Husqvarna K950 Ring Operator's Manual

instructions before using the machine.

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 This product is in accordance with applicable EC directives. WARNING! Dust forms when cutting, this can cause injuries if inhaled. Use an approved breathing mask. Avoid inhaling petrol fumes and exhaust fumes. Always provide for good ventilation. WARNING! Sparks from the cutting blade can cause fire in combustible materials such as: petrol (gas), wood, dry grass etc. Noise emission to the environment according to the European Community’s Directive. The machine’s emission is specified in chapter Technical data and on label. Switch off the engine by moving the stop switch to the STOP position before carrying out any checks or maintenance. Always wear protective gloves. Regular cleaning is required. Visual check. Protective goggles or a visor must be worn. Run position. Stop, with the return spring to the operating position. Stop, in the fixed position. Other symbols/decals on the machine refer to special certification requirements for certain markets.

CONTENTS Contents KEY TO SYMBOLS Key to symbols ............................................................. 2 CONTENTS Contents ...................................................................... 3 WHAT IS WHAT? What is what on the power cutter? ............................... 4 SAFETY INSTRUCTIONS Steps before using a new power cutter. ....................... 5 Personal protective equipment ..................................... 5 Machine′s safety equipment ........................................ 6 Checking, maintaining and servicing the machine′s safety equipment .......................................................... 7 General safety precautions .......................................... 8 General working instructions ....................................... 9 SETTINGS AND ADJUSTMENTS Drive ............................................................................. 12 Fitting the blade ........................................................... 12 Dismantling the complete guide roller .......................... 14 Assembling the complete guide roller .......................... 14 Important notes: ........................................................... 15 Replacing the drive wheel ............................................ 15 Replacing the support rollers/guide rollers .................. 15 Water hose ................................................................... 15 FUEL HANDLING Fuel .............................................................................. 16 Mixing ratio ................................................................... 16 Fuelling ........................................................................ 16 STARTING AND STOPPING Starting and stopping ................................................... 17 MAINTENANCE Lubricating the guide rollers ......................................... 18 Adjusting the drive belt ................................................. 18 Belt tensioning/replacing the drive belt ........................ 18 Belt pulley and clutch ................................................... 18 Carburettor ................................................................... 18 Fuel filter ...................................................................... 19 Air filter ......................................................................... 19 Starter .......................................................................... 20 Spark plug .................................................................... 21 Cooling system ............................................................ 21 Muffler .......................................................................... 22 Reconstructing the blade ............................................. 22 General maintenance instructions ............................... 23 TECHNICAL DATA Technical data .............................................................. 24 Cutting equipment ........................................................ 24 Trouble shooting ........................................................... 25 EC-declaration of conformity ........................................ 26

WHAT IS WHAT? What is what on the power cutter? 4 5 6 7 8 11 10 12 13 15 16 17 18 19 21 9 14 1 2 3 2 1 22 23 27 26 25 24 28 29 30 31 33 3 7 14 15 20 32 1 Control for the guide rollers 2 Grease nipples 3 Blade guard/spray guard 4 Water connector 5 Locking button for the drive wheel 6 Diamond blade 7 Cover screws 8 Decompression valve 9 Air filter cover 10 Starter handle 11 Throttle lockout 12 Throttle control 13 Adjuster screws 14 Guide rollers 15 Support rollers 16 Drive wheel 17 Locking nuts for the support rollers 18 Water adjustment control 19 Warning decal 20 Choke 21 Start throttle lock 22 Stop switch 23 Rating plate 24 Fuel tank 25 Tool bag 26 Bearing grease 27 Combination spanner 28 19 mm combination spanner 29 4 mm hex key 30 5 mm hex key 31 6 mm hex key 32 Grease gun 33 Operator′s manual

SAFETY INSTRUCTIONS Steps before using a new power cutter. • Please read the operator’s manual carefully. • Check the cutting blade’s mounting, see the chapter ”Assembly”. • Start the engine and check the idling setting, see instructions under the heading Maintenance. When the carburettor is set correctly the cutting blade should be still while idling. Setting of the idle speed is described in the Operator’s Manual. Set the correct speed according to these instructions. Do not use the power cutter if the idle speed is not adjusted correctly! • Let your Husqvarna dealer regularly check the power cutter and make essential adjustments and repairs. Husqvarna Construction Products has a policy of continuous product development. Husqvarna reserves the right to modify the design and appearance of products without prior notice and without further obligation introduce design modifications. All information and all data in the Operator’s Manual were applicable at the time the Operator’s Manual was sent to print. Personal protective equipment • Protective helmet • Hearing protection • Protective goggles or a visor • Breathing mask • Heavy-duty, firm grip gloves. • Tight-fitting, heavy-duty and comfortable clothing that permits full freedom of movement. • Use leg-guards recommended for the material to be cut. • Boots with steel toe-caps and non-slip sole • Always have a first aid kit nearby. ! WARNING! Under no circumstances may the design of the machine be modified without the permission of the manufacturer. Always use genuine accessories. Non-authorized modifications and/or accessories can result in serious personal injury or the death of the operator or others. ! WARNING! Use of products which cut, grind, drill, sand or shape material can generate dust and vapors which may contain harmful chemicals. Know the nature of the material being worked on and wear appropriate dust mask or respirator protection. ! WARNING! A power cutter is a dangerous tool if used carelessly or incorrectly and can cause serious, even fatal injuries. It is extremely important that you read and understand the contents of this Operator’s Manual. ! WARNING! The ignition system of this machine produces an electromagnetic field during operation. This field may under some circumstances interfere with pacemakers. To reduce the risk of serious or fatal injury, we recommend persons with pacemakers to consult their physician and the pacemaker manufacturer before operating this machine. ! WARNING! 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.

