REPAIR - TM-55-1905-223-24-170114

TM 55-1905-223-24-17

(2)

Tag and disconnect electrical wiring from terminal box (9, FIGURE 2-20).

(3)

Loosen setscrew (11, FIGURE 2-19) and remove the impeller (10) from the shaft of the motor (1).

(4)

Remove mounting bolt, nut, and washer assemblies (9).

(5)

Withdraw the motor (1) from the fan drum (7).

b. Removal of bearings (refer to FIGURE 2-20):

(1)

Remove screws (11) and fan cover (1) from motor housing (4).

NOTE

Place reference marks on end plates (3) and (7) and housing for reinstallation alignment.

(2)

Remove locking hub (10), external fan (2), thru bolts (12), and end plates (3) and (7).

(3)

Remove rotor (8) from motor housing (4).

(4)

Remove annular ball bearing (5) from non-drive end of the rotor (8) with a puller.

(5)

Remove bearing (6) from drive shaft with a puller.

c. Replacement of bearings (refer to FIGURE 2-20):

(1)

Install new bearing (6) onto drive shaft with a press.

(2)

Install new annular ball bearing (5) onto non-drive end of the rotor (8) with a press.

(3)

Position the rotor (8) in the motor housing (4).

NOTE

Align end plates (3) and (7) using marks previously made during disassembly.

(4)

Install end plates (3) and (7).

(5)

Install four thru bolts (12), external fan (2), and locking hub (10).

(6)

Install fan cover (1), and screws (11).

d. Lubricate the motor bearings with 1 or 2 shots from a general purpose grease gun.

2-85