Operator′s manual K760 K760 Rescue Please read the operator’s manual carefully and make sure you understand the instructions before using the machine.
KEY TO SYMBOLS Manual version Air purge This manual is the International version used for all English speaking countries outside North America. If you operate in North America use the US-version. Symbols on the machine 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.
CONTENTS Contents KEY TO SYMBOLS Manual version ..................................................... Symbols on the machine ...................................... Explanation of warning levels ............................... CONTENTS Contents ............................................................... PRESENTATION Dear Customer, .................................................... Design and features ............................................. PRESENTATION What is what on the power cutter - K760? ...
PRESENTATION Dear Customer, Thank you for choosing a Husqvarna product! It is our wish that you will be satisfied with your product and that it will be your companion for a long time. A purchase of one of our products gives you access to professional help with repairs and services. If the retailer who sells your machine is not one of our authorised dealers, ask him for the address of your nearest service workshop. This operator’s manual is a valuable document.
PRESENTATION What is what on the power cutter - K760? 1 Front handle 15 Blade guard 2 Water tap 16 Decompression valve 3 Warning decal 17 Air purge 4 Air filter cover 18 Fuel cap 5 Cylinder cover 19 Water connection with filter 6 Choke control with start throttle lock 20 Belt guard 7 Throttle lockout 21 Cutting arm 8 Throttle trigger 22 Rating plate 9 Stop switch 23 Belt tensioner 10 Disconnection function for OilGuard (K760 OilGuard) 24 Cutting head 11 Starter handle 25 Cutti
PRESENTATION What is what on the power cutter - K760 Rescue? 1 Front handle 14 Decompression valve 2 Warning decal 15 Air purge 3 Air filter cover 16 Fuel cap 4 Cylinder cover 17 Harness 5 Choke control with start throttle lock 18 Belt guard 6 Throttle lockout 19 Cutting arm 7 Throttle trigger 20 Rating plate 8 Stop switch 21 Belt tensioner 9 Starter handle 22 Cutting head 10 Starter 23 Cutting blade (not supplied) 11 Muffler 24 Combination spanner 12 Adjustment handle for gu
MACHINE´S SAFETY EQUIPMENT General ! • Check that the throttle trigger and throttle lockout move freely and that the return springs work properly. • Start the power cutter and apply full throttle. Release the throttle control and check that the cutting blade stops and remains stationary. If the cutting blade rotates when the throttle is in the idle position you should check the carburettor’s idle adjustment. See instructions in the section "Maintenance".
MACHINE´S SAFETY EQUIPMENT Blade guard ! Checking the vibration damping system WARNING! Always check that the guard is correctly fitted before starting the machine. This guard is fitted above the cutting blade and is designed to prevent parts of the blade or cutting fragments from being thrown towards the user. ! WARNING! The engine should be switched off, and the stop switch in STOP position. • Check the vibration damping units regularly for cracks or deformation. Replace them if damaged.
CUTTING BLADES General ! Cutting blades for different materials WARNING! A cutting blade may burst and cause injury to the operator. ! Never use a diamond blade to cut plastic material. The heat produced during cutting may melt the plastic and it can stick to the cutting blade and cause a kickback. The cutting blade manufacturer issues warnings and recommendations for the use and proper care of the cutting blade. Those warnings come with the cutting blade.
CUTTING BLADES Abrasive blades ! • WARNING! Do not use abrasive blades with water. The strength is impaired when abrasive blades are exposed to water or moisture, which results in an increased risk of the blade breaking. General ! The cutting material on abrasive blades 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.
CUTTING BLADES Diamond blades and cooling • During cutting the friction in the cut causes the diamond blade to be heated up. If the blade is allowed to get too hot this can result in loss of blade tensioning or core cracking. Diamond blades for dry cutting • Although no water is required for cooling, dry cutting blades must be cooled with air flow around the blades. For this reason dry cutting blades are recommended only for intermittent cutting.
ASSEMBLING AND ADJUSTMENTS General ! WARNING! The engine should be switched off, and the stop switch in STOP position. Checking the direction of the blade rotation • Husqvarna’s blades are high speed blades approved for hand held power cutters. When using diamond blades make sure that it rotates in the direction indicated by the arrow on the blade. The direction of rotation for the machine is shown by arrows on the cutting arm.
ASSEMBLING AND ADJUSTMENTS Disengaging OilGuard (K760 OilGuard) • When the machine is delivered, the OilGuard plug (A) and the blue indicator pin (B) are fitted in the tank. • If you are in a situation where you do not have access to Husqvarna OilGuard oil, but you have oil of a similar quality, you can deactivate the OilGuard system using the disconnection function. • To deactivate the function, pry off the OilGuard plug using a screwdriver and then break off the indicator pin.
FUEL HANDLING General Two-stroke oil K760 ! WARNING! Running an engine in a confined or badly ventilated area can result in death due to asphyxiation or carbon monoxide poisoning. Use fans to ensure proper air circulation when working in trenches or ditches deeper than one meter. Fuel and fuel fumes are flammable and can cause serious injury when inhaled or allowed to come in contact with the skin. For this reason observe caution when handling fuel and make sure there is adequate ventilation.
FUEL HANDLING Fueling ! WARNING! Always stop the engine and let it cool for a few minutes before refuelling. The engine should be switched off, and the stop switch in STOP position. OilGuard (K760 OilGuard) • Machines fitted with OilGuard have a built-in system for identifying incorrect fuel mixtures. • Once the machine is running, a detector reads the fuel quality which takes about ten seconds. If the correct amount of Husqvarna OilGuard oil has been used, the machine will run at a normal speed.
