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5.
Check for continuity between the segments of the
commutator. If an open circuit exists between any
segments, replace the armature.
6.
Place the armature on an armature tester. Hold a
hacksaw blade on the armature core.
ARMATURE TESTER
ARMATURE
If the blade is attracted to the core or vibrates while
the core is turned, the armature is shorted. Replace
the armature.
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COMMUTATOR
SEGMENT
HACKSAW BLADE
7.
With an ohmmeter, check that no continuity exists
between the commutator and armature coil core,
and between the commutator and armature shaft.
If continuity exists, replace the armature.
SHAFT
COIL CORE
COMMUTATOR
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