一机手反映,他的小四轮拖拉机漏机油,开始时较轻,可是越堵越漏,而且漏油处越来越多。经检查,调压阀、机油泵均正常,更换所有漏油处的垫片,还是无济于事。最后发现曲轴室通气孔被堵塞。原来该机手发现曲轴室通气孔处有时排机油,就用垫将其堵住。通气孔堵住后,曲轴室内压力增高,一部分机油随高压气体从各个缝隙、油封处渗漏出来,还有一部分流入气缸内燃烧掉,造成机油过量消耗。疏通通气孔后 A machine hand reflects his small four-wheel tractor leak oil, the beginning lighter, but the more the more the more the more leakage, and more and more oil spills. After inspection, pressure regulator, oil pump are normal, replace all the oil spill at the gasket, or useless. The crankcase vent was finally blocked. It turned out that the crank of the crank chamber vent sometimes arrange oil, pad it to block. After the ventilation hole is closed, the pressure in the crank chamber increases. A part of the oil leaks out from the gaps and seals at high pressure, and a part of the oil flows into the cylinder to burn off, resulting in excessive oil consumption. After clearing the vent