I asked in my post up above to mkirsch, but you may not have seen it yet. Do you know the history of the machine? Has there been any work done to the tractor lately? It's shapin' up like something is busted pretty badly or something isn't put back together correctly.
If you can see each valve stem moving when the rocker arm bears down on it, you should be finding some compression somewhere even with just a little oil per cylinder on the test. You could have one or two two valves stuck and not popping up completely, but if the motor was left to get stuck, it whould be two valves at most. At any given time in a four-cycle, four cylinder motor, there are only two valves open at any one time -- one for exhaust, one for intake. both valves on the other two cylinders are closed up on either combustion or compression. (the design of the cam make make that not QUITE true, but it's a good rule of thumb that the motor will stop in a position like a describe.
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Today's Featured Article - The Cletrac General GG and the BF Avery A - A Bit of History - by Mike Ballash. This article is a summary of what I have gathered up from various sources on the Gletrac General GG and the B. F. Avery model A tractors. I am quite sure that most of it is accurate. The General GG was made by the Cleveland Tractor Company (Cletrac) of Cleveland, Ohio. Originally the company was called the Cleveland Motor Plow Company which began in 1912, then the Cleveland Tractor Company (1917) and finally Cletrac.
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