Excavator Hydraulic System Troubleshooting

The hydraulic system is the core component of the excavator, which works to control the transmission shift, fan cooling, boom floating, pilot oil source, and various attachment. The failure of the hydraulic system is generally caused by the high temperature of the hydraulic oil or the entry of air. For the occurrence of these faults, MyMRO provides some corresponding countermeasures that could be taken to solve them.

To solve a problem, you must first analyze it. The decrease in the viscosity of hydraulic oil will cause the machinery unable to work normally, and even lead to a great increase in frictional resistance. The hydraulic valve will be stuck, and the material of the seal will deteriorate, causing the hydraulic system to leak. The reason for the above consequences may be that the oil tank does not have good heat dissipation performance, so the temperature of the oil in the tank will rise. In this case, the oil tank with a large volume should be replaced to carry it, so as to make the oil more stable. You can also choose to install a cooling device.

The hydraulic oil does not meet the quality standards or the operator mixes various types of hydraulic oil, may greatly increase the viscosity of the oil and causes the machine to malfunction. Therefore, the selection of hydraulic oil should be strictly in accordance with the specificationsIf the environment on the construction site is harsh, it is easy to mix some impurities and pollutants into the oil as the machine runs faster. When contaminated, the hydraulic oil enters the gap between the pump and the motor, which will seriously damage the smoothness of the surface, cause leakage, and increase the oil temperature. Faced with these problems, the environment should be purified so as to avoid obstacles.

Air will also have a certain impact on the hydraulic oil of the excavator. When air enters the oil, cavitation will occur. The metal sealing material will be damaged, and even noise will occur, which will destroy the stability of the hydraulic system.

The reason for the above obstacles may be that the joints are not fastened well, causing sealing problems and allowing air to enter. Generally speaking, the hydraulic system must have good sealing performance, especially the key position of the interface. Only by fixing the interface can the oil tank be sealed well, so as to prevent the air from entering the system and causing damage to the system.

Another situation is that the suction line in the hydraulic system and the line connecting the system have been damaged for some reason, perhaps worn through or corroded, which has led to the entry of air. This reason occurs because its pipeline layout design does not meet the specifications and actual needs, so if you want to solve this kind of failure, you must always clean and maintain the pipeline to reduce external corrosion and prevent air from entering .

The last reason for the entry of air into the hydraulic system may be that air bubbles were accidentally brought into the fuel tank during refueling and mixed into the system. In actual operation, this must be avoided. The operator must maintain a stable working state when refueling, so as to ensure the safe operation of the hydraulic system.