Raise the vehicle and remove the wheel, then take off the
Brake Drum. Clean around the hydraulic connection to the wheel cylinder and disconnect the line, plugging the end to prevent fluid loss and dirt contamination. Remove the brake shoe pull back springs, followed by the cylinder-to-flange plate securing screws, disengaging the links from the brake shoes to remove the cylinder. For models from 1978 and later, insert two sharp awls or pins into the access slots at the rear of the backing plate and bend the retainer tabs away to release the wheel cylinder. Using pliers, remove and discard the boots from the cylinder, then remove and discard the piston cups. Inspect the cylinder bore and pistons for corrosion and pitting, discarding if pitted, while polishing stained surfaces with crocus cloth around the circumference. Ensure hands are clean, dry, and free from contaminants, then clean the metal parts in new brake fluid or denatured alcohol and shake off surplus fluid for ease of handling. Lubricate the cylinder with clean brake fluid and insert the spring expander assembly, followed by new cups that must be clean, dry, and not lubricated, ensuring the flat surface is forward to enter the ends of the cylinder. Install the pistons with the flat surface uppermost without lubrication, then press new boots into the cylinder counter bores without lubrication. When installing the wheel cylinder, position it on the brake flange plate and install screws loosely; for models from 1978-1980, use a block of wood between the cylinder and axle flange to hold it against the backing plate, then press a new retaining clip into position. Install the links and pull back springs, connect the hydraulic line to the cylinder while moving it as necessary to prevent stripping the threads, and tighten the cylinder mounting screws for models from 1974-1977. Finally, install the brake drum and wheel, bleed the braking system, and lower the vehicle to the ground.