Symbols on the mac hine and/or in
the operator’s man
ARNING! Chain saws can be dangerous!
Careless or improper use can result in
ious or f
ser
others.
Please read the operator’s manual
carefully and mak
the instructions before using the
machine.
Always wear:
• Approved protective helmet
• Approved hearing protection
• Protective goggles or a visor
Both of the operator
to oper
Never operate a chain saw holding it with
one hand only.
Contact of the guide bar tip with any object
m
WARNING! Kickback may occur when
the nose or tip of the guide bar touches
an object, and cause a lightning f
re
up and towards the operator. May cause
serious personal injury.
Chain brake, activated (right)
Chain brak
Decompression v alve: Press
the valv
cylinder and make starting easier. You
should always use the decompression
valve when starting the machine.
Ignition; choke: Set the choke control
in the chok
automatically set the stop switch to the
start position.
Air purge
Adjustment of the oil pump
Other symbols/decals on the machine refer to special
cer
atal injury to the operator or
e sure y
′
ate the chain sa
ust be a
voided.
verse reaction, kicking the guide bar
e to reduce the pressure in the
tification requirements f
s hands must be used
e, not activated (left)
e position.
This should
ual:
ou understand
w.
ast
or certain markets.
Switch off the engine b y moving the
stop switch to the ST
before carrying out any checks or
maintenance.
Always wear approved protective
glo
Regular cleaning is required.
Visual check.
Protective goggles or a visor must
be w
Refuelling.
Filling with oil and adjusting oil flow.
The chain brake should be activated
when star
v
es.
n.
or
ting.
OP position
For Canada onl y:
Recommended cutting
equipment in this example:
- Bar length 20 inches
- Max tooth count for the
bar nose sproc
- Chain type Husqvarna H80
Other approved bar and chain
combinations in Operator’
Measured maximum kickback value with
ake for the bar and chain combination
br
on the label.
Measured maximum kickback value
without tr
and chain combination on the label.
k
et is 11T
ing the brake, for the bar
igger
s Manual.
– English
1153137-49 Rev .1 2009-12-29
KEY T O SYMBOLS
You will find the following labels on your chain saw:
USA:
Chain Saw
IN ACCORDANCE WITH
ANSI B175.1-2000
Canada:
EP
A III
The Emissions Compliance P eriod referred to on the
Emission Compliance label indicates the number of
oper
ating hours for which the engine has been shown to
meet Federal emissions requirements.
Maintenance, replacement, or repair of the emission
control de
vices and system may be performed by any
nonroad engine repair establishment or individual.
echnical data ....................................................... 40
Saw chain filing and file gauges ........................... 41
FEDERAL EMISSION CONTR OL WARRANTY
ST
A
TEMENT
OUR WARRANTY RIGHTS AND OBLIGATIONS 42
AMERICAN ST ANDARD SAFETY
PRECAUTIONS
Saf ety precautions f
or chain saw users ................ 43
– English
1153137-49 Rev .1 2009-12-29
ODUCTION
INTR
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 Kar
of muskets. The location was logical, since water power was harnessed from the Huskvarna River to create the waterpowered 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 pr
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 author
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
the second-hand value of the machine can be e
borrower or buyer gets the operator
Thank you for using a Husqvarna product!
ity. We develop, manufacture and market high quality motor driven products for forestry and gardening as
ior
ual as a valuable document. By following its
′
s man
l XI ordered the construction of a factory on the banks of the Huskvarna River, for production
ized dealers, ask for the address of your nearest servicing dealer .
′
′
s manual, so they will also know how to properly maintain and use it.
xtended. If you ever lend or sell this machine, make sure that the
content (using, service, maintenance etc) the life span and
Husqvarna AB has a policy of continuous product development and therefore reserves the right to modify the design and
appearance of products without pr
ior notice.
1153137-49 Rev .1 2009-12-29
English – 5
6
25
11
24
2331 32
12
23
22
13
21
14
20
WHA T IS WHA
15
18
19
17
30
16
10
29
T?
9
1
2
3
4
5
8
6
7
27
26
28
What is what on the chain saw?
1 Cylinder cover
2 Starter handle
3 Air purge
4 Stop switch (Ignition on/off switch.)
5 Rear handle
6 Choke control/Start throttle lock
7 Fuel tank
8 Adjuster screws, carburetor
9 Starter
10 Chain oil tank
11 Throttle lockout
12 Decompression valve
13 Front handle
14 Front hand guard
15 Muffler
16 Bar tip sprocket
– English
17 Chain
18 Bar
19 Bumper spike
20 Chain tensioning screw
21 Chain catcher
22 Oil pump adjustment screw
23 Clutch cover
24 Right hand guard
25 Throttle control
26 Operator
27 Combination spanner
28 Bar guard
29 Information and warning decal
30 Product and serial number plate
31 Chain tensioner wheel (455e Rancher)
32 Knob (455e Rancher)
′s manual
1153137-49 Rev.1 2009-12-29
GENERAL SAFETY PRECAUTIONS
!
!
!
!
!
!
Before using a new chain saw
• Please read this manual carefully.
• Check that the cutting equipment is correctly fitted
and adjusted. See instr
Assembly.
• Refuel and start the chain saw. See the instructions
under the headings Fuel Handling and Star
Stopping.
