Husqvarna Chainsaw 115 13 81 95 User Manual

Operator’s manual (EPA III)  
445 445e 450e  
Please read the operator’s manual carefully and make sure you understand the instructions  
before using the machine.  
English  
115 13 81-95 Rev.3 2008-12-15  
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KEY TO SYMBOLS  
Symbols on the machine:  
WARNING! Chain saws can be  
dangerous! Careless or improper use  
can result in serious or fatal injury to the  
operator or others.  
Regular cleaning is required.  
Please read the operator’s manual  
carefully and make sure you  
understand the instructions before  
using the machine.  
Visual check.  
Always wear:  
Approved protective helmet  
Approved hearing protection  
Protective goggles or a visor  
Protective goggles or a visor must be  
worn.  
Both of the operators hands must be  
used to operate the chain saw.  
Refuelling.  
Never operate a chain saw holding it with  
one hand only.  
Filling with oil and adjusting oil flow.  
Contact of the guide bar tip with any  
object must be avoided.  
The chain brake must be engaged  
when the chain saw is started.  
WARNING! Kickback may occur when  
the nose or tip of the guide bar touches an  
object, and cause a lightning fast reverse  
reaction, kicking the guide bar up and  
towards the operator. May cause serious  
personal injury.  
You will find the following labels on your chain saw:  
Other symbols/decals on the machine refer to special  
certification requirements for certain markets.  
EPA III  
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.  
The Emissions Compliance Period referred to on the  
Emission Compliance label indicates the number of  
operating hours for which the engine has been shown to  
meet Federal emissions requirements.  
Maintenance, replacement, or repair of the emission  
control devices and system may be performed by any  
nonroad engine repair establishment or individual.  
Always wear approved protective  
gloves.  
The engine exhaust from this product  
contains chemical known to the State  
of California to cause cancer, birth  
defects or other reproductive harm.  
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CONTENTS  
FEDERAL EMISSION CONTROL WARRANTY  
STATEMENT  
Contents  
KEY TO SYMBOLS  
YOUR WARRANTY RIGHTS AND OBLIGATIONS 41  
Symbols on the machine: .....................................  
Symbols in the operator’s manual: .......................  
CONTENTS  
2
2
AMERICAN STANDARD SAFETY  
PRECAUTIONS  
Safety precautions for chain saw users ................ 42  
Contents ...............................................................  
INTRODUCTION  
3
4
5
Dear customer! .....................................................  
WHAT IS WHAT?  
What is what on the chain saw? ...........................  
GENERAL SAFETY PRECAUTIONS  
Before using a new chain saw ..............................  
Important ..............................................................  
Always use common sense ..................................  
Personal protective equipment .............................  
Machines safety equipment .................................  
6
6
7
7
7
Cutting equipment ................................................ 10  
ASSEMBLY  
Fitting the bar and chain ....................................... 17  
FUEL HANDLING  
Fuel ...................................................................... 19  
Fueling .................................................................. 20  
Fuel safety ............................................................ 20  
STARTING AND STOPPING  
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 cleaning ........................ 37  
Winter use ............................................................ 37  
Maintenance schedule ......................................... 38  
TECHNICAL DATA  
Technical data ...................................................... 39  
Bar and chain combinations ................................. 40  
Saw chain filing and file gauges ........................... 40  
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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 Huskvarna 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 over 300 years of continuous operation, the Husqvarna factory has produced a lot of different  
products, from wood stoves to modern kitchen appliances, sewing machines, bicycles, motorcycles etc. In 1956, the first  
motor driven lawn mowers appeared, followed by chain saws in 1959, and it is within this area Husqvarna is working  
today.  
Today Husqvarna is one of the leading manufacturers in the world of forest and garden products, with quality as our  
highest priority. We develop, 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 will be satisfied with your product and that it will be your companion for a long time. Think of this  
operators manual as a valuable document. By following itscontent (using, service, maintenance etc) the life span and  
the second-hand value of the machine can be extended.If you ever lend or sell this machine, make sure that the borrower  
or buyer gets the operators manual, so they will also know how to properly maintain and use it.  
Thank you for using a Husqvarna product.  
Husqvarna AB has a policy of continuous product development and therefore reserves the right to modify the design and  
appearance of products without prior notice.  
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WHAT IS WHAT?  
What is what on the chain saw?  
