SECTION 55 - ELECTRICAL SYSTEM
55-150
INSPECTION AND REPAIR
Inspect the following components, using
conventional test methods, and repair or replace as
necessary.
Armature
Inspect the armature for internal short circuits with a
growler.
Replace the armature if a short circuit is indicated.
SM463-205
216
Inspect the armature for a short to ground using a
continuity tester.
Replace the armature if there is any continuity
between the commutator, 1, and armature shaft, 2, or
core, 3.
1
2
3
SM463-206
217
Check the armature for runout with a dial indicator
and V-blocks. If the commutator is rough, or more
than 0.05 mm (0.002″) out of round, turn it down or
replace it. Undercut the separators between the
segments if the depth is less than 0.2 mm (0.01″).
The distance, 1, from the commutator segment and
insulation should be between 0.5 mm and 0.8 mm
(0.02″ and 0.03″).
SM463-207
0.5 to
0.8mm
218
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