When using parts and components of excavator, the phenomenon of wear and failure caused by frequent use for a long time, and the friends driven by excavator must have a full understanding of these phenomena and targeted solutions. However, little is known about the problem of unknown impurities in the use of machinery. For example, there is white liquid in the digging cylinder. What is this white liquid?

　　事实上，液压油在水中会变成乳白色，如果水箱也有这种情况需要清理液压系统，更换液压油。挖掘机更换液压油时，需要将油箱内的液压油全部释放出来，将液压滤芯取出，将泵与油箱之间的管路从泵接头断开，将管路内的油释放出来。用洗油冲洗液压缸和管路。用医用布擦拭液压缸内部。将面粉揉三次拉丝面，然后用面团清洁液压油箱内部，特别是油箱角落和滤芯。液压缸和滤芯要完全清洁。更换新的液压滤芯，更换盖板。

　　In fact, the hydraulic oil will turn milky white in the water. If the water tank also has this situation, it needs to clean the hydraulic system and replace the hydraulic oil. When the excavator changes the hydraulic oil, it is necessary to release all the hydraulic oil in the tank, take out the hydraulic filter element, disconnect the pipeline between the pump and the tank from the pump connector, and release the oil in the pipeline. Wash the hydraulic cylinder and pipeline with washing oil. Wipe the inside of the hydraulic cylinder with a medical cloth. Knead the flour three times to the drawing surface, and then clean the inside of the hydraulic oil tank with dough, especially the corner of the oil tank and the filter element. The hydraulic cylinder and filter element shall be completely clean. Replace the hydraulic filter element and cover plate.

　　挖掘机的液压活塞泵冲洗油口,开口拒绝油,液压油的泵壳发布螺杆泵在下面的油塞,从泵到泵油口壳上面充满了油,然后打开泵油塞下面,释放洗油的泵壳,反复洗几次,残油的泵泵壳后吹干净,满干净的液压油,油塞紧。

　　The hydraulic piston pump of the excavator flushes the oil port and the opening rejects the oil. The pump housing of the hydraulic oil releases the screw pump to the oil plug below. The pump housing from the pump to the pump oil port is filled with oil. Then open the pump oil plug below, release the pump housing of the flushing oil, wash it repeatedly several times. The pump housing of the residual oil is dried after blowing, full of clean hydraulic oil, and the oil plug is tight.

　　油缸变色现象不仅有白色这种特征，还有黑色和紫色等现象，了解变色的原因，及时更换液压油即可恢复正常。

　　The discoloration of oil cylinder not only has the characteristics of white, but also has the phenomena of black and purple. Understand the causes of discoloration, and replace the hydraulic oil in time to return to normal.