User manual HUSQVARNA K 750

[. . . ] Operator’s manual (EPA) K750 Please read the operator’s manual carefully and make sure you understand the instructions before using the machine. English KEY TO SYMBOLS Key to symbols WARNING!The machine can be a dangerous tool if used incorrectly or carelessly, which can cause serious or fatal injury to the operator or others. Please read the operator’s manual carefully and make sure you understand the instructions before using the machine. Always wear: • Protective helmet • Hearing protection • Protective goggles or a visor • Breathing mask WARNING! [. . . ] Never use a cutting blade at a lower speed rating than that of the power cutter. Never use a cutting blade for any other purpose than that it was intended for. Our cutting blades are manufactured for high-speed, portable power cutters. If blades from other manufacturers are used, ensure that the blades conform to all regulations and demands that concern this type of power cutter. Special blades Some cutting blades are designed for stationary equipment and for use with attachments. Such cutting blades must not be used on portable power cutters. Always contact local authorities and make sure you are following applicable directives. ! General WARNING!Cutting plastics with a diamond blade or rescue blade can cause kickback when the material melts due to the heat produced when cutting and sticks to the blade. Abrasive discs The cutting material on abrasive discs consists of grit bonded using an organic binder. ”Reinforced blades” are made up of a fabric or fibre base that prevents total breakage at maximum working speed if the blade should be cracked or damaged. A cutting blade’s performance is determined by the type and size of abrasive corn, and the type and hardness of the bonding agent. Abrasive discs, types and use Use Disc type Material Concrete, asphalt, stone masonry, cast iron, aluminium, copper, brass, cables, rubber, plastic, etc. Run the disc dry for about a half minute after using an abrasive disc with water cooling. NOT recommended Cutting blades are available in two basic designs; abrasive discs and diamond blades. Concrete Always remove the cutting blade when the machine is transported. Make sure that the right bushing is used for the cutting blade to be fitted on the machine. Lower quality blades often have inferior cutting capacity and a shorter service life, which results in a higher cost in relation to the quantity of material that is cut. Metal Check that the blade is approved for the same or higher speed according to the aproval plate of the engine. Never use a cutting blade with a lower speed rating than that of the power cutter. English – 11 SAFETY INSTRUCTIONS Ensure the blade it not cracked or damaged in any other way. Diamond blades for dry cutting Diamond blades for dry cutting are a new generation of blades that do not require water cooling. It is most economical to allow the blade to cool by simply lifting it out from the cut every 30–60 seconds and letting it rotate in the air for 10 seconds. Test the abrasive disc by hanging it on your finger and tapping it lightly with a screwdriver or the like. If the disc does not produce a resonant, ringing sound it is damaged. Diamond blades Diamond blades consist of a steel body provided with segments that contain industrial diamonds. Diamond blades ensure lower costs per cutting operation, fewer blade changes and a constant cutting depth. When using diamond blades make sure that it rotates in the direction indicated by the arrow on the blade. Always use a sharp diamond blade. Sharpen the blade by cutting in a soft material such as sandstone or brick. A "soft" diamond blade has a relatively short service life and large cutting capacity. A "hard" diamond blade has a longer service life and reduced cutting capacity, and should be used for soft materials such as brick and asphalt. Material Diamond blades are ideal for masonry, reinforced concrete and other composite materials. Diamond blades are not recommended for cutting metal. Diamond blades for wet cutting ! WARNING! [. . . ] Check the starter and starter cord and clean the outside of the starter unit’s air intake. Check that the stop switch works correctly. 17 7 1 Weekly maintenance 8 9 Check, clean or replace the foam plastic filter. Check that the handles and vibration damping elements are not damaged. 10 Clean the spark plug. Monthly maintenance 15 Check the paper filter 16 Check the clutch centre, drive gear and clutch spring for wear. [. . . ]