McCulloch 967027401 Owner’s Manual
EN Operator's manual 6-30
Please read the operator's manual carefully and make sure you understand the
instructions before using the machine.
FR Manuel d'utilisation Manual 31-58
Lire attentivement et bien assimiler le manuel d'utilisation avant d'utiliser la machine.
ES Manual de instrucciones 59-85
Lea detenidamente el manual de instrucciones y aseg_rese de entender su contenido
antes de utilizar la mAquina.
CS340
.A)
3 B
A
9 A
4
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1omi°4_m__
WARNING
The engine exhaust from this product
contains chemical known to the State
of California to cause cancer, bh'th
defects or other reproductive harm.
C D
A
(5 / 32")
154657-49 Rev.1 2012-03-15
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17
OFF HALF FULL
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1154657-49 Rev.1 2012-03-15 5
45
iNTRODUCTiON
Dear customer!
Thank you for choosing a McCulloch product.You are
thereby part of a story that started long ago, when the
McCulloch Corporation started its manufacturing of
engines during World War II. In 1949, when McCulloch
introduced its first light one-man chainsaw, woodworking
would never be the same again.
The line of innovative chainsaws would continue over the
decades, and business was expanded, first by airplane
and kart engines in the 1950s, then by mini chainsaws in
the 1960s. Later, in the 1970s and 80s, trimmers and
blower vacs were added to the range.
Today, as a part of the Husqvarna group, McCulloch
continues the tradition of powerful engines, technical
innovations, and strong designs that have been our
hallmarks for more than half a century. Lowering fuel
consumption, emissions and noise levels are of top
priority to us, as is improving safety and user-friendliness.
We certainly hope that you will be satisfied with your
McCulloch product, as it is designed to be your
companion for a long time. By following this operators
manual's advice on usage, service, and maintenance, its
lifespan can be extended. If you should need professional
help with repair or service, please use the Service Locator
at www.mcculloch.com.
McCulloch has a policy of continuous product
development and therefore reserves the right to modify
the design and appearance of products without prior
notice.
This manual can also be downloaded at
www.mcculloch.com.
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
£3
Contact of the guide bar tip with any
object must be avoided.
@
WARNING! Tip contact may cause the
guide bar to move suddenly upward and
backward (so-called kickback), which
may cause serious injury.
The engine is stopped by switching the
ignition off using the stop switch.
V
Air purge.
Refuelling.
Chain oil fill.
Other symbols/decals on the machine refer to special
certification requirements for certain markets.
You will find the following labels on your chain saw:
EMBSIONCONTROL INFORMATION"l141SENGINEMEETSUSEPAANDCALIFORNIA
EX_EWREGSFOR SORE.REFERTOOPE_TORS_NU_FOR
_NTENANCESPECnOATIONSANOAOJUS_ENTS'II 21141I_118114
EMISSIONCOMPUANCEPERIOD: T_ A_ I_JEXOFTH_SE_I_E_S
The Emissions Compliance Period referred to on the
Emission Compliance label indicates the number of
operating hours for which the engine has been shown to
meet Federal emissions requirements.
Maintenance, replacement, or repair of the emission
control devices and system may be performed by any
nonroad engine repair establishment or individual.
6
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.
6 - English 1154657-49 Rev.1 2012-03-15
CONTENTS
What is what on the chain saw?
(1)
1 Cylinder cover
2 Air purge
3 Stop switch (Ignition on/off switch.)
4 Choke control/Start throttle lock
5 Rear handle with right hand guard
6 Information and warning decal
7 Fuel tank
8 Adjuster screws carburetor
9 Starter handle
10 Starter
11 Chain oil tank
12 Product and serial number plate
13 Chain tensioning screw
14 Throttle lockout (Prevents accidental operation of
throttle trigger.)
