Makita G12010R Instructions For Use Manual page 40

CHECKING CARBON BRUSH
If the brush become excessively worn, its
contact pressure with the slip ring
changes and causes a roughened surface
on the slip ring, resulting in irregular
generator performance.
Check the brush every 500 hours or if
generator performance is irregular.
If the brush is 0.2 in.(5 mm) long or less,
replace it with a new one.
(a) Remove the brush cover.
(b) Disconnect the wire connector and
remove the brush.
(c) Carefully note the brush direction and
relative position with the slip ring when
installing new brush.
BRUSH
HOLDER
15 to 5 mm
(0.6" to 0.2")
FLANGE
BOLT
BRUSH
COVER
29
BRUSH
BRUSH
HOLDER
SCREW