?由于柱塞密封圈老化或回位而引起的故障：一般由于油道堵塞、油質(zhì)過濃、潤滑油不清潔或雜質(zhì)太多等原因引起，若這種故障長期沒有得到解決，則必須更換機(jī)油，但此時(shí)油量必須充足另外，油量不足時(shí)，有時(shí)會出現(xiàn)柱塞回壓不正?，F(xiàn)象（油泵吸油),這時(shí)應(yīng)檢查柱塞密封面上是否積油、銹蝕脫落等情況。
如果密封面上積油過多影響傳熱，甚至造成軸承燒壞，這時(shí)應(yīng)將其清除或更換新潤滑油；如果柱塞密封面上積液較多，此時(shí)應(yīng)采用高溫高壓吹掃的方法清理，直到清理干凈為止；如果軸瓦和連桿軸頸磨損嚴(yán)重，必須更換軸瓦；如果是軸瓦中間部分發(fā)生斷裂后，應(yīng)更換連桿；如果是連桿磨損引起柱塞回壓不均而引起的故障：如果是油封上有銹跡堵塞時(shí)，應(yīng)徹底清洗油封或更換新油封；如果是油管彎曲或脫落時(shí)引起的故障：如果是油封處有異物堵塞時(shí)，應(yīng)徹底清除異物；如果是密封墊老化或損壞造成的故障：若密封墊已斷裂時(shí)，應(yīng)重新更換損壞密封墊；如果密封墊之間還存在空隙時(shí)，應(yīng)重新調(diào)整間隙；如果密封墊損壞或泄漏引起的故障：必須更換密封墊；如果軸承室和連桿軸頸間有泄漏導(dǎo)致柱塞回位而引起系統(tǒng)運(yùn)轉(zhuǎn)不穩(wěn)時(shí)，應(yīng)更換密封墊；如果軸瓦和連桿軸頸之間有破損或泄漏引起了系統(tǒng)運(yùn)轉(zhuǎn)不穩(wěn)時(shí)，應(yīng)更換軸瓦和連桿軸頸。
檢查液壓油的溫度、壓力、油液的污染、油質(zhì)等情況是否正常，并檢查各接頭是否松動(dòng)，是否有雜物堵塞或漏出，各接頭是否有滲油情況、各密封圈是否有損壞、各壓力表是否正常若液壓油過臟或油液污染嚴(yán)重時(shí)應(yīng)更換液壓油；若活塞卡滯導(dǎo)致液壓油無法流入油缸，應(yīng)清洗活塞桿，更換活塞；如果泵內(nèi)充滿液體或氣體，應(yīng)拆下泵蓋進(jìn)行檢查，防止油液進(jìn)入泵內(nèi)。
90-L-100-KT-1-BC-60-P-3-T2-E-03-GBA-32-32-24 90L100KT1BC60P3T2E03GBA323224 90-L-100-KT-1-BC-60-P-3-T2-E-03-GBA-35-35-24 90L100KT1BC60P3T2E03GBA353524 90-L-100-KT-1-BC-80-L-4-S1-F-03-GBA-40-40-20 90L100KT1BC80L4S1F03GBA404020 90-L-100-KT-1-BC-80-P-3-F1-E-03-GBA-35-35-24 90L100KT1BC80P3F1E03GBA353524 90-L-100-KT-1-BC-80-P-3-F1-E-03-GBA-38-38-24 90L100KT1BC80P3F1E03GBA383824 90-L-100-KT-1-BC-80-P-3-F1-E-03-GBA-45-45-24 90L100KT1BC80P3F1E03GBA454524 90-L-100-KT-1-BC-80-R-3-F1-E-03-GBA-38-38-24 90L100KT1BC80R3F1E03GBA383824 90-L-100-KT-1-BC-80-R-3-F1-E-03-GBA-45-45-24 90L100KT1BC80R3F1E03GBA454524 90-L-100-KT-1-BC-80-R-3-F1-F-03-GBA-42-42-24 90L100KT1BC80R3F1F03GBA424224 90-L-100-KT-1-CD-80-L-3-C7-F-00-GBA-42-42-28 90L100KT1CD80L3C7F00GBA424228 90L100-KT-1-CD-80-R-3-C6-F-03-GBA-42-42-24 90L100KT1CD80R3C6F03GBA424224 90-L-100-KT-1-CD-80-R-3-C6-F-03-GBA-42-42-24 90L100KT1CD80R3C6F03GBA424224 90-L-100-KT-1-CD-80-R-3-F1-E-03-GBA-42-42-24 90L100KT1CD80R3F1E03GBA424224 90-L-100-KT-1-CD-80-S-3-C7-F-00-GBA-42-38-28 90L100KT1CD80S3C7F00GBA423828 90-L-100-KT-1-CD-80-S-3-S1-E-03-GBA-42-42-24 