3020 jd diesel in oil

[treetrimmer01]

If this is a old 3020 diesel you have a fuel pump on the right side, front of engine it has a weep hole in it you shood see some dirty oil by the pump. sometimes the weep hole gets plugged with dirt and if the pump goes bad it will put fuel in crankcase.
The fix is a new fuel pump.
Could be fuel injection pump, But I would replace the fuel pump first.
Always check oil before start up
Good luck treetrimmer01

[Tx Jim]

I sure wish JD engineers hadn't numbered some of the CUT's using the same numbers as older JD tractors. It makes it very confusing.

[duke7595]

Turn pump upside down and after replacing u-cup seals(parts key #18) on drive shaft,lubricate the seals then carefully slide the shaft into pump(being careful to line up dots) so as to not wrinkle the first cup back. The JD tractors that are very difficult to install inj pump without a tool are the models that the shaft stays in the engine

Thank you for this information, I'm sure many of the members will appreciate it.