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d)
Check for Surface Distortion on the Arma-
ture
and
the Commutator.
Use a
dial
gauge to measure the distortion
of the out
side
surfaces of the armature
core
and
the commutator.
If
it is above the
limit, then repair or replace
it.
Unit
:
mm
I
I
Standard (New)
1
Limit
(Used)
1
I
Armature
I
0.05
(Max.)
[
0.1-
(Max7
Commutator
I
0.05
(Max.)
1
OK
(Max.)
1
Q
0
COMMUTATOR
I
Fig.
89
e) Check the Surface of the Commutator.
If
the commutator surface
is
rough, then
please
use
No,
500-600
sandpaper to make
it smooth.
Fig.
90
f>
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, then please repair it
by
filing it
down.
Unit
:
mm
Standard (New)
Limit
(Used)
0.5-0.8
0.2
(Min.)
A
INSULATOR
?n+
0.5-0.8
mrn
COMMUTATOR
SEGMENTS
CORRECT
1R-T
INCORRECT
Fig.
91
-
57
-