1TM 9-2320-269-20-1
TAGGING PARTS - CONTINUED
Identify electrical wires with number of terminal or wire to which it connects whenever possible, to avoid confusion. If no
markings can be found, tag both wires or wire and terminal, and use the same identifying mark for both. If you cannot tag a
wire because it must fit through a small hole or you cannot reach it, write down a description of the wire and the point to
which it connects, and draw a simple diagram on paper. Be sure to write down enough information so you will be able to
connect wires properly during assembly.
If you need to identify a loose wire, look for identifying numbers near the end of the wire, stamped on a permanent metal
tag. Compare this number to the wire numbers on the electrical systems functional diagrams (appendix E).
Identify hydraulic, fuel, coolant, and oil lines whenever you are taking off more than one line at the same time. Mark tags
with the points to which lines and hoses must be connected. If it is not obvious which end of a line goes where, tag each
end of the line. Identify other parts as necessary by name and installed location.
SOLDERING
CAUTION
Use a low-wattage soldering iron when soldering electrical wires, connectors, terminal lugs, and receptacles. A high-
wattage soldering iron may damage parts by overheating them.
Solder connections must be bright and clean before soldering. Take off dirt and grease with cleaning compound (item 8,
appendix C) and small stiff fiber brush (item 4, appendix C). Solder must be non-acid type (item 27, appendix C). Use
rosin flux (item 15, appendix C). All wires, parts, and soldering iron must be pre-tinned for good connections and maximum
transfer of heat.
To prevent overheating damage to electrical parts when soldering and unsoldering connections, hold bare wire, lead, or
terminal lug close to soldering point with long round-nose pliers. Pliers act as a heat sink, absorbing excess heat.
Clean all solder joints with an acid swabbing brush and cleaning compound after soldering to get a bright clean surface.
HEAT SHRINKABLE TUBING
Heat shrinkable tubing (item 33, appendix C) is used to insulate soldered and crimped electrical connections as follows:
1.
Cut desired length of new tubing twice the diameter of the connection to be covered.
2.
Slide tubing onto wire and out of the way before making connection.
3.
After making electrical connections, slide tubing into place over it.
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