Hello,nI hope you are well. nI created a model which is separeted in to 2 modellica model as gear, which is motorized mechanism, and valve. I tried to simulate output torque of reduction. Because there is reduction with 1:24 gear ratio. After that, the torque ,which is generated from this part of valve, should be the reference of my systems on or off condition. nBut still, I dont have what I need. You can see my works below. The liquid, we can assume it is liquid. And the pump get rotational movement from tractor shaft as 540rpm. With the thee junctions, I tried to get best fit to our valves.Regards.nn