Reply to BobPV15:
You need a much smaller pump, like 1 to 2 gpm. A by pass system will not work. The pump has to pump the full flow at the pressure needed to move the cylinder. The energy of the bypass flow is just waisted over an orifice.
You would need a wide toothed belt to transfer that kind of horsepower.
[quote="BobPV15"]You need a much smaller pump, like 1 to 2 gpm. A by pass system will not work. The pump has to pump the full flow at the pressure needed to move the cylinder. The energy of the bypass flow is just waisted over an orifice.
You would need a wide toothed belt to transfer that kind of horsepower.[/quote]
While I agree entirely that a smaller (and probably lower pressure) pump is the best solution I believe a relief valve bypass will work. For starters it does not bypass all the time but only for the short time when the cylinder control is engaged. A good question is what is the pressure needed. The tilt cylinder should not take much pressure to tilt as it is somewhat of a balanced system. If the blade cylinder needs 1,000 PSI to function a bypass relief set at 1,100 PSI would allow the excess oil to bypass, while the cylinder circuit would get all the oil it could flow. Path of least resistance. It will bypass only for the amount of time the control is engaged and then reverts back to its normally open circuit. The unknown is if the belt has enough traction to turn the pump with that much volume at the lower pressures.
Edit: As edb mentioned a larger pulley on the pump would also help in 2 ways. Increasing the amount of belt friction area and at the same time slowing down the pump to produce less volume.