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

Conditioned Return Air Filters

a. Remove, clean, inspect, and service filters.

b. Discard filter and obtain replacement, if damaged.

Fresh Air Filter

a. Remove, clean, inspect, and service filter.

b. Discard filter and obtain replacement, if damaged.

Fresh Air Damper

a. Wipe or vacuum all dust or dirt from the fresh air

damper door and its operating mechanism, and all

other surfaces in the area.

b. Inspect components for condition, and all mounting

hardware for tightness and security.

c. Check operation of door and mechanism for stiffness

and binding; lubricate as necessary. Be sure to wipe

off all excess lubricant.

d. Check to be sure the damper door seats properly to

form a seal when in the closed position.

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