拖拉机故障四例（）冲坏气缸垫一台东风一１２型手扶拖拉机，工作不到二个月，气缸垫被冲坏。换ｋ新的缸垫，使用不到一个月，又被冲坏。原来是因机手平时加的冷却水过多，往往与水箱口齐平，多余的水就沿缸盖、机体淌下，滴在高温的缸垫上，加之经常在高低不平道路上行驶... Tractor failure in four cases () crash cylinder pad a Dongfeng a 12 tractor, less than two months to work, the cylinder cushion was washed. K new cylinder pad for less than a month, was washed. The original is due to hand usually add too much cooling water, often flush with the tank mouth, excess water along the cylinder head, the body drip, drip in the high temperature of the cylinder pad, combined with often rough roads.