I converted a Sear's tractor to hydraulic 30yrs ago; it still works fine. I kept the transmission in place, just added a pump and motor in place of clutch. I came across two hydraulic gear motors (high speed), the same size, so I used one as a pump and one as a motor. Since they were the same size, the motor output speed was the same as the pump's input speed. I used the same pulleys (belt drive) as the original setup. You want about 0.8 to 1.2 cu. in.; depends on what motor you find.
Then what you want to do is find a priority flow control (divider) and tap off some oil for your FEL. When your using the FEL the tractor will go slower, so you just use a higher gear. Your not gonna be using high travel speed for loader work anyhow. When you bypass the loader you have practically same speed as you did before conversion.
Then what you want to do is find a priority flow control (divider) and tap off some oil for your FEL. When your using the FEL the tractor will go slower, so you just use a higher gear. Your not gonna be using high travel speed for loader work anyhow. When you bypass the loader you have practically same speed as you did before conversion.