• Do not use the chain saw until sufficient chain oil has
reached the chain.
heading Lubricating cutting equipment.
• Long-term exposure to noise can result in permanent
ing impairment. So always use approv ed hearing
hear
protection.
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. Your warranty may not
cover damage or liability caused by the
use of non-authorized accessories or
replacement parts.
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! The inside of the muffler
contain chemicals that may be carcino-
!
genic. Av oid contact with these elements
in the event of a damaged muffler.
WARNING! 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.
uctions under the heading
ting and
See instructions under the
For Canada only:
WARNING! When using a chain saw, a
fire extinguisher should be available.
WARNING! Keep handles dry, clean and
free of oil.
WARNING! Beware of carbon monoxide
poisoning. Operate the chainsaw in well
ventilated areas only.
WARNING! Do not attempt a pruning or
limbing operation in a standing tree
unless specifically trained to do so.
Important
IMPORTANT!
This chain saw for forest service is designed for forest
k such as felling, delimbing and cutting.
wor
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 ”P
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 instr
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 man
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! 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.
ersonal protectiv
.
uctions described in this
ual.
See instructions under
e equipment”.
1153137-49 Rev.1 2009-12-29
English – 7
GENERAL SAFETY PRECAUTIONS
!
Always use common sense
It is not possible to cover ev ery conceivab le situation y ou
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 sa w 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 improv e the design and
technology - impro
efficiency. Visit your dealer regularly to see whether you
can benefit from new features that have been introduced.
Personal protective equipment
!
v
ements that increase your safety and
WARNING! Most chain saw accidents
happen when the chain touches the
operator. You must use approved
personal protective equipment whenever
you use the machine. Per sonal 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.
• 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
restr
icting your freedom of movement.
IMPORT ANT! 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
ied out correctly and if ser
carr
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.
vice and/or repairs are not
• Approved protective helmet
• Hearing protection
8 – English
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.
1153137-49 Rev.1 2009-12-29
GENERAL SAFETY PRECAUTIONS
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
our left hand) or automatically by the inertia
(by y
release mechanism.
• The brake is applied when the front hand guard (B) is
pushed forw
ards.
• Use the chain brake as a ”parking brake” when
starting and when mo
reduce the risk of moving chain accidentally hitting
your leg or anyone or anything close by.
ving over short distances, to
• This movement activates a spring-loaded mechanism
that tightens the brak
drive system (D) (clutch drum).
• The front hand guard is not designed solely to activate
the chain br
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
sa
ted to prevent the saw chain from rotating.
w is star
e band (C) around the engine
ak
e. Another important feature is that it
• To release the chain brake pull the front hand guard
• Kickback can be very sudden and violent. Most
• The way the chain brake is activ ated, either manually
ards, towards the front handle.
backw
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.
y the iner
or automatically b
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.
If you get a violent kickback while the kickbac k zone of
the bar is f
designed to be activated by the inertia in the kickback
direction.
ar
thest away from you the chain brake is
tia release mechanism,
1153137-49 Rev.1 2009-12-29
English – 9
GENERAL SAFETY PRECAUTIONS
If the kickback is less violent or the kickback zone of
the bar is closer to you the chain brake is designed to
be activated manually by the movement of your left
hand.
• In the felling position the left hand is in a position that
mak
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.
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 ma y 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 activ
br
ake; for example, when the saw chain is held in felling
position.
Will my inertia activated chain brake
always activate during kickback in the
event of a kickback?
No. First y our brak e must be in w orking order . Testing the
brake is simple, see instructions under the heading
Checking, maintaining and servicing chain saw safety
equipment. We recommend you do bef ore you begin each
work session. Second the kickback must be strong
enough to activate the chain brake. If the chain brake is
too sensitive it would activate all the time which would be
a nuisance.
ual activation of the chain brake
es man
ate the chain
Will my chain brake always protect me
from injury in the event of a kickback?
No. First, the chain brake must be in working order to
provide the intended protection. Second, it must be
activated during the kickback as described above to stop
the saw chain. Third, the chain brake ma y be activated but
if the bar is too close to you the brake might not have
enough time to slow down and stop the chain before the
chain saw hits you.
Only you and proper working technique can eliminate
kickback and its danger.
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 g rasp 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.
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).
Right hand guard
Apart from protecting your hand if the chain jumps or
snaps, the right hand guard stops branches and twigs
from interfering with your grip on the rear handle.
10 – English
1153137-49 Rev.1 2009-12-29
GENERAL SAFETY PRECAUTIONS
!
Vibration damping system
Your machine is equipped with a vibration damping
system that is designed to reduce vibration and make
operation easier.
In areas with a hot, dry climate there is a high risk of fires.
These areas are sometimes subject to go
requiring among other things the muffler must be
equipped with an approved type of spark arrestor screen.
v
ernment rules
The machine
transfer of vibration between the engine unit/cutting
equipment and the machine
chain saw, including the cutting equipment, is insulated
from the handles by vibration damping units.
Cutting hardwoods (most broadleaf trees) creates more
vibr
with cutting equipment that is blunt or faulty (wrong type
or badly sharpened) will increase the vibration level.
′s vibration damping system reduces the
′s handle unit. The body of the
ation than cutting softw
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 symptoms may be
increased in cold temperatures.
oods (most conifers). Cutting
Stop switch
Use the stop switch to switch off the engine.
