© SPX FLOW, Inc.
Form No. 1000623
Rev. 6 Jan. 10, 2017
5. Check the pressure on the gauge.
6. Increase or decrease pressure as required. Refer to pump manufacturer's operating instructions.
7. Before tightening a nut, press the remote control button and confirm the correct pressure has been
set.
8. Verify that the bolt threads, nut threads, and nut-to-flange contact faces are liberally coated with anti-
seize lubricant of the same friction coefficient used to derive the torque value.
9. Make sure the hydraulic torque wrench is suitable to deliver the required torque. Should the torque
value exceed 80% of the hydraulic torque wrench output, consider using a higher capacity hydraulic
torque wrench.
10. Use the Pressure/Torque Conversion Chart in this manual to obtain the required pump pressure.
11. Verify that the socket to be used is of the correct type and size. A poor fitting or oversized socket can
damage nuts, induce inaccurate bolt loads, and may result in operator injury.
12. Place the proper size impact socket on the square drive and secure it properly with the locking ring
and pin. Verify that the square drive is fully engaged into the socket.
13. Verify that the reaction arm is placed firmly against a stationary object such as an adjacent nut,
flange, equipment housing, etc.
NOTE: When positioning the wrench, verify the hose connection will not hit any
stationary object, which can result in snapping a hose connection or breaking the
coupler connection.
NOTE: TWHC torque wrenches are equipped with a pressure-release valve built into
the multiswivel manifold to protect against retract pressure intensification should the
retract port hydraulic coupling not be fully connected or become loose during use. If
an intensification occurs, the valve will bleed hydraulic oil externally from the manifold
yoke. Oil bleeding from the swivel manifold is not a sign of seal leakage.
14. Before applying the hydraulic torque wrench to the application, the pump output pressure must be
preset to relieve at the pressure obtained from the Pressure/Torque Conversion Chart. This can be
done with the hydraulic torque wrench connected to the pump and resting on the floor or bench.
Applying advance pressure to the hydraulic torque wrench will extend the piston until it reaches the
end of its stroke whereby the pump pressure will build. Holding the wrench at the end of its stroke
will allow the pump pressure to be adjusted. Retract the hydraulic torque wrench piston and advance
again making sure that the pump relieves at the desired pressure setting. The pump pressure can
also be set by blanking the pump outlets using blank couplings.
NOTE: Allow time for the wrench to retract. If another advance stroke is made before
the torque wrench has fully retracted, the ratchet mechanism may not engage correctly,
causing it to jump a ratchet tooth, and possibly damaging the ratchet. Before applying
another advance stroke, make sure the pump is idling at 103 bar (1,500 psi), which
indicates full retraction.
Initial Setup continued