TM 9-4120-402-14
5-9. EVAPORATOR AND CONDENSER FAN MOTOR (B2) REPAIR. - continued
16 Coat bearing spacer washers (20), shim (16), and bearing washer (15) with oil.
17 Coat bearing cavity of frame/stator (11) and end bell bracket (12) with oil.
18 Install bearing spacer washers (20) and new ball bearing (10) into frame/stator (11).
19 Position bearing retainer (19) in place and secure with four screws (18).
20 Carefully insert rotor/shaft (17) into frame/stator (11) and slip shaft into ball bearing.
21 Slip ball bearing (9), shim (16), and bearing washer (15) onto rotor/shaft (17).
22 Carefully slip end bell bracket (12) onto rotor/shaft (17) keeping the match-marks made at time of disassembly
in alignment. Secure with eight sets of screws (13) and lock washers (14). Before final tightening, check for
freedom of rotation by turning shaft by hand. There should be no drag or binding. Correct as necessary and
tighten screws. Check again for binding and drag.
23 Check end play of shaft. End play should be 0.002 -0.005 inch (0.051 - 0.127 mm). If end-play is not within
limits, disassemble motor and add or remove bearing spacer washers (20) to adjust. Check again for binding
or drag.
(2)
IMC Magnetics motor.
(a)
To replace connector (1):
1
Remove four sets of screws (2) and lock washers (3).
2
Pull connector (1) as far out of terminal box as wire leads will allow.
3
Tag and unsolder wire leads from connector (1). (See paragraph 4-26.)
4 See wiring diagram figure 4-10 and tags and solder leads to new connector (1).
Remove tags.
(See
5
Secure connector (1) to terminal box with four sets of screws (2) and lock washers (3).
NOTE
The thermal (overload) protector is not removable. If defective, the motor must be replaced.
(b)
To replace ball bearings (4) and (5):
1
Match-mark motor frame/stator (6) and end cap (7) to ease reassembly.
2
Remove six sets of screws (8) and lock washers (9).
3
Carefully pull end cap (7) from motor shaft.
4 Remove closing shim (10), shims (11, 12, 13, and 14), and two spring wave washers (15).
Inspect for
excessive wear, nicks, or breakage. Replace if damaged.
5-26
