It seems I have the same problem that "1 Dollar" posted under this subject a few years ago. My 2020 (TYP T5R3C / SER 075265T) is getting diesel in the crankcase, even when parked. I've already changed the transfer pump with no help, so the injector pump is now the suspect. It's the "bad news" model CBC431-3AL pump. Since this tractor has blown what I think is fuel-smoke (no significant oil loss) for the few years I've had it, the injector pump is probably suspect for that as well. Would anyone have any current leads on the preferred models that "jdemaris" listed (DBGFC431-25AJ, JDB431AL2408, or JDB431AL2731)? Also, I understand that installing the pump requires setting the flywheel to the appropriate top-dead-center position with the set pin. Does anyone know the trick to turn the flywheel manually to get that proper position for the changeout?