Model t10446 heavy-duty hammer drill -11-
carbon brush replacement
the motor carbon brushes will wear with
use. if th e motor becomes excessive -
ly no isy, l oses power, or stops running,
inspect the brushes. if th e brushes are
shorter than 1⁄4", replace them as a set.
items needed Qty
standard screwdriver #1 ..........................1
Carbon Brushes* ......................................2
*grizzly part number pt10446051
to replace the carbon brush es:
1. disConneCt tooL FroM poWer!
2. Clean away any dust and debris from
the motor housing. this will prevent
material falling into the carbon brush
installation holes (see figure 10),
which could result in motor damage.
3. Unscrew the carbon brush caps from
both sides of the motor, then remove
the carbon brushes.
note: If the current brushes do not
need replacement after inspection, re-
install them so that the curved surface
worn on the end of the brushes match
the curve of the stator. This will pre-
vent unnecessary wear from repeated
break-in.
4. insert the new carbon brushes into the
installation holes so that the end of the
brush contacts the stator, then replace
the caps.
there may be an i ncrease in sparks
from the motor after new car bon
brushes are installed. this is nor-
mal as the ends of the brushes
break-in.
figure 10. Carbon brush components.
installation
hole
Carbon
Brush
Cap