TM 55-2210-224-34
3-64. TRACTION MOTOR ASSEMBLY (cont)
CLEANING, INSPECTION, AND REPAIR (cont)
Table 3-6. Traction Motor Data (continued)
ITEM
SPECIFICATION
Commutator Data
Type
Arch Bound
Diameter (new)
8-1/2 in. (215.9 mm)
Diameter (minimum worn)
8 in. (203.2 mm)
Side mica thickness
0.045 in. (1.14 mm)
Side mica grooving depth
3/64 in. (1.19 mm)
Armature Bearing, Commutator End
Grease capacity (2/3 full)
5 oz (141.7 g)
Type lubricant
Ball and Roller Bearing
Grease (RA-71005) (93508)
Armature End Play
Normal adjustment
0.002 to 0.004 in.
(0.05 mm to 0.10 mm)
Wear limit
0.010 in. (0.25 mm)
High-Potential Test Voltages (at 60 cycles ac)
CAUTION
To prevent damage to equipment increase slowly
from zero to given value, hold for 60 seconds, and
decrease slowly to zero.
Motor with rewound armature and new field coils
2500 volts
Motor with old armature and field coils
reconditioned
1750 volts
3-248
