Wren 10MXTA series, Operation And Maintenance Manual

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6. Releasing the remote control button will automatically retract the cylinder. The hydraulic
torque wrench will automatically reset itself and the operator will hear an audible “click”
indicating he can again push the remote control button and the square drive will turn. Each
time the cylinder is 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 repeat again and again
,
make the wrench turn without loading,
observe the wrench 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 pressure on the hydraulic power pack.
To set the pressure on the pump, follow this procedure.
Loosen the locking ring below the “T” handle on the hydraulic power pack’s external pressure
regulator. Then, turn the “T” handle counterclockwise until it turns freely and easily.
Turn the hydraulic power pack on. Using the hydraulic power pack remote pendant, push the
advance switch (or button on the air hydraulic power pack) and hold it.
While holding the hydraulic power pack in the advance mode, slowly turn the “T” handle
clockwise and observe the hydraulic power pack pressure gauge rise.
NOTE: Always adjust the regulator pressure UP - never down.
When your gauge reaches the predetermined pressure, stop turning the “T” handle and let
the gauge settle.
If the pressure continues to rise above the predetermined pressure, release the back
pressure slightly by turning the “T” handle counterclockwise. Then, depress the advance
switch on the remote and slowly bring pressure up to the predetermined pressure.
When the pressure is correct, turn the pump off and tighten the locking ring which is under
the “T” handle. This sets the pump pressure, which determines torque wrench output.
Once your target pressure is set and locked, cycle the hydraulic power pack once more to
ensure that your pressure setting did not change as you tightened the locking ring.
THE LOOSENING PROCESS
1. Set the pump to 10000 PSI. Change the drive to the loosening mode, assuring the 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 squarely 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 torque wrench setting
Firstly, according to the design requirements set torque,If no design torque, please ref the
80% of the recommended torque.
Way: the setting torque=(the recommended torque of these chart figures)×(80%-90%)
For example
：
the recommended tightening torque is 90% of the chart figure above. For
example; for bolt M48 the strength grade is 8.8 therefore, the torque is 3920×90% = 3528Nm
2. Pump pressure setting
According to a desired torque value and the wrench model to set the pressure of the pump.
For example 8.8 grade
、
M48bolt,the setting torque is 3528N
.
m, if you prefer to WR-3IBT
wrench,you may find the torque is 3528N
.
m, the pump pressur is 54Mpa,so the pump
pressure setting is 54Mpa
.
7
3. Confirm the wrench is tightening, put the wrench on the nut, perform it until the nut does
not move far.