4
Brush wear rate varies, depending
on the individual application’s duty
cycle, and should be inspected at
frequent intervals to determine an
appropriate inspection schedule.
Brushes should be replaced before
the total length is less than
.375 inch
(9.5 mm)
. See Figure 8.
Repeat the inspection procedure for
the other brush.
If new brushes are required, record
the motor type and serial number
from the motor nameplate. Contact
your supplier, any Authorized
Bodine Distributor, or our Service
Department. You will find more
information on how to contact us on
Bodine Electric’s website at:
www.bodine-electric.com
STEP #5 – Remove Old Brushes
Using a medium size slotted screwdriver, loosen the screw that holds the brush
wire by four turns (do not remove). Slide the brush wire terminal out from
under the holding screw head and remove the brush.
Repeat this procedure for the other brush.
STEP #6 – Clean Out Brush Dust
Excessive carbon dust will accumulate inside the motor endshield over time and
should be removed periodically to allow normal operation. Partial disassembly
and cleaning is best. However, carefully applying compressed air alternately
through each of the open brush cap holes may provide adequate cleaning. Do
not use solvents as they may damage non-metallic parts and adversely affect
subsequent brush commutation.
STEP #7 – Install New Brushes
Position the terminal of the new brush fully under the screw head on the brush
box and tighten the screw (Figure 9). Next, observe that there is a slot in the
base of each brush box. Position and insert each brush so that the wire attached
to the brush aligns with the slot in the brush box and can “feed” into the brush
box slot as the brush wears down. The brush wire must be capable of moving
freely in the slot. See Figure 10.
Figure 8 – Measure brush.
> .375” (9.5 mm)
