If the residual air in cylinder is impacted by abrupt clamp pressure the sealring will be damaged due to the effect of diesel oil.
如果油缸内残留空气受急剧夹压时，那么，由于液压油的作用，有可能使密封圈烧损。
2
Such as whether the bolt is tightened, the piston ring is installed correctly, damaged oilseal is replaced, etc.
譬如螺栓是否拧紧，活塞环安装是否正确，损坏油封是否更换等。
3
This paper introduces the cause of the seepage in valve box of oil isolation pump, and solves the problem of the valve box seepage by way of the improvement of die slot in O - ring and seal material.