Emergency operation
With a defective turbocharger
A3.12.01.02
M20-M601C
en / 16.12.1997 BA000256 2/2
Ĺ
Monitoring the engine while the turbocharger is defective
Change the fuel rack position gradually until the
exhaust gas temperature after the turbine is a maximum 500 °C
Carefully monitor the exhaust gas temperatures during emergency operation, especially if exhaust
gas alarms have been cut out.
Charge air temperature while the turbocharger is defective
Note:
If the charge air cooler has two stages, the charge air temperature is raised at part load by
isolating the low-temperature circuit of the cooler, which is controlled by charge air
pressure.
Because of the turbocharger failure, however, the charge air temperature should be low, but not
lower than 30 °C.
If the charge air cooler is of the two-stage type, the low-temperature circuit must therefore be
opened by hand.
Finishing with emergency operation
After an emergency operation with heavy fuel, at least one cylinder head must be removed for
reasons of safety and to ascertain as to whether a general overhaul of the valves is necessary.
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