1
2
3
4
5
6
7
8
9
Cylinder cover  
17 Muffler  
18 Chain  
Decompression valve  
Air purge  
19 Bar tip sprocket  
Start reminder  
20 Bar  
Combined start and stop switch  
Rear handle  
21 Bumper spike  
22 Chain catcher  
Information and warning decal  
Fuel tank  
23 Chain tensioning screw  
24 Clutch cover  
Adjuster screws carburetor  
25 Right hand guard  
26 Throttle control  
10 Starter handle  
11 Starter  
27 Throttle lockout  
12 Chain oil tank  
28 Chain tensioner wheel (445e, 450e)  
29 Knob (445e, 450e)  
30 Operator’s manual (EPA)  
31 Bar guard  
13 Product and serial number plate  
14 Felling direction mark  
15 Front handle  
16 Front hand guard  
32 Combination spanner  
English – 5  
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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  
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 not under close  
supervision.  
Please read this manual carefully.  
!
Check that the cutting equipment is correctly fitted and  
adjusted. See instructions under the heading  
Assembly.  
Refuel and start the chain saw. See the instructions  
under the headings Fuel Handling and Starting and  
Stopping.  
Do not use the chain saw until sufficient chain oil has  
reached the chain.See instructions under the heading  
Cutting equipment.  
Long-term exposure to noise can result in permanent  
hearing impairment. So always use approved hearing  
protection.  
Important  
IMPORTANT!  
The machine is only designed for cutting wood.  
WARNING! Under no circumstances may  
the design of the machine be modified  
You should only use the saw with the bar and chain  
combinations we recommend in the chapter Technical  
data.  
!
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.Your  
warranty may not cover damage or  
liability caused by the use of non-  
authorized accessories or replacement  
parts.  
Never use the machine if you are fatigued, while under  
the influence of alcohol or drugs, medication or anything  
that could affect your vision, alertness, coordination or  
judgement.  
Wear personal protective equipment. See instructions  
under the heading Personal protective equipment.  
Do not modify this product or use it if it appears to have  
been modified by others.  
WARNING! A chain saw is a dangerous  
tool if used carelessly or incorrectly and  
can cause serious, even fatal injuries. It  
is very important that you read and  
understand the contents of this  
operator’s manual.  
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 use any accessories other than those  
recommended in this manual. See instructions under  
the headings Cutting equipment and Technical data.  
WARNING! The inside of the muffler  
contain chemicals that may be  
carcinogenic. Avoid contact with these  
elements in the event of a damaged  
muffler.  
!
CAUTION! Always wear protective glasses or a face  
visor to reduce the risk of injury from thrown objects. A  
chain saw is capable of throwing objects, such as wood  
chips, small pieces of wood, etc, at great force.This can  
result in serious injury, especially to the eyes.  
WARNING! Long term inhalation of the  
engine’s exhaust fumes, chain oil mist  
and dust from sawdust can represent a  
health risk.  
!
WARNING! Running an engine in a  
confined or badly ventilated area can  
result in death due to asphyxiation or  
carbon monoxide poisoning.  
!
WARNING! The ignition system of this  
machine produces an electromagnetic  
!
WARNING! Faulty cutting equipment or  
the wrong combination of bar and saw  
chain increases the risk of kickback!  
Only use the bar/saw chain combinations  
we recommend, and follow the filing  
instructions. See instructions under the  
heading Technical data.  
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.  
!
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GENERAL SAFETY PRECAUTIONS  
Gloves with saw protection  
Always use common sense  
Trousers with saw protection  
It is not possible to cover every conceivable situation you  
can face when using a chain saw. Always exercise care and  
use your common sense. Avoid all situations which you  
consider to be beyond your capability. If you still feel  
uncertain about operating procedures after reading these  
instructions, you should consult an expert before continuing.  
Do not hesitate to contact your dealer or us if you have any  
questions about the use of the chain saw.We will willingly be  
of service and provide you with advice as well as help you to  
use your chain saw both efficiently and safely. Attend a  
training course in chain saw usage if possible.Your dealer,  
forestry school or your library can provide information about  
which training materials and courses are available.  
Boots with saw protection, steel toe-cap and non-slip  
sole  
Always have a first aid kit nearby.  
Fire Extinguisher and Shovel  
Generally clothes should be close-fitting without  
restricting your freedom of movement.  
IMPORTANT! Sparks can come from the muffler, the bar  
and chain or other sources. Always have fire  
extinguishing tools available if you should need them.  
Help prevent forest fires.  
Machine s safety equipment  
In this section the machine’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  
carried out correctly and if service and/or repairs are not  
carried out professionally. If you need further information  
please contact your nearest servicing dealer.  
Work is constantly in progress to improve the design and  
technology - improvements that increase your safety and  
efficiency. Visit your dealer regularly to see whether you  
can benefit from new features that have been introduced.  
