TM9-4120-370-14
TO35E9-229-1
4-35. Fresh Air Damper - Continued,
f.
Installation
(1)
Using screwdriver and wrench, secure bracket to casing with four screws, flat washers, and nuts. (See
Reinstall grommet in rear of casing, if it was removed or missing.
(2)
Install knob on rod end if it was removed.
(3)
Insert rod through grommet in rear of casing and through the first hole in the bracket.
(4)
Install spring washers, flat washers, and worm gear and insert rod through the remaining bracket hole. (See
(5)
Aline holes in worm gear and rod and install spring pin.
(6)
(7)
Slip extension rod onto end of rod,
Aline setscrew with flat on end of rod and tighten setscrew with allen wrench.
(8)
Aline condenser motor channel support mounting holes with casing holes.
(9)
(10) Using wrench secure condenser motor channel support with eight cap screws. (See Figure 4-44.)
(11) Using two wrenches install spacers, spring washers, and gear arm assembly with cap screw, flat washer,
and nut. (See Figure 4-43.)
(12) Using two wrenches, secure link arm to gear arm assembly with a cap screw, spacer, flat washer, and nut,
(See Figure 4-42.)
(13) Using screwdriver, secure damper door hinges to casing with eight screws. (See Figure 4-42.)
(14) Using two wrenches, connect link arm to bracket on damper door with a cap screw, spacer, flat washer,
and nut.
Follow-on procedures: 1. Install actuating cylinder access cover. (See para 4-20.)
2. Install fresh air filter and frame. (See para 436.)
3. Install conditioned air filter. (See para 4-37.)
4. Install conditioned air intake grille. (See para 435.)
Preferred repair methods consist of replacing wires, terminals, connectors, etc., rather than splicing wires, bending ends
to form terminals, and other make shift procedures; although the latter may be appropriate for emergency field repairs.
Determine the proper size and length of wire, or the terminal, or connector to be used for replacement by referring to
a. Soldering connections. Wire connections must be made mechanically sound before they are soldered; solder
alone does not provide sufficient strength to prevent breakage. Joining surfaces of connections to be soldered
must be clean and bright. If a separate flux is used, it should conform to Specification Ml L-F-l 4256 rosin base
flux, item 16, Appendix E and should be brushed onto the joint before soldering. If a flux-core solder is used,
it should always be rosin-core electrical solder. If an uncored solder is used, it should be a lead-tin solder, item
3, Appendix E, conforming to Specification QQ-S-571. Wires should always be heated to the point at which
the solder will melt completely and flow into all parts of the joint. Excessive build-up of solder "gobs" on the joint
should be avoided or removed.
Insulating joints. The preferred method of insulating electrical joints is by the use of heat-shrink tubing. To apply,
b.
cut a piece of heat-shrink tubing of suitable diameter to a one-inch length for covering joints at terminals or
connectors, or to a length about 1/2 inch (1.3 cm) longer than the joint to be insulated, and slide the tubing over
the wire before making the joint. After the joint is made, slide the tubing so that it covers the joint, and shrink
in place with moderate heat.