Operator′s manual
T435
Please read the operator’s manual carefully and make sure you understand the instructions
before using the machine.
English
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KEY TO SYMBOLS
Symbols on the machine:
WARNING! Chain saws can be
dangerous! Careless or incorrect use can
result in serious or fatal injury to the
operator or others.
Working position
Please read the operator’s manual
carefully and make sure you understand
the instructions before using the
machine.
Choke
Always wear:
Other symbols/decals on the machine refer to special
certification requirements for certain markets.
•
•
•
Approved protective helmet
Approved hearing protection
Protective goggles or a visor
Symbols in the operator’s
manual:
Switch off the engine before carrying
out any checks or maintenance.
This product is in accordance with
applicable EC directives.
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.
Always wear approved protective
gloves.
Both of the operator′s hands must be
used to operate the chain saw.
Regular cleaning is required.
Visual check.
Never operate a chain saw holding it with
one hand only.
Protective goggles or a visor must be
worn.
Never let the guide bar tip come in
contact with any object.
Refuelling.
Use appropriate protections for foot-leg
and hand-arm.
Filling with oil and adjusting oil flow.
Never let the guide bar tip come in
contact with any object.
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.
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.
This saw should only be used by
persons who are specially trained
in tree maintenance work. See
operator’s manual!
2 – English
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CONTENTS
Contents
KEY TO SYMBOLS
Symbols on the machine: .....................................
Symbols in the operator’s manual: .......................
CONTENTS
Contents ...............................................................
INTRODUCTION
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 .............................
Machine′s safety equipment .................................
Cutting equipment ................................................ 10
ASSEMBLY
Fitting the bar and chain ....................................... 16
FUEL HANDLING
Fuel ...................................................................... 17
Fuelling ................................................................. 18
Fuel safety ............................................................ 18
STARTING AND STOPPING
Starting and stopping ........................................... 19
WORKING TECHNIQUES
Before use: ........................................................... 21
General working instructions ................................ 21
How to avoid kickback .......................................... 28
MAINTENANCE
General ................................................................. 29
Carburettor adjustment ......................................... 29
Checking, maintaining and servicing chain saw
safety equipment .................................................. 30
Muffler .................................................................. 31
Starter .................................................................. 32
Air filter ................................................................. 34
Spark plug ............................................................ 34
Lubricating the bar tip sprocket ............................ 34
Adjustment of the oil pump ................................... 35
Cooling system ..................................................... 35
Maintenance schedule ......................................... 36
Technical data ...................................................... 37
Bar and chain combinations ................................. 38
Saw chain filing and file gauges ........................... 38
EC-declaration of conformity ................................ 38
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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 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. The business concept is to develop, manufacture and market motor driven products for forestry and
gardening as well as for building and construction industry. Husqvarna′s aim is also to be in the front edge according to
ergonomics, usability, security and environmental protection. That is the reason why we have developed many different
features to provide our products within these areas.
We are convinced that you will appreciate with great satisfaction the quality and performance of our product for a very
long time to come. The purchase of one of our products 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 authorised dealers, ask for the
address of your nearest service workshop.
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′s manual as a valuable document. By following its′ content (using, service, maintenance etc) the life span and
the second-hand value of the machine can be extended. If you will sell this machine, make sure that the buyer will get
the operator′s manual.
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
Front hand guard
Information and warning decal
Top handle
16 Throttle control
17 Stop switch
18 Bar
Adjuster screws carburettor
Filter cover
19 Chain
20 Bar tip sprocket
21 Fixing eye for safety line
22 Clutch cover
Fuel tank
Spark plug cap
Starter
23 Product and serial number plate
24 Chain tensioning screw
25 Chain catcher
26 Spike bumper
27 Operator′s manual
28 Bar guard
Starter handle
10 Front handle
11 Chain oil tank
12 Oil pump adjustment screw
13 Air purge
14 Choke control
15 Throttle lockout
29 Combination spanner
30 Screwdriver
English – 5
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GENERAL SAFETY PRECAUTIONS
Before using a new chain saw
Important
•
Please read this manual carefully.
IMPORTANT!
•
Check that the cutting equipment is correctly fitted and
adjusted. See instructions under the heading
Assembly.
The machine is only designed for cutting wood.
You should only use the saw with the bar and chain
combinations we recommend in the chapter Technical
data.
•
•
•
Refuel and start the chain saw. See the instructions
under the headings Fuel Handling and Starting and
Stopping.
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.
Do not use the chain saw until sufficient chain oil has
reached the chain.See instructions under the heading
Lubricating cutting equipment.
Wear personal protective equipment. See instructions
under the heading ”Personal protective equipment”.
Long-term exposure to noise can result in permanent
hearing impairment. So always use approved hearing
protection.
Do not modify this product or use it if it appears to have
been modified by others.
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.
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.
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! 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.
!
WARNING! Running an engine in a
confined or badly ventilated area can
result in death due to asphyxiation or
carbon monoxide poisoning.
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! 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.
WARNING! Long term inhalation of the
engine’s exhaust fumes, chain oil mist
and dust from sawdust can represent a
health risk.
!
WARNING! The ignition system of this
machine produces an electromagnetic
Always use common sense
!
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.
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
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GENERAL SAFETY PRECAUTIONS
provide information about which training materials and
courses are available.
•
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.
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.
This top handle chainsaw is designed specifically for tree
surgery and maintenance in the tree. Due to the special
compact handle design (closely spaced handles), there is
an increased risk of losing control. For this reason these
special chainsaws should be used only for work in a tree
by persons who are trained in special cutting and working
techniques and who are properly secured (lift bucket,
ropes, safety harness). Regular chainsaws (with wider
spaced handles) are recommended for all other cutting
work at ground level.
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.
WARNING! Working in a tree requires the
use of special cutting and working
!
techniques which must be observed in
order to reduce the increased risk of
personal injury. Never work in a tree
unless you have received specific,
professional training for such work,
including training in the use of safety
and other climbing equipment, such as
harnesses, ropes, belts, climbing irons,
snap hooks, carabiners, etc.
CAUTION! Never use a chain saw by holding it with one
hand.A chain saw is not safely controlled with one hand;
you can cut yourself. Always have a secure, firm grip
around the handles with both hands.
′
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 service workshop.
•
•
•
•
•
•
•
Approved protective helmet
Hearing protection
Protective goggles or a visor
Gloves with saw protection
Trousers with saw protection
Use appropriate protections for arm.
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.
Boots with saw protection, steel toe-cap and non-slip
sole
•
Always have a first aid kit nearby.
English – 7
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GENERAL SAFETY PRECAUTIONS
•
The chain brake must be engaged when the chain
saw is started to prevent the saw chain from rotating.
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.
•
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.