SAFETY INSTRUCTIONS Machine′s safety equipment This section describes the machine′s safety equipment, its purpose, and how checks and maintenance should be carried out to ensure that it operates correctly. See the ”What is what?” section to locate where this equipment is positioned on your machine. Vibration damping system Your machine is equipped with a vibration damping system that is designed to minimize vibration and make operation easier. The machine′s vibration damping system reduces the transfer of vibration between the engine unit/cutting equipment and the machine′s handle unit. The engine body, including the cutting equipment, is insulated from the handles by vibration damping units. Stop switch Use the stop switch to switch off the engine. Muffler The muffler is designed to keep noise levels to a minimum and to direct exhaust fumes away from the user. Throttle lockout The throttle lockout is designed to prevent accidental operation of the throttle control. When you press the lock (A) (i.e. when you grasp the handle) it releases the throttle control (B). When you release the handle the throttle control and the throttle lockout both move back to their original positions. This movement is controlled by two independent return springs. This arrangement means that the throttle control is automatically locked at the idle setting. Blade guard This guard is fitted above the blade and is designed to prevent parts of the blade or cutting fragments from being thrown towards the user. ! WARNING! Never use a machine that has faulty safety equipment! Carry out the inspection, maintenance and service routines listed in this section. ! WARNING! The muffler gets very hot in use and remains so for a short time afterwards. Do not touch the muffler if it is hot! ! WARNING! The exhaust fumes from the engine are hot and may contain sparks which can start a fire. Never start the machine indoors or near combustible material! IMPORTANT INFORMATION For mufflers it is very important that you follow the instructions on checking, maintaining and servicing your machine. See instructions under the heading Checking, maintaining and servicing the machine’s safety equipment. ! WARNING! The inside of the muffler contain chemicals that may be carcinogenic. Avoid contact with these elements in the event of a damaged muffler. ! WARNING! Always check that the guard is correctly fitted before starting the machine. A B

SAFETY INSTRUCTIONS Checking, maintaining and servicing the machine′s safety equipment Vibration damping system Regularly check the vibration damping units for cracks or deformation. Make sure the vibration damping units are securely attached to the engine unit and handle unit. Keep the handles clean and dry. Stop switch Start the engine and make sure the engine stops when you move the stop switch to the stop setting. Muffler Never use a machine that has a faulty muffler. Regularly check that the muffler is securely attached to the machine. Throttle lockout • Make sure the throttle control is locked at the idle setting when the throttle lockout is released. • Press the throttle lockout and make sure it returns to its original position when you release it. • Check that the throttle control 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 under the heading Maintenance. ! WARNING! All servicing and repair work on the machine requires special training. This is especially true of the machine′s safety equipment. If your machine fails any of the checks described below you must contact your service agent. When you buy any of our products we guarantee the availability of professional repairs and service. If the retailer who sells your machine is not a servicing dealer, ask him for the address of your nearest service agent.

