Daewoo DCS2512, User Manual

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16
EXPLANATION OF SYMBOLS AND SAFETYWARNINGS
1. FOR SAFE OPERATION
WARNING
This chainsaw has been especially designed for tree maintenance and should therefore only be
used by trained operators when working on trees. GB-4
1. Never operate a chain saw when you are fatigued, ill, or upset, or under
the influence of medication that may make you drowsy, or if you are under the
influence of alcohol or drugs.
2. Use safety footwear, snug fitting clothing and eye, hearing and head
protection devices. Use the vibration-proof glove.
3. Keep the saw chain sharp and the saw, including the AV system, well
maintained. A dull chain will increase cutting time, and pressing a dull
chain through wood will increase the vibrations transmitted to your hands.
A saw with loose components or with damaged or worn AV buffers will also
tend to have higher vibration levels.
4. Always use caution when handling fuel. Wipe up all spills and then move
the chain saw at least 3 m from the fueling point before starting the engine.
5. 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.
6. Do not smoke while handling fuel or while operating the chain saw.
7. 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 10 m away when
you start or operate the chain saw.
8. Never start cutting until you have a clear work area, secure footing,
and a planned retreat path from the falling tree.
9. Always hold the chain saw firmly with both hands when
the engine is running. Use a firm grip with thumb and
fingers encircling the chain saw handles.
10. Keep all parts of your body away from the saw chain
when the engine is running.
11. Before you start the engine, make sure the saw chain is not
contacting anything.
12. Always carry the chain saw with the engine stopped, the guide bar and
saw chain to the rear, and the muffler away from your body.
13. Always inspect the chain saw before each use for worn, Ioose, or damaged
parts. Never operate a chain saw that is damaged, improperly
adjusted, or is not completely and securely assembled. Be sure that the saw
chain stops moving when the throttle control trigger is released.
14. All chain saw service, other than the items listed in the Owner’s Manual,
should be performed by competent chain saw 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.)
15. Always shut off the engine before
setting it down.
16. 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.
17. 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 fibers is released.
18. Never cut in high wind, bad weather, when visibility is
poor or in very high or low temperatures. Always check
the tree for dead branches which could fall during the felling operation.
19. Keep the handles dry, clean and free of oil or fuel mixture.
20. Operate the chain saw only in well ventilated areas. Never start or run
the engine inside a closed room or building. Exhaust fumes contain dangerous
carbon monoxide.
21. Do not operate the chain saw in a tree unless specially trained to do so.
22. Guard against kickback. Kickback is the upward motion of the guide
bar which occurs when the saw chain at the nose of the guide bar contacts
an object. Kickback can lead to dangerous loss of control of the chain saw.
23. When transporting your chain saw, make sure the appropriate guide bar
scabbard is in place.
24. Never touch the muffer guard, guide bar, saw chain or nut with bare hands
while the engine is in operation or immediately after shutting down the
engine. Doing so could result in serious burns because of high temperature.
KICKBACK SAFETY PRECAUTIONS FOR CHAIN SAW 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 alightning 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 saw, which could result in serious personal injury.
• Do not rely exclusively on the safety devices built into your saw. As a chain
saw 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 G you are cutting is free from obstruc- B
tions. Do not let the nose of the guide bar contact a log, branch, or any othe
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.
WORSE EFFECTS OF VIBRATION
If you continue to use high-vibration tools these symptoms will probably get worse, for example:
• the numbness in your hands could become permanent and you won’t be able to feel things at all;
• you will have difficulty picking up small objects such as screws or nails;
• the vibration white finger could happen more frequently and affect more of your fingers.
FOR PROTECTINGYOUR BODY FROMVIBRATION
Please observe the following matter, in order to protect the health of your body.
1. Always use the right tool for each job (to do the job more quickly and expose you to less
hand-arm vibration).
2. Check tools before using them to make sure they have been properly maintained and repaired to
avoid increased vibration caused by faults or general wear.
