Preparing the Terminals
Using a degreased length of seizing wire, suspend
the terminal from the top of the ultrasonic degreaser so
it is submerged in the solution. Inspect the terminal and
repeat the procedure if necessary. Rinse the terminal in
a bucket of clean GRISOLVE PEG-2 for 30 seconds,
then let air-dry for 5 minutes.
Replace the solution in the ultrasonic degreaser
after 10 terminals have been cleaned/degreased.
Replace the rinsing solution after 10 terminals have
been rinsed or as soon as the solution becomes cloudy.
Lay the terminal in the grit blast cabinet. Plug the
cable entry hole with the rubber plug hanging from the
cabinet. Secure the doors on the side. Grit blast the
internal surfaces of the terminal from both ends. Rotate
the terminal so that the entire internal surface is blasted.
Remove the terminal, invert it, and shake it
thoroughly to remove residual grit.
To keep arresting gear crews constantly aware of
the health hazards associated with the present terminal
pouring
procedures,
safety
warning
placards,
fabricated by ship's forces, will be posted in clearly
visible locations in the arresting gear terminal pouring
rooms/area. (See fig. 3-54.)
Preparing and Pouring Zinc
Make certain to use the special high-grade zinc
ingot
(NAEC
PN323822-2),
which
comes
in
two-pound slugs. Personnel engaged in preparing
and/or pouring molten zinc must wear protective
clothing, such as goggles and gloves. A protective
screen must be provided around the pouring station.
A ladle and heating furnace are used to melt the
zinc. Use a ladle that is thoroughly dry and free from
rust, scale, slag, or any other foreign matter. Place a
minimum of five pure zinc ingots into a clean ladle.
The zinc must be heated to a range of 950 to
1,000°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 3-55. 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 3-55.
Reclamp the wire rope in the vise in a vertical
position. Make sure the terminal is not tilted in any way.
Degrease and secure two turns of copper wire
around the broomed-out wire rope, 1/2 inch beyond the
top of the terminal. Draw the broomed-out wires
inward and away from contact with the terminal so that
there is approximately 1/16-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.
3-56.) Dampen a textile cloth with water and wrap it
3-53
APPROX.
3 INCHES
APPROX.
4 INCHES
SEIZING WIRE
RIPCORD
DAMPENED TEXTILE
CLOTH
SEIZING WIRE
ABEf0356
Figure 3-56.—Textile cloth applied to the terminal.
