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Form No. 1000623

Rev. 6 Jan. 10, 2017

higher torques without damage). Do not, under any circumstances, strike the hydraulic

torque wrench or nut/bolt in an attempt to 'shock' the nut free.

Procedure

1. Connect the hydraulic torque wrench to the pump unit. Verify that the couplings are fully screwed

together; they are self-sealing and will restrict oil ow if not fully connected.

2. Before applying the hydraulic torque wrench to the application, the pump output pressure must be

preset to deliver the maximum pressure of 690 bar (10,000 psi). This can be done with the torque

wrench connected to the pump and resting on the oor or bench. Applying advance pressure to the

hydraulic torque wrench will extend the piston until it reached 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

delivered full pressure. The pump pressure can also be set by blanking the pump outlets using blank

couplings.

3. Apply the hydraulic torque wrench and socket to the nut to be loosened and verify that the reaction

pad is braced rmly and squarely against the selected reaction point.

4. Start the pump and advance the hydraulic torque wrench. As the wrench strokes forward, the reaction

pad will press against the reaction point. As the pump pressure builds (and torque is applied to the

nut), the nut will break free. Once the nut has been released, remove the nut by hand if loose enough,

or alternatively use an impact wrench. Using the hydraulic torque wrench is not recommended.

NOTE: Should maximum pump pressure be reached, and the nut has not broken free,

use a higher capacity hydraulic torque wrench (if the nut/bolt material will accept the

higher torques without damage). Do not, under any circumstances, strike the hydraulic

torque wrench or nut/bolt in an attempt to 'shock' the nut free.

5. Retract the hydraulic torque wrench, stop the pump unit, and remove the wrench from the nut.

Operating Instructions continued

SPX FLOW TWHC Series User Manual

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