5For socket with O-ring and pinMove the O-ring out of the groove in the socket andremove the pin from the socket. Fit the socket onto theanvil of the tool so that the hole in the socket is alignedwith the hole in the anvil. Insert the pin through the holein the socket and anvil. Then return the O-ring to theoriginal position in the socket groove to retain the pin.To remove the socket, follow the installation proceduresin reverse.Fig.4HookThe hook is convenient for temporarily hanging the tool.This can be removed without using a tool. This can beinstalled on either side of the tool.Installing and removing hookFig.5Expand the upper part of the hook in both directions andremove it. To install the hook, follow the removalprocedure in reverse.OPERATIONCAUTION:• Always hold the tool only by the handle whenperforming an operation. Do not touch the metalpart.Fig.6The proper fastening torque may differ depending uponthe kind or size of the bolt, the material of the workpieceto be fastened, etc. The relation between fasteningtorque and fastening time is shown in the figures.200180160140120100806040200 1 2 3 4M10M12M16M16X80M12X80M10X80Standard boltFastening torque (N m)Fastening time (S).004238200180160140120100806040200 1 2 3 4 5M10M12M12X80M10X80High tensile boltFastening torque(N m)Fastening time (S).004239Hold the tool firmly and place the socket over the bolt ornut. Turn the tool on and fasten for the proper fasteningtime.NOTE:• When fastening screw M10 or smaller, carefullyadjust pressure on the switch so that the screw isnot damaged.• Hold the tool pointed straight at the bolt or nutwithout applying excessive pressure on the tool.• If you fasten the bolt for a time longer than shownin the figures, the bolt or the socket may beoverstressed, damaged, etc. Before starting yourjob, always perform a test operation to determinethe proper fastening time for your bolt. Especiallyfor the bolt over than M10, perform the above testoperation to prevent the trouble on socket or bolt,etc.The fastening torque is affected by a wide variety offactors including the following. After fastening, alwayscheck the torque with a torque wrench.1. Voltage• Voltage drop will cause a reduction in thefastening torque.2. Socket• Failure to use the correct size socket willcause a reduction in the fastening torque.• A worn socket (wear on the hex end or squareend) will cause a reduction in the fasteningtorque.3. Bolt• Even though the torque coefficient and theclass of bolt are the same, the properfastening torque will differ according to thediameter of bolt.• Even though the diameters of bolts are thesame, the proper fastening torque will differaccording to the torque coefficient, the classof bolt and the bolt length.