今年3月,我县新丰乡一社员买了原队营的一台手扶拖拉机,用车前经检查,发现缸套有裂纹。当天换了一个新缸套。第二天,行车不到一公里,发动机自行熄火,拆下缸盖检查,发现缸套又炸裂了。再买一个新缸套装好,试车结果,缸套又破裂了。取出破缸套可见断口在缸套凸肩与上安装带之间,裂纹延伸 In March of this year, a member of Xinfeng Township in our county bought a walking tractor of the original team battalion. After checking with the car, it found that there was a crack in the cylinder sleeve. The day changed a new liner. The next day, driving less than one kilometer, the engine self-extinguishing, remove the cylinder head inspection and found that the cylinder liner burst again. Buy a new cylinder suit, test results, cylinder liner and broken. Remove the broken cylinder liner visible fracture in the cylinder shoulder and the mounting band between the crack extension