115
Turbocompressor
General
Use is made of the engine exhaust gases to drive the
turbocompressor turbine wheel.
From
air cleaner
To exhaust
system
To intercooler
1
1
4
3
2
4
5
1
5
From exhaust manifold
Turbocompressor
Removing/installing
1.
Remove…
–
the compressed-air pipe for the exhaust pressure
governor,
–
the clamp between the shutter housing and the ex-
haust pipe,
–
the nuts for the diffusor.
2.
Lift out the shutter housing.
3.
Remove the inlet hose.
4.
Disconnect the delivery and return oil pipes from
the turbo.
5.
For DH10A, 245, 285: Disconnect the coolant con-
nections (do not disconnect the wastegate and con-
trol rod).
6.
Remove the turbocompressor from the exhaust
manifold.
The turbine wheel and compressor wheel are mounted
on the same shaft. When the compressor wheel rotates,
it sucks air in from the air cleaner, the turbocompressor
compresses it and presses it through the intercooler to
the engine. Concerning the charge pressure, refer to
“Condition test”.
The turbocompressor is lubricated and cooled by the
engine oil, on the DH10A, 245, 285, the turbo is also
cooled by coolant. Turbocompressor function is de-
pendent on oil supply. Therefore the engine lubricating
system must be well looked after.
The turbocompressor is adapted to engine type, where
the size of the turbine is of great importance.
