一辆詹阳W4-60C型单斗全回转轮胎式液压挖掘机,采用正、反通用铲斗,转向和挖掘作业均由液压传动完成,正常作业时发现动臂工作无力。经检查,未发现液压油管破裂或漏油现象,而且操纵铲斗的先导阀时铲斗液压缸工作正常,仅发现动臂动作缓慢,其他装置未见异常。 A Zhanyang W4-60C single-bucket all-wheel hydraulic excavator, using positive and negative general bucket, steering and excavation operations are completed by the hydraulic transmission, normal work found jib work weakness. After inspection, hydraulic hose rupture or oil spill was not found, and bucket hydraulic cylinder when operating the pilot valve is working properly, only to find slow boom movement, other devices without exception.