This paper discussed the main cause that DF4 type diesel locomotive axle suspension bush fault happend and it put forward some advice on improvement.

对DF_4内燃机车抱轴瓦碾瓦故障的主要原因，从配件的加工及组装工艺进行了分析，提出了必须注意的关键点及改进意见。

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The results show that stress in hollow beam and semi-shaft bush is much less than permissible stress, while joint of suspension frame and axle housing has too large local stress.

结果表明，驱动桥壳空心梁和半轴套管部分的应力远小于材料的许用应力，而悬架支座与桥壳连接处出现了局部应力过大的情况。

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