SAFETY INSTRUCTIONS Blade guard Check that the guard is complete and without any cracks or deformations. General safety precautions • A power cutter is designed to cut hard materials, such as masonry. Observe the increased risk of kickback when cutting soft materials. See instructions under the heading How to avoid kickback. • 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. • Never use the machine if you are tired, if you have consumed alcohol, or if you are taking other drugs or medication that can affect your vision, judgement or co- ordination. • Wear personal protective equipment. See instructions under the heading Personal protective equipment. • Never use a machine that has been modified in any way from its original specification. • Never use a machine that is faulty. Carry out the checks, maintenance and service instructions described in this manual. Some maintenance and service measures must be carried out by trained and qualified specialists. See instructions under the heading Maintenance. • Never allow anyone else to use the machine without first ensuring that they have understood the contents of the operator’s manual. Transport and storage Do not store or transport the power cutter with the blade fitted. Store the power cutter in a lockable area so that it is out of reach of children and unauthorised persons. The blade should be removed from the machine after use and stored well. Store the blade in the dry. Fuel safety (Refuelling/Fuel mixture/Storage.) • Never refuel the machine while the engine is running. • Make sure there is plenty of ventilation when refuelling or mixing fuel (petrol and 2-stroke oil). • Move the machine at least 3 m from the refuelling point before starting it. • Never start the machine: - If you have spilt fuel on it. Wipe off the spillage and allow remaining fuel to evaporate. - If you have spilt fuel on yourself or your clothes, change your clothes. Wash any part of your body that has come in contact with fuel. Use soap and water. - If the machine is leaking fuel. Check regularly for leaks from the fuel cap and fuel lines. • Store and transport the machine and fuel so that there is no risk of any leakage or fumes coming into contact with sparks or naked flames, for example, from electrical machinery, electric motors, electrical relays/switches or boilers. • Always store fuel in an approved container designed for that purpose. • When storing the machine for long periods the fuel tank must be emptied. Contact your local petrol station to find out where to dispose of excess fuel. • Always use a Husqvarna fuel container with an anti-spill valve. ! WARNING! Always check that the guard is correctly fitted before starting the machine. Also check that the blade is fitted correctly and is not damaged in anyway. A damaged blade can cause personal injuries. See instructions under the heading Assembly. IMPORTANT INFORMATION K950 Ring may only be used for wet cutting. The water cleans and cools both the blade and the component parts of the cutting equipment. ! WARNING! Take care when handling fuel. Bear in mind the risk of fire, explosion and inhaling fumes. ! WARNING! Bear in mind the risk of fire, explosion and inhaling fumes. Stop the engine before fuelling. Do not fill so that the fuel runs over. Wipe up all spillage on the ground and machine. If you spill fuel on yourself or your clothes. Change your clothes. Move the machine at least 3 metres away from the refuelling area before starting.

SAFETY INSTRUCTIONS General working instructions Basic safety rules • Look around you: - To ensure that people, animals or other things cannot affect your control of the machine. - To make sure that none of the above come into contact with the cutting blade. • Do not use the machine in bad weather, such as dense fog, rain, strong wind, intense cold, etc. Working in bad weather is tiring and can lead to dangerous conditions, e.g. slippery surfaces. • Never start to work with the power cutter before the working area is clear and you have a firm foothold. Look out for any obstacles with unexpected movement. Ensure when cutting that no material can become loose and fall, causing operating injury.Take great care when working on sloping ground. • Make sure that no clothes or parts of the body come in contact with the cutting equipment when it is rotating. • Keep at a safe distance from the cutting equipment when it is rotating. • The guard for the cutting equipment must always be lowered when the machine is running. • Ensure that the working area is sufficiently illuminated to create a safe working environment. • Do not move the machine when the cutting equipment is rotating. • Always ensure you have a safe and stable working position. • Make sure that no pipes or electrical cables are routed in the area to be cut. Follow the instructions above, but do not use a power cutter in a situation where you cannot call for help in case of an accident. Cutting • Start cutting with the machine running at maximum speed. • Always hold the machine in a firm grip with both hands. Hold it so that the thumbs and fingers grip round the handles. Cutting technique The technique described below is of a general character. • Support the work piece in such a way that it is possible to predict what will happen, and so that the cut remains open while cutting. • Check that the blade is not in contact with anything when the machine is started. • Always cut at maximum speed. • Start cutting smoothly, allowing the machine to work without forcing or pressing in the blade. • Move the blade slowly backwards and forwards to give a small contact surface between the blade and material to be cut. This will mean the blade temperature is kept down resulting in efficient cutting. ! WARNING! This section describes basic safety directions for using a power cutter. This information is never a substitute for professional skills and experience. If you get into a situation where you feel unsafe, stop and seek expert advice. Contact your dealer, service agent or an experienced power cutter user. Do not attempt any task that you feel unsure of! IMPORTANT INFORMATION Never work with a power cutter that is damaged or incorrectly adjusted. Check that the blade stops rotating when the throttle is released. ! WARNING! Only use the machine in areas with good ventilation. Neglect can result in serious injury or death. ! WARNING! The safety distance for the power cutter is 15 metres. You are responsible to ensure that animals and onlookers are not within the working area. Do not start cutting until the working area is clear and you are standing firmly. ! WARNING! Overexposure to vibration can lead to circulatory damage or nerve damage in people who have impaired circulation. Contact your doctor if you experience symptoms of overexposure to vibration. Such symptoms include numbness, loss of feeling, tingling, pricking, pain, loss of strength, changes in skin colour or condition. These symptoms normally appear in the fingers, hands or wrists. The risk increases at low temperatures.

