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Operator′s manual
445 445e 450e
Please read the operator’s manual carefully and make sure you understand the instructions
before using the machine.
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E En ng glliis sh h
115 13 81-26 Rev.3 2009-01-14
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KEY TO SYMBOLS Symbols on the machine: Symbols in the operator’s WARNING! Chain saws can be manual: dangerous! Careless or incorrect use can Switch off the engine before result in serious or fatal injury to the carrying out any checks or operator or others. maintenance. CAUTION! The Please read the operator’s manual start/stop switch automatically carefully and make sure you returns to run position. In order to understand the instructions before prevent unintenti
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CONTENTS Contents KEY TO SYMBOLS Symbols on the machine: ..................................... 2 Symbols in the operator’s manual: ....................... 2 CONTENTS Contents ............................................................... 3 INTRODUCTION Dear Customer, .................................................... 4 WHAT IS WHAT? What is what on the chain saw? ........................... 5 GENERAL SAFETY PRECAUTIONS Before using a new ch
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INTRODUCTION Dear Customer, Congratulations on your choice to buy a Husqvarna product! Husqvarna is based on a tradition that dates back to 1689, when the Swedish King Karl XI ordered the construction of a factory on the banks of the Husqvarna River, for production of muskets. The location was logical, since water power was harnessed from the Huskvarna River to create the water- powered plant. During the more than 300 years of beeing, the Husqvarna factory has produced a l
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WHAT IS WHAT? What is what on the chain saw? 1 Cylinder cover 17 Muffler 2 Decompression valve 18 Chain 3 Air purge 19 Bar tip sprocket 4 Start reminder 20 Bar 5 Combined start and stop switch 21 Spike bumper 6 Rear handle 22 Chain catcher 7 Information and warning decal 23 Chain tensioning screw 8 Fuel tank 24 Clutch cover 9 Adjuster screws carburettor 25 Right hand guard 10 Starter handle 26 Throttle control 11 Starter 27 Throttle lockout 12 Chain oil tank 28 Chain tensioner wh
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GENERAL SAFETY PRECAUTIONS Before using a new chain saw WARNING! Never allow children to use or be in the vicinity of the machine. As the • Please read this manual carefully. ! machine is equipped with a spring- • Check that the cutting equipment is correctly fitted and loaded stop switch and can be started by adjusted. See instructions under the heading low speed and force on the starter Assembly. handle, even small children under some circumstances can pr
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GENERAL SAFETY PRECAUTIONS • Protective goggles or a visor Always use common sense • Gloves with saw protection It is not possible to cover every conceivable situation you • Trousers with saw protection can face when using a chain saw. Always exercise care and use your common sense. Avoid all situations which you • Boots with saw protection, steel toe-cap and non-slip consider to be beyond your capability. If you still feel sole uncertain about operating procedures after re
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GENERAL SAFETY PRECAUTIONS • The chain brake (A) can either be activated manually activated for long periods. The chain saw can become (by your left hand) or automatically by the inertia very hot. release mechanism. • The brake is applied when the front hand guard (B) is pushed forwards. • This movement activates a spring-loaded mechanism that tightens the brake band (C) around the engine drive system (D) (clutch drum). • To release the chain brake pull the front hand guard backwards, towar
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GENERAL SAFETY PRECAUTIONS If the kickback is less violent or the kickback zone of Will my chain brake always protect me the bar is closer to you the chain brake will be from injury in the event of a kickback? activated manually by the movement of your left hand. No. First, the chain brake must be in working order to provide the intended protection. Second, it must be activated during the kickback as described above to stop the saw chain. Third, the chain brake may be activated but if the
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GENERAL SAFETY PRECAUTIONS Right hand guard Stop switch Apart from protecting your hand if the chain jumps or Use the stop switch to switch off the engine. snaps, the right hand guard stops branches and twigs from interfering with your grip on the rear handle. Muffler The muffler is designed to keep noise levels to a minimum Vibration damping system and to direct exhaust fumes away from the user. Your machine is equipped with a vibration damping system that is designed to minimize vibration and
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GENERAL SAFETY PRECAUTIONS Cutting equipment designed to reduce Cutting equipment kickback This section describes how to choose and maintain your cutting equipment in order to: WARNING! Faulty cutting equipment or • Reduce the risk of kickback. the wrong combination of bar and saw ! • Reduce the risk of the saw chain breaking or jumping chain increases the risk of kickback! off the bar. Only use the bar/saw chain combinations we recommend, and follow the filing • Obtain optimal cutting per
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GENERAL SAFETY PRECAUTIONS • Number of drive links. The number of drive links is • A sharp chain eats its way through the wood and determined by the length of the bar, the chain pitch produces long, thick chips or shavings. and the number of teeth on the bar tip sprocket. • Bar groove width (inches/mm). The groove in the bar • The cutting part of the chain is called the cutter and must match the width of the chain drive links. consists of a cutting tooth (A) and the depth gauge (B). The cutt
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GENERAL SAFETY PRECAUTIONS Sharpening cutting teeth Adjustment of depth gauge setting To sharpen cutting teeth you will need a round file and a • The cutting teeth should be newly sharpened before file gauge. See instructions under the heading Technical adjusting the depth gauge setting. We recommend data for information on the size of file and gauge that are that you adjust the depth gauge setting every third recommended for the chain fitted to your chain saw. time you sharpen the cutting teeth.
