Husqvarna 334 T Owner's Manual
Operator ′ s manual
Manuel d’utilisation
334T 338XPT
Please read the operator’s manual carefully and make sure you understand the instructions before using the machine.
Lire attentivement et bien assimiler le manuel d’utilisation avant d’utiliser la machine.
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KEY TO SYMBOLS
Symbols on the machine:
WARNING! Chain saws can be dangerous!
Careless or improper use can result in
serious or fatal injury to the operator or
others.
Please read the operator’s manual
carefully and make sure you understand
the instructions before using the
machine.
Always wear:
• Approved protective helmet
• Approved hearing protection
• Protective goggles or a visor
Both of the operator′s hands must be used
to operate the chain saw.
Never operate a chain saw holding it with
one hand only.
Never let the guide bar tip come in contact
with any object.
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.
Recommended cutting equipment
in this example:
- Bar length 14 inches
- Max. nose radius 7 Teeth
- Chain type Husqvarna H36
Other approved bar and chain
combinations in Operator’s Manual.
Symbols in the operator’s
manual:
Switch off the engine by moving the
stop switch to the STOP position before
carrying out any checks or
maintenance.
Working position
Choke
Always wear approved protective
gloves.
Regular cleaning is required.
Visual check.
Protective goggles or a visor must be
worn.
Refuelling.
Filling with oil and adjusting oil flow.
Measured maximum kickback value
without triggering the brake, for the bar and
chain combination on the label.
Chain brake, activated (right)
Chain brake, not activated (left)
Other symbols/decals on the machine refer to special
certification requirements for certain markets.
2 – English
The chain brake should be activated
when starting.
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.
KEY TO SYMBOLS
You will find the following labels on your chain saw::
EPA III
The Emissions Compliance Period referred to on the
Emission Compliance label indicates the number of
operating hours for which the engine has been shown to
meet Federal and Californian emissions requirements.
Maintenance, replacement, or repair of the emission
control devices and system may be performed by any
nonroad engine repair establishment or individual.
The engine exhaust from this product
contains chemicals known to the State
of California to cause cancer, birth
defects or other reproductive harm.
English
3
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CONTENTS
Contents
KEY TO SYMBOLS
Symbols on the machine: ...................................... 2
Symbols in the operator’s manual: ........................ 2
CONTENTS
Contents ............................................................... 4
INTRODUCTION
Dear customer! ..................................................... 5
WHAT IS WHAT?
What is what on the chain saw? ........................... 6
GENERAL SAFETY PRECAUTIONS
Before using a new chain saw .............................. 7
Important .............................................................. 7
Always use common sense .................................. 8
Personal protective equipment ............................. 8
Machine′s safety equipment ................................. 8
Cutting equipment ................................................. 11
ASSEMBLY
Fitting the bar and chain ....................................... 17
FUEL HANDLING
Fuel ....................................................................... 18
Fueling .................................................................. 19
Fuel safety ............................................................ 19
STARTING AND STOPPING
Starting and stopping ............................................ 20
WORKING TECHNIQUES
Before use: ............................................................ 22
General working instructions ................................ 22
How to avoid kickback ........................................... 29
MAINTENANCE
Carburetor ............................................................. 30
Checking, maintaining and servicing chain saw
safety equipment .................................................. 31
Muffler ................................................................... 33
Starter ................................................................... 33
Air filter .................................................................. 34
Spark plug ............................................................. 35
Lubricating the bar tip sprocket ............................. 35
Adjustment of the oil pump ................................... 35
Cooling system ..................................................... 35
Maintenance schedule .......................................... 36
TECHNICAL DATA
Technical data ....................................................... 37
Bar and chain combinations, model 334T ............ 38
Bar and chain combinations, model 338XPT ........ 38
Saw chain filing and file gauges ........................... 38
FEDERAL AND CALIFORNIA EMISSIONS
CONTROL WARRANTY STATEMENT
YOUR WARRANTY RIGHTS AND
OBLIGATIONS ...................................................... 39
AMERICAN STANDARD SAFETY
PRECAUTIONS
Safety precautions for chain saw users ................ 41
4 – English
INTRODUCTION
Dear customer!
