Petrol Chainsaw 9082
Instructions
WARNING Before using our product please
read carefully to understand the proper use of your unit.
2
Contents
Parts location 3
Specifications 3
Symbols on the machine 4
Warning 5 - 7
For safe operation 8 - 9
Installing guide bar and saw chain 10 - 11
Fuel and chain oil 12
Operation 13 - 17
Sawing 18 - 21
Maintenance 22 - 24
Maintenance of saw chain and guide bar 25 - 26
Troubleshooting guide 27
Storage 28
Packaging Disposal 28
EC Declaration of Conformity 28
Warning
This mark indicates instructions which must be
followed in order to prevent accidents which could lead
to serious bodily injury or death.
Important
This mark indicates instructions which must be
followed, or it leads to mechanical failure, breakdown,
or damage.
Note
This mark indicates hints or directions useful in
the use of the product.
!
!
SAFETY
FIRST
Instructions contained in
warnings within these
instructions marked with a
symbol concern critical
points which must be
taken into consideration to
prevent possible serious
bodily injury, and for this
reason you are requested
to read all such
instructions carefully and
follow them without fail.
!
!
WARNING SYMBOLS
3
Specifications are subject to change without notice.
Parts location
Front guard
Guide bar
Saw chain
Air cleaner cover
Starter rope
Oil tank
Choke knob
Left handle
Engine switch
Throttle lever
Fuel tank
Throttle trigger
Throttle interlock
Right handle
Specifications
Power unit
Displacement: 45cm
3
Usable cutting length: 440mm (18in)
Fuel: Mixture Petrol 25 : 2-cycle oil 1 Max. chain speed
(at 1.33 x max. engine power) 21.2m/s
Fuel tank capacity: 550ml
Chain oil: Motor oil SAE 10W-30
Oil tank capacity: 260ml
Carburetor: Diaphragm type Engine idling speed 3000
+
200 min-1
Ignition system: Pointless CDI
Power: 1.7/7,500 kw/min
-1
Sound pressure level ISO 22868 LPA: 108dB(A)
Max speed: 2,800min
-1
Sound pressure level ISO 22868 LWA< 116dB(A)
Dimensions: L400 xW250 xH270mm Vibration tool value ISO 22867: <15m/s
2
Dry Weight: Power unit only 6.4kg
Cutting attachment
Guide bar: Type: Sprocket nose 16(40) Size: 18in (45cm) Gauge: 0.050in (1.27mm)
Saw Chain: Type: Oregon Pitch: .325in (8.26mm) Sprocket teeth: 7
Tensioner
nut
4
Symbols on the machine
For safe operation and maintenance, symbols are carved in relief on the machine.
According to these indications, please be careful not to make any mistake.
!
(a) The port to refuel Petrol/2-Stroke Oil mix using
mixing container.
Position: Fuel cap, bottom of the power unit.
(b) The port to top up chain oil.
Position: Oil cap.
(c) Setting the switch to the “O” position, the engine
stops immediately.
Position: Rear-left of the unit.
(d) Starting the engine. If you pull out the choke knob
(at the back-right of the rear handle) to the point of the
arrow, you can set the starting mode as follows: First-
stage position – starting mode when the engine is
warm. Second-stage position – starting mode when the
engine is cold.
Position: Upper-right of the air cleaner cover.
(e) The screw under the H stamp is the high-speed
adjustment screw.
The screw under the L stamp is the slow-speed
adjustment screw.
The screw at the left of the T stamp is the Idle
adjustment screw.
Position: to the right of the starter rope.
(f) Shows the directions that the chain brake is released
(white arrow) and activated (black arrow).
Position: Front of the chain cover.
g) Use a screwdriver to turn the screw to increase or
decrease the flow of oil to the chain.
Position: Bottom of the power unit.
CHOKE
START
RUN
(a)
(b)
(c)
(d)
(e)
(f)
(g)
5
• Chainsaws are potentially dangerous tools.
Professional training is recommended before first
use.
