轴向柱塞泵工作时压力表指针不稳定（1）配油盘与缸体或柱塞与缸体之间磨损严重，使其内泄漏和外泄漏过大。处理方法：检查、修复配油盘与缸体的配合面；单缸研配，更换柱塞；紧固各连接处螺钉，排除漏损。（2）进油管堵塞，吸油阻力变大及漏气等都有可能造成压力表指针不稳定。处理方法：进油管堵塞，液流阻力大，可疏通油路管道洗进口滤清器，检查并紧固进油管段的连接螺钉，排除漏气。力士乐AA4VSO系列柱塞泵常见型号及其订货号：R988007360AHA4VSO355DFR1/30R+AEA4VSO125DFR1R910999927AEA4VSO180DR/30R-PPB13N00R910999906AA4VSO180LR2/30R-PPB13N00R910999125AA4VSO180DR/30R-PPB13N00R910998825AEA4VSO125DR/30R-PPB13N00R910998645AA4VSO125DRG/30R-PPB13N00R910997977BUSHINGA4VSO125/180LR/30R910996123AA4VSO250EO2/30R-PPB13N00R910995112AHAA4VSO250FE1/30R-PSD63K07-SO859R910994684AA4VSO250DP/30R-PZB13N00R910994612AHAA4VSO250FE1/30R-PSD63K18-SO859R910994306AA4VSO125DR/30R-PPB13N00R910992547AA4VSO250HS/30R-PPB13N00R910988701AA4VSO250DR/30R-VPB13N00R910988390AA4VSO250DP/30R-VPB13N00R910988316AEA4VSO250DR/30R-PPB13N00R910986938AA4VSO250DR/30L-PPB13N00R910985855AA4VSO250LR3N/30R-PZB13N00R910985297AA4VSO250LR2/30R-PPB13N00)