6. Releasing the re mote control button will automatically retract th e cylinder. The hydraulic
torque wrench wil l automatically reset itself and the operator will he ar an audible “click”
indicating he can a gain push the remote control button and the square driv e will turn. Each
time the cylinder i s extended and retracted, it is called a cycle. Successive cycles are made
until the tool “stalls” at the preset Torque/PSI with an accuracy of +/- 3%. Repeatability
is +/-1%. Please re peat again and again, make the wrench turn without loading,
observe the wrenc h tightening or loosening, no abnormalities, can be put into the
socket.
IMPORTANT: ALWAYS ATTEMPT ONE FINAL CYCLE TO INSURE THE “STALL” POINT
HAS BEEN REACHED.
REMARKS: When the hydraulic torque wrench not in use,you may turn off the lock
button,if long time no using the wrench,please shut off the motor switch.
ADJUST THE PRESSURE
Setting the press ure on the hydraulic power pack.
To set the pressure on th e pump, follow this procedure.
Loosen the lockin g ring below the “T” handle on the hydraulic power pack’s external pre ssure
regulator. Then, turn the “T” handle counterclockwise until it tu rns freely and easily.
Turn th e hydraulic power pack on. Using the hydraulic power pack remote pendant , push the
advance switch (o r button on the air hydraulic power pack) and hold it.
While holding the h ydraulic power pack in the advance mode, slowly turn th e “T” handle
clockwise and obs erve the hydraulic power pack pressure gauge rise.
NOTE: Always adjust the regulator pressure UP - never down.
When your gauge rea ches the predetermined pressure, stop turning the “ T” handle and let
the gauge settle.
If the pressure continues to rise above the predetermined pressure, re lease the back
pressure slight ly by turning the “T” handle counterclockwise. Then, depress the advance
switch on the remote and slowly bring pressure up to the predetermined pre ssure.
When the pressure i s correct, turn the pump off and tighten the lockin g ring which is under
the “T” handle. This sets the pump pressure, which determines torq ue wrench output.
Once your target pressure is set and locked, cycle the hydraulic power pac k once more to
ensure that your pr essure setting did not change as you tightened the lock ing ring.
THE LOOSENING PROCESS
1. Set the pump to 1000 0 PSI. Change the drive to the loosening mode, assuring t he reaction
2. Press and hold the remote control advance button. Pressure will decrease as the
3. Release the remote control advance button and the cylinder automatically retracts,
4. Repeat this process until the fastener can be removed by hand.
arm abuts squarel y on a solid reaction point.
socket begins to turn. As the cylinder extends fully, you will hear an audible “click”.
at which time you again hear the audible “click”.
NOTE: IF THE BOLT/NUT DOES NOT LOOSEN WITH THE ABOVE PROCEDURES,
IT IS AN INDICATION THAT YOU REQUIRE A LARGER HYDRAULIC TORQUE
WRENCH TO LOOSEN THE BOLT/NUT.
THE TIGHTENING PROCESS
1. hydraulic torq ue wrench setting
Firstly, acc ording to the design requirements set torque,If no de sign torque, please ref the
80% of the recommen ded torque.
Way: th e setting torque=(the recommended torque of these c hart figures)×(80%-90%)
For example:the recommended tightening torque is 90% of the chart figure above. For
example; for bolt M 48 the strength grade is 8.8 therefore, the torque is 3920×90% = 3528Nm
2. Pump pressure se tting
According to a desi red torque value and the wrench model to set the pressure o f the pump.
For example 8.8 gra de、M48bolt,the setting torque is 3528N.m, if you prefer to WR-3IBT
wrench,you may fi nd the torque is 3528N. m, the pum p pressur is 54Mpa,so the pump
pressure settin g is 54Mpa.
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3. Confirm the wren ch is tightening, put the wrench on the nut, perform it until the nut does
not move far.