If your washing machine stops running, interrupts or doesn't run smoothly, it might be because of worn down carbon brushes. The carbon brushes conduct electricity from the fixed to the moving parts of your machine. When they are worn down, the motion of e.g. the spinning might be enough to disrupt the electric flow. In this tutorial I will open up a Siemens Siwamat 6123 step by step to replace them, but it can still serve as a rough guide to changing the carbon brushes on other machines.