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）。R900HA5596ABHAG-0100RS/PGF2-006/112M/002F433AR900984300PGF2-2X/019LJ20VU2R900984277PGF2-2X/013LL20VMK-A385R900984264PGF3-3X/025LN20VM-A262R900984249PGF3-3X/032RS07VMR900984240PGF2-2X/016LL01VMR900984214PGF2-2X/006RL01VMK-A385R900984213PGF3-3X/032LJ07VU2R900984209PGF3-3X/025RE07VE4-A384R900984206PGF2-2X/016RA01VP2PGH4-2X/032RE11VU2力士乐REXROTH齿轮泵德国PGH齿轮泵rexroth齿轮泵力士乐***9510290331AZPF-12-025RPC12MB-SO5489510290332AZPF-12-028RPC12MB-SO5489510290333AZ-P-FF-12-019/014-RRR12MB-S00409510290334AZ-P-FF-12-014/014-RXC12MB-S03089510290335AZ-P-F-12-016-RPR12MV14015-S00439510290336AZ-P-F-12-016-LRR12KB9510290337AZPF-12-004LRR20KB-S00399510290338AZPF-12-005LRR20KB-S00399510290339AZ-P-F-12-008-LRR20KB)