11
© SPX
Form No. 1000528
Rev. 1 December 2, 2011
Operating Instructions
Positioning the Hydraulic Torque Wrench on the Nut
Figure 3 indicates correct position of the hydraulic torque wrench (shown in tightening mode). Always
verify that the reaction pad braces rmly against an adjacent nut or secure reaction structure.
Using the Reaction Arm
See Figure 3. The TWSD hydraulic torque wrench features a 360° adjustable reaction arm. Although
the reaction arm can be placed in a multitude of positions, always try to use the torque tool with the
reaction arm positioned parallel to the socket (i.e. 90° to the torque tool body).
NOTE: Always verify that the reaction arm is locked onto the body before use, and never
attempt to unlock and slide the reaction arm part way off the body to facilitate a reaction
point out of reach of its engaged position.
Figure 3. Correct Reaction Arm Positioning
Reaction Point Safety
Follow these guidelines when selecting appropriate reaction points:
The reaction structure must be rigid enough to accommodate the forces from the hydraulic torque •
wrench. Carefully inspect the reaction points for suitability before applying the torque tool. If in doubt,
contact the torque wrench supplier for advice.
Tapered surfaces are generally unsuitable as the torque wrench tends to 'ride up' the taper, causing •
adverse tool loads. Flat surfaces are preferred.
Packing pieces, spacers, etc. must never be used as a makeshift reaction point. Reaction •
accessories are available to increase the access to reaction points.
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