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.
•
•
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.
B
B
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.
A
•
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.
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GENERAL SAFETY PRECAUTIONS
If the kickback is less violent or the kickback zone of
the bar is closer to you the chain brake will be
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.
activated manually by the movement of your left hand.
A
•
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
of the front hand guard, the chain brake can only be
activated by the inertia action.
B
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).
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.
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.
Vibration damping system
Your machine is equipped with a vibration damping
system that is designed to minimize vibration and make
operation easier.
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. 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.
The machine′s vibration damping system reduces the
transfer of vibration between the engine unit/cutting
equipment and the machine′s handle unit.The body of the
chain saw, including the cutting equipment, is insulated
from the handles by vibration damping units.
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.
Cutting hardwoods (most broadleaf trees) creates more
vibration than cutting softwoods (most conifers). Cutting
Only you and proper working technique can eliminate
kickback and its danger.
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GENERAL SAFETY PRECAUTIONS
with cutting equipment that is blunt or faulty (wrong type
or badly sharpened) will increase the vibration level.
Cutting equipment
This section describes how 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 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
General rules
•
Only use cutting equipment recommended by us!
See instructions under the heading Technical data.
symptoms may be increased in cold
temperatures.
•
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.
Stop switch
Use the stop switch to switch off the engine.
•
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.
Muffler
The muffler is designed to keep noise levels to a minimum
and to direct exhaust fumes away from the user.
In areas with a hot, dry climate there is a high risk of fires.
•
•
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! 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!
!
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.
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.
WARNING! Never use a saw without a
muffler, or with a damaged muffler. A
!
damaged muffler may substantially
increase the noise level and the fire
hazard. Keep fire fighting equipment
handy.
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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.
Cutting equipment designed to reduce
kickback
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.
•
Bar groove width (inches/mm). The groove in the bar
must match the width of the chain drive links.
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.
•
Chain oil hole and hole for chain tensioner. The bar
must be matched to the chain saw design.
Bar
The smaller the tip radius the lower the chance of
kickback.
Chain
Chain
A chain is made up of a number of links, which are
available in standard and low-kickback versions.
•
Chain pitch (inches)
IMPORTANT! No saw chain design eliminates the
danger of kickback.
•
Drive link width (mm/inches)
Number of drive links.
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.
Bar
Sharpening your chain and adjusting
depth gauge setting
•
Length (inches/cm)
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.
•
Number of teeth on bar tip sprocket (T).
•
A sharp chain eats its way through the wood and
produces long, thick chips or shavings.
•
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
•
The cutting part of the chain is called the cutter and
Sharpening cutting teeth
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).
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.
When you sharpen a cutting tooth there are four important
factors to remember.
1
Filing angle
•
•
Check that the chain is correctly tensioned. A slack
chain will move sideways, making it more difficult to
sharpen correctly.
2
Cutting angle
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 over and file the
teeth on the other side.
3
4
File position
Round file diameter
•
File all the teeth to the same length. When the length
of the cutting teeth is reduced to 4 mm (0.16") the
chain is worn out and should be replaced.
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.
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.
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.
!
WARNING! The risk of kickback is
increased if the depth gauge setting is
too large!
!
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GENERAL SAFETY PRECAUTIONS
Adjustment of depth gauge setting
•
Loosen the bar nut that holds the clutch cover and
chain brake. Use the combination spanner.
•
•
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.
•
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.
•
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.
•
Use the combination spanner to tighten the bar nut
while holding up the tip of the bar. Check that you can
pull the saw chain round freely by hand, and that there
is no slack on 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.
Tensioning the chain
Lubricating cutting equipment
WARNING! Poor lubrication of cutting
equipment may cause the chain to snap,
which could lead to serious, even fatal
injuries.
!
WARNING! A slack chain may jump off
and cause serious or even fatal injury.
!
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.
The more you use a chain the longer it becomes. It is
therefore important to adjust the chain regularly to take up
the slack.
As a chain saw manufacturer we have developed an
optimal chain oil which, with its vegetable oil base, is also
biodegradable. 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.
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.
Never use waste oil! Using waste oil can be dangerous
to you and damage the machine and environment.
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.
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GENERAL SAFETY PRECAUTIONS
Filling with chain oil
•
Check that the groove in the edge of the bar is clean.
Clean if necessary.
•
All our chain saws have an automatic chain lubrication
system. On some models the oil flow is also
adjustable.
•
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.
•
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).
If the chain lubrication system is still not working after
carrying out the above checks and associated measures
you should contact your service agent.
Chain drive sprocket
Checking chain lubrication
•
Check the chain lubrication each time you refuel. See
instructions under the heading Lubricating the bar tip
sprocket.
The clutch drum is fitted with a Spur sprocket (the chain
sprocket is welded on the drum).
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.
Regularly check the degree of wear on the drive sprocket.
Replace if wear is excessive. Replace the drive sprocket
whenever you replace the chain.
Checking wear on cutting equipment
Check the chain daily for:
If the chain lubrication is not working:
•
Check that the oil channel in the bar is not obstructed.
Clean if necessary.
•
•
•
Visible cracks in rivets and links.
Whether the chain is stiff.
Whether rivets and links are badly worn.
Replace the saw chain if it exhibits any of the points above.
We recommend you compare the existing chain with a
new chain to decide how badly the existing chain is worn.
When the length of the cutting teeth has worn down to
only 4 mm the chain must be replaced.
14 – English
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GENERAL SAFETY PRECAUTIONS
Bar
•
To prolong the life of the bar you should turn it over
daily.
Check regularly:
•
Whether there are burrs on the edges of the bar.
Remove these with a file if necessary.
WARNING! Most chain saw accidents
happen when the chain touches the
operator.
Wear personal protective equipment. See
instructions under the heading ”Personal
protective equipment”.
•
•
Whether the groove in the bar has become badly
worn. Replace the bar if necessary.
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.
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.
Avoid situations where there is a risk of
kickback. See instructions under the
′
heading Machine s safety equipment.
Use the recommended protective
equipment and check its condition. See
instructions under the headings
Technical data and General safety
precautions.
Check that all the chain saw safety
features are working. See instructions
under the headings General working
instructions and General safety
precautions.
Never use a chain saw by holding it with
one hand. A chain saw is not safely
controlled with one hand. Always have a
secure, firm grip around the handles with
both hands.
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ASSEMBLY
correctly located in the groove in the bar. Tighten the bar
nuts finger tight.
Fitting the bar and chain
WARNING! Always wear gloves, when
working with the chain.
!
Check that the chain brake is in disengaged position by
moving the front hand guard towards the front handle.
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. See instructions under the heading
Tensioning the chain.
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 nuts with the
combination spanner.
