TM 9-2920-243-34
(4) Inspect armature shaft alinement and
commutator for eccentricity to shaft with a lathe
or V-blocks and a dial indicator (fig. 3-28). Check
armature shaft for true alinement. If shaft runout
exceeds 0.005-inch, commutator of armature
shaft must be resurfaced provided it will not be
cut below limits specified in repair and rebuild
standards (para 3-31 a). If commutator requires
cutting below limits specified, replace starter.
Figure 3-27. Testing armature for short circuits.
Figure 3-26. Testing armature for grounds.
3-11
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