It's not impossible for a Minimec pump to force fuel into the engine, but there would be some erratic govenor behaviour if it was. For the Minimec pump to do this, first you need a plugged breather tube on the pump's cambox so that any leakage fuel in the pump can't escape. Then it might force fuel/oil past the pump shaft seal and into the engine. I'd hazard a guess that IF there is a surge of fuel in the pump's cambox that this fuel is coming from a bad diaphram in the lift pump which is driven from the pump's cam. So.... check that the pump's breather is clear and check that the lift pump is not buggered. I'd do that and probably change the lift pump if I was suspicious of it in any way before removing the injection pump. Those pumps more typically run in the 2 grand range around here, but not too many ofthem ever need to come off the tractor....
It's also possible for a bad injector to dump fuel into the engine and have it wash down past the rings.... BUT, on that engine it would run quite rough in that situation and probably make a lot of white smoke.... so you'd probably notice that.
The most common source of a ford engine making oil, BY FAR is a bad power steering pump. When they get worn to a certain point the shaft seal will leak... into the engine. If you're constantly adding PS oil, that's likely where it's going.
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Today's Featured Article - Tractor Profile: Farmall M - by Staff. H so that mountable implements were interchaneable. The Farmall M was most popular with large-acreage row-crop farmers. It was powered by either a high-compression gas engine or a distillate version with lower compression. Options included the Lift-All hydraulic system, a belt pulley, PTO, rubber tires, starter, lights and a swinging drawbar. It could be ordered in the high-crop, wide-front or tricycle configurations. The high-crop version was called a Model MV.
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