Tractor equipped with working implements

Abstract From the Canadian patent

A two-axle four-wheel tractor is equipped at its front and rear ends with working implements individually, which are of the same type opposite in working direction, and shiftable between a working position and a nonworking position. The tractor has a steering system for steering the front and rear four wheels in the same direction through the same angle, a running transmission system for driving only the wheels positioned toward one of the working implements which is lifted to the nonworking position or, in a special case, a system for restraining the wheels positioned rearward with resepect to the direction of advance of the tractor in a straight running position without permitting …