3. Make sure cutting tools are kept sharp so that they remain efficient.
4. Reduce the amount of time you use a tool in one go, by doing other jobs in between.
5. Avoid gripping or forcing a tool or workpiece more than you have to.
6. Store tools so that they do not have very cold handles when next used.
7. Encourage good blood circulation by:
• keeping warm and dry (when necessary, wear gloves, a hat, waterproofs and use heating pads if
available);
• giving up or cutting down on smoking because smoking reduces blood flow; and massaging and
exercising your fingers
DISPOSAL
• When you dispose of the machine, do not disassemble the machine.
• When you dispose of the machine, fuel, chain oil, be sure to follow your local regulations.
WORKINGWITH TREE SERVICE CHAIN-SAWS FROM A ROPE AND HARNESS
This chapter sets out working practices to reduce the risk of injury from tree service chainsaws
when working at height from a rope and harness. While it may form the basis of guidance and
training literature, it should not be regarded as a substitute for formal training.
General requirements working at height
Operators of tree service chainsaws working at height from a rope and harness should never work
alone. A competent ground worker trained in appropriate emergency procedures should assist
them. Operators of tree service chainsaws for this work should be trained in general safe climbing
and work positioning techniques and shall properly equipped with harnesses, ropes, strops,
karabiners and other equipment for maintaining secure and safe working positions for both
themselves and the saw.
Preparing to use the saw in the tree
The chainsaw should checked, fuelled, started and warmed up by the
ground worker before it is sent up to the operator in the tree.
The chainsaw should be fitted with a suitable strop for
attaching to the operator’s harness:
a) choke the strop around the attachment
point on the rear of the saw (A);
b) provide suitable karabiners to allow indirect (i.e. via
the strop) and direct attachment (i.e. at the attachment
point on the saw) of saw to the operators harness;
c) ensure the saw is securely attached when it is being sent up to the operator;
d) ensure the saw it secured to the harness before it is disconnected from the means of ascent.
The saw should only be attached to the recommended attachment points on the harness.
These may be at mid-point (front or rear) or at the sides. Where possible attaching
the saw to centre rear mid-point will keep it clear of climbing lines and support
its weight centrally down the operator’s spine.
When moving the saw from any attachment point to another, operators should ensure it is secured
in the new position before releasing it from the previous attachment point.
Using the chainsaw in the tree
An analysis of accidents with these saws during tree service operations shows the primary cause as
being inappropriate one-handed use of the saw. In the vast majority of accidents, operators fail to
adopt a secure work position witch allows them to hold both handles of the saw. This results in an
increased risk of injury due to:
• not having a firm grip on the saw if it kicks back;
• a lack of control of the saw such that it is more liable to contact climbing lines and operators body
(particularly the left hand and arm)
• losing control from insecure work position resulting in contact with the saw (unexpected
movement during operation of the saw)
Securing the work position for two-handed use
To allow the operator to hold the saw with both hands, they should as general rule, aim for secure
work position where they are operating the saw at:
• hip level when cutting horizontal sections;
• solar plexus level when cutting vertical sections.
Where the operator is working close into vertical stems with a low lateral forces
on their work position, then a good footing may be all that is needed to maintain
a secure work position. However as operators move away from the stem, they
will need to take steps to remove or counteract the increasing lateral forces by,
for example, a re-direct of the main line via a supplementary anchor point or
using an adjustable strop direct from the harness to a supplementary anchor
point.
Gaining a good footing at the working position can be assisted by use of a
temporary foot stirrup created from an endless sling.
Starting the saw in the tree
When starting the saw in the tree, the operator should:
a) apply the chain brake before starting;
b) hold saw on either the left or right of the body when starting:
1) on the left side hold the saw with either the left hand on the front handle or the right hand on the
rear handle and thrust the saw away from the body while holding the pull starter cord in the other
hand;
2) on the right side, hold the saw with the right hand on either handle and thrust the saw away from
the body while holding the pull starter cord in the left hand.
The chain brake should always be engaged before lowering a running saw onto its strop.
Operators should always check the saw has sufficient fuel before undertaking critical cuts.
One-hand use of the chainsaw
Operators should not use tree service chainsaws onehanded in place of
unstable work positioning or in preference to a handsaw when cutting small diameter
wood at the branch tips. Tree service chainsaws should only be
used one-handed where:
• the operator cannot gain a work position enabling two- handed use; and
• they need to support their working position with one hand; and
• the saw is being used at full stretch, at right angles to and out of line
with the operator’s body.
