3-64. TRACTION MOTOR ASSEMBLY (cont)
CLEANING, INSPECTION, AND REPAIR (cont)
Clean, inspect, and repair armature (37) by the following:
Drycleaning solvent P-D-680 is 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 - 50°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.
Drycleaning solvent must not get on commutator, copper parts, coils, and windings.
Damage to equipment will result.
Damaged armature must be repaired at depot level maintenance facility.
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.
Use a wiping rag dampened with drycleaning solvent and wipe armature surface to remove external grease
and dirt. Dry with compressed air.
Remove heavy, caked deposits of dirt in ventilation holes of armature with a drill, reamer, or wire brush.
Inspect for journal damage. If journal shows signs of bearing slippage, replace armature.
Inspect pinion end of journal. Check that threads are not damaged. Check that surface where pinion gear
mates is smooth. Use a find grade of sand paper and polish surface.
Inspect varnished surfaces of coil insulation. Replace insulation if blistered, flaked, or cracked.
Check that bands are tight and secure and that soldering is intact.