Section XIII. MAINTENANCE OF FAN MOTORS

TM 5-4120-352-14

c. Cleaning and Inspection. Wipe off all accu-

each heater element.

(2) Install washer, lock washer and nut on

mulated dirt from heater elements and inspect for

each heater element. Secure support with two

visible damage to element or leads. Check each

screws, washers, and lockwashers.

heater element for continuity. Replace defective

(3) Refer to wiring diagram and make con-

heaters. Repair damaged leads.

nections to heaters.

d. Installation. Refer to figure 4-10 and install

(4) Refer to figure 4-5 and install housing

heater elements as follows:

covers.

(1) Insert heaters in bracket and support with

an insulating washer between bracket and flange of

Section XIII. MAINTENANCE OF FAN MOTORS

c. Place one multimeter probe against the motor

4-36. General.

housing and the other against one of the motor ter-

The evaporator fan and condenser fan motors are

minals. If continuity is indicated, the motor is

identical. The evaporator fan and motor are moun-

grounded.

ted on a common base in the lower front compart-

d. Replace motor if open or grounded.

ment of the air conditioner. The condenser fan

NOTE

motor is mounted on a separate base in the rear

There are separate circuits through the thermal

compartment of the air conditioner.

protectors on high and low speed circuits; check for

continuity across terminals in the same circuit,

Refer to wiring diagram.

4-37. On-Equipment Testing.

a. Disconnect motor lead electrical connector.

4-38. Fan Motors.

b. Use a multimeter and test for continuity

a. Evaporator Fan Motor. Refer to figure 4-11

across each combination of two motor terminals. If

and remove evaporator fan motor as follows:

continuity is not indicated, the windings are open

and the motor should be replaced.

4-25