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GENERAL SAFETY PRECAUTIONS 445 • Turn the knob anti clockwise to loosen the bar cover. • Loosen the bar nut that holds the clutch cover and chain brake. Use the combination spanner. Then retighten the bar nut as tightly as you can by hand. • Adjust the tension on the chain by turning the wheel down (+) for tighter tension and up (-) to loosen the tension. • Raise the tip of the bar and stretch the chain by tightening the chain tensioning screw using the combination spanner. Tighten the cha
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GENERAL SAFETY PRECAUTIONS Checking chain lubrication Lubricating cutting equipment • Check the chain lubrication each time you refuel. See WARNING! Poor lubrication of cutting instructions under the heading Lubricating the bar tip equipment may cause the chain to snap, sprocket. ! which could lead to serious, even fatal Aim the tip of the bar at a light coloured surface about injuries. 20 cm (8 inches) away. After 1 minute running at 3/4 throttle you should see a distinct line of oil on th
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GENERAL SAFETY PRECAUTIONS Chain drive sprocket Bar Check regularly: The clutch drum is fitted with one of the following drive sprockets: • Whether there are burrs on the edges of the bar. Remove these with a file if necessary. A Spur sprocket (the chain sprocket is welded on the drum) B Rim sprocket (replaceable) • Whether the groove in the bar has become badly worn. Replace the bar if necessary. Regularly check the degree of wear on the drive sprocket. Replace if wear is excessive. Repl
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ASSEMBLY should be tensioned until it does not sag from the Fitting the bar and chain underside of the bar. WARNING! Always wear gloves, when working with the chain. ! The chain is correctly tensioned when it does not sag from 445 the underside of the bar, but can still be turned easily by hand. Hold up the bar tip and tighten the bar nuts with the Check that the chain brake is in disengaged position by combination spanner. moving the front hand guard towards the front handle. Remove the b
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ASSEMBLY Fit the bar over the bar bolts. Place the bar in its rearmost Fitting a spike bumper position. Place the chain over the drive sprocket locate it To fit a spike bumper – contact your service agent. in the groove on the bar. Begin on the top edge of the bar. Make sure that the edges of the cutting links are facing forward on the top edge of the bar. Fit the clutch cover and locate the chain adjuster pin in the hole in the bar. Check that the drive links of the chain fit correctly over
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FUEL HANDLING Mixing ratio Fuel 1:50 (2%) with HUSQVARNA two-stroke oil. Note! The machine is equipped with a two-stroke engine 1:33 (3%) with oils class JASO FB or ISO EGB formulated and must always be run using a mixture of petrol and two- for air-cooled, two-stroke engines. stroke oil. It is important to accurately measure the amount of oil to be mixed to ensure that the correct Petrol, litre Two-stroke oil, litre mixture is obtained. When mixing small amounts of fuel, even small inaccur
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FUEL HANDLING • Move the machine at least 3 m from the refuelling Fuelling point before starting it. WARNING! Taking the following precautions, will lessen the risk of fire: ! Do not smoke and do not place any hot objects in the vicinity of fuel. Always stop the engine and let it cool for • Never start the machine: a few minutes before refuelling. 1 If you have spilt fuel or chain oil on the machine. Wipe off the spillage and allow remaining fuel to evaporate. When refuelling, open the fuel
