一辆三轮农用运输车的离合器踏板自由行程在上坡时变小 ,在下坡时变大。同时 ,发动机动力下降 ,机车上坡时出现异常响声 ,且空压机皮带边缘容易起毛和翻面。经过检查 ,该车发动机固定螺栓无松动现象 ,由此可以初步判断 ,其故障为曲轴止推片处松旷所致。于是拆掉离合器壳底盖 , The clutch pedal free travel of a three-wheeled agricultural vehicle becomes smaller on uphill and larger on downhill. At the same time, the engine power down, the locomotive upside down abnormal noise, and the edge of the air compressor belt easy to fluff and turn over. After examination, the car engine bolts without loosening, which can be initially judged, the failure of the crankshaft thrust piece caused by Song Kuang. So remove the clutch cover bottom,