3-34 IGNITION AND ELECTRICAL
• Check for continuity between the commutator and the arma-
ture core/shaft.
Replace armature if continuity is indicated.
09930-99320: Digital tester
Tester range: (Continuity)
• Check for continuity between adjacent commutator segments.
Replace armature if no continuity is indicated.
09930-99320: Digital tester
Tester range: (Continuity)
BRUSHES
Check the length of each brush.
09900-20101: Vernier calipers
Brush length:
Standard: 15.5 mm (0.61 in)
Service limit: 9.5 mm (0.37 in)
If brushes are worn down to the service limit, they must be
replaced.
BRUSH HOLDER
• Check brush holder continuity.
09930-99320: Digital tester
Tester range: (Continuity)
Brush holder continuity:
Replace brush holder if the tester doesn’t show the above.
Wear safety glasses when using compressed air.
Commutator
Shaft
Armature
core
Brush
Tester probe connection Continuity
Brush holder positive + to Brush
holder negative -
No
Brush holder positive + to Base
plate (ground)
No
Base plate
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