Operators should never:
• cut with the kickback zone at the tip of the chainsaw guide bar
• ‘hold and cut’ sections
• attempt to catch falling sections.
Freeing a trapped saw
If the saw should become trapped during cutting, operators
should:
• switch off the saw and attach it securely to the tree inboard (i.e. towards the truck side) of the cut
or to a separate tool line;
• pull the saw from the kerf whilst lifting the branch as necessary;
• if necessary, use a handsaw or second chain saw to release the trapped saw by cutting a
minimum of 30 cm away from the trapped saw.
Whether a handsaw or a chainsaw is used to free a stuck saw, the release cuts should always be
outboard (toward the tips of the branch), in order to prevent the saw being taken with the section
and further complicating the situation.
2. EXPLANATION OF SYMBOLS ON THE MACHINE
WARNING
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.
The port to refuel “MIX GASOLINE”
Position: Fuel cap
The port to top up chain oil
Position: Oil cap
Setting the switch to the “O” position, the engine stops immediately.
Position: Front at the top of the rear handle
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 aircleaner cover
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: Left side of the rear handle
Shows the directions that the chain brake is released (white arrow) and
activated (black arrow).
Position: Front of the chain cover
If you turn the rod by screwdriver follow the arrow to the "MAX" position,
the chain oil flow more, and if you turn to the "MIN" position, less.
Position: Bottom of the power unit.
3. INSTALLING GUIDE BAR AND SAW CHAIN
A standard saw unit package contains the items as illustrated.
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 guard towards the front handle to check that the chain
brake is not engaged.
2. Loosen the nuts and remove the chain cover.
3. Fix the hanger on the rear of power unit by screw.
4. Mount the guide bar then fit the saw chain around
the bar and sprocket.
NOTE
Pay attention to the correct direction of the saw chain.
Moving direction
5. Fit the chain tensioner nut into the lower hole of the guide bar,
then install the chain cover, and fasten the mounting nut to finger tightness.
WARNING
When installing the chain cover, be sure to fit the hook completely
at the rear end of the cover.
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.
7. Tighten the nuts securely with the bar tip held up
(11.8-14.7 N.m./120-150 kg-cm). 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.
WARNING
A new chain will expand its length in the beginning of use.
Check and readjust the tension frequently as a loose chain
can easily derail or cause rapid wear of itseif and the guide bar.
4. FUEL AND CHAIN OIL
FUEL
WARNING
• Gasoline is very flammable. Avoid smoking or bringing any flame or sparks
near fuel. Make sure to stop the engine and allow it cool before refueling the unit.
Select outdoor bare ground for fueling and move at least 3 m (10 ft) away from
the fueling point before starting the engine.
• The Daewoo engines are lubricated by oil specially formulated
for air-cooled 2-cycle gasoline engine use. If Zenoah oil is not available,
use an anti-oxidant added quality oil expressly labeled for air-cooled 2-cycle
engine use (JASO FD GRADE OIL or ISO-L-EGD GRADE).
• Do not use BIA or TCW (2-stroke water-cooling type) mixed oil.
RECOMMENDED MIXING RATIO GASOLINE 50 : OIL 1
<when using Daewoo genuine oil>
(JASO FD GRADE OIL or ISO-L-EGD GRADE)
• Exhaust emission are controlled by the fundamental engine parameters and components (eq.,
carburation, ignition timing and port timing) without addition of any major hardware or the
introduction of an inert material during combustion.
• These engines are certified to operate on unleaded gasoline.
• Make sure to use gasoline with a minimum octane number of 89RON (USA/Canada: 87AL).
• If you use a gasoline of a lower octane value than prescribed, there is a danger that the engine
temperature may rise and an engine problem such as piston seizing may consequently occur.
• Unleaded gasoline is recommended to reduce the contamination of the air for the sake of your
health and the environment.
• Poor quality gasolines or oils may damage sealing rings, fuel lines or fuel tank of the engine.
HOWTO MIX FUEL
WARNING
• Pay attention to agitation.
