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装有72年以来生产的ZQDR-410牵引电动机的东风_4型4000马力内燃机车先后使用在北京内燃机务段、丰台、济南、广州及南京等机务段。到75年11月前,该牵引电动机抱轴瓦出现了大量的烧瓦与碾瓦现象,在大连工厂的机车出厂试运中也有同样现象发生。以75年9月份为例,机车编号为0002～0022及2027～2031的27台机车中,共烧瓦63块,严重影响了机车的运用。这一问题出现后受到铁道部工业局及工厂党委的重视,于75年3月份
Dongfeng _4 4000 horsepower diesel locomotive equipped with ZQDR-410 traction motor, which has been produced for 72 years, has been used in locomotive depots such as Beijing Internal Combustion Engine Service, Fengtai, Jinan, Guangzhou and Nanjing. Until November 75, the traction motor bearing bush appeared a lot of burning and crushing phenomenon, the factory in Dalian factory trial run the same phenomenon occurs. Taking 75 years in September as an example, of the 27 locomotives with locomotive numbers 0002-0022 and 2027-2031, a total of 63 were burned, which seriously affected the use of locomotives. After the emergence of this issue by the Ministry of Railways Industrial Plant and factory party committee attention, in March 75