(一) 工况搬把固定不良故障经过我段的东方红<5>型078号机车于1979年2月在运用中发生工况离合器打齿,扣临修。损坏处所打开上盖及罩子检查,发现内外齿离合器端面打铆,但拨块完整,侧面仅有轻微磨耗,工况搬把与轴有相对转动。原因分析由于工况搬把与轴连接的定位螺丝松动, (A) the condition moved to fixed bad failure after I segment of the Hongfanzhuang <0> 078 locomotive in February 1979 in the operation of clutch clutching teeth, buckle repair. Damaged places to open the cover and cover inspection and found that the internal and external teeth riveting the clutch end face, but dial block integrity, only a slight wear on the side, working conditions and the relative rotation of the shaft. Analysis of the reasons moved to the shaft to move the positioning screws loose,