Detroit Diesel V 71 Series, Руководство оператора

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DETROIT DIESEL
Description
The V-71 engines (6, 8, 12 and 16 cylinder models)
covered by this manual have the same bore and stroke
and use many of the same parts.
All cylinder blocks are symmetrical in design thus
permitting oil cooler or starter installation on the same
side or on opposite sides of the engine, depending
upon the installation requirements. The engines are
built with right-hand or left-hand crankshaft rotation.
For example, the crankshaft in an RC engine, viewed
from the flywheel end, will rotate counterclockwise, the
oil cooler will be mounted on the right-hand side of
the engine and the starter will be on the left-hand side
of the engine (Fig. 2).
There are eight basic engine models. The letter L or R
indicates left or right-hand engine rotation as viewed
from the front of the engine. The letter A, B, C or D
designates the location of the starter and oil cooler as
viewed from the rear (flywheel) end. For the meaning
of each digit in the model numbering system, refer to
Fig. 2.
The engines are normally equipped with an oil cooler,
lubricating oil filter(s), fuel oil strainer, fuel oil filter,
air cleaner(s) or silencer(s), governor, heat exchanger
a n d r a w w a t e r p u m p o r f a n a n d r a d i a t o r , a n d a
starter.
Fuel is drawn from the supply tank and through a
strainer by a gear-type fuel pump, then it is forced
through the filter and the fuel inlet manifolds in the
cylinder heads to the injectors. Excess fuel is returned
to the supply tank via the return fuel manifolds and
connecting lines. Since fuel is constantly circulating
through the injectors, it serves to cool the injectors and
carry off any air in the fuel system.
Air for scavenging and combustion is supplied by a
blower(s) which pumps air into the engine cylinders
via the air box and cylinder liner ports. All air
entering the blower(s) first passes through an air
cleaner or silencer.
Full pressure lubrication is supplied to all main,
connecting rod and camshaft bearings, and to other
moving parts of the engine. A gear-type pump draws
oil from the oil pan through an intake screen and
delivers it to the oil filter(s) and then to the oil
cooler(s). From the oil cooler(s) 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 parts.
C o o l a n t i s c i r c u l a t e d t h r o u g h t h e e n g i n e b y a
centrifugal type water pump. Heat is removed from
the coolant, which circulates in a closed system, by
either a radiator or heat exchanger. Control of the
engine temperature is accomplished by thermostats
that regulate the flow of the coolant within the cooling
system.
Engine starting is provided by either a hydraulic or an
electrical starting system.
Engine speed is controlled by a governor. Some
engines have a mechanical limiting speed governor,
some a mechanical variable speed governor, and other
e n g i n e s u s e a l i m i t i n g s p e e d o r a v a r i a b l e s p e e d
hydraulic governor. The engine application determines
which type of governor is used.
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