Technical Information; Engine General Description - VM Motori D703E2 Manual De Instrucciones

ENGINE GENERAL DESCRIPTION

Engines of series D700 - D750 (D703-
GB
D753-D704-D754-D706-D756) have
been designed and manufactured to be
installed and equipped "for stationary use"
(for example on power generating units),
or "for selfpropelled use" (for example on
earth-moving tractors).
Main components
A) Cooler: cools the engine oil by heat
exchange with the coolant fluid.
B) Turbo device: Made up of a turbine
which exploits a part of the exhaust gas
energy to carry out the engine turbochar-
ging.
C) Injector: injects pressurised fuel into
the combustion chamber.
D) "waste-gate" valve: It controls the turbo
device activation, depending on the pres-
sure of the exhaust gases.
E) Heat expansion valve: It adjusts the
water temperature according to the engi-
ne working temperature
F) Fuel filter: It traps any impurity
G) Oil filter: It traps any impurity
H) Oil sump: It contains the engine lubri-
cation oil
L) Suction manifold: conveys the combu-
stion air into the combustion chamber.
M) Water pump: feeds the cooling circuit
N) Transmission belt: It drives the service
parts
P) Injection pump: It feeds the injectors
with fuel under pressure
English

TECHNICAL INFORMATION

The various models in the D700-D750
engine series are differentiated by their
power and performance (See "Technical
data").
Engines of model D703 (3 cylinders)
are equipped with a single injection
pump per cylinder, while models D753-
D704- D754-D706-D756 (3-4-6 cylin-
ders) are equipped with a mechanical
rotating injection pump.
Q) Alternating current generator: It pro-
duces and regulates the electric system
voltage
R) Starter: It is used to start the engine
S) Exhaust manifold: It is used to expel
the combustion gases
T) Water manifold: It is used to collect the
coolant from the heads
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D700-750E2_E3
VM p/n 42432097F Ed.4 - 2015-05