Echo SRM-266T Operator's Manual

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SRM-266T MAINTENANCE© 10/2014 ECHO Inc.X7502027204 29When the wear indicators located at the bottom of theSpeed-Feed® head are worn smooth, or if holes appear,replacement of the cover or the entire Speed-Feed® head isrequired.Sharpening Metal BladesThree styles of metal blades are approved for use on the ECHOBrush Cutter. The 8-tooth blade can be sharpened duringnormal maintenance. The clearing blade and 80 tooth bladerequire professional service.Before sharpening, CLOSELY inspect blade for cracks (look atthe bottom of each tooth and the center mounting hole closely),missing teeth and bending. If ANY of these problems arediscovered, replace the blade.When sharpening a blade, always remove the same amount ofmaterials from each tooth to maintain balance. A blade that is not balanced will cause unsafe handling dueto vibration and can result in blade failure.1. File each tooth at a 30 degree angle a specific number oftimes, eg. 4 strokes per tooth. Work your way around theblade until all teeth are sharp.2. DO NOT file the ‘gullet’ (radius) of the tooth with the flat file.The radius must remain. A sharp corner will lead to a crackand blade failure.If an electric grinder is used, use care not to overheat teeth, donot allow tips/tooth to glow red or turn blue. DO NOT placeblade in cooling water. This will change the temper of the blade and could result in blade failure.3. After sharpening teeth, check each tooth radius for evidenceof a square (sharp) corner. Use the round (rat tail) file torenew the radius.Wear Indicators