Congratulations on your choice to buy a Husqvarna product! Husqvarna is based on a tradition that dates back to 1689,
when the Swedish King Karl XI ordered the construction of a factory on the banks of the Huskvarna River, for production
of muskets. The location was logical, since water power was harnessed from the Huskvarna River to create the 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 priority. We develop, manufacture and market high quality motor driven products for forestry and gardening as
well as for building and construction industry.
Your purchase gives you access to professional help with repairs and service whenever this may be necessary. If the
retailer who sells your machine is not one of our authorized dealers, ask for the address of your nearest servicing dealer.
It is our wish that you will be satisfied with your product and that it will be your companion for a long time. Think of this
operator′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 ever lend or sell this machine, make sure that the borrower
or buyer gets the operator′s manual, so they will also know how to properly maintain and use it.
Thank you for using a Husqvarna product!
Husqvarna AB has a policy of continuous product development and therefore reserves the right to modify the design and
appearance of products without prior notice.
English – 5
WHAT IS WHAT?
What is what on the chain saw?
1 Filter cover
2 Adjuster screws, carburetor
3 Starter
4 Fuel tank
5 Chain oil tank
6 Chain tensioning screw (334T)
7 Bumper spike
8 Front hand guard
9 Information and warning decal
10 Stop and choke control: Ignition on/off switch Choke
control/Start throttle lock Working position
11 Air purge
12 Top handle
13 Fixing eye for safety line
14 Spark plug cap
15 Starter handle
6 – English
16 Front handle
17 Oil pump adjustment screw
18 Throttle lockout
19 Throttle trigger
20 Guide bar
21 Saw chain
22 Bar tip sprocket
23 Chain catcher
24 Chain tensioning screw (338XPT)
25 Product and serial number plate
26 Clutch cover with built-in chain brake.
27 Muffler
28 Guide bar cover
29 Combination spanner
30 Operator ′ s manual
!
!
!
!
!
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 instructions under the heading
Assembly.
• Refuel and start the chain saw. See the instructions
under the headings Fuel Handling and Starting and
Stopping.
• Do not use the chain saw until sufficient chain oil has
reached the chain. See instructions under the heading
Lubricating cutting equipment.
• Long-term exposure to noise can result in permanent
hearing impairment. So always use approved hearing
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. Avoid 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! 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 tree service is designed for pruning
and dismantling standing tree crowns.
You should only use the saw with the bar and chain
combinations we recommend in the chapter Technical
data.
Never use the machine if you are fatigued, while under
the influence of alcohol or drugs, medication or anything
that could affect your vision, alertness, coordination or
judgement.
Wear personal protective equipment. See instructions
under the heading ”Personal protective equipment”.
Do not modify this product or use it if it appears to have
been modified by others.
Never use a machine that is faulty. Carry out the checks,
maintenance and service instructions described in this
manual. Some maintenance and service measures
must be carried out by trained and qualified specialists.
See instructions under the heading Maintenance.
Never use any accessories other than those
recommended in this manual. See instructions under
the headings Cutting equipment and Technical data.
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! This machine produces an
electromagnetic field during operation.
!
This field may under some circumstances
interfere with active or passive medical
implants. To reduce the risk of serious or
fatal injury, we recommend persons with
medical implants to consult their physician and the medical implant manufacturer before operating this machine.
WARNING! When using a chain saw, a
fire extinguisher should be available.
!
WARNING! Running an engine in a
confined or badly ventilated area can
result in death due to asphyxiation or
carbon monoxide poisoning.
WARNING! Faulty cutting equipment or
the wrong combination of bar and saw
chain increases the risk of kickback!
Only use the bar/saw chain combinations
we recommend, and follow the filing
instructions. See instructions under the
heading Technical data.
English
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7
GENERAL SAFETY PRECAUTIONS
!
