TM 9-2320-289-34
4-2.
ALTERNATOR TESTING AND REPAIR (ALL EXCEPT M1010) (Con’t).
c .
CLEANING AND INSPECTION
WARNING
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l Dry cleaning solvent P-D-680 is toxic and flammable. Always wear
protective goggles and gloves and use only in a well-ventilated area.
Avoid contact with skin, eyes, and clothes and DO NOT breathe vapors.
DO NOT use near open flame or excessive heat. The solvent’s flash
point is 100°F-138°F (38°C-59°C). if you become dizzy while using
cleaning solvent, immediately get fresh air and medical help. if solvent
contacts eyes, immediately wash your eyes with water and get medical
aid.
l Compressed air used for cleaning purposes should never exceed 30 psi
(207 kPa). Use only effective chip guarding and personnel protective
equipment (goggles/shield, gloves, etc.). Failure to follow this warning
may result in serious injury to personnel.
Clean all metal parts except regulator, rectifier bridge, stator assembly, rotor, and bearing
assemblies in dry cleaning solvent. Dry with compressed air.
inspect brush holder assembly for damage. Replace brush holder assembly if damaged or if
brushes are worn to a length of 0.630 in. (16 mm) or less, If brushes are to be reused, clean
with a soft dry cloth.
Inspect insulating sleeves on insulated screws for splits or wear. Replace if split or worn.
Inspect end frame bearing for damage in accordance with TM 9-214. If bearing is damaged, or
if grease supply is used up, replace bearing. Do NOT lubricate bearing.
Inspect slip ring end of rotor shaft for overheating or scoring. If there are signs of overheating
or scoring, replace end frame bearing and rotor.
Inspect drive end bearing for damage in accordance with TM 9-214. Inspect seal in plate for
damage. If drive end bearing or seal are damaged, replace both bearing and plate.
Inspect stator assembly and rotor winding for burned insulation. Burned insulation appears as a
dark or blackened wiring. A strong acrid odor will be apparent. Replace stator assembly or
rotor if either looks burned.
Inspect stator assembly terminal connector for corrosion or breaks. If corroded or broken,
reploace stator.
Inspect windings on stator assembly for chipped insulation.
Repair stator insulation with
insulating varnish if possible. Replace stator if insulator cannot be repaired with insulating
varnish.
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