Whenever one replaces brake shoes, it is important to replace the return and hold-down springs because they tend to lose tension over time which may make the shoes to drag on the drum and wear out prematurely. Firstly, loosen wheel lug nuts and raise rear of vehicle securing it with jackstands while blocking front wheels to prevent rolling. After that release the parking brake and remove the wheel. All four rear brake shoes should be replaced at once when working on one brake assembly avoiding part mix-up. Please follow this procedure of replacing a brake shoe, ensuring proper cleaning of the assembly without using compressed air and removing such parts as return spring, hold-down spring among others as directed in Figure 6-29. Then remember to ensure that parking brake is completely released when pulling off the brake drum; if you still cannot pull it off then retract the brake shoes with adjuster star wheel and screwdrivers. Once that is done, check for cracks, score marks, scratches or hard spots on the drum and where necessary resurface or replace if worn beyond resurfacing limits. Next install the brake drum, wheel, lug nuts again lower vehicle down to ground level and tighten lug nuts. Finally adjust brakes by making forward stop reverse stop operations with parking brake until good pedal action is achieved. Before taking your vehicle for a drive make sure you test thoroughly the operation of your brakes.