Polish the brake drum with a fine emery cloth. Do not refinish the brake drum if the brake linings are slightly worn and grooved. Eliminating all grooves in the brake drum and smoothing the ridges on the brake lining would require removing too much metal and brake lining. If left alone the grooves and the ridges match and satisfactory service can be obtained.

Always replace a grooved brake drum if you are replacing the brake linings. Using a grooved brake drum with new brake linings will wear the brake linings and make proper brake performance difficult to obtain.

Reboring the brake face diameter is not recommended. There is no way of knowing the number of heat cycles or severity of the cycles to which a brake drum has been subjected in actual usage.

Do not refinish the braking surface when installing new brake drums. These parts are already at the correct level of surface finish.