15 Front handle
16 Front hand guard
17 Muffler
18 Guide bar
19 Bar tip sprocket
20 Saw chain
21 Bumper spike (Available as an accessory.)
22 Chain catcher
23 Clutch cover
24 Integrated combi-tool
25 Throttle trigger
26 Guide bar cover
27 Operator's manual
28 Combi-tool
Contents
iNTRODUCTiON
Dear customed ..................................................... 6
Symbols on the machine: ..................................... 6
What is what on the chain saw? ........................... 7
CONTENTS
Contents ............................................................... 7
GENERAL SAFETY PRECAUTIONS
Before using a new chain saw .............................. 8
Important .............................................................. 9
Always use common sense .................................. 9
Personal protective equipment ............................. 9
Machine's safety equipment ................................. 9
Cutting equipment ................................................ 11
ASSEMBLY
Fitting the bar and chain ....................................... 15
FUEL HANDLING
Fuel ....................................................................... 16
Fueling .................................................................. 16
Fuel safety ............................................................ 17
STARTING AND STOPPING
Starting and stopping ........................................... 18
WORKING TECHNIQUES
Before use: ............................................................ 19
General working instructions ................................ 19
How to avoid kickback .......................................... 22
MAINTENANCE
General ................................................................. 23
Carburetor adjustment .......................................... 23
Checking, maintaining and servicing chain saw
safety equipment .................................................. 23
Muffler ................................................................... 24
Air filter ................................................................. 24
Spark plug ............................................................ 24
"CCS" centrifugal cleaning .................................... 24
Maintenance schedule .......................................... 25
TECHNICAL DATA
Technical data ....................................................... 26
Guide bar and saw chain combinations ................ 27
Saw chain filing and file gauges ........................... 27
FEDERAL EMISSION CONTROL WARRANTY
STATEMENT
YOUR WARRANTY RIGHTS AND OBLIGATIONS 28
AMERICAN STANDARD SAFETY
PRECAUTIONS
Safety precautions for chain saw users ................ 30
1154657-49 Rev.1 2012-03-15 English - 7
GENERAL SAFETY PRECAUTIONS
Before using a new chain saw
Please read this manual carefully.
(1) - (45) refer to figures on p. 2-5.
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.
the design of the machine be modified
without the permlesion 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 er others.Your
warranty may nat cover damage or
liability cause d by the use of non-
authorized accessories or replacement
parts.
For Canada:
TKeep hand,esdryl€,ea,,nd----7
I_T'_ poisonin_t.hechainsawinwell !
ventilated areas only.
|"Z3_XI'mb'ng°perati°n'nastandingtree=
unl_caily trained to do so.
tool if used carelessly or incorrectly and |
can cause serious, even fatal injuries. !t |
is very important that you read and |
understand the contents of this |
operator's manual.
ths m0.,or---i
contain chemicale that may be |
carcinogenic. Avoid contact with these |
elements in the event of a damaged |
muffler.
A_ WARN_Na!L_
engine'sexh_s,_i, oilmist |
and dust from sawdust can represent a |
electromagnetic field during 0perati0 m
Th s f e d 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.
8 - English 1154657-49 Rev.1 2012-03-15
GENERAL SAFETY PRECAUTIONS
important
IMPORTANT!
This chain saw for forest service is designed for forest
work such as felling, limbing and cutting.
You should only use the saw with the bar and chain
combinations we recommend in the chapter Technical
data.
Never use the machine if you are fatigued, while under
the influence of alcohol or drugs, medication or anything
that could affect your vision, alertness, coordination or
judgement.
Wear personal protective equipment. See instructions
under the heading "Personal protective equipment".
Do not modify this product or use it if it appears to have
been modified by others.
Never use a machine that is faulty. Carry out the checks,
maintenance and service instructions described in this
manual. Some maintenance and service measures
must be carried out by trained and qualified specialists.
See instructions under the heading Maintenance.
When not in use, always store the integrated combi-tool
in the tool-holder. Do not use the tool-holder for other
purposes than to hold the supplied combi-tool, since the
tool-holder is exclusively designed for this purpose.
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.
_ng an engine in a
| _" _entilate-d area can
| _ res_ asphyxiation or
carbon monoxide poisoning.
WARNINa_FaultycuttingequipmentOr
J _ _, 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,
Always use common sense (2)
It is not possible to cover every conceivable situation you
can face when using a chain saw. Always exercise care
and use your common sense. Avoid all situations which
you consider to be beyond your capability. If you still feel
uncertain about operating procedures after reading these
instructions, you should consult an expert before
continuing. Do not hesitate to contact your dealer or us if
you have any questions about the use of the chain saw.
We will willingly be of service and provide you with advice
as well as help you to use your chain saw both efficiently
and safely. Attend a training course in chain saw usage if
possible.Your dealer, forestry school or your library can
provide information about which training materials and
courses are available. Work is constantly in progress to
improve the design and technology - improvements that
increase your safety and efficiency. Visit your dealer
regularly to see whether you can benefit from new
features that have been introduced.
