Modification A00064 - US Coast Guard Response Boat-Medium

USCG Response Boat – Medium (RB-M)
HSCG23-06-D-ARB001
233-4 [Orig] Crankcase Fumes
233-4.1 [A00064] An oil mist separator system utilizing centrifugal separation
technology shall be provided with each engine to collect all oil mist and oil fumes
generated and return it to the oil sump. The clean blow-by gases shall be
dissipated through each engine’s air intake.
233-5 [Orig] Engine Cooling System
233-5.1 [Orig] Engine jacket water shall be cooled with raw water through an inboard heatexchanger
system.
233-5.1.1 [A00047] Raw water shall be strained through a duplex-type strainer fabricated
from 70/30 copper nickel material with bronze valves. The strainers shall have
the provision to clean one bowl, while operating the engine on the adjacent
bowl. Strainer bowls shall be clear to allow for visual inspection. The basket
shall be removable from the top of the strainer, without dismantling the strainer
or disconnecting the piping. Access to the basket shall be via a quick access
and all retaining mechanisms shall be captured to the strainer to prevent loss.
233-5.1.2 [A00047] Each engine shall have separate sea suctions, and shall be fitted
with bronze ball type seacocks.
233-5.2 [Orig] Raw water systems shall have vents and drains so that the system can be
completely drained, flushed and completely winterized without disassembling
piping system joints.
233-5.3 [Orig] Engine components, except charge air aftercoolers and fuel coolers, shall
be cooled with jacket water. The jacket water shall meet the requirements on
COMDTINST M9000.6E, Naval Engineering Manual, Chapter 233. Jacket water
may be used as a heat source for cabin heating.
233-6 [Orig] Emergency Shut Down
233-6.1 [Orig] Each engine shall be provided with an emergency shut down control to
activate an emergency shutoff for the fuel or air supply. The emergency shut down
device shall be of the type which requires manual resetting before the engine can
be restarted. It shall be operated remotely from the pilothouse. The actuator for
the port engine shall be placed to the port side of the corresponding actuator for
the starboard engine.
233-7 [Orig] Jacket Water Heating System
233-7.1 [Orig] Engine jacket water shall be heated to provide for rapid starting in colder
climates. The jacket water heating system shall be powered by shore power only.
The jacket water heating system shall be thermostatically controlled to heat the
jacket water to a minimum temperature of 90 degrees Fahrenheit when the outside
air temperature is at zero degrees Fahrenheit. The temperature shall be measured
at the jacket water temperature gauge sending unit.
233-8 [Orig] Lube Oil Sample Valve
233-8.1 [Orig] Each engine shall have a lube oil sample valve installed as per
COMDTINST M9000.6E, Naval Engineering Manual, Chapter 262.C.5.
PART III, SECTION J, ATTACHMENT 2, A00064 PAGE 13 OF 22 SPECIFICATION