• If you are not familiar with chainsaws and the
felling of trees, it is recommended that you
obtain further more detailed instructions and
information regarding chain-sawing in addition
to reading this manual fully. We also recommend
that inexperienced chainsaw users practice
cutting logs on a saw-horse or log cradle before
attempting to fell a tree.
• Keep work area clean.
• Do NOT start cutting until you have a clear work
area, secure footing and a planned, clear escape
path from the falling tree or limb.
• Use extreme caution when cutting small size
brush and saplings because the slender material
may catch the saw chain and be whipped toward
you or pull you off balance.
• Do NOT operate a chainsaw at height in a tree
or on a ladder unless specifically trained to do so.
• When cutting a limb that is under tension, be
alert for spring back so that you will not be
struck when the tension in the wood fibres is
released.
• Do NOT expose the chainsaw to rain.
• Do NOT use the chainsaw in damp or wet
conditions.
• Do NOT use the chainsaw in presence of
flammable liquids or gases.
• Keep children, bystanders and pets away from
the work area.
• When not in use, chainsaws should be stored in a
dry, secure location – well out of the reach of
children.
• Always fit the chain guard when not in use.
• Never force the chainsaw - it will do the job better and
safer when used correctly.
• Only suitable for use to cut wood with a diameter
smaller than the length of the guide bar.
• Do NOT use chainsaw for cutting plastic, masonry,
non-wood building materials.
• Do NOT use the chainsaw for any use other than the
intended use described in these instructions.
• Make sure you are suitably dressed when using the
chainsaw with correct standard Personal Protective
Equipment.
• Do NOT wear loose clothing or jewellery that can get
caught in moving parts. Heavy duty gloves and sturdy
non-slip work boots are recommended when working
outdoors.
• Wear a hairnet to contain long hair which can get
caught in moving parts.
• Always wear suitable head, ear and eye protection.
• Carry the chainsaw by the front handle with the saw
stopped, your finger off the trigger and the guide bar
and saw chain to your rear.
• Periodically inspect chainsaw for damage. Do NOT use
if damaged in any way.
• Always clean after use and replace worn parts when
performance becomes reduced.
• Do not smoke while handling fuel or while operating
the chainsaw.
• Follow instructions for lubricating and changing
accessories.
• Keep handles dry, clean and free from oil and grease.
• Turn off the chainsaw when not in use, before servicing
or cleaning, and when changing accessories and
attachments, such as saw chain and guard.
• Stay alert, watch what you are doing. Always use
common sense.
Warning
!
!
6
• Do NOT operate chainsaw when you are tired, ill
or under the influence of alchol or drugs.
• Using a chainsaw can be strenuous. Remember to
take regular breaks. Tiredness may result in loss of
control.
• Keep all parts of the body away from the chain
when the chainsaw is switched on.
• Before you start the saw, make sure the saw chain
is not in contact with anything.
• Always check for damaged parts before first and
every use or if the chainsaw is dropped. Do NOT
use if any part is damaged in any way. Check for
alignment of moving parts, binding of moving
parts, breakage of parts, mounting and any other
conditions that may affect operation. Any part that
is damaged should be properly repaired or replaced
by an authorised service centre unless otherwise
indicated elsewhere in this instruction manual.
• Regularly check that all the fixings are secure as
vibrations in use may cause them to loosen over
time.
• When servicing, use only identical replacement
parts.
• Do NOT use the chainsaw if the switch does not
turn it on and off.
• Do NOT operate a chainsaw that is damaged,
improperly adjusted, or is not completely and
securely assembled. Be sure that the saw chain
stops moving when the trigger is released before
using to cut wood.
• Guard against kickback.
• Only use replacement bars and chains specified by
the manufacturer or the equivalent.
• For outdoor domestic use only.
Warning
!
RESIDUAL RISKS
Despite the above warnings and due to the nature of
the product, there remains a residual risk, which
cannot be prevented when using a chainsaw. The
following potential hazards might apply:
• Contact with exposed saw teeth of the saw chain
(cutting hazards).
• Access to the rotating saw chain (cutting hazards).
• Unforeseen, abrupt movement of the guide bar
(cutting hazards.)
