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   小松挖掘機(ji)配件的液(ye)壓系統出現工作裝(zhuang)置、行走(zou)、回轉速度低或無力的故障(zhang)：PC閥(fa)調(diao)整(zheng)(zheng)不良；LS閥(fa)總(zong)成(cheng)不良；閥(fa)總(zong)成(cheng)損壞；減(jian)壓閥(fa)輸出回路液(ye)壓元件故障(zhang)；柱塞泵(beng)故障(zhang)；柱塞泵(beng)伺服(fu)活塞故障(zhang)；主(zhu)溢(yi)流閥(fa)調(diao)整(zheng)(zheng)不正確(que)；卸載(zai)閥(fa)動作不良；主(zhu)溢(yi)流閥(fa)損壞。  

   解決方法：1.調整(zheng)(zheng)或(huo)檢(jian)(jian)(jian)修(xiu)(xiu)(xiu)pc閥(fa)；2.檢(jian)(jian)(jian)查并修(xiu)(xiu)(xiu)理LS閥(fa)；3.檢(jian)(jian)(jian)修(xiu)(xiu)(xiu)PC閥(fa)；4.檢(jian)(jian)(jian)修(xiu)(xiu)(xiu)減(jian)(jian)壓(ya)閥(fa)輸(shu)出(chu)回(hui)路液壓(ya)元件或(huo)更換(huan)減(jian)(jian)壓(ya)閥(fa)輸(shu)出(chu)回(hui)路液壓(ya)元件；5.檢(jian)(jian)(jian)修(xiu)(xiu)(xiu)柱(zhu)塞(sai)(sai)泵；6.檢(jian)(jian)(jian)修(xiu)(xiu)(xiu)或(huo)更換(huan)柱(zhu)塞(sai)(sai)泵伺服(fu)活塞(sai)(sai)；7.重新調整(zheng)(zheng)主溢流閥(fa)；8.調整(zheng)(zheng)或(huo)檢(jian)(jian)(jian)修(xiu)(xiu)(xiu)卸載閥(fa)；9.檢(jian)(jian)(jian)修(xiu)(xiu)(xiu)主溢流閥(fa)。