CAUTION! The muffler gets very hot during and after
use. This also applies during idling. Be aware of the fire
hazard, especially when working near flammable
substances and/or vapours.
WARNING! 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. If a
spark arrestor screen is required in your
area, never use the saw without or with a
broken spark arrestor screen.
Cutting equipment
This section describes how to choose and maintain your
cutting equipment in order to:
• 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.
General rules
• Only use cutting equipment recommended by us!
See instructions under the heading Technical data.
•
Keep the chain’s cutting teeth properly
sharpened! Follow our instructions and use the
recommended file gauge.
sharpened chain increases the risk of accidents.
.
A damaged or badly
Muffler
The muffler is designed to keep noise levels to a minimum
and to direct exhaust fumes away from the user.
WARNING! The exhaust fumes from the
engine are hot and may contain sparks
!
which can start a fire. Never start the
machine indoors or near combustible
material!
1153137-49 Rev.1 2009-12-29
•
Maintain the correct depth gauge setting! Follow
our instructions and use the recommended depth
gauge clearance.
the risk of kickback.
Too large a clearance increases
English – 11
GENERAL SAFETY PRECAUTIONS
• 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.
Keep cutting equipment well lubricated and
•
properly maintained!
more likely to break and lead to increased wear on the
bar, chain and drive 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.
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 wellmaintained you can reduce the effects of kickback.
Bar
The smaller the tip radius the lower the chance of
kickback.
Chain
A chain is made up of a number of links, which are
available in standard and low-kickback versions.
IMPORTANT! No saw chain design eliminates the
danger of kickback.
A poorly lubricated chain is
Bar
• Length (inches/cm)
• Number of teeth on bar tip sprocket (T).
• Chain pitch (inches). The spacing between the drive
links of the chain must match the spacing of the teeth
on the bar tip sprocket and drive sprocket.
• Number of drive links. The number of drive links is
mined by the length of the bar, the chain pitch
deter
and the number of teeth on the bar tip sprocket.
• Bar groove width (inches/mm). The groove in the bar
ust match the width of the chain dr
m
• Chain oil hole and hole for chain tensioner. The bar
must be matched to the chain saw design.
Chain
• Chain pitch (inches)
ive 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.
12 – English
• Drive link width (mm/inches)
• Number of drive links.
1153137-49 Rev.1 2009-12-29
GENERAL SAFETY PRECAUTIONS
!
Sharpening your chain and adjusting
depth gauge setting
General information on sharpening cutting teeth
• Never use a blunt chain. When the chain is blunt you
have to exert more pressure to force the bar through
the wood and the chips will be very small. If the chain
is very blunt it will produce wood powder and no chips
or shavings.
• A sharp chain eats its way through the wood and
produces long, thic
k chips or sha
vings.
gauge. This will help you obtain the maximum kickback
reduction and cutting performance from your chain.
See instructions under the heading Technical data for
infor
mation about sharpening your chain.
WARNING! Departure from the
sharpening instructions considerably
increases the risk of kickback.
Sharpening cutting teeth
• The cutting part of the chain is called the cutter and
consists of a cutting tooth (A) and the depth gauge
The cutters cutting depth is determined by the
(B).
difference in height between the two (depth gauge
setting).
When you sharpen a cutting tooth there are four important
factors to remember.
1 Filing angle
2 Cutting angle
3 File position
4 Round file diameter
To sharpen cutting teeth you will need a round file and a
file gauge. See instructions under the heading Technical
data for information on the size of file and gauge that are
recommended for the chain fitted to your chain saw.
• Check that the chain is correctly tensioned. A slack
chain will mo
sharpen correctly.
• Always file cutting teeth from the inside face. Reduce
the pressure on the retur
one side first, then turn the chain saw and file the teeth
on the other side.
• File all the teeth to the same length. When the length
of the cutting teeth is reduced to 5/32 inch (4 mm) the
chain is w
v
e sideways, making it more difficult to
n strok
e. File all the teeth on
or
n out and should be replaced.
It is very difficult to sharpen a chain correctly without the
right equipment.
1153137-49 Rev.1 2009-12-29
We recommend that you use our file
English – 13
GENERAL SAFETY PRECAUTIONS
!
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.
WARNING! The risk of kickback is
increased if the depth gauge setting is
!
too large!
Adjustment of depth gauge setting
Tensioning the chain
WARNING! A slack chain may jump off
and cause serious or even fatal injury.
The more you use a chain the longer it becomes. It is
therefore important to adjust the chain regularly to take up
the slack.
Check the chain tension every time you refuel. NOTE! A
new chain has a r
should check the tension more frequently.
Tension the chain as tightly as possible, but not so tight
that you cannot pull it round freely b
unning-in period during which you
y hand.
• 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 y
e the correct depth gauge setting and bevel for
acheiv
the depth gauge.
• Place the depth gauge tool over the chain. Detailed
ormation regarding the use of the depth gauge tool,
inf
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.
ou use our depth gauge tool to
455 Rancher, 460 Rancher
• Loosen the bar nuts that hold the clutch cover/chain
brake. Use the combination spanner . Then tighten the
bar nuts by hand as tight as you can.
