Hand Lever Hydrostatic . The pump generates a pressurized flow of oil to the motor, which in turn moves the wheels that are attached to. Never have used the hand lever model, think i prefer the foot control. Rix Engineering Tandem Vertical Hydraulic Handbrake Lever Rallynuts from www.rallynuts.com John deere 4400, farmall a. 0.2 gallon displacement per 100 strokes. They feature revtektm technology allowing you to cut while in reverse.