b．液压元件选型不合理。动臂油缸规范为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。
    c．液压体系规划不合理。操作阀与全液压转向器为单泵串联，安全阀调定压力分16MPa，而液压泵的额外作业压力也为16MPa。液压泵经常在满负载或长时间超负荷（高压）状况下作业，而且体系有液力冲击，长时间不换油，液压油受污染，加重液压泵磨损，致使液压泵泵壳迸裂（后曾发现此类毛病）。

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PVL12-19-47-F-1R-UU-10    PVL12-23-47-F-1R-UU-10

PVL12-25-47-F-1R-UU-10    PVL12-28-47-F-1R-UU-10

PVL12-31-47-F-1R-UU-10

PVL12-6-53-F-1R-UU-10     PVL12-8-53-F-1R-UU-10

PVL12-10-53-F-1R-UU-10    PVL12-12-53-F-1R-UU-10

PVL12-14-53-F-1R-UU-10    PVL12-17-53-F-1R-UU-10

PVL12-19-53-F-1R-UU-10    PVL12-23-53-F-1R-UU-10

PVL12-25-53-F-1R-UU-10    PVL12-28-53-F-1R-UU-10

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PVL12-6-59-F-1R-UU-10     PVL12-8-59-F-1R-UU-10

PVL12-10-59-F-1R-UU-10    PVL12-12-59-F-1R-UU-10

PVL12-14-59-F-1R-UU-10    PVL12-17-59-F-1R-UU-10

PVL12-19-59-F-1R-UU-10    PVL12-23-59-F-1R-UU-10

PVL12-25-59-F-1R-UU-10    PVL12-28-59-F-1R-UU-10

PVL12-31-59-F-1R-UU-10

PVL12-6-65-F-1R-UU-10     PVL12-8-65-F-1R-UU-10

PVL12-10-65-F-1R-UU-10    PVL12-12-65-F-1R-UU-10

PVL12-14-65-F-1R-UU-10    PVL12-17-65-F-1R-UU-10

PVL12-19-65-F-1R-UU-10    PVL12-23-65-F-1R-UU-10

PVL12-25-65-F-1R-UU-10    PVL12-28-65-F-1R-UU-10