SAFETY INSTRUCTIONS • Use a small part of the blade’s cutting area. • Feed the machine in line with the blade. Side pressure can destroy the blade and is extremely dangerous. Cutting depth K950 Ring can cut up to a depth of 260 mm (10 inches). Making a guide cut of 50-70 mm (2-3 inches) first, gives you better control of the machine. This means the water disc can penetrate into the workpiece and help control the machine. Attempting to saw the entire depth in one run takes longer. Working with several runs, 3 to 4 when the cut is 260 mm (10 inches) in depth, is much quicker. Large work Cuts exceeding 1 m - secure a batten along the line to be cut. The batten acts as a guide. Use this guide to make a marking cut along the entire length of the cut, 50-70 mm (2-3 inches) in depth. Remove the guides once the marking cut has been made. Small work First make a shallow marking cut, max 50-70 mm (2-3 inches) in depth. Now make the final cut. Cutting sequence First make the lower horizontal cut. Now make the two vertical cuts. Finish with the upper horizontal cut. Remember to divide the blocks up into manageable pieces so that they can be transported and lifted safely. CAUTION! If the upper horizontal cut is made before the lower horizontal cut, the work piece will fall on the blade and jam it. How to avoid kickback What is kickback? The word kickback is used to describe the sudden reaction that causes the power cutter and cutting blade to be thrown from an object when the upper quadrant of the blade, known as the kickback zone, touches an object. Kickback only occurs when the cutting blades kickback zone touches an object. ! WARNING! Do not pull the power cutter to one side, this can cause the blade to jam or break resulting in injury to people. ! WARNING! Kickback can happen very suddenly and violently; kicking the power cutter and cutting blade back at the user. If this happens when the cutting blade is moving it can cause very serious, even fatal injuries. It is vital you understand what causes kickback and that you can avoid it by taking care and using the right working technique.

SAFETY INSTRUCTIONS General rules • Never start to cut with the upper quadrant of the blade as shown in the figure, also known as the kickback zone. • Keep a good balance and a firm foothold. • Always hold the machine in a firm grip with both hands. Hold it so that the thumbs and fingers grip round the handles. • Stand at a comfortable distance from the work piece. • Always cut at maximum speed. • Take care when inserting the blade in an existing cut. • Never cut above shoulder height. • 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. Pull in Pull in occurs when the disc’s lower section suddenly stops or when the cut closes. (To avoid, see the heading ”Basic rules” and ”Jamming/rotation”, here below.) Pinching/rotation If the cut is pressed together this can lead to jamming. The machine can be pulled down suddenly with a very powerful jerk. 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. Check the engine speed Use a revolution counter regularly to check the engine speed at the working temperature, at full throttle and without a load. Diamond blades Diamond blades consist of a steel body provided with segments that contain industrial diamonds. Always use a sharp diamond blade. Sharpen the blade by cutting in a soft material such as sandstone or brick. Diamond blades are available in several hardness classes. A "soft" diamond blade has a relatively short service life and large cutting capacity. It is used for hard materials such as granite and hard concrete. 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. Diamond blades are ideal for masonry, reinforced concrete and other composite materials. Diamond blades are not recommended for cutting metal. Water cooling Diamond blades should be sprinkled with water while cutting to cool the blade and to bind dust that forms while cutting. Sharpening diamond blades Diamond blades can become dull when the wrong feeding pressure is used or when cutting certain materials such as heavily reinforced concrete. Working with a dull blade causes overheating and finally the loss of a segment (part of a cutting blade). Sharpen the blade by cutting in a soft material such as sandstone or brick. Vibrations on diamond blades The blade can become out of round and vibrate if a too high feed pressure is used. A lower feed pressure can stop the vibration. Otherwise replace the blade. The blade shall be intended for the material to be cut. ! WARNING! The unit must be adjusted at an authorised service workshop before it may be used, if the speed is higher than that stated. ! WARNING! Cool diamond blades continuously with water to prevent overheating that can cause the diamond blade to break and pieces being thrown off resulting in injury and damage.

SETTINGS AND ADJUSTMENTS Drive On account of the machine’s unique design the driving power is not transferred at the centre of the blade. The flanges on the two guide rollers run in the blade’s groove. Springs on the guide rollers press out the rollers, which in turn press the V- shaped edge on the inside diameter of the blade against the V-shaped groove in the drive wheel. The drive wheel is fitted on an axle which is driven by the engine via a drive belt. This allows a total cutting depth of 260 mm (10 inches) with a 350 mm (14 inches) diamond blade. 1 Blade 2 Support rollers 3 Drive wheel 4 Guide rollers 5 V-shaped edge Checking wear As the blade is used the inside diameter and the groove in the drive wheel become worn. The ring cutter will also work well in the future if: • the drive wheel is not too worn A) New B) Worn • the guide rollers are not too worn A) New B) Worn • adjustment between the rollers and blade is correct. The roller setting should be checked twice during the life of the diamond blade, once after fitting the blade and when the blade is semi worn. Fitting the blade We offers a number of blades for different materials in its range. Check with your Husqvarna dealer to see which blades are best suited for your usage. • Wipe off any dirt from the surface of the blade. • Loosen the locking nuts on the support roller cover. • Unscrew the adjuster screws a few turns. • Loosen the knob to offload the springs. • Remove the four screws holding the support roller guard using a 6 mm hex key and lift off the cover. ! WARNING! It is forbidden to reconstruct a used blade. A used blade may be weakened. A reconstructed blade can crack or break into pieces and seriously injury the operator or other persons. ! WARNING! Check that the blade is not damaged before fitting it on the machine. Damaged blades can disintegrate and cause serious personal injury.

