Specifications

4) Check for Surface Distortion on the Armature
and the Commutator
Use a dial gauge to measure the distortion of the
outside surfaces
of the armature core and the
commutator. If it is above the limit, then repair
or replace it.
(mm)
5) Check the Surface of the Commutator
If the commutator surface
is rough, polish
with fine sandpaper
(# 500 - 600).
Core
I
Fig. 52
6) Check the Depth of the Insulating Material from
the Commutator Surface
If the depth of the insulating material from the
commutator segments
is less than the limit, re-
pair it
by filing it down.
(mm)
Standard (New)
Limit (Used)
0.5 - 0.8
0.2 (Min.)
it
Fig. 53
Insulator
0.5 - 0.8 mm
Commutator
Segments
Correct
Incorrect
Fig. 54
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