Closed center system... oil circulation stops when there's no demand... pump "goes out of stroke" and pumps only enough oil to keep system at "standby pressure" saving power and reducing heat.
The way it was taught to me in JD tech school. When pressure stabilizes above set stand-by pressure(2250 psi is factory setting),trapped oil in crankcase of hyd pump(caused by stroke control valve closing) forces pistons away from pump crankshaft causing no oil to be pumped and psi is trapped in lines. When crankcase pressure drops pistons are pushed by springs back against turning crankshaft and pumping commences.
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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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