(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。9510390089AZ-P-N-12-028-RPR12MA9510390090AZ-P-N-12-032-RPR12MA9510390091AZ-P-N-12-036-RPR12MA9510390092AZ-P-N-12-020-LPR12MA9510390093AZ-P-N-12-022-LPR12MA9510390094AZ-P-N-12-025-LPR12MA9510390095AZ-P-N-12-028-LPR12MA9510390096AZ-P-N-12-032-LPR12MA9510390097AZ-P-N-12-036-LPR12MA9510390098AZ-P-N-12-020-RPC12MA9510390099AZ-P-N-12-022-RPC12MA9510390100AZ-P-N-12-025-RPC12MA9510390101AZ-P-N-12-028-RPC12MA9510390102AZ-P-N-12-032-RPC12MA9510390103AZ-P-N-12-036-RPC12MA9510390104AZ-P-N-12-020-LPC12MA9510390105AZ-P-N-12-022-LPC12MA9510390106AZ-P-N-12-025-LPC12MA)