The two-cycle diesel engines covered in this manual
bearings, connecting rod bearings, and camshaft
have the same bore and stroke and many of the major
bearings, and to other moving parts.
working parts such as injectors, pistons, connecting
Oil is drawn by suction from the oil pan through the
rods, cylinder liners and other parts are
intake screen and pipe to the oil pump where it is
pressurized and delivered to the oil filter and the oil
cooler. From the oil cooler, the oil enters oil galleries
The In-line engines, including the inclined marine
i n the cylinder block and cylinder head for
models, include standard accessories such as the
distribution to the main bearings, connecting rod
blower, water pump, governor and fuel pump, which,
bearings, camshaft bearings, rocker arm mechanism
on some models, may be located on either side of the
and other functional parts.
engine regardless of the direction the crankshaft
rotates. Further flexibility in meeting installation
The cooling system has a centrifugal water pump
requirements is achieved with the cylinder head which
which circulates the engine coolant through the oil
can be installed to accommodate the exhaust manifold
cooler and water jackets. The engine temperature is
on either side of the engine.
regulated by a thermostat(s).
The V-type engine uses many In-line engine parts,
Fuel is drawn from the supply tank through the fuel
including the 3-53 cylinder head. The blower is
strainer and enters a gear type fuel pump at the inlet
mounted on top of the engine between the two banks
side. Upon leaving the pump under pressure, the fuel
of cylinders and is driven by the gear train. The
is forced through the fuel filter into the inlet manifold
governor is mounted on the rear end of the 6V-53
where it passes through fuel pipes into the inlet side of
the fuel injectors. The fuel is filtered through elements
in the injectors and then atomized through small spray
The meaning of each digit in the model numbering
tip orifices into the combustion chamber. Excess fuel is
system is shown in Figs. 2 and 3. The letter L or R
returned to the fuel tank through the fuel outlet
indicates left or right-hand engine rotation as viewed
galleries and connecting lines.
from the front of the engine. The letter A,B,C or D
designates the blower and exhaust manifold location
Air for scavenging and combustion is supplied by a
on the In-line engines as viewed from the rear of the
blower which pumps air into the engine cylinders via
engine while the letter A or C designates the location
the air box and cylinder liner ports. All air entering
of the oil cooler and starter on the 6V-53 engine.
the blower first passes through an air cleaner or air
Each engine is equipped with an oil cooler, replaceable
element type lubricating oil filter, fuel oil strainer, fuel
The engine may be started by either a hydraulic or an
oil filter, an air cleaner or air silencer, a governor, a
electric starting system.
heat exchanger and raw water pump or a fan and
radiator, and a starting motor.
The engine speed is regulated by a mechanical or
hydraulic type engine governor, depending upon the
Full pressure lubrication is supplied to all main