Personal protective equipment
A WARNINGt Most chain Saw accidents
happen when the chain touches the
operator, You must use approved
personal protective equipment whenever
you use the machine. Personal protective
equipment cannot eliminate the risk of
injury but it will reduce the degree of
injury if an accident does happen, Ask
your dealer for help in choosing the right
equipment,
Approved protective helmet
Hearing protection
Protective goggles or a visor
Gloves with saw protection
Trousers with saw protection
Boots with saw protection, steel toe-cap and non-slip
sole
Always have a first aid kit nearby.
Fire Extinguisher and Shovel
Generally clothes should be close-fitting without
restricting your freedom of movement.
IMPORTANT! Sparks can come from the muffler, the bar
| and chain or other sources. Always have fire
| extinguishing tools available if you should need them.
Help prevent forest fires.
Machine's safety equipment
In this section the machine's safety features and their
function are explained. For inspection and maintenance
see instructions under the heading Checking, maintaining
and servicing chain saw safety equipment. See
instructions under the heading, What is what?, to find
where these parts are located on your machine.
The life span of the machine can be reduced and the risk
of accidents can increase if machine maintenance is not
carried out correctly and if service and/or repairs are not
carried out professionally. If you need further information
please contact your nearest servicing dealer.
1154657-49 Rev.1 2012-03-15 English - 9
GENERAL SAFETY PRECAUTIONS
_achine with
defectorseafety,'OmponentslSsfoty
equipment must be inspected and
maintained, See instructions under the
heading Checking, maintaining and
servicing chain saw safety equipment, ff
your machine does not pass all the
checks, take the saw to a servicing
dealer for repair.
Chain brake and front hand guard
Your chain saw is equipped with a chain brake that is
designed to stop the chain if you get a kickback.The chain
brake reduces the risk of accidents, but only you can
prevent them.
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. (3)
The brake is applied when the front hand guard (B) is
pushed forwards. (3)
This movement activates a spring-loaded mechanism
that tightens the brake band (C) around the engine
drive system (D) (clutch drum). (4)
The front hand guard is not designed solely to activate
the chain brake. Another important feature is that it
reduces the risk of your left hand hitting the chain if
you lose grip of the front handle.
The chain brake must be engaged when the chain
saw is started to prevent the saw chain from rotating.
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
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. (8)
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.
Will my inertia activated chain brake
always activate during kickback in the
event of a kickback?
No. First your brake must be in working order.Testing the
brake is simple, see instructions under the heading
Checking, maintaining and servicing chain saw safety
equipment.We recommend you do before you begin each
work session. Second the kickback must be strong
enough to activate the chain brake. If the chain brake is
too sensitive it would activate all the time which would be
a nuisance.
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.
(5)
10 - English 1154657-49 Rev.1 2012-03-15
GENERAL SAFETY PRECAUTIONS
Chain catcher
The chain catcher is designed to catch the chain if itsnaps
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.
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.
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.
A 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, leSS of strength, changes
in skin co!our 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. (28)
Muffler
The muffler is designed to reduce noise levels and to
direct exhaust fumes away from the user.
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 substantiamly
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. A damaged or badly
sharpened chain increases the risk of accidents.
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.
_aust fumes from the
| _ which can start a fire. Never start the
=| mawr 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
(A). (7)
1154657-49 Rev.1 2012-03-15 English - 11
GENERAL SAFETY PRECAUTIONS
Cutting equipment designed to reduce
kickback
| _utting.equiPment or
I ofbarandsaw |
| _ _ risk of kickback! . |
| Only usethe bar/saw chain combinations |
| we re_nd follow the fih'ng |
| _tructions underthe |
The only way to avoid kickback is to make sure that the
kickback zone of the bar never touches anything.
By using cutting equipment with "built-in" kickback
reduction and keeping the chain sharp and well-
maintained you can reduce the effects of kickback.
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.
I_ign eliminates the
_========_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
Husqvama. See instructions under the heading Technical
Data for a list of replacement bar and chain combinations
we recommend.
Guide bar
Saw chain
12 - English 1154657-49 Rev.1 2012-03-15
heading Technical data.
Length (inches/crn)
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.
Chain oil hole and hole for chain tensioner.The bar
must be matched to the chain saw design.
Chain pitch (inches)
Drive link width (mm/inches)
Number of drive links.
Sharpening your chain and adjusting
depth gauge setting
_A!ways wea r g!o_
| f _ _. working with the chain, in orde r to !
protect your hands from injury.
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 (C)). (9)
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
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.
_ sharpening instructions considerably |
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.
File all the teeth to the same length. When the length of
the cutting teeth is reduced to 5/32 inch (4 ram) the chain
is worn out and should he replaced. (10)
increas_e risker kickback. "
Switch the engine off. (28)
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.
