Patent ID: 8733770

Claim:
A working vehicle having a pair of drive wheels for dual path steering and at least one caster wheel being part of a castor wheel assembly selectively providing steering assist to drive wheels, the caster wheel assembly comprising: a pivoting caster spindle coupled with a caster wheel; an engagement plate connected to the caster spindle in a fixed manner such that the engagement plate pivots with the caster spindle; a pivoting steering arm rotatably connected to the caster spindle; a steering cylinder connected to an outward end of the steering arm with a tie rod configured to pivot the steering arm; and a keyed connecting mechanism for engaging the steering arm with the engagement plate, the keyed connecting mechanism having an engaged position and a disengaged position, wherein in the engaged position the keyed connecting mechanism couples the steering arm with the engagement plate such that the steering cylinder pivots the caster spindle and caster wheel, and in the disengaged position, the steering arm is uncoupled with the engagement plate such that the caster spindle and caster wheel are free to pivot independent of the steering cylinder.