东风1、3型内燃机车三、四位牵引电动机的引出大线线鼻子经常发生烧损。据我段统计,一九七八年发生10起,今年1～4月发生两起。对这故障,我段曾采取过一些措施,如在架修时,认真检查各大线鼻子的内阻,并严格控制在不大于0.000009欧的范围内。但仍不能有效杜绝三、四位电机大线鼻子着火故障的发生。这类故障往往造成机车破敞和临修。同时,由于三、四位电机靠近油箱,着火如不及时扑灭,很可能酿成火灾,造成更大的经济损失和不良的政治影响。最近,我段针对三、四位牵 Dongfeng 1,3 type diesel locomotive three or four traction motor leads to large nose nose often burn. According to my statistics, there were 10 incidents in 1978 and two in January and April this year. On this fault, I have taken some measures, such as in the repair, carefully check the internal resistance of each line nose, and strictly controlled in the range of not more than 0.000009 Europe. But still can not effectively put an end to three or four motor large nose ignition failure occurred. Such failures often lead to locomotives broken and temporary repair. At the same time, as the third and fourth motors are close to the fuel tank, if the fire is not extinguished in time, it is likely to cause a fire, resulting in greater economic losses and adverse political influence. Recently, I paragraph for three or four lead