TM9-4120-401-14
Unit Preventive Maintenance Checks and Services (PMCS) Quarterly Schedule
Paragraph
Procedures
Item to be
Item
Reference
Inspected/Serviced
Number
4-18
a. Check operation of louvers (1) for stiffness or binding.
Return Air Louver
1
b. Remove, clean, inspect, repair, and lubricate as
necessary.
c. Set aside for the present and reinstall after item 4.
4-18
a. Remove, clean, inspect, and service filter (2).
Conditioned Air Filter
2
b. Discard filter (2) and obtain replacement, if damaged.
c. Place filter aside for the present and reinstall after item 4.
4-43
a. Wipe all dust or dirt from fan (3), motor (4), and all other
Conditioned Air (Evaporator)
3
components and surfaces in the area.
Fan and Motor
b.Inspect fan (3) for damaged or bent blades, the motor (4)
for signs of overheating, and all mounting hardware for
tightness and security.
c.Inspect wiring harness (5) for damage or chafing and all
electrical connections for tightness.
