TM 9-4120-357-14
Table 4-1. UNIT PREVENTIVE MAINTENANCE CHECKS AND SERVICES
Q-Quarterly
Total man-hours required: 4.7
Sequence
Item To Be Inspected
Work time
Number
Procedure
(man-hours)
WARNING
Hearing protection must be worn when maintenance is per-
formed while air conditioner is in operation. Failure to
heed this warning can result in hearing loss or injury.
1
0.4
Check for bent or damaged blades and frame, and for
freedom of operation. Straighten bent blades or frame by
hand, if possible. To remove the louvers for repair or
replacement, remove 12 screws and washers from edges of
each intake louver frame, and 16 screws and washers from
the discharge louver frame. Apply light machine oil to
pivots of louver blades to restore freedom of operation, if
necessary. Blot up any excess oil with cloth or paper towel.
2*
AIR FILTERS
0.5
WARNING
Dry cleaning solvent, P-D-680, used to clean parts, is
potentially dangerous to personnel and property. Avoid
repeated and prolonged breathing of vapors and skin
contact with the liquid. Do not use near open flame or
excessive heat. Flash point of solvent is 100 to 138
F
F
(38 to 59 ).
C
C
Clean and service, or replace if damaged. Remove filter
covers by unscrewing six panel fastening screws from each
cover. Slide filters out for servicing. Clean filters by
agitating them in a bath of detergent solution or dry
cleaning solvent (Fed Spec P-D-680). Shake or blow dry.
3*
MIST ELIMINATOR
0.7
Clean, or replace if damaged. Remove the mist eliminator
by removing 31 screws and washers from the top panel, and
remove top panel. Mist eliminator slides up out of brackets.
Clean the mist eliminator by agitating it in detergent
solution and rinsing it in clear water. Install it in brackets
in front of the evaporator coil, making sure that the top
mark is up, facing forward. Install the top panel, and secure
with 31 screws and washers.
4
EVAPORATOR COIL
0.2
Inspect for bent or crushed fins. Straighten with a plastic or
wood blade if necessary. Clean with compressed air.
4-4