Doosan GV158TIC, Operation & Maintenance Manual

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Disassembly and Reassembly of Major Components - 99 -
d) Stability too high, long time to settle to rated speed (over damped)
15)If idle dynamics were selected on initial start-up, it will now be necessary to set rated dynamics.
Load the engine, then select rated dynamics.
16)Engine response will change as the engine warms up. It may be necessary to tune dynamics after
warm-up. It may be necessary to compromise optimum control dynamics with a cold engine in order
to have optimum dynamics when the engine is at operating temperature.
17)The START FUEL LIMIT was set at a point that allowed the cold engine to start during initial start up
procedures. If START FUEL LIMIT is to be used, it should now be adjusted after engine stability
and response rates are correctly adjusted.
(a) Adjusting the START FUEL LIMIT counterclockwise will prevent the fuel valve from delivering a
maximum amount of fuel to the injectors until the selected speed (Idle or Rated) is reached.
Adjust for desired engine performance during start up. The Start Fuel Limit must be set high
enough to allow the engine to reach the selected speed.
(b) The START FUEL LIMIT should be adjusted from counterclockwise to obtain the desired charac-
teristics while starting the engine. There may be differences in startup characteristics of cold and
hot engines.
EE3OM055
Setting
Time
Speed