Operator’s manual K 770, K 770 Rescue, K 770 OilGuard Please read the operator’s manual carefully and make sure you understand the instructions before using the machine. E E E E n n n n g g g g l l l l i i i i s s s s h h h h...
/ n YYYY WWXXXXX rapid and violent and can cause life XXX XX XX-XX Row 2: Serial No. with Husqvarna AB threatening injuries. Read and understand Huskvarna, SWEDEN manufacturing date (Y, W, X): the instructions in the manual before using...
KEY TO SYMBOLS Explanation of warning levels The warnings are graded in three levels. WARNING! WARNING! Indicates a hazardous situation which, if not avoided, will result in death or serious injury. CAUTION! CAUTION! Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
Design and features ..........5 Recommended abrasive and diamond cutting PRESENTATION blade, speciﬁcation ..........33 What is what on the power cutter - K 770, K 770 EC Declaration of Conformity ....... 34 OilGuard? ............. 7 PRESENTATION What is what on the power cutter - K 770 Rescue? 8 MACHINE´S SAFETY EQUIPMENT...
An optical detection system to detect if there is oil in the fuel or if the oil type is wrong. Husqvarna AB is a Swedish company based on a tradition that dates back to 1689, when the Swedish King Karl XI SmartCarb™...
PRESENTATION What is what on the power cutter - K 770, K 770 OilGuard? Front handle 17 Adjustment handle for guard Water valve 18 Blade guard Warning decal 19 Decompression valve Air ﬁlter cover 20 Air purge Starting instruction decal...
PRESENTATION What is what on the power cutter - K 770 Rescue? Front handle 15 Blade guard Warning decal 16 Adjustment handle for guard Air ﬁlter cover 17 Decompression valve Starting instruction decal 18 Air purge Cylinder cover 19 Fuel cap...
MACHINE´S SAFETY EQUIPMENT General • Check that the throttle trigger and throttle lockout move freely and that the return springs work properly. WARNING! Never use a machine that has faulty safety equipment! If your machine fails any checks contact your service agent to get it repaired.
MACHINE´S SAFETY EQUIPMENT Blade guard Checking the vibration damping system WARNING! The engine should be WARNING! Always check that the guard switched off, and the stop switch in is correctly ﬁtted before starting the STOP position. machine. • Check the vibration damping units regularly for cracks This guard is ﬁtted above the cutting blade and is or deformation.
CUTTING BLADES Blade vibration Diamond blades • The blade can become out-of-round and vibrate if an General excessive feed pressure is used. • A lower feed pressure can stop the vibration. WARNING! Never use a diamond blade to Otherwise replace the blade. cut plastic material.
Do not store or transport the power cutter with the cutting blade ﬁtted. All blades should be removed from Some Husqvarna blades are available with side clearance the cutter after use and stored carefully. wear indicators to help determine a blade’s end of life.
STOP position. The direction of rotation for the machine is shown by arrows on the cutting arm. Husqvarna’s blades are high speed blades approved for hand held power cutters. Checking the spindle shaft and ﬂange washers When the blade is replaced with a new one, check the ﬂange washers and the spindle shaft.
ASSEMBLING AND ADJUSTMENTS • Attach the cutting head to the other side of the cutting Cutting trolley (Accessory) arm. A cutting trolley makes it easier to cut in ﬂoors and roads, especially long cuts at a ﬁxed depth. Quick connections makes it easy to install the cutter on the trolley.
FUEL HANDLING General Two-stroke oil • For best results and performance use HUSQVARNA WARNING! Running an engine in a two-stroke engine oil, which is specially formulated for conﬁned or badly ventilated area can our air-cooled two-stroke engines. result in death due to asphyxiation or •...
Tight-ﬁtting, heavy-duty and comfortable clothing that coordination or judgement. permits full freedom of movement. Cutting generates sparks that can ignite clothing. Husqvarna recommends that you wear ﬂame-retardant cotton or heavy denim. Do not wear clothing made of material such as nylon, polyester or rayon. If ignited such material can melt and cling to the skin.
