3-36. MAIN GENERATOR (cont)
CLEANING, INSPECTION, AND REPAIR (cont)
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 a mica undercutter and regroove mica.
Clean slots between copper 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.
Use dry compressed air and remove loose mica and copper from commutator.
Do not paint gasket surfaces.
Paint surfaces of coil insulation with red insulating varnish.
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
Use a cloth dampened with drycleaning solvent and remove dirt and foreign material from stator frame and
field assembly. Dry with compressed air.
Check that field coils, leads, and cable connections are secure.
Check that shunt and interpole fields are tight.