Several common problems frequently encountered by Beijing Huade variable plunger pumps are mainly oil absorption and leakage. The more common one is the insufficient oil suction of the hydraulic pump. This situation is usually due to the blockage of the suction line Problem, the pipeline needs to be cleaned. At the same time, there is also the problem of excessive leakage. This situation is usually caused by some impurities in the oil pump, or the lack of tight fit between various parts.