Unscrew the bar nut and remove the clutch cover (chain
brake). Take off the transportation guard.
When fitting a new chain, the chain tension has to be
checked frequently until the chain is run-in. Check the
chain tension regularly. A correctly tensioned chain
ensures good cutting performance and long life.
Fit the bar over the bar bolts. Place the bar in its rearmost
position. Place the chain over the drive sprocket locate it
in the groove on the bar. Begin on the top edge of the bar.
Fitting a spike bumper
To fit a spike bumper – contact your service agent.
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 the drive sprocket and that the chain is
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FUEL HANDLING
Mixing ratio
Fuel
1:50 (2%) with HUSQVARNA two-stroke oil or JASO FC
or ISO EGC GRADE.
Note! The machine is equipped with a two-stroke engine
and must always be run using a mixture of petrol and two-
stroke 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.
1:33 (3%) with oils class JASO FB or ISO EGB formulated
for air-cooled, two-stroke engines.
Petrol, litre
Two-stroke oil, litre
2% (1:50)
0,10
3% (1:33)
5
0,15
0,30
0,45
0,60
10
15
20
0,20
WARNING! Always ensure there is
adequate ventilation when handling fuel.
0,30
!
0,40
Petrol
Mixing
•
•
Use good quality unleaded or leaded petrol.
CAUTION! Engines equipped with catalytic
converters must be run on unleaded fuel
mixtures.
•
•
Leaded gasoline will destroy the catalytic converter
and it will no longer serve its purpose. The green fuel
cap on saws fitted with catalytic converters means
that only unleaded gasoline can be used.
•
•
Always mix the petrol and oil in a clean container
intended for fuel.
The lowest recommended octane grade 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 and increased bearing load,
which can result in serious engine damage.
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.
•
When working with continuous high revs (e.g.limbing)
a higher octane is recommended.
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.
Environment fuel
HUSQVARNA recommends the use of alkylate fuel, either
Aspen two-stroke fuel or environmental fuel for four-stroke
engines blended with two-stroke oil as set out below.Note
that carburettor adjustment may be necessary when
changing the type of fuel (see the instructions under the
heading Carburettor).
Chain oil
•
We recommend the use of special oil (chain oil) with
good adhesion characteristics.
Running-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 waste oil. This results in damage to the oil
pump, the bar and the chain.
Never use two-stroke oil intended for water-cooled
engines, sometimes referred to as outboard oil (rated
TCW).
It is important to use oil of the right grade (suitable
viscosity range) to suit the air temperature.
•
•
Never use oil intended for four-stroke engines.
In temperatures below 0°C (32°F) some oils become
too viscous.This can overload the oil pump and result
in damage to the oil pump components.
A poor oil quality and/or too high oil/fuel ratio may
jeopardise function and decrease the life time of
catalytic converters.
•
Contact your service agent when choosing chain oil.
English – 17
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FUEL HANDLING
•
Move the machine at least 3 m from the refuelling
point before starting it.
Fuelling
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.
•
Never start the machine:
Always stop the engine and let it cool for
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 cap slowly
so that any excess pressure is released
gently.
2
3
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.
Tighten the fuel cap carefully after
refuelling.
Always move the machine away from the
refuelling area before starting.
WARNING! Never use a machine with
visible damage to the spark plug guard
and ignition cable. A risk of sparking
arises, which can cause a fire.
!
Clean the area around the fuel cap. Clean the fuel and
chain oil tanks regularly. The fuel filter must be replaced
at least once a year. Contamination in the tanks causes
malfunction. Make sure the fuel is well mixed by shaking
the container before refuelling.The capacities of the chain
oil tank and fuel tank are carefully matched.You should
therefore always fill the chain oil tank and fuel tank at the
same time.
Transport and storage
•
Always store the chain saw and fuel so that there is no
risk of leakages or fumes coming into contact with
sparks or naked flames from electrical equipment,
electric motors, relays/switches, boilers and the like.
•
•
Always store fuel in an approved container designed
for 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 petrol station.
•
The bar guard must always be fitted to the cutting
attachment when the machine is being transported or
in storage, in order to prevent accident contact with
the sharp chain. Even a non-moving chain can cause
serious cuts to yourself or persons you bump into with
an exposed chain.
WARNING! Fuel and fuel vapour are
highly flammable.Take care when
!
handling fuel and chain oil. Be aware of
the risks of fire, explosion and those
associated with inhalation.
Long-term storage
Empty the fuel/oil tanks in a well ventilated area.Store the
fuel in approved cans in a safe place. Fit the bar guard.
Clean the machine. See instructions under the heading
Maintenance schedule.
Fuel safety
•
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).
Ensure the machine is cleaned and that a complete
service is carried out before long-term storage.
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STARTING AND STOPPING
Ignition: Set the stop switch to the start position.
Choke: Set the choke control in the choke position.
Starting and stopping
WARNING! Note the following before
starting:
!
The chain brake must be engaged when
the chain saw is started to reduce the
chance of contact with the moving chain
during starting.
Never start a chain saw unless the bar,
chain and all covers are fitted correctly.
Otherwise the clutch can come loose and
cause personal injuries.
Warm engine
Place the machine on firm ground. Make
sure you have a secure footing and that
the chain cannot touch anything.
If you need to start the chain saw in the
tree, see instructions under the heading
Starting the saw in the tree, under the
section Working techniques.
Use the same starting procedure as for a cold engine but
without setting the choke control in the choke position.
Keep people and animals well away from
the working area.
Starting
Cold engine
Starting: The chain brake must be engaged when the
chain saw is started. Activate the brake by moving the
front hand guard forwards.
Grip the front handle with your left hand and push the
chain saw to the ground. Grip the starter handle with your
right hand and pull out the starter cord slowly until you feel
a resistance (as the starter pawls engage) and then pull
firmly and rapidly. Never twist the starter cord around
your hand.
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.
Primer bulb: Press the air purge repeatedly until fuel
begins to fill the bulb. The bulb need not be completely
filled.
Push down the choke control as soon as the engine fires
which can be heard through a "puff" sound. Keep on
pulling the cord powerfully until the engine starts. When
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STARTING AND STOPPING
the engine starts, quickly apply full throttle; the throttle
•
Observe your surroundings and make sure that there
start lock will automatically disengage.
is no risk of people or animals coming into contact with
the cutting equipment.
IMPORTANT! As the chain brake is still engaged the
speed of the engine must be set to idling as soon as
possible, this is achieved by quickly disengaging the
throttle lock. This prevents unnecessary wear to the
clutch, clutch drum and brake band.
•
Always hold the saw with both hands. The right hand
should be on the top handle, and the left hand on the
front handle. All people, whether right or left handed,
should use this grip. Use a firm grip with thumbs and
fingers encircling the chain saw handles.
