ELECTRICAL SYSTEM
12-32
2.8.7 Checking armature coil
(1) Inspect the armature coil using a growler.
Hold a piece of iron plate against the armature core. If
the iron plate vibrates, replace the armature with a new
one.
Checking armature coil for short circuit
(2) Check that there is no continuity between the
commutator and the shaft (core).
If any continuity is observed, replace the armature with
a new one.
Checking armature coil for grounding
(3) Check that there is continuity between segments in
various combinations.
If poor or no continuity is observed, replace the
armature with a new one.
Testing breaks of armature coil
Growler
tester
Iron plate
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