TM 9-2330-390-14&P
4-18. TAGGING WIRES AND HOSES.
a.
Use marker tags (Item 28, Appendix F) to identify all electrical wires and all air, hydraulic, fuel, and oil
hoses and lines, and any other parts which may be hard to identify or replace later. Fasten tags to parts during removal
by wrapping wire fasteners around or through parts and twisting ends together. Position tags to be out of the way
during cleaning, inspection, and repair. Mark tags with a pencil, pen, or marker.
b.
Whenever possible, identify electrical wires with the number of the terminal or wire to which it connects.
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 the description of the wire
and the point to which it connects or draw a simple diagram on paper. Be sure to write down enough information so
you will be able to properly connect the wires 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 wire numbers on the
appropriate electrical schematic.
c.
Identify air, hydraulic, fuel, and oil hoses and lines when you are taking off more than one line at the same
time. Mark tags with 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.
d.
Identify and tag other parts as required by name and installed location.
4-19. SOLDERING.
a.
Solder connection must be bright and clean before soldering. Remove dirt and grease with a wire brush
(Item 4, Appendix F) or a pocket knife (Item 30, Appendix G). Solder used must be of lead alloy (Item 26, Appendix F)
with soldering flux (Item 16, Appendix F). All wires, parts, and soldering gun (Item 25, Appendix G) must be tinned for
good connection and maximum transfer of heat.
b.
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 roundnose pliers (Item 30, Appendix G). Pliers act as
heat sink and absorb excess heat.
4-20.
HEAT SHRINKABLE TUBING.
Use heat shrinkable tubing (Item 20, Appendix F) to insulate soldered and crimped electrical connections
as follows:
(1)
Cut length of new heat shrinkable tubing twice the length of the connection to be covered.
(2)
Slide the heat shrinkable tubing onto the wire and out of the way before making electrical
connection.
(3) After making electrical connection, slide heat shrinkable tubing into place over electrical
connection.
DO NOT touch heat shrinkable tubing for at least 30 seconds after heating. Heat
shrinkable tubing is hot and will burn you.
(4)
Hold air blow gun (Item 14, Appendix G) 4-5 in. (10.2-12.7 cm) away from heat shrinkable tubing
and apply heat for approximately 30 seconds. Stop applying heat as soon as heat shrinkable tubing forms to the
shape of the electrical connection.
4-11
