We experienced a slow decrease of Lub Oil pressure on both Yanmar generator engines. The normal pressure is 6 bar. The LO pressure of running generator decreased slowly down to 5 bars. After startup of stand-by Auxiliary engine, it’s initial LO pressure was 6 bars, but when we loaded it, the pressure began to slowly decrease down to the same 5 bar... What may be the cause of decreased pressure? |
The LO pressure may decrease along with increased temperature or due to the faulty LO pump. Check the LO temperature on both generators. If it is higher than should be, there is a problem with the LO cooling. Since low LO pressure experienced on both AE at the same time looks like your engines lack of LO cooling. I this case, carry out the following checks:
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