ABB TPL85-B14 Operation Manual page 66

Principle of wet cleaning
CAUTION
Principle of dry cleaning
NOTICE
CAUTION
Cleaning more than one
turbocharger turbine
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Maintenance
Cleaning turbine blades and nozzle ring
in operation
During wet cleaning using droplets of water, the water does not act as a
solvent. Instead, the deposit is removed by the mechanical impact of the
drops.
Corrosion and deposits when cleaning
Damage and impairment of turbocharger parts due to salt water and
cooling water additives
Don't use salt water for cleaning, but only clean fresh water.

When dry cleaning using dry solid matter in granulate form, dirty deposits
are removed mechanically by the grains impacting the surface.
Wet and dry cleaning are equally effective. However, it may be useful to
apply both methods together.
Components at the turbine end are not cleaned until the engine has been
started or the engine load reduced. The exhaust gas temperature must
not exceed the value specified in the respective cleaning instructions (see
section PrerequisitesTPL-A/-C: Operating state prerequisites for wet
cleaning turbine and nozzle ring).
Exhaust gas temperature, stabilising and drying time
Drastically reduced lifetime of component due to excessive inlet tem-
perature and varying temperature stresses in the component.
Always adhere to the respective cleaning instructions.

If several turbochargers are installed on one engine, we recommend
cleaning one turbocharger turbine with nozzle ring after the other.
Operation Manual / TPL85-B14/-B15/-B16
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5.5 Page 64