Makita DTW152 Instruction Manual

6through the hole in the socket and anvil. Then returnthe O-ring to the original position in the socketgroove to retain the pin. To remove the socket,follow the installation procedures in reverse.HookFig.8The hook is convenient for temporarily hanging the tool.This can be installed on either side of the tool.To install the hook, insert it into a groove in the toolhousing on either side and then secure it with a screw. Toremove, loosen the screw and then take it out.OPERATIONCAUTION:• Always insert the battery cartridge all the way until itlocks in place. If you can see the red part on theupper side of the button, it is not locked completely.Insert it fully until the red part cannot be seen. If not,it may accidentally fall out of the tool, causing injuryto you or someone around you.Hold the tool firmly and place the socket over the bolt or nut.Turn the tool on and fasten for the proper fastening time.Fig.9The 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.Standard boltFastening torqueFastening time (S)Proper fastening torqueN m(kgf cm)0.50 1 1.5 2 2.5 3009168High tensile boltFastening torqueFastening time (S)Proper fastening torqueN m(kgf cm)009169NOTE:• Hold the tool pointed straight at the bolt or nut.• Excessive fastening torque may damage thebolt/nut or socket. Before starting your job, alwaysperform a test operation to determine the properfastening time for your bolt or nut.• If the tool is operated continuously until the batterycartridge has discharged, allow the tool to rest for15 minutes before proceeding with a fresh batterycartridge.The fastening torque is affected by a wide variety offactors including the following. After fastening, alwayscheck the torque with a torque wrench.1. When the battery cartridge is discharged almostcompletely, voltage will drop and the fasteningtorque will be reduced.2. Socket• Failure to use the correct size socket will causea 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 proper fasteningtorque will differ according to the diameter ofbolt.• Even though the diameters of bolts are thesame, the proper fastening torque will differaccording to the torque coefficient, the class ofbolt and the bolt length.4. The use of the universal joint or the extension barsomewhat reduces the fastening force of theimpact wrench. Compensate by fastening for alonger period of time.5. The manner of holding the tool or the material ofdriving position to be fastened will affect the torque.6. Operating the tool at low speed will cause areduction in the fastening torque.MAINTENANCECAUTION:• Always be sure that the tool is switched off and thebattery cartridge is removed before attempting toperform inspection or maintenance.• Never use gasoline, benzine, thinner, alcohol or thelike. Discoloration, deformation or cracks mayresult.Replacing carbon brushesFig.10Replace when they wear down to the limit mark. Keepthe carbon brushes clean and free to slip in the holders.Both carbon brushes should be replaced at the sametime. Use only identical carbon brushes.Use a screwdriver to remove two screws then removethe rear cover.