The “internal leakage” and “external leakage” of the hydraulic gear pump cannot be ignored.

If the hydraulic pump of the tractor is improperly repaired, various faults will occur and affect the farm time. Therefore, the correct use of the maintenance hydraulic pump is an important guarantee for extending its service life and ensuring stability, sensitivity and reliability.
After long-term work of the hydraulic pump, the common problem of the rubber oil seal is that the aging becomes hard and loses the elasticity, which causes the sealing between the low pressure oil chamber and the high pressure oil chamber to be lost. At the same time, the oil pump bushing and the gear end face are worn, resulting in the compression of the pressure relief seal. The amount becomes smaller and the performance deteriorates.
Therefore, the high pressure chamber leaks into the low pressure chamber (generally referred to as “internal leakage”) in the oil pump. The pressure and productivity of the oil pump are reduced, so that the operating equipment can be lifted slowly or not, and the phenomenon of erroneous farming is serious. If the maintenance is not good in daily work, it will also cause the “outer leakage” phenomenon and the largest consumption of oil.

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