Repair Fan, Ventilating (Supply Fan #6).

TM 55-1905-223-24-17

2-28. Repair Fan, Ventilating (Supply Fan #6). (FIGURE 2-18)

This task covers:

a. Adjustment,

b. Removal,

c. Repair,

d. Replacement.

INITIAL SETUP

Tools

Equipment Condition

Tool kit, general mechanic's,

Circuit breaker switch 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 location.

Tag, Item 1, Appendix C

Ventilating fan P/N 717234-01

V-belt P/N 725537-34

WARNING

Make sure electrical power is OFF to avoid personal injury.

ADJUSTMENT

a. Adjust and align fan and motor pulleys.

(1)

Remove mounting bolts (11) and remove weather cover (1) for access to belt and motor.

(2)

Visually check pulley alignment before adjusting V-belt tension. Loosen bolts, nuts, and lockwashers

(4) to relieve tension on belt.

(a)

Make sure motor pulley (9) is aligned properly with fan pulley (7).

(b)

To align pulleys, loosen the four bolts, nuts, and lockwashers (3) holding the motor (2) to the

base plate (10) and adjust the motor as required.

(c)

When pulleys are aligned, secure bolts, nuts, and lockwashers (3) firmly.

b. Adjust V-belt tension.

2-77