?1、機(jī)器故障的類型及原因 機(jī)械故障預(yù)防和故障診斷兩個部分在預(yù)防上：主要是對機(jī)件做好日常的保養(yǎng)，比如每天都要做保養(yǎng)，以及對機(jī)械進(jìn)行定期維護(hù)等；在診斷上：主要是根據(jù)故障所表現(xiàn)出來的形式來進(jìn)行判斷；在排除故障上：主要是對機(jī)器的內(nèi)部部件進(jìn)行細(xì)致檢測等。
2、判斷挖掘機(jī)液壓系統(tǒng)故障與失效的原因 液壓系統(tǒng)故障與失效的原因是復(fù)雜多變的，而主要的分析判斷依據(jù)是：液壓缸內(nèi)部各缸孔之間的間隙和密封件間的間隙及其相互配合位置、閥件位置以及密封件工作條件等要對液壓系統(tǒng)故障與失效進(jìn)行判斷，首先要確定內(nèi)部的故障。
由于挖掘機(jī)液壓系統(tǒng)工作中受到很多因素地影響，其內(nèi)部都有可能會出現(xiàn)故障，因此就需要了解液壓系統(tǒng)故障與失效的原因，對各個可能造成故障和失效的部位和原因進(jìn)行檢查、檢測與分析 3、通過診斷液壓系統(tǒng)故障引起的故障 液壓系統(tǒng)中若出現(xiàn)了大量的油液流量過小、壓力過低或過高、泵出現(xiàn)堵塞或泵芯、閥芯有異物磨損等現(xiàn)象時，則應(yīng)檢查其液壓系統(tǒng)中是否存在液壓油變質(zhì)、油中混入雜質(zhì)、系統(tǒng)中有污物、系統(tǒng)管路或元件出現(xiàn)損壞等情況，若有這些現(xiàn)象，則可根據(jù)系統(tǒng)的故障程度來判斷故障發(fā)生的部位和程度。
若有液壓系統(tǒng)中沒有出現(xiàn)類似的問題，則可直接用儀表對其進(jìn)行監(jiān)控；若有多個液壓系統(tǒng)中只有一個出現(xiàn)故障并排除后，則可先用其他儀表觀察故障若是這些油液的流量過小或過高等現(xiàn)象，則可能是液壓系統(tǒng)本身存在故障；如果液壓系統(tǒng)中的油液流動很正常并無異?，F(xiàn)象，但在某一時刻突然出現(xiàn)流量過大或過小等現(xiàn)象時就需引起注意了。
4、維修策略及流程 在我國，對于挖掘機(jī)維修的整個流程一般分為技術(shù)指導(dǎo)、現(xiàn)場檢查、故障排除、維修總結(jié)5個步驟但是由于我國的發(fā)展程度不同，采取不同的維修策略，所以對于挖掘機(jī)的維修整個流程要有一定的變化技術(shù)指導(dǎo)：技術(shù)指導(dǎo)的原則是：先現(xiàn)場檢查，再檢修，最后再維修，保證故障發(fā)生時，能夠快速、準(zhǔn)確地找到故障原因并及時處理，使機(jī)械能夠正常工作。
5、其他輔助措施 在修理挖掘機(jī)時，應(yīng)選用質(zhì)量可靠的原廠零部件，而且修理前應(yīng)根據(jù)工程要求進(jìn)行試車，試驗確定是否合格，必要時進(jìn)行加工，如有不合格應(yīng)當(dāng)及時進(jìn)行整改修理完成后，應(yīng)經(jīng)過試運轉(zhuǎn)、檢測及確認(rèn)無誤后方可出廠合格。
禁止修理人員私自拆改總成、拆換零件、拆卸電器部件及操作電器設(shè)備修理過程中，應(yīng)嚴(yán)格遵守操作規(guī)程和技術(shù)標(biāo)準(zhǔn)同時要注意觀察、注意安全以及工程質(zhì)量問題 90-L-130-KA-5-BC-80-S-3-C8-H-03-GBA-35-35-24 90L130KA5BC80S3C8H03GBA353524 90-L-130-KA-5-BC-80-S-3-C8-H-03-GBA-38-38-26 90L130KA5BC80S3C8H03GBA383826 90L130-KA-5-BC-80-S-3-C8-H-03-GBA-42-42-24 90L130KA5BC80S3C8H03GBA424224 90-L-130-KA-5-BC-80-S-3-C8-H-03-GBA-42-42-24 90L130KA5BC80S3C8H03GBA424224 90L130-KA-5-BC-80-S-3-C8-H-03-GBA-42-42-28 90L130KA5BC80S3C8H03GBA424228 90-L-130-KA-5-BC-80-S-3-C8-H-03-GBA-42-42-28 90L130KA5BC80S3C8H03GBA424228 90L130-KA-5-BC-80-S-3-C8-H-03-GBA-42-42-30 90L130KA5BC80S3C8H03GBA424230 90-L-130-KA-5-BC-80-S-3-C8-H-03-GBA-42-42-30 90L130KA5BC80S3C8H03GBA424230 90L130-KA-5-BC-80-S-3-C8-H-04-GBA-35-35-24 90L130KA5BC80S3C8H04GBA353524 90-L-130-KA-5-BC-80-S-3-C8-H-04-GBA-35-35-24 