My first question is whether the hydraulic failure occurred suddenly or gradually.
Gradually would indicate bad bearings in the pump leading to excessive clearances.
Sudden failure would point to the priority valve having a short circuit to the reservoir. If there is a relief valve in the priority valve that is allowed to remain unseated, that needs to be looked at.
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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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