Some common mechanical shaver repairs include cleaning the components of the shaver after use and replacing the blades on the shaver. Other repairs include lubricating the shaver's heads and replacing the screen over the blades.
To identify which repair needs to be made on a shaver, first identify the specific problem. For example, if the shaver is sluggish or does not provide a close shave, clean and lubricate the head. If the problem persists, the blades may need to be replaced. If the shaver feels rough against the skin, the problem is likely corrosion or damage on the screen that covers the heads.