90L130KA5BC80S3C8H04GBA353524 90L130-KA-5-BC-80-S-3-C8-H-04-GBA-38-38-24 90L130KA5BC80S3C8H04GBA383824 90-L-130-KA-5-BC-80-S-3-C8-H-04-GBA-38-38-24 90L130KA5BC80S3C8H04GBA383824 90L130-KA-5-BC-80-S-3-F1-H-00-GBA-38-23-30 90L130KA5BC80S3F1H00GBA382330 90-L-130-KA-5-BC-80-S-3-F1-H-00-GBA-38-23-30 90L130KA5BC80S3F1H00GBA382330 90L130-KA-5-BC-80-S-4-C8-H-03-GBA-35-35-24 90L130KA5BC80S4C8H03GBA353524 90-L-130-KA-5-BC-80-S-4-C8-H-03-GBA-35-35-24 90L130KA5BC80S4C8H03GBA353524 90L130-KA-5-BC-80-S-4-C8-H-04-GBA-32-32-28 90L130KA5BC80S4C8H04GBA323228 90-L-130-KA-5-BC-80-S-4-C8-H-04-GBA-32-32-28 90L130KA5BC80S4C8H04GBA323228 90-L-130-KA-5-CD-80-D-3-C8-L-03-GBA-42-42-24 90L130KA5CD80D3C8L03GBA424224 90L130-KA-5-CD-80-D-4-F1-L-05-GBA-35-35-24 90L130KA5CD80D4F1L05GBA353524 90-L-130-KA-5-CD-80-D-4-F1-L-05-GBA-35-35-24 90L130KA5CD80D4F1L05GBA353524 90L130-KA-5-CD-80-L-3-C8-H-03-GBA-42-42-28 90L130KA5CD80L3C8H03GBA424228 90-L-130-KA-5-CD-80-L-3-C8-H-03-GBA-42-42-28 90L130KA5CD80L3C8H03GBA424228 90L130-KA-5-CD-80-L-3-F1-H-03-GBA-42-42-28 90L130KA5CD80L3F1H03GBA424228 90-L-130-KA-5-CD-80-L-3-F1-H-03-GBA-42-42-28 90L130KA5CD80L3F1H03GBA424228 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90-L-130-KA-5-CD-80-R-3-F1-H-03-GBA-35-35-24 90L130KA5CD80R3F1H03GBA353524 90L130-KA-5-CD-80-R-4-F1-F-03-GBA-35-35-24 90L130KA5CD80R4F1F03GBA353524 90-L-130-KA-5-CD-80-R-4-F1-F-03-GBA-35-35-24 90L130KA5CD80R4F1F03GBA353524 90L130-KA-5-CD-80-S-3-C8-F-03-GBA-42-42-24 90L130KA5CD80S3C8F03GBA424224 90-L-130-KA-5-CD-80-S-3-C8-F-03-GBA-42-42-24 90L130KA5CD80S3C8F03GBA424224 90L130-KA-5-CD-80-S-3-C8-H-03-GBA-26-26-24 90L130KA5CD80S3C8H03GBA262624 90-L-130-KA-5-CD-80-S-3-C8-H-03-GBA-26-26-24 90L130KA5CD80S3C8H03GBA262624 90L130-KA-5-CD-80-S-3-C8-H-03-GBA-26-26-28 90L130KA5CD80S3C8H03GBA262628 90-L-130-KA-5-CD-80-S-3-C8-H-03-GBA-26-26-28 90L130KA5CD80S3C8H03GBA262628 90L130-KA-5-CD-80-S-3-C8-H-03-GBA-35-35-26 90L130KA5CD80S3C8H03GBA353526 90-L-130-KA-5-CD-80-S-3-C8-H-03-GBA-35-35-26 90L130KA5CD80S3C8H03GBA353526 90L130-KA-5-CD-80-S-3-C8-H-03-GBA-35-35-28 90L130KA5CD80S3C8H03GBA353528 90-L-130-KA-5-CD-80-S-3-C8-H-03-GBA-35-35-28 90L130KA5CD80S3C8H03GBA353528 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