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GENERAL SAFETY PRECAUTIONS

English

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 13

115 13 81-95 Rev.3 2008-12-15

Sharpening cutting teeth

To sharpen cutting teeth you will need a round file and a 
file gauge. See instructions under the heading Technical 
data for information on the size of file and gauge that are 
recommended for the chain fitted to your chain saw.

Check that the chain is correctly tensioned. A slack 
chain will move sideways, making it more difficult to 
sharpen correctly.

Always file cutting teeth from the inside face. Reduce 
the pressure on the return stroke. File all the teeth on 
one side first, then turn the chain saw and file the teeth 
on the other side.

File all the teeth to the same length. When the length 
of the cutting teeth is reduced to 0.16 inch (4 mm) the 
chain is worn out and should be replaced.

General advice on adjusting depth gauge setting

When you sharpen the cutting tooth (A) the depth 
gauge setting (C) will decrease. To maintain optimal 
cutting performance the depth gauge (B) has to be 
filed down to achieve the recommended depth gauge 
setting. See instructions under the heading Technical 
data to find the correct depth gauge setting for your 
particular chain.

Adjustment of depth gauge setting

The cutting teeth should be newly sharpened before 
adjusting the depth gauge setting. We recommend 
that you adjust the depth gauge setting every third 
time you sharpen the cutting teeth. NOTE! This 
recommendation assumes that the length of the 
cutting teeth is not reduced excessively.

You will need a flat file and a depth gauge tool. We 
recommend that you use our depth gauge tool to 
acheive the correct depth gauge setting and bevel for 
the depth gauge.

Place the depth gauge tool over the chain. Detailed 
information regarding the use of the depth gauge tool, 
will be found on the package for the depth gauge tool. 
Use the flat file to file off the tip of the depth gauge that 
protrudes through the depth gauge tool. The depth 
gauge setting is correct when you no longer feel 
resistance as you draw the file along the depth gauge 
tool.

Tensioning the chain

The more you use a chain the longer it becomes. It is 
therefore important to adjust the chain regularly to take up 
the slack.

Check the chain tension every time you refuel. NOTE! A 
new chain has a running-in period during which you 
should check the tension more frequently.

Tension the chain as tightly as possible, but not so tight 
that you cannot pull it round freely by hand.

!

WARNING! The risk of kickback is 
increased if the depth gauge setting is 
too large!

!

WARNING! A slack chain may jump off 
the bar and cause serious or even fatal 
injury.

Summary of Contents for 115 13 81-95

Page 1: ...g g gl l l li i i is s s sh h h h 115 13 81 95 Rev 3 2008 12 15 445 445e 450e Operator s manual EPA III Please read the operator s manual carefully and make sure you understand the instructions before using the machine ...

Page 2: ...s Symbols in the operator s manual Switch off the engine before carrying out any checks or maintenance CAUTION The start stop switch automatically returns to run position In order to prevent unintentional starting the spark plug cap must be removed from the spark plug when assembling checking and or performing maintenance Always wear approved protective gloves Regular cleaning is required Visual c...

Page 3: ...TOPPING Starting and stopping 21 WORKING TECHNIQUES Before use 23 General working instructions 23 How to avoid kickback 29 MAINTENANCE General 31 Carburetor adjustment 31 Checking maintaining and servicing chain saw safety equipment 31 Muffler 33 Starter 34 Air filter 35 Spark plug 36 Lubricating the bar tip sprocket 36 Needle bearing lubrication 36 Cooling system 36 Air Injection centrifugal clea...

Page 4: ...lop manufacture and market high quality motor driven products for forestry and gardening as well as for building and construction industry Your purchase gives you access to professional help with repairs and service whenever this may be necessary If the retailer who sells your machine is not one of our authorized dealers ask for the address of your nearest servicing dealer It is our wish that you ...

Page 5: ...crews carburetor 10 Starter handle 11 Starter 12 Chain oil tank 13 Product and serial number plate 14 Felling direction mark 15 Front handle 16 Front hand guard 17 Muffler 18 Chain 19 Bar tip sprocket 20 Bar 21 Bumper spike 22 Chain catcher 23 Chain tensioning screw 24 Clutch cover 25 Right hand guard 26 Throttle control 27 Throttle lockout 28 Chain tensioner wheel 445e 450e 29 Knob 445e 450e 30 O...

