How to Properly Use Hydraulic Oil for Different Hydraulic Systems, according to some statistics, the causes of hydraulic system failures include:70％~85%Due to contamination and deterioration of hydraulic oil. Since the various pump and valve components used in the hydraulic system have high mating surfaces and tight tolerances, some components even feature orifices and gap-type control valve openings. If impurities are mixed into the oil, they will block these gaps and small holes, impeding the movement of the oil and disrupting the normal operation of the hydraulic components. Maintaining the cleanliness of both the hydraulic system and the hydraulic oil is crucial for system maintenance. The hazards of oil contamination to the system include:

（1Component contamination and wear

Various pollutants in the oil can cause a variety of wear on components, with solid particles entering the gaps of moving parts, resulting in cutting or fatigue wear on the surface of the parts. Additionally, air ingestion in the system's oil leads to cavitation, causing erosion and damage to the surface of the components.

（2Component blockage and jamming issues

Solid particle blockages in the gaps and orifices of hydraulic valves cause valve cores to become obstructed and jammed, affecting operational performance.

Water and air in the lubricating oil, primarily due to their thermal energy, are key conditions for the oxygen in the oil. Additionally, metallic particles in the oil play a significant catalytic role in the oxygen content. Moreover, the presence of water and suspended bubbles in the oil significantly reduces the strength of the oil film between moving parts, leading to a decrease in lubrication performance. To address this, consider the following:

（1Follow the instructions provided for selecting the appropriate hydraulic oil.

（2Utilizing a sealed fuel tank, an air filter with certain precision is installed at the inlet of the tank.

（3During use, prevent moisture, emulsions, dust fibers, other mechanical debris, and other foreign matter.

（4Ensure the hydraulic oil level is appropriate. The oil level in the hydraulic oil tank should be maintained within the specified range after the system piping and components are filled with oil.

（5Components, piping, and systems must be rigorously cleaned prior to use.

（6Fuel must be strictly filtered during refueling.

（7Regularly inspect the quality of hydraulic oil to maintain its cleanliness.

（8When changing hydraulic oil, be sure to do so immediately after the machinery has been in operation, while the hydraulic oil is still warm, to facilitate the removal of mechanical impurities and oil污.

（9Properly Clean Hydraulic Systems.

To prevent the hydraulic system from introducing air, the entry of air into the hydraulic system can cause emulsification of the hydraulic oil, which damages the fluid's performance. Consequently, the hydraulic actuator may exhibit phenomena such as sudden stops and starts, slow speed, and insufficient force during operation. This type of occurrence is commonly referred to as“Work Crawl”This phenomenon not only disrupts the stability of system operations but also generates noise. Specific methods are as follows:

（1Ensure proper sealing at the drive shaft ends of oil-absorbing pipelines and pumps, etc., where the pressure is below atmospheric, to prevent any gas leakage.

（2To prevent oil return pipe from picking up air when reattaching, do not touch the surface of the oil return pipe.

（3If air has entered the system, it should be promptly identified and the leaky areas addressed for elimination, and the air in the system should be evacuated.

（4After adding new oil, the work unit should be continuously manipulated for lifting, lowering, and flipping to expel air from the system and correctly execute the operational procedures.

During excavation, rotation, lifting, and other operational tasks, movements should be smooth and accurate, with timely control lever adjustments to avoid rapid movements. This prevents sudden opening or closing of the hydraulic cylinder and hydraulic motor exhaust ports, which can cause shock. Strengthen daily maintenance and care for the hydraulic system.