TM 9-4120-403-14
(4)
Torque two setscrews to 82 inch-pounds.
Follow-on procedures:
(1)
Install condenser air discharge guard. (See para 4-21.)
(2)
4-47. ELECTRICAL WIRING REPAIR GENERAL
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 connection. 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 MIL-F-14256, rosin base flux, item 22,
Appendix E, and should be
brushed onto the joint before soldering. If a
flux-core solder is
used, it
should be a
rosin-core
electrical solder. If an uncored solder is used, it should be a lead-tin solder, item 21, 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.
b. Insulating joints. The preferred method of insulating electrical joints is by the use of heat-shrink tubing. To
apply, 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 (13 mm) 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.
c. Splicing wires. To repair broken or cut wires that are otherwise sound, the mating ends can be stripped and
spliced. A commercial butt splice can be crimped onto the end to join them, or a "Western Union" wire splice can be
made. The latter is made by stripping 1/4 1/2 inch (0.6 13 mm) of insulation from the wire ends, holding the ends parallel
and facing opposite directions, then twisting each end around the other wire at least three turns. Solder and apply
insulation as described above.
d. Crimping terminals. To install a terminal on the end of a wire, strip 1/4 1/2 inch (0.6 13 mm) of insulation from
the end of the wire, apply a one-inch piece of heat-shrink tubing (if the terminals are of the uninsulated type), and insert
wire end into the shank of the terminal. Crimp the shank, and install heat-shrink tubing, if necessary.
4-109