• Parts flung out from the saw chain (cutting/injection
hazards).
• Wood splinter ejection.
• Inhalation of wood particles and dust - there may
be health risks caused by breathing in dust,
especially dust generated from sawing oak, beech
and MDF.
• Skin contact with the lubricating oil.
• Loss of hearing, if ear protection is not worn.
INTENDED/UNINTENDED USE
When using the chainsaw, the user must arrange to
use personal protective equipment according to the
manual. Parts of the intended use are detailed in the
manual’s safety warnings and references for use by
those who work with the chain saw or maintain it,
therefore the user must be familiar with the manual.
Only use original or approved spare parts (e.g. guide
bar; saw chain).
7
Warning
!
Vibration Warning!
Prolonged use of chainsaws or any other machine
that vibrates in use, may produce a medical condition
called “white finger disease”, “Raynaud’s
phenomenon”, or “carpal tunnel syndrome”.
These conditions can cause numbness, burning
sensations and circulation damage, and may reduce
the hand’s ability to feel and regulate temperature.
The factors that contribute to these conditions are
not fully known, but high vibrations may be a cause.
Users should take precautions to minimise the risks
which include:
• Wear gloves
• Keep hands warm
• Take breaks from prolonged use
• Keep the chain saw sharp so that it operates as
smoothly as possible
• Maintain a firm grip but do not squeeze too tight
and for too long at any one time.
Continual and regular users should monitor their
hands and fingers and if any symptoms occur, or if
you are worried at any time, cease use and consult
your medical practitioner for further advice.
Warning! Restriction of use.
Please check with your local authority before using a
chainsaw as there may be regulations in force that
restrict their use e.g. in times of drought.
Warning! Hearing protection.
It is recommended that safety ear/hearing protection
is worn at all times when operating this chain saw.
Chain saw noise may damage your hearing. Regular
users should have frequent hearing tests with their
medical practitioner.
The hearing protection should be suitable for
defending hearing for the following levels:
Sound pressure level according to ISO22868
LPA:108dB(A).
Sound pressure level according to ISO22868 LWA:
<116dB(A)
Inhalation Warning!
Using the chainsaw may generate dust, mist and
fumes containing chemicals that could be harmful to
the user. Dust alone may also be harmful and should
not be inhaled. Never use the chain saw to cut
anything that is known to contain a harmful
substance such as asbestos. Always operate the
chainsaw in a well-ventilated location, preferably
outdoors. Remember that the fuel and oil used to
power and lubricate this machine will give off
harmful fumes in use, and when filling – always
ensure there is sufficient ventilation as soon as you
start the engine. A dust mask or breathing apparatus
is recommended safety equipment, and anyone with
a respiratory or other breathing medical condition is
advised to consult their medical practitioner before
using the chainsaw.
8
KICKBACK SAFETY PRECAUTIONS FOR CHAINSAW USERS
WARNING
Kickback may occur when the nose or tip of the guide bar touches an
object, or when the wood closes in and pinches the saw chain in the cut.
Tip contact in some cases may cause a lightning fast reverse reaction,
kicking the guide bar up and back towards the operator. Pinching the saw
chain along the top of the guide bar may push the guide bar rapidly back
towards the operator. Either of these reactions may cause you to Iose
control of the chainsaw, which could result in serious personal injury.
Do not rely exclusively on the safety devices built into your chainsaw. As a
chainsaw user you should take several steps to keep cutting jobs free from
accident or injury.
(1) With a basic understanding of kickback you can reduce or eliminate the
element of surprise. Sudden surprise contributes to accidents.
(2) Keep a good grip on the saw with both hands, the right hand on the rear
handle, and the left hand on the front handle, when the engine is running.
Use a firm grip with thumbs and fingers encircling the chain saw handles.
A firm grip will help you reduce kickback and maintain control of the saw.
(3) Make certain that the area in which you are cutting is free from
obstructions. Do not let the nose of the guide bar make contact with a
log, branch, or any other obstruction which could be hit while you are
operating the saw.
(4) Cut at high engine speeds.
