Component Maintenance Manual
12037 N Highway 99
Seminole, OK 74868
Phone (405) 382-0731
Fax (405) 382-0737
http://www.enviro-ok.com
Copyright © 2017
ATA 21-00-23
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Revision 10
June 1, 2017
9.2.1.3
Ensure that brush lead does
NOT
extend out past the edge of the brush as shown
below. This will cause the brush not to pass through the brush guide properly.
9.2.1.4
The brushes must be formed to the curvature of the commutator prior to full load
operation. To form the brushes, cut a 1.5” X ~ 7.5” strip of 200 grit garnet
sandpaper. Cut 2 pieces of 3M 40PR Utility Tape (or equivalent non residue
leaving), put one piece on each side (rough and smooth) of one end of the
sandpaper, the tape on the rough side must be longer to attach to the commutator.
CAUTION:
Garnet sand paper
MUST
be used for this process.
9.2.1.5
Feed the sandpaper through the opening near the brush guide and tape the paper
to the commutator with the rough side facing out. Rotate the motor shaft to “wind”
the sandpaper around the commutator in the normal direction of motor rotation,
CCW as viewed from brush end of motor (the sandpaper should overlap enough to
cover the tape).