Page 6: ...WARNING Never allow children to use or be in the vicinity of the machine As the machine is equipped with a spring loaded stop switch and can be started by low speed and force on the starter handle even small children under some circumstances can produce the force necessary to start the machine This can mean a risk of serious personal injury Therefore remove the spark plug cap when the machine is n...

Page 7: ...chine s safety features and their function are explained For inspection and maintenance see instructions under the heading Checking maintaining and servicing chain saw safety equipment See instructions under the heading What is what to find where these parts are located on your machine The life span of the machine can be reduced and the risk of accidents can increase if machine maintenance is not ...

Page 8: ...ke activated for long periods The chain saw can become very hot To release the chain brake pull the front hand guard backwards towards the front handle Kickback can be very sudden and violent Most kickbacks are minor and do not always activate the chain brake If this happens you should hold the chain saw firmly and not let go The way the chain brake is activated either manually or automatically by...

Page 9: ...ugh to activate the chain brake If the chain brake is too sensitive it would activate all the time which would be a nuisance Will my chain brake always protect me from injury in the event of a kickback 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 ma...

Page 10: ...to choose and maintain your cutting equipment in order to Reduce the risk of kickback Reduce the risk of the saw chain breaking or jumping off the bar Obtain optimal cutting performance Extend the life of cutting equipment Avoid increasing vibration levels WARNING Overexposure to vibration can lead to circulatory damage or nerve damage in people who have impaired circulation Contact your doctor if...

Page 11: ...ent with built in kickback reduction and keeping the chain sharp and well maintained you can reduce the effects of kickback Bar The smaller the tip radius the lower the chance of kickback Chain A chain is made up of a number of links which are available in standard and low kickback versions Some terms that describe the bar and chain To maintain the safety features of the cutting equipment you shou...

Page 12: ...l If the chain is very blunt it will produce wood powder and no chips or shavings A sharp chain eats its way through the wood and produces long thick chips or shavings The cutting part of the chain is called the cutter and consists of a cutting tooth A and the depth gauge B The cutters cutting depth is determined by the difference in height between the two depth gauge setting When you sharpen a cu...

Page 13: ... cutting teeth should be newly sharpened before adjusting the depth gauge setting We recommend that you adjust the depth gauge setting every third time you sharpen the cutting teeth NOTE This recommendation assumes that the length of the cutting teeth is not reduced excessively You will need a flat file and a depth gauge tool We recommend that you use our depth gauge tool to acheive the correct de...

Page 14: ...the bar nuts while lifting the tip of the bar at the same time Check that you can pull the chain round freely by hand and that it does not sag from the underside of the bar The position of the chain tensioning screw on our chain saws varies from model to model See instructions under the heading What is what to find out where it is on your model 445e 450e Release the knob by folding it out Turn the...

Page 15: ...han the oil and that you also use the recommended cutting equipment a bar that is too long will use more chain oil Checking chain lubrication Check the chain lubrication each time you refuel See instructions under the heading Lubricating the bar tip sprocket Aim the tip of the bar at a light coloured surface about 20 cm 8 inches away After 1 minute running at 3 4 throttle you should see a distinct...

Page 16: ...orn down to only 0 16 inch 4 mm the chain must be replaced Bar Check regularly Whether there are burrs on the edges of the bar Remove these with a file if necessary Whether the groove in the bar has become badly worn Replace the bar if necessary Whether the tip of the bar is uneven or badly worn If a hollow forms on the underside of the bar tip this is due to running with a slack chain To prolong ...

Page 17: ... correctly located in the groove in the bar Tighten the bar nuts finger tight Tension the chain by turning the chain tensioning screw clockwise using the combination spanner The chain should be tensioned until it does not sag from the underside of the bar The chain is correctly tensioned when it does not sag from the underside of the bar but can still be turned easily by hand Hold up the bar tip a...

