TM 9-2330-390-14&P4-18. TAGGING WIRES AND HOSES.a.Use marker tags (Item 28, Appendix F) to identify all electrical wires and all air, hydraulic, fuel, and oilhoses and lines, and any other parts which may be hard to identify or replace later. Fasten tags to parts during removalby wrapping wire fasteners around or through parts and twisting ends together. Position tags to be out of the wayduring 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 youcannot tag a wire because it must fit through a small hole or you cannot reach it, write down the description of the wireand the point to which it connects or draw a simple diagram on paper. Be sure to write down enough information soyou will be able to properly connect the wires during assembly. If you need to identify a loose wire, look for identifyingnumbers near the end of the wire, stamped on a permanent metal tag. Compare this number to wire numbers on theappropriate electrical schematic.c.Identify air, hydraulic, fuel, and oil hoses and lines when you are taking off more than one line at the sametime. Mark tags with points to which lines and hoses must be connected. If it is not obvious which end of a line goeswhere, 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 forgood connection and maximum transfer of heat.b.To prevent overheating damage to electrical parts when soldering and unsoldering connections, holdbare wire, lead, or terminal lug close to soldering point with long roundnose pliers (Item 30, Appendix G). Pliers act asheat sink and absorb excess heat.4-20.HEAT SHRINKABLE TUBING.Use heat shrinkable tubing (Item 20, Appendix F) to insulate soldered and crimped electrical connectionsas 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 electricalconnection.(3) After making electrical connection, slide heat shrinkable tubing into place over electricalconnection.DO NOT touch heat shrinkable tubing for at least 30 seconds after heating. Heatshrinkable 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 tubingand apply heat for approximately 30 seconds. Stop applying heat as soon as heat shrinkable tubing forms to theshape of the electrical connection.4-11
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