1. Measure out the quantities of gasoline and oil to be mixed.
2. Put some of the gasoline into a clean, approved fuel container.
3. Pour in all of the oil and agitate well.
4. Pour in the rest of gasoline and agitate again for at least one minute. As some oils may be difficult
to agitate depending on oil ingredients, sufficient agitation is necessary for the engine to last long.
Be careful that, if the agitation is insufficient, there is an increased danger of early piston seizing
due to abnormally lean mixture.
5. Put a clear indication on the outside of the container to avoid mixing up with gasoline or other
containers.
6. Indicate the contents on outside of container for easy identification.
FUELINGTHE UNIT
1. Untwist and remove the fuel cap. Rest the cap on a dustless place.
2. Put fuel into the fuel tank to 80% of the full capacity.
3. Fasten the fuel cap securely and wipe up any fuel spillage around the unit.
WARNING
1. Select bare ground for fueling.
2. Move at least 10 feet (3 meters) away from the fueling point before starting the engine.
3. Stop the engine before refueling the unit. At that time, be sure to sufficiently agitate the mixed
gasoline in the container.
FORYOUR ENGINE LIFE, AVOID:
1. FUELWITHNO OIL (RAWGASOLINE) – It will cause severe damage to the internal engine parts
very quickly.
2. GASOHOL – It can cause deterioration of rubber and/or plastic parts and disruption of engine
lubrication.
3. OIL FOR 4-CYCLE ENGINE USE – It can cause spark plug fouling, exhaust port blocking, or piston
ring sticking.
4. Mixed fuels which have been left unused for a period of one month or more may clog the
carburetor and result in the engine failing to operate properly.
5. In the case of storing the product for a long period of time, clean the fuel tank after rendering it
empty. Next, activate the engine and empty the carburetor of the composite fuel.
6. In the case of scrapping the used mixed oil container, scrap it only at an authorized repository
site.
NOTE
As for details of quality assurance, read the description in the section Limited Warranty carefully.
Moreover, normal wear and change in product with no functional influence are not covered by the
warranty. Also, be careful that, if the usage in the instruction manual is not observed as to the mixed
gasoline, etc. described therein, it may not be covered by the warranty.
SUPPLYING CHAIN OIL
WARNING
Running the equipment for long hours with its chain oil run out will accelerate the wear and tear of
the chain and guide bar, possibly resulting further in a chain cut and even in a fatal accident leading
to death.
1. For chain oil, use a type that is sufficiently viscous and adequately lubricating under the
summer-use conditions and another type that shows similar performance under the winter-use
conditions.
2. The use of Zonoah genuine chain oil is recommended to make your chain saws last as long as
possible. If no genuine chain oil is available, please use commercially available chain oil, which is
commonly used.
CAUTION
Using waste oil, recycled oil, or anything similar causes a breakdown and also proves harmful to the
human body and environment. Please do not under any circumstances use any such material.
IMPORTANT
Use chain oil of vegetable origin. Before storing it for a long period, remove the chain oil from the
blade and chain groove and clean them. If not, the chain may become rusted. Chain rust will cause
the chain to become rigid or to become viscous at the tip.
5. OPERATING THE ENGINE
WARNING
It is very dangerous to run a chainsaw that mounts broken parts or lacks any parts.
Before starting engine, make sure that all the parts including bar and chain are installed properly.
STARTING THE ENGINE
1. Fill fuel and chain oil tanks respectively, and tighten the caps securely.
2. Continuously push the priming bulb until fuel comes in the bulb.
3. Set the switch to “I” position.
4. Pull out the choke knob to the second-stage position.
The choke will close and the throttle lever will then
be set in the starting position.
NOTE
When restarting immediately after stopping the engine, set the Choke knob in the first-stage
position (choke open and throttle lever in the starting position). Once the choke knob has been
pulled out, it will not return to the operating position even if you press down on it with your finger.
When you wish to return the choke knob to the operating position, pull out the throttle lever instead.
5. While holding the saw unit securely on the ground, pull the starter rope vigorously.
WARNING
Do not start the engine while the chain saw hangs in one hand. The saw chain may touch your body.
This in very dangerous.
6. When engine has ignited, first push in the choke knob to the first-stage position and then pull the
starter again to start the engine.
