KiSC issued 09, 2007 A
0
Grounding of Armature Coil
1 )
Check conduction across the com mutator and the
a rmatu re shaft.
2)
I
f cond ucti n g, repl ace.
0
Checking Armature Flexure
1)
Measu re the amoun t of flexu re;
i
f the measu remen t
exceeds the reference val ue, replace. Caref ul
l
y check to
see if the core is scratched.
C,
Checking Armature Coil Short-Circuited
1)
Set the armature on the ar matu re tester. Rotate the
armatu re whi le touch
i
n g it wi th steel piece.
2)
I
f the steel piece starts to vi brate or to be attracted some-
where on the armatu re, this suggests that the coi
l
contains
a
l
ayer short at that poi n t.
3)
I f
faul ty, repl ace.
@
Checking Field Coil Breakage
1)
)
To check cond uction , pl ace the tester probes onto
the lead and b rush .
2)
I
f either are n ot cond ucti ng, replace.
93
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