Work vehicle having a speed change arrangement

Abstract

A work vehicle, in accordance with the present invention, having a speed change arrangement comprising: front wheels and rear wheels; an engine supported by the front wheels and rear wheels; power train extending between the engine and at least the rear wheels, the power train transmitting power at least to the rear wheels; a speed change device provided to the power train; an accelerator operating member for controlling the accelerator for the engine; rotational speed sensor that detects an actual rotational speed of the engine; a controller signally connected to the rotational speed sensor, the controller shifting the speed change device to a higher speed position if a difference between a set rotational speed of the engine set by the accelerator operating member and the actual engine rotational speed is less than a first set value, and the controller shifting the speed change device to a lower speed position if the difference between the set rotational speed of the engine set by the accelerator operating member and the actual engine rotational speed is greater than a second set value which is greater than the first set value; at least one manual adjusting member for manually changing the first and second values.