Karcher HD 19-100 De Tr1 - Manual (Page 54)

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English Technical information
GB
R750
Model R754 EU4 - R756 EU4 engines have
been designed and built to be installed in
on-road vehicles such as sweepers, trucks
etc., as they comply with EURO 4 anti-pollu-
tion requirements.
Model R754 IE3 - R756 IE3 engines have
been designed for off-road use, fitted in ag-
ricultural machinery or load lifting machines.
The models of engine differ from each other in
both power and performance (see "Specifica-
tions")
A few accessories are supplied with the en-
gine.
Main components
A) Cooler: cools the engine oil by heat ex-
change 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 turbo-
charging.
C) "EGR" valve: modulates the recircula-
tion of exhaust gasses before they flow
into the suction manifold.
D) "Waste-gate" valve: it controls the tur-
bo device activation, depending on the
pressure of the exhaust gases.
E) Heat expansion valve: it adjusts the
water temperature according to the en-
gine working temperature
F) Fuel filter: it traps any impurity
G) Oil filter: it traps any impurity
H) Oil sump: it contains the engine lubrica-
tion oil
L) Suction manifold: conveys the com-
bustion air into the combustion chamber.
M) Water pump: feeds the cooling circuit
N) Drive belt type Poly-V (only for en-
gines model R754EU4 - R756EU4):
drives the service organs, the alternator
(Q) and the water pump (M).
P) Automatic belt tensioner (only for en-
gines model R754EU4 - R756EU4):
keeps the belt taught at all times.
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
U) High pressure injection pump: it feeds
the injectors with fuel under pressure
V) Injector: injects pressurised fuel into the
combustion chamber.
W) Antiparticulate filter: this is installed in
the engine exhaust pipe conduit. It
serves to retain solid particles (PM10
fine dust particles) so as to reduce the
emissions from diesel engines, which
are responsible for atmospheric pollu-
tion.
Z) Rail: stores pressurised fuel and distrib-
utes it to the injectors.
TECHNICAL INFORMATION
ENGINE GENERAL DESCRIPTION