Do not open the filter valves. The filter is
5. Remove the hose from the fuel station hose reel.
6. Commence steaming:
a. Steam the piping for 6 to 12 hours.
b. The temperature must not exceed 240°F.
c. Low-pressure air is injected with the steam
to control the temperature and assist in forcing the steam
through the piping.
d. Steam that condenses into water in the pump
suction header may be stripped into the outer tank.
7. Test the steam exhaust. (This is done by the Gas
Free Engineer, using a Combustible Gas Indicator.
8. When a negative reading is obtained, secure the
steam and allow the piping to cool.
9. Remove appositive stop valve and check for
The filter must be steamed prior to filter element
removal/replacement and maintenance. To steam the
filter, use the following procedures:
1. Remove the rotary control valve and install a
blank flange and gasket on the sump.
2. Make sure the following valves are closed:
a. Filter inlet valve.
b. Filter drain valve.
c. Filter vent valve.
3. Open all valves from the filter discharge to the
4. Connect an extension hose to the fill connection
and lower it over the side to the water line.
5. Commence steaming:
a. Steam for 6 to 12 hours.
b. Do not exceed 15 psi.
c. Condensation that accumulates in the filter
sump may be manually drained.
6. Test the steam exhaust. (This is done by the Gas
Free Engineer, using a Combustible Gas Indicator).
7. Remove a positive stop valve and inspect for
At the end of steaming, check the tightness
of all flange connections and inspect butterfly
After the tanks have been steamed and mainte-
nance completed, they must be refilled with seawater.
Seawater will be taken on in deep water where the
chance of picking up mud and silt from the bottom is
To fill the tanks with seawater, use the following
1. Make sure the overboard discharge valve is
2. If icing conditions exist, cut in the steam coil for
the overboard discharge line and vent.
3. Vent the tanks through the fill piping to the fill
connection using all bypasses.
4. Line up the seawater system by opening the
a. Sea chest valve.
b. Seawater compensating pump inlet and
c. Outer tank supply riser.
5. Start the seawater compensating pump. Seawa-
ter is now being pumped into the outer tank.
6. When seawater appears in the sight glass in the
tank fill line, close the tanktop.
7. When the seawater compensation tank sight
glass indicates the tank is full, stop the seawater com-
8. Close and lock the sea chest valve.
The catapult lube oil system and MOGAS system
are small, simple systems to operate. As stated pre-
viously, following proper procedures will ensure safe
operations. However, because of the hazards involved
when handling MOGAS, it is MANDATORY that all
safety precautions be adhered to, not just before pres-
surizing the system, but even before entering the pum-