The quality of the hydraulic oil in the hydraulic cylinder is very important. A better hydraulic oil contains antiseptics, which can increase the shelf life of the oil, but if it takes a long time, it needs to be replaced. Otherwise, the antiseptic in the hydraulic oil will fail. It will damage the function of the hydraulic machine. When replacing the hydraulic oil, the filter must be carefully cleaned, because the filter only filters out the dirt and dirt in the oil, and cannot filter other substances contained in the oil.
When the hydraulic oil needs to be replaced due to deterioration due to long use, some people mistakenly believe that it is only necessary to drain the oil in the hydraulic cylinder and fill up with new hydraulic oil. There are many hydraulic components on construction machinery, and sufficient hydraulic oil is required. However, there are still many old hydraulic oils left in the hydraulic oil pipes and hydraulic control valves at this time. The mixed use of new and old oils when the equipment is used will speed up the deterioration of the new oil.
The correct oil change procedure is to first drain the hydraulic oil in the hydraulic cylinder, clean the hydraulic cylinder and add new hydraulic oil, then remove the circuit header, start the engine and run at low speed to make the oil pump work, operate each mechanism separately, rely on hydraulic oil Drain the old oil in the circuit one by one until new oil flows out from the oil return main pipe, then connect the oil return main pipe to the oil tank, and add new hydraulic oil to the oil tank to the specified position.
Of course, this oil change also has its drawbacks. Let’s talk about the loader with pilot. When the oil is changed, the pilot oil pressure is 35 kg at idling speed. The pilot oil (that is, the newly changed oil) will arrive at the engine. The oil return pipe is not enough to prepare 3 large barrels of hydraulic oil. In addition, there is not only one oil return pipe, which needs to be removed one by one, which is very troublesome to do one by one....