WARNING! Never use a machine with  
defective safety components. Safety  
!
equipment must be inspected and  
maintained. See instructions under the  
heading Checking, maintaining and  
servicing chain saw safety equipment. If  
your machine does not pass all the  
checks, take the saw to a servicing  
dealer for repair.  
Personal protective equipment  
WARNING! Most chain saw accidents  
happen when the chain touches the  
!
operator.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.  
Chain brake and front hand guard  
Your chain saw is equipped with a chain brake that is  
designed to stop the chain if you get a kickback.The chain  
brake reduces the risk of accidents, but only you can  
prevent them.  
Take care when using your saw and make sure the  
kickback zone of the bar never touches any object.  
Approved protective helmet  
Hearing protection  
Protective goggles or a visor  
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GENERAL SAFETY PRECAUTIONS  
The chain brake (A) can either be activated manually  
(by your left hand) or automatically by the inertia  
release mechanism.  
To release the chain brake pull the front hand guard  
backwards, towards the front handle.  
The brake is applied when the front hand guard (B) is  
pushed forwards.  
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.  
This movement activates a spring-loaded mechanism  
that tightens the brake band (C) around the engine  
drive system (D) (clutch drum).  
The way the chain brake is activated, either manually  
or automatically by the inertia release mechanism,  
depends on the force of the kickback and the position  
of the chain saw in relation to the object that the  
kickback zone of the bar strikes.  
The front hand guard is not designed solely to activate  
the chain brake. Another important feature is that it  
reduces the risk of your left hand hitting the chain if  
you lose grip of the front handle.  
If you get a violent kickback while the kickback zone of  
the bar is farthest away from you the chain brake is  
designed to be activated by the inertia in the kickback  
direction.  
The chain brake must be engaged when the chain  
saw is started to prevent the saw chain from rotating.  
Use the chain brake as a ”parking brakewhen starting  
and when moving over short distances, to reduce the  
risk of moving chain accidentally hitting your leg or  
anyone or anything close by. Do not leave the chain  
saw switched on with the chain brake activated for long  
periods. The chain saw can become very hot.  
If the kickback is less violent or the kickback zone of  
the bar is closer to you the chain brake is designed to  
be activated manually by the movement of your left  
hand.  
In the felling position the left hand is in a position that  
makes manual activation of the chain brake  
impossible. With this type of grip, that is when the left  
hand is placed so that it cannot affect the movement  
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GENERAL SAFETY PRECAUTIONS  
of the front hand guard, the chain brake can only be  
activated by the inertia action.  
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 arrangement means that the  
throttle control is automatically locked at the idle setting.  
Will my hand always activate the chain  
brake during a kickback?  
No. It takes a certain force to move the hand guard  
forward. If your hand only lightly touches the front guard  
or slips over it, the force may not be enough to trigger the  
chain brake.You should also maintain a firm grip of the  
chain saw handles while working. If you do and  
experience a kickback, your hand may never leave the  
front handle and will not activate the chain brake, or the  
chain brake will only activate after the saw has swung  
around a considerable distance. In such instances, the  
chain brake might not have enough time to stop the saw  
chain before it touches you.  
Chain catcher  
The chain catcher is designed to catch the chain if it snaps  
or jumps off. This should not happen if the chain is  
properly tensioned (see instructions under the heading  
Assembly) and if the bar and chain are properly serviced  
and maintained (see instructions under the heading  
General working instructions).  
There are also certain positions in which your hand  
cannot reach the front hand guard to activate the chain  
brake; for example, when the saw chain is held in felling  
position.  
Will my inertia activated chain brake  
always activate during kickback in the  
event of a kickback?  
No. First your brake must be in working order.Testing the  
brake is simple, see instructions under the heading  
Checking, maintaining and servicing chain saw safety  
equipment.We recommend you do before you begin each  
work session. Second the kickback must be strong  
enough to activate the chain brake. If the chain brake is  
too sensitive it would activate all the time which would be  
a nuisance.  
Right hand guard  
Apart from protecting your hand if the chain jumps or  
snaps, the right hand guard stops branches and twigs  
from interfering with your grip on the rear handle.  
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 may be activated but  
if the bar is too close to you the brake might not have  
enough time to slow down and stop the chain before the  
chain saw hits you.  
Only you and proper working technique can eliminate  
kickback and its danger.  
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GENERAL SAFETY PRECAUTIONS  
Vibration damping system  
Muffler  
Your machine is equipped with a vibration damping  
system that is designed to reduce vibration and make  
operation easier.  
The muffler is designed to keep noise levels to a minimum  
and to direct exhaust fumes away from the user.  