7. Allow the engine to warm up with the throttle lever pulled slightly.
CHECKINGTHE OIL SUPPLY
WARNING
Make sure to set up the bar and the chain when checking the oil supply. If not, the rotating parts
may be exposed. It is very dangerous.
After starting the engine, run the chain at medium speed and see if
chain oil is scattered off as shown in the figure.
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.
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 saw.
ADJUSTINGTHE CARBURETOR
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.
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 : -1/4
L needle : -1/4
2. Start the engine and allow it to warm up in low speed for a few minutes.
3. Turn the idle adjusting screw (T) counterclockwise so that the saw chain does not turn. If the
idling speed is too slow, turn the screw clockwise.
4. Make a test cut and adjust the H needle for best cutting power, not for maximum speed.
CHAIN BRAKE
The chain brake is a device which stops the chain instantaneously if the chain saw recoils due to
kickback. Normally, the brake is activated automatically by inertial force. It can also be activated
manually by pushing the brake lever (left-hand guard) down toward the front.
When the brake operates, a yellow cone pops up from the base of the brake lever.
Releasing the Brake
Pull the brake lever up toward the left-hand handle until it clicks into place.
WARNING
• When the brake operates, release the throttle lever to slow down the engine speed. Continuous
operation with the brake engaged will generate heat from the clutch and may cause trouble.
• At machine inspection prior to each job, check the operating condition of the brake following the
steps.
1. Start the engine and grasp the handle securely with both hands.
2. Pulling the throttle lever to maintain the chain operation, push the brake lever (left-hand guard)
down toward the front using the back of your left hand.
3. When the brake operates and the chain is stopped, release the throttle lever.
4. Release the brake.
STOPPINGTHE 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.
6. SAWING.
WARNING
• Before proceeding to your job, read the section “For Safe
Operation”. It is recommended to first practice sawing easy
logs. This also helps you get accustomed to your unit.
• Always follow the safety regulations. The chain saw must
only be used for cutting wood. It is forbidden to cut other
types of material. Vibrations and kickback vary with different
materials and the requirements of the safety regulations
would not be respected. Do not use the chain saw as a lever
for lifting, moving or splitting objects. Do not lock it over
fixed stands. It is forbidden to hitch tools or applications to
the PTO other than those specified by the manufacturer.
• 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.
• If the guide bar and saw chain becomes caught in wood while operating it, stop the engine.
Do not pry the handle with excessive force. Use a wedge to remove the chain instead.
GUARD AGAINST KICKBACK
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 G drum before use. B
• 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 ot serious personal injury due to kickback.
FELLING A TREE
1. Decide the felling direction considering the wind, lean of the tree, location of heavy branches,
ease of completing the task after felling and other factors.
2. While clearing the area around the tree, arrange a good foothold and retreat path.
3. Make a notch cut one-third of the way into the tree on the felling side.
4. Make a felling cut from the opposite side of the notch and at a level slightly higher than the
bottom of the notch.
WARNING
When you fell a tree, be sure to warn neighboring workers of the danger.
Bucking and Limbing
WARNING
• Always ensure your 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” to avoid kickback of the saw.
Before starting work, check the direction of bending force inside the log to be cut. Always finish
cutting from the opposite side of the bending direction to prevent the guide bar from being caught
in the cut.
A log lying on the ground
Saw down halfway, then roll the log over and cut f
rom the opposite side.
A log hanging off the
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 the limbs of Fallen Tree
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.
WARNING
Be alert to the springing back of a cut limb.
Pruning of Standing Tree
Cut up from the bottom, finish down from the top.
WARNING
• Do not use an unstable foothold or ladder.
• Do not overreach.
• Do not cut above shoulder height.
• Always use both your hands to hold the saw.
7. MAINTENANCE
WARNING
Before cleaning, the inspecting or repairing the unit, make sure that engine has stopped and is cool.
Disconnect the spark plug to prevent accidental starting.
MAINTENANCE AFTER EACH USE
1. Air filter
Loosen the knob and remove the air cleaner cover. Take off the
filter elements and tap off attached sawdust. When they are
extremely dirty, shakewash with gasoline.
Dry them completely before reinstalling.
2. Oiling port
Dismount the guide bar and check the oiling port for clogging.
3. Guide bar
When the guide bar is dismounted, remove saw
dust in the bar groove and the oiling port.