Note! Reactivate the chain brake by pushing the front
hand guard back towards the front handle.The chain saw
is now ready for use.
WARNING! Long term inhalation of the
engine’s exhaust fumes, chain oil mist
and dust from sawdust can represent a
health risk.
Stopping
!
•
Never start a chain saw unless the bar, chain and all
covers are fitted correctly. See instructions under the
heading Assembly. Without a bar and chain attached
to the chain saw the clutch can come loose and cause
serious injury.
The engine is stopped by pushing the stop switch to the
stop position.
•
The chain brake should be activated when starting.Se
instructions under the heading Start and stop. Do not
drop start. This method is very dangerous because
you may lose control of the saw.
•
Never start the machine indoors. Exhaust fumes can
be dangerous if inhaled.
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WORKING TECHNIQUES
Basic safety rules
Before use:
1
•
Look around you:
1
3
To ensure that people, animals or other things cannot
affect your control of the machine.
2
4
•
To make sure that none of the above might come
within reach of your saw or be injured by falling trees.
8
6
1
2
3
Check that the chain brake works correctly and is not
damaged.
Check that the throttle lockout works correctly and is
not damaged.
Check that the stop switch works correctly and is not
damaged.
CAUTION! Follow the instructions above, but do not use a
chain saw in a situation where you cannot call for help in
case of an accident.
4
5
Check that all handles are free from oil.
Check that the anti vibration system works and is not
damaged.
2
All tree maintenance work above ground level must be
carried out by two or more persons with the right
training (see instructions under the heading
Important). At least one person should be on the
ground to carry out safe rescue procedures and/or get
help should an emergency arise.
6
7
8
9
Check that the muffler is securely attached and not
damaged.
Check that all parts of the chain saw are tightened
correctly and that they are not damaged or missing.
Check that the chain catcher is in place and not
damaged.
3
4
5
During tree maintenance work above ground level, the
working area should always be secured and marked
out with signs, tape or the like. The person(s) on the
ground should always inform the person(s) working
above before they enter the secure working area.
Check the chain tension.
General working instructions
Do not use the machine in bad weather, such as
dense fog, heavy rain, strong wind, intense cold, etc.
Working in bad weather is tiring and often brings
added risks, such as icy ground, unpredictable felling
direction, etc.
IMPORTANT!
This section describes basic safety rules for using a
chain saw. 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 chain saw dealer, service agent or
an experienced chain saw user. Do not attempt any task
that you feel unsure of!
Take great care when removing small branches 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.
Before using a chain saw you must understand the
effects of kickback and how to avoid them. See
instructions under the heading How to avoid kickback.
Before using a chain saw you must understand the
difference between cutting with the top and bottom
edges of the bar. See instructions under the headings
How to avoid kickback and Machine’s safety equipment.
6
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
During tree maintenance work above ground level the
chain saw must be secured. Secure the chain saw by
attaching a safety line to the fixing eye on the chain saw.
Wear personal protective equipment. See instructions
under the heading ”Personal protective equipment”.
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WORKING TECHNIQUES
suddenly. Take great care when working on sloping
effect of kickback and lets you keep the chain saw
ground.
under control.
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.
7
Take great care when cutting a tree that is in tension.
A tree that is in tension may spring back to its normal
position before or after being cut. If you position
yourself incorrectly or make the cut in the wrong place
the tree may hit you or the machine and cause you to
lose control. Both situations can cause serious
personal injury.
8
Before moving your chain saw switch off the engine
and lock the chain using the chain brake. Carry the
chain saw with the bar and chain pointing backwards.
Fit a guard to the bar before transporting the chain
saw or carrying it for any distance.
Have control over the workpiece. If the pieces you
intend to cut are small and light, they can jam in the
saw chain and be thrown towards you. Even if this
does not need to be a danger, you may be surprised
and lose control of the saw. Never saw stacked logs or
branches without first separating them. Only saw one
log or one piece at a time. Remove the cut pieces to
keep your working area safe.
4
Never use the chain saw above shoulder height
and try not to cut with the tip of the bar. Never use
the chain saw one-handed!
9
When you put the chain saw on the ground, lock the
saw chain using the chain brake and ensure you have
a constant view of the machine. Switch the engine off
before leaving your chain saw for any length of time.
General rules
1
If you understand what kickback is and how it happens
then you can reduce or eliminate the element of
surprise. By being prepared you reduce the risk.
Kickback is usually quite mild, but it can sometimes be
very sudden and violent.
5
Always use a fast cutting speed, i.e. full throttle.
2
Always hold the chain saw firmly with your right hand
on the top handle and your left hand on the front
handle. Wrap your fingers and thumbs around the
handles.You should use this grip whether you are
right-handed or left-handed. This grip minimises the
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WORKING TECHNIQUES
6
If you have to cut branches or the like that are above
shoulder height, a working platform or scaffold tower
is recommended.
Working with tree service chain-saws
from a rope and harness
This chapter sets out working practices to reduce the risk
of injury from tree service chainsaws when working at
height from a rope and harness. While it may form the
basis of guidance and training literature, it should not be
regarded as a substitute for formal training.
General requirements working at height
Operators of tree service chainsaws working at height
from a rope and harness should never work alone. A
competent ground worker trained in appropriate
emergency procedures should assist them.
Operators of tree service chainsaws for this work should
be trained in general safe climbing and work positioning
techniques and shall properly equipped with harnesses,
ropes, strops, karabiners and other equipment for
maintaining secure and safe working positions for both
themselves and the saw.
7
Take great care when you cut with the top edge of the
bar, i.e. when cutting from the underside of the object.
This is known as cutting on the push stroke.The chain
tries to push the chain saw back towards the user. If
the saw chain is jamming, the saw may be pushed
back at you.
Preparing to use the saw in the tree
The chain saw should be checked, fuelled, started and
warmed up by the ground worker and the chain brake
should be engaged before it is sent up to the operator in
the tree. The chainsaw should be fitted with a suitable
strop for attaching to the operator’s harness:
a) choke the strop around the attachment point on the rear
of the saw.
8
Unless the user resists this pushing force there is a
risk that the chain saw will move so far backwards that
only the kickback zone of the bar is in contact with the
tree, which will lead to a kickback.
b) provide suitable karabiners to allow indirect (i.e. via the
strop) and direct attachment (i.e. at the attachment point
on the saw) of saw to the operators harness.
c) ensure the saw is securely attached when it is being
sent up to the operator.
Cutting with the bottom edge of the bar, i.e. from the
top of the object downwards, is known as cutting on
the pull stroke. In this case the chain saw pulls itself
towards the tree and the front edge of the chain saw
body rests naturally on the trunk when cutting. Cutting
on the pull stroke gives the operator better control over
the chain saw and the position of the kickback zone.
d) ensure the saw is secured to the harness before it is
disconnected from the means of ascent.
