故障原因：(9)“左旋”装“右旋”油泵，造成冲坏骨架油封；排除方法：“右旋”泵不能装“左旋”机上，否则会冲坏骨架油封；故障原因：(10)液压油过脏。排除方法：清洗系统，更换液压油。故障原因：(11)泵的过滤器被污物阻塞不能起滤油作用排除方法：用干净的清洗油将过滤器去除污物。故障原因：(12)油位不足，吸油位置太高，吸油管露出油面：排除方法：加油到油标位，降低吸油位置。故障原因：(13)泵体与泵盖的两侧没有加纸垫；泵体与泵盖不垂直密封：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。R918C02771AZPGG-12-028/028LDC2020MBR918C02740AZPNF-11-032/014LDC0720KB-S0023R918C02614AZPNF-11-022/008RDC720KB-S0023R918C02598AZPNN-11-025/022RDC77KB-S0023R918C02594AZPNF-11-032/016RDC720KB-S0023R918C02591AZPNF-11-032/008RDC720KB-S0023R918C02478AZPF-10-022RSG20PB-S0012R918C02445AZPG-11-038LDC7KB-S0023R918C02440AZPN-11-025LDC7KB-S0023R918C02383AZPF-22-022LRR20MBR918C02381AZPF-21-022LFB20MBR918C02310AZPF-22-022RHO30KBR918C02301AZPG-11-038RDC7KB-S0023R918C02300AZPN-11-032RDC7KB-S0023R918C02298AZPN-11-028RDC7KB-S0023R918C02295AZPN-11-022RDC7KB-S0023R918C02293AZPF-11-022RRR20KB-S0023R918C02257AZPF-12-022RRR20KBR918C02248AZPG-11-038RQ***0MBR918C02246AZPG-11-032RQ***0MBR918C02215AZPN-11-025RCB20MBR918C02200AZPF-12-022RCB20KB)