How to Replace the Motor Brushes on a Makita Angle Drill
Finish Nailer Repair - Replacing the Driver Guide (Ridgid Part # 79004001022)
Your tool's motor uses two carbon brushes to conduct electricity to the armature. The brushes conduct electricity to the armature through its 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 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 from the motor housing.
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.