<Type : sprocket nose>
Grease the nose sprocket from the feeding
port on the tip of the bar.
4. Others
Check for fuel leakage and loose fastenings and damage to major parts, especially handle joints
and guide bar mounting. If any defects are found, make sure to have them repaired before operating
the saw again.
PERIODICAL SERVICE POINTS
1. Cylinder fins
Reriodically check and clean the cylinder fins in the repair specialty store.
2. Fuel filter
(a) Using a wire hook, take out the filter from the filler port
(b) Wash the filter with gasoline.
Replace with new one if clogged with dirt completely
WARNING
When returning the filter, use a pinch not to be folded the suction pipe.
3. Oil filter
1. With a wire hook, take out the oil filter from the feeding port.
2. Wash the filter with gasoline.
WARNING
When returning the filter, use a pinch not to be folded
the suction pipe.
4. Spark plug
Clean the electrodes with a wire brush and reset the gap to
0.6 mm as necessary.
5. Sprocket
Check for cracks and for excessive wear interfering with the
chain drive. If the wear is considerable, replace it with new
one. Never fit a new chain on a worn sprocket, or a worn chain
on a new sprocket.
6. Way of the cooling air
WARNING
• The engine metal parts can burn your skin. Never touch the cylinder, muffler or ignition plug etc.
during operation or right after stopping the engine.
• Before starting the engine, check around the muffler and take off sawdust. If you do not, it will
cause the overheating and a fire. For preventing the trouble, please keep clean around the muffler.
This engine is air-cooled. Dust clogging between the inlet port of the cooling air and cylinder fins will
cause overheating of the engine. Periodically check and clean the cylinder fins in the repair
specialty store.
7. Muffler
WARNING
If you do not attach the muffler correctly, after engine starts, the muffler will be loosen and the
hightemperature exhaust gas spout. After cleaning the muffler, pay attention to fit up the muffler
according to the explanation as follows.
1. Muffler body, muffler cover and baffle will be combined correctly.
2. Be sure the gasket is not broken. If it is broken, change to the new one.
3. Before tightening the screw, rub the gross on it.
4. After making a test run, re-tighten the screw
(TORQUE: 6.9-7.8 N.m./70-80 kg-cm)
WARNING!
Right after stopping the engine, do not touch the muffler with one's bare hands. It will cause to burn
your hands. If carbon clogs between the muffler, it will cause the poor-output and the trouble in
starting. After each 100 hours, check and clean inside the muffler.
8. MAINTENANCE OF SAW CHAIN AND GUIDE BAR
Saw Chain
WARNING
It is very important for smooth and safe operation to always keep the cutters sharp.
The cutters need to be sharpened when:
• Sawdust becomes powder-like.
• You need extra force to saw in.
• The cut path does not go straight.
• Vibration increases.
• Fuel consumption increases.
Cutter setting standards:
WARNING
Be sure to wear safety gloves.
Before filing:
• Make sure the saw chain is held securely.
• Make sure the engine is stopped.
• Use a round file of proper size for the chain.
Chain type: 91PX / 25AP
File size: 5/32 in (4.0 mm)
Place the file on the cutter and push straight forward.
Keep the file position as illustrated.
After each cutter has been filed, check the depth gauge
and file it to the proper level as illustrated.
WARNING
Be sure to round off the front edge to reduce the chance of kickback or tie-strap breakage.
Make sure every cutter has the same length and edge angles as illustrated.
Guide Bar
Reverse the bar occasionally to prevent partial wear.
• The bar rail should always be square. Check for wear of the bar rail. Apply a ruler to the bar and
the out side of a cutter. If a gap is observed between them, the rail is normal. Otherwise, the bar rail
is worn. Such a bar needs to be corrected or replaced.
9. TROUBLESHOOTING GUIDE
Case 1. Starting failure
WARNING
Make sure the icing prevention system is not working.
10. DISPOSAL
• When you dispose of the machine, do not disassemble the machine.
• When you dispose of the machine, fuel, chain oil, be sure to follow your local regulations.
Case 2. Lack of power/Poor acceleration/ Rough idling
If the unit seems to need further service, please consult with an authorized service shop in your
area.
EN