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１．输油阀偶件的更换原则 输油阀偶件的磨损部位主要集中在密封锥面、减压凸缘和导向表面３个部位。 对清洗干净的输油阀偶件用肉眼和放大镜观察，有下列情况之一的，应成对地进行更换：输油阀的减压凸缘上有严重磨损；输油阀密封锥面磨损过多；锥面有金属剥落或深的纵向划痕
1. The principle of oil valve replacement parts Coupling parts of the oil valve wear parts mainly concentrated in the sealing cone, relief flange and the guide surface of the three parts. The clean oil valve coupling with the naked eye and magnifying glass observed, one of the following conditions, should be replaced in pairs: oil pressure relief valve flange has serious wear and tear; oil valve sealing cone worn over More; conical surface with metal flaking or deep scratches