• Raise the tip of the bar and stretch the chain by
tightening the chain tensioning scre
combination spanner. Tighten the chain until it does
not sag from the underside of the bar.
• Use the combination spanner to tighten the bar nuts
while lifting the tip of the bar at the same time
that you can pull the chain round freely by hand and
that it does not sag from the underside of the bar.
The position of the chain tensioning screw on our chain
saws varies from model to model. See instructions under
the heading What is what? to find out where it is on your
model.
w using the
.
Check
14 – English
1153137-49 Rev.1 2009-12-29
GENERAL SAFETY PRECAUTIONS
!
455e Rancher
• Release the knob by folding it out.
• Turn the knob anti clockwise to loosen the bar cover.
• Adjust the tension on the chain by turning the wheel
down (+) for tighter tension and up (-) to loosen the
tension.
Lubricating cutting equipment
WARNING! Poor lubrication of cutting
equipment may cause the chain to snap,
which could lead to serious, even fatal
injuries.
Chain oil
Chain oil must demonstrate good adhesion to the chain
and also maintain its flow characteristics regardless of
whether it is warm summer or cold winter weather.
As a chain saw manufacturer we have developed an
optimal chain oil which has a vegetab
recommend the use of our own oil for both maximum
chain life and to minimise environmental damage. If our
own chain oil is not available, standard chain oil is
recommended.
Never use waste oil! Using waste oil can be dangerous
to you and damage the machine and environment.
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.
Filling with chain oil
• All our chain saws have an automatic chain lubrication
system. On some models the oil flow is also
adjustable.
le oil base. We
• Tighten the bar clutch by turning the knob clockwise.
• Fold the knob back in to lock the tensioning.
1153137-49 Rev.1 2009-12-29
• The saw chain oil tank and the fuel tank are designed
so that the fuel runs out bef
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 weak 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). The above conditions
also apply to chain saw models with an adjustable oil
pump.
ore the saw chain oil.
English – 15
GENERAL SAFETY PRECAUTIONS
Checking chain lubrication
• Check the chain lubrication each time you refuel. See
instructions under the heading Lubricating the bar tip
sprocket.
Aim the tip of the bar at a light coloured surface about
20 cm (8 inches) aw
throttle you should see a distinct line of oil on the light
surface.
ay. After 1 minute running at 3/4
Chain drive sprocket
The clutch drum is fitted with one of the following drive
sprockets:
A Spur sprocket (the chain sprocket is welded on the
drum)
B Rim sprocket (replaceable)
If the chain lubrication is not working:
• Check that the oil channel in the bar is not obstructed.
Clean if necessary
• Check that the groove in the edge of the bar is clean.
Clean if necessar
• Check that the bar tip sprocket turns freely and that
the lubricating hole in the tip sprocket is not blocked.
Clean and lubricate if necessary.
If the chain lubrication system is still not working after
ying out the abo
carr
you should contact your servicing dealer.
.
y
.
ve checks and associated measures
Regularly check the degree of wear on the drive sprocket.
Replace if wear is e
whenever you replace the chain.
Needle bearing lubrication
Both versions of sprockets have a needle bearing on the
drive shaft, which has to be greased regularly (once a
week). CA UTION! Use only high quality bearing grease or
engine oil.
See instructions under the heading Maintenance, Needle
ing lubr
bear
Checking wear on cutting equipment
Check the chain daily for:
• 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
abo
e.
v
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 (5/32 inch) the chain must be replaced.
xcessive. Replace the drive sprocket
ication.
16 – English
1153137-49 Rev.1 2009-12-29
GENERAL SAFETY PRECAUTIONS
!
Bar
Check regularly:
• Whether there are burrs on the edges of the bar.
Remov
e these with a file if necessary.
• Whether the groove in the bar has become badly
or
n. Replace the bar if necessary.
w
• Whether the tip of the bar is uneven or badly worn. If
a hollow f
orms on the underside of the bar tip this is
due to running with a slack chain.
• To prolong the life of the bar you should turn it over
daily.
WARNING! Most chain saw accidents
happen when the chain touches the
operator.
Wear personal protective equipment. See
instructions under the heading
”Personal protective equipment”.
Do not tackle any job that you feel you
are not adequately trained for. See
instructions under the headings
Personal protective equipment, How to
avoid kickback, Cutting equipment and
General working instructions.
Avoid situations where there is a risk of
kickback. See instructions under the
heading Machine
Use the recommended protective
equipment and check its condition. See
instructions under the heading General
working instructions.
Check that all the chain saw safety
features are working. See instructions
under the headings General working
instructions and General safety
precautions.
′s safety equipment.
1153137-49 Rev.1 2009-12-29
English – 17
ASSEMBLY
Fitting the bar and chain
WARNING! Always wear gloves, when
working with the chain.
!
455 Rancher, 460 Rancher
Check that the chain brake is in disengaged position by
moving the front hand guard towards the front handle.
Remove the bar nuts and remove the clutch co ver (chain
ak
e). Take off the transportation ring (A).
br
Fit the bar over the bar bolts. Place the bar in its rearmost
position. Place the chain o
in the groove on the bar . Begin on the top edge of the bar.
ver the drive sprocket locate it
Tension the chain by turning the chain tensioning screw
kwise using the combination spanner
cloc
should be tensioned until it does not sag from the
underside of the bar.