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.
kbac.,e 7
ge setting is |
too larger
Adjustment of depth gauge setting
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.
Tensioning the chain
_ain may jump off i
l/'k !
=,,,,,,,,,,,,,,,,,_injury.
WARNING! Amways wear approved
protective gloveel Even a non,moving
cha n can cause ser ous cuts to yourse f
or persons you bump into with an
exposed chain,
The more you use a chain the longer it becomes. It is
therefore important to adjust the chain regularly to take up
the slack.
Check the chain tension every time you refuel. NOTE! A
new chain has a running-in period during which you
should check the tension more frequently.
Tension the chain as tightly as possible, but not so tight
that you cannot pull it round freely by hand. (13)
Switch the engine off. (28)
Undo the bar nuts that hold the clutch cover/chain
brake. Use the combi-tool integrated in the rear
handguard or one with corresponding dimensions
(contact your servicing dealer (retailer) for a
replacement tool).Then tighten the barnuts by hand
as tight as you can. (6) (t t)
Raise the tip of the bar and stretch the chain by
tightening the chain tensioning screw using the combi-
tool. Tighten the chain until it does not sag from the
underside of the bar. (12)
Use the combi-tool to tighten the bar nuts while lifting
the tip of the bar at the same time. Check that you can
pull the chain round freely by hand and that it does not
sag from the underside of the bar. (13)
Lubricating cutting equipment
'_ WARNING! PoOr lubrication of cutting
equipment may cause the chain to snap |
which could lead to seriousl 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.
Never use waste oil! Using waste oil can be dangerous
to you and damage the machine and environment.
I 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
ch_p 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.
The saw chain oil tank and the fuel tank are designed
so that the fuel runs out before the saw chain oil.
However, this safety feature requires that you use the
right sort of chain oil (if the oil is too thin it will run out
before the fuel), and that you adjust the carburetor as
recommended (a lean mixture may mean that the fuel
lasts longer than the oil) and that you also use the
recommended cutting equipment (a bar that is too
long will use more chain oil).
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.
1154657-49 Rev.1 2012-03-15 English - 13
GENERAL SAFETY PRECAUTIONS
Check that the groove in the edge of the bar is clean.
Clean if necessary.
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.
Chain drive sprocket
The clutch drum is fitted with a Spur sprocket (the chain
sprocket is welded on the drum (D)). (4)
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 5/32 inch (4 mm) the chain must be replaced. (10)
Guide bar
Check regularly:
Whether there are burrs on the edges of the bar (A).
Remove these with a file if necessary. (14)
Whether the groove inthe bar has become badly worn
(B). Replace the bar if necessary. (14)
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.
A 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's safety equipment.
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.
-- a
14 - English 1154657-49 Rev.1 2012-03-15
ASSEMBLY
Fitting the bar and chain
A WARNING! Switch off the engine before
carrying out any checks or maintenance.
The stop switch automatically returns to
the start position, in order to prevent
unintentional starting, the spark plug cap
must be removed from the spark plug
when assembling, checking and/or
performing maintenance.
Always wear gloves, when working with
the chain, in order to protect your hands
from injury.
Check that the chain brake is in disengaged position by
moving the front hand guard towards the front handle.
(24)
Undo the bar nuts that hold the clutch cover/chain brake.
Use the combi-tool integrated in the rear handguard or
one with corresponding dimensions (contact your
servicing dealer (retailer) for a replacement tool). Take off
the transportation ring (A). (6) (15)
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. (16)
Fit the clutch cover (chain brake) and locate the chain
adjuster pin in the cut-out in the bar. Check that the drive
links of the chain fit correctly on the drive sprocket and
that the chain is in the groove on the bar.Tighten the bar
nut finger-tight. (t6)
Tension the chain by turning the chain tensioning screw
clockwise using the combi-tooI.The chain should be
tensioned until it does not sag from the underside of the
bar. (12)
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
combi-tool. (13)
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.
1154657-49 Rev.1 2012-03-15 English - 15
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.
Gasoline
Use good quality unleaded gasoline.
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.
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 synthetic two-
stroke engine oil, which is specially formulated for air-
cooled two-stroke engines.
Never use two-stroke oil intended for water-cooled
engines, sometimes referred to as outboard oil (rated
TOW).
Never use oil intended for four-stroke engines.
Mixing ratio
50:1 (2%) for all engines.
Gasoline, litre Two-stroke oil, litre
2% (50:1)
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.
