The brake shoe return and the hold-down springs must be replaced whenever they are replaced. Due to the fact that these springs continually go through a process of heating and cooling, they loose their force with time which may result into the shoes rubbing against the drum and wearing out more rapidly than normal. Begin by loosening the wheel lug nuts and raising the rear of the vehicle on jackstands before replacing the brake shoes. Then, remove the wheels and release the parking brake. This involves either backing off the adjuster wheel or retracting shoes to remove brake drums. Before disassembling, clean this type of brake assembly with brake system cleaner. To replace these parts, follow illustrations provided being keen to work on one assembly at a time. Check for any cracks on it, score marks, deep scratches or hard spots before you re-install the drum; if necessary take it to an automotive machine shop for resurfacing. Make a preliminary adjustment by turning the adjuster star wheel until there is only slight drag between brakes and drum then back off slightly when installing new ones mount wheel lower vehicle tighten lug nuts install brakes leading forward reverse stops operating parking bring about satisfactory pedal action finally make sure that you carefully check how well brakes function in a car after finishing up everything.