Echo SRM - 225U manual Sharpening metal blades

Page 31

Grass Trimmer/Brush Cutter 31

Operator's Manual

sharpening metal blades

Three styles of metal blades are approved for use on the ECHO Brush Cutter. The 8-tooth blade can be sharpened during normal mainte- nance. The clearing blade and 80 tooth blade require professional service.

Before sharpening, CLOSELY inspect blade for cracks (look at the bottom of each tooth and the center mounting hole closely), missing teeth and bending. If ANY of these problems are discovered, replace the blade.

When sharpening a blade, always remove the same amount of materials from each tooth to maintain balance. A blade that is not balanced will cause unsafe handling due to vibration and can result in blade failure.

Tool required: Flat file (preferred). Electric grinder if special care is used. Round (rat tail) file for gullet (radius).

1.File each tooth at a 30 degree angle a specific number of times, eg. 4 strokes per tooth. Work your way around the blade 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 crack and blade failure.

IMPORTANT

If an electric grinder is used, use care not to overheat teeth, do not allow tips/tooth to glow red or turn blue. DO NOT place blade 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 evidence of a square (sharp) corner. Use the round (rat tail) file to renew the radius.

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Contents Grass Trimmer/Brush Cutter Operators manual Safety manualTable of Contents IntroductionInternational symbols Safety Manual safety symbols and important informationPersonal condition and safety equipment Hearing Protection Physical ConditionEye Protection Hand ProtectionKeep a Firm Grip Repetitive Stress InjuriesRead the Manuals Clear the Work AreaEmission Control exhaust & evaporative EquipmentEPA 2010 and Later and/or C.A.R.B. Tier Shaft Decal DescriptionPage Contents Nylon line head installation Assembly Plastic shield installationNylon line operation Remove nylon line head Blade installationInstall Metal Shield To advance trimmer lineInstall Blade Throttle linkage and ignition leads Handle installationBalance and adjust unit Blade selection OperationPage Fuel Requirements FuelMixing Instructions Purge Bulb Starting cold engineStarting warm engine Stopping engine MaintenanceSkill levels Level USE Hours Maintenance intervalsFuel filter Air filterCooling system Spark plugSpark Arrestor Screen Exhaust systemExhaust Port Cleaning Engine Break-In Carburetor adjustmentHigh Altitude Operation Lubrication Gear HousingDrive Shaft Nylon line replacement Page Sharpening metal blades Engine Problem Troubleshooting Chart TroubleshootingLong Term Storage over 30 days StorageModel SRM-225U SpecificationsExceptions Warranty Statements99922201032 12/03/09 01/2010 Page Grass Trimmer/Brush Cutter 39 Operators Manual Echo consumer product support ServiceWarranty registration Additional or replacement manuals Servicing Information parts/serial number
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