I have a Doosan compressor powered by a JD 4024 with only 1900 hrs. On a test run, the sump filled with fuel up to the dip stick. I was wondering what could be causing this to happen.
On that engine there are 4 individual fuel pumps built into the engine, one for each cylinder and they are operated off cam shaft. They are a SOB to replace and are supposed to be done in sets. I don't know how you would test to know which one would be the culprit.