268K/272K Operator’s Manual Read through the Operator’s Manual carefully and understand the contents before you use the power cutter.
SYMBOL EXPLANATION Symbols on the power cutter: WARNING! The power cutter can be dangerous! Careless and incorrect use can result in serious, even fatal injury. Read through the Operator's Manual carefully and understand the contents before you use the power cutter.
CONTENTS Before using your new Power cutter • Read the Operator’s Manual carefully. • Check the assembly and adjustment of the cutting disc, see chapter ”Assembly”. • Start the engine and check the carburettor settings. See chapter ”Maintenance”, section ”Carburettor”. When adjusted correctly the cutting disc should not rotate when idling. Setting the idling speed is described in the Operator’s Manual. Adjust the speed according to these instructions.
SAFETY INSTRUCTIONS ! WARNING! Incorrect or careless use of a power cutter can turn it into a dangerous tool that can cause serious or even fatal injury. It is extremely important that you read and understand this manual. PERSONAL SAFETY EQUIPMENT ! WARNING! When using a power cutter, safety equipment approved by the appropriate authorities must be used. Personal safety equipment does not eliminate the risk of accidents, however, it can reduce the effects of an injury in the event of an accident.
SAFETY INSTRUCTIONS 3 Silencer ! WARNING! During use and for some time after the silencer is very hot. Do not touch the silencer if it is hot! The silencer is designed to give the lowest possible noise level and to direct the engine‘s exhaust fumes away from the user. The engine‘s exhaust fumes are hot and can contain sparks, which can lead to the outbreak of fire.
SAFETY INSTRUCTIONS 3 Silencer Never use a machine that has a defective silencer. GENERAL SAFETY INSTRUCTIONS IMPORTANT INFORMATION! Do not use the power cutter until you have read the entire contents of this Operator’s Manual. All servicing, in addition to the points listed in the section ”Control, maintenance and service of the power cutter’s safety equipment”, should be carried out by trained service specialists. • Use the equipment recommended in the chapter ”Personal safety equipment”.
SAFETY INSTRUCTIONS Fuel safety GENERAL WORKING INSTRUCTIONS (Filling/Fuel mixture/Storage) This section takes up the basic safety precautions for working with the power cutter. Follow these general working instructions, but never use a machine without the possibility of calling for help in the event of an accident. ! WARNING! Exercise great care when handling fuel. Bear in mind the risk of fire, explosions and inhaling fumes. • Never fill the machine while the engine is running.
SAFETY INSTRUCTIONS ! Over exposure to vibrations can result in blood-vessel or nerve injury to persons suffering with blood circulation problems. Seek medical attention if you experience physical symptoms that can be related to over exposure to vibrations. Examples of such symptoms are numbness, lack of feeling, “tickling“, “pricking“, pain lack of or a reduction in normal strength, changes in the colour of the skin or its surfaces. These symptoms normally appear in the fingers, hands or wrists.
SAFETY INSTRUCTIONS Pull in Pull in occurs when the lower part of the disc is suddenly stopped or when the cut closes. (To avoid this see the section ”How to avoid kickback” and ”Pinching/rotation” below). Pinching/rotation Pinching occurs when the cut closes. The power cutter can be drawn suddenly and powerfully downwards. How to avoid pinching Support the work piece in such a way that the cut remains open during the cutting operation and when the cut is finished.
SAFETY INSTRUCTIONS CUTTING DISCS AND BLADES Abrasive discs The cutting material in an abrasive disc consists of abrasive corn that is held together by an organic bonding agent. ”Reinforced discs” are made up of a fabric or fibre base that prevents total breakage at maximum working speed if the disc should be cracked or damaged. (The term reinforced does not refer to those cutting discs that are only reinforced around the flange).
SAFETY INSTRUCTIONS Guard Cutting discs Check that the guard is not crack or shows signs of any other damage. Clean the inside of the guard before fitting a new disc. Check that the guard can be adjusted and locked. Type of cutting discs Check that the disc is approved for high speed, portable power cutters. Do not exceed the maximum working speed stated on the disc. 100 m/s 6300 rpm Diamond discs Damage • Ensure the disc it not cracked or damaged in any other way.
WHAT IS WHAT? 21 13 15 2 6 17 13 7 24 22 23 3 20 4 10 8 9 1 16 18 5 11 12 19 14 What is what on a power cutter? 1. Cutting trolley 13. Throttle 2. Upper guide section 14. Combination spanner 3. Locking lever for upper guide section 15. Air filter cover 4. Fuel tank 16. Disc guard 5. Splash guard 17. Starter handle 6. Choke 18. Support wheel 7. Throttle catch 19. Operator’s Manual 8. Stop switch 20. Adjustment lever for the disc guard 9.
