排除方法：旋转时吸入空气：泵体与泵盖间加入纸垫；泵体用金刚砂在平板上研磨，使泵体与泵盖垂直度误差不超过0.005mm，紧固泵体与泵盖的联结，不得有泄漏现象。故障原因：(14)泵的主动轴与电动机联轴器不同心，有扭曲摩擦：排除方法：调整泵与电动机联轴器的同心度，使其误差不超过0.2mm。故障原因：(15)泵齿轮的啮合精度不够：排除方法：对研齿轮达到齿轮啮合精度。故障原因：(16)泵轴的油封骨架脱落，泵体不密封：排除方法：更换合格泵轴油封。A4V7790HW-32L-MCPBA4V7G90HW-32L-MCPBA4VS0180-PR-3X/R-PPB13N00A4V90HD10L0C2020A4VG125HDDT1/32R-N2F-02F011SA4VS0250DFR/30R-PPB13N00A4VG92DA2D6/31L-P2F02F301SA4VSO40DFR/30R-PPB12N00A4VSO250DFR/30R-PPB13N00A4VSO125DR/10R-PPB13N00***G250HWD1/32R-N2D10F69A4VSH71MA/10LPPB02N000NA4VS0180-DR-3X/R-PPB13N00A4VS0125DR/22R-PPB12N00A4VS0125DR/10RPPB13N00A4VS071DR/10RPPB13N00A4VS040DR/10RPPB13N00A4VG56EP2DT1/32R-NAF02F011SA4VSO250DR/22R-VPB13NOOA4VS0100DR/22R-PPB13N00)