TM 55-2210-224-34
3-37.
MAIN GENERATOR (cont)
CLEANING, INSPECTION, AND REPAIR (cont)
d.
Paint the following with electrical insulating varnish:
CAUTION
Do not paint machined surfaces.
(1)
Fan
(2)
Inside surface of stator frame cover
(3)
Inside surface of main generator covers
e.
Paint the following with gray gloss enamel:
CAUTION
Do not paint gasket surfaces.
(1)
Coupler assembly
(2)
Inside surface of pulley
(3)
Outside surface of main generator covers
(4)
Outside surface of stator frame cover
29.
Refer to table 3-4 for main generator data.
Table 3-4. Main Generator
Item
Specification
Classification.................................................................. dc, 4-pole, self-excited, shunt-
wound, commutating pole, self-
ventilated
Nominal Rating - Input ................................................... 210 hp at 2100 rpm
Resistance AT 77°F (25°C) (Nominal)
Shunt Field ............................. ................................ 8.50 ohms
Commutating Field ....................... .......................... 0.0035 ohm
Starting Field .......................... ................................ 0.00280 ohm
Brush Data
Size (new) ............................................................... 1-1/4 x 3/4 x 2-1/2 in.
(31.75 x 19.05 x 63.5 mm)
Minimum worn length .............................................. 1-1/2 in. (38.1 mm)
Pressure per brush .................................................. 3 to 4 lb. (1.3 to 1.8 kg)
Brush holder to commutator clearance..................... 3/32 in. (2.38 mm)
3-156
