Preceding researches proved that improper driving lead of tractor front wheels results in power circulation in transmission system, excessive wear of tires, premature rough ride, lower braking performance, and higher fuel consumption for mechanical front wheel drive (MFWD) tractor in rectilinear motion. For the first time, this study attempts to ascertain the driving lead dependency on draft force for the MFWD tractor which has not been yet addressed in the state of the art. To eliminate the effect of inflation pressure of high-lug radial tires on the driving lead, it was kept constant at 204 and 136 kPa for the front and rear wheels, respectively. The tractor was loaded by draft force required for fully mounted plow implement. It was found that the driving lead nonlinearly augmented from 1.86 to 8.08% as draft force augmented from 7.88 to 37.81 kN. Possible explanations and interpretations for this result have been completely documented in the paper. Overall, in order to manage the driving lead in admissible range in the loading operations, inflation pressure adjustment of the tires by means of commercial central tire inflation system is emphatically suggested as the first priority rather than ballast weight application.

先前的研究证明，拖拉机前轮驱动提前不当会导致变速箱系统中的动力循环，轮胎过度磨损，过早的不平顺行驶，较低的制动性能以及机械前轮驱动（MFWD）拖拉机在直线运动中的较高油耗。此项研究首次尝试确定MFWD拖拉机的驱动力对牵引力的依赖性，这在现有技术中尚未解决。为了消除高凸度子午线轮胎的充气压力对驱动导线的影响，前轮和后轮的充气压力分别保持在204 kPa和136 kPa。拖拉机由完全安装的犁具所需的牵引力加载。发现驱动力从1.86非线性地增加到8.08％，而牵引力从7.88非线性地增加到37。81千牛。该结果可能的解释和解释已在文件中完整记录。总体上，为了在装载操作中将驱动提前量控制在允许范围内，着重建议通过商用中央轮胎充气系统来调节轮胎的充气压力，而不是应用压载重量。