Please r ead the operator’s manual carefully and make sure you understand the instructions
before using the machine.
1153136-95 Rev .2 2010-04-08
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1153136-95 Rev .2 2010-04-08
7
W
EP
KEY T O SYMBOLS
Symbols on the mac hine and/or in
the manual:
ARNING! Chain saws can be
dangerous! Careless or improper use
can result in 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:
• Approved protective helmet
• Approved hearing protection
• Protective goggles or a visor
Both of the operator ′ s hands must be
used to operate the chain saw.
Never operate a chain saw holding it with
one hand only.
Contact of the guide bar tip with any
object must be avoided.
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.
Chain brake, activated (right)
Chain brake, not activated (left)
Switch off the engine bef ore carrying
out any checks or maintenance. NB!
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 check.
Protective goggles or a visor must be
worn.
Refuelling.
Filling with oil and adjusting oil flow.
The chain brake must be engaged when
the chain saw is started.
You will find the following labels on your chain saw:
Decompression v alve: The valve
is to reduce the pressure in the cylinder
and make starting easier. You should
always use the decompression valve
when starting the machine.
Ignition; choke: Set the choke control
in the choke position. This should
automatically set the stop switch to the
start position.
Air purge
Adjustment of the oil pump
Other symbols/decals on the mac hine refer to special
certification requirements for certain markets.
1153136-95 Rev .2 2010-04-08
A III
The Emissions Compliance P eriod 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.
English
–
8
CONTENTS
ST
W
T
Y
Contents
KEY TO SYMBOLS
Symbols on the machine and/or in the man ual: .... 7
Saf ety precautions for chain saw users ................ 34
25
– English
1153136-95 Rev .2 2010-04-08
INTR ODUCTION
Dear customer!
Cong ratulations 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 operator
following its
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 operator
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.
For customer assistance, contact us at our website:
www.usa.husqvarna.com
s manual as a valuable document. By
content (using, service, maintenance etc) the
s
9
′
′
′
1
What is what on the c hain saw?
Cylinder cover
2 Decompression valve
3 Air purge
4 Start reminder
5 Combined start and stop switch
6 Rear handle
7 Information and warning decal
8 Fuel tank
9 Adjuster screws 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 Operator’s manual (EPA)
31 Bar guard
32 Combination spanner
1153136-95 Rev .2 2010-04-08
English
–
GENERAL SAFETY PRECA UTIONS
!
!
!
10
•
W
W
W
W
Bef ore using a new chain saw
Please read this manual carefully.
• (1) - (113) refer to figures on p. 2-6.
• 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.
ARNING! 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. Your
warranty may not cover damage or
liability caused by the use of nonauthorized accessories or replacement
parts.
ARNING! 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.
ARNING! The inside of the muffler
contain chemicals that may be
!
carcinogenic. Avoid contact with these
elements in the event of a damaged
muffler.
ARNING! Long term inhalation of the
engine’s exhaust fumes, chain oil mist
!
and dust from sawdust can represent a
health risk.
WARNING! This machine produces an
electromagnetic field during operation.
!
This field may under some
circumstances interfere with active or
passive medical implants. To reduce the
risk of serious or fatal injury, we
recommend persons with medical
implants to consult their physician and
the medical implant manufacturer before
operating this machine.
WARNING! Never allow children to use or
be in the vicinity of the machine. As the
machine is equipped with a springloaded 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.
Impor tant
IMPORTANT!
This chain saw for forest service is designed for forest
work such as felling, delimbing and cutting.
You should only use the saw with the bar and chain
combinations we recommend in the chapter Technical
data.
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.
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.
NB! 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! Running an engine in a
confined or badly ventilated area can
result in death due to asphyxiation or
carbon monoxide poisoning.
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.
– English
1153136-95 Rev .2 2010-04-08
GENERAL SAFETY PRECAUTIONS
!
Always use common sense (2)
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. 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.
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.
• Approved protective helmet
• Hearing protection
• Protective goggles or a visor
• Gloves with saw protection
• Trousers with saw protection
• 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.
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.
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. (3)
Take care when using your saw and make sure the
kickback zone of the bar never touches any object.
• The chain brake (A) can either be activated manually
(by your left hand) or automatically by the inertia
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).
• 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.
• The chain brake must be engaged when the chain
saw is started to prevent the saw chain from rotating.
(52)
• Use the chain brake as a ”parking brake” when
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.
• The chain brake is released by moving the front hand
guard marked ”PULL BACK TO RESET” back,
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 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.
(5)
(5)
(6)
(56)
(4)
1153136-95 Rev.2 2010-04-08
English –11
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