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TM 5-2420-222-34
1-19.
SOLDERING.
WARNING
Cleaning compound, trichlorotrifluoroethane, for electrical parts is toxic and
flammable, and reacts violently with aluminum, titanium, barium, lithium,
samarium, sodium, and potassium. Always wear protective goggles and rubber
gloves, and use only in a well-ventilated area. DO NOT wear jewelry while using
cleaning compound. Avoid contact with skin, eyes, and clothes, and DO NOT
breathe vapors. Cleaning compound fumes or vapors can take the place of air and
may become a cancer producing agent. DO NOT use near open flame or excessive
heat. The compound's boiling point is 114°F (46C). If you become dizzy while
using cleaning compound, immediately get fresh air and medical help. If
compound contacts eyes, Immediately wash your eyes with water and get medical
aid.
CAUTION
Use low-wattage soldering gun when soldering electrical wires, connectors,
terminal lugs, and receptacles. High-wattage soldering guns may damage parts by
overheating them.
a.
Solder connection must be bright and clean before soldering. Take off dirt and grease with
trichlorotrifluoroethane (Item 40, Appendix B). Solder used must be tin alloy (Item 30, Appendix B) with rosin flux (Item 16,
Appendix B). All wires, parts, and soldering gun must be pretinned 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. Pliers act as heatsink and absorb excess
heat.
WARNING
Cleaning compound, trichlorotrifluoroethane, for electrical parts Is toxic and
flammable, and reacts violently with aluminum, titanium, barium, lithium,
samarium, sodium, and potassium. Always wear protective goggles and rubber
gloves, and use only in a well-ventilated area. DO NOT wear Jewelry while using
cleaning compound. Avoid contact with skin, eyes, and clothes, and DO NOT
breathe vapors. Cleaning compound fumes or vapors can take the place of air and
may become a cancer producing agent. DO NOT use near open flame or excessive
heat. The compound's boiling point is 114°F (46C). If you become dizzy while
using cleaning compound, Immediately get fresh air and medical help. If
compound contacts eyes, Immediately wash your eyes with water and get medical
aid.
c.
Clean all solder joints with a scrub brush (Item 3, Appendix B) and electrical parts trichlorotrifluoroethane
(Item 40, Appendix B) after soldering to get a bright clean surface.
1-20.
HEAT SHRINK TUBING.
Use heat shrink tubing (Item 41, Appendix B) to insulate soldered and crimped electrical connections as follows:
(1)
Cut desired length of new tubing twice the diameter of connection to be covered.
(2)
Slide tubing onto wire and out of the way before making connection.
1-9
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