Correct Operation Specifications For Filling Hydraulic Oil in Self Dumping Hydraulic System

The hydraulic system of dump trucks, as the core powertrain of engineering operations, is directly determined by the quality of the oil and the filling operation, which determines the stability of the entire vehicle lifting and the service life of the equipment. Many overseas fleets and maintenance personnel do not attach enough importance to the filling of hydraulic oil, and continue to use the crude operation method of random filling and mixing without exhaust. In the long run, it is easy to cause lifting failure, shaking, hydraulic high temperature pipeline leakage, premature aging, and a series of failures. This not only increases the operating cost of frequent maintenance, but also causes work stoppage and delays on the construction site, affecting the overall construction progress. Standardized hydraulic oil filling process is the key to reducing the failure rate of dump trucks, ensuring the stable operation of equipment, and extending the service life of hydraulic system accessories. Firstly, cleaning and pre-treatment before filling hydraulic oil are essential. Overseas construction sites are dusty and miscellaneous. If the oil tank filling port is Impurities entering Mixing into the oil tank can cause the valve core to get stuck and the oil pipe to become blocked, leading to increased wear on the inner wall of the oil cylinder. Before refueling, it is necessary to thoroughly clean the oil and dust around the refueling port to keep the refueling area clean. At the same time, check the status of the hydraulic oil tank filter element, ventilation valve, blockage, and aging filter element to prevent secondary pollution of the newly added hydraulic oil. Secondly, strictly follow the vehicle model standards to select hydraulic oil that is suitable for different temperature environments and working conditions. The viscosity properties of the hydraulic oil that is suitable for different working conditions have significant differences. In high temperature tropical areas, high temperature resistant and antioxidant hydraulic oil with strong resistance should be selected. In cold high-altitude areas, special oil with good low-temperature fluidity should be preferred. Different brands and models of hydraulic oil with different viscosities are strictly prohibited from mixing and adding oil. Mixing oil can cause oil deterioration Furthermore, the hydraulic system requires precise control over the amount of oil added. Excessive or insufficient oil filling can cause system failures. Insufficient oil filling can easily lead to problems such as slow lifting of the oil pump suction pipeline and insufficient power for lifting and shaking. Over filling can occupy the heat dissipation space of the oil tank, resulting in poor heat dissipation of the hydraulic system. During high-temperature driving and bumpy processes, it is also easy for oil to overflow and corrode body parts. When adding oil, strictly follow the oil tank scale line to control the oil level within the standard range and reserve reasonable heat dissipation and buffer space to ensure stable operation of the system. After adding oil, system exhaust is the most easily overlooked but crucial step. After adding oil, there will be a large amount of air left in the pipeline and cylinder. If directly put into operation, it will cause unstable hydraulic pressure, abnormal lifting noise, cylinder movement, and other problems. The correct operation method is to maintain the vehicle in an unloaded The sentence is: Repeated low-speed lifting and landing cycle operations thoroughly exhaust residual air inside the oil circuit until the lifting action is smooth, without shaking or abnormal noise. Finally, after refueling and exhaust, a complete machine pressure test must be carried out to comprehensively check the lifting speed, fall back status, system pressure, and oil pipe joint oil seal interface position to confirm that there is no leakage, pressure relief, or abnormal working conditions before completing the entire refueling process. Many overseas users commonly have the misconception that refueling is the end of the job, ignoring key details such as cleaning, oil selection, exhaust, and pressure testing. Although it seems to save time, it actually buries long-term hidden dangers. Standardized hydraulic oil refueling operations can effectively avoid impurity pollution, cavitation, wear, oil deterioration, and other problems. Stable hydraulic system working pressure greatly improves the stability of dump truck operations, reducing faults and stopping power frequency. This helps overseas engineering fleets effectively control operation and maintenance