OP-755 Part 2 Pages 197-401 - Personal Page of GENE SLOVER

364
INSTALLATION
2. A new hydraulic unit when delivered from the Naval
Gun Factory spares or from the manufacturer has all openings
into the system closed with wooden or metal shipping covers
or plugs. These must be retained in place until immed iate Zy
pr i or to connec t ion with their complementary parts of the system.
Such connections may be made only when all dirty work
on or adjacent to the mount has ceased and when the air is
free of dust, fumes which may condense, or any other foreign
matter which may foul freshly opened leads. The maximumpossi
ble effort must be exerted to prevent entrance of foreign
matter.
3. Similarly, when an overhauled, reassembled unit is
installed in the mount every precaution must be taken to ex:clude
foreign matter from the system. Such unit before mounting
should be flushed clean, air dried and all openings should
be appropriately c/losed until immediately prior to cormection
to the complementary parts of the system.
4. If when installing a unit, special fitting of pipe
connection is necessary at an e xposed , unsealed port, exercise
ex:treme care to prevent entrance of metal slivers, filings or
dus t;.thoroughly inspect the seat and the opening before closing
the port. When drilling, tapping, welding or soldering
is being performed on or near, the equipment keep all openings
closed or covered. .
5. New pipe is shipped with metal disc or other plug
insert to exclude dirt. It has been factory inspected and although
presumably clean must be recleaned before assembly in
the system. Such cleaning is performed as follows:
(a) Copper pipe. -
(1) Treat machined faces or threads of end fittings
with not paraffin wax.
(2) Dip, and remove immediately, in acid bath
solution of 2 parts sulphuric acid, 1 part
nitric acid and 4 parts fresh water.
(3)
(4)
Wash in fresh cold water.
Immerse for one minute in a neutralizing
bato. of 1-1/2 pounds of Magnus #2-1/2 per
gallon of fresh water.
(5) Soak in boiling water for 10 minutes.