The saw should only be attached to the recommended
attachment points on the harness. These may be at mid-
point (front or rear) or at the sides. Where possible
attaching the saw to centre rear mid-point will keep it clear
of climbing lines and support its weight centrally down the
operator’s spine.
When moving the saw from any attachment point to another,
operators should ensure it is secured in the new position
before releasing it from the previous attachment point.
Using the chainsaw in the tree
An analysis of accidents with these saws during tree
service operations shows the primary cause as being
inappropriate one-handed use of the saw. In the vast
majority of accidents, operators fail to adopt a secure
work position witch allows them to hold both handles of
the saw. This results in an increased risk of injury due to:
9
Follow the instructions on sharpening and maintaining
your bar and chain. When you replace the bar and
chain use only combinations that are recommended
by us. See instructions under the headings Cutting
equipment and Technical data.
•
not having a firm grip on the saw if it kicks back.
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WORKING TECHNIQUES
•
•
a lack of control of the saw such that it is more liable
to contact climbing lines and operators body
(particularly the left hand and arm)
Freeing a trapped saw
If the saw should become trapped during cutting,
operators should:
loosing control from insecure work position resulting
in contact with the saw (unexpected movement during
operation of the saw)
•
switch off the saw and attach it securely to the tree
inboard (i.e. towards the truck side) of the cut or to a
separate tool line.
Securing the work position for two-handed use
•
•
pull the saw from the kerf whilst lifting the branch as
necessary.
To allow the operator to hold the saw with both hands,
they should as general rule, aim for secure work position
where they are operating the saw at:
if necessary, use a handsaw or second chain saw to
release the trapped saw by cutting a minimum of 30
cm away from the trapped saw.
•
•
hip level when cutting horizontal sections.
Whether a handsaw or a chainsaw is used to free a stuck
saw, the release cuts should always be outboard (toward the
tips of the branch), in order to prevent the saw being taken
with the section and further complicating the situation.
solar plexus level when cutting vertical sections.
Where the operator is working close into vertical stems
with a low lateral forces on their work position, then a good
footing may be all that is needed to maintain a secure
work position. However as operators move away from the
stem, they will need to take steps to remove or counteract
the increasing lateral forces by, for example, a re-direct of
the main line via a supplementary anchor point or using
an adjustable strop direct from the harness to a
supplementary anchor point.
Basic cutting technique
WARNING! Never use a chain saw by
holding it with one hand. A chain saw is
!
not safely controlled with one hand; you
can cut yourself. Always have a secure,
firm grip around the handles with both
hands.
Gaining a good footing at the working position can be
assisted by use of a temporary foot stirrup created from
an endless sling.
General
Starting the saw in the tree
•
•
Always use full throttle when cutting!
When starting the saw in the tree, the operator should:
a) apply the chain brake before starting.
Reduce the speed to idle after every cut (running the
engine for too long at full throttle without any load, i.e.
without any resistance from the chain during cutting,
can lead to serious engine damage).
b) hold saw on either the left or right of the body when
starting:
•
•
Cutting from above = Cutting on the pull stroke.
Cutting from below = Cutting on the push stroke.
1
on the left side hold the saw with the left hand on the
front handle and thrust the saw away from the body
while holding the pull starter cord in the other hand.
Cutting on the push stroke increases the risk of kickback.
See instructions under the heading How to avoid kickback.
2
on the right side, hold the saw with the right hand on
either handle and thrust the saw away from the body
while holding the pull starter cord in the left hand.
Terms
Cutting = General term for cutting through wood.
Limbing = Cutting branches off a felled tree.
The chain brake should always be engaged before
lowering a running saw onto its strop. Operators should
always check the saw has sufficient fuel before
undertaking critical cuts.
Splitting = When the object you are cutting breaks off
before the cut is complete.
One-hand use of the chainsaw
There are five important factors you should consider
before making a cut:
Operators should never use a chain saw onehanded.
Operators should never:
1
2
Make sure the cutting equipment will not jam in the
cut.
•
cut with the kickback zone at the tip of the chainsaw
guide bar
•
•
•
‘hold and cut’ sections.
attempt to catch falling sections.
Cut in the tree when he/she is only secured with one
rope, always use 2 secured lines.
Make sure the object you are cutting will not split.
•
check condition of harness, belt and ropes at regular
frequent intervals.
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WORKING TECHNIQUES
3
4
Make sure the chain will not strike the ground or any
other object during or after cutting.
- If it is possible (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.
Is there a risk of kickback?
The log is supported at one end. There is a high risk
that it will split.
5
Do the conditions and surrounding terrain affect how
safely you can stand and move about?
Two factors decide whether the chain will jam or the object
that you are cutting will split: the first is how the object is
supported before and after cutting, and the second is
whether it is in tension.
Start by cutting from below (about 1/3 of the way through).
- Finish by cutting from above so that the two cuts meet.
In most cases you can avoid these problems by cutting in
two stages; from the top and from the bottom.You need to
support the object so that it will not trap the chain or split
during cutting.
WARNING! If the chain jams in the cut:
stop the engine! Don’t try to pull the
!
chain saw free. If you do you may be
injured by the chain when the chain saw
suddenly breaks free. Use a lever to open
up the cut and free the chain saw.
The log is supported at both ends. There is a high risk
that the chain will jam.
The following instructions describe how to handle the
commonest situations you are likely to encounter when
using a chain saw.
Cutting
The log is lying on the ground. There is little risk of the
chain jamming or the object splitting. However there is a
risk that the chain will touch the ground when you finish
the cut.
- Start by cutting from above (about 1/3 of the way
through).
Cut all the way through the log from above. Avoid letting
the chain touch the ground as you finish the cut. Maintain
full throttle but be prepared for what might happen.
- Finish by cutting from below so that the two cuts meet.
English – 25
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WORKING TECHNIQUES
Limbing
•
Arrangement of branches
•
Weight of snow
When limbing thick branches you should use the same
approach as for cutting.
Cut difficult branches piece by piece.
You may find you are forced to let the tree-top fall in its
natural direction because it is impossible or dangerous to
try to make it fall in the direction you first intended.
Felling technique for tree tops
Another very important factor, which does not affect the
felling direction but does affect your safety, is to make sure
the tree has no damaged or dead branches that might
break off and hit you during felling.
WARNING! It takes a lot of experience to
fell a tree. Inexperienced users of chain
saws should not fell trees. Do not
attempt any task that you feel unsure of!
!
WARNING! During critical felling
operations, hearing protectors should be
lifted immediately when sawing is
completed so that sounds and warning
signals can be heard.
Safe distance
!
