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Thanks, that was the direction I was working towards. I removed pump. I opened fuel pump and added a small puddle of water. When activating the pump by hand, water did flow out of the plunger end. The plunger would be inside the injector pump and allow fuel to enter oil. This machine has...

Need some help with fuel issue on JD 855. Fuel system kept losing prime. Discovered fuel in crankcase oil. After tractor sat a few hours all fuel siphoned into crankcase. (Has a mechanical fuel pump on this model) I had suggestion that bad fuel pump was allowing fuel to pass into...

Thanks. My thoughts also, just have not got that far yet in the search. Will keep all posted.

JD855 fuel problem. This is later model with mechanical fuel pump, Original problem: Will not stayed primed. Identified additional trouble: fuel oil is getting in crankcase oil. Fuel seems to flows into crankcase when tractor sits after running. Pumps out of valve cover breather hose on...

Thanks, that was next on my list. If good flow - what next?

My JD 855 will not keep prime. After priming and bleeding air from system it starts and runs until all fuel in filter is used then quits. Bad fuel pump??? Once it is primed appears to pumping fuel but will not sustain. Any insights would be appreciated.