eroclb: PLEASE get a manual before you operate this very much!!!! The knob your twisting on under the seat HAS NOTHING to do with the hydraulic pressure. It is the rate of drop valve for the three point lift. IF you have tightened it in then you may have damaged the valve. If you have it wide open then nothing is damaged but it sure will let things on the three point drop fast!! LOL This knob is to allow you to safely lower things on the three point that weight different amounts. The lighter the implement the more you can open it. For heavy stuff you will need it turned in most of the way.
I am assuming the knob your twisting is #15A or 15B.
Now you have always had to have a JD utility tractor revved up for the loader or backhoe to work with much speed. They have a small displacement hydraulic pump. They are rated at 2100 PSI and 5 gallon per minute flow. Most farm tractors are double to triple that and my JD 410G backhoe is around 40 GPM. Compact utility tractor hydraulics are slower than larger tractors. Just the way it is.
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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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