Table 4-1. UNIT PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) QUARTERLY SCHEDULE (cont)

TM 5-4120-393-14

Table 4-1. UNIT PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) QUARTERLY SCHEDULE (cont)

Item

Item To Be

Procedures

No.

Inspected/Serviced

b. Inspect heating elements and thermostat for obvious

damage, and all mounting hardware for tightness and

security.

c. Inspect wiring harness for damage or chafing and all

electrical connections for tightness.

Evaporator Fans and Motors

a. Wipe or vacuum all dust or dirt from the fans, motors,

and all other components and surfaces in the area.

b. Inspect the fans for damage or bent blades, motors for

signs of overheating, and all mounting hardware for

tightness and security.

c. Check that fans spin freely.

d. Inspect wiring harness for damage or chafing and all

electrical connections for tightness.

e. Generally inspect refrigeration system components in

the upper sec tion for condition.

Conditioned Air Intake Grille

a. Check operation of louvers for stiffness or binding.

b. Remove, clean, repair, and lubricate grille as

necessary.

Lower Front Panel

a. Be sure input power has been turned off, then

disconnect the input power connector if the optional

front panel input location has been used.

b. Remove, clean, and inspect the front panel.

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