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我场有几台JD-4450型拖拉机连续发生下列故障:飞轮壳体有异常响声;离合器分离不彻底;动力输出轴自动接合等。按以往的经验,我们对机车进行了系统压力测试检查,又拆下变速箱进行检查,都没有发现问题。后来发现驾驶室左前支点拖板螺栓被剪断。由于支点螺栓紧靠机壁,断后不易被人发现,时间长了,驾驶室内的操纵机构位置发生了改变,使机车造成上述一连串的故障。我们逐台更换了螺栓后,几台机车全部恢复了正常。
I have a few field JD-4450 tractor continuous failure of the following: flywheel housing abnormal noise; clutch separation is not complete; power output shaft automatically. According to past experience, we carried out a system pressure test locomotive inspection, and removed the gearbox for inspection, did not find the problem. Later found the cab left front support plate bolts were cut. As the fulcrum bolts close to the wall, after the break is not easy to be found, a long time, the cab control mechanism position has changed, so locomotive caused the series of failures. After we replaced the bolts one by one, all the locomotives returned to normal.