Tractor with working instruments.

A tractor with two axles and four wheels 8,9 is individually provided at each of its front and rear ends of working tools 2,3 which are the same type, have opposite working direction and can be moved between an active position and an inactive position. The tractor includes a steering system to steer all four wheels 8,9 at the same angle in the same direction, a step of transmission to the drive wheels only near the tools 2,3 which is raised in position inactive or, in a particular case, a system to retain the wheels on the rear, relative to the direction of advance of the tractor, in straight-ahead position without allowing the steering. (CF DRAWING IN BOPI)