It actually will cause pressure drop from the pump to the cylinder under flow. As the cylinder loads up and dead heads the pump then the pressure will rise, but all flow of fluid in pipes happens because of different pressures at each end causing the fluid to flow. If the pump has to put out 600 psi to lift the boom it will put up more pressure to lift the boom with a smaller pipe. So long as it doesn't pop the relief. Maybe only 620 psi. But with more pressure the pump slips more and a bit less fluid will flow but at a higher differential pressure. And it will generate more heat with more pump slippage and more horsepower required to put up slightly higher pressure.
He won't notice. I suspect the lines on each end may have been changed too.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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