1.动臂举升慢此故障是该机液压系统最常见的故障之一,其表现为:无论空载还是满载,怠速状态下操纵手柄在举升位置不起铲,加大油门举升慢。综合分析主要有以下原因:(1)工作泵磨损,压力和流量降低;(2)多路阀上的安全阀调压低或密封不严;(3)先导泵磨损,压力和流量降低;(4)先导泵安全阀调压低或密封不严;(5)先导阀计量阀芯有赃物堵塞或发卡; 1. Boom lift slow The fault is one of the most common hydraulic system failure, its performance is: no-load or full load, idle position can not afford to lift the handle position shovel, increase the throttle lift slow . Comprehensive analysis of the main reasons for the following: (1) working pump wear and tear, pressure and flow reduction; (2) multi-valve safety valve on the low pressure regulator or lax; (3) pilot pump wear, pressure and flow reduction; ( 4) Pilot pump safety valve low pressure or lax sealing; (5) Pilot valve metering spool blockage or hairpin;