通常来说，形成动臂带载不能提升的主要原因为：a.挖掘机液压泵严峻磨损。在低速作业时泵内走漏严峻;高速作业时，泵压力稍有进步，但因为泵的磨损及内泄，容积功率明显下降，很难到达额外压力。液压泵长时间作业又加重了磨损，油温升高，由此形成液压元件磨损及密封件的老化、损坏，丧失密封才能，液压油蜕变，***终致使毛病发作。b.液压元件选型不合理。动臂油缸规格为70/40非规范系列，密封件亦为非规范件，制形本钱高且密封件替换不方便。动臂油缸缸径小，必然使体系调定压力高。9510390090AZ-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-LPC12MA9510390107AZ-P-N-12-028-LPC12MA9510390108AZ-P-N-12-032-LPC12MA)