During tree maintenance work above ground level, the
working area must always be secured and marked out
with signs, tape or the like.The safe distance between the
top of the tree that is to be felled and the nearest
workplace must be at least 2 1/2 times the height of the
tree. Make sure that no-one else is in this risk zone before
or during felling.
Topping a tree
Topping a tree is done using three cuts.First you make the
directional cuts, which consist of the top cut and the
bottom cut, then you finish with the felling cut. By placing
these cuts correctly you can control the felling direction
very accurately.
Felling direction
The aim is to fell the tree in a position where you can limb
and cross-cut the log as easily as possible.You want it to
fall in a location where you can stand and move about
safely. The main thing to avoid is that the falling tree top
should get jammed in another tree. Taking down a
”jammed” tree top is very dangerous (see point 4 in this
section).
Directional cuts
To make the directional cuts you begin with the top cut.Try
to take your position in the tree on the right side and cut
on the pull stroke.
Next make the bottom cut so that it finishes exactly at the
end of the top cut.
Once you have decided which way you want the top of the
tree to fall you must assess which way the top of the tree
would fall naturally.
Several factors affect this:
•
•
•
Lean of the tree
Bend
Wind direction
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WORKING TECHNIQUES
The directional cuts should run 1/4 of the diameter
The felling hinge controls the direction that the tree falls in.
through the trunk and the angle between the top cut and
bottom cut should be 45°.
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.
The line where the two cuts meet is called the directional
cut line. This line should be perfectly horizontal and at
right angles (90°) to the chosen felling direction.
We recommend that you use a bar that is longer than the
diameter of the tree, so that you can make the felling cut
and directional cuts with single cutting strokes. See the
Technical data section to find out which lengths of bar are
recommended for your saw.
Felling cut
The felling cut is made from the opposite side of the tree
and it must be perfectly horizontal. Try to take a correct
position so you are able to cut on the pull stroke.
Make the felling cut about 3-5 cm (1.5-2 inches) above the
bottom directional cut.
There are methods for felling trees with a diameter larger
than the bar length. However these methods involve a
much greater risk that the kickback zone of the bar will
come into contact with the tree.
Set the spike bumper (if one is fitted) just behind the felling
hinge. Use full throttle and advance the chain/bar slowly
into the tree. Make sure the tree-top does not start to
move in the opposite direction to your intended felling
direction.
WARNING! Unless you have special
training we advise you not to fell trees
with a diameter larger than the bar length
of your saw!
!
Freeing a tree that has fallen badly
Cutting trees and branches that are in tension
Preparations:
Work out which side is in tension and where the point of
maximum tension is (i.e. where it would break if it was
bent even more).
Finish the felling cut parallel with the directional cut line so
that the distance between them is at least 1/10 of the
trunk diameter.The uncut section of the trunk is called the
felling hinge.
Decide which is the safest way to release the tension and
whether you are able to do it safely. In complicated
situations the only safe method is to put aside your chain
saw and use a winch.
English – 27
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WORKING TECHNIQUES
General advice:
Cutting the trunk into logs
Position yourself so that you will be clear of the tree or
branch when the tension is released.
See instructions under the heading Basic cutting
technique.
Make one or more cuts at or near the point of maximum
tension. Make as many cuts of sufficient depth as
necessary to 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!
How to avoid kickback
WARNING! Kickback can happen very
suddenly and violently; kicking the chain
!
saw, bar and chain back at the user. If
this happens when the chain 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.
What is kickback?
The word kickback is used to describe the sudden
reaction that causes the chain saw and bar to jump off an
object when the upper quadrant of the tip of the bar,
known as the kickback zone, touches an object.
Kickback always occurs in the cutting plane of the bar.
Normally the chain saw and bar are thrown backwards
and upwards towards the user. However, the chain saw
may move in a different direction depending on the way it
was being used when the kickback zone of the bar
touched the object.
Kickback only occurs if the kickback zone of the bar
touches an object.
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MAINTENANCE
•
The T-screw regulates the throttle setting at idle
General
The user must only carry out the maintenance and
service work described in this manual.
speed. If the T-screw is turned clockwise this gives a
higher idle speed; turning it anti-clockwise gives a
lower idle speed.
Basic settings and running in
IMPORTANT! Any maintenance other than that
described in this manual must be carried out by your
servicing dealer (retailer).
The basic carburettor settings are adjusted during testing
at the factory.Avoid running at a too high speed during the
first 10 hours.
Carburettor adjustment
CAUTION! If the chain rotates while idling theT-screw
must be turned anti-clockwise until the chain stops.
Due to existing environmental and emissions legislation
your chain saw is equipped with movement limiters on the
carburettor adjuster screws. These limit the adjustment
possibilities to a maximum of a 1/4 turn.
Rec. idle speed: 2900 rpm
Fine adjustment
When the machine has been ”run-in” the carburettor
should be finely adjusted. The fine adjustment should be
carried out by a qualified person. First adjust the L-jet,
then the idling screw T and then the H-jet.
H
L
1/4
1/4
Changing the type of fuel
Fine tuning may be required if the chain saw, after
changing the type of fuel, performs differently with regard
to starting, acceleration, maximum speed, etc.
Your Husqvarna product has been designed and
manufactured to specifications that reduce harmful
emissions.
Conditions
•
Before any adjustments are made the air filter should
be clean and the cylinder cover fitted. Adjusting the
carburettor while a dirty air filter is in use will result in
a leaner mixture next time the filter is cleaned. This
can give rise to serious engine damage.
Function
•
The carburettor governs the engine’s speed via the
throttle control. Air and fuel are mixed in the
carburettor. The air/fuel mixture is adjustable. Correct
adjustment is essential to get the best performance
from the machine.
•
•
•
Do not attempt to adjust the L and H jets beyond either
stop as this could cause damage.
Now start the machine according to the starting
instructions and let it warm up for 10 minutes.
•
•
Adjusting the carburettor means that the engine is
adapted to local operating conditions, e.g. climate,
altitude, petrol and the type of 2-stroke oil.
Place the machine on a flat surface so that the bar
points away from you and so that the bar and chain do
not come into contact with the surface or other objects.
The carburettor has three adjustment controls:
- L = Low speed jet
- H = High speed jet
Low speed jet L
- T = Idle adjustment screw
Turn the low speed jet L clockwise until it stops. If the
engine accelerates poorly or idles unevenly, turn the low
speed jet L anticlockwise until good acceleration and
idling are achieved.
Fine adjustment of the idle speedT
Adjust the idle speed with the T-screw. If it is necessary to
re-adjust, turn the T-screw clockwise while the engine is
running, until the chain starts to rotate. Then turn anti-
clockwise until the chain stops. When the idle speed is
correctly adjusted the engine should run smoothly in
every position and the engine speed should be safely
below the speed at which the chain starts to rotate.
