?如果泵輸出壓力下降過(guò)大而達(dá)不到用戶(hù)規(guī)定的壓力壓力時(shí)，則可能表示液壓泵的液壓泵故障或內(nèi)部液壓元件損壞或閥件損壞 檢查泵輸出壓力的方法是用氣泵或壓力開(kāi)關(guān)在泵的進(jìn)出口處進(jìn)行壓力檢測(cè)，其方法是把氣泵或壓力開(kāi)關(guān)置于出口管路上，將管路上的閥門(mén)關(guān)閉，以減少液壓泵出口壓力在管路內(nèi)形成的壓力差。
若有一根管道流過(guò)泵，而另一根管道未流過(guò)則說(shuō)明泵的液壓泵內(nèi)部液壓元件損壞；若只有一根管道流過(guò)進(jìn)口泵則說(shuō)明控制元件損壞對(duì)于泵的輸出壓力下降過(guò)大或達(dá)不到用戶(hù)規(guī)定壓力時(shí)均應(yīng)引起注意原因主要有：內(nèi)部元件損壞；壓力開(kāi)關(guān)關(guān)閉不嚴(yán)；閥門(mén)密封不嚴(yán)；液壓泵內(nèi)部零部件磨損；液壓閥件損傷、脫落；閥內(nèi)部元件間隙大；管路或閥外部磨損等。
檢查時(shí)應(yīng)盡量避免以上問(wèn)題的出現(xiàn) 5、液壓缸（閥）變形等原因會(huì)導(dǎo)致液壓元件的泄露，造成泄漏，因此必須及時(shí)檢修或更換 液壓缸（閥）在工作時(shí)，閥件受力情況復(fù)雜，極易變形或破裂當(dāng)活塞桿（或活塞桿）間有異物或卡死時(shí)，會(huì)使活塞桿（或活塞桿）與缸體（閥體）產(chǎn)生振動(dòng)或摩擦，從而使活塞桿（或活塞桿）泄漏，從而造成液壓系統(tǒng)泄漏。
因此，檢查液壓缸（閥）時(shí)應(yīng)重點(diǎn)檢查泄漏部位由于各部位漏油、磨損、裂紋等原因，造成液壓閥和活塞桿密封失效、動(dòng)作不良、泄漏嚴(yán)重時(shí)，就會(huì)造成液壓表失準(zhǔn)，或液壓缸（閥）失壓因此必須及時(shí)修理或更換 對(duì)液壓元件進(jìn)行檢查、檢測(cè) 對(duì)液壓元件進(jìn)行檢測(cè)，可通過(guò)查看元件表面狀態(tài)、油位、粘度、液壓缸壓力等參數(shù)來(lái)進(jìn)行初步判斷。
如果元件的工作環(huán)境溫度在20~30℃，油溫應(yīng)控制在20℃以下；如果油溫過(guò)高，應(yīng)及時(shí)停機(jī)檢查，待溫度下降后再安裝對(duì)液壓元件的測(cè)試方法：用肉眼或觸角觀察液壓元件的內(nèi)部和外部狀態(tài)；用氣棒檢測(cè)其是否有泄漏；檢查其內(nèi)部有無(wú)泄漏現(xiàn)象；用肉眼觀察液壓油的顏色、氣味以及其他液體的質(zhì)量指標(biāo)。
觀察是否正常等情況，以確認(rèn)是否有泄漏現(xiàn)象出現(xiàn)并根據(jù)這些情況在操作時(shí)注意安全問(wèn)題；防止損壞液壓元件要及時(shí)更換新油和清洗；注意觀察液壓元件的磨損情況，避免損壞液壓元件；當(dāng)發(fā)現(xiàn)異常時(shí)要及時(shí)處理并進(jìn)行修復(fù)更換對(duì)檢查后出現(xiàn)問(wèn)題要及時(shí)的處理并將故障消除以后進(jìn)行再次檢測(cè)，避免下次發(fā)生類(lèi)似問(wèn)題，造成不必要的損失和費(fèi)用浪費(fèi)，也要讓廣大客戶(hù)了解挖掘機(jī)的維修工作原理及質(zhì)量要求的過(guò)程中不會(huì)出現(xiàn)影響工作的因素和環(huán)節(jié)要多了解液壓元件的檢查方法和工作原理以及注意事項(xiàng)：如果機(jī)械出現(xiàn)故障的話，那就需要進(jìn)行維修了！ 90L130-KA-5-AB-80-R-3-F1-F-03-GBA-35-35-24 90L130KA5AB80R3F1F03GBA353524 90-L-130-KA-5-AB-80-R-3-F1-F-03-GBA-35-35-24 90L130KA5AB80R3F1F03GBA353524 90L130-KA-5-AB-80-R-3-F1-F-04-GBA-38-38-24 90L130KA5AB80R3F1F04GBA383824 90-L-130-KA-5-AB-80-R-3-F1-F-04-GBA-38-38-24 90L130KA5AB80R3F1F04GBA383824 90L130-KA-5-AB-80-R-3-F1-F-06-GBA-38-38-24 90L130KA5AB80R3F1F06GBA383824 90-L-130-KA-5-AB-80-R-3-F1-F-06-GBA-38-38-24 90L130KA5AB80R3F1F06GBA383824 90L130-KA-5-AB-80-R-3-F1-H-03-GBA-23-23-24 90L130KA5AB80R3F1H03GBA232324 90-L-130-KA-5-AB-80-R-3-F1-H-03-GBA-23-23-24 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90L130-KA-5-BC-80-S-3-C8-H-03-GBA-35-35-24 90L130KA5BC80S3C8H03GBA353524。
