward.
Repeat this operation until the brake drum is free of the brake shoes and can be pulled off.
- If installing a new brake drum, remove the protective coating totally and lightly sand the inner brake drum surface.
- If the brake adjustment was changed to remove the drum, adjust the brakes until the drum will just fit over the brakes. After the wheel is installed it will be necessary to complete the adjustment. See the Brake Adjustment procedure located earlier in this section.
- Install the brake drum and secure with the retainer nuts, if equipped.
- Install the tire and wheel assembly. Hand-tighten the lug nuts.
- Carefully lower the vehicle, them tighten the lug nuts to 85-105 ft. lbs. (115-142 Nm).
- Clean the brake drums and remove any grease, brake fluid or other contaminants from the drum using denatured alcohol, or a suitable cleaner.
- Inspect and measure the brake drum with Rotunda Brake Drum Micrometer 104-00046 or equivalent.
- Measure the drums with a brake drum micrometer regardless of inspection. The brake drum micrometer is set to the drum diameter and measures the amount and type of ward. Measure the diameter at various point of 45 degrees around the circumference and at the bottom of the deepest groove to determine if the brake drum required replacement.