The chain is correctly tensioned when it does not sag from
the underside of the bar
hand. Hold up the bar tip and tighten the bar nuts with the
combination spanner.
When fitting a new chain, the chain tension has to be
k
ed frequently until the chain is run-in. Check the
chec
chain tension regularly. A correctly tensioned chain
ensures good cutting performance and long life.
, b
ut can still be turned easily by
. The chain
455e Rancher
Check that the chain brake is in disengaged position by
moving the front hand guard towards the front handle.
Make sure that the edges of the cutting links are facing
orward on the top edge of the bar.
f
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
correctly located in the groove in the bar. Tighten the bar
nuts finger tight.
18 – English
Remove the knob and remove the clutch cover (chain
brake). Take off the transportation ring.
1153137-49 Rev.1 2009-12-29
ASSEMBLY
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.
Make sure that the edges of the cutting links are facing
orw
ard on the top edge of the bar.
f
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
correctly located in the groove in the bar. Tighten the bar
nuts finger tight.
Tension the chain by turning the wheel down (+). The
chain should be tensioned until it does not sag from the
underside of the bar
.
The chain is correctly tensioned when it does not sag from
the underside of the bar, but can still be turned easily by
hand. Hold up the bar tip and tighten the bar knob by
turning the knob clockwise.
When fitting a new chain, the chain tension has to be
ed frequently until the chain is run-in. Check the
k
chec
chain tension regularly. A correctly tensioned chain
ensures good cutting performance and long life.
1153137-49 Rev.1 2009-12-29
English – 19
FUEL HANDLING
Fuel
Note! The machine is equipped with a two-stroke engine
and must always be run using a mixture of gasoline 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.
WARNING! Always ensure there is
adequate ventilation when handling fuel.
!
Gasoline
• Use good quality unleaded gasoline.
•
CAUTION! Engines equipped with catalytic
converters must be run on unleaded fuel
mixtures.
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.
• The lowest recommended octane grade is 87
((R
octane grade than 87 so-called knocking can occur.
This gives rise to a high engine temperature and
increased bearing load, which can result in serious
engine damage.
• When working with continuous high revs (e.g. limbing)
a higher octane is recommended.
Environment fuel
HUSQVARNA recommends the use of alkylate fuel or
environmental fuel for four-stroke engines blended with
two-stroke oil as set out below. Note that carburetor
adjustment may be necessary when changing the type of
fuel (see instructions under the heading Carburetor).
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 two-stroke oil intended for water-cooled
engines, sometimes ref
TCW).
• Never use oil intended for four-stroke engines.
Leaded gasoline will destroy the catalytic
ON+MON)/2).
If you run the engine on a lower
erred to as outboard oil (rated
Mixing ratio
1:50 (2%) for all engines.
Gasoline, litreTwo-stroke oil, litre
2% (1:50)
5
100,20
150,30
200,40
US gallonUS fl. oz.
1
2 1/26 1/2
512 7/8
0,10
2 1/2
Mixing
• Always mix the gasoline and oil in a clean container
intended for fuel.
• Always start by filling half the amount of the gasoline
to be used.
(shake) the fuel mixture. Add the remaining amount of
gasoline.
• Mix (shake) the fuel mixture thoroughly before filling
the machine’
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.
Then add the entire amount of oil. Mix
s fuel tank.
.
Chain oil
• We recommend the use of special oil (chain oil) with
good adhesion characteristics.
• Never use waste oil. This results in damage to the oil
, the bar and the chain.
pump
• It is important to use oil of the right grade (suitable
viscosity range) to suit the air temperature.
20 – English
1153137-49 Rev.1 2009-12-29
FUEL HANDLING
!
• In temperatures below 0°C (32°F) some oils become
too viscous. This can ov erload the oil pump and result
in damage to the oil pump components.
• Contact your service agent when choosing chain oil.
Fueling
WARNING! Taking the following
precautions, will lessen the risk of fire:
!
Do not smoke and do not place any hot
objects in the vicinity of fuel.
Always stop the engine and let it cool for
a few minutes before refuelling.
When refuelling, open the fuel cap slowly
so that any excess pressure is released
gently.
Tighten the fuel cap carefully after
refuelling.
Always move the machine awa y fr om the
refuelling area before starting.
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.
WARNING! Fuel and fuel vapor are highly
flammable. Take care when handling fuel
!
and chain oil. Be aware of the risks of
fire, explosion and those associated with
inhalation.
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).
•
Move the machine at least 3 m from the refuelling
point before starting it.
• Never start the machine:
1 If you have spilled fuel or chain oil on the machine.
Wipe off the spillage and allow remaining fuel to
e
vaporate.
2 If you have spilled fuel on yourself or your clothes,
change your clothes
has come in contact with fuel. Use soap and water.
3 If the machine is leaking fuel. Check regularly for
leaks from the fuel cap and fuel lines.
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.
. W ash any part of your body that
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
or that pur
f
• 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 tr
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.
• Secure the machine during transport.
pose.
anspor
ted or
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.
Ensure the machine is cleaned and that a complete
service is carried out before long-term storage.
1153137-49 Rev.1 2009-12-29
English – 21
STARTING AND STOPPING
Starting and stopping
WARNING! Note the following before
starting:
!
