DISASSEMBLY (Cont) - TM-5-4120-393-140215

TM 5-4120-393-14

5-5.1. Evaporator Fan Motors (B3A and B3B) (Reliance Electric Model) (F60T-2HS Only) (cont)

To replace bearings (11):

Match-mark motor frame and stator (3) and both end shields (4) and (5) to ease reassembly.

Using screwdriver and wrench, remove four studs (6), nuts (7), and lock washers (8).

Carefully separate end shields (4) and (5) from motor frame (3). Use a brass or plastic bar and hammer and tap

end shields away from motor frame. Tap opposite sides, top, and bottom in alternating sequence to break end

shields loose,

It may be necessary to remove cord bushing (10).

Pull end shields (4) and (5) away from motor frame (3) far enough to gain access to bearings (11).

Pull or carefully drive bearings (11) off of rotor assembly (12). Note location and retain load spring washers(s)

(13) for use at reassembly if not damaged.

Examine rotor (12), motor frame and stator (3), and shafts for nicks, gouges, deformations, and evidence of

overheating.

Dress high metal defects in shafts with a fine file or stone. If rotor or stator are beyond repair, replace motor.

Coat shaft surfaces with oil.

Coat the bearing cavity of each end shield, (4) and (5), with oil and insert load spring washers (13), and bearings

(11) in same locations as removed from in step (f) above.

Carefully work end shield assemblies (4) and (5) onto shaft ends keeping the match-marks made at time of

disassembly in alignment.

Carefully align mounting holes.

m. Using screwdriver and wrench, secure end shields (4) and (5) with four studs (6), nuts (7) and lockwashers (8).

Before final tightening of screws, check for freedom of rotation by turning shaft by hand. There should be no drag

or binding. Adjust as necessary and tighten screws. Check again for binding and drag.

Check end play of shaft. End play should be 0.003 inch. If end play is not within limits, disassemble motor and

add or remove bearing thrust washers to adjust.

Install motor. See para 4-56.

Change 4 5-9