Combines fuel in the oil

Is engine running wellIJ A cylinder not hitting can put fuel in oil. A bad injector or injectors. Fuel lift pump or main pump. I'm assuming your oil level is rising. Is there a hydralic pump fastened to and driven off of engineIJ Maybe hydralic oil getting in thereIJ Diesel would be thining oil to point you notice loss of pressure.

the combine is running hard every day, more than 10 hours every day. The oil level is raising every day. The hydraulic levels are correct and it burns the fuel very good, no smoke. I replace the the fuel lift pump today.

I had that problem on my M2 don't know if it's the same thing or not but we had a bad o-ring on the fuel pump shaft. Hope this helps, Curt