This hydraulic wrench features a simple structure, easy operation, light weight, and high output capacity. Torque is applied to the nut via a four-way drive shaft or hexagonal hollow ratchet, enabling precise tightening or loosening of bolts or nuts. Hydraulic oil serves as the driving force, propelling the piston to drive the entire mechanism, transferring force to the drive shaft and drive sleeve. When using a hydraulic wrench to remove bolts, note that nut removal torque varies significantly across industries and conditions. For instance, an installation torque of 5000 N·m may be substantially reduced after prolonged exposure to weathering, high temperatures, or pressure corrosion. Therefore, the removal torque should generally be set at 1.5 to 2 times the original installation torque.