TM 55-2210-224-34
3-37.
MAIN GENERATOR (cont)
CLEANING, INSPECTION, AND REPAIR (cont)
Table 3-4. Main Generator (cont)
Item
Specification
Commutator Data
Type ................................... ................................. Arch bound
Diameter (new) .......................... .......................... 12 in. (304.8 mm)
Diameter (minimum worn) ................. .................. 11-3/8 in. (288.9 mm)
Side mica thickness ............................................. 0.030 in. (0.762 mm)
Side mica grooving depth ................ .................... 3/64 in. (1.19 mm)
Bearing Grease Capacity (70%) ............... ..................... 6-1/2 oz (1894.28 g)
Type .............................................................................. RA 71005 (93508)
Pole Bores (Measured between centers of opposite pole faces)
Exciting Field
Maximum .............................. ...........................
15.204 in. (386.18 mm)
Minimum .............................. ............................
15.185 in. (385.69 mm)
Commutating Field
Maximum ................................ .........................
15.597 in. (396.16 mm)
Minimum .............................. ............................
15.581 in. (395.75 mm)
Temperatures:
Temperature to heat flinger and bearing
housing before seating bearing ..........................
212 to 230°F (100 to 110°C)
Temperature to heat bearing and flinger
housing assembly before mounting on
armature shaft ...... ............................................
12 to 230°F (100 to 110°C)
Temperature to heat sleeve before mounting
on armature shaft .............. ...............................
212 to 230°F (100 to 110°C)
Torque to apply to armature fan cap-
screws when installing on armature
frame head ........................................................
180 to 225 lb.-ft
(244 to 305 N.m)
Weights (approximate, for lifting purposes only)
Magnet frame (coiled)...........................................
1550 lb (703.08 kg)
Armature ..............................................................
895 lb (405.97 kg)
Commutating pole piece and coil ..........................
3 5 lb (15.88 kg)
Exciting pole piece and coil ..................................
100 lb (45.36 kg)
Total generator ....................................................
2450 lb (1 111.32 kg)
3-157