(5) Do not overreach or cut above shoulder height.
(6) Follow the manufacturer’s sharpening and maintenance instructions for
the saw chain.
(7) Only use replacement bars and chains specified by the manufacturer
or the equivalent.
!
!
For safe operation
K
ickback
situations
Good grip
positions
Correct
handle grip
Incorrect
handle grip
Do not
overreach
9
AVOIDING PULL-IN
Pull-in can occur when the bottom of the chain is used for
cutting and is stopped suddenly by hitting a foreign object
or getting pinched. This pulls the chainsaw forwards and
may cause the user to lose control. Pull-in can also occur
when the chain is not running at full speed when contact is
made with the wood and if the bumper spike is not held
securely against the wood being cut.
• Ensure the chain is rotating at full speed and the bumper
spike is correctly positioned when making a cut.
AVOIDING PUSHBACK
Pushback can occur when the top of the chain is used for
cutting and is stopped suddenly by hitting a foreign object
or getting pinched. This pulls the chainsaw towards the
user and may cause the user to lose control.
• Take care not to twist the chainsaw as it is removed
when bucking from underneath the log.
• Do NOT cut more than one log at any one time.
• Be aware of situations that may cause the chain to pinch
or pull.
BUMPER SPIKE
This is used to help secure the tree or limb when cutting
and should be used at all times when positioning the
chainsaw. It will help prevent pull-in, pushback, kickback
and loss of control.
!
For safe operation
Bumper
Spike
10
A standard saw unit package contains the items (F0).
(1) Power unit
(2) Saw guard
(3) Guide bar
(4) Saw chain
(5) Plug wrench
(6) Screwdriver for carburetor adjustment
(7) Spike, 2 screws and Allen key
Open the box and install the guide bar and the saw
chain on the power unit as follows:
Warning
The saw chain has very sharp edges.
Use thick protective gloves for safety.
1. Pull the front guard towards the front handle to
check that the chain brake is not engaged.
2. Loosen the nuts using the wrench and remove the
chain cover.
3. Install the spike to the power unit. Secure using
2x screws and Allen key (F1).
4. Gear the chain to the sprocket and, while fitting
the saw chain around the guide bar, mount the
guide bar to the power unit. Adjust the position of
the chain tensioner (F2).
(1) Tensioner nut
(2) Chain cover
Note
Pay attention to the correct direction of the saw
chain (F3)
Installing guide bar and saw chain
!
(F0)
(F2)
(F3)
(1) Moving
direction
(F1)
11
5. Fit the chain cover to the power unit and
fasten the nuts to finger tightness.
6. While holding up the tip of the bar, adjust the
chain tension by turning the tensioner screw
until the tie straps just touch the bottom side of
the bar rail (F4).
7. Tighten the nuts securely with the bar tip held
up (12-15N.m). Then check the chain for
smooth rotation and proper tension while
moving it by hand.
If necessary, readjust with the chain cover loose.
8.Tighten the tensioner screw.
(1) Loosen
(2) Tighten
(3) Tensioner screw
Note
A new chain will loosen during first use. Check
and readjust the tension frequently as a loose
chain can easily derail or cause rapid wear of
itself and the guide bar.
Installing guide bar and saw chain
(F4)
12
Fuel and chain oil
FUEL
• Petrol is flammable.
• Always turn off the engine and allow to cool fully
before refuelling.
• Mix regular unleaded petrol and a quality 2-stroke
motor oil for air-cooled engines at a ratio of 25:1.
• Do not use 4-stroke oil.
• Do not mix fuel and oil in the petrol tank of the
chainsaw. Always use the mixing bottle supplied,
secure the lid and shake to mix.
• Keep naked flames away from where petrol is stored
or handled.
• Do not use petrol/oil mix more than 1 month old.
• Always use caution when handling fuel. Wipe up all
spills and then move the chainsaw at least 3m from
the fueling point before starting the engine.
• Eliminate all sources of sparks or flame (i.e. smoking,
open flames, or work that can cause sparks) in the
areas where fuel is mixed, poured or stored.