In temperatures below 32°F (0°C) 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
precautions, will lessen the risk of fire:
WARNING! Taking the following
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 and source 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.
16 - English 1154657-49 Rev.1 2012-03-15
FUEL HANDLING
flammable.Take care when handling fuel
and cha n o .Be aware of the r sks 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 (gasoline and 2-stroke oil).
Move the machine at least 10 ft (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.
| _ _ble. A risk of sparking
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 gas station.
Ensure the machine is cleaned and that a complete
service is carried out before long-term storage.
The guide bar cover 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 guide bar
cover. Clean the machine. See instructions under the
heading Maintenance schedule.
1154657-49 Rev.1 2012-03-15 English - 17
STARTING AND STOPPING
Starting and stopping
WARNING! Note the following beforestarting:
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 thai
the chain cannot touch anything.
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. (26)
Air purge: Press the air purge repeatedly until fuel begins
to fill the bulb. The bulb need not be completely filled. (20)
Choke: Pull the blue choke/fast idle lever out to the full
extent (to the FULL CHOKE position). When the choke/
fast idle lever is pulled out to the full extent, the correct
throttle setting is set automatically. (18)
Start throttle: The correct choke/start throttle setting is
obtained by moving the control to the choke position. (19)
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. (22)
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 starts. Never wrap the starter cord around your
hand
CAUTmON! 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.
Push in the choke control to the "HALF choke" setting as
soon as the engine fires which can be heard through a
•puff sound. (18)
Keep on pulling the cord powerfully until the engine starts.
As the chain brake is still engaged the speed of the engine
must be set to idling as soon as possible, this is achieved
by quickly pressing the throttle trigger once. This prevents
unnecessary wear to the clutch, clutch drum and brake
band. (23)
Note! Reactivate the chain brake by pulling the front hand
guard back (marked "PULL BACK TO RESET") towards
the front handle.The chain saw is now ready for use. (24)
There is a simplified start reminder with illustrations
to describe each step on the rear edge of the saw.
Warm engine
Use the same procedure as for starting a cold engine but
without setting the choke control in the choke position. Set
the throttle to the start position by pulling out the blue
choke control to the choke position and then pushing it in
again. (21)
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. (25)
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. (26)
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.
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. (27)
Stopping
Stop the engine by pressing down the stop button. (28)
18 - English 1154657-49 Rev.1 2012-03-15
WORKING TECHNIQUES
Before use: (29)
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 Check 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 they are not damaged or missing.
9 Check that the chain catcher is in place and not
damaged.
10 Check the chain tension.
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 are not sure you can handle!
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.
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.
To make sure that none of the above might come
within reach of your saw or be injured by falling trees.
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 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.
3 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.
4 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.
5 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
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 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.
7 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.
ochip°gets, uok!°'----]
J _ _ the ClUtCh cover causing the chain t0 |
jam, Always stop the engine before |
cleaning.
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 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! (27)
3 Most kickback accidents happen during limbing. Make
sure you are standing firmly and that there is nothing
in the way that might make you trip or lose your
balance.
Lack of concentration can lead to kickback if the
kickback zone of the bar accidentally touches a
branch, nearby tree or some other object.
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.This is not
necessarily dangerous in itself, but you may be
surprised and lose control of the saw. Never saw
1154657-49 Rev.1 2012-03-15 English - 19
WORKING TECHNIQUES
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! (30)
5 In order to keep control of your saw, always maintain
a firm foothold. Never work on a ladder, in a tree or on
any other insecure support. (31)
6 Always use a fast cutting speed, i.e. full throttle.
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
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. (32)
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.
Basic cutting technique
"ovor
| _ not safely controlled with one hand, |
| Always have a secure, firm grip around |
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 pushing chain.
Cutting with a pushing chain increases the risk of
kickback. See instructions under the heading How to
avoid kickback.
g it with one hand. A chain saw is |
the handles with both hands.
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.
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.
IMPORTANT! If the chain jams in the cut: stop the
engine! Don't try to pull the chain saw free. Ifyou 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.
Limbing
When limbing thick branches you snouia use the same
aeeroacn as for cueing.
Cut difficult urancnes piece by piece.
Cutting
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 risk for
inadvertently getting a kickback, as well as increasing the
risk of losing your balance while working.
20 - English 1154657-49 Rev.1 2012-03-15
WORKING TECHNIQUES
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. (33)
If it is possible (can you turn the log?) stop cutting about
2/3 of the way through the log.
Turn the log and finish the cut from the opposite side.
