Safety Handbook for Hydraulic Torque Wrenches
To avoid personal injury during system operation, read and follow all CAUTIONS, WARNINGS, and INSTRUCTIONS included with or attached to each product. Enerpac cannot be responsible for damage resulting from unsafe use of product, lack of maintenance, or incorrect product and system application.
Enerpac hydraulic torque wrenches are double acting hand-controlled tools designed to tighten and loosen bolted connections. Any unauthorized change in design, construction or usage of the torque wrench is forbidden for safety reasons and will void the warranty. Hydraulic flow and pressure that is supplied to the wrench is converted to a rotary motion by means of a hydraulic cylinder and drive lever. Advancing and retracting oil flow from the pump is controlled by a remote operated valve with pendant control. The advance pressure supplied from the pump must be limited to 10,000 psi (700 bar) for S & W Series wrenches and 11,600 psi (800 bar) for SQD & HXD wrenches.
Use only heavy-duty impact sockets for power driven machine wrenches, according to ISO-2725 and ISO-1174; DIN 3129 and DIN 3121, or ASME-B107.2/1995. Do not use worn or damaged sockets drives. They must fit precisely on the nut or bolt being tightened. Do not use metric size sockets or Allen-Key drives on imperial nuts or bolts or the reverse. Always secure the socket to the square drive to prevent the socket from slipping off.
Always secure the socket to the square drive to prevent the socket from slipping off. Use the proper sized socket (S-wrench) or cassette (W-wrench) on the nut.
1) Drive Unit
2) Square Drive
3) Quick Release
5) Retainer Pin
6) O-Ring Pin Retainer
Use the proper sized socket (S-wrench) or cassette (W-wrench) on the nut.
The torque wrench must be properly positioned manually to make sure that the reaction force is safely transmitted via there reaction arm and not via
other torque wrench parts. Never use the torque wrench without the reaction arm.
Avoid tilting the wrench. Do not use extensions. If this is unavoidable due to the reaction point, the torque must be reduced. An extra support must be used to minimize tilting and friction. When in doubt, contact Enerpac.
Make sure all couplers and hoses are fully connected and that oil can flow freely from (A to A) and (B to B). Incorrectly mounted couplers can still be closed, with the result that oil on the wrenches’ retract side (B) can be pressurized by the pumps’ advance side (A). The safety relief valve on the wrenches retract side will open and prevent over pressurization.
Bleeding Air From The System:
During first-time operation, the hydraulic hoses and wrench can be full of air. Air must be removed from the system for safe and proper operation. Remove the air by connecting the hose set to the valve on the hydraulic pump. Connect the couplers on the other end of the hose together completing the hydraulic circuit. Cycle the pump and valve several times by using the remote control pendant. This will force any air into the reservoir and out to the atmosphere. Next, connect the torque wrench to the hose set. As before, cycle the pump and valve several times by using the remote control pendant. This will force any air into the reservoir and out to the atmosphere.
Operation Refer to the instruction booklet supplied with torque wrench system for proper operating instructions and procedures.
Be careful not to work in-line with the nuts and bolts you are tightening.
Be careful to avoid pinch points between the reaction arm and the nuts and bolts you are tightening.
Enerpac recommends the use of special loosening liquids or sprays. Enerpac offers hydraulic nut splitters to remove rusted or frozen nuts.
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