Always use common sense
It is not possible to cover every conceivable situation you
can face when using a chain saw. Always exercise care
and use your common sense. Avoid all situations which
you consider to be beyond your capability. If you still feel
uncertain about operating procedures after reading these
instructions, you should consult an expert before
continuing. Do not hesitate to contact your dealer or us if
you have any questions about the use of the chain saw.
We will willingly be of service and provide you with advice
as well as help you to use your chain saw both efficiently
and safely. Attend a training course in chain saw usage if
possible. Your dealer, forestry school or your library can
provide information about which training materials and
courses are available.
• Protective goggles or a visor
• Gloves with saw protection
• Trousers with saw protection
• Use appropriate protections for arm.
• Boots with saw protection, steel toe-cap and non-slip
sole
• Always have a first aid kit nearby.
• Fire Extinguisher and Shovel
Generally clothes should be close-fitting without
restricting your freedom of movement.
IMPORTANT! Sparks can come from the muffler, the bar
and chain or other sources. Always have fire
extinguishing tools available if you should need them.
Help prevent forest fires.
Work is constantly in progress to improve the design and
technology - improvements that increase your safety and
efficiency. Visit your dealer regularly to see whether you
can benefit from new features that have been introduced.
Personal protective equipment
WARNING! Most chain saw accidents
happen when the chain touches the
!
operator. You must use approved
personal protective equipment whenever
you use the machine. Personal protective
equipment cannot eliminate the risk of
injury but it will reduce the degree of
injury if an accident does happen. Ask
your dealer for help in choosing the right
equipment.
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.
• Approved protective helmet
• Hearing protection
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.
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.
Machine ′′
In this section the machine’s safety features and their
function are explained. For inspection and maintenance
see instructions under the heading Checking, maintaining
and servicing chain saw safety equipment. See
instructions under the heading, What is what?, to find
where these parts are located on your machine.
The life span of the machine can be reduced and the risk
of accidents can increase if machine maintenance is not
carried out correctly and if service and/or repairs are not
carried out professionally. If you need further information
please contact your nearest servicing dealer.
′′
s safety equipment
8 – English
GENERAL SAFETY PRECAUTIONS
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.
• 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.
Chain brake and front hand guard
Your chain saw is equipped with a chain brake that is
designed to stop the chain if you get a kickback. The chain
brake reduces the risk of accidents, but only you can
prevent them.
Take care when using your saw and make sure the
kickback zone of the bar never touches any object.
• The chain brake (A) can either be activated manually
(by your left hand) or automatically by the inertia
release mechanism.
• The brake is applied when the front hand guard (B) is
pushed forwards.
B
B
A
• This movement activates a spring-loaded mechanism
that tightens the brake band (C) around the engine
drive system (D) (clutch drum).
• The chain brake must be engaged when the chain
saw is started to prevent the saw chain from rotating.
• Use the chain brake as a ”parking 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.
• To release the chain brake pull the front hand guard
backwards, towards the front handle.
• Kickback can be very sudden and violent. Most
kickbacks are minor and do not always activate the
chain brake. If this happens you should hold the chain
saw firmly and not let go.
• The way the chain brake is activated, either manually
or automatically by 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.
If you get a violent kickback while the kickback zone of
the bar is farthest away from you the chain brake is
English
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9
GENERAL SAFETY PRECAUTIONS
designed to be activated by the inertia in the kickback
direction.
If the kickback is less violent or the kickback zone of
the bar is closer to you the chain brake is designed to
be activated manually by the movement of your left
hand.
• In the felling position the left hand is in a position that
makes manual activation of the chain brake
impossible. With this type of grip, that is when the left
hand is placed so that it cannot affect the movement
of the front hand guard, the chain brake can only be
activated by the inertia action.
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.
Will my chain brake always protect me
from injury in the event of a kickback?
No. First, the chain brake must be in working order to
provide the intended protection. Second, it must be
activated during the kickback as described above to stop
the saw chain. Third, the chain brake may be activated but
if the bar is too close to you the brake might not have
enough time to slow down and stop the chain before the
chain saw hits you.