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!  
The machines vibration damping system reduces the  
transfer of vibration between the engine unit/cutting  
equipment and the machines handle unit.The body of the  
chain saw, including the cutting equipment, is insulated  
from the handles by vibration damping units.  
In areas with a hot, dry climate there is a high risk of fires.  
These areas are sometimes subject to government rules  
requiring among other things the muffler must be  
equipped with an approved type of spark arrestor screen.  
Cutting hardwoods (most broadleaf trees) creates more  
vibration than cutting softwoods (most conifers). Cutting  
with cutting equipment that is blunt or faulty (wrong type  
or badly sharpened) will increase the vibration level.  
CAUTION! The muffler gets very hot during and after  
use.This also applies during idling. Be aware of the fire  
hazard, especially when working near flammable  
substances and/or vapours.  
WARNING! Overexposure to vibration  
can lead to circulatory damage or nerve  
WARNING! Never use a saw without a  
muffler, or with a damaged muffler. A  
!
!
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.These  
damaged muffler may substantially  
increase the noise level and the fire  
hazard. Keep fire fighting equipment  
handy. If a spark arrestor screen is  
required in your area, never use the saw  
without or with a broken spark arrestor  
screen.  
Cutting equipment  
This section describes how to choose and maintain your  
cutting equipment in order to:  
symptoms may be increased in cold  
temperatures.  
Stop switch  
Reduce the risk of kickback.  
Use the stop switch to switch off the engine.  
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.  
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GENERAL SAFETY PRECAUTIONS  
General rules  
Cutting equipment designed to reduce  
kickback  
Only use cutting equipment recommended by us!  
See instructions under the heading Technical data.  
WARNING! Faulty cutting equipment or  
the wrong combination of bar and saw  
chain increases the risk of kickback!  
Only use the bar/saw chain combinations  
we recommend, and follow the filing  
instructions. See instructions under the  
heading Technical data.  
!
Keep the chain’s cutting teeth properly  
sharpened! Follow our instructions and use the  
recommended file gauge. A damaged or badly  
sharpened chain increases the risk of accidents.  
The only way to avoid kickback is to make sure that the  
kickback zone of the bar never touches anything.  
By using cutting equipment with ”built-in” kickback  
reduction and keeping the chain sharp and well-  
maintained you can reduce the effects of kickback.  
Bar  
Maintain the correct depth gauge setting! Follow  
our instructions and use the recommended depth  
gauge clearance. Too large a clearance increases  
the risk of kickback.  
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.  
IMPORTANT! No saw chain design eliminates the  
danger of kickback.  
Keep the chain properly tensioned! If the chain is  
slack it is more likely to jump off and lead to increased  
wear on the bar, chain and drive sprocket.  
WARNING! Any contact with a rotating  
saw chain can cause extremely serious  
injuries.  
!
Some terms that describe the bar and chain  
To maintain the safety features of the cutting equipment,  
you should replace a worn or damaged bar or chain with  
a bar and chain combinations recommended by  
Husqvarna. See instructions under the heading Technical  
Data for a list of replacement bar and chain combinations  
we recommend.  
Keep cutting equipment well lubricated and  
properly maintained! A poorly lubricated chain is  
more likely to break and lead to increased wear on the  
bar, chain and drive sprocket.  
Bar  
Length (inches/cm)  
Number of teeth on bar tip sprocket (T).  
Chain pitch (inches). The spacing between the drive  
links of the chain must match the spacing of the teeth  
on the bar tip sprocket and drive sprocket.  
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GENERAL SAFETY PRECAUTIONS  
Number of drive links. The number of drive links is  
determined by the length of the bar, the chain pitch  
and the number of teeth on the bar tip sprocket.  
A sharp chain eats its way through the wood and  
produces long, thick chips or shavings.  
Bar groove width (inches/mm). The groove in the bar  
must match the width of the chain drive links.  
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 cutting tooth there are four important  
factors to remember.  
Chain oil hole and hole for chain tensioner. The bar  
must be matched to the chain saw design.  
1
Filing angle  
Chain  
2
Cutting angle  
Chain pitch (inches)  
3
4
File position  
Drive link width (mm/inches)  
Round file diameter  
Number of drive links.  
It is very difficult to sharpen a chain correctly without the  
right equipment. We recommend that you use our file  
gauge. This will help you obtain the maximum kickback  
reduction and cutting performance from your chain.  
Sharpening your chain and adjusting  
depth gauge setting  
General information on sharpening cutting teeth  
Never use a blunt chain. When the chain is blunt you  
have to exert more pressure to force the bar through  
the wood and the chips will be very small. If the chain  
is very blunt it will produce wood powder and no chips  
or shavings.  