CHAIN OIL
Use motor oil SAE 10W-30 all year round or
SAE 30 ~ 40 in summer and SAE 20 in winter.
Note
Do not use old or regenerated oil that can cause
damage to the oil pump.
Use caution
w
hen handling
fuel
Keep your
distance from
fuel point when
using chainsaw
Keep fuel away
from naked
flame
Only use
recommended
motor oil
Warning
It is very dangerous to run a chainsaw that has any broken
or moving parts or lacks any parts. Before starting the
engine, make sure that all the parts including bar and
chain are installed properly. Check the chainsaw before
every use and do not use if damaged in any way
Do not allow other persons to be near the chain saw when
starting or cutting. Keep bystanders and animals out of the
work area. Children, pets and bystanders should be a
minimum of 10m away when you start or operate the
chainsaw.
Never start cutting until you have a clear work area, secure
footing, and a planned retreat path from the falling tree.
Before you start the engine, make sure the saw chain is not
contacting anything including the ground.
Keep the handles dry, clean and free of oil or fuel mixture.
STARTING THE ENGINE
1. Fill fuel and chain oil tanks respectively, and tighten the
caps securely (F5).
2. Ensure the chain brake is on (see diagram below).Push the
front guard down towards the guide bar. Set the switch to
"I" position (F6).
(1) Chain oil
(2) Fuel
(3) Switch
Operation
(F5)
(F6)
!
Keep people
a
nd animals at
safe distance
Work in safe
and secure
area
Clear of ground
when starting
motor
13
14
3.While holding the throttle trigger and pressing down on the
throttle interlock, push in the side throttle lock button and
release the throttle trigger to hold it at the starting position (F7).
(4) Throttle lever
(5) Throttle trigger
(6) Throttle interlock
4. Pull out the choke knob (F8)
(7) Choke knob.
5. While holding the chainsaw unit securely on the ground, pull
the starter rope vigorously (F9). Pull the starter rope upwards,
not to the side. Pulling to the side may cause the rope to fray. It
may take 3 or 4 pulls to start the engine. If the engine does not
start after 3-4 attempts, open the choke further and try again.
Warning
Do not start the engine while the chainsaw hangs in one hand.
The saw chain may touch your body. This is very dangerous.
6.When the engine has started gradually push the choke in.
7. Allow the engine to warm up with the throttle lever pulled
slightly.
8. Release the chain brake by pulling it towards you.
Warning
Keep clear of the saw chain upon starting of engine.
Operation
(F7)
(F8)
(F9)
!
!
(6)
15
CHECKING THE OIL SUPPLY
Warning
Make sure the bar and the chain are set
up when checking the oil supply. If not,
the rotating parts may be exposed and
this is very dangerous. After starting the
engine, run the chain at medium speed
and see if chain oil is scattered off as
shown (F10).
The chain oil flow can be changed by
inserting a screwdriver in the hole on
bottom of the clutch side. Adjust
according to your work conditions (F11).
(1) Heavy flow
(2) Light flow
(3) Chain oil flow adjusting hole
Note
The oil tank should become nearly
empty by the time fuel is used up. Be
sure to refill the oil tank every time
when refueling the chainsaw.
ADJUSTING THE CARBURETOR (F12)
The carburetor on your unit has been
factory adjusted but may require fine
tuning due to a change in operating
conditions. Before adjusting the
carburetor, make sure that the provided
air/fuel filters are clean and fresh and
the fuel properly mixed.
Operation
!
(F10)
(F11)
(1) Chain oil
16
When adjusting, take the following steps:
Note
Be sure to adjust the carburetor with the bar chain
attached.
1. H and L needles are restricted within the number
of turn as shown below.
H needle: 1+ or –
3
/
8
L needle: 1
1
/
4
+ or –
1
/
4
2. Start the engine and allow it to warm up in low
speed for a few minutes.
3. Turn L needle slowly clockwise to find a position
where the idling speed is maximum then move
the needle back a quarter turn anti-clockwise.
