TM9-4120-400-14
4-13.
RETURN AIR LOUVER AND AIR FILTER. - continued
REMOVAL
1. Remove eight screws (1) and lock washers (2) and pull louver (3) from unit.
2. Remove filter (4) from clips on back of louver.
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.
CLEANING
1.
Usually it is only necessary to wipe or brush the dirt from the louver. If the louver is extremely dirty, it can be
washed following the same procedure as the filter.
2,
Immerse filter in mild detergent solution or dry cleaning solvent.
3. Agitate until dirt is removed, using a soft brush if necessary to loosen caked-on dirt.
Rinse in clear water.
4.
Drain, then hold filter horizontal and tap each edge on bench or floor to dislodge droplets.
5.
6.
Be sure filter is totally dry prior to installation.
INSPECTION
1. Check filter (4) for punctures, cuts, and damaged edges that would allw passage of unfiltered air.
2. Check filter (4) for packed or mashed areas that would block air flow.
3. Replace filter (4) if found bad.
INSTALLATION
1. Sparingly apply air filter coater.
2. Airflow arrows should point away from louver.
3. Place filter (4) in retainer clips.
4. Secure louver(3) with screws (1) and lock washers (2).
NOTE
FOLLOW-ON MAINTENANCE:
Connect power at power source.
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