CB系列液压油泵的轴套、密封胶圈及自紧油封在工作中连续损坏,当更换胶圈、油封甚至轴套仍无法排除故障时,就应该从油泵外部寻找原因了。外部原因一般有两个:一是有的机手因传动爪形联轴器易脱离,而将联轴器的主、从动部分焊成一个整体,而两联轴花键套同轴度又 CB series of hydraulic pump bushings, sealing apron and self-tight seal continuous damage in the work, when the replacement apron, oil seal and even the sleeve can not be ruled out the fault, you should look for reasons from outside the pump. There are generally two external reasons: First, some of the hands due to transmission claw coupling easy to detach, and the coupling of the main and driven part of the welding into a whole, and the two coaxial coupling spline sleeve and