Makita DTW250 Instruction Manual

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Contents

Makita DTW250 Instruction Manual Manual pdf 7 page image

73. 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 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 orthe like. 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.Fig.11Raise the arm part of the spring and then place it in therecessed part of the housing with a slotted bitscrewdriver of slender shaft or the like.Fig.12Use pliers to remove the carbon brush caps of the carbonbrushes. Take out the worn carbon brushes, insert thenew ones and replace the carbon brush caps in reverse.Fig.13Fig.14Make sure that the carbon brush cap have fit into theholes in brush holders securely.Reinstall the rear cover and tighten two screws securely.To maintain product SAFETY and RELIABILITY, repairs,any other maintenance or adjustment should beperformed by Makita Authorized Service Centers,always using Makita replacement parts.OPTIONAL 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.• Sockets• Extension bar• Universal joint• Bit adapter• Various type of Makita genuine batteries andchargersNOTE:• Some items in the list may be included in the toolpackage as standard accessories. They may differfrom country to country.