SGS 62CC User manual

FOR YOUR SAFETY
PLEASE READ THESE INSTRUCTIONS CAREFULLY
AND RETAIN THEM FOR FUTURE USE.
OWNER’S MANUAL
20’’ 62CC CHAINSAW

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1. FOR SAFE OPERATION
Read operator’s instruction book before
operating this machine.
Read, understand and follow all warnings.
Wear head, eye and ear protection.
Wear suitable protective clothing for your
safety.
Always use the chain saw with two hands.
Warning! Danger of kickback.
This saw is for trained tree service
operators only.
1. For Safe Operation 3 - 8
2. Kick Back Prevention 9 -10
3. Protecting Yourself From Vibration 12
4. Explanation of Symbols on the Machine 13
5. Component Diagram 14 - 15
6. Installing Guide Bar and Saw Chain 16 - 19
7. Fuel and Chain Oil 20 - 25
8. Operating the Engine 25 - 28
9. Transporting the chainsaw 30
10. Maintenance 31 - 36
11. Maintenance of Saw Chain and Guide Bar 37 - 40
12. Troubleshooting Guide 41 - 42
13. Specifications 43
14. Certificate of Conformity 44
CONTENTS

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1. FOR SAFE OPERATION
Always use caution when handling fuel.
Wipe up all spills and then move the
chain saw 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.
Do not smoke while handling fuel or while
operating the chain saw.
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.
Never start cutting until you have a clear
work area, secure footing, and a planned
retreat path from falling trees.
Always hold the chain saw firmly with both
hands when the engine is running. Use
a firm grip with thumb and fingers encir-
cling the chain saw handles.
1. WARNING
WARNING!
RISK OF DAMAGING HEARING
Wear head, eye and ear protection
1. FOR SAFE OPERATION
This chainsaw has been especially designed for
tree maintenance and should therefore only be
used by trained operators when working on trees.
Never operate a chain saw when you are
fatigued, ill, upset, or under the influence of
alcohol, drugs or medication.
Use safety footwear, snug fitting clothing
and eye, hearing and head protection devic-
es. Use a vibration-proof glove.
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.

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1. FOR SAFE OPERATION
All chain saw service, other than the items
listed in the Owner’s Manual, should be per-
formed 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 subse-
quently cause the flywheel to disintegrate.)
Always shut off the engine before setting it
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.
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 are released.
Never cut in high wind, bad weather, when
visibility is poor or in very high or low tem-
peratures. Always check the tree for dead
branches which could fall during felling
operations.
Keep the handles dry, clean and free
of oil or fuel mixture.
Keep all parts of your body away from
the saw chain when the engine is running.
Before you start the engine, make
sure the saw chain is not touching
anything.
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.
Always inspect the chain saw before each
use for worn, Ioose, or damaged parts.
Never 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 throttle
control trigger is released.
1. FOR SAFE OPERATION

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2. KICKBACK PREVENTION
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 opera-
tor.
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- such as:
-Steady, methodical work
-Proper revision of this manual
-Good dilligance
-A clear visual of your work area
1. FOR SAFE OPERATION
( 2 )
Operate the chain saw only in well ventilated
areas. Never start or run the engine inside
a sealed room or building. Exhaust fumes
contain dangerous carbon monoxide, and
can kill easily.
Do not operate the chain saw in a tree at
height unless specially trained to do so.
Guard against kickback. Kickback is the up-
ward 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.
When transporting your chain saw, make
sure the appropriate guide bar scabbard is
in place.
Never touch the muffler 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.
(1) muffler guard
(2) guide bar
(3) saw chain
ENF
EPF
( 2 )
(1) muffler guard
(2) guide bar
(3) saw chain
ENF
EPF
( 1 )

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2. CHAIN BRAKE
2. KICKBACK PREVENTION
With a basic understanding of kickback
you can reduce or eliminate the element
of surprise. Sudden surprise contributes to
accidents.
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.
Make sure that the area in which you are
cutting is free from obstructions. Do not
let the nose of the guide bar contact a log,
branch, or any other obstruction which
could be hit while you are operating the
saw.
Cut at high engine speeds.
Do not overreach or cut above shoulder
height.
Follow the manufacturer’s sharpening and
maintenance instructions for the saw chain.
Only use replacement bars and chains
specified by SGS Engineering.
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 a “click” sound is heard.
How to confirm:
1) Turn off 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.
Be sure to confirm brake operation during
daily inspection.
WARNING

