Full pressure lubrication is supplied to all main, connecting rod, and camshaft bearings, and to other moving parts
within the engine. A gear-type pump located on the front end of the engine behind the vibration dampener, draws
oil from the oil sump located on the bottom of the engine through an intake screen. It is then pumped through the
oil filter located remotely on the starboard bulkhead and then to the oil cooler located on the starboard side of the
engine. From the oil cooler, the oil flows through passages that connect with the oil galleries in the cylinder block
and cylinder heads for distribution to the bearings, rocker arm mechanism, and other functional internal parts. The
oil level is checked through a dipstick on the port side of the engine and is filled through oil filler cap on the
starboard valve cover. The oil pressure is regulated by an oil pressure regulator located on the bottom side of the
engine inside the oil sump. The engine is protected from excessive oil pressure by an oil pressure relief valve also
located on the bottom side of the engine in the oil sump.
Engine starting is provided by an electric starting system. The electric starting motor, located port side of the
engine, is energized by a storage battery. A battery-charging alternator, located port side forward corner of the
engine, serves to keep the storage battery charged. The battery-charging alternator is driven by a pulley mounted
on the vibration dampener, which is located on the forward end of the engine on the end of the crankshaft. An
emergency stop solenoid, located on the aft end of the air inlet housing, activates a flapper in the air inlet housing
when the air supply to the engine needs to be shut down.
Engine Governing System
Engine speed is controlled by a governor system. The governor system consists of a speed controller located in
the engine junction box A4 aft of the engine, a governor actuator located on top of the engine and a magnetic
pick-up located on the aft end of the engine on the flywheel housing.
The engine is protected from over speed by an over-speed governor. The over-speed governor consists of an
electronic speed switch located on the lower starboard side of the engine, a dual function signal generator which
is located aft of the blower. The dual function signal generator transmits engine RPMs to both the over-speed
The air induction system begins with two paper type air filters located on top of the engine in front of the
turbochargers and two air limiters located inboard of each valve cover on top of the engine. Two large volume
water-cooled turbochargers are located on the aft end both port and starboard sides of the engine. The air inlet
housing mounted top center of the engine can shut off all air to the engine, shutting it down in an emergency
situation. The engine blower located top center beneath the air intake housing maintains a constant pressure in
the air box to maintain an efficient scavenging process. Located directly beneath the blower is an after cooler,
which is a small radiator designed to cool and condense the air prior to entering the air box.