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| Those PB on the modern Deere are probably lower priority than the valve the are on. But on the older closed center Deere systems what they call power beyond is just a tap of the parallel pressure supply line with pressure set by the pump control.
Adding a power beyond valve to a closed center system the pressure is set by the pump, there's no pressure relief valve in any of the control valves. Open center the pressure relief in on the supply port, so it limits PB pressure too as does the valve on the PB circuit. PB has to use a valve to control its load or it will accept all the oil flow available, and some loads don't need that.
Gerald J. | |
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Can we talk power beyond circuits
