Repair Fan, Ventilating (Supply Fan #3) - TM-55-1905-223-24-170176

TM 55-1905-223-24-17

3-17. Repair Fan, Ventilating (Supply Fan #3). (FIGURE 3-8)

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

Ventilating Fan P/N 44-12-DG2

Bushing P/N 402000010

Impeller P/N 6518700Z0

REMOVAL

WARNING

Make sure electrical power is OFF to avoid personal injury.

a. Turn power OFF.

b. Tag and disconnect electrical wiring to the fan.

Remove mounting hardware (5, 6, 11, 12) from each end of the fan (1). This will disconnect the fan

from companion flange (7) on each end of ducting.

d. Remove the fan unit.

REPAIR

a. With the fan unit removed, disconnect the vane section (4) of the fan unit (1) by removing mounting

hardware (2, 3).

b. Remove the impeller (9) from the shaft of the motor (10).

Remove the bushing (8) from the impeller (9).

3-37