TM 5-4320-302-14
5-19.
ALTERNATOR (CONT)
Location/Item
Action
Remarks
21. Columix and
Inspect for gouged or discolored windings.
rotor
Discoloration
of
winding
insulation
indicates
an
overheated columix or rotor that may result in shorted or
grounded windings.
22. Rotor slip
Inspect for cracks, wear grooves, or other damage.
rings
Restore a smooth surface to the slip rings with P-C-458
crocus cloth. Reclean with P-D- 680 solvent and wipe
all residue from slip rings.
23. Rotor shaft
Inspect shaft for stripped threads, cracks, wear,
and body
or other damage. Inspect body for cracked or marred
pole fingers. Replace rotor if damaged.
24. All other parts
Inspect for cracks, distortion, or damaged threads.
Replace damaged parts.
TEST
25. Rotor
Set multimeter to resistance scale, touch probes
together, and adjust OHMS ADJUST for zero resistance.
Place a probe on each slip ring. A reading of zero
resistance indicates a short circuit in rotor winding;
replace rotor. A reading of infinite resistance indicates
an open circuit in rotor winding; replace rotor. Place one
test probe on one of the slip rings and the other probe
on a rotor pole finger. The multimeter should indicate
infinite resistance. If anything less than infinite
resistance is indicated, replace rotor.
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