4. Turn the idle adjusting screw T anti-clockwise so
that the saw chain does not turn. If the idling
speed is too slow, turn the screw clockwise.
5. Make a test cut and adjust the H needle for best
cutting power, not for maximum speed.
(1) L needle
(2) H needle
(3) T idle adjusting screw
CHAIN BRAKE
This machine is equipped with an automatic brake
to stop saw chain rotation upon occurrence of
kickback during saw cutting. The brake is
automatically operated by inertial force, which acts
on the weight fitted inside the front guard.
This brake can also be operated manually with the
front guard turned down to the guide bar.
To release the brake, pull up the front guard toward
the front handle till “click” sound is heard (F13).
Operation
(F12)
(F13)
CLUTCH
To check the operation of the clutch run the saw at idle
speed and there shoud be no movement of the chain. If
chain moves there may be clutch wear or idle is
adjusted too high.
17
Important
[Caution]
Check brake operation before each use.
How to confirm:
1) Turn on the engine.
2) Holding the chain saw horizontally, release your hand from the front
handle, hit the tip of the guide bar to a stump or a piece of wood, and
confirm brake operation. Operating level varies by bar size (F14).
If the engine is kept running at high speed whilst the brake is engaged,
the clutch will overheat and become damaged.
Always hold the chainsaw firmly with both hands when the engine is
running. Use a firm grip with thumb and fingers encircling the chain saw
handles.
Keep all parts of your body away from the saw chain when the engine is
running.
All chainsaw service, other than the items listed in the Instructions, should
be performed by competent chainsaw service personnel. (e.g., if improper
tools are used to remove the flywheel, or if an improper tool is used to
hold the flywheel in order to remove the clutch, structural damage to the
flywheel could occur which could subsequently cause the flywheel to
disintegrate.)
Always turn off the engine before putting the chainsaw down.
Use extreme caution when cutting small size brush and saplings because
slender material may catch the saw chain and be whipped toward you or
pull you off balance, or stop the chain.
When cutting a limb that is under tension, be alert for spring-back so that
you will not be struck when the tension in the wood fibres is released.
Kickback is the upward motion of the guide bar which occurs when the
saw chain at the nose of the guide bar makes contact with an object.
Kickback can lead to dangerous loss of control of the chainsaw.
STOPPING THE ENGINE
1. Release the throttle lever to allow the engine to idle for a few minutes.
2. Set the switch to the "O" (STOP) position (F15).
3. Be aware that the chain will continue to move for a short time after the
engine has stopped.
Operation
!
(F14)
(F15)
(1) Switch
Chainsaw
service dealer
18
Warning
Before proceeding to your job, read For Safe
Operation section p7-8. It is recommended to first
practice sawing easy logs. This also helps you get
accustomed to your unit. Always follow the safety
regulations. The chainsaw must only be used for
cutting wood. It is not suitable for cutting any other
type of material. Vibrations and kickback vary with
different types of woods. Do not use the chainsaw
as a lever for lifting, moving or splitting objects. It is
not necessary to force the saw into the cut. Apply
only light pressure while running the engine at full
throttle. When the saw chain is caught in the cut,
do not attempt to pull it out by force, but use a
wedge or a lever to open the way. Do not fit any
other tools to the chainsaw or use for any other
purpose other than those specified in these
instructions.
Sawing
!
Good grip
p
ositions
Correct
h
andle grip
Correct
distance
Incorrect
distance
Incorrect
h
andle grip
Clear of ground
when starting
motor
(F15)
GUARD AGAINST KICKBACK (F15)
This saw is equipped with a chain brake that will stop
the chain in the event of kickback if operating
properly. You must check the chain brake operation
before each usage by running the saw at full the
throttle for I – 2 seconds and pushing the front hand
guard forward. The chain should stop immediately
with the engine at full speed. If the chain is slow to
stop or does not stop, replace the brake band and
clutch drum before use.
It is extremely important that the chain brake be
checked for proper operation before each use and
that the chain be sharp in order to maintain the
kickback safety level of this saw. Removal of the
safety devices, inadequate maintenance, or incorrect
replacement of the bar or chain may increase the risk
of serious personal injury due to kickback and will
invalidate your warranty (F15).
