我们有一台东方红—75拖拉机,有一次在停车熄火前发动机工作正常,而在停车熄火3小时后再起动时,发动机便出了故障。故障表现是:曲轴正方向不转,反方向有一定小范围的转动;用起动机带动时,一结合起动离合器,起动机就要灭火;用手摇把根本摇转不动。 We have a Dongfanghong-75 tractor, one time the engine was working well before the engine stopped, and the engine failed when it was started three hours after the engine stopped. Fault performance is: the positive direction of the crankshaft does not turn in the opposite direction has a small range of rotation; with the starter drive, a combination of starting clutch, the starter will be extinguished;