TM 9-4120-360-14
Section III. PREVENTIVE MAINTENANCE CHECKS AND SERVICES
4.5.
Use of the Table
Table 4-1 is arranged in the sequence that will be most convenient for you. For example, maintenance of the air filter,
Item 2, follows maintenance of grilles, Item 1, which must be removed for access. Panels and grilles may be left off until
all checks have been completed. Electrical power should be disconnected from the air conditioner for all checks except
the final operating check of the controls.
Not Fully Mission
Item to be
Item
Capable If:
Procedures
Inspected
Number
Louver blades bent
1
Check for bent or damaged louver
Grilles and louvers
beyond repair, or missing.
blades and frames. Check freedom
Frame deformed, torn or
of operation. Straighten bent
broken.
blades or frame by hand, if
possible. To remove grilles for
repair or replacement, turn six
cam-lock studs a quarter-turn
clockwise. Apply light machine oil
to pivots of louver blades to restore
freedom of operation, if necessary.
Blot up excess oil with cloth or
paper towel.
2*
Filter is perforated
Clean and service, or replace if
Air Filter
(1/4-inch hole or larger)
perforated, torn or otherwise
through center thickness,
damaged. Clean filter by agitating
or frame is bent or
in detergent solution or dry
damaged beyond repair.
cleaning solvent (Fed Spec P
D-680). Shake or blow dry.
Disconnect power from the air conditioner
before exposing the electrical system. The
voltage used can be lethal.
3*
Mist eliminator is missing
Remove 18 screws and washers
Mist Eliminator
or damaged.
from top panel, and remove top
panel. Slide mist eliminator up out
of channels. Clean by agitating in
detergent solution and rinsing in
clear water. Inspect for punctures,
tears or deformation. Replace if
damaged. Install in channels in
front of evaporator coil, making
sure that TOP mark is up, and that
airflow arrows point outward.
4-6