Page 18: ...in fit correctly over the drive sprocket and that the chain is correctly located in the groove in the bar Tension the chain by turning the wheel down The chain should be tensioned until it does not sag from the underside of the bar The chain is correctly tensioned when it does not sag from the underside of the bar but can still be turned easily by hand Hold up the bar tip and tighten the bar knob ...

Page 19: ...ning in Avoid running at a too high speed for extended periods during the first 10 hours 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 engines sometimes referred to as outboard oil rated TCW Never use oil intended for four stroke engines Mixin...

Page 20: ...or that purpose For longer periods of storage or for transport of the chain saw the fuel and chain oil tanks should be emptied Ask where you can dispose of waste fuel and chain oil at your local gas station Ensure the machine is cleaned and that a complete service is carried out before long term storage The bar guard must always be fitted to the cutting attachment when the machine is being transpo...

Page 21: ...valve will automatically return to its original setting Air purge 3 Press the air purge diaphragm repeatedly until fuel fills the diaphragm at least 6 times The diaphragm need not be completely filled Push down the red choke control 5 This inactivates the choke which is not needed when starting a warm chain saw However the movement of the start stop switch will have engaged a high idle making warm...

Page 22: ... very dangerous because you may lose control of the saw Never start the machine indoors Exhaust fumes can be dangerous if inhaled Observe your surroundings and make sure that there is no risk of people or animals coming into contact with the cutting equipment Always hold the saw with both hands The right hand should be on the rear handle and the left hand on the front handle All people whether rig...

Page 23: ...es and avoid cutting bushes i e cutting many small branches at the same time Small branches can be grabbed by the chain and thrown back at you causing serious injury 4 Make sure you can move and stand safely Check the area around you for possible obstacles roots rocks branches ditches etc in case you have to move suddenly Take great care when working on sloping ground 5 Take great care when cuttin...

Page 24: ...saw under control Do not let go of the handles 3 Most kickback accidents happen during limbing Make sure you are standing firmly and that there is nothing in the way that might make you trip or lose your balance Lack of concentration can lead to kickback if the kickback zone of the bar accidentally touches a branch nearby tree or some other object Have control over the workpiece If the pieces you ...

Page 25: ... kickback See instructions under the heading How to avoid kickback Terms Cutting General term for cutting through wood Limbing Cutting branches off a felled tree Splitting When the object you are cutting breaks off before the cut is complete There are five important factors you should consider before making a cut 1 Make sure the cutting equipment will not jam in the cut 2 Make sure the object you ...

Page 26: ...e can you turn the log stop cutting about 2 3 of the way through the log Turn the log and finish the cut from the opposite side The log is supported at one end There is a high risk that it will split Start by cutting from below about 1 3 of the way through Finish by cutting from above so that the two cuts meet The log is supported at both ends There is a high risk that the chain will jam Start by ...

Page 27: ...ent risk See instructions under the heading Freeing a tree that has fallen badly Clearing the trunk and preparing your retreat Delimb the stem up to shoulder height It is safer to work from the top down and to have the tree between you and the saw Remove any undergrowth from the base of the tree and check the area for obstacles stones branches holes etc so that you have a clear path of retreat whe...

Page 28: ...nce between them is at least 1 10 of the trunk diameter The uncut section of the trunk is called the felling hinge The felling hinge controls the direction that the tree falls in All control over the felling direction is lost if the felling hinge is too narrow or non existent or if the directional cuts and felling cut are badly placed When the felling cut and directional cut are complete the tree ...

Page 29: ...reduce the tension and make the tree or branch break at the point of maximum tension Never cut straight through a tree or branch that is in tension If you must cut across tree limb make two to three cuts one inch apart one to two inches deep Continue to cut deeper until tree limb bends and tension is released Cut tree limb from outside the bend after tension has been released How to avoid kickback...

Page 30: ...If possible let the weight of the chain saw rest on the trunk Keep the trunk between you and the chain saw as you move along the trunk Cutting the trunk into logs See instructions under the heading Basic cutting technique WARNING A majority of kickback accidents occur during limbing Do not use the kickback zone of the guide bar Be extremely cautious and avoid contacting the log other limbs or obje...