Only you and proper working technique can eliminate
kickback and its danger.
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.
A
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.
10 – English
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).
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.
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.
•
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!
In areas with a hot, dry climate there is a high risk of fires.
These areas are sometimes subject to government rules
requiring among other things the muffler must be
equipped with an approved type of spark arrestor screen.
Cutting hardwoods (most broadleaf trees) creates more
vibration than cutting softwoods (most conifers). Cutting
with cutting equipment that is blunt or faulty (wrong type
or badly sharpened) will increase the vibration level.
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.
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
English
11
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GENERAL SAFETY PRECAUTIONS
• 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.
• 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! A poorly lubricated chain is
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.
Guide 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
determined by the length of the bar, the chain pitch
and the number of teeth on the bar tip sprocket.
• 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 wellmaintained you can reduce the effects of kickback.
Guide bar
The smaller the tip radius the lower the chance of kickback.
Saw 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.
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
• Chain oil hole and hole for chain tensioner. The bar
must be matched to the chain saw design.
Saw chain
• Chain pitch (inches)
• Drive link width (mm/inches)
• Number of drive links.
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, thick chips or shavings.
• The cutting part of the chain is called the cutter and
consists of a cutting tooth (A) and the depth gauge
(B). The cutters cutting depth is determined by the
difference in height between the two (depth gauge
setting).
gauge. This will help you obtain the maximum kickback
reduction and cutting performance from your 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.
Sharpening cutting teeth
To sharpen cutting teeth you will need a round file and a
file gauge. See instructions under the heading Technical
data for information on the size of file and gauge that are
recommended for the chain fitted to your chain saw.
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
It is very difficult to sharpen a chain correctly without the
right equipment. We recommend that you use our file
• Check that the chain is correctly tensioned. A slack
chain will move sideways, making it more difficult to
sharpen correctly.
• Always file cutting teeth from the inside face. Reduce
the pressure on the return stroke. File all the teeth on
one side first, then turn the chain saw and file the teeth
on the other side.
• File all the teeth to the same length. When the length
of the cutting teeth is reduced to 5/32 inch (4 mm) the
chain is worn out and should be replaced.
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 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.
• The cutting teeth should be newly sharpened before
adjusting the depth gauge setting. We recommend
that you adjust the depth gauge setting every third
time you sharpen the cutting teeth. NOTE! This
recommendation assumes that the length of the
cutting teeth is not reduced excessively.
• You will need a flat file and a depth gauge tool. We
recommend that you use our depth gauge tool to
acheive the correct depth gauge setting and bevel for
the depth gauge.
• Place the depth gauge tool over the chain. Detailed
information regarding the use of the depth gauge tool,
will be found on the package for the depth gauge tool.
Use the flat file to file off the tip of the depth gauge that
protrudes through the depth gauge tool. The depth
gauge setting is correct when you no longer feel
resistance as you draw the file along the depth gauge
tool.
• Loosen the bar nut that holds the clutch cover and
chain brake. Use the combination spanner.
• Raise the tip of the bar and stretch the chain by
tightening the chain tensioning screw using the
combination spanner. Tighten the chain until it does
not sag from the underside of the bar.
• Use the combination spanner to tighten the bar 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.
14 – English
GENERAL SAFETY PRECAUTIONS
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 vegetable oil base. We
recommend the use of our own oil for both maximum
chain life and to minimise environmental damage. If our
own chain oil is not available, standard chain oil is
recommended.
Never use waste oil! Using waste oil can be dangerous
to you and damage the machine and environment.
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.
Checking chain lubrication
• Check the chain lubrication each time you refuel. See
instructions under the heading Lubricating the bar tip
sprocket.
Aim the tip of the bar at a light coloured surface about
20 cm (8 inches) away. After 1 minute running at 3/4
throttle you should see a distinct line of oil on the light
surface.
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 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 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.
• Check that the bar tip sprocket turns freely and that
the lubricating hole in the tip sprocket is not blocked.
Clean and lubricate if necessary.