SETTINGS AND ADJUSTMENTS • Fit the blade. CAUTION! The blade has a groove (A) on one side that acts a the guide groove for the support rollers. Ensure that the V-shaped edge of the blade enters the drive wheel and that the blade’s guide groove fits in the guide rollers. Also see under the heading Drive. • Press in the guide roller if necessary, so that it climbs into the groove on the blade. • Fit the support roller cover. Now tighten the four screws fully. • Rotate the blade and make sure that the support rollers are not clamped against the blade. • Adjust the adjuster screws so that the support rollers make contact against the blade. • Adjust so you can easily stop the support rollers using your thumb when the blade is rotated. The support rollers should only follow the blade occasionally. • Tighten the locking nuts on the support roller guard. • Rotate the blade and make sure you can still hold the rollers with your thumb when the blade is rotated. CAUTION! The machine should be upright. If the machine lies on its side the weight of the blade makes it difficult to make a correct adjustment. • Tighten the knobs fully and the machine is ready to use.

SETTINGS AND ADJUSTMENTS Dismantling the complete guide roller • Remove the support roller cover. • Lift off the blade. • Unscrew the knob. First turn the knob a few turns until you feel a resistance. The guide roller then follows the knob out and stops when it feels a resistance. The guide roller is pressed into the knob. In order to loosen the guide roller, you need to continue turning the knob until it loosens completely. The guide roller can now be pulled out of the chassis Assembling the complete guide roller • Screw the knob until it bottoms, and then loosen the knob 2 turns. • Insert the guide roller in the chassis • Now press the guide roller into the knob. • Lubricate the guide roller’s sleeve using grease. Fit the grease gun on the grease nipples (A) and pump in grease until clean grease emerges from the overflow hole (B). • Fit the blade. See the heading Fitting the blade. B A

SETTINGS AND ADJUSTMENTS Important notes: • Incorrect adjustment can result in damage to the blade. • If the blade rotates slowly or stops, stop cutting immediately and trouble shoot. Replacing the drive wheel 1 Lock the axle using the locking button. 2 Loosen the centre screw and remove the washer. 3 You can now lift off the drive wheel. CAUTION! Replace the drive wheel when fitting a new blade. A worn drive wheel can result in the blade slipping and becoming damaged. Inadequate water flow drastically shortens the life of the drive wheel. Replacing the support rollers/guide rollers • Remove the support roller cover. • Check the rollers for wear. • Use a 19 mm spanner and 5 mm hex key to replace the rollers. • Lubricate using bearing grease inside the rollers before the new rollers are fitted. • Replace the guide rollers when half of the flange on the rollers is worn. A) New B) Worn • Replace the support rollers when the roller surface is flat, (or) when the groove on the roller surface has worn away. A) New B) Worn Water hose Connect the water hose to the water supply. The water flow is activated by opening the check valve. Minimum water flow: 4 l/min Note that the machine’s hose nipple is fitted with a filter.

FUEL HANDLING Fuel CAUTION! The machine is equipped with a two-stroke engine and must always been run using a mixture of petrol and two- stroke engine oil. It is important to accurately measure the amount of oil to be mixed to ensure that the correct mixture is obtained. When mixing small amounts of fuel, even small inaccuracies can drastically affect the ratio of the mixture. Petrol • Use good quality unleaded or leaded petrol. • The lowest octane recommended is 90 (RON). If you run the engine on a lower octane grade than 90 so-called knocking can occur. This gives rise to a high engine temperature, which can result in serious engine damage. Two-stroke oil • For best results and performance use HUSQVARNA two- stroke engine oil, which is specially formulated for our air- cooled two-stroke engines. • Never use two-stroke oil intended for water-cooled outboard engines, sometimes referred to as outboard oil. • Never use oil intended for four-stroke engines. Mixing ratio 1:50 (2%) with HUSQVARNA two-stroke oil or equivalent. 1:33 (3%) with oils class JASO FB or ISO EGB formulated for air-cooled, two-stroke engines. Mixing • Always mix the petrol and oil in a clean container intended for fuel. • Always start by filling half the amount of the petrol to be used. Then add the entire amount of oil. Mix (shake) the fuel mixture. Add the remaining amount of petrol. • Mix (shake) the fuel mixture thoroughly before filling the machine’s fuel tank. • Do not mix more than one month’s supply of fuel at a time. • If the machine is not used for some time the fuel tank should be emptied and cleaned. Fuelling • Keep the handle dry and free from oil and fuel. • Clean around the fuel cap. Clean the fuel tank regularly. The fuel filter should be changed at least once a year. Contamination in the tank causes malfunction. • Ensure that the fuel is well mixed by shaking the container before filling the tank. • Always exercise care when refilling the fuel. Move the machine at least three metres from the fuelling area before it is started. Check that the fuel cap is tightened correctly. ! WARNING! Always ensure there is adequate ventilation when handling fuel. Petrol, litre Two-stroke oil, litre 2% (1:50) 3% (1:33) 5 0,10 0,15 10 0,20 0,30 15 0,30 0,45 20 0,40 0,60 ! WARNING! Taking the following precautions, will lessen the risk of fire: Do not smoke or place hot objects near fuel. Always shut off the engine before refuelling. When refuelling, open the fuel cap slowly so that any excess pressure is released gently. Tighten the fuel cap carefully after refuelling. Always move the machine away from the refuelling area before starting.