Page 31: ...ould also be good margin to the rpm when the chain starts to rotate Correctly adjusted carburetor When the carburetor is correctly adjusted the machine accelerates without hesitation and the machine 4 cycles a little at max speed It is also important that the chain does not rotate at idle If the L jet is set too lean it may cause starting difficulties and poor acceleration If the H jet is set too ...

Page 32: ...ngers and thumbs around the handles Apply full throttle and activate the chain brake by tilting your left wrist forward onto the front hand guard Do not let go of the front handle The chain should stop immediately 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 po...

Page 33: ...h automatically returns to run position In order to prevent unintentional starting the spark plug cap must be removed from the spark plug when assembling checking and or performing maintenance Muffler Never use a machine that has a faulty muffler Regularly check that the muffler is securely attached to the machine Some mufflers are equipped with a special spark arrestor screen If your machine has ...

Page 34: ...arter pulley Wind approx 3 turns of the starter cord on the starter pulley Fit the starter pulley so that the end of the recoil spring D hooks into the starter pulley Now assemble the drive disc spring drive disc and the bolt in the centre of the pulley Carry the starter cord through the hole in the starter housing and the starter handle Tie a good knot on the starter cord Tensioning the recoil sp...

Page 35: ...nst 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 Air filter The air filter 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 Remove the air filter after taking o...

Page 36: ...ed with a suppressor Lubricating the bar tip sprocket Lubricate the bar tip sprocket each time you refuel Use the special grease gun and a good quality bearing grease Needle bearing lubrication The clutch drum has a needle bearing on the output shaft This needle bearing must be lubricated regularly When lubricating remove the clutch cover by loosening the two bar nuts Lay the saw on its side with ...

Page 37: ... filter and carburetor Special measures are therefore often required Partly mask the air inlet on the starter to increase the working temperature of the engine Temperature 5 C 23 F or colder For running the machine in cold weather or powder snow a special cover is available which is mounted on the starter housing This reduces the intake of cold air and prevents large amounts of snow from being suc...

Page 38: ...rly for more even wear Check the lubrication hole in the bar to be sure it is not clogged Clean the bar groove If the bar has a sprocket tip this should be lubricated Lubricate the clutch drum bearing Clean the outside of the carburetor Check that the bar and chain are getting sufficient oil File off any burrs from the edges of the bar Check fuel hose for cracks or other damage Change if necessary...

Page 39: ...buretor Zama Zama Zama Zama Carburetor type EL 37 EL 37 EL 37 EL 37 Fuel tank capacity US pint litre 0 99 0 47 0 99 0 47 0 99 0 47 0 99 0 47 Oil pump capacity at 9 000 rpm ml min 13 13 13 13 Oil tank capacity US pint litre 0 55 0 26 0 55 0 26 0 55 0 26 0 55 0 26 Type of oil pump Not adjustable Not adjustable Not adjustable Not adjustable Weight Chain saw without bar or chain empty tanks lb kg 10 8...

Page 40: ...sprocket nose bar may be considered to have equivalent or less kickback energy than the sprocket nose bar Bar and chain combinations Chain saw models Husqvarna 445 445e and 450e met the kickback performance requirements of ANSI B175 1 2000 when tested with the combinations of bars and saw chains listed below The saw chain Husqvarna H30 is also classified as a low kickback saw chain since it met th...

Page 41: ... to the initial owner and each subsequent purchaser that the engine is free from defects in materials and workmanship which cause the failure of a warranted part for a period of two years WHAT IS COVERED REPAIR OR REPLACEMENT OF PARTS Repair or replacement of any warranted part will be performed at no charge to the owner at an approved Husqvarna Forest Garden servicing dealer If you have any quest...

Page 42: ...usted or not completely and securely assembled Be sure that the saw chain stops moving when the throttle control trigger is released Shut off the engine before setting the chain saw down Use extreme caution when cutting small size brush and saplings because slender material may catch the saw chain and be whipped toward you or pull you off balance When cutting a limb that is under tension be alert ...

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