Bringing an old WD back to life

So, because I'm a glutton for punishment, I bought a non-running and not entirely complete WD at auction about a month ago: https://www.allischalmers.com/forum/what-have-i-gotten-myself-into_topic183566.html

Congratulations, many of us have drug em home like that, it’s the challenge of bringing one back to life. Start with the heart, big concern if the exhaust wasn’t covered. Obviously being open to the elements is never good especially if it has sit outside like that for a period of time. Put a wrench on the crank bolt and see if the engine can be moved. If it doesn’t, next step is to pull the head and see what it looks like after you remove the head. If you see lots of rust and corrosion then I would drain the fluids and drop the pan. See what the bottom end looks like. If its bad as well and appears to be beyond help then search for a new engine. If you feel it’s not too bad, my choice of getting one unstuck is Kroil. It’s kinda expensive but it’s good stuff. Let it soak for a few days, keep the top of the piston covered in it, that way it make its way down the side of piston onto the rings. It’s called the oil that creeps, and that’s what it does as it eats away the rust as it goes. Don’t get in a hurry on a stuck engine, it takes time if it’s really bad. It’s no use starting on the rest of the tractor until you figure out the engine. If you are financially committed to seeing it through then by all means start the other repairs.

The crank pulley is the bottom pulley on the engine. Should have a belt running the generator and water pump off the crank. You do not need to remove the the bolt or pulley. I use a 1/2” long bar breaker bar with whatever socket fits. The long bar allows me to be outside of the tractor frame to try to move it back and forth. Do not force it too hard. Rocking it back and forth sometimes gets it loose after soaking the rings. Kroil got my brothers 190XT unstuck in one day after it had been sitting for sometime due to a blown head gasket. Bought it with a stuck engine, cleaned up the cylinders, new head gasket, and it runs great. Pretty even compression on all cylinders. That was probably 5 years ago.
Hope it goes well. You may have to order the Kroil, limited dealers, but I order mine through Amazon. I use it in the can ,not a aerosol can.

While you will probably question your sanity several times while working on this the first time that engine coughes your heart will race and your determination will grow. Try to keep in mind many of these tractors were built in a much simpler time and can be fixed with limited skills. The people on this forum will help in your quest as most have done it themselves, though a parts manual or repair manual can be very helpful also. Personally I like parts manuals as they show me how things come apart and go back together. Good luck and when in doubt posting pictures here will help others help you. 

Ok, are the spark plugs still in the head? If they are you are turning the engine to its compression stroke.

Look at the dipstick to see what you circulating thru the engine, oil is cheap compared to an overhaul, change it, then mark the plug wires and pull the plugs out, clean them, and put a little oil in holes, then I would crank it awhile, maybe even leave it set overnite with plugs in loose, pull them and crank it again. If everything is still turning well at that point check for spark before installing the plugs, if good, put plugs in, hook them up, if not may have to file points.  See what is in the cooling system. Maybe even flushing with water while your circulating oil by hand would help. Then fill cooling and get fuel to it to see where you are. Hopefully fire in the hole and you are off and running. If it runs I would change oil again after getting it hot a couple of times to remove any contaminants in system.