GENERAL WIRING REPAIR

TM 5-4930-233-14

TM 4930-14/1

Make certain components are initially greased or filled with oil, so that there is no chance for

damage prior to scheduled service of the component. If lubrication is not practical, you should

tie a warning tag on the equipment indicating unit has been drained and must be serviced

before operation.

4-10.

GENERAL WIRING REPAIR

Preferred repair methods consists 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 the

"Wire List" and the wiring diagram included with each electrical wiring harness maintenance procedure.

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 M IL-F-14256, rosin base flux (Item 7, 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, is should be a lead-tin

solder, (Item 16, 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 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, cut a piece of heat-shrink tubing of suitable diameter to a length of 1

inch (2.5 cm) for covering joints at terminals or connectors, or to a length about inch (1.3

cm) longer than the joint to be insulated. 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.

4-15