Xinchai 490B Series Manual page 21

The oil level shall be between the upper and lower marked line
2.2 Starting of the diesel engine
1冤尧 Put the speed control lever at its middle speed position.
2冤尧 Loose the vent screw on the fuel filter, press the hand fuel supply pump several
times to release the air trapped in the fuel system. For a new engine or an engine having
stood by for a long period, where a lot of air may have been existed in the fuel system, it
may be necessary to loose the vent screw on the injection pump and to press the fuel
supply pump repeatedly till all the trapped air is released. If the engine has been operated
frequently, this work may be omitted according to the actual situation.
3冤尧 Press the start button to start the engine. If it fails to start, the button should be
released and restart it after waiting for two or three minutes. If the engine still fails to
start after three consecutive attempts, the trouble cause should be found out and dealt with
accordingly before starting it again.
4冤尧 The starting button should be released immediately after starting. Watch the
speedometer and adjust the speed control lever. Run the engine at 600-850rpm idle speed
to see if the engine is working normally. Pay special attention to the oil pressure, which
should be higher than 0.05MPa. Then, speed up the engine gradually to 1800 to 2000 rpm
at idle load to warm it up.
2.3 Operation of the diesel engine
1冤尧 The engine should not take load to work until the water temperature reaches 50毅C
and oil temperature reaches 40毅C. And the rated load should not be taken until the water
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