Turbocharger; Turbo Service - Nanni N4.65 Operator's Manual

S08 MAINTENANCE

TURBOCHARGER

CAUTION !
A turbocharger is an exhaust-driven mechanical device
that boost engine power by pumping more air into the
engine. A turbocharger uses a pair of fan-like castings
mounted on a common shaft. One (called the turbine) is
piped to the exhaust, while the other (the compressor)
is piped to the engine intake. The flow of exhaust spins
the turbine, which causes the compressor to turn. The
compressor serves to blow air into the engine at a
greater rate than it can pull it in on its own. The greater
volume of air can be mixed with a greater volume of fuel,
which increases the power output.
Principle of operation (intercooler not on all models)

TURBO SERVICE

An engine turbocharger is designed to provide long
years of trouble free service, which if required, can
only be performed by a specialized workshop. In view
to maintain turbocharger performances for as long as
possible, some basic rules must be followed.
Changing or cleaning the air filter on a regular basis is a
good way to keep debris from causing problems with the
intake side of turbochargers.
A turbocharged engine will definitely need more oil
changes than an ordinary atmospheric one, as the
turbines axle requires excellent lubrication. For this
reason, oil characteristics must be followed closely.
Never use low grade bargain lubrication oil.
Turbochargers get very hot when engine is running and
a protective metal shield or thermal sleeve is always
affixed onto the exhaust side to prevent burns. Never
remove these shields.
Do not get confused : a turbocharger is driven by the
flux of exhaust gases. On a supercharger, the air intake
turbine is driven through the intermediate of a belt. In
addition to a rotation speed far lower compared to a
turbocharger, an amount of output power is subtracted
fom the engine because of the belt drive system.
There is no serviceable part for the end user
inside a turbocharger. Any attempt to
disassembling would lead to a total failure.
57