I am not familiar with that model and really never worked on the foot operated hydrostatic drive machines. However, if it does have a dump valve pedal etc for starting like the 656 with pedal hydros, that is the first thing I would suspect. If you unhook the return line from dump valve no oil should come out of valve, (ALSO VALVE HAS TO SEAT COMPLETELY WITH NO INTERFERENCE FROM DIRT OR STRIKING PLATFORM ETC). If that is ok, I would remove both lines that go to the reverse alternating check valve block and plug the fittings to eleminate any outside problems from internal problems. I'm not even sure your tractor has these valves so good luck.
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Today's Featured Article - Harvestin Hay: The Early Years (Part 2) - by Pat Browning. The summer of 1950 was the start of a new era in farming for our family. I was thirteen, and Kathy (my oldest sister) was seven. At this age, I believed tractor farming was the only way, hot stuff -- and given a chance I probably would have used the tractor, Dad's first, a 1936 Model "A" John Deere, to go bring in the cows! And I think Dad was ready for some automation too. And so it was that we acquired a good, used J. I. Case, wire tie hay baler. In addition to a person to drive th
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