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Preparing the Terminals
Heating the terminal

Aviation Boatswains Mate E 3 & 2 - Aviation theories and other practices
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NOTE The zinc must be heated to a range of 950 to l,000°F for pouring. The temperature may not exceed 1,075°F. Discard zinc that has been heated above 1,075°F. Measure the temperature frequently with a portable pyrometer. Preheat the ladle prior to immersing it in the molten zinc. Clamp the wire rope vertically, below the seizing, in a vise having copper- or lead-protected jaws. The wire rope should be clamped sufficiently tight to hold the wire firmly but not so tight as to deform the lay. Attach wooden handles to each end of a length of soft steel wire that has been cleaned in the same way as the broomed-out cable and terminal. Loop this wire once around the broomed-out wires. Pull the wire to tighten the loop, and compress the broomed-out wires together. See figure 3-54, CAUTION Do NOT touch broomed-out wires with greasy rags or hands. Start the terminal on the compressed wires and slide it onto the wire rope until the bottom rests on the seizing. See figure 3-54. Reclamp the wire rope in the vise in a vertical position at a point approximately 5 inches below the seizing. Make sure the terminal is not tilted in any way. Figure 3-54.—Installing the terminal. Degrease and secure two turns of copper wire around the broomed-out wire rope, 1/2 inch beyond the top of the screw-type terminal or 1/8 inch beyond the grip area of a basket-type terminal. Draw the broomed-out wires inward and away from contact with the terminal so that there is approximately 1/1 6-inch clearance between the wire and the inner wall or the terminal. Wet a roll of plaster of paris bandage in lukewarm water and squeeze out the excess water. Wrap the plaster of paris bandage around the base of the terminal at a distance of about 4 inches. Press the bandage firmly to the contour of the terminal and wire rope. (See fig. 3-55.) Dampen a textile cloth with water and wrap it around the plaster of paris and secure it with seizing wire. The textile cloth may extend far enough to protect the wire rope from the torch while the terminal is being heated. the on Heat the terminal carefully and uniformly with torch, making certain the flame is not directed the exposed wire rope at the bottom of the Figure 3-55.—Textile cloth applied to the terminal. 3-57







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