STARTING AND STOPPING Starting and stopping Starting a cold engine Ignition: Slide the ignition switch to the left. Choke: Pull the choke control fully out. Throttle lockout: Press in the throttle trigger lock, throttle control and then the start throttle lock (A). Release the throttle control and it is locked in the half throttle position. The lock releases when the throttle control is pressed in fully. 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. Starting a warm engine Use the same starting procedure as for a cold engine but without setting the choke control in the choke position. Starting 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. Never twist the starter cord around your hand. Grip the starter handle, slowly pull out the cord with your right hand until you feel some resistance (the starter pawls grip), now quickly and powerfully pull the cord. CAUTION! Do not pull the starter cord all the way out and do not let go of the starter handle when the cord is fully extended. This can damage the machine. When the engine starts, quickly apply full throttle to automatically disengage fast idle. Stopping The engine is stopped by switching the ignition off using the stop switch. ! WARNING! Note the following before starting: Do not start the power cutter without the belt guard fitted. Otherwise the clutch could come loose and cause personal injuries. Always move the machine away from the refuelling area before starting. Ensure that you and the machine have a good working stance and that the cutting blade can rotate freely. Keep people and animals well away from the working area. ! WARNING! The cutting blade rotates when the engine is started. Make sure it can rotate freely.

MAINTENANCE Lubricating the guide rollers • Connect the grease gun to the grease nipples. • Pump in grease until clean grease emerges from the overflow hole. Adjusting the drive belt The drive belt is fully enclosed and well-protected from dust, dirt and mechanical damage when cutting. • Dismantle the cover and loosen the belt tensioning screw. • Press on the belt tensioner with your thumb to tension the belt. Now tighten the screw holding the belt tensioner. Belt tensioning/replacing the drive belt • Dismantle the cover and loosen the belt tensioning screw. Push back the belt tensioning roller and install a new drive belt. CAUTION! Make sure that both belt pulleys are clean and undamaged before a new drive belt is fitted. • Press on the belt tensioner with your thumb to tension the belt. Now tighten the screw holding the belt tensioner. • Fit the belt cover. Belt pulley and clutch Never start the engine when the belt pulley and clutch are removed for maintenance. Carburettor Your Husqvarna product has been designed and manufactured to specifications that reduce harmful emissions. The carburettor is equipped with fixed needles to ensure the machine always receives the correct mixture of fuel and air. When the engine lacks power or accelerates poorly, do the following: • Check the air filter and replace if necessary. • When this does not help, contact an authorised service workshop. ! WARNING! Never use the power cutter without a blade guard over the cutting blade.

MAINTENANCE Adjusting the idle speed (T) Adjust the idle speed using the idle adjustment screw T, if it is necessary to readjust. First turn the idle adjustment screw T clockwise until the cutting attachment starts to rotate. Then turn the screw anticlockwise until the cutting attachment stops. The idle speed is correctly adjusted when the engine will run smoothly in every position. The idle speed should also be well below the speed at which the cutting attachment starts to rotate. Rec. idle speed 2500 rpm Fuel filter • The fuel filter sits inside the fuel tank. • The fuel tank must be protected from contamination when filling. This reduces the risk of operating disturbances caused by blockage of the fuel filter located inside the tank. • The filter cannot be cleaned but must be replaced with a new filter when it is clogged. The filter should be changed at least once per year. Air filter Air filters must be regularly cleaned to remove dust and dirt in order to avoid: • Carburettor malfunctions • Starting problems • Loss of engine power • Unnecessary wear to engine parts. • Excessive fuel consumption. The air filter system consists of an oiled foam plastic filter (1) and a paper filter (2): An air filter that has been in use for a long time cannot be cleaned completely. The filter must therefore be replaced with a new one at regular intervals. A damaged air filter must always be replaced. Cleaning the foam plastic filter The foam plastic filter is easily accessible under the filter cover A. This filter should be checked weekly and replaced if necessary. In order to obtain a good filtering effect, the filter must be replaced regularly or cleaned and oiled. A special HUSQVARNA oil has been produced for this purpose. Remove the foam plastic filter. Wash the filter well in tepid soapy water. After cleaning, rinse the filter well in clean water. Squeeze out and allow the filter to dry. NOTE! High pressure compressed air can damage the foam. After cleaning the foam plastic filter needs to be oiled. See instructions under the heading Oiling the foam plastic filter. Oiling the foam plastic filter Put the filter in a plastic bag and pour the filter oil over it. Knead the plastic bag to distribute the oil. Squeeze the excess oil out of the filter inside the plastic bag and pour off the excess before fitting the filter to the machine. Never use common engine oil. This would drain through the filter quite quickly and collect in the bottom. Paper filter The paper filter is accessible under cover B. This filter should be checked weekly and replaced when necessary. The paper filter can not be cleaned and must not be washed. ! WARNING! If the idle speed cannot be adjusted so that the cutting attachment stops, contact your dealer/service workshop. Do not use the machine until it has been correctly adjusted or repaired. IMPORTANT INFORMATION Poor maintenance of the air filter will cause carbon build-up on the spark plug and abnormal wear to engine parts. T