Decompression valve (C): Press the valve to reduce the
pressure in the cylinder and make starting easier. You
should always use the decompression valve when
starting the machine. Once the machine has started the
valve will automatically return to its original setting.
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.
Place the machine on firm ground. Make
sure you have a secure footing and that
the chain cannot touch anything.
Keep people and animals well away from
the working area.
Never wrap the starter cord around your
hand.
Starting: The chain brake should be activated when
starting the chain saw. Activate the chain brake by
pushing the front hand guard forwards.
Cold engine
Stopswitch; choke (A): Set the choke control in the
choke position by pull the choke control outwards. This
automatically sets the stop switch to the start position.
Air purge (B): Press the air purge repeatedly (at least 6
times) until fuel begins to fill the bulb. The bulb need not
be completely filled.
B
A
C
Pull the starter handle (D): Pull the starter handle with
your right hand and pull out the starter cord slowly until
you feel a resistance (as the starter pawls engage) then
pull firmly and rapidly until the engine fires. Push in 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.
Warm engine
Ignition; choke (A): The correct choke/start throttle
setting for warm starting is obtained by moving the choke
control to the choke position and then pushing it in again.
Start throttle: The correct choke/start throttle setting is
obtained by moving the control as stated above.
Air purge (B): Press the air purge repeatedly (at least 6
times) until fuel begins to fill the bulb. The bulb need not
be completely filled.
Decompression valve (C): Press the valve to reduce the
pressure in the cylinder and make starting easier. You
should always use the decompression valve when
starting the machine. Once the machine has started the
valve will automatically return to its original setting.
Pull the starter handle (D): Pull the starter handle with
your right hand and pull out the starter cord slowly until
you feel a resistance (as the starter pawls engage) then
pull firmly and rapidly until the engine fires.
22 – English
1153137-49 Rev.1 2009-12-29
STARTING AND STOPPING
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 disengaging the throttle lock.
Disengagement is done by gently touching on the throttle
trigger. This prevents unnecessary wear to the clutch,
clutch drum and brake band.
Allow the machine to idle a few seconds before giving full
.
throttle
UTION! Do not pull the starter cord all the way out and
CA
do not let go of the starter handle when the cord is fully
extended. This can damage the machine.
Note!
Pull the front hand guard towards the front handle. The
chain brak
e is now disengaged. Your saw is ready f or use .
• The chain brake should be activated when starting.
• Never start the machine indoors. Exhaust fumes can
• Observe your surroundings and make sure that there
•
uctions under the heading Start and stop. Do
Se instr
not drop start. This method is very dangerous
because you may lose control of the saw.
be dangerous if inhaled.
isk of people or animals coming into contact
is no r
with the cutting equipment.
Always hold the saw with both hands. The right hand
should be on the rear handle
front handle
should use this grip. Use a firm grip with thumbs and
fingers encircling the chain saw handles.
. All people, whether right or left handed,
, and the left hand on the
WARNING! Long term inhalation of the
engine’s exhaust fumes, chain oil mist
!
and dust from sawdust can represent a
health risk.
• Never start a chain saw unless the bar, chain and all
ers are fitted correctly. See instructions under the
cov
heading Assembly. Without a bar and chain attached
to the chain saw the clutch can come loose and cause
serious injury.
1153137-49 Rev.1 2009-12-29
Stopping
Stop the engine by switching off the ignition.
English – 23
Before use:
WORKING TECHNIQUES
• To make sure that none of the above might come
within reach of your sa
,
w or be injured by falling trees.
1 Check that the chain brake works correctly and is not
damaged.
2 Check that the rear right hand guard is not damaged.
3 Check that the throttle lockout works correctly and is
not damaged.
4 CCheck that the stop switch works correctly and is not
damaged.
5 Check that all handles are free from oil.
6 Check that the anti vibration system works and is not
damaged.
7 Check that the muffler is securely attached and not
damaged.
8 Check that all parts of the chain saw are tightened
correctly and that the
9
Check that the chain catcher is in place and not
damaged.
10 Check the chain tension.
y are not damaged or missing.
General working instructions
IMPORTANT!
This section describes basic safety rules for using a
w
chain sa
professional skills and experience. If you get into a
situation where you feel unsafe, stop and seek expert
advice. Contact your chain sa w dealer , service agent or
an experienced chain saw user. Do not attempt any task
that you feel unsure of!
Before using a chain saw you must understand the
eff
instructions under the heading How to avoid kickback.
Before using a chain saw you must understand the
difference betw
edges of the bar. See instructions under the headings
How to avoid kickbac k and Machine’ s saf ety equipment.
Wear personal protective equipment. See instructions
under the heading ”Personal protective equipment”.
Basic safety rules
1 Look around you:
• T o ensure that people , animals or other things cannot
. This information is never a substitute for
ects of kic
affect y
kback and how to avoid them. See
een cutting with the top and bottom
our control of the machine.
CAUTION! Follow the instructions abov e, but do not use a
w in a situation where y
chain sa
case of an accident.
2 Do not use the machine in bad weather, such as
dense fog, hea
Working in bad weather is tiring and often brings
added risks, such as icy ground, unpredictable felling
direction, etc.
3 Take great care when removing small branches and
v
oid cutting bushes (i.e. cutting man y small branches
a
at the same time). Small branches can be grab bed by
the chain and thrown back at you, causing serious
injury.
