TM 9-4120-357-14
CAUTION
Do not clean bearings in solvent. They are permanently lubricated and sealed at
time of manufacture.
(3) If
the bearings are to be
re-used, store them in
plastic bags or
wrap in
grease-proof paper until needed
for assembly.
(4) Remove two screws, and remove the thermal overload protector (2) from the end bell (1). Tag wires for
identification and unsolder them.
(5) Remove four screws from the electrical receptacle (3), and carefully pull the receptacle away from the
junction box (4). Tag wires for identification, and unsolder them.
(6) Remove four screws that attach the junction box (4) to the motor stator (5). Remove the junction box.
(1) Lead wires from the motor stator (5) through the junction box (4), and attach the junction box to the
motor frame with four screws.
(2) Solder wires to
the proper connections in
receptacle (3). (See figure 4-16, Wiring Diagram.) Attach the
receptacle to the junction box with four screws.
(3) Solder wire connections to
the thermal overload protector (2, figure 4-4), and attach the protector to
bosses in the end bell (1) with two screws.
CAUTION
Bearings are lubricated and sealed at time of manufacture. Do not clean with
solvent or attempt to relubricate them at time of assembly.
(4) Install bearing (6) in end bell bearing cavity, and place end bell on motor frame. Secure end bell with six
screws, tightened in increments in alternating sequence. Tap all around end bell with a plastic or rawhide mallet
before final tightening.
(5) Set motor on end, with open end up, and carefully install rotor (7). Secure end bell with six screws
tightened in increments in alternating sequence. Tap all around end bell with a plastic or rawhide mallet before
final tightening. Turn shaft by hand to check for freedom of rotation before installing.
(6) Connect a source of 208-volt, 3-phase, 60 Hz power, and check for proper operation before installing.
f. Installation. Install the condenser fan and motor in
the air conditioner as
follows:
(1) Install the motor on the motor mount by inserting it through the fan discharge hole in back of unit. Attach
it to the mounting plate with four capscrews, flat washers and lock washers, finger tight.
CAUTION
Do not hammer impeller onto shaft. Motor bearings would be damaged. If
difficulty is encountered, clean shaft and dress out nicks or rough spots with a
fine file, stone or abrasive paper, then apply a film of light machine oil, (SAE 10
lubricating oil or equivalent).
(2) Align keyways, and press the impeller (13, figure 4-4) onto the motor shaft. Tighten the setscrews in
the hub
of the impeller.
(3) Check the clearance between the impeller blades and the fan shroud. Clearance should be 0.080-0.150 inch
(2.03-3.81 mm) and should be evenly divided, top and bottom, and side to side. Adjust with shims (11 and 12) under the
mounting feet of the motor until clearance is evenly divided. Tighten motor mounting screws. Rotate the impeller by
(4) Install the electrical plug, P2, in the receptacle on the motor junction box.
(5) Install the junction box and control panel assembly in the air conditioner. Secure with six screws (7, figure
4-3) through the casing into the mounting flange, and two screws (8) and washers (9), through the lower right-hand
mounting bracket.
4-55