User Manual

ENGINE SYSTEMS
ENGINE SYSTEMS
The engine system are the following:
Fuel System
The fuel system consists of the
DDEC, fuel injectors, fuel manifolds
(integral with the cylinder head), fuel
pump, a cooling plate for the ECM
on non-automotive engines, p rim a ry
and secondary fuel filters , and the
necessary connecting fuel lines.
Lubrication System
The lubricating oil system consists of
an oil pump, oil cooler, two full-flow
oil filters, bypass valves at the oil
pump and oil filter adaptor, and
oil pressure regulator valve in the
cylinder block vertical oil gallery.
Air System
The outside air drawn into the
engine passes through the air filter
and is pulled into the turbocharger
and compressed. It then m oves to
the air-to-air charge cooler (heat
exchanger) and is cooled. Next it
flows to the intake manifold and into
the cylinders, where it m ixes with
atomized fuel from the injectors.
For optimum protection of the
engine from dust and other airborne
contaminants, servicethedrytypeair
cleaners when the maximum allowable
air restriction has been reached, or
annually, whichever occurs first.
Cooling System
A radiator/thermo-modulated fan
cooling system is used on Series 50
engines. This system has a centrifugal
type fresh water pump to circulate
coolant within the engine. Two
full-blocking type thermostats located
in a housing attached to the right side
of the cylinder head control the flow
of coolant.
Electrical System
The electrical system consists of
a starting motor, starting switch,
battery-charging alternator, s torage
batteries, and the necessary wiring.
Exhaust System
Hot exhaust gas fl owing from the
exhaust manifo ld into the exhaust r iser
is used to drive the turbocharger.
Exhaust Gas Recirculation
System
The purpose of the Exhaust Gas
Recirculation System (EGR) is to
reduce en gin e exhaust gas emissions
in accordance with EPA regulations.
46 All information subject to change without notice. (Rev. 01/04)
DDC-SVC-MAN-0058 Copyright © 2004 DETROIT DIESEL CORPORATION