3The DCS6400, 6401, 6420, 6421, 7300, 7301, 7900, 7901 will be delivered in a protective cardboard box to pre-vent transport damage. Cardboard is a basic raw material and is consequently reuseable or suitable for recycling(waste paper recycling).DCS6400, 6401, 6420, 6421, 7300, 7301, 7900, 7901Contents PageDelivery inventory .................................................... 4Symbols ................................................................... 4Safety precautions ..............................................5-6Denomination of components ................................ 7Technical data........................................................ 8Mounting the guide bar and saw chain .............9-20Chain brake ........................................................... 2Fuel / Refuelling................................................22-23Chain lubrication .................................................... 24Starting the engine ................................................ 25Stopping the engine............................................... 25Checking the chain brake ...................................... 25Adjusting the carburetor ........................................ 26Working in summer / winter ................................... 26Sharpening the saw chain ................................27-28Cleaning the brake band and sprocket interior ...... 29Contents PageCleaning the guide bar .......................................... 30Replacing the saw chain........................................ 30Replacing the fuel filter .......................................... 30Cleaning the air filter.............................................. 3Replacing the spark plug ....................................... 32Replacing the starter cable .................................... 33Replacing the return spring ................................... 33Mounting the fan housing ...................................... 34Cleaning the cylinder area ..................................... 34Replacing / cleaning the spark arrester screen ..... 34Instructions for daily and periodic maintenance .... 35Service, spare parts and guarantee .................35-36Troubleshooting ..................................................... 36Extract from the spare parts list ............................. 37WARNING !Careless or improper use of this product can cause serious or even fatal injury.Before operating a chain saw or other MAKITA products it is important that you read, fully understand andcarefully follow the instructions outlined in this owners manual. Kickback may cause severe or fatal injury andis one of many potential dangers in operating a chain saw. Kickback and other safety related precautions aredescribed in detail within this owners manual. Additional owners manuals are available from www.makitausa.com and -800-4-MAKITA (462-5482) and MAKITA CANADA INC.,950 Forbes Street, Whitby, Ontario, LN 7B7,Canada, Telephone: (905) 57 22 00.This product complies with: American National Standard Institute B 75.-2000 chain saw safety standard.Canadian Standards Association Z62.-03 chain saw safety standard.Z62.3-04 chain saw kickback standard.Society of Automotive Engineers SAEJ 335-Jun 95 „Multiposition smallengine exhaust system fire ignitionsuppression”The Emissions Compliance Period referred to on the emission Compliance label indicates the number of operat-ing hours for which the engine has been shown to meet federal emissions requirements. Category C= 50 hours,B= 25 hours, and A= 300 hours.With the purchase of this chain saw you have chosen a German quality product. Important instructions for the as-sembly and operation of this saw are given in this manual. For your own safety, we ask you to read the accidentprevention instructions very carefully before putting your chain saw into operation, as incorrect handling can,despite all precautions, lead to accidents. With a little care and attention you will have good service and lastingsatisfaction from this first-rate product.