Trailer vehicle with a tandem axle

The towing vehicle has a check valve (19.0) that is arranged in the piston rod side annular cylinder displacements (13.0.1,13.1.1) of a rear axle of a tandem axle, where the displacements are associated with a compensation- and suspension cylinder (13.0) that is guided to connecting lines (16.0.1,16.1.1). The connecting line is guided to a hydraulic system (20.1).