OPERATING • Ensure that the working area is sufﬁciently illuminated WARNING! Unauthorized modiﬁcations to create a safe working environment. and/or accessories may lead to serious • Make sure that no pipes or electrical cables are routed injury or death to the user or others. in the working area or in the material to be cut.
OPERATING • Never cut asbestos materials! • Never cut from a ladder. Use a platform or scaffold if the cut is above shoulder height. Do not overreach • Hold the saw with both hands; keep a ﬁrm grip with thumbs and ﬁngers encircling the handles. The right hand should be on the rear handle and the left hand on the front handle.
OPERATING Cutting with toothed/carbide tipped Thin material blades during rescue operations Cutting thin and hard material (i.e. a sheet metal covered roof) should be conducted in a forward direction for best control. WARNING! A power cutter should never be used with carbide tipped blade for non-emergency work, such as in the construction trades.
OPERATING Kickback kickback zone. Use the lower quadrant of the blade to avoid climbing kickback. WARNING! Kickbacks are sudden and can be very violent. The power cutter can be thrown up and back towards the user in a rotating motion causing serious or even fatal injury.
OPERATING end of the pipe will move downward, the cut will open and no pinching will occur. Proper sequence cutting a pipe First cut section I. Move to side II and cut from section I to bottom of the pipe. Move to side III and cut the remaining part of the pipe ending at the bottom.
STARTING AND STOPPING Before starting automatically returns to its initial position when the machine starts. WARNING! Note the following before starting: Please read the operator’s manual carefully and make sure you understand the instructions before using the machine. Wear personal protective equipment. See under heading ”Personal protective equipment”.
STARTING AND STOPPING With a warm engine: • When the machine starts, press the throttle trigger to disengage the start throttle, and the machine will idle. • Make sure that the stop switch (STOP) is in the left position. NOTICE! Pull with your right hand out the starter cord slowly until you feel a resistance (as the starter pawls engage) and then pull ﬁrmly and rapidly.
If you need further information please contact your nearest service workshop. • Let your Husqvarna dealer regularly check the machine and make essential adjustments and repairs. Maintenance schedule In the maintenance schedule you can see which parts of your machine that require maintenance, and with which intervals it should take place.
This is quite normal. External cleaning Please contact an accredited Husqvarna workshop if you • Clean the machine daily by rinsing it with clean water have any questions.
MAINTENANCE • Remove the upper belt guard. Adjusting the idle speed • Now remove the rear belt guard. CAUTION! Contact your dealer/service workshop, if the idle setting cannot be adjusted so that the blades are stationary. Do not use the machine until it has been properly adjusted or repaired.
MAINTENANCE • Pull the cord out about 30 cm and lift it into the cut-out Changing a broken recoil spring in the periphery of the starter pulley. When the cord is • Undo the bolt in the centre of the pulley and remove intact: Release the spring tension by letting the pulley the pulley.
MAINTENANCE Fuel system Drive gear, clutch • Check the clutch centre, drive gear and clutch spring General for wear. • Check that the fuel cap and its seal are not damaged. Water delivery system • Check the fuel hose. Replace when damaged. Check the nozzles on the bladeguard and the ﬁlter in the Fuel ﬁlter water connection for clogging and clean as necessary.
TROUBLESHOOTING Troubleshooting schedule WARNING! If service operations or troubleshooting does not require the machine to be on, the engine should be switched off, and the stop switch in STOP position. Problem Probable cause Potential Solution See instructions under the heading Starting and Incorrect starting procedure.
Husqvarna AB, SE-561 82 Huskvarna, Sweden, tel +46-36-146500, declares under sole responsibility that the portable cut-off machines Husqvarna K 770, K 770 OilGuard, K 770 Rescue from 2018’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:...