针对DF4型内燃机车运用过程中抱轴瓦发生的碾片问题进行原因分析,提出了改进措施,解决了碾片问题,保证走行部安全,取得了良好的效果。 Aiming at the reason of the milling problem of the axle bearing in the process of using the DF4 diesel locomotive, the improvement measures are put forward to solve the problem of milling and guarantee the safety of the running department, and the good effect has been achieved.