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1.出油阀座与紧座间密封垫圈损坏引起发动机不能起动我县西坡村新购一台泰山-12型拖拉机,使用几天后发现有时有断火现象,进而不能发动。为此,来县农机局请求排除故障。在车上检查喷油嘴时,发现喷油无力,且有严重后滴现象,初步判断为喷油泵故障。经拆检,发现是出油阀座与出油阀紧座之间的密封垫圈破碎为三块。该垫圈损坏后,破坏了出油阀座底面与柱塞套上端面间的密封,使两端面不能严密贴合,柱塞泵油时,部分高压柴油经此间隙泄漏,造成喷油压力下降,达不到喷油器的标定喷油压力(120±
1 out of oil valve seat and tight seat gasket between the damage caused by the engine can not start Xipo Village, I County, the new purchase of a Taishan -12 tractor, found after a few days and sometimes there is off the fire phenomenon, and then can not start. To this end, the county agricultural bureau to request troubleshooting. In the car to check the nozzle, found that fuel injection weakness, and the phenomenon of serious after the drop, initially judged as fuel pump failure. After dismantling, it was found that the sealing gasket between the oil valve seat and the oil valve seat was broken into three pieces. After the gasket is damaged, the seal between the bottom surface of the oil outlet seat and the upper end surface of the plunger sleeve is damaged, so that the two end surfaces can not tightly fit. When the plunger oil is pumped, part of the high pressure diesel oil leaks through the gap, causing the injection pressure to drop, Can not reach the injector injection pressure (120 ±