Scania DC11 - Page 137

01:03-02
©
Scania CV AB 2011, Sweden
137
Foreign bodies
Foreign particles, e.g. grains of sand or metal
particles, in the turbine or the compressor will
ruin the vanes of the wheel. This will lead to
imbalance and bearing wear. The power output
of the engine decreases, and if the engine is
still running the reduced air supply may cause
overheating and engine damage. This type of
overheating is not visible on the coolant
temperature gauge.
IMPORTANT! Never attempt to straighten a
damaged vane. It is then often broken during
operation causing the turbocharger to break
down completely, which also can damage the
engine.
Air and exhaust leaks
Even small leaks in the line between the air
cleaner and the turbocharger will cause dirt to
be deposited on the compressor impeller. The
charge pressure will be reduced, resulting in
increased exhaust temperature and smoke,
which will reduce the service life of the engine.
Leaks in the exhaust pipe between the cylinder
head and the turbocharger will also result in
loss of charging pressure.
Measuring the charging pressure
Measure the charging pressure using Scania
Diagnos 2.
Tools for Scania Diagnos
SCANIA
Diagnos
00_1521
Cleaning
Low charging pressure could be caused by a
dirty compressor impeller. Remove the
compressor cover. Clean the compressor
impeller with white spirit and a brush. Fit the
compressor cover and measure the charging
pressure again.
Turbocharger
www.motodiesel.ir
MASHINESOFT.COM
09120146259