MAINTENANCE Starter Changing a broken or worn starter cord • Loosen the screws that hold the starter against the crankcase and remove the starter. Pull the cord out about 30 cm and lift it into the cut-out in the periphery of the starter pulley. When the cord is intact: Release the spring tension by letting the pulley rotate slowly backwards. • Remove any remnants of the old starter cord and check that the return spring works. Insert the new starter cord through the hole in the starter housing and in the cord pulley. • 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. Guide the cord through the cut-out in the periphery of the pulley and wind the cord 3 times clockwise around the centre of the starter pulley. Now pull the starter handle and in doing so tension the spring. Repeat the procedure once more, but this time with four turns. Note that the starter handle is drawn to its correct home position after tensioning the spring. Check that the spring is not drawn to its end position by pulling out the starter line fully. Slow the starter pulley with your thumb and check that you can turn the pulley at least a further half turn. Tensioning the recoil spring • Hook the starter cord in the notch in the pulley and turn the starter pulley about 2 turns clockwise. Remove the cord from the cut-out on the starter pulley and offload the spring tension by letting the pulley slowly rotate backwards. CAUTION! Check that the pulley can be turned at least a further 1/2 turn when the starter cord is pulled all the way out. Changing a broken recoil spring • Loosen the screws that hold the starter against the crankcase and remove the starter. • Undo the bolt in the centre of the pulley and remove the pulley. ! 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. Always be careful when changing the recoil spring or the starter cord. Always wear protective goggles.

MAINTENANCE • Loosen the bolts holding the spring cassette. • Remove the recoil spring by turning the starter over and loosen the hooks, with the help of a screwdriver. The hooks hold the return spring assembly on the starter. Bear in mind that the return spring lies tensioned in the starter housing. If the spring flies out during assembly, it is wound working from the outside towards the centre. • Lubricate the recoil spring with light oil. Fit the pulley and tension the recoil spring. Fitting the starter • To fit the starter, first pull out the starter cord and place the starter in position against the crankcase. Then slowly release the starter cord so that the pulley engages with the pawls. • Fit and tighten the screws that hold the starter. Spark plug The spark plug condition is influenced by: • Incorrect carburettor adjustment. • Wrong fuel mixture (too much oil). • A dirty air filter. These factors cause deposits on the spark plug electrodes, which may result in operating problems and starting difficulties. • If the machine is low on power, difficult to start or runs poorly at idle speed: always check the spark plug first before taking any further action. If the spark plug is dirty, clean it and check that the electrode gap is 0.5 mm. The spark plug should be replaced after about a month in operation or earlier if necessary. CAUTION! Always use the recommended spark plug type! Use of the wrong spark plug can damage the piston/cylinder. Cooling system To keep the working temperature as low as possible the machine is equipped with a cooling system. The cooling system consists of: 1 Air intake on the starter. 2 Air guide plate. 3 Fins on the flywheel. 4 Cooling fins on the cylinder. 5 Cylinder cover Clean the cooling system with a brush once a week, more often in demanding conditions. A dirty or blocked cooling system results in the machine overheating which causes damage to the piston and cylinder.

MAINTENANCE Muffler The muffler is designed to reduce the noise level and to direct the exhaust gases away from the operator. The exhaust gases are hot and can contain sparks, which may cause fire if directed against dry and combustible material. Never use a machine with a defective muffler. Reconstructing the blade ! WARNING! Ring cutter blades must not be reconstructed. Due to its design, a ring cutter blade is exposed to other strains than a centre driven 14 inch diamond blade. Firstly, the drive wheel is driven on the inner diameter of the blade so that both the surfaces of the drive wheel and the blade are exposed to wear. The core of the blade becomes thinner and the guide wider, which prevents the blade being driven by the wheel. Secondly, the blade is exposed to loads from the rollers and from the actual cutting process when the blade is not held completely straight. Strain builds up in the blade until it cracks or breaks if it has been reconstructed. A shattered blade can cause serious personal injuries to the user or other persons. For this reason Husqvarna does not approve ring cutting blades that have been reconstructed. Contact your Husqvarna dealer for instructions.