4 Make sure you can move and stand saf ely. Chec k the
area around y
branches, ditches, etc.) in case you have to move
suddenly. Take great care when working on sloping
ground.
5 Take great care when cutting a tree that is under
tension.
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.
6 Before moving your chain saw switch off the engine
and loc
chain saw with the bar and chain pointing backwards.
vy rain, strong wind, intense cold, etc.
ou for possible obstacles (roots, rocks,
A tree that is under tension ma
k the chain using the chain brake. Carry the
ou cannot call for help in
y spring back
24 – English
1153137-49 Rev.1 2009-12-29
WORKING TECHNIQUES
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, 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. Ne ver saw stac ked logs or
branches without first separating them. Only sa w one
log or one piece at a time. Remove the cut pieces to
keep your working area safe.
y can jam in the
7 When you put the chain saw on the ground, lock the
saw chain using the chain br
a constant view of the machine. Switch the engine off
before leaving your chain saw for any length of time.
WARNING! Sometimes chips get stuck in
the clutch cover causing the chain to
!
jam. Always stop the engine before
cleaning.
ake and ensure you have
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.
2 Always hold the chain saw firmly with your right hand
on the rear handle and y
handle. Wrap your fingers and thumbs around the
handles. You should use this grip whether you are
right-handed or left-handed. This grip minimizes the
effect of kickback and lets you keep the chain saw
under control.
3 Most kickback accidents happen during limbing. Mak e
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
kbac
kic
branch, nearby tree or some other object.
Do not let go of the handles!
k zone of the bar accidentally touches a
our left hand on the front
Never use the chain saw above shoulder height
4
and avoid cutting with the tip of the bar . Ne ver use
the chain saw one-handed!
5 In order to keep control of your saw, always maintain
a firm foothold. Nev er work on a ladder , in a tree or on
any other insecure support.
6 Always use a fast cutting speed, i.e. full throttle.
1153137-49 Rev.1 2009-12-29
English – 25
WORKING TECHNIQUES
7 T ak e 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 with a pushing chain. 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.
8 Unless the user resists this pushing force there is a
isk that the chain sa
r
only the kickback zone of the bar is in contact with the
tree, which can lead to a kickback.
w will move so far backw ards that
Cutting with a pushing chain increases the risk of
kbac
k. See instructions under the heading How to
kic
avoid kickback.
Terms
Cutting = General term for cutting through wood.
Limbing = Cutting branches off a felled tree.
Splitting = When the object you are cutting breaks off
ore the cut is complete
bef
There are five important factors you should consider
before making a cut:
1 Make sure the cutting equipment will not jam in the
cut.
2 Make sure the object you are cutting will not split.
.
Cutting with the bottom edge of the bar, i.e. from the
top of the object do
a pulling chain. 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
with a pulling chain gives the operator better control
over the chain saw and the position of the kickback
zone.
9 Follow the instructions on sharpening and maintaining
our bar and chain.
y
chain use only combinations that are recommended
by us. See instructions under the headings Cutting
equipment and Technical data.
wnw
ards, is known as cutting with
When you replace the bar and
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.
Always have a secure, firm grip around
the handles with both hands.
General
• Always use full throttle when cutting!
• Reduce the speed to idle after every cut (running the
engine for too long at full throttle without an
without any resistance from the chain during cutting,
can lead to serious engine damage).
• Cutting from above = Cutting with a pulling chain.
• Cutting from below = Cutting with a pushing chain.
y load, i.e.
3 Make sure the chain will not strike the ground or any
other object during or after cutting.
Is there a risk of kickback?
4
5 Do the conditions and surrounding terrain affect how
ely you can stand and move about?
saf
T wo factors decide whether the chain will jam or the object
that you are cutting will split:
supported before and after cutting, and the second is
whether it is in tension.
In most cases you can avoid these problems b y cutting in
two stages;
support the object so that it will not trap the chain or split
during cutting.
IMPORTANT! If the chain jams in the cut: stop the
engine! Don’t try to pull the chain saw free. If you do y ou
may be injured by the chain when the chain saw
suddenly breaks free. Use a le ver to open up the cut and
free the chain saw.
The following instructions describe how to handle the
common situations you are likely to encounter when using
a chain saw.
from the top and from the bottom. You need to
the first is how the object is
26 – English
1153137-49 Rev.1 2009-12-29
WORKING TECHNIQUES
Limbing
When limbing thick branches you should use the same
approach as for cutting.
Cut difficult branches piece by piece.
2
1
3
Turn the log and finish the cut from the opposite side.
The log is supported at one end. There is a high risk
that it will split.
Cutting
WARNING! Never attempt to cut logs
while they are in a pile or when a couple
!
of logs are lying together. Such
procedures drastically increase the risk
of kickback which can result in a serious
or fatal injury.
If you have a pile of logs, each log you attempt to cut
should be removed from the pile, placed on a saw horse
or runners and cut individually.
Remove the cut pieces from the cutting area. By leaving
them in the cutting area, you increase the r
inadvertently getting a kickback, as well as increasing the
risk of losing your balance while working.
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.
Cut all the way through the log from above. Avoid letting
the chain touch the g
full throttle but be prepared for what might happen.
round as y
ou finish the cut. Maintain
isk for
Start by cutting from below (about 1/3 of the way through).
