(hydraulic torque wrench) has the following characteristics:

    (1) the pressure gauge of hydraulic system can accurately and reliably control the pre-tightening torque.

    (2) increase the steel degree of screw thread and reduce the risk of bolt fatigue fracture.

    (3) the reliability of high strength bolt connection is guaranteed, so as to reduce weight and save space.

    (4) wide range and strong adaptability, can be used for bolt and internal Angle screws.

    (5) simple operation, convenient use and economic security.

    Operation method

    1. Select the inner hexagon sleeve according to the size of the pre-tightening nut.

    2. According to the requirement of tightening or loosening the nut, combine the ratchet (when tightening the nut, use the right side of the ratchet to loosen the nut and use the left to the ratchet).

    3, the fast with high pressure, low pressure rubber hose inserted into the wrench and the joint of the reversing valve (1/4 "high pressure, low pressure for 3/8"), and asked after insert in place, a quick joint coat turning Angle, in order to lock.

    4. The counterforce rod shall be supported by the corresponding inner hexagonal supporting sleeve or other places that can withstand the reaction force.

    5. The Angle of the spanner connecting rod should be controlled in the Angle range of the backbar calibration.

    6. When suppressing, rotate the air valve to the left for a week, open the air valve and close it when the air is exhausted.

    7, manual pump down, according to the hydraulic cylinder piston rod stretch and shrink the rotation directional valve handle, when the handle is on the left side of the position, the piston rod is stretched out, and vice to shrink, while in the middle position when the pressure is zero.

    8. When suppressing, the torque value can be obtained by observing the reading value (MPa) of the pressure gauge. The pressure value (MPa) of the required torque value (N.m) should be calculated in advance according to the formula given in table 2.

    9. After the pretension is finished, put the handle of the reversing valve in the middle position to make the pressure return to zero.

    10. When removing the high and low pressure hose with the fast connector, the jacket of the quick connector should be rotated in an Angle first so that the gap is aligned to the limit pin to push forward so that the connector can be pulled out