So you put a pressure gage in the line that feeds the lift side of the cylinder and the pressure goes up when the valve returns to the center position.
The only thing that would cause the pressure to rise like this is to apply pressure to the line that feeds the down side of the lift cylinder.
A leaking cylinder would never do this you would actually maintain or loose pressure as the arms go down.
I don't know the system or if someone played with how the hoses are hooked up.
I'd start with the valve and is it letting high pressure oil enter the down circuit when in the center position.
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Today's Featured Article - Show Coverage: Godfrey, Illinois Country Days - by Cindy Ladage. Except for last fourth of July's Old Gold show in Springfield, Illinois, I don't remember when it was so hot. Nevertheless, the heat didn't keep vendors and visitors alike from enjoying the third annual Country Day's Event. Jane Elliott said the event was originally a one man show. "Barry Seiler, owner of Country Town Farm Supply store used to invite people up to the Johne Deere store. He would give hats and a free meal for everyone that brings a tractor." Elliott said while this
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