Repair Fan, Ventilating (Supply Fan #4). (FIGURE 3-10)

TM 55-1905-223-24-17

3-19. Repair Fan, Ventilating (Supply Fan #4). (FIGURE 3-10)

This task covers:

a. Repair

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

Impeller P/N 783078-36

Bearings P/N 716625-03

Shaft P/N 717189-01

Grease lines P/N 716661-02

Bushings P/N 725539-14

Fan bushing P/N 725409-10

REPAIR

WARNING

Make sure electrical power is OFF to avoid personal injury.

a. Remove ventilating fan (paragraph 2-26).

b. Remove electric motor (1) and V-belt (19) from fan unit (paragraphs 2-26 thru 2-28).

Replace grease lines (7):

(1)

Disconnect the two grease lines (7) on the inside and outside of fan drum (6).

(2)

Install new grease lines (7) to inside and outside fittings on fan drum (6).

d. Replace impeller (3), fan bushing (4), and machine key (16):

(1)

Remove impeller nosepiece (2).

(2)

Remove impeller (3) and machine key (16) from fan shaft (15).

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