One of my DeWalt cordless drills, one that is by my side so much I
should call it "Shop Dog", has begun making a strange ozone smell and
has visible sparking from the motor armature.

ServiceNet shows motor brushes as available for the drill. They are
not easily removed, so I haven't looked at them yet. I've never had
to replace brushes in a power tool, so I'm not familiar with the
symptoms bad brushes might display.

Before I tear down a working drill and order $20 worth of parts, does
it sound like I need to replace the brushes?

Thanks!

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