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 mandrel for regrounding the fitting has been developed and tested. A photo-
graph showing its use is in Figure 11-1. Also, a shop drawing for the
manufacture of the mandrel is presented in Appendix C. It is recommended
that the mandrel be carried on the hose transfer vehicle, as its most emer-
gent use occurs when a ship-to-shore operation is in process. The fittings
can be regrounded within a few minutes, to permit a smooth connection
operation.
It is recommended that the operator apply a red coating to hoses in
need of repair. This will remind other operators not to use or deploy the
bad hoses. Once a hose is repaired, the red paint can be removed by acetone
or lacquer thinner.
11.2.3 INSTALLING NEW FITTINGS. To place or replace fittings on collaps-
ible or noncollapsible rubber hoses, the following steps are taken:
a. If the hose has been in use, the ends are inspected for splits,
severe compression marks, frayed areas, or any other indication of weakness;
if there is any doubt about the reliability of a hose end, it is cut off
before the fitting is attached.
b. To cut off a hose end, place the portion of the hose to be cut in
two 6-inch pipe vises set about 6 feet apart on the work bench, as shown in
Figure 11-2; when cutting off a hose end, the end of the hose to be cut is
located to the outside of the pair of vises. The cutting does not take
place between the vises.
c. The end of the hose is cut off by hand, using a 10-point carpen-
ter's saw; this method produces neat, square-cut sections on rubber hoses.
If the hose is new, steps a. through c. may be skipped.
d.
e. Have ready two l-gallon hot water baths large enough to heat the
hose end and fittings; the water temperature should be about 200 F.
f. Place the fitting to be attached in one water bath, submerging it
completely in the hot water.
g. Slip two hose clamping bands on the end of the hose to receive the
fitting, sliding the bands several feet back from the hose end; place the
end of the hose to receive the fitting in the other water bath in the verti-
cal position so that it is completely immersed in hot water to the full
depth of the fitting. Heat the hose end simultaneously with the fitting for
a period of three minutes.
h. Remove the hose fitting from the water bath and place it on the
deck with the shank facing up (caution should be used in handling the con-
nector because it will be hot).
i. Remove the hose end from the water bath, and slip the heated end of
the hose down over the shank of the heated fitting. This should require
very little effort if done properly.
11-5
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