If the chain lubrication system is still not working after
carrying out the above checks and associated measures
you should contact your servicing dealer.
English – 15
Chain drive sprocket
!
GENERAL SAFETY PRECAUTIONS
• Whether the groove in the bar has become badly
worn. Replace the bar if necessary.
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)
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:
• 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 (5/32 inch) the chain must be replaced.
Guide bar
Check regularly:
• Whether there are burrs on the edges of the bar.
Remove these with a file if necessary.
• Whether the tip of the bar is uneven or badly worn. If
a hollow forms on the underside of the bar tip this is
due to running with a slack chain.
• To prolong 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 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.
′′′′s safety equipment.
16 – English
ASSEMBLY
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.
Unscrew the bar nut and remove the clutch cover (chain
brake). Take off the transportation guard.
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.
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.
Note: If clutch cover is difficult to remove, replace bar nuts,
engage brake and rerelease (an audible click will be
heard if released properly).
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
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
correctly located in the groove in the bar. Tighten the bar
nuts finger tight.
English – 17
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.
• 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.
• The lowest recommended octane grade is 87
((RON+MON)/2). If you run the engine on a lower
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 referred to as outboard oil (rated
TCW).
• Never use oil intended for four-stroke engines.
Mixing ratio
1:50 (2%) for all engines.
Gasoline, litre Two-stroke oil, litre
2% (1:50)
5 0,10
10 0,20
15 0,30
20 0,40
US gallon US fl. oz.
1 2 1/2
2 1/2 6 1/2
5 12 7/8
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. Then add the entire amount of oil. Mix
(shake) the fuel mixture. Add the remaining amount of
gasoline.
• Mix (shake) the fuel mixture thoroughly before filling
the machine’s fuel tank.
• 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.
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
pump, the bar and the chain.
• It is important to use oil of the right grade (suitable
viscosity range) to suit the air temperature.
18 – English
FUEL HANDLING
!
• 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.
• 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 away from 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
evaporate.
2 If you have spilled 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.
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.
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.
• Secure the machine during transport.
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.
English – 19
STARTING AND STOPPING
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.
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.
Keep people and animals well away from
the working area.
Cold engine
Starting: The chain brake should be activated when
starting the chain saw. Activate the chain brake by
pushing the front hand guard forwards.
Warm engine
Use the same starting procedure as for a cold engine,
with the following exceptions:
• Slide the control to its rear position.
• Slide the control back to its middle position (working
position).
Starting
Grip the front handle with your left hand. Hold the chain
saw on the ground by placing your right foot through the
rear handle. 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. 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.
Ignition; choke: Slide the control to its rear position.
Primer bulb: Press the air purge repeatedly until fuel
begins to fill the bulb. The bulb need not be completely
filled.
20 – English
Push in the choke control as soon as the engine fires and
make repeated starting attempts. Immediately press and
release the throttle when the engine starts. That will
disengage the throttle latch.
IMPORTANT! As the chain brake is still activated the
engine must return to idling speed as soon as possible
by disengaging the throttel latch in order to avoid
unnecessery wear on the clutch assembly.
STARTING AND STOPPING
Note! Pull the front hand guard towards the front handle.
The chain brake is now disengaged. Your saw is 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.
• 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 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.
• Always hold the saw with both hands. The right hand
should be on the rear handle, and the left hand on the
front handle. All people, whether right or left handed,
should use this grip. Use a firm grip with thumbs and
fingers encircling the chain saw handles.
Stopping
The engine is stopped by pushing the stop switch to the
stop position.
• Never start the machine indoors. Exhaust fumes can
be dangerous if inhaled.
• Observe your surroundings and make sure that there
is no risk of people or animals coming into contact with
the cutting equipment.
English – 21
Before use:
1
2
4
WORKING TECHNIQUES
• To make sure that none of the above might come
within reach of your saw or be injured by falling trees.
3
6
1 Check that the chain brake works correctly and is not
damaged.
2 Check that the throttle lockout works correctly and is
not damaged.
