ARMY TM 9-4120-380-14
AIR FORCE TO 35E9-136-21
4.26 RETURN AIR FILTER. This task covers inspection, removal, service, repair/replace and installation.
Tool kit, service, refrigeration unit (Item 1, Appendix B)
Disconnect input power to the air conditioner before performing any internal
maintenance Voltages used can KILL. Shutting the unit off at the control panel does not
disconnect unit power.
Disconnect air conditioner input power at source
a. Check that filter (1) is not bent, cracked or punctured (see fig NO TAG).
b. Check that captive fasteners (2) are not damaged or missing
Loosen two captive fasteners (2).
b. Remove filter (1)
Clean filter (1) with mild detergent and water.
b. Spray filter with air filter oil.
Repair consists of replacing captive fasteners (2) or replacing filter (1)