5.4.6. Handling 1) Precautions at engine Operation following items must be observed at the starting, operation and stop of engine. Maintenance of Major Components - 135 - Item Care Items At starting 1) Inspect oil quantity 2) After confirming that oil pressure rises by starting engine with starter (until the pointer of oil pressure gauge moves or pressure indicating lamp operates), the starting must be done.
3) In case that oil, oil filter and lubricating system’s part are replaced or engine was stalled for long time (more than a week), and in case of operation under cold weather, loosen the oil pipe connecting parts of turbocharger inlet, and operate the starting motor until oil comes out the connecting parts. Care must be paid that after the confirming above, retighten the pipe connecting parts without fail, and proceed with the normal starting. 2) If engine is started quickly, of course beginning with every parts of engine, for it revolves without oil that is to reach to the turbocharger, the bearing’s abnormal wear or stuck may be caused.
3) In case that engine stalled for long time and of cold weather, the fluidity of oil may be get worse. Immediately after starting 1) Perform idling operation for about 5 min. immediately after engine starting. 2) Various inspections must insure that there are no leakage of oil, gas and air. 1) Sudden load at time soon after engine starting and at the state when turbocharger did not yet reach to smooth revolution, if abrupt load is applied to engine, some parts where oil did still not reach may cause a burn to be stuck. 2) If there are the leakage of oil, gas, air, particularly oil, for the oil pressure lowers, it causes a burn of bearing to be stuck.
During operation Following items must be confirmed. 1) Oil pressure at Idling : 90 ~ 300 kPa (0.9 ~ 3.0 bar) at full load : 300 ~ 650 kPa (3.0 ~ 6.5 bar) 2) When abnormal noises and vibration are generated, slow down the revolution and must stop it to investigate the causes. 1) If the pressure is too low, abnormal wear or stuck may be caused. Or if too high, the oil leak may be generated. 2) If the engine operation were continued with abnormal noises and vibration, it causes the engine trouble that can not be repaired or some other troubles. At stop 1) At stopping the engine, perform the idling operation for 5 min. and then stop it.
1) After heavy load operation, if the engine were stopped suddenly, the heat would be conducted to bearing parts from red hot turbine wings that would result in burning the oil to cause the stuck bearing metal and revolving shaft.