Repair Motor, Electric, Alternating Current (SF #3). (FIGURE 3-9)

TM 55-1905-223-24-17

3-18. Repair Motor, Electric, Alternating Current (SF #3). (FIGURE 3-9)

This task covers:

a. Removal

b. Repair

c Replacement

INITIAL SETUP :

Tools

Equipment Condition

Tool kit, general mechanic's,

Circuit breaker switched OFF, power

panel locked and tagged "Out of

Tool kit, electrician's,

Service - Do Not Operate."

See TM 55-1905-223-10 for HVAC systems

Materials/Parts

operation and equipment.

Tag, Item 1, Appendix C

Alternating current electric motor

P/N 311890750

Motor stator P/N 311890750-2

Motor rotor P/N 311890750-3

Shaft P/N 311890750-6

Bearings P/N 416821-2D

Woodruff key P/N 311890750-21

REMOVAL

WARNING

Make sure electrical power is OFF to avoid personal injury.

a. Remove ventilating fan, vane section, and impeller (paragraph 3-17).

b. Tag and disconnect electrical wiring to motor jack box (20).

Disconnect lubricating tubes from grease entries (4, 13).

d. Remove mounting bolts (19) from motor base.

e. Remove the motor (1) from the fan unit.

REPAIR

Repair consists of replacing motor bearings.

a. Disassemble motor as follows:

3-40