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).
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
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. (39)
Felling direction
The aim is to fell the tree in a position where you can limb
and cross-cut the log as easily as possible.You want it to
fall in a location where you can stand and move about
safely.
Once you have decided which way you want the tree to fall
you must judge which way the tree would fall naturally.
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, power lines, roads and buildings.
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.
You may find you are forced to let the tree fall in its natural
direction because it is impossible or dangerous to try to
make it fall in the direction you first intended.
Another very important factor, which does not affect the
felling direction but does affect your safety, is to make sure
1154657-49 Rev.1 2012-03-15
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
tree. It is very dangerous to remove a trapped tree and
there is high accident risk. See instructions under the
heading Freeing a tree that has fallen badly.
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 for obstacles (stones, branches, holes,
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. (40)
Felling
Fellingisdone using threecuts.Firstyou make the
directionalcuts,which consistofthe topcut and the
bottom cut,thenyou finishwiththe fellingcut.By placing
thesecutscorrectlyyou can controlthefellingdirection
very accurately.
Directional cuts
To make the directional cuts you begin with the top cut.
Stand to the right of the tree and cut on the pull stroke.
Next make the bottom cut so that it finishes exactly at the
end of the top cut. (41)
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 °) to the chosen felling direction. (42)
Fellingcut
The fellingcutismade from theoppositeside ofthe tree
and itmust be perfectlyhorizontal.Stand on the leftside
ofthetreeand cut on the pullstroke.
Make thefellingcutabout 1.5-2inches(3-5cm) above the
bottom directionalcut.
Finishthefellingcutparallelwiththedirectionalcutlineso
thatthedistancebetween them isat leastI110ofthe
trunkdiameter.Theuncutsectionofthetrunkiscalledthe
fellinghinge.
The fellinghingecontrolsthedirectionthatthe treefailsin.
(44)
English - 21
WORKING TECHNIQUES
All control over the felling direction is lost if the felling
hinge is too narrow or non-existent, or if the directional
cuts and felling cut are badly placed.
When the felling cut and directional cut are complete the
tree should start to fall by itself or with the aid of a felling
wedge or breaking bar.
We recommend that you use a bar that is longer than the
diameter of the tree, so that you can make the felling cut
and directional cuts with single cutting strokes. See
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. However these methods involve a
much greater risk that the kickback zone of the bar will
come into contact with the tree.
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
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 you are able to do it safely. In complicated
situations the only safe method is to put aside your chain
saw and use a winch.
General advice:
Position yourself so that you will be clear of the tree or
branch when the tension is released.
Make one or more cuts at or near the point of maximum
tension. Make as many cuts of sufficient depth as
necessary to reduce the tension and make the tree or
branch break at the point of maximum tension.
Never cut straight through a tree or branch that is in
tension!
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.
Cut tree/limb from outside the bend, after tension has
been released.
How to avoid kickback
WARNING! Kickback can happen very
suddenly and violently; kicking the chain
saw, bar and chain back at the user. if
this happens when the chain is moving it
can cause very serious, even fatal
injuries, it is vital you understand what
causes kickback and that you can avoid
it by taking care and using the right
working technique.
What is kickback?
The word kickback is used to describe the sudden
reaction that causes the chain saw and bar to jump off an
object when the upper quadrant of the tip of the bar,
known as the kickback zone, touches an object. (32)
Kickback always occurs in the cutting plane of the bar.
Normally the chain saw and bar are thrown backwards
and upwards towards the user. However, the chain saw
may move in a different direction depending on the way it
was being used when the kickback zone of the bar
touched the object.
Kickback only occurs if the kickback zone of the bar
touches an object. (45)
Limbing
A WARNING! A majority of kickback
accidents occur during limbing. Do not
use the kickback zone of the guide bar.
Be extremely Cautious and avoid
contacting the log other limbs or objects
with the nose of the guide bar. Be
extreme!y cautious of limbs under
tension,They can spring back toward
you and cause !oss of control resulting
in injury.
Make sure that you can stand and move about safely.
Work on the left side of the trunk. Work as close as
possible to the chain saw for maximum control. If possible,
let the weight of the chain saw rest on the trunk.
Keep the trunk between you and the chain saw as you
move along the trunk.
Cutting the trunk into logs
See instructions under the heading Basic cutting
technique.
22 - English 1154657-49 Rev.1 2012-03-15
MAINTENANCE
General
The user must only carry out the maintenance and
service work described in this manual. More extensive
work must be carried out by an authorized service
workshop.