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4. EXPLANATION OF SYMBOLS ON THE MACHINE
The port to refuel “MIXED PETROL”
Position: Fuel cap
The port to top up chain oil
Position: Oil cap
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 illustrated.
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 re-
leased (white arrow) and activated (black arrow).
Position: Front of the chain cover
Setting the switch to the “O” position, the engine
stops immediately.
Position: Front at the top of the rear handle
3. PROTECTING YOURSELF FROM VIBRATION
Please observe the following in order to protect yourself from
excessive vibration.
1. Always use the right tool for each job to lessen exposure to
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
taking regular breaks.
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

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5. COMPONENTS LOCATION DIAGRAM 5. COMPONENTS LOCATION DIAGRAM
Chain brake
Chain
bar
Trigger
operation
Chain
Pull
start
Front
Handle Chain
tensioner
Handling
bar
Chain brake
Chain
bar
Chain

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6. INSTALLING GUIDE BAR & SAW CHAIN
Power unit
Bar protector
Guide bar
Saw chain
Screwdriver for
carburettor
adjustment
Plug
wrench
Open the box and install the guide bar and the saw
chain on the power unit as follows:
1. Pull the chain brake towards the front handle to check that
the chain brake is not engaged. You’ll know you’ve done
this sucessfully as the chain brake will move back and forth
(15mm) with very little effort.
2. Unbolt the brake plate (the opposite side of the pull mecha-
nism) with the provided plug wrench. Remove the two bolts
and the brake plate to reveal the drive gear.
4. Take the guide bar and place it over the two exposed bolts
on the power unit. Slide the bar as close to the drive gear as
possible.
6. Now, with the chain in place, pull the end of the bar away
from the chainsaw to add tension and tighten the chain to
the bar. Be careful to ensure the chain is still aligned within
the groove of the bar, all the way around.
5. To fit the chain; wrap the chain around the drive gear and
carefully drape it over the top of the guide bar. The teeth of
the chain face outwards. There’s a small chain marking on
the chain bar which will help you position the chain in the
right direction. Make sure the prongs in the bottom of the
chain are in the goove of the guide bar.
The saw chain has very sharp edges. Use
thick protective gloves for safety.
Mounting screws
WARNING
6. INSTALLING GUIDE BAR & SAW CHAIN
3. Install the bump spike
to the power unit. The
bump spike will be with
two small bolts in your
toolkit.
Pay attention to the correct direction of the
saw chain.
The chain brake can
be very stiff. You may
find it easier to pull
back with the plate
removed and held
between your feet.
ZZ NOTE
ZZ NOTE

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6. INSTALLING GUIDE BAR & SAW CHAIN
1) Hole
2) Tensioning pin
3) Brake plate
6. INSTALLING GUIDE BAR & SAW CHAIN
A new chain will expand its length from the start of its use.
Check and readjust the tension frequently as a loose chain
can easily derail or cause rapid wear of itself and the guide
bar.
ZZ NOTE
7. Position the brake plate back in the right place and reattach
it to finger tightness.
8. If the side plate won’t move back into position, make sure
that the tensioning pin is aligning with with the hole in the
bar. You can adjust the position of the pin by gently pulling
it while you twist the tension screw.
9. While holding up the tip of the bar, adjust the chain tension
by turning the tensioning screw. To ensure the chain fits cor-
rectly on the chain bar, pull gently up and down and adjust
the tension screw until the chain can barely be moved away
from the chain bar.
10. Tighten the nuts securely with the bar tip held up (12 ~ 15
N·m). Then check the chain for smooth rotation and proper
tension by moving with your hand. If necessary, readjust with
the chain cover loose.
1) Tensioning screw
2) Loosen
3) Tighten

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7. FILLING WITH OIL AND FUEL
Petrol is flammable. Avoid smoking or bringing
any flame or sparks near fuel. Always ensure 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 engine is specially designed for air-cooled two stroke
petrolfuel mixture.
• Do not use BIA or TCW (2-stroke water-cooling type)
mixed oil.
RECOMMENDED
MIXING RATIO
PETROL 25 : OIL 1
WARNING
7. FILLING WITH OIL AND FUEL
• These engines are certified to operate on unleaded petrol.
• If you use a petrol 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, the octane of the unleaded petrol fuel
should be of a level between 95 and 97 octane.
• Poor quality petrol or oils may damage sealing
rings, fuel lines or fuel tank of the engine.

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7. FILLING WITH OIL AND FUEL
HOW TO MIX FUEL
1. Measure out the quantities of petrol and oil to be mixed.
2. Put some of the petrol into a clean, approved fuel
container.
3. Pour in all of the oil and agitate well.
4. Pour in the rest of petrol 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 work properly. Be careful that, if the agitation is in-
sufficient, 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 petrol or other containers.
6. Indicate the contents on outside of container for easy
identification.
7. FILLING WITH OIL AND FUEL
FUELING THE UNIT
1. Untwist and remove the fuel cap. Rest the cap on a dust-
less 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.
1. Select