(1)查看动臂油缸的内漏状况。***简略的办法是把动臂升起，看其是不是有显着的自在下降。若下落显着则拆开油缸查看，密封圈如已磨损应予替换。
(2)查看操作阀。首要清洁安全阀，查看阀芯是不是磨损，如磨损应替换。安全阀设备后若仍无变化，再查看操作阀阀芯磨损状况，其空隙运用极限通常为0.06mm,磨损严峻应替换。
(3)测量挖掘机液压泵的压力。若压力偏低，则进行调整，加压力仍调不上去，则说明液压泵严峻磨损。
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