一台挖掘机液压油箱所装的液压油是整机液压系统全部用油的1/2,余下的1/2液压油存储在液压泵、马达、多路阀、液压缸和各部的管路中。例如,一台挖掘机的液压系统所用的液压油为420L,而液压油箱的液压油是225L,余下的油液都存储在系统中。各种品牌的挖掘机其液压系统用油与油箱的容积比例基本上是一致的。在换油时,如果只更换油箱内的液压油,而不是将整机液压系统中的液压油全部更换,实际上是旧油勾兑新油,如果 The hydraulic oil in an excavator hydraulic tank is 1/2 of the total hydraulic system oil, and the remaining 1/2 hydraulic oil is stored in the hydraulic pump, motor, multi-way valve, hydraulic cylinder and each part of the pipeline . For example, an excavator's hydraulic system uses 420 liters of hydraulic fluid while the hydraulic reservoir contains 225 liters of hydraulic fluid and the remaining fluid is stored in the system. Various brands of excavators hydraulic system of oil and fuel tank volume ratio is basically the same. In the oil change, if only to replace the hydraulic oil tank, rather than the entire hydraulic system of hydraulic oil to replace all, in fact, the old oil blending new oil, if