Carburetor adjustment
Your McCulloch product has been designed and
manufactured to specifications that reduce harmful
emissions.
Function
The carburetor governs the engine's speed via the
throttle control. Air and fuel are mixed in the
carburetor. The air/fuel mixture is adjustable. Correct
adjustment is essential to get the best performance
from the machine.
The T-screw regulates the throttle setting at idle
speed. If the T-screw is turned clockwise this gives a
higher idle speed; turning it anti-clockwise gives a
lower idle speed.
Basic settings and running in
The basic carburetor settings are adjusted during testing
at the factory. Fine adjustment should be carried out by a
skilled technician.
Rec. idle speed: See the Technical data section.
Fine adjustment of the idling speed T
Adjust the idle speed with the T-screw. If it is necessary to
re-adjust, turn the T-screw clockwise while the engine is
running, until the chain starts to rotate.Then turn counter-
clockwise until the chain stops. A correctly adjusted idle
speed setting occurs when the engine runs smoothly in
every position. It should also be good margin to the rpm
when the chain starts to rotate.
cty0u rse icing
| _ adjusted so that the chain stops at idle.
| Do not use the chain saw until it ha s
been properly adjusted or repaired.
peed setting cannot be
Checking, maintaining and
servicing chain saw safety
equipment
Note! All servicing and repair work on the machine
requires special training. This is especially true of the
machine's safety equipment. If your machine fails any of
the checks described below we recommend you to
contact our servicing dealer. Any maintenance other
than that described in this manual must be carried out
by your servicing dealer (retailer).
Switch off the engine and take off the ignition cable
before repairs or maintenance
Chain brake and front hand guard
Checking brake band wear
Brush off any wood dust, resin and dirt from the chain
brake and clutch drum. Dirt and wear can impair operation
of the brake. (34)
Regularly check that the brake band is at least 0.024 inch
(0,6 mm) thick at its thinnest point.
Checking the front hand guard
Make sure the front hand guard is not damaged and that
there are no visible defects such as cracks.
Move the front hand guard forwards and back to make
sure it moves freely and that it is securely anchored to the
clutch cover. (35)
Checking the inertia brake release
With the engine turned off, hold the chain saw over a
stump or other firm object. Let go of the front handle so
that the bar drops towards the stump as the chain saw
rotates around the rear handle.
When the bar hits the stump the brake should be
activated. (37)
Checking the brake trigger
Place the chain saw on firm ground and start it. Make sure
the chain does not touch the ground or any other object.
See the instructions under the heading Start and stop.
Grasp the chain saw firmly, wrapping your fingers and
thumbs around the handles.
Apply full throttle and activate the chain brake by tilting
your left wrist forward onto the front hand guard. Do not let
go of the front handle. The chain should stop
immediately.
Throttle lockout
Make sure the throttle control is locked at the idle
setting when the throttle lockout is released.
Press the throttle lockout and make sure it returns to
its original position when you release it.
Check that the throttle trigger and throttle lockout
move freely and that the return springs work properly.
1154657-49 Rev.1 2012-03-15 English - 23
MAINTENANCE
Start the chain saw and apply full throttle. Release the
throttle control and check that the chain stops and
remains stationary. If the chain rotates when the
throttle control is in the idle position you should check
the carburetor idle adjustment.
Chain catcher
Check that the chain catcher is not damaged and is firmly
attached to the body of the chain saw.
Right hand guard
Check that the right hand guard is not damaged and that
there are no visible defects, such as cracks.
Vibration damping system
Regularly check the vibration damping units for cracks or
deformation.
Make sure the vibration damping units are securely
attached to the engine unit and handle unit.
Spark plug
The spark plug condition is influenced by:
Incorrect carburetor adjustment.
An incorrect fuel mixture (too much or incorrect type of
oil).
A dirty air filter.
These factors cause deposits on the spark plug
electrodes, which may result in operating problems and
starting difficulties. (38)
If the machine is low on power, difficult to start or runs
poorly at idle speed: always check the spark plug first
before taking any further action. If the spark plug is dirty,
clean it and check that the electrode gap is 0.020 inch (0,5
mm).The spark plug should be replaced after about a
month in operation or earlier if necessary.
Note! Always use the recommended spark plug type! Use
of the wrong spark plug can damage the piston/cylinder.
Check that the spark plug is fitted with a suppressor.
Stop switch
Start the engine and make sure the engine stops when
you move the stop switch to the stop setting. (28)
Muffler
Never use a machine that has a faulty muffler. Regularly
check that the muffler is securely attached to the machine.