See instructions under the heading Technical data for  
information about sharpening your chain.  
WARNING! Departure from the  
sharpening instructions considerably  
increases the risk of kickback.  
!
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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  
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.  
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.  
Check that the chain is correctly tensioned. A slack  
chain will move sideways, making it more difficult to  
sharpen correctly.  
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.  
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.  
Tensioning the chain  
WARNING! A slack chain may jump off  
the bar and cause serious or even fatal  
injury.  
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.  
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!  
!
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English 13  
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 chain until it does  
not sag from the underside of the bar.  
Use the combination spanner to tighten 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.  
Tighten the bar clutch by turning the knob clockwise.  
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  
Fold the knob back in to lock the tensioning.  
Release the knob by folding it out.  
14 – English  
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GENERAL SAFETY PRECAUTIONS  
Checking chain lubrication  
Lubricating cutting equipment  
Check the chain lubrication each time you refuel. See  
instructions under the heading Lubricating the bar tip  
sprocket.  
WARNING! Poor lubrication of cutting  
equipment may cause the chain to snap,  
which could lead to serious, even fatal  
injuries.  
!
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 line of oil on the light  
surface.  
Chain oil  
Chain oil must demonstrate good adhesion to the chain  
and also maintain its flow characteristics regardless of  
whether it is warm summer or cold winter weather.  
As a chain saw manufacturer we have developed an  
optimal chain oil which has a vegetable oil base. We  
recommend the use of our own oil for both maximum  
chain life and to minimise environmental damage. If our  
own chain oil is not available, standard chain oil is  
recommended.  
Never use waste oil! Using waste oil can be dangerous  
to you and damage the machine and environment.  
If the chain lubrication is not working:  
IMPORTANT! When using vegetable based saw chain  
oil, dismantle and clean the groove in the bar and saw  
chain before long-term storage.Otherwise there is a risk  
of the saw chain oil oxidizing, which will result in the saw  
chain becoming stiff and the bar tip sprocket jamming.  
Check that the oil channel in the bar is not obstructed.  
Clean if necessary.  
Filling with chain oil  
All our chain saws have an automatic chain lubrication  
system. On some models the oil flow is also  
adjustable.  
Check that the groove in the edge of the bar is clean.  
Clean if necessary.  
The saw chain oil tank and the fuel tank are designed  
so that the fuel runs out before the saw chain oil.  
However, this safety feature requires that you use the  
right sort of chain oil (if the oil is too thin it will run out  
before the fuel), and that you adjust the carburetor as  
recommended (a lean mixture may mean that the fuel  
lasts longer than the oil) and that you also use the  
recommended cutting equipment (a bar that is too  
long will use more chain oil).  
Check that the bar tip sprocket turns freely and that  
the lubricating hole in the tip sprocket is not blocked.  
Clean and lubricate if necessary.  
If the chain lubrication system is still not working after  
carrying out the above checks and associated measures  
you should contact your servicing dealer.  
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English 15  
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. Replace the drive sprocket  
whenever you replace the chain.  
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.  
Needle bearing lubrication  
Both versions of sprockets have a needle bearing on the  
drive shaft, which has to be greased regularly (once a  
week).CAUTION! Use only high quality bearing grease or  
engine oil.  
To prolong the life of the bar you should turn it over  
regularly.  
See instructions under the heading Maintenance, Needle  
bearing lubrication.  
Checking wear on cutting equipment  
WARNING! Most chain saw accidents  
happen when the chain touches the  
operator.  
Check the chain daily for:  
!
Wear personal protective equipment. See  
instructions under the heading Personal  
protective equipment.  
Do not tackle any job that you feel you  
are not adequately trained for. See  
instructions under the headings  
Personal protective equipment, How to  
avoid kickback, Cutting equipment and  
General working instructions.  
Visible cracks in rivets and links.  
Whether the chain is stiff.  
Whether rivets and links are badly worn.  
Avoid situations where there is a risk of  
kickback. See instructions under the  
Replace the saw chain if it exhibits any of the points  
above.  
heading Machine s safety equipment.  
We recommend you compare the existing chain with a  
new chain to decide how badly the existing chain is worn.  
Use the recommended protective  
equipment and check its condition. See  
instructions under the heading General  
working instructions.  
When the length of the cutting teeth has worn down to  
only 0.16 inch (4 mm) the chain must be replaced.  
Check that all the chain saw safety features  
are working. See instructions under the  
headings General working instructions and  
General safety precautions.  
16 – English  
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