Kind of late to check if you have it partly apart, but sounds like system is staying on demand, in other words deadheaded, going over relief valve. Usual cause is plugged orfice screen in regulator valve assembly or one of the single to double change stems have been turned too far, broken or bent roll pin on the stop. Many ways to check to see if it staying on demand, easiest is to pull or push one of the hyd levers that have nothing hooked to them and see if you can notice system going on demand then or if it is always on.
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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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