Stihl HL 75 K Instruction Manual - Page 30
Sharpening Instructions, Storing the Machine, During break-in period, During operation
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Sharpening Instructions Operating Instructions English / USA Storing the Machine The blades must be resharpened if cutting performance and behavior begin to deteriorate (i.e. if blades frequently snag on branches). It is best to have the cutting blades resharpened by your STIHL dealer on a workshop sharpener. It is also possible to use a flat crosscut sharpening file. See "Specifications" for prescribed sharpening or filing angle. : Always file towards the cutting edge. : The file only sharpens on the forward stroke - lift it off the blade on the backstroke. : Use a whetstone to remove burr from cutting edge. : Remove as little material as possible. : After sharpening, clean filing or grinding dust off the cutting blades and lubricate with grease. Do not operate your machine with dull or damaged cutting blades. This may cause overload and will give unsatisfactory cutting results. During break-in period A factory new machine should not be run at high revs (full throttle off load) for the first three tank fillings. This avoids unnecessary high loads during the break-in period. As all moving parts have to bed in during the break-in period, the frictional resistances in the engine are greater during this period. The engine develops its maximum power after about 5 to 15 tank fillings. During operation After a long period of full-throttle operation, allow engine to run for a while at idle speed so that the heat in the engine can be dissipated by flow of cooling air. This protects enginemounted components (ignition, carburetor) from thermal overload. After finishing work Storing for short period: Wait for engine to cool down. To avoid condensation, fill the fuel tank and keep the unit in a dry place until you need it again. Storing for a long period: see chapter "Storing the Machine". For periods of about 3 months or longer : Drain and clean the fuel tank in a well ventilated area. : Run engine until carburetor is dry this helps prevent carburetor diaphragms sticking together. : Clean the cutting blades, check condition and spray with STIHL resin solvent. : Thoroughly clean the machine - pay special attention to the cylinder fins and air filter. : Store the machine in a dry, high or locked location - out of the reach of children and other unauthorized persons. HL 75, HL 75 K 29