Patent ID: 7114591

Claim:
A steering system for a working vehicle comprising front wheels, rear wheels, and a steering apparatus for steering the front wheels and the rear wheels, said steering system comprising: mode changing means provided in said steering apparatus for changing over a mode of steering the front wheels and the rear wheels between two-wheel steering and four-wheel steering; mode change instructing means for instructing change of the mode of steering the front wheels and the rear wheels; first indicating means for indicating a current steering mode of the front wheels and the rear wheels; second indicating means for indicating whether the front wheels and the rear wheels are at neutral; and control means for controlling said mode changing means and said first indicating means so that an instruction outputted from said mode change instructing means is made ineffective and said mode changing means is not operated even with said instruction outputted from said mode change instructing means when said second indicating means indicates that the front wheels and the rear wheels are not at neutral, and said mode changing means is operated, in response to an instruction outputted from said mode change instructing means, to establish a steering mode corresponding to the instruction only when said second indicating means indicates that the front wheels and the rear wheels are at neutral, and that said first indicating means always indicates, as the current steering mode, a steering mode corresponding to an operated state of said mode changing means regardless of the instruction outputted from said mode change instructing means.