Removing brake drums is really easy. Raise the tire platform by putting and stands with it. Unscrew the lug nuts from the tire. Remove the tire, and you will see the brake drums. Sometimes, the brake drums are attached by bolts as well. if you see bolts connecting the drums, unscrew that and disconnect the drum from the surface. Push it without harming the brake shoes. now you can attach the new brake drums. Before doing that, please make sure that the new brake drums are same shape and size of the old one andthey are specified under your car brand and model.