Makita DTW253Z Instruction Manual

Also see for DTW253: Instruction manual

7N m80100600 1.0 2.0 3.0 (S)M14(9/16")M12(1/2")M10(3/8")M10(3/8")M12(1/2")M14(9/16")Fastening torqueFastening timeProper fastening torque(ft.lbs)120140(101)(87)(72)(58)(43)40(29)20(14).Standard bolt0086690 1.0 2.0 3.0 4.0 5.0 (S)M8(5/16")M10(3/8")M10(3/8")M8(5/16")Fastening timeFastening torqueProper fastening torque8010060120140(101)(87)(72)(58)(43)40(29)20(14)M12(1/2")High tensile boltN m(ft.lbs).M12(1/2")008670NOTE:• 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 brushes1006258Replace 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.1. Limit mark