3-62. TRACTION MOTOR ASSEMBLY (cont)
CLEANING, INSPECTION, AND REPAIR (cont)
32. Clean, inspect, and repair armature assembly by the following:
Drycleaning solvent P-D-680 it; toxic and flammable. Wear protective goggles and gloves and use only
in a well-ventilated area. Avoid contact with skin, eyes, and clothes and don't breathe vapors. Do not
use near open flame or excessive heat. The flash point is 100-138°F (38-59°C). If you become dizzy,
get fresh air immediately and get medical aid. If contact with eyes is made, wash your eyes and get
medical aid immediately.
Compressed air used for cleaning purposes will not exceed 30 psi (207 kPa). Do not direct compressed
air against skin. Use goggles or full face shield.
Check that drycleaning solvent does not get on commutator, copper parts, coils, and windings. Damage to
equipment will result.
a. Blow carbon dust from armature assembly with compressed air. Direct air into the pockets and through the
openings of the armature to remove internal accumulation of dirt.
b. Use a cloth dampened with drycleaning solvent and wipe armature surface to remove external grease and dirt.
Dry with compressed air.
c. Inspect for shaft damage. If shaft shows signs of bearing slippage, replace armature.
d. Inspect pinion end of shaft. Check that threads are not damaged. Check that surface where pinion gear mates is
smooth. Use a fine grade of sandpaper and polish surface.
Check insulation bands for blisters, cracks, or breaks. Armature must be repaired at depot level
e. Inspect varnished surfaces of coil insulation.
f. Check that bands are tight and secure and soldering is intact.