DISASSEMBLY (Cont) - TM-5-4120-393-140210

TM 5-4120-393-14

5-4. Evaporator Fan Motors (B3A and B3B) (Keco Industries Model) (cont)

Pull or carefully drive bearings (12) off of rotor assembly. Note location and retain wavy spring washer(s) (13)

and thrust washers (14) for use at reassembly if not damaged.

Examine rotor (15), stator (16), and shafts for nicks, gouges, deformat ions, and evidence of overheating.

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

Coat shaft surfaces with oil.

Coat the bearing cavity of each end shield, (7) and (8), with oil and insert thrust washers (14), wavy spring

washers (13), and bearings (12) in same locations as removed from in step (e) above.

Carefully work end shield assemblies (7) and (8) onto shaft ends keeping the match-marks made at time of

disassembly in alignment.

Carefully align mounting holes.

Using screwdriver, secure end shields (7) and (8) with four screws (9), nuts (10) and lock washers (11). 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.

m. 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.

NOTE: Pages 5-7 through 5-8.1 have been deleted.

5-6 Change 5