8The 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. Driver bit or socket bitFailure to use the correct size driver bit or socketbit will cause a reduction in the fastening torque.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 class ofbolt and the bolt length.4. The manner of holding the tool or the material ofdriving position to be fastened will affect thetorque.5. 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 except for thefollowing troubleshooting related to the light.• Never use gasoline, benzine, thinner, alcohol orthe like. Discoloration, deformation or cracks mayresult.TroubleshootingRemaining battery capacity level is low. Charge thebattery cartridge.When the LED indicator still flickerseven after charging the battery cartridge, stop usingand have the tool repaired by a Makita local servicecenter.TroubleThe tool stopsduring operation.Light status Steps to be takenFlickers twice persecond.Flickers onceper second.The tool temperature is high.Cool down it fully.The tool restarts after its temperature becomes low.Flickers five times persecond.Flickers three times persecond.(LED indicator forempty signal forremaining batterycapacity also flickers.)Use the tool with the motor not locked.If the motorremains locked, stop using and have the toolrepaired by a Makita local service center.Not flickersStop using and have the tool repaired by a Makitalocal service center.The tool stops when continuing to pull the switchtrigger for more than approximately 2 minutes.Release the switch trigger.009217To maintain product SAFETY and RELIABILITY, repairs,any other maintenance or adjustment should beperformed by Makita Authorized Service Centers,always using Makita replacement parts.ACCESSORIESCAUTION:• These accessories or attachments arerecommended for use with your Makita toolspecified in this manual. The use of any otheraccessories or attachments might present a risk ofinjury to persons. Only use accessory orattachment for its stated purpose.If you need any assistance for more details regardingthese accessories, ask your local Makita Service Center.• Screw bits• Hook• Plastic carrying case• Various type of Makita genuine batteries andchargers