28STOPSERVICECleaning the brake band and sprocket interiorCAUTION: Before doing any work on the guide bar orchain, always switch off the engine and pull the plug capoff the spark plug (see "Replacing the spark plug"). Alwayswear protective gloves!CAUTION: Start the chain saw only after having assem-bled it completely and inspected!Remove the sprocket guard (4) (See "PUTTING INTO OPER-ATION" figs. A and B) and clean the sprocket interior with abrush.Turn the chain tightener screw (5) to the left (counterclock-wise) until you feel resistance.Remove the chain (3) and guide bar (2).NOTE:Make sure that no residue or contaminants remain in the oilguide groove (1) and the chain tightener (6).For replacing the guide bar, chain, and sprocket see "PUTTINGINTO OPERATION".NOTE:The chain brake is a very important safety device andlike any other component subject to normal wear andtear.Regular inspection and maintenance are important foryour own safety and must be done by a MAKITA servicecenter.Cleaning the guide bar,lubricating the sprocket noseCAUTION: Protective gloves must be worn.Regularly inspect the bearing surfaces of the guide bar fordamage, and clean them with a suitable tool.If the saw is used intensively it will be necessary to lubricatethe return sprocket bearings regularly (once a week). To dothis, first thoroughly clean the 0.08" (2 mm) hole at the tip ofthe guide bar, and then press in a small amount of multi-purpose grease.Multi-purpose grease and grease guns are available asaccessories.Multi-purpose grease (order no. 944 360 000)Grease gun (order no. 944 350 000)AB125 463