TM9-4120-400-14
EVAPORATOR FAN MOTOR REPAIR. - continued
5-7.
a. To replace connector (1):
(1) Loosen cable clamp (2).
(2) Tag and unsolder leads.
(3) Remove old connector (1).
(4) See wiring diagram figure 4-4 and tags and solder leads to new connector (1). Remove tags.
(5) Secure cable clamp (2).
b. To replace overload (thermal) protectors (3):
(1) Remove two screws (4) and lock washers (5) from thermal overload protector housing (6).
(2) Remove housing (6).
(3) Tag and disconnect leads to overload protector (3).
(4) Remove old overload protector (3).
(5) See tags and connect Ieads to new overload protector (3). Remove tags.
(6) Install overload protector housing (6) with two screws (4) and lock washers (5).
c. To replace bearings (7 and 8):
(1) Match-mark stator (9) and both end bells (10 and 11) to ease reassembly.
(2) Remove four locknuts (12), eight flat washers (13), and four through bolts (14) from motor.
(3) Remove screw (15), lock washer (16), and loop clamp (17) from the side of stator.
(4) Carefully separate rear end bell (10) from stator (9). Tap rear end bell away from stator. Tap opposite
sides, top, and bottom in alternating sequence to break end bell loose.
(5) Carefully separate front end bell (11) from stator (9) being carefull to avoid damaging wires. Tap front
end bell away from stator. Tap opposite sides, top, and bottom in alternating sequence to break end
bell loose. Wires may be left in place if care is taken to avoid damaging them.
(6) Press out or carefully drive bearings (7 and 8) out of end bells (10 and 11). Remove and retain shims
(18) and thrust washer (19) for use at reassembly if they are not damaged.
(7) Examine rotor (20), stator (9), and shaft for nicks, gouges, deformations, and signs of overheating.
Replace motor if defective.
(8) Coat shaft surfaces of rotor with oil and slide bearings (7 and 8) on shaft ends. They should seat
against shoulders at inner ends of shaft.
(9) Coat thrust washers (19) and shims (18) with oil and slide them over each end of shaft with the thrust
washers (19) next to the bearings.
(10) Coat bearing cavity of each end bell (10 and 11) with oil. Slide end bell carefully into position over
shaft so that OD of bearing enters ID of bearing cavity in end bell. Work end-bells onto shaft until bore
fits over end of stator. Keep the match-marks made at time of disassembly in alignment.
5-12
