一新出厂的东方红-75型拖拉机,买回后只工作了两天,就出现了起动时飞车的故障。到后来,工作过程中也时常飞车。以致酿成飞车事故:气门摇臂折断、推杆弯曲及气门锁片脱落。换用新件后,开回住地检查。在没有弄清楚故障原因的情况下,机手先后两次拆检喷油泵调速器总成,均不奏效。无奈求助于我们。赶到现场后,按着飞车的一般原因进行了检查,未见异常。遂拆开调速器,一一清洗诸件,接着装配试车。此时,飞车现象消失。变换油门大小,发动机运转平稳。因该车是在起动和热车时易飞车,遂 A new factory Dongfanghong -75 tractors, bought only worked for two days, there was a start-up when the car failure. Later, the work process also often speed. As a result, a car accident occurred: the valve rocker arm broke off, the push rod was bent and the valve lock plate came off. For new parts, open back to check. Failing to figure out the cause of the malfunction, the machineman disassembled the fuel pump governor assembly two times in succession, failing to work. Helpless to help us. Rushed to the scene, according to the general reasons for carrying out the inspection, no exception. Then opened the governor, one by one cleaning all the pieces, then assembly test drive. At this point, the phenomenon disappeared. Change the throttle size, the engine running smoothly. Because the car is easy to fly when starting and hot car, then