MAINTENANCE General maintenance instructions Below you will find some general maintenance instructions. If you have more questions, contact your service agent. Daily maintenance 1 Lubricate the guide rollers. 2 Check that the components of the throttle control work smoothly (throttle control and throttle trigger lock). 3 Check the guide rollers for wear when replacing the blade. Dismantle the complete guide roller. Clean and grease them for the best effect. 4 Check the support rollers for wear. 5 Check the condition of the blade and the drive gear. 6 Check the condition of the blade guard. 7 Check the starter and starter cord and clean the outside of the starter unit’s air intake. 8 Check that nuts and screws are tight. 9 Check that the stop switch works correctly. Weekly maintenance 10 Check, clean or replace the main filter. 11 Check the tension of the drive belt. 12 Clean the spark plug. Check that the electrode gap is 0.5 mm. 13 Clean the fins on the flywheel. Check the starter and the recoil spring. 14 Clean the cooling fins on the cylinder. 15 Check that the muffler is securely attached and not damaged. 16 Check and clean the water disc and water inlet screen. Monthly maintenance 17 Check the clutch centre, drive gear and clutch spring for wear. 18 Clean the outside of the carburettor. 19 Check the fuel filter and the fuel hose. Replace if necessary. 20 Clean the inside of the fuel tank. 21 Check all cables and connections. 4 14 19 18 12 20 5 6 3 4 3 3 15 17 2 9 10 13 21 7 1 11 16

TECHNICAL DATA Technical data Note 1: Noise emissions in the environment measured as sound power (LWA) in conformity with EC directive 2000/14/EC. Note 2: Equivalent sound pressure level is calculated as the time-weighted energy total for sound pressure levels under various working conditions with the following time distribution: 1/2 idling and 1/2 max speed. Cutting equipment Engine K950 Ring Cylinder displacement, cm3 93,6 Cylinder bore, mm 56 Stroke, mm 38,0 Idle speed, rpm 2500 Recommended max. fast idle speed, rpm 9750±250 Power, kW/ rpm 4,5 Ignition system Type of ignition system CD Spark plug NGK BPMR 7A Electrode gap, mm 0,5 Fuel and lubrication system Manufacturer of carburettor Tillotson Carburettor type HS 282A Fuel tank capacity, litre 1,0 Weight Power cutter without fuel and blade, kg 13,1 Noise emissions (see note 1) Sound power level, measured dB(A) 117 Sound power level, guaranteed LWA dB(A) 118 Sound levels (see note 2) Equivalent sound pressure level at the operator’s ear, measured according to EN 1454 dB(A) 103 Vibration levels Handle vibrations measured according to ISO 19432 Front handle, equivalent value, m/s2 3,9 Bakre håndtag, ekvivalentverdi, m/s2 8,3 Max. peripheral speed, m/s 55 Blade diameter, mm/inches 350/14” Cutting depth, mm/inches 260/10” Max. engine speed, rpm 10000 Blade weight, kg 0,8 Dimensions Height, mm 410 Length, mm 715 Width, mm 260 Water consumption, litres/min 4

TECHNICAL DATA Trouble shooting Mechanics Symptom Probable cause The blade does not rotate. 1 Roller knobs not tightened fully. 2 The blade not fitted on guide rollers correctly. 3 Rollers tensioned too much. The blade rotates too slowly. 1 Roller knobs not tightened fully. 2 Worn drive wheel. 3 The V-shaped inner diameter of the blade is worn. 4 The springs on the guide rollers are weakened. 5 Defective roller bearings. The blade jumps out of its position. 1 Roller setting too loose. 2 Worn guide rollers. 3 The blade not fitted on guide rollers correctly. 4 Damaged blade. The blade warps. 1 Rollers tensioned too much. 2 Blade overheating. Segments break. 1 Bent, twisted or badly maintained blade. 2 Continue to use the blade only if one segment is missing or leave for reconstruction when the blade is worn max 50 %. The blade cuts too slowly. 1 Wrong blade for the material in question. The blade slips. 1 The guide rollers does not move in and out freely. A seized roller can not press the blade hard enough against the drive wheel. 2 Worn drive wheel. Abrasive material and too little water when cutting increases the wear on the wheel. 3 Worn guide roller flange. When more than half of the width of the flange is worn the blade slips. 4 The blade’s groove and inner edge are worn. Caused by inferior flushing of abrasive material and/or a worn drive wheel causing the blade to slip.

TECHNICAL DATA ´®z+R<|¶69¨ ´®z+R<|¶69¨ EC-declaration of conformity (Applies to Europe only) Husqvarna Construction Products, SE-433 81 Partille, Sweden, tel: +46-31-949000, declares under sole responsibility that the power cutter K950 Ring from year 2006 serial numbers and onward (the year is clearly stated in plain text on the rating plate with subsequent serial number) conforms with the requirements of the COUNCIL’S DIRECTIVE: • of June 22, 1998 ”relating to machinery” 98/37/EC, annex IIA. • of May 3, 1989 ”relating to electromagnetic compatibility” 89/336/EEC, and applicable supplements. • of May 8, 2000 ”relating to the noise emissions in the environment” 2000/14/EC. Conformity assessment according to Annex V. For information relating to noise emissions, see the chapter Technical data. The following standards have been applied: SS-EN ISO 12100:2003, EN-ISO 55012:2002, EN 1454, ISO 19432 SMP Svensk Maskinprovning AB, Fyrisborgsgatan 3, SE-754 50 Uppsala, Sweden, has carried out voluntary type approval with regard to directive 2000/14/EC. The certificate has the number: 01/169/011 – K950 Ring. Partille November 14, 2006 Ove Donnerdal, Development Manager