There are only two places where you can get fuel into the crankcase on the 806. Either it has to come past the shaft seal or from unburned fuel from the injectors. If you got two additional inches in the crankcase in a half hour of running it is highly unlikely that faulty injectors are the problem. You would surely notice poor starting and excessive smoke if they were that bad. That leaves the shaft seal and pump adapter for the leak.
There is no seal inside the pump. The only seal for the fuel is the rear seal in the adapter housing. The side of the seal with the spring in the lip must face the pump. The front seal is installed with the lip forward and it is there to seal oil from getting into the pump. If the front seal were to be installed backwards it is unlikely that oil would actually leak into the pump since the fuel in the pump is under a slight pressure.
It is possible though unlikely that a porous housing is the cause. A defective housing would usually leak long before this. More likely causes would be a damaged seal, a seal installed backwards, a housing damaged when removing the old seal, or damage to the shaft.
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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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