TM 9-4120-402-14
4-24. FRESH AIR FILTER.- continued
WARNING
Dry cleaning solvent used to clean parts is potentially dangerous to personnel
and property. Do not use near open flame or excessive heat. Use in well
ventilated area.
b. Clean.
(1) Immerse filter (5 in a mild detergent solution or dry cleaning solvent.
)
(2) Agitate until dirt is removed, using a soft brush if necessary to loosen caked-on dirt.
(3) Rinse in clear water or dry cleaning solvent.
(4) Drain, then hold filter horizontally and tap each edge on bench or floor to dislodge droplets.
(5) Be sure filter is totally dry prior to installation.
c.
Inspect.
(1) Check filter (5) for punctures, cuts, and damaged edges that would allow passage of unfiltered air.
(2) Check filter (5) for packed or mashed areas that would block air flow.
(3) Replace filter (5) if found bad.
d. Install.
(1) Place filter (5) into unit with UP marking pointing up and directional arrow pointing in toward unit.
(2) Secure fresh air screen (4) to casing with two flat head screws (1) and five sets of pan head screws (2) and
flat washers (3).
4-80
