一台东方红一802拖拉机，在使用中发现气门间隙常变，发动机运转时上部发生“咯嘈”的响声，并且气门小头和摇青接触部位磨损严重，观察发现此都位润滑油较少，造成机车不能正常工作．拆下擂青轴检查：油孔畅通，抽去凸轮轴用机油枪向机作油孔处压油，在第一道凸轮轴套处也来油 A Dongfanghong a tractor 802, found in the use of the valve gap constant change, the engine when the upper part of the “slightly noisy” sound, and the valve head and shake the contact area of ​​serious wear and tear, observed that this bit less lubricant , Resulting in the locomotive can not work properly. Remove the green shaft check: smooth hole, pumping camshaft with a machine gun to the machine at the oil pressure at the first camshaft sleeve also come to oil