TM 9-4120-388-14
4-83. EVAPORTOR AND CONDENSER FAN MOTOR (B2) AND CONDENSER FAN - Continued.
e.
The condenser fan is easily damaged. Use care when installing fan not to damage
fan or tubing insulation.
(1)
Carefully insert condenser fan into housing. Open end of fan must face down.
The following steps require two people.
(2)
Insert motor mounting plate into position with the insulation side facing up.
(3)
Position motor into unit. Take care that fan is not damaged.
(4)
Lift motor high enough to allow assembly of motor to motor mounting plate hardware.
Be sure four grommets are in place on motor mounting plate.
(5)
Align marks on motor and motor mounting plate made at disassembly. (See para 4-63c (6) above.)
(6)
(7)
Secure motor mounting plate with four capscrews, spacers and flat washers.
Install four nuts on top of motor mounting cap screws.
(8)
(9)
Slip fan onto motor and set motor into position on fan housing.
(10) Looking into condenser fan discharge opening, rotate fan and locate the two setscrew access notches
through fan blades.
(11 ) Slip fan down on motor shaft far enough to determine locations of the two flats on the motor shaft.
(12) Align setscrews with flats on motor shaft.
(13) Carefully slip fan up and tighten setscrews using special tool, 6 inch (152 mm) long arm hex "L" type key.
(14) Position motor junction box the same as before. (See para 4-63c (5) above.)
(15) Secure motor mounting plate to casing with six screws and flat washers.
Do not loosen setscrews far enough to allow them to slip off of flats.
(16) Using special tool, 6 inch (152 mm) long arm hex" L" type key, SLIGHTLY loosen two setscrews in condenser
fan hub.
(17) Position fan on shaft so that there is 0.03 to 0.06 inch (0.7 to 1.5 mm) clearance between the fan and the inlet
bell.
(18) Tighten setscrews.
(19) Spin fan by hand and be sure that there is still a 0.03 to 0.06 inch (0.7 to 1.5 mm) clearance between fan
and inlet bell. Adjust fan if necessary.
(20) Install handle and enclosure using six screws and lock nuts.
(23) Install evaporator fan inlet bell and evaporator fan. (See para 4-62.)