•
The L and H-jets are used to adjust the supply of fuel
to match the rate that air is admitted, which is
controlled with the throttle. If they are screwed
clockwise the air/fuel ratio becomes leaner (less fuel)
and if they are turned anti-clockwise the ratio
becomes richer (more fuel). A lean mixture gives a
higher engine speed and a rich mixture gives a lower
engine speed.
WARNING! Contact your servicing
dealer, if the idle speed setting cannot be
adjusted so that the chain stops. Do not
use the chain saw until it has been
properly adjusted or repaired.
English – 29
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MAINTENANCE
Checking the front hand guard
High speed jet H
At the factory the engine is adjusted at sea level.
When working at a high altitude or in different
weather conditions, temperatures and atmospheric
humidity, it may be necessary to make minor
adjustments to the high speed jet.
Make sure the front hand guard is not damaged and that
there are no visible defects such as cracks.
CAUTION! If the high speed jet is screwed in too far,
it may damage the piston/cylinder.
When test run at the factory, the high speed jet is set so
that the engine satisfies the applicable legal requirements
at the same time as achieving maximum performance.
The carburettor’s high speed jet is then locked using a
limiter cap in the fully screwed out position.The limiter cap
limits the potential to adjust the high speed jet to at most
half a turn.
Move the front hand guard forwards and back to make
sure it moves freely and that it is securely anchored to the
clutch cover.
Correctly adjusted carburettor
When the carburettor is correctly adjusted the machine
accelerates without hesitation and 4-cycles a little at full
throttle. 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
lean the machine will have less power, poor acceleration
and could suffer damage to the engine.
Checking the brake trigger
Place the chain saw on firm ground and start it.Make sure
the chain does not touch the ground or any other object.
See the instructions under the heading Start and stop.
Checking, maintaining and
servicing chain saw safety
equipment
Note! All service and repair work on the machine
demands special training. This is especially true of the
machine’s safety equipment. If your machine fails any of
the checks described below we recommend that you
take it to your service workshop.
Grasp the chain saw firmly, wrapping your fingers and
thumbs around the handles.
Chain brake and front hand guard
Checking brake band wear
Brush off any wood dust, resin and dirt from the chain
brake and clutch drum.Dirt and wear can impair operation
of the brake.
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.
Regularly check that the brake band is at least 0.6 mm
thick at its thinnest point.
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MAINTENANCE
Throttle lockout
Vibration damping system
•
Make sure the throttle control is locked at the idle
setting when the throttle lockout is released.
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.
•
Press the throttle lockout and make sure it returns to
its original position when you release it.
Stop switch
•
•
Check that the throttle control and throttle lockout
move freely and that the return springs work properly.
Start the engine and make sure the engine stops when
you move the stop switch to the stop setting.
Start the chain saw and apply full throttle. Release the
throttle control and check that the chain stops and
remains stationary. If the chain rotates when the
throttle control is in the idle position you should check
the carburettor idle adjustment.
Muffler
Chain catcher
Never use a machine that has a faulty muffler.
Check that the chain catcher is not damaged and is firmly
attached to the body of the chain saw.
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MAINTENANCE
Regularly check that the muffler is securely attached to
the machine.
mesh will cause the engine to overheat and may lead to
serious damage.
Note! The mesh must be replaced if it is damaged. If the
mesh is blocked the machine will overheat and this will
cause damage to the cylinder and piston. Never use a
machine with a muffler that is in poor condition. Never
use a muffler if the spark arrestor mesh is missing or
defective.
Starter
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.
Loosen the screws (1 and 2).
Care must be exercised when replacing
the return spring or the starter cord.
Wear protective glasses and protective
gloves.
Changing a broken or worn starter cord
Push the muffler cover as shown in the picture.
•
Loosen the screws that hold the starter against the
crankcase and remove the starter.
Loosen the screws and nuts. Remove and check that the
muffler is ok.
•
Pull out the cord approx. 30 cm and hook it into the
notch in the rim of the pulley. Release the recoil spring
by letting the pulley rotate slowly backwards.
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.
The muffler is equipped with a special spark arrestor
mesh.The spark arrestor mesh should be cleaned once a
month. This is best done with a wire brush. A blocked
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MAINTENANCE
•
Undo the screw in the centre of the pulley and remove
Changing a broken recoil spring
the pulley. Insert and fasten a new starter cord to the
pulley. Wind approx. 3 turns of the starter cord onto
the pulley. Connect the pulley to the recoil spring so
that the end of the spring engages in the pulley. Fit the
screw in the centre of the pulley.Insert the starter cord
through the hole in the starter housing and the starter
handle. Make a secure knot in the end of the starter
cord.
•
Lift up the starter pulley. See instructions under the
heading Changing a broken or worn starter cord.
Remember that the recoil spring is coiled under
tension in the starter housing.
•
•
Remove the cassette with the recoil spring from the
starter.
Lubricate the recoil spring with light oil. Fit the
cassette with recoil spring in the starter. Fit the starter
pulley and tension the recoil spring.
Tensioning the recoil spring
•
Hook the starter cord in the notch in the pulley and
turn the starter pulley about 2 turns clockwise.
Note! Check that the pulley can be turned at least a
further 1/2 turn when the starter cord is pulled all the
way out.
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.
English – 33
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MAINTENANCE
Air filter
Spark plug
The air filter must be regularly cleaned to remove dust and
dirt in order to avoid:
The spark plug condition is influenced by:
•
•
Incorrect carburettor adjustment.
•
•
•
•
•
•
Carburettor malfunctions
Starting problems
An incorrect fuel mixture (too much or incorrect type of
oil).
Loss of engine power
•
A dirty air filter.
Unnecessary wear to engine parts.
Excessive fuel consumption.
These factors cause deposits on the spark plug
electrodes, which may result in operating problems and
starting difficulties.
Remove the air filter after taking off the air filter cover.
When refitting make sure that the air filter seals tightly
against the filter holder. Clean the filter by brushing or
shaking it.
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 0.65 mm.The
spark plug should be replaced after about a month in
operation or earlier if necessary.
The filter can be cleaned more thoroughly by washing it in
water and detergent.
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.
Note! Always use the recommended spark plug type! Use
of the wrong spark plug can damage the piston/cylinder.
Check that the spark plug is fitted with a suppressor.
Lubricating the bar tip sprocket
A HUSQVARNA chain saw can be equipped with different
types of air filter according to working conditions, weather,
season, etc. Contact your dealer for advice.
Lubricate the bar tip sprocket each time you refuel. Use
the special grease gun and a good quality bearing grease.
