小四轮拖拉机或手扶拖拉机均采用单缸柴油机作动力，其轴瓦大都是在圆形用背上涂一层减磨合金．轴瓦与曲轴的标准配合间隙为0．05～0．11mm。当此间隙超过0．25mm时．柴油机便发出沉重的回击声，同时机油压力也明显下降，若不及时更换新瓦，就可能发生烧瓦抱轴的事故。新换轴瓦 Small four-wheel tractors or walking tractors are used single-cylinder diesel engine for power, the bearings are mostly round with a layer of anti-wear coating on the back. Bush and crankshaft with the standard gap of 0.05 ~ 0.11mm. When this gap exceeds 0.25mm. Diesel engine will issue a heavy response sound, while the oil pressure is also significantly decreased, if not in time to replace the new tile, it may happen to boil the axle of the accident. New bearing pad