Differences In Operating Parameters Of Engines And Gearboxes - Man D2868 LE433 Operating Instructions Manual

Commissioning and operation

Differences in operating parameters of engines and gearboxes

Differences in parameters can be observed on identical engines, irrespective if they are installed in one
boat or in different boats (boat series), such as
D pressures
D temperatures
D speeds
D fuel consumption
D injection quantity
D Load
D relative load
D control head signal
D oil level of engine and gearbox
D engine coolant level
D battery and charging voltage
The same applies to a single V-engine (e.g. exhaust temperatures before turbine, l.h. and r.h. side cylinder
banks).
These differences may be caused by
D component tolerances of the mechanical and electrical engine components
D design-related influences on engines (this applies especially to the exhaust temp.)
D external influences such as fuel supply, air supply and coolant supply
D installation conditions, hull characteristic and flow, exhaust system
D differences in the propeller and stern gear.
Under normal conditions this does not have any negative impact on the engine's operating safety. If the op­
erating parameters are in an impermissible range, this is indicated by appropriate alarms of the diagnostic
system.
The same applies to the gearbox parameters.Please note that especially differences in the oil temperature
may arise on gearboxes running in clockwise or anticlockwise direction.
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