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As a key component of the special vehicle chassis power transmission system, high-power hydraulic torque is not sufficient due to the small number of sub-samples in the early stage of product development and insufficient assessment of bench reliability, resulting in product testing, maintenance and support can only be designed according to experience and lack of scientific planning. Through the analysis of torque converter reliability data, the high-power hydraulic torque hybrid Weibull reliability analysis model is established, and the reliability of hydraulic torque converter under different mileages, the weak links and inspection methods are estimated. For the early failures that may occur in the production process, an intensive factory test plan has been formulated. According to the analysis of fault and maintenance data during the use of high-power torque converters, the testing, maintenance and guarantee of equipment are scientifically planned and designed.