How to Replace the Motor Brushes on a DeWALT Polisher

Your polisher's motor uses two carbon brushes to conduct electricity to the armature. The brushes do this through the armature's commutator. The carbon brush will wear down over time (from rubbing against the rotating commutator) and will need to be replaced. Worn brushes can cause excessive sparks around the commutator. The sparks can also be caused by a damaged armature, so you'll want to carefully inspect both components if sparks are present.

Let's get started.

REMOVING THE MOTOR BRUSHES   1. Remove the motor brushes.

a. Use a screwdriver to remove the brush caps.

b. Remove the motor brushes from the brush holders.

INSTALLING THE NEW MOTOR BRUSHES

  2. Install the motor brushes.

a. Install the new motor brushes into the brush holders.

b. Secure the motor brushes with the brush caps.