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Positioning the Hydraulic Torque Wrench on the Nut
The TWLC hydraulic torque wrench fits directly around the nut, with its built-in reaction pad designed to
brace against an adjacent nut. Figure 4 indicates correct position of the hydraulic torque wrench (shown
in tightening mode). Always verify that the reaction pad braces firmly against an adjacent nut or secure
reaction structure.
Reaction pad is braced firmly
against an adjacent nut.
Figure 4. Correct Positioning of the Hydraulic Torque Wrench
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.
© SPX
Operating Instructions
12
Form No. 1000529
Rev. 1 December 6, 2011
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