19
Sawing
Once the direction of fall is determined, clear two
escape routes. These should be in the opposite
direction to the planned direction of fall and
approximately at 45° to the position of the undercut.
Ensure that tools and equipment do not block the
escape routes at any time.
Further precautions to be taken when felling trees:
• Take extra care when felling in the vicinity of power
lines, railway lines and roads. If the tree felling is
too dangerous to perform due to these hazards, do
NOT proceed with the felling and seek professional
advice from a qualified arborist.
• Always ensure a work area of 2½ tree lengths is
clear of people around the tree.
• Trees with large buttress roots may require the
buttress root to be cut before felling. To do this cut
vertically into the buttress root and then
horizontally until the buttress root becomes loose
and can be removed.
Felling:
• The chainsaw must be running before it comes into
contact with the wood. Switch on the chainsaw.
Saw a notch (remove a 45° wedge of trunk) up to
¼ of the depth of the trunk into a low part of the
tree trunk in the direction of the fall and then
remove the loose piece.
FELLING TREES
To fell a tree, observe all the safety regulations and
proceed as follows:
The chainsaw may be used to fell only trees with
trunks which are smaller in diameter than the length
of the guide bar. If the saw chain gets jammed,
release it using a wooden wedge. Do not try to lever
the saw out of the cut. When felling on a slope,
always stand uphill of the tree.
Check the tree for signs of damage or decay before
felling. Decayed trees can split during felling and dead
or loose branches could free themselves through the
vibrations of the sawing action. Felling trees is
dangerous and requires practice. If you are a beginner
or inexperienced using chainsaws seek professional
training.
First determine the likely direction of fall using the
following criteria:
• The intended direction of fall.
• The wind direction and wind speed.
• The natural lean of the tree.
• Slope of the ground.
• Any surrounding tree or building which may
obstruct, deflect or cause the falling tree to change
direction.
• Any other factors, such as uneven branch
configuration which could cause the tree to be
heavier on one side than the other.
FELLING
FELLING
FELLING
CUT
UNDERCUT
(SINKCUT)
DIRECTION
DIRECTION
ESCAPE
R
OUTE
ESCAPE
ROUTE
D
ANGER ZONE
Z
ONE
D
ANGER
20
Bucking and Limbing
Bucking is cutting a fallen log into smaller
lengths. Limbing is the removal of branches
from a fallen tree.
Warning
Always ensure you have a firm foothold. Do not
stand on the log. Be alert to the rolling over of a cut
log. Especially when working on a slope, stand on
the uphill side of the log. Follow the instructions in
For Safe Operation p.7-8 to avoid kickback of the
chainsaw.
Before starting work, check the direction of bending
force inside the log to be cut. Always finish cutting
from the opposite side of bending direction to prevent
the guide bar from being caught in the cut.
A log lying on the ground (F17)
Saw down half way, then roll the log over and cut
from the opposite side.
A log hanging off the ground (F18)
In area A, saw up from the bottom one-third and
finish by sawing down from the top. In area B, saw
down from the top one-third and finish by sawing up
from the bottom.
Cutting limb of fallen tree (F19)
First check to which side the limb is bent. Then make
the initial cut from the bent side and finish by sawing
from the opposite side.
Sawing
!
(F17)
(F18)
(F19)
Felling: (continued)
• Make a horizontal cut on the side opposite to the
notch; ensuring approximately a tenth of the
diameter of the trunk is not sawn, forming a hinge
which will allow the tree to fall in a controlled
manner. Do NOT cut all the way through the
hinge as this could de-stabilise the falling tree.
• Always stand to the side of the falling tree, never
behind it.
• When the tree begins to fall, remove the chainsaw,
switch the chainsaw off, call a warning of “Timber!”,
and retreat through the cleared escape route.
Beware of falling limbs as you retreat.
• When the tree falls, watch the crown. Wait for the
crown to stop moving. Do NOT continue to work
under branches which have got stuck and possibly
support the weight of the crown.
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