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东风型内燃机车的400号轴,位于柴油机控制输出端与中变速箱之间。柴油机通过400号轴把扭矩传递到柴油机控制端后部的各辅助装置,保证机车、柴油机的正常运行。在1975～1977年期间,400号轴连续不断地发生断裂事故。据各机务段的不完全统计,断轴事故是很严重的。例如:麻尾机务段1673号机车连续发生了16次断轴事故,该段的1314、1313、1371号机车也发生过断轴事
Dongfeng diesel locomotive No. 400 shaft, located in the diesel engine control output and the middle gearbox. The diesel engine transmits the torque to the auxiliary devices at the rear of the diesel engine control end through the No. 400 shaft to ensure the normal operation of locomotive and diesel engine. During the period from 1975 to 1977, the No. 400 shaft continuously fractured. According to the incomplete statistics of each locomotive depot, the accident of breaking a shaft is very serious. For example: Machi locomotive section 1673 locomotives consecutive broken shaft accident occurred in the section 1314,1313,1371 locomotive also occurred off axis