TM 9-4120-360-14
(3) Coat the mating surfaces of the metal and the insulating/gasketing material with adhesive. Let both
surfaces air dry until the adhesive is tacky but will not stick to the finger.
(4) Starting with an end or corner, carefully attach the insulation/gasket to the metal. Press into firm contact
all over.
e. Installation. Position the top panel on the air conditioner. and secure with 15 screws and packing washers
through the top surface. and five screws through the rear flange Install the fabric cover, and secure with 18 screws and
washers.
Air Intake and Discharge Grilles (See figure 4-5).
4.9.
a. Description. The evaporator air intake grille is equipped with vanes or blades which are connected by an
operating linkage so that all blades open or close together. This design is used to control the volume of air passing through
the grille so as to control. in turn. the volume of air drawn in through the fresh air screen when the damper is open. The
evaporator air discharge grille is equipped with two sets of independently mounted vanes. The horizontal vanes can be
positioned to direct the air upward or downward. The vertical vanes can be positioned to direct the air to one or both sides
of the center.
b. Removal. Both evaporator grilles are retained on the casing in the same way; with three cam-lock fasteners in
each side. Remove each grille by turning the cam-lock studs counter-clockwise, and pulling the grille outward.
Dry cleaning solvent (Fed. Spec P-D-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 grilles by agitating indetergent solution or dry cleaning solvent (Fed Spec PD-680). Use
a soft brush if necessary to dislodge caked-on dirt.
d. Inspection/Repair. Inspect grilles for bent louver blades. deformed frames, or damaged blades or operating
linkage. Repair deformation by hand bending if possible. Replace grilles if blades are missing, broken or damaged
beyond repair. Inspect gasket material for hardening, permanent set, and cuts, tears or missing pieces. Replace gaskets as
directed in the following procedure:
(1) Remove as much old gasket material as possible by pulling 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 vapors 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 gasket residue, using acetone or MEK and a stiff brush.
(3) Coat the mating surfaces of the metal and the gasket with adhesive. Let both surfaces air dry until the
adhesive is tacky but will not stick to the fingers.
(4) Starting with an end, carefully attach the gasket to the metal. Press into firm contact all over.
e. Lubrication. Apply a small amount of light machine oil to the blade pivots and operating linkage. Work in,
then blot up excess oil with a cloth or paper towel.
f. Installation. Position the grilles on the front of the air conditioner. Turn the cam-lock stud fasteners
clockwise to engage them.
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