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1 前言 ＮＤ5型机车是大连机务段的干线内燃机车，配属 75台。该车型在大连机务段将近运用 16年了，由于超长运用、配件不足等原因，机车在运用中经常发生曲轴箱超压故障，平均发生率 2 5件／月，严重影响正常的运输生产，危及人身安全，所以研究分析曲轴箱超压故障及防治
1 Preface The ND5 locomotive is a trunk diesel locomotive of Dalian locomotive depot and is attached to 75 units. The model used in Dalian locomotive nearly 16 years, due to the long use, lack of spare parts and other reasons, the locomotive in the use of crankcase overpressure failure, the average incidence of 25 pieces / month, seriously affecting the normal transport production, Endangering personal safety, so research and analysis of crankcase overpressure failure and prevention