TM 5-3805-262-34
INSPECTION/REPAIR (SHEET 4 OF 5)
j.
Inspect stator (3) for damaged windings and distortion. Inspect stator elec-
trical leads for cracked or broken insulation or broken wire strands at con-
nections to terminals. Replace stator if any of the above conditions are
seen, or if stator does not pass the following tests:
(1)
(2)
(3)
(4)
(5)
Set multimeter to X1 or diode
check range.
Hold either multimeter lead
on stator frame, other mul-
timeter lead on one stator
terminal. Multimeter should
indicate open circuit (mul-
timeter pointer should not
move).
Hold either multimeter lead
on stator terminal A, other
multimeter lead on terminal
C. Multimeter should indi-
cate continuity (multimeter
pointer should move).
Repeat step (3) above at
terminals A and B.
Repeat step (3) above at
terminals B and C.
k.
Inspect rotor (44) for loose coils, broken slip ring connections, scored
slip rings, damaged threads, and worn or pitted shaft at bearing areas.
Clean dirty slip rings using No. 600 abrasive cloth, turning rotor to pre-
vent flat spots. Mount rotor in V-block holder and measure runout of each
slip ring using dial indicator. Runout of each slip ring should not be more
than 0.002 inch. If runout is greater than 0.002 inch, turn rotor slip rings
in a lathe. Replace rotor if any of the above conditions are seen, or if
rotor does not pass the following tests:
(1)
Set multimeter to X1 or diode
check range.
NOTE
In following step resistance
will be slightly higher at
higher temperatures, and
slightly lower at lower
temperatures.
(2) Hold either multimeter lead on one rotor
slip ring, other multimeter lead on second
slip ring. Multimeter should indicate 10.9
to 11.4 ohms at 80 degrees F.
Change 1
3-213
