10.26 Special running condition: Turbocharger cut out
The engine is designed to run with all its turbochargers working. If a turbocharger stops working,
it must be repaired as soon as possible. However, if it is impossible to repair the not working
turbocharger, then the engine can still be run, even with 2 turbochargers not working. This is called
turbocharger cut out operation and it is considered a special running condition.
NOTE: If during one of the procedures mentioned in this chapter, an auxiliary blower becomes
inoperative, it will automatically be cut out thanks to the built in non-return valve.
WARNING
Running the engine under a special running condition will impact the following parameters
negatively:
•
Increase of Thermal load
•
Increase of exhaust temperature
•
Increase of torsional vibrations
•
Increase of stress on the Crankshaft
•
Reduction of engine revolutions
•
Reduction of load limit
•
occurance of surging
WARNING
Running the engine under special running conditions for more than 2-5 days can damage
the engine. If the engine is run under special running conditions for more than that, contact
the engine builder to obtain advice.
A turbocharger can be manually taken out of operation. The main reasons to do so are:
•
Heavy turbocharger vibrations
•
Bearing failure
•
Malfunction of the turbocharger
The turbocharger can be taken out of operation while keeping the vessel maneuverable. For this,
reduce the load until the turbocharger vibrations are gone.
If reducing the load doesn’t help and the turbocharger has problems running even at reduced load,
then proceed like this:
WARNING
Taking the turbocharger out of operation while keeping the vessel maneuverable should
only be done if it isn’t possible to run for an extended period with a turbocharger out of
operation.
A.) For engines with one turbocharger:
1 Stop the engine
2 Open the cover (E)
3 Lock the rotor of the faulty turbocharger (check your turbocharger manual for details)
X92-B
AA00-0000-00AAB-100A-A
Operation Manual Special running condition: Turbocharger cut out
Winterthur Gas & Diesel Ltd.
- 402 - Issue 002 2021-11
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