6 - Technical Information
121
8
4
3
5
6
9
2
7
1
Engine lubrication system and
gas and oil vapour recirculation
Blow-by system
Gearbox thermistor
Scavenge and delivery pump
Suction screen
Pressure regulating valve
Oil fi lter cartridge
Oil pressure transmitter
Oil/water exchanger
Oil mesh fi lter
The lubrication system is of the dry sump
type, with fi xed gear pumps on the right-
hand side of the crankcase. The engine
is equipped with three scavenge pumps
and a delivery pump. The oil pump unit is
coupled to the water pump (see
page 122
)
and is driven by the crankshaft by means of
a chain.
The oil tank with suction chamber is cast in
the gearbox and has a separator equipped
with cylindrical degassing chamber in the
upper part with centrifugal cyclone effect.
The separator is fi tted with an oil fi ller plug
at the end of the fi ller neck.
The device for oil gas and vapour
recirculation is of the closed circuit type.
In the event of engine malfunctioning
with an abnormal rise in pressure, the
oil vapours coming from the heads are
conveyed to a pipe connected to the blow-
by system; from here, a part condenses and
fl ows into the oil tank underneath. The
remaining gases, thanks to the vacuum
generated by the engine, are aspirated
through the connection pipes and conveyed
to the plenum chambers.
A dedicated pipe in the system releases the
pressure that accumulates in the oil tank.
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