3 CCheck that the stop switch works correctly and is not
damaged.
4 Check that all handles are free from oil.
5 Check that the anti vibration system works and is not
damaged.
6 Check that the muffler is securely attached and not
damaged.
7 Check that all parts of the chain saw are tightened
correctly and that they are not damaged or missing.
8 Check that the chain catcher is in place and not
damaged.
9 Check that the chain tension is correct.
8
General working instructions
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!
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.
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.
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.
3 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.
4 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.
5 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.
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
suddenly. Take great care when working on sloping
ground.
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”.
Basic safety rules
1 Look around you:
• To ensure that people, animals or other things cannot
affect your control of the machine.
22 – English
7 Take great care when cutting a tree that is under
tension. A tree that is under tension may spring back
to its normal position before or after being cut. If you
WORKING TECHNIQUES
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.
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.
WARNING! Sometimes chips get stuck in
the clutch cover causing the chain to
!
jam. Always stop the engine before
cleaning.
Lack of concentration can lead to kickback if the
kickback zone of the bar accidentally touches a
branch, nearby tree or some other object.
Have control over the workpiece. If the pieces you
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 avoid cutting with the tip of the bar. Never use
the chain saw one-handed!
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 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 minimizes the
effect of kickback and lets you keep the chain saw
under control.
Do not let go of the handles!
3 Most kickback accidents happen during limbing. Make
sure you are standing firmly and that there is nothing
in the way that might make you trip or lose your
balance.
5 Always use a fast cutting speed, i.e. full throttle.
6 If you have to cut branches or the like that are above
shoulder height, a working platform or scaffold tower
is recommended.
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 with a pushing chain. The
chain tries to push the chain saw back towards the
English – 23
WORKING TECHNIQUES
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
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 can lead to a kickback.
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.
Cutting with the bottom edge of the bar, i.e. from the
top of the object downwards, is known as cutting with
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
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.
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.
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.
The saw should only be attached to the recommended
attachment points on the harness. These may be at midpoint (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:
• not having a firm grip on the saw if it kicks back.
• 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)
• loosing control from insecure work position resulting
in contact with the saw (unexpected movement during
operation of the saw)
Securing the work position for two-handed use
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:
• hip level when cutting horizontal sections.
• solar plexus level when cutting vertical sections.
24 – English
WORKING TECHNIQUES
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.
Gaining a good footing at the working position can be
assisted by use of a temporary foot stirrup created from
an endless sling.
Starting the saw in the tree
When starting the saw in the tree, the operator should:
a) apply the chain brake before starting.
b) hold saw on either the left or right of the body when
starting:
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.
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.
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.
One-hand use of the chainsaw
Operators should never use a chain saw onehanded.
Operators should never:
• 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.
• check condition of harness, belt and ropes at regular
frequent intervals.
Freeing a trapped saw
If the saw should become trapped during cutting,
operators should:
• 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.
• pull the saw from the kerf whilst lifting the branch as
necessary.
• 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.
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.
Basic cutting technique
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 any load, i.e.
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.
Cutting with a pushing chain increases the risk of
kickback. See instructions under the heading How to
avoid kickback.
Terms
Cutting = General term for cutting through wood.
Limbing = Cutting branches off a felled tree.
Splitting = When the object you are cutting breaks off
before the cut is complete.
There are five important factors you should consider
before making a cut:
1 Make sure the cutting equipment will not jam in the
cut.
2 Make sure the object you are cutting will not split.
3 Make sure the chain will not strike the ground or any
other object during or after cutting.
4 Is there a risk of kickback?
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.
English – 25
WORKING TECHNIQUES
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 following instructions describe how to handle the
common 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.
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.
- If it is possible (can you turn the log?) stop cutting about
2/3 of the way through the log.
- 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.
Limbing
When limbing thick branches you should use the same
approach as for cutting.
Cut difficult branches piece by piece.
- Turn the log and finish the cut from the opposite side.
The log is supported at one end. There is a high risk
that it will split.
Start by cutting from below (about 1/3 of the way through).
26 – English
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