Finish by cutting from above so that the two cuts meet.
The log is supported at both ends. There is a high risk
that the chain will jam.
Start by cutting from above (about 1/3 of the way through).
Finish by cutting from below so that the two cuts meet.
Tree felling technique
IMPORTANT! 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!
Safe distance
The safe distance between a tree that is to be felled and
anyone else working nearby is at least 2 1/2 tree lengths.
Make sure that no-one else is in this ”risk zone” before or
during felling.
If it is possible (can you turn the log?) stop cutting about
2/3 of the w
1153137-49 Rev.1 2009-12-29
a
y through the log.
English – 27
WORKING TECHNIQUES
!
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 w ant it to
fall in a location where you can stand and move about
safely.
Once you have decided which wa y you want the tree to fall
ou m
ust judge which way the tree would fall naturally.
y
Several factors affect this:
• Lean of the tree
• Bend
• Wind direction
• Arrangement of branches
• Weight of snow
• Obstacles within the reach of the tree: for example,
other trees
• Look for signs of damage and rot in the stem, this
makes it more probably that the tree will break and
start to fall before you expect it to.
Y ou ma y find you are f orced to let the tree fall in its natur al
direction because it is impossib
make it fall in the direction you first intended.
Another very important factor, which does not affect the
felling direction b
the tree has no damaged or dead branches that might
break off and hit you during felling.
The main point to avoid is letting the tree fall onto another
.
It is very dangerous to remove a trapped tree and
tree
there is high accident risk. See instructions under the
heading Freeing a tree that has fallen badly.
wer lines, roads and buildings.
, po
le or dangerous to try to
ut does affect your safety , is to mak e sure
Clearing the trunk and preparing your retreat
Delimb the stem up to shoulder height. It is safer to work
from the top down and to have the tree between you and
the saw.
Remove any undergrowth from the base of the tree and
check the area f
etc.) so that you have a clear path of retreat when the tree
starts to fall. Your path of retreat should be roughly 135
degrees away from the intended felling direction.
Felling
or obstacles (stones, branches, holes,
Danger zone
Felling direction
Retreat path
Danger zone
Danger zone
Retreat path
WARNING! Unless you have special
training we advise you not to fell trees
with a diameter larger than the bar length
of your saw!
IMPORTANT! During critical felling operations, hearing
protectors should be lifted immediately when sawing is
completed so that sounds and warning signals can be
heard.
28 – English
Felling 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.
Directional cuts
To make the directional cut you begin with the top cut. Aim
using to the saw’s f elling direction mark (1) toward a goal
further forward in the terrain, where you would like the tree
to fall (2). Stand on the right-hand side of the tree, behind
the saw, and cut with a pull stroke.
1153137-49 Rev.1 2009-12-29
WORKING TECHNIQUES
Next make the bottom cut so that it finishes exactly at the
end of the top cut.
All control over the felling direction is lost if the felling
hinge is too narro
cuts and felling cut are badly placed.
w or non-existent, or if the directional
The directional cuts should run 1/4 of the diameter
through the trunk and the angle between the top cut and
bottom cut should be 45
The line where the two cuts meet is called the directional
cut line.
This line should be perfectly horizontal and at
right angles (90
Felling cut
The felling cut is made from the opposite side of the tree
and it must be perfectly horizontal. Stand on the left side
of the tree and cut on the pull stroke.
Make the felling cut about 3-5 cm (1.5-2 inches) above the
bottom directional cut.
Finish the felling cut parallel with the directional cut line so
that the distance between them is at least 1/10 of the
unk diameter. The uncut section of the trunk is called the
tr
felling hinge.
The felling hinge controls the direction that the tree falls in.
°.
°) to the chosen felling direction.
When the felling cut and directional cut are complete the
tree should start to f
wedge or breaking bar.
We recommend that you use a bar that is longer than the
diameter of the tree
and directional cuts with single cutting strokes. See
instructions under the heading Technical data section to
find out which lengths of bar are recommended for your
saw.
There are methods for felling trees with a diameter larger
than the bar length.
much greater risk that the kickback zone of the bar will
come into contact with the tree.
all by itself or with the aid of a felling
, so that y
However these methods involve a
ou can make the felling cut
1153137-49 Rev.1 2009-12-29
English – 29
WORKING TECHNIQUES
Freeing a tree that has fallen badly
Freeing a ”trapped tree”
It is very dangerous to remove a trapped tree and there is
high accident risk.
Never try to fell the tree that is trapped.
Never work in the risk zone of the hanging trapped tree.
The safest method is to use a winch.
• Tractor-mounted
Make one or more cuts at or near the point of maximum
tension. Mak
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!
If you must cut across tree/limb, make two to three cuts,
one inch apart, one to two inches deep.
Continue to cut deeper until tree/limb bends and tension
is released.
e as many cuts of sufficient depth as
• Portable
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).
Decide which is the safest way to release the tension and
whether y
situations the only safe method is to put aside your chain
saw and use a winch.
General advice:
Position yourself so that you will be clear of the tree or
branch when the tension is released.
ou are ab
le to do it safely. In complicated
Cut tree/limb from outside the bend, after tension has
been released.
30 – English
1153137-49 Rev.1 2009-12-29
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