Article: Over time, brake drums can accumulate a good amount of grime and debris simply from their normal use. Once you have the brake drum off, take the opportunity to clean it of this debris if needed. Sources differ on which types of cleaning solutions you should use. Some recommend only specially-formulated brake cleaner, while others say that you can usually get away with soap and water. Over time, the shoes which press against the inside of the drum can become worn (much like brake pads do for disc brakes). Check your manufacturer's specifications — if your brake shoes are thinner than recommended, take the opportunity to replace them. Use a pair of pliers to pull back the shoes' return springs. Next, use a brake spring tool to remove the hold-down pins and springs. At this point, some brake shoes will be able to be removed. If not, you may need to use a screwdriver to disconnect the brake cable. Most drum brakes on cars and other common vehicles are hydraulically powered. If there is a leak in the hydraulic system, you may notice fluid inside the drum and on the brake shoes. Usually, this is accompanied by decreased brake performance. If necessary, replace the leaky wheel cylinder. Loosen the brake line connected to it, then loosen the bolts at the rear of the cylinder. Insert the new cylinder into its proper place, attach the brake fitting, then the brake line, then finally re-screw the bolts. As a common rule of thumb, if the car pulls to one side while braking and the brake caliper appears undamaged, you may have a leak in your brake line.  To replace damaged brake lines,you'll first need to loosen and remove the old brake line at its fittings with a flare nut or wrench cap. Be sure to cap the line to prevent spilling any fluid if necessary. Then, cut a new length of brake line and mate it to the old line with brass connectors or simply install it directly into the old line's fittings. As with other forms of brake maintenance, it's important to replace any lost fluid and bleed the brakes after completing your maintenance. Since you have easy access to the inner parts of the wheel, you may want to take the opportunity to clean and repack the bearings. To begin, disassemble and remove the vehicle's hub assembly. Remove the bearing assembly's races (this usually means breaking them) before finally removing the bearings themselves. Clean the bearings by putting them in a container with gasoline and shaking, then rinsing with water.  Add plenty of fresh grease to the bearing by hand or with a bearing packing tool. When you're done with your maintenance, carefully reassemble the wheel and replace the brake drum by performing the disassembly steps in reverse order. If you replaced the wheel cylinder, make sure it's secured properly. Hold the brake shoes to the backing plate and re-attach the springs (pliers or vice grips are usually a must here). Before replacing the adjuster, clean its threads with an anti-seize compound. Finally, replace the drum. Lift the tire back onto its mounts. Screw the lug nuts on most of the way, but don't attempt to tighten them all the way. Lower the vehicle back to the ground. Finish tightening the lug nuts until they are firmly secured. To evenly distribute the stress across the wheel, tighten the nuts in a star-shaped sequence.

What is a summary?
Clean the drum. Replace the shoes. Check the wheel cylinder for hydraulic leaks. Inspect the brake lines for damage. Consider repacking the wheel bearings. Replace the brake drum when finished. Replace the wheel to finish.