REMOVAL & INSTALLATION
See Figures 1 through 25
- Remove the hub cap (if used) and loosen the lug nuts. Release the parking brake.
- Block the front wheels, raise the rear of the truck, and support it with jackstands.
Support the truck securely.
- Remove the wheels.
- Unfasten the brake drum retaining screws.
- Tap the drum lightly with a mallet in order to free it. If the drum cannot be removed easily, insert a screwdriver into the hole in the backing plate and hold the automatic adjusting lever away from the adjusting bolt. Using another screwdriver, relieve the brake shoe tension by turning the adjusting bolt clockwise. If the drum still will not come off, use a puller; but first make sure that the parking brake is released. On models with dual rear wheels, the drum is removed along with the rear axle shaft.
Do not depress the brake pedal once the brake drum has been removed.
- Inspect the brake drum as detailed in the following section.
- To install the drum, simply replace the drum on the axle and tighten the retaining screw.
Don't forget to adjust the brake shoes.
Do not step on the brake pedal with the drum removed.
- Install the wheels and lower the truck. Bleed the brakes and road test the vehicle.
- Clean the drum.
- Inspect the drum for scoring, cracks, grooves and out-of-roundness. Replace the drum or have it "turned" at a machine or brake specialist shop, as required.
- Light scoring may be removed by dressing the drum with fine emery cloth.
- Heavy scoring will require the use of a brake drum lathe to turn the drum.