Zero turn mower steering system

[0011]FIGS. 1-3 show one embodiment of zero turn mower steering system 100 on ZTR mower 102 having a pair of rear drive wheels 104 that are independently powered so that each rear drive wheel rotates independently of the other rear drive wheel. Each independent drive may include an integrated hydrostatic pump and motor unit 105 coupled to one of the rear drive wheels. Each hydrostatic pump may have a swash plate that may define a pump stroke between a full forward position, a neutral position, and a reverse position. The ZTR mower may have a frame 106 supported on a forward end by front wheels 108, and a rear mounted engine 110 behind operator seat 112. The seat may be mounted over the frame for a seated operator to use left and right motion control levers or sticks 114.

[0012]In one embodiment, the left and right motion control levers or sticks 114 are mounted on the ZTR mower and are pivotable between forward, neutral and reverse positions. Each motion control lever or stick may be mo