OPERATING Protective equipment General • Do not use the machine unless you are able to call for help in the event of an accident. Personal protective equipment You must use approved personal protective equipment whenever you use the machine. Personal protective equipment cannot eliminate the risk of injury but it will reduce the degree of injury if an accident does happen. Ask your dealer for help in choosing the right equipment.
OPERATING ! WARNING! This machine produces an electromagnetic field during operation. This field may under some circumstances interfere with active or passive medical implants. To reduce the risk of serious or fatal injury, we recommend persons with medical implants to consult their physician and the medical implant manufacturer before operating this machine.
OPERATING • • • • Maintain a safe distance from the cutting blade when the engine is running. Never leave the machine unsupervised with the motor running. Never move the machine when the cutting equipment is rotating. The machine is equipped with a friction retarder to shorten the blade stop time. The guard for the cutting equipment should be adjusted so that the rear section is flush with the work piece.
OPERATING Risk area Before each rescue operation No persons that do not have the protective equipment described above shall be allowed inside the risk area for thrown material. Check that the blade and the blade guard is not damaged or cracked. Replace the blade or the blade guard if it has been exposed to impact or is cracked. • Check that no carbide tips have loosened from the cutting blade. • Check that the blade is not skew or shows signs of cracking or other defects.
OPERATING Kickback zone Pipe cutting Never use the kickback zone of the blade for cutting. If the blade is pinched or stalled in the kickback zone, the reactive force will push the power cutter up and back towards the user in a rotating motion causing serious or even fatal injury. Special care should be taken when cutting in pipes. If the pipe is not properly supported and the cut kept open through out the cutting, the blade might be pinched in the kickback zone and cause a severe kickback.
OPERATING How to aviod kickback Avoiding kickback is simple. • The work piece must always be supported so that the cut stays open when cutting through. When the cut opens there is no kickback. If the cut closes and pinches the blade there is always a risk of kickback. • • Take care when inserting the blade in an existing cut. Be alert to movement of the work piece or anything else that can occur, which could cause the cut to close and pinch the blade.
STARTING AND STOPPING Before starting ! WARNING! Note the following before starting: Please read the operator’s manual carefully and make sure you understand the instructions before using the machine. • Press the air purge diaphragm repeatedly until fuel begins to fill the diaphragm (about 6 times). The diaphragm need not be completely filled. • Grip the front handle with your left hand. Put your right foot on the lower section of the rear handle pressing the machine against the ground.
STARTING AND STOPPING With a warm engine: ! • Make sure that the stop switch (STOP) is in the left position. • Set the choke control in the choke position. The choke position is also the automatic start throttle position. • Decompression valve: Press in the valve to reduce the pressure in the cylinder, this is to assist starting the power cutter. The decompression valve should always be used when starting. The valve automatically returns to its initial position when the machine starts.
MAINTENANCE General ! WARNING! The user must only carry out the maintenance and service work described in this Operator's Manual. More extensive work must be carried out by an authorized service workshop. The engine should be switched off, and the stop switch in STOP position. Wear personal protective equipment. See under heading ”Personal protective equipment”.
MAINTENANCE Cleaning Functional inspection External cleaning General inspection • • Clean the machine daily by rinsing it with clean water after the work is finished. Cooling air intake • Clean the cooling air intake when needed. NOTICE! A dirty or blocked air intake results in the machine overheating which causes damage to the piston and cylinder.
MAINTENANCE Replacing the drive belt ! • WARNING! Never start the engine when the belt pulley and clutch are removed for maintenance. Do not start the machine without the cutting arm or cutting head fitted. Otherwise the clutch could come loose and cause personal injuries. First release the two bolts and then the adjuster screw to release the belt tension. Carburettor The carburettor is equipped with fixed needles to ensure the machine always receives the correct mixture of fuel and air.
MAINTENANCE Starter ! • WARNING! When the recoil spring is wound up in the starter housing it is under tension and can, if handled carelessly, pop out and cause personal injury. Secure the starter cord around the cord pulley as illustrated. Tighten the fastening well and ensure that the free end is as short as possible. Secure the end of the starter cord in the starter handle. Always be careful when changing the recoil spring or the starter cord. Always wear protective goggles.
MAINTENANCE Changing a broken recoil spring Fuel system • General Undo the bolt in the centre of the pulley and remove the pulley. • Check that the fuel cap and its seal are not damaged. • Check the fuel hose. Replace when damaged. Fuel filter • Bear in mind that the return spring lies tensioned in the starter housing. • Loosen the bolts holding the spring cassette. • The fuel filter sits inside the fuel tank. • The fuel tank must be protected from contamination when filling.
TECHNICAL DATA Technical data Technical data K760, K760 Rescue Engine Cylinder displacement, cm3 74 Cylinder bore, mm 51 Stroke, mm 36 Idle speed, rpm 2700 Wide open throttle - no load, rpm 9300 (+/- 150) Power, kW/ rpm 3,7/9000 Ignition system Manufacturer of ignition system SEM Type of ignition system CD Spark plug Champion RCJ 6Y/NGK BPMR 7A Electrode gap, mm 0,5 Fuel and lubrication system Manufacturer of carburettor Zama Carburettor type C3 Fuel tank capacity, litre 0,9 Wate
TECHNICAL DATA EC-declaration of conformity (Applies to Europe only) Husqvarna AB, SE-561 82 Huskvarna, Sweden, tel +46-36-146500, declares under sole responsibility that the power cutters Husqvarna K760, K760 Rescue from 2013’s serial numbers and onwards (the year is clearly stated in plain text on the rating plate with subsequent serial number), complies with the requirements of the COUNCIL’S DIRECTIVES: • of May 17, 2006 ”relating to machinery” 2006/42/EC • of December 15, 2004 ”relating to electromag
GB - Original instructions 1155019-26 ´®z+W!|¶6-¨ ´®z+W!|¶6-¨ 2013-02-19
