There may be many reasons for the abnormal oil discharge of the hydraulic pump. Here are some common factors that can cause this type of problem: 1. Pump wear: Over time, the hydraulic pump will wear out, resulting in reduced efficiency and abnormal oil delivery. This can be caused by factors such as insufficient lubrication, contamination or high operating pressures. 2. Incorrect pump selection: If the hydraulic pump is improperly selected or does not match the system requirements, it may cause abnormal oil supply. An undersized pump may struggle to deliver the required flow, while an oversized pump may cause excessive pressure and flow, resulting in erratic delivery. 3. Air bubbles: Air bubbles or entrained air in the hydraulic system can disturb the flow of oil and cause abnormal delivery. This can occur due to improper venting during system assembly, leaks, or aeration from excessive turbulence or agitation. 4. Pollution: Contaminants such as dirt, debris or moisture in the hydraulic oil can cause pump blockage or damage, resulting in abnormal oil supply. Contaminants can enter the system through external sources, or be caused by degraded fluids over time. 5. Valve failure: The hydraulic system relies on various valves to regulate the flow and pressure of oil. If these valves malfunction or become stuck, they can disrupt normal oil delivery. Valve failure can cause flow restrictions, pressure spikes or insufficient flow, resulting in erratic operation. 6. Temperature effect: extreme temperature will affect the viscosity of hydraulic oil, resulting in changes in oil delivery. High temperatures cause the oil to thin, reducing its ability to provide adequate lubrication and consistent oil delivery. Conversely, cold temperatures increase the viscosity of the oil, making it difficult for the pump to move the fluid efficiently. 7. System leakage: Hydraulic system leakage will cause fluid loss, resulting in abnormal oil supply. Leaks can occur at multiple points such as connections, seals, hoses or the pump itself. Lower fluid levels can cause cavitation and trapped air, which can affect pump performance. 8. Cavitation: Cavitation occurs when hydraulic fluid pressure falls below its vapor pressure, resulting in the formation of air bubbles. When these bubbles burst, it creates a powerful shock wave that damages the pump and disrupts oil flow. Cavitation can be caused by factors such as a clogged inlet filter, insufficient fluid supply, or excessive pump speed. 9. Improper installation of the pump: Improper installation of the hydraulic pump will lead to abnormal oil output. This could include improper alignment of the pump shaft with the motor or power supply, improper installation or support, or improperly connected hoses and fittings. These installation errors can cause misalignment, increased friction, or leakage, which can affect pump performance. 10. Mechanical problems: Various mechanical problems in the pump will cause abnormal oil delivery. This could include worn or damaged internal components such as impellers, vanes, pistons or seals. Mechanical failure can restrict fluid flow, cause leaks, or reduce pump efficiency. 11. Excessive system back pressure: If the back pressure of the hydraulic system is too large, it will hinder the ability of the pump to deliver oil normally. This can occur due to restrictions in the system, such as clogged filters, clogged or undersized pipes, or closed or partially closed valves. High back pressure will result in reduced flow and abnormal oil delivery. 12. Insufficient liquid level: Insufficient hydraulic oil in the oil tank will cause the pump to suck in air instead of oil, resulting in abnormal delivery. Leaks, improper filling, or improper maintenance practices can cause low fluid levels. It is important to maintain the recommended fluid levels to ensure proper pump operation. 13. Electrical or control system problems: In systems that use electrical or electronic control, problems with electrical components or control systems will cause abnormal oil supply. Problems such as a faulty sensor, damaged wiring, or a faulty control valve can interrupt pump operation and cause inconsistent oil delivery. 14. Insufficient filtration: If the hydraulic oil is not properly filtered, contaminants can accumulate in the system and affect the performance of the pump. Particles such as dirt, metal shavings or sludge can clog the internal parts of the pump, causing abnormal oil delivery. Regular maintenance and proper filtration can help prevent this problem. 15. Viscosity mismatch: Hydraulic pumps are designed to work with hydraulic oils that work within a specific viscosity range. If the viscosity of the fluid is too high or too low for the specifications of the pump, it will cause abnormal oil delivery. Inadequate lubrication or increased internal friction may occur affecting the efficiency of the pump. 16. System overload: If the hydraulic system bears an excessive load or operates beyond the design capacity, the pump will be strained and the oil supply will be abnormal. Overloading can result in increased pressure, reduced flow and potential pump failure. Ensuring that the system is properly matched to the expected workload is critical. 17. Seal and O-ring Contamination: Seals and O-rings in hydraulic systems are critical to maintaining a proper fluid seal. If these parts become worn, damaged or deteriorated, they can introduce contaminants into the system and affect the performance of the pump. Regular inspection and replacement of seals and O-rings can help prevent this problem. 18. Improper pump rotation: Hydraulic pumps are designed to rotate in a specific direction. If the pump is installed or connected in reverse, it will cause abnormal oil supply. The pump may not be producing enough pressure or flow in the wrong direction, resulting in poor performance. 19. Improper type of fluid: The hydraulic system requires the use of compatible hydraulic fluids specified by the manufacturer. Using the wrong type of fluid can lead to problems such as reduced lubrication, increased wear and abnormal oil delivery. It is important to use the recommended fluid to ensure optimum pump performance. 20. Insufficient maintenance: Lack of regular maintenance and inspection will lead to abnormal oil output of the hydraulic pump. Failure to address issues such as leaks, worn parts, or contaminated fluid can gradually degrade your pump's performance over time. Implementing a proper maintenance program and following the manufacturer's recommendations can help prevent problems like this from happening. Keep in mind that troubleshooting hydraulic system issues can be complex and may require specialized knowledge or consultation with a professional in the field.