**Abstract:** This paper addresses the limitations of current testing methods for power steering hydraulic pumps and proposes an improved approach. The new method has been validated through practical production experiences, demonstrating its ease of use and ability to accurately reflect the performance of the steering hydraulic pump. The test equipment and procedures are detailed, emphasizing the importance of accurate measurement under real-world operating conditions. With the advancement of automotive technology, especially with the introduction of high-speed pumps and complex structures, there is a growing need for more effective and reliable testing methods. This study introduces key improvements such as the 0.85pmax pressure concept, air-tightness testing, oil temperature control, and variable speed impact testing. These enhancements ensure that the test results are more comprehensive, accurate, and representative of actual performance. The test bench design, including the hydraulic system, control software, and data acquisition process, is also described in detail. The proposed method has proven to be efficient, safe, and highly applicable in industrial settings, significantly improving the accuracy and speed of testing. The power steering hydraulic pump plays a crucial role in the overall performance of a vehicle's steering system, directly affecting handling and stability. As new materials and technologies continue to evolve, traditional testing methods have become insufficient for modern pump designs. The original test method, developed in the 1980s, was based on outdated assumptions and failed to meet the demands of contemporary products. To address this, the paper introduces a revised testing procedure that better aligns with current industry standards and operational requirements. One of the key innovations is the adoption of the 0.85pmax pressure level during testing, which prevents the safety valve from opening and ensures more accurate performance evaluation. Additionally, the inclusion of an air-tightness test improves the assessment of sealing quality and assembly integrity. The reliability of the pump under varying oil temperatures is also addressed, with a recommended test temperature of around 70°C to simulate real driving conditions. The elimination of the cut-off test and the introduction of a variable speed impact test further enhance the realism and effectiveness of the testing process. The test bench itself is designed with flexibility and automation in mind. It features an AC variable frequency drive, a 150L fuel tank with a heater, and advanced filtration systems to maintain oil cleanliness. The hydraulic system uses proportional valves and sensors for precise control and monitoring. The computer control software, built on a DOS-based platform, offers a user-friendly interface, real-time data display, and automated reporting. The system also includes robust grounding and shielding measures to minimize electrical interference, ensuring stable and reliable operation. Overall, the proposed testing method and equipment provide a more accurate, efficient, and practical solution for evaluating power steering hydraulic pumps. Its implementation has already demonstrated significant improvements in testing efficiency and result accuracy, making it a valuable tool for both research and industrial applications.

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