3-37. MAIN GENERATOR (cont)
CLEANING, INSPECTION, AND REPAIR (cont)
(2) Check that mica is undercut to a depth of 1/16 to 3/32 inch (1.6 to 2.4 mm). If mica depth is not within these
limits, use an undercutter and regroove mica.
Do not damage commutator bars during cleaning process.
(3) Clean slots between commutator bars to remove burrs.
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.
(4) Use dry compressed air and remove loose mica and copper from commutator.
Do not paint gasket surfaces.
g. Paint surfaces of coil insulation with electrical insulating varnish.
25. Clean, inspect, and repair stator frame assembly 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 - 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.
a. Use a wiping rag dampened with drycleaning solvent and remove dirt and foreign material from stator frame
and field assembly. Dry with compressed air.