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There was a suggestion about using oil, a jack, a tree, and a couple 6 packs of beer on here a while back. My neighbor used the technique successfully on his Farmall-H, after trying lots of other things for several weeks... Let me recap - but disclamer is that it is not my idea. It worked for my neighbor, it worked for the other guy who suggested it, but it could bend a connecting rod in my opinion, so it should not be one of your first choices... Here is basically what the idea was... Remove the oil pan. Remove the spark plugs if the head is still on it. Fill cylinders full of good penetrating oil. Many brands have been suggested here, so I won't repeat that part. Jack up front of tractor by putting jack under one of the connecting rods. Go sit under the tree, and consume the beer. When the beer is gone, the engine will be unstuck. We determined that the brand of beer was not that important, although we used a quality product here. I believe that budweiser was the original suggestion. ~~~
Another posting that I saw, and it looked like it had lots of merit, was to make a zerk fitting to spark plug adapter, install it in a spark plug hole, and pump the thing full of grease. The pressure of a grease gun is wicked high, and that should unstick the piston. The only drawback that I can see here is that if the piston being pumped up is not the one that is stuck, You might again bend a connecting rod. Might be best to loosen or remove the rod caps and work on each piston independently, so all the force is directly applied to the piston and not thru the rods or crank.
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