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No, there isn't an "easier" way, but there is a RIGHT way, which is to troubleshoot the system, then fix whatever is broken. If you just bleed the cylinder back down, then it won't go down again the next time you raise it. However, if you FIX the problem the right way, it will go down again the next time you raise it. What's wrong? What could be wrong? Dunno. Could be any number of things, like blockage in the lines, broken linkages up under the hood, broken internal parts in the valve stack... or it could be as simple as the valve being accidentally set for single-acting cylinders. Does ANYTHING happen when you push the lever ahead to lower the hitch? Does the tractor grunt a little like it's pumping hydraulic oil? Does it sound like the relief valve is popping open (a buzzing sound)? If nothing happens, then I would suspect a mechanical problem. If the tractor acts like it's trying to lower the hitch, then you need to start looking for a blockage.
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