The correct procedure for replacing the hydraulic oil in the hydraulic cylinder
When the hydraulic oil needs to be replaced due to excessive use of the time, some people mistakenly believe that it is necessary to discharge the oil in the hydraulic cylinder and fill up the 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 remaining in the hydraulic oil pipe and the hydraulic control valve. When the equipment is used, the mixing of new and old oils will speed up the deterioration of the new oil.
The correct oil change step should first release the hydraulic oil in the hydraulic cylinder, clean the hydraulic cylinder and add new hydraulic oil, then remove the circuit main pipe, start the engine and run at low speed, make the oil pump work, operate the mechanism separately, rely on hydraulic oil Discharge the old oil in the circuit one by one until the return oil main pipe has new oil flowing out. Connect the oil return main pipe to the fuel tank and add new hydraulic oil to the specified position in the fuel tank.
This oil change also has its drawbacks. It is said to have a pilot loader. When the oil is idling, the pilot oil pressure will be 35 kilograms. Just the engine, the pilot oil (that is, the new oil) will go to the oil return pipe. It is not necessarily enough to prepare 3 large barrels of hydraulic oil. In addition, there is not only one return pipe, which needs to be removed one by one, so it is very troublesome to do it one by one.