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There are various ways to break one free - some will do just that - BREAK it free. PATIENCE is the key to un-sticking that tractor without causing even more damage than it already has. First check some possibilities. Is the starter stuck? Old Farmalls will sometimes have the starter bendix jam, and the engine will not turn, even if you try to force it. Get a 3/4" wrench and loosen the two bolts holding the starter. Then re-try it. Second, did this thing set out in the rain and accumulate a lot of water down the exhaust stack? If so, it may be seriously stuck. Pull the spark plugs and see if there is water on them. Also try turning the engine with the spark plugs out. If there's no progress by this point, it's time to sqirt a LOT of penetrating oil into the cylinders through the spark plug holes, and jack up one rear tire. With one rear tire off the ground, brake for that wheel released, and the tractor blocked so it can't roll, put it in 5th gear and rock that tire forward and backward while watching the fan on the engine. You may be able to loosen it up. Once you see the fan move both directions, you're on your way! If you have no luck with this procedure, tie a heavy weight (wheel weight works well) on the front side of the tire and let the thing set all night. When you come back in the morning it may have moved due to the steady pressure. If no luck, try it the other direction. If none of this works, you'll likely have to pull it apart. Some folks will recommend simply hitching it behind another tractor and dragging it until something moves. That method might break it free, or it may simply break it. Taking the head off of it will let you see what's going on in the cylinders. If it has swallowed a lot of rain water, you'll find your problem that way. It's always possible that it's stuck in the lower part of the crankcase, but unless it was run very low on oil, that's not likely. Good luck!
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