空载拖拉机的最大牵引力。对于带变速箱的内燃机驱动，额定牵引力是工业车辆在行驶速度至少为其额定速度的10％时可以产生的最大牵引力。额定牵引力应通过允许额定牵引力不间断的拖拉机运行的时间指示来相加。带有液力变矩器的电驱动或内燃机驱动的额定牵引力基于驱动电机或变矩器变速器每小时的输出功率。它表示空载牵引工业车辆的牵引力，对应于每小时的产量。

         Highest traction force of an unladen tractor. For combustion-engine drive with shift transmission the rated traction force is the highest traction force that an industrial truck can produce at a travel speed of at least 10 % of its rated speed. The rated traction force is to be added by the indication of the time during which uninterrupted tractor operation at rated traction force is permitted. The rated traction force for electric drive or combustion-engine drive with hydraulic torque converter is based on the output per hour of the drive motor or converter transmission. It represents the traction force of the unladen towing industrial truck corresponding to the output per hour.