Husqvarna K 770 Vac Operator's Manual

Husqvarna K 770 Vac Operator's Manual

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K 770 Vac
Operator's manual


Table of Contents

Summary of Contents for Husqvarna K 770 Vac

  • Page 1 K 770 Vac Operator's manual 2-31...
  • Page 2: Table Of Contents

    Product description tasks. The product must only be used by professional operators with experience. This Husqvarna power cutter is a portable handheld cut- Note: National regulations can set limits to the operation off machine powered by a two-stroke combustion of the product.
  • Page 3 7. Starting instruction decal WARNING! Kickbacks can be sudden, rapid 8. Choke control and violent and can cause life threatening 9. Throttle trigger lockout injuries. Read and understand the instructions in the manual before using the 10. Rear handle Kickback on page 9 . product.
  • Page 4: Safety

    Note: Other symbols or decals on the product refer to certification requirements for some markets. Type plate XXXXXXXXX YYYY s / n YYYY WWXXXXX XXX XX XX-XX Husqvarna AB Huskvarna, SWEDEN XXXXXXXXXXX XXXXXXXXXXXX Safety Safety definitions WARNING: Used if there is a risk of injury or...
  • Page 5 fatal injury, we recommend persons with medical CAUTION: Used if there is a risk of damage implants to consult their physician and the medical to the product, other materials or the implant manufacturer before operating this product. adjacent area if the instructions in the •...
  • Page 6 • Use tight-fitting, heavy-duty and comfortable clothing are standing firmly. that permits full freedom of movement. Cutting generates sparks that can ignite clothing. Husqvarna • Observe your surroundings to ensure that nothing recommends that you wear flame-retardant cotton or can affect your control of the product.
  • Page 7 move back to their initial positions. This function locks 2. Push the throttle lockout and make sure it goes back the throttle trigger at idle speed. when you release it. 3. Make sure that the throttle trigger and throttle lockout move freely and that the return springs work To examine the throttle trigger lockout correctly.
  • Page 8 5. Release the throttle control and make sure that the and must always move freely and must always cutting blade stops and stays stationary. If the return instantly by spring force. cutting blade rotates at idle position, you must adjust •...
  • Page 9 4. Make sure that the blade guard can be pushed in 1. Make sure that there are no cracks or deformation and return instantly by spring force. on the vibration damping units. Replace the vibration damping units if they are damaged. 2.
  • Page 10 strong and you might not be able to control the power Rotational kickback cutter. A rotational kickback occurs when the cutting blade does not move freely in the kickback zone. Never move the product when the cutting equipment is rotating. Gyroscopic forces can obstruct the intended movement Kickback zone Never use the kickback zone of the blade for cutting.
  • Page 11 strong and you might not be able to control the power 2. Cut section "I" of the pipe. cutter. 3. Ensure that the cut opens to avoid pinching. 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.
  • Page 12: Assembly

    When refuelling, open the fuel cap slowly so that any • Only do the maintenance as this operator´s manual excess pressure is released gently. recommends. Let a Husqvarna service agent do all • Tighten the fuel cap carefully after refuelling. If the other servicing.
  • Page 13 WARNING: Never use a diamond blade to cut plastic material. The heat produced Husqvarna cutting blades are high speed cutting blades during cutting may melt the plastic and it can approved for hand held power cutters. stick to the cutting blade and cause a •...
  • Page 14 Replace the blade before it is worn out. To examine the spindle shaft and the flange washers CAUTION: Use only Husqvarna flange washers with a minimum diameter of 60 mm (2.36 in.). WARNING: Incorrect flange washers can...
  • Page 15 (B) and the flange washer (C). blade specification. Use only Husqvarna arbor bushings. • Make sure that the arbor bushing has the correct dimension for the cutting blade. The correct 3.
  • Page 16: Operation

    Operation Introduction product. The blade guard extender and the dust shield must always move freely. Do not use the product if the blade guard, blade WARNING: Before you operate the product, guard extender or dust shield are missing or carefully read and understand the safety defective.
  • Page 17 • Apply the cutting blade gently with high rotating • If Husqvarna two-stroke oil is not available, use a speed (full throttle). Maintain full speed until cutting two-stroke oil of good quality for air-cooled engines. is complete. Speak to your servicing dealer to select the correct •...
  • Page 18 Premixed fuel CAUTION: Do not mix fuel for more than 1 • Use Husqvarna premixed alkylate fuel of a good month at a time. quality, for best performance and extension of the engine life. This fuel contains less harmful chemicals...
  • Page 19 2. Pull the choke control fully and get the start throttle 6. Put your right foot on the lower section of the rear position. handle to push the product against the ground. 3. Push the decompression valve to decrease the pressure in the cylinder.
  • Page 20 To start the product with a warm 3. Push the decompression valve to decrease the pressure in the cylinder. The decompression valve engine goes back to its initial position when the product starts. WARNING: Make sure that the cutting blade can rotate freely.
  • Page 21: Maintenance

    • Move the STOP switch to the right to stop the engine. WARNING: Do not wind the starter rope around your hand. 7. Pull the starter rope slowly until you feel a resistance as the starter pawls engage. Then pull continuously and quickly.
  • Page 22 • Clean the cold air intake if it is necessary. 1. Loosen the 3 nuts on the cutting head. Loosen the belt tension with the adjuster screw. 2. Remove the screw and the nuts. Remove the front belt guard. To examine the spark plug Note: Always use the recommended spark plug type.
  • Page 23 5. Install the new drive belt. 2. Turn the adjuster screw clockwise to increase the tension of the drive belt. 3. Jiggle the blade guard (A) up and down 3–5 times. Tighten the nuts (B). 6. Make sure that the drive belt is put in correct position.
  • Page 24 To adjust the tension of the recoil 1. Hold the starter rope pulley with your thumb. Pull the starter rope approximately 30 cm and put it in the spring cut-out of the starter pulley. 1. Put the rope through the cut-out in the starter pulley. Wind the rope 3 turns clockwise around the center of the starter pulley.
  • Page 25 2. If it is necessary, replace the air filter. 3. If the engine continues to decrease in power or speed, speak to your Husqvarna servicing dealer. To examine the fuel system 1. Make sure that the fuel tank cap and its seal are not damaged.
  • Page 26: Troubleshooting

    Fuel filter CAUTION: Unhealty dust can be spread out during filter change. Wear approved The fuel filter is installed in the fuel tank. The fuel filter respiratory protection. Dispose filters prevents contamination of the fuel tank when the fuel correctly. tank is filled.
  • Page 27 Problem Cause Possible solutions To start the product with a Refer to cold engine on page 18 and To start The start procedure is done incor- the product with a warm engine on rectly. page 20 . The stop switch is in the right (STOP) Make sure that the stop switch The product does not start.
  • Page 28: Transportation, Storage And Disposal

    Discard all chemicals, such as engine oil or fuel, at a service center or at an applicable disposal location. • When the product is no longer in use, send it to a Husqvarna dealer or discard it at a recycling location. 705 - 002 - 12.11.2018...
  • Page 29: Technical Data

    Technical data Technical data K 770 Vac Cylinder displacement, cm (cu in.) 74 (4.5) Cylinder bore, mm (in.) 51 (2) Stroke, mm (in.) 36 (1.4) Idle speed, rpm 2700 Wide open throttle, no load, rpm 9300 (+/- 150) Power, kW (hp) @ rpm 3.7 (5.0) @ 9000...
  • Page 30 4 (0.16) 300 (12) 122 (4.8) 6200 (0.79) Technical data for dust extractors are not conclusively describing actual performance over time be- tween different dust extractors. For Husqvarna products OSHA objective data are available at 705 - 002 - 12.11.2018...
  • Page 31: Ec Declaration Of Conformity

    Husqvarna AB, SE–561 82 Huskvarna, Sweden, tel: +46–36–146500, declares under sole responsibility that the portable cut-off machine Husqvarna K 770 Vac, dating from 2018 serial numbers and onward (the year is clearly stated on the type plate, followed by the serial number), comply with the requirements of the COUNCIL’S DIRECTIVE:...
  • Page 32 Original instructions 1141098-26 2018-11-30...

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