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

Mist Eliminator

a. Remove, clean, and inspect the top panel.

b. Remove, clean, inspect, and service the mist

eliminator.

c. Replace the mist eliminator If it is damaged.

WARNING

Compressed air used for cleaning

purposes will not exceed 30 psi (2.1kg/

cm ). Do not direct compressed air

against the skin. Use goggles or full face

shield.

Evaporator Coil

a. Blow accumulated dust and dirt out of the air passages

in the evaporator coil using compressed air or the

discharge side of a portable vacuum cleaner. Blow

from front to back in the opposite direction from

operational airflow.

b. Inspect coil for obvious damage and all mounting

hardware for tightness and security.

WARNING

Allow heaters to cool before touching.

Severe burns can result from touching hot

heaters

Heating Elements

a. Wipe or vacuum any remaining dust or dirt from the

heating elements, the heater thermostat, and all other

components and surfaces in the area.

NOTE

Use a clean dry cloth (or one slightly

moistened with water) for all wiping

operations. NEVER use an oily or

greasy cloth. Any oily residue left on

any surface will attract and accumulate

much more dust and dirt than dry

surfaces.

4-26