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介绍了在部分机务段运用的东风。型机车8240ZJ型柴油机中间齿轮及支架断裂、脱落的故障情况，找出原因并采取了相应的改进设计和工艺措施。
Introduced the use of some locomotive depot Dongfeng. Type locomotive 8240ZJ diesel engine gear and bracket broken, falling off the fault situation, find out the reason and adopted the corresponding improvement in design and process measures.