7-31
E
BRKT
PTT MOTOR
SERVICE POINTS
Motor inspection
1. Inspect:
● Commutator
Dirt → Clean with 600 grit sandpaper.
2. Inspect:
● Segment undercut
Obstruction → Clean.
NOTE:
Remove all metal particles with com-
pressed air.
3. Measure:
● Commutator diameter a
Out of specification → Replace.
Commutator diameter limit:
15.5 mm (0.61 in)
4. Measure:
● Armature coil continuity
Out of specification → Replace.
Armature coil continuity
Commutator segments Continuity
Segment - laminations No continuity
Segment - shaft No continuity
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