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 - Tractor Hydraulics - The Basics - by Curtis Von Fange. Hydraulics was one of the greatest inventions for helping man compound the work he can do. It’s amazing how a little floor jack can lift tons and tons of weight with just the flick of a handle. What’s even more amazing is that all the principals of hydraulic theory can be wrapped up in such a small package. This same package applies to any hydraulic system from the largest bulldozer to the oldest and smallest tractor. This short series will take a look at the basic layout of a simple hydraul
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