STEERING CONTROL DEVICE FOR WORKING VEHICLE

摘要

PROBLEM TO BE SOLVED: To make a changeover into a state of increasing the working quantity of steered wheels prior to turning a working vehicle with an operator's intention and to easily and safely perform the changeover operation in working vehicle provided with a steering control device. SOLUTION: A tractor 10 with front wheels 26 steered to the right or left by feeding pressure oil from a power steering unit 33 to a steering cylinder 34 in response to the rotating operation of a steering wheel 32, is provided with an advance notice switch 41 actuated interlocked with the depressing operation of a clutch pedal 25. When the advance notice switch 41 is actuated with the operator's intention, pressure oil to the steering cylinder 34 is immediately increased in quantity to increase the working quantity of the front wheels 26.