JD 2020

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JD 2020

Jeff G	I have found diesel fuel in the motor oil on my 2020 John Deere. What could be the problem? The fuel pump was completely rebuilt 1 1/2 yrs ago.
Bill	Hi Jeff I have had this problem in my ase it was that one cylender was not firing due to a burnt valve and so all fuel injected into this cylender ended up in the sump Bill
richard	When the injection pump was removed and replaced there are 2 seals on the shaft that goes into the injection pump. the seal get rolled when you install it if you dont know how to do it. Thus leaks fuel into the engine oil. also the fuel pump can leak fuel into the engine oil . good luck
Jeff	Thanks for the replies it was the rubber seals on the fuel pump shaft....I have since replaced. Was also told that if there is a side mount fuel pump on these type tractors the pump can leak also thus letting fuel into the oil pan also. I was advised to always check the side mounted fuel pump that bolts onto the engine block first before pulling the other main fuel pump.

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