Seawater valves control flow of seawater to SAG 1 for cooling engine coolant and lubricating oil. These
valves must be open for engine to operate.
Seawater valve SW37. Located in void 4 port next to seawater strainer. When open, provides
water from seawater strainer to manifold piping, which provides cooling seawater to all generators
in void 4.
Seawater valve SW49. Located in void 4 starboard on starboard bulkhead. When open,
provides outlet for used cooling water to flow overboard.
Seawater valve SW42. Controls flow of cooling seawater from aft seawater seachest strainer to
inlet into engine cooling exchanger. Valve piping also includes a temperature gauge indicating
inlet water temperature. Valve must be open for engine to operate.
Seawater valve SW43. Controls flow of cooling seawater from engine cooling exchanger to
overboard outlet. Valve piping also includes a temperature gauge indicating temperature of water
leaving the engine heat exchanger (Barges 2 and 3 only). Valve must be open for engine to
3-25.1.2 SC144E generator. Controls and indicators are on switchboard in ROWPU space. These are discussed in
Section II, paragraph 3-7.1.2, as part of the primary electrical system.
3-25.2 Prestart procedures
In ROWPU space, make sure EMS (TM 55-1930-209-14&P-11) is operating by pushing up on monitor
controller left of monitoring processor. If video monitor screen does not come on, turn it on with switch
beneath the screen. For more details on EMS, see TM 55-1930-209-14&P-11.
Check maintenance records to make sure all required maintenance checks and services have been
completed and no deficiencies exist that would prevent safe and proper equipment operation.
In void 4 starboard, inspect generator set for visible deficiencies that, if not corrected, could become
hazardous to people or equipment.
Never overfill crankcase. Fill only to maximum level as indicated on dipstick.
Check crankcase engine oil level on dipstick on left side of engine. If not up to full mark, add lubricating
oil through filler on top of engine. Use SAE 15W40 that meets Military Specification MIL-L-2104 (API
"CD"). If temperature in the voids consistently exceeds 120F, use SAE 40.
Check coolant level in heat exchanger (header) tank. Level should be less than 1 inch below bottom of
neck opening. If necessary, add clean fresh water to bring to required level. Cooling system has an
anticorrosion zinc anode in coolant heat exchanger. Water conditioner, therefore, is not required or
Check that seawater is available for heat exchanger.
Make sure both stem seawater strainer baskets are dean and operable. For details on servicing
these strainers, see TM 55-1930-209-14&P-2, Seawater System.
Open seawater valves SW45 and SW46 (on Barges 2 and 3 only) to monitor pressure drop
across strainers. If pressure difference during operation becomes greater than 8 in. Hg, turn
handle to direct water through other basket. Clean dirty basket (TM 55-1930-209-14&P-2),
Open seawater valve SW37 in void 4 port and SW42, SW43, and SW49 in void 4 starboard.
Check that fuel oil is available by setting fuel oil valves as follows:
Open: FO18, FO19, and FO25
Close: FO13 thru FO17, FO20 thru FO24, FO26, and FO27. *