I hope for his sake you are correct on your diagnosis, that being said, I have had several hydros apart, never once did I find that to be the problem. Had stuck shuttle valves, plug fell out on end of shuttle valve causing a lurch problem, several worn lever mechanisms causing drive to stop midway into range and a host of simple to complete trashed units. I would suspect something in the speed ratio cam or orfices or servo cylinders myself and would do a pressure test on the servo circuit but, there are a million things that can and do happen inside these units. For the most part, they are very reliable with good clean fluid and filters changes.
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Today's Featured Article - What Oil Should I Use? - by Francis Robinson. I keep seein this question pop up over and over again in discussion groups all over the web. As with many things there are often several right answers and a few wrong ones. Some purist I'm sure will disagree to no end with what I will tell you but most of us out here in the real world don't really care do we ? Some of them only bring their noses down out of the air long enough to look down them anyway. If you are like me you are only doing this old tractor stuff because you enjoy it. You
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