Posted by UP Oliver on October 25, 2013 at 09:20:01 from (208.68.25.63):
In Reply to: Fuel in oil posted by John Kalepp on October 25, 2013 at 05:08:27:
I had the same problem (for a long time) with my David Brown 990. My leak turned out to be through the thermostart (if that is the right term) on the intake manifold. There was a little tube that went from the fuel tank to the thermostart, and the leak in there just got worse over time. I blocked that off and so far my oil level is staying where it should be.
Before I blocked that off I was told to take my lift pump off and put a container under it for awhile to see if it leaked, still hooked up to the fuel system. (I actually bought a new lift pump before this, that was not the problem) I never saw a drop there. Another suggestion that was given to me was to drop out the oil and take off the oil pan to see if I could tell where the fuel was coming in. I never did that but wish I would have done that first, because I would have known it was not the injection pump. I sent that in at one point and spent $50 to have the front seals replaced because someone told me that had to be the problem if the lift pump was OK
I also had this problem on my Oliver 1755. That turned out to be a leak along the outside of the shaft tube in the injection pump; I could see it leaking down from under the injection gear and the pump guy had just replaced the seals. I sent it back and he found the leak on the outside of the shaft tube.
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