Wren H Series, Operation Manual

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6
positioned in numerous places within a 3600 circle. However, for the arm to be correctly
positioned, it must be set within a 900 quadrant of that circle. That quadrant is the area
located between the protruding square drive and the bottom of the housing away from the
swivel inlets. It will always be toward the lower half of the housing and on one side of the
housing when tightening and the other side when loosening.
SETTING THE SQUARE DRIVE FOR ROTATION
The position of the square drive when looking toward the shroud will determine if the tool
is set to tighten or loosen the nut. When the square drive extends to the left when looking
at the shroud with the inlets away from you, the tool is set to loosen the nut. When the
square drive extends to the right, the tool is set to tighten the nut. To change the direction
of rotation for MXTA series wrenches simply push the square drive into the housing until
the drive projects out the opposite side of the tool.
SETTING THE TORQUE
After determining the desired torque, use the torque conversion charts on page 5 to
determine the pressure that is necessary to achieve that torque.
1.Connect the tool to the power supply and turn the pump on.
2.Depress the advance remote control button causing the pressure to be shown on the
gauge.
3.Adjust the pressure by first loosing the nut that locks the pressure adjustment handle and
then rotate the handle clockwise to increase the pressure and counter clockwise to
decrease the pressure. When decreasing pressure, always lower the pressure below the
desired point and then bring the pressure gauge back up to the desired pressure.
4.When the desired pressure is reached, retighten the lock nut and cycle the tool again to
confirm that the desired pressure setting has been obtained.
FIG6
T Ha ndle
Locking Rin g
1.Place the square Drive in the socket, insert the socket retainer ring and pin, and place the
socket on the nut. Make certain the square drive and socket are the correct size for the nut
and that the socket fully engages the nut.
2.Position the reaction arm against an adjacent nut, flange or solid system
component.Make certain that there is clearance for the hoses and swivel couplings.Do not
allow the tool to react against the hoses, or swivel couplings.When reacting directly off the
tool body with reaction arm removed. Do not react off the exposed end plug spigot.
3.After having turned the pump on and presetting the pressure for the correct
torque,depress the remote control advance button to advance the piston assembly.
4.When the wrench is started, the reaction surface of the wrench or reaction arm will move
against the contact point and the nut will begin to turn. Once the piston reaches the end of
its stroke depress the remote control return button to retract the piston.
OPERATING THE WRENCH