The stability of the output pressure of the hydraulic wrench pump station will be the accuracy of the output torque of the direct hydraulic torque wrench, and will also have a negative impact on the service life of the hydraulic torque wrench and the service life of the dismantled nut, as well as the hydraulic shock hazard The

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Nuts after repeated repair and disassembly, the majority of the hexagonal face of the nut will fail, resulting in can not be tightened and scrapped, with the same thing the second, the hydraulic wrench output torque changes will be between the sleeve and the lock nut mechanical impact , Thus the ring is locked by the hexagonal surface of the nut, resulting in nut failure, and into the hydraulic wrench pump pressure instability factors will greatly shorten the number of equipment, bolt detachable maintenance.

Hydraulic cylinder thrust F = PxA, hydraulic pump station output pressure P is unstable, it is clear that the hydraulic cylinder output force F will also fluctuate, resulting in hydraulic torque wrench output torque instability, thus affecting the bolt locking torque is not Stable, to the installation of equipment caused by potential risks;

Due to the hydraulic wrench output hydraulic pressure fluctuations, will change the output torque fluctuations, so that the hydraulic torque wrench each relative movement between the parts of the mechanical impact, the mechanical impact will be directly shortened parts of the movement accuracy and service life, Eventually leading to the shortened life of the entire hydraulic torque wrench.