起动变速箱是东风4型机车辅助机械传动装置的主要部件之一，因其传递的功率大，结构上厚度较小等原因，工作时常产生轴承损坏，噪声大及有异音等故障，危及行车安全。为此，专门开发了一种新技术，利用JSC—206轴承故障诊断仪等设备，对东风4型机车起动变速箱无须解体即可进行检测，判断其状况，确定故障的类别及具体部位。 Starting gearbox is one of the main components of the auxiliary mechanical transmission of Dongfeng 4 locomotive. Due to the large power transmitted and the small thickness of the structure, etc., the bearing often breaks down, the noise is large and the noise is abnormal, and the operation is endangered Safety. To this end, specially developed a new technology, the use of JSC-206 bearing fault diagnostic apparatus and other equipment, Dongfeng 4 locomotive starter gearbox can be detected without disruption to determine its status, determine the type of fault and specific parts.