90L100KT1CD80S3S1E03GBA424224 90-L-100-KT-1-CD-80-S-3-S1-E-05-GBA-42-42-24 90L100KT1CD80S3S1E05GBA424224 90-L-100-KT-1-NN-60-P-4-S1-F-03-GBA-35-35-24 90L100KT1NN60P4S1F03GBA353524 90-L-100-KT-1-NN-60-R-3-S1-F-06-GBA-14-14-20 90L100KT1NN60R3S1F06GBA141420 90-L-100-KT-1-NN-60-R-3-S1-F-06-GBA-35-35-20 90L100KT1NN60R3S1F06GBA353520 90-L-100-KT-1-NN-80-L-3-S1-E-03-GBA-17-32-24 90L100KT1NN80L3S1E03GBA173224 90-L-100-KT-1-NN-80-L-4-S1-F-03-GBA-40-40-20 90L100KT1NN80L4S1F03GBA404020 90L100-KT-1-NN-80-R-3-C6-F-03-GBA-42-42-26 90L100KT1NN80R3C6F03GBA424226 90-L-100-KT-1-NN-80-R-3-C6-F-03-GBA-42-42-26 90L100KT1NN80R3C6F03GBA424226 90-L-100-KT-1-NN-80-S-3-C7-F-00-GBA-42-38-28 90L100KT1NN80S3C7F00GBA423828 90-L-100-KT-1-NN-80-S-3-S1-E-03-GBA-42-42-24 90L100KT1NN80S3S1E03GBA424224 90-L-100-KT-1-NN-80-S-3-S1-E-05-GBA-42-42-24 90L100KT1NN80S3S1E05GBA424224 90-L-100-KT-2-AB-60-P-3-S1-E-03-GBA-35-35-24 90L100KT2AB60P3S1E03GBA353524 90-L-100-KT-2-AB-60-R-4-S1-E-03-GBA-35-35-24 90L100KT2AB60R4S1E03GBA353524 90L100-KT-2-AB-60-R-4-S1-E-03-GBA-35-35-24 90L100KT2AB60R4S1E03GBA353524 90-L-100-KT-2-AB-80-P-4-S1-F-00-GBA-32-32-24 90L100KT2AB80P4S1F00GBA323224 90-L-100-KT-2-CD-60-P-3-F1-E-03-GBA-35-35-24 90L100KT2CD60P3F1E03GBA353524 90-L-100-KT-2-CD-60-R-4-F1-E-03-GBA-35-35-24 90L100KT2CD60R4F1E03GBA353524 90L100-KT-2-CD-60-R-4-F1-E-03-GBA-35-35-24 90L100KT2CD60R4F1E03GBA353524 90-L-100-KT-2-CD-80-P-4-F1-F-00-GBA-32-32-24 90L100KT2CD80P4F1F00GBA323224 90-L-100-KT-5-AB-80-P-4-S1-F-00-GBA-32-32-24 90L100KT5AB80P4S1F00GBA323224 90-L-100-KT-5-BC-80-P-3-S1-F-03-GBA-38-38-24 90L100KT5BC80P3S1F03GBA383824 90-L-100-KT-5-BC-80-P-3-T2-E-03-GBA-38-38-20 90L100KT5BC80P3T2E03GBA383820 90-L-100-KT-5-BC-80-R-3-S1-F-03-GBA-35-35-24 90L100KT5BC80R3S1F03GBA353524 90-L-100-KT-5-CD-80-P-3-T2-F-03-GBA-38-38-24 90L100KT5CD80P3T2F03GBA383824 90-L-100-KT-5-CD-80-P-4-F1-F-00-GBA-32-32-24 90L100KT5CD80P4F1F00GBA323224 90-L-100-KT-5-NN-80-P-3-S1-F-03-GBA-35-35-24 90L100KT5NN80P3S1F03GBA353524 90-L-100-KT-5-NN-80-P-4-S1-F-00-GBA-32-32-24 90L100KT5NN80P4S1F00GBA323224。
