TM 9-4120-360-14
(2) Remove 18 screws and washers from the four edges of the cover,
(3) Slide the cover off the air conditioner by pulling or pushing on the aluminum frame near the corners. If
the cover is stuck to the casing with dried mud or other debris, carefully insert a putty knife, paint scraper or similar blade
between the cover and the casing to separate them. If difficulty is still encountered, place a clean wood block near each
comer in turn, and drive the cover off with a light hammer.
c. Cleaning. Clean the fabric cover and the portion of the casing from which it was removed, using a detergent
solution and viscose sponge or cloth. Use a soft scrubbing brush if necessary to remove caked-on dirt. Rinse with clear
water, and air dry.
d. Inspection/Repair Inspect the fabric cover for rips, cuts. tears or punctures in the fabric, and for damaged or
missing parts of the slide fastener. Repair punctures and minor cuts, rips or tears up to 3 inches or 7.5 cm long by patching
the inside surface. For damage of greater extent, or missing parts of slide fasteners, replace the cover.
e. Lubrication. Lubricate the slide and the interlocking fingers of the slide fastener with a wax stick (crayon or
candle) or spray lubricant. Operate the slide several times in each direction to distribute the lubricant.
f. Installation. With the flap closed and fastened, place the fabric cover on the air conditioner with the two tapes
at the top, inside. Press the aluminum frame-work around all four edges to seat the cover on the casing. When the eyelets
in the cover are aligned with the screws holes in the casing, install 18 screws and washers to secure the cover.
4.8. Top Panel Assembly (See figure 4-4).
a. Description. The top panel is a flat aluminum plate which encloses the top of the air conditioner. Mating
edges are equipped with radio frequency interference (RFI) gaskets, and other areas are insulated to minimize heat
gain/loss and sound transmission. Internally threaded rivets are incorporated in the top rear edge of the top panel to
support the upper part of the fabric cover.
b. Removal. With the fabric cover removed, as instructed above, remove five screws from the rear flange of the
top panel. Remove 15 screws and packing washers from the top surface of the panel. Remove the panel.
Dry cleaning solvent (Fed. Spec. PD-680) used to clean parts is potentially dangerous to personnel
and property. Do not use near open flame or excessive heat. Flash point of solvent is 100F to 138F
(38C to 59C).
c. Cleaning. Clean the outside surface of the top panel with a cloth dampened with detergent solution or dry
cleaning solvent (Fed Spec P-D-680). Clean internal insulated surface with a dry dusting brush or a vacuum cleaner with
a brush attachment. Clean the surface of the gaskets with a cloth moistened in dry cleaning solvent (Fed Spec P-D-680).
d. Inspection/Repair. Inspect the top panel for dents, nicks, gouges or deformation. Inspect interior surface for
torn, loose or missing insulation and gasket material. Repair dents. nicks, gouges or deformation, using conventional
sheet-metal repair methods. Replace damaged gaskets or insulation in the following manner:
(1) Remove as much old insulation or gasket as possible by pulling it off or scraping it away from the metal
surface.
Acetone and methyl-ethyl ketone (MEK) are flammable, and their vapors can be explosive. Repeated
or prolonged skin contact or inhalation of vapor can be toxic. Use in a well ventilated area, wear
gloves, and keep away from sparks or flame.
(2) Soften and remove old adhesive and the residue of insulation or gaskets, using acetone or MEK and a
stiff brush.
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