Hydraulic drive for PK

Is it possible? I have been reading a lot about FEL while I am waiting for spring and my own FEL project. Has anyone made a hydraulic drive PK? Could the clutch, front transmission and coupler be removed and replaced by a hydraulic pump in place of the clutch and then a hydraulic motor attached to the rear transmission? The extra capcaity of the FEL system would aid in this design but might need some extra cooling. Ideally a foot peddle similar to those used on hydrostatic drive tractors in place of the clutch would make a FEL tractor much more user friendly. What do you think?

Terry