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我县开山乡一台与碾米机配套的 S195柴油机,在维修保养时,更换了柱塞副,结果喷油泵不供油。经拆检柱塞副发现,新柱塞比原柱塞长2毫米。柱塞过长,柱塞上方容积减小,当柱塞向后移动时,移不到下止点,使柱塞套的进、回油孔关闭或少量开启,柱塞上方无燃油或进入少量燃油。当柱塞向前移动时,柱塞的行程缩短,形不成压力,致使无法供油。修复柱塞后,喷油泵工作正常了。
Open a mountain county and rice milling machines supporting the S195 diesel engine, maintenance, replacement of the plunger, the results of the fuel pump is not oil. After dismantling the plunger found that the new plunger longer than the original plunger 2 mm. The plunger is too long, the volume above the plunger is reduced, when the plunger moves backward, it can not move to the bottom dead center, so that the plunger sleeve into or out of the oil hole is closed or a small amount of open, no fuel on the plunger or into a small amount Fuel. When the plunger moves forward, the stroke of the plunger is shortened, forming no pressure, resulting in no oil supply. Repair plunger, the fuel pump is working properly.