Note: The spark arrestor screen (A) on this machine is
serviceable.The screen must be replaced if it is
damaged. If the screen is blocked the machine will
overheat and this will cause damage to the cylinder and
)iston. Never use a machine with a muffler that is in poor
condition. Never use a muffler if the spark arrestor
screen is missing or defective. (7)
After 75 hours of use, we recommend that your muffler be
replaced by your servicing dealer (retailer).
"COS" centrifugal cleaning
Centrifugal cleaning means the following: All air to the
carburetor passes through the starter. Dirt and dust is
pushed out by the cooling fan.
IMPORTANT! In order to maintain operation of the
centrifugal cleaning system it must be regularly
maintained. Clean the air intake to the starter, the fins on
the flywheel, the space around the flywheel, inlet pipe and
carburetor compartment.
Air filter
The air filter must be regularly cleaned to remove dust and
dirt in order to avoid:
Carburettor malfunctions
Starting problems
Loss of engine power
Unnecessary wear to engine parts
Excessive fuel consumption.
Remove the air filter (3) after taking off the cylinder
cover, screw (1) and filter cover (2). When refitting
make sure that the air filter seals tightly against the
filter holder. Clean the filter by brushing or shaking it.
(36)
The filter can be cleaned more thoroughly by washing it in
water and detergent.
An air filter that has been in use for a long time cannot be
cleaned completely. The filter must therefore be replaced
with a new one at regular intervals. A damaged air filter
must always be replaced.
24 - English 1154657-49 Rev.1 2012-03-15
MAINTENANCE
Maintenance schedule
The following is a list of the maintenance that must be performed on the machine. Most of the items are described in the
Maintenance section.
Daily maintenance Weekly maintenance Monthly maintenance
Clean the outside of the machine.
Check that the components of the Check that the vibration damping Check the clutch centre, clutch drum
throttle control work safely. (Throttle
lockout and throttle control.) elements are not damaged, and clutch spring for wear.
Clean the chain brake and check that
itoperates safely. Make sure that the File off any burrs from the edges of Clean the spark plug. Check that the
chain catcher is undamaged, and the bar. electrode gap is 0.020 inch (0,5 mm).
replace it if necessary.
The bar should be turned daily for
more even wear. Check the
lubrication hole in the bar, to be sure Clean the carburetor compartment. Clean the outside of the carburetor.
it is not clogged. Clean the bar
groove.
Check that the bar and chain are Clean the air filter. Replace if Check fuel hose for cracks or other
getting sufficient oil. necessary, damage. Change if necessary.
Check the saw chain with regard to
visible cracks in the rivets and links,
whether the saw chain is stiff or Empty the fuel tank and clean the
whether the rivets and links are inside.
abnormally worn. Replace if
necessary.
Sharpen the chain and check its
tension and condition. Check the Empty the oil tank and clean the
drive sprocket for excessive wear inside.
and replace if necessary.
Clean the starter units air intake. Check all cables and connections.
Check that nuts and screws are tight.
Check that the stop switch works
correctly.
Check that there are no fuel leaks
from the engine, tank or fuel lines.
Check the starter, the starter cord brake for wear. Replace when less
and the recoil spring, than 0.024 inch (0.6 mm) remains at
Check the brake band on the chain
the most worn point.
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TECHNICAL DATA
Technical data
CS 340
Motor
Cylinder displacement, cu.in/cm 3 2.3/38
Stroke, inch/mm 1.28/32
Idle speed, rpm 3000
Power, KW/hp @ rpm 1.3/1.7 @ 9000
Ignition system
Spark plug Champion RCJ 7Y
Electrode gap, inch/mm 0.02/0,5
Fuel and lubrication system
Fuel tank capacity, US pint/litre 0.53/0,25
Oil pump capacity at 8,500 rpm, ml/min 7
Oil tank capacity, US pint/litre 0.43/0,20
Type of oil pump Automatic
Weight
Chain saw without bar or chain, empty tanks, Ib/kg 11.4/5,2
Chain/bar
Standard bar length, inch/cm 18/40
Recommended bar lengths, inch/cm 14/35, 18/40, 18/45
Usable cutting length, inches/cm 13/33, 15/38, 17/43
Chain speed at max. power, m/sec 20
Pitch, inch/ram 3/8"/9,52
Thickness of drive links, inch/mm 0.050/1,3
Drive sprocket type/teeth Spur/6
26 - English 1154657-49 Rev.1 2012-03-15
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