Patent ID: 8875507

Claim:
An adjustable control arm assembly for a hydrostatic pump having a pivotal control input shaft, the assembly comprising: a first arm connected to the pump control input shaft to provide a pivotal input; a second arm having a slot, a notch, and a bore disposed between an end of the second arm and the notch, the bore intersecting the slot, the second arm being adjustably connected to the first arm; a half nut having a threaded half bore, the half nut being disposed in the slot of the second arm, the half nut being connected to an end of a pump control rod; a threaded adjustment rod being disposed within the bore of the second arm and being retained therein by way of a nut disposed in the notch, the threaded adjustment rod threadably engaging the threaded half bore of the half nut; whereby clockwise and counter-clockwise adjustment of the threaded adjustment rod causes the half nut to move up and down respectively relative to the slot thereby varying the throw of the control arm.