It has variable displacement pumps and a rod that sticks out of each pump to adjust the blow (see:
http://www.tractorbynet.com/forums/...you-shake-your-00303_4sn7rj3yfrh_1200x900-jpg its the rod sticking out the side with the red collar and a bolt through it), but no human usable controls from the seat area.
It looks like a half done, poorly thought out project to me.
Aaron Z
Are all of these replies in jest or do you guys seriously think this unit is intended to be ridden on?