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MAINTENANCE
Adjustment of the oil pump
Cooling system
The oil pump is adjustable. Adjustments are made by
turning the screw with a screwdriver. Turning the screw
clockwise will increase the oil flow, turning it anticlockwise
will reduce the oil flow.
To keep the working temperature as low as possible the
machine is equipped with a cooling system.
The cooling system consists of:
1
2
3
4
5
Air intake on the starter.
Air guide plate.
Fins on the flywheel.
Cooling fins on the cylinder.
Clutch cover
The oil tank should become nearly empty by time fuel is
used up. Be sure to refill the oil tank every time when
refueling the saw.
WARNING! The engine must not be
running when making adjustments.
!
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.
English – 35
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MAINTENANCE
Maintenance schedule
The following is a list of the maintenance that must be performed on the machine. Most of the items are described in the
Maintenance section.
Daily maintenance
Weekly maintenance
Monthly maintenance
Check the brake band on the chain
brake for wear. Replace when less
than 0.6 mm (0,024 inch) remains at
the most worn point.
On chain saws without a catalytic
converter, check the cooling system
weekly.
Clean the outside of the machine.
Check that the components of the
throttle control work safely. (Throttle
lockout and throttle control.)
Check the starter, starter cord and
return spring.
Check the clutch centre, clutch drum
and clutch spring for wear.
Clean the chain brake and check that
it operates safely. Make sure that the Check that the vibration damping
Clean the spark plug. Check that the
electrode gap is 0.65 mm.
chain catcher is undamaged, and
replace it if necessary.
elements are not damaged.
The bar should be turned daily for
more even wear. Check the
lubrication hole in the bar, to be sure it File off any burrs from the edges of
is not clogged. Clean the bar groove. the bar.
If the bar has a sprocket tip, this
Clean the outside of the carburettor.
should be lubricated.
Check that the bar and chain are
getting sufficient oil.
Clean or replace the spark arrestor
mesh on the muffler.
Check the fuel filter and the fuel hose.
Replace if necessary.
Check the saw chain with regard to
visible cracks in the rivets and links,
whether the saw chain is stiff or
whether the rivets and links are
abnormally worn. Replace if
necessary.
Empty the fuel tank and clean the
inside.
Clean the carburettor compartment.
Sharpen the chain and check its
tension and condition.Check the drive Clean the air filter. Replace if
Empty the oil tank and clean the
inside.
sprocket for excessive wear and
replace if necessary.
necessary.
Clean the starter units air intake.
Check all cables and connections.
Check that nuts and screws are tight.
Check that the stop switch works
correctly.
Check that there are no fuel leaks
from the engine, tank or fuel lines.
On chain saws with a catalytic
converter, check the cooling system
daily.
Check the condition of the air filter.
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MAINTENANCE
Technical data
T435
Engine
Cylinder displacement, cm3
35,2
Cylinder bore, mm
40
Stroke, mm
28
Idle speed, rpm
2900
12500
1,5/10000
Recommended max. speed, rpm
Power, kW/ rpm
Ignition system
Manufacturer of ignition system
Type of ignition system
Spark plug
Ikeda Denso
CD
NGK CMR7H
0,5
Electrode gap, mm
Fuel and lubrication system
Manufacturer of carburettor
Carburettor type
Walbro
WT 804
0,26
Fuel tank capacity, litre
Oil pump capacity at 9,500 rpm, ml/min
Oil tank capacity, litre
Type of oil pump
3-9
0,17
Automatic
Weight
Chain saw without bar or chain, empty tanks, kg
Noise emissions (see note 1)
3,4
Sound power level, measured dB(A)
Sound power level, guaranteed LWA dB(A)
Sound levels (see note 2)
112
114
Equivalent sound pressure level at operator’s ear, measured
according to relevant international standards, dB(A)
103
Vibration levels (see note 3)
Front handle, m/s2
Rear handle, m/s2
4,1
3,9
Chain/bar
Standard bar length, inch/cm
Recommended bar lengths, inch/cm
Usable cutting length, inch/cm
Chain speed at max. power, m/sec
Pitch, inch/mm
14"/35
12-14”/30-35
11-13”/28-33
19,1
3/8" /9,52
0,050/1,3
6
Thickness of drive links, inch/mm
Number of teeth on drive sprocket
Note 1: Noise emissions in the environment measured as sound power (L ) in conformity with EC directive 2000/14/EC.
WA
Note 2: Equivalent sound pressure level, according to ISO 22868, is calculated as the time-weighted energy total for
noise pressure levels under various working conditions with the following time distribution: 1/3 idling, 1/3 max. load,
1/3 max. speed.
Note 3: Equivalent vibration level, according to ISO 22867, is calculated as the time-weighted energy total for vibration
levels under various working conditions with the following time distribution: 1/3 idling, 1/3 max. load, 1/3 max. speed.
English – 37
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MAINTENANCE
Bar and chain combinations
The following combinations are CE approved.
Bar
Chain
Length, inch Pitch, inch Gauge, mm Max. nose radius
Type
Length, drive links (no.)
12
14
16
3/8
3/8
3/8
0,050
0,050
0,050
7 T
7T
7T
45
52
56
Husqvarna H36
Saw chain filing and file gauges
EC-declaration of conformity
(Applies to Europe only)
Husqvarna AB, SE-561 82 Huskvarna, Sweden, tel +46-36-146500, declares under sole responsibility that the chain
saw HusqvarnaT435 from 2009’s serial numbers and onwards (the year is clearly stated in plain text on the type plate
with subsequent serial number), is in conformity with the requirements of the COUNCIL’S DIRECTIVES:
- of June 22, 1998 ”relating to machinery” 98/37/EC, annex IIA.
- of December 15, 2004 ”relating to electromagnetic compatibility” 2004/108/EC.
- of May 8, 2000 ”relating to the noise emissions in the environment” 2000/14/EC.
For information relating to noise emissions, see the chapter Technical data.The following standards have been applied:
CISPR 12:2001, EN ISO 11681-2.
Notified body: 0404, SMP Svensk Maskinprovning AB, Fyrisborgsgatan 3, SE-754 50 Uppsala, Sweden, has carried
out EC type examination in accordance with the machinery directive’s (98/37/EC) article 8, point 2c.The certificates for
EC type examination in accordance with annex VI, have the numbers: 404/08/1276
In addition, SMP, Svensk Maskinprovning AB, Fyrisborgsgatan 3, SE-754 50 Uppsala, Sweden, has certified conformity
with annex V of the Council’s Directive of May 8, 2000 ”relating to the noise emissions in the environment” 2000/14/EC.
The certificates have the numbers: 01/161/080
The supplied chain saw conforms to the example that underwent EC type examination.
Huskvarna January 9, 2009
Bengt Frögelius, Development director chainsaw R&D
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