I think mine is a 2443. From what I can find out the controls ron a rototiler for the rice paddys. The first control should be an oversized toggle. That controls the 3ph up and down. When mine worked right , one knob controlled the speed that the hitch raised and one controlled the height. l have had to run a hot wire to the circuit board to keep mine working. The 3ph drifts down and I'm not sure if thats the solenoid or the hydraulics. mine has been a good tractor. Bent and abused but it will still pull good and pickup a roundbale when it has to. The 4wd has never worked and I put truck tires on the front and I start it with a screw driver.I cant wait for my boarding business to pickup so I can buy a new tractor.