ASSEMBLY Fitting the cutting head Fitting the cutting disc Husqvarna cutting discs are manufactured and approved for freehand cutting. The paper labels on each side of the disc are there to distribute the pressure from the flange washer and prevent the disc from slipping. Undo both nuts (1) on the cutting arm and the bolts (2). Remove the cutting arm and fit the drive belt on the clutch drum. Replace the cutting arm in position. Tighten the nuts and bolts.
FUEL HANDLING Fuel mixture ! WARNING! the power cutter is fitted with a two-stroke engine and must always be run on a mixture of petrol and two-stroke oil. To ensure the correct mixture proportions it is important to measure the quantity of oil accurately. When mixing small amounts of fuel small discrepancies in the amount of oil has a great bearing on the proportions of the fuel mixture. Always provide good ventilation when handling fuel.
START AND STOP Start and stop ! Start WARNING! Before starting observe the following: • Do not start the power cut without the cutting arm or cutting head fitted. Otherwise the clutch can come loose and cause personal injury. • Always move the power cutter from the filling area before starting. • Ensure that you and the machine stand firmly and that the cutting discs rotates freely. • Make sure no unauthorised persons are within the working area.
MAINTENANCE Adjusting the drive belt • The drive belt is fully enclosed and well protected from dust, dirt and mechanical effects during the cutting process. A • To tension the drive belt, slightly loosen the nuts (A), which secure the cutting head and belt guard. • Turn the tensioning screw so that the nut (B) is located directly under the arrow on the cover. Shake the head to ensure the spring can tension the belt. The belt now automatically has the right tension.
MAINTENANCE Carburettor Fine tuning Operation, Basic settings, Fine tuning • When the machine has been run-in the carburettor is finely tuned. Fine tuning should be carried out by trained personnel. The L-needle is adjusted first, then the idling screw T and finally the H-needle. The following speed recommendations apply: Max. speed Idling speed 10,000 rpm 2,500 rpm ! WARNING! The power cutter must be correctly assembled with cutting arm and cutting head before you start (See chapter ”Assembly”.
MAINTENANCE High speed needle H Fuel filter • The carburettor is equipped with an automatic speed governor, which prevents a too high peripheral speed on the cutting disc. At full throttle with a unloaded cutting disc distinctive variations in speed can be heard. This is usual and is only a sign that the speed governor is working. • The high speed needle H affects the power cutter’s output and should be set according to the recommended basic setting, H = 3/4 turn open.
MAINTENANCE Starter ! Tensioning the recoil spring WARNING! • The recoil spring sits in its tensioned position in the starter housing and can with careless handling fly out and cause personal injury. • When replacing the recoil spring or the starter cord great care should be exercised. Always wear protective glasses. Replacing a broken or worn starter cord • Lift up the starter cord from the cut out on the pulley and turn the pulley approx. 2 turns clockwise.
MAINTENANCE Spark plug The condition of the spark plug is affected by: • An incorrect carburettor setting. • An incorrect fuel mixture (too much oil). • A dirty air filter. Cooling system To maintain as low an operating temperature as possible the power cutter is equipped with a cooling system. The cooling system consists of: 0,5 mm These factors cause deposits on the spark plug electrode that may result in malfunction or starting difficulties.
MAINTENANCE 2 11 9 15 17 4 1 6 5 20 12 18 19 Below follows some general maintenance instructions. If you need further information please contact your service workshop. Daily maintenance 1. Check that throttle components work correctly from a safety view point (throttle and starter throttle catch). 2. Clean the pre-filter. 3. Check the tension of the drive belt. 4. Check the condition of the cutting disc. 5. Check the condition of the disc guard. 6.
TECHNICAL DATA 268K 272K 67 50 34 2.500 72,2 52 34 2.500 10.000 3,2/9 000 10.000 3,8/9 300 Electrolux ET NGK, BPMR 7A 0,5 Electrolux ET NGK, BPMR 7A 0,5 Tillotson HS 225 0,75 Tillotson HS 225 0,75 9,5 kg - 9,6 kg 10,1 kg 98 99,5 106 107 5,7 4,6 8,4 13,8 5,5 7,6 8,8 11,5 Engine Cylinder volume, cu.in/cm3 Cylinder bore, inch/mm Stroke, inch/mm Idle speed, rpm Recommended max.
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