Repair Fan, Ventilating (Exhaust Fan #7)..(FIGURE 2-22)

TM 55-1905-223-24-17

2-32. Repair Fan, Ventilating (Exhaust Fan #7)..(FIGURE 2-22)

This task covers:

a. Removal

b. Repair

c. Replacement

INITIAL SETUP :

Tools

Equipment Condition

Tool kit, general mechanic's,

Circuit breaker switch OFF, power panel

locked and tagged "Out of Service -

Tool kit, electrician's,

Do Not Operate."

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

Materials/Parts

operation and equipment location.

Tags, Item 1, Appendix C

Ventilating fan P/N 879030-06

Explosion-proof motor

P/N 1HP-860230/3-lSP

REMOVAL

WARNING

Make sure electrical power is OFF to avoid personal injury.

a. Tag and disconnect electrical wiring from terminal box on motor (8).

b. Disconnect housing (1) at inlet flange (3) and outlet flange (4).

c. Remove mounting screws (6) from drive support (5) and remove fan assembly.

REPAIR

Repair consists of replacing the explosion-proof motor (8).

a. Remove motor:

(1) Remove nuts (9) from studs (10) to detach drive support (5) from housing (1).

(2) Loosen the blower wheel (2) on the shaft of the motor (8). Slide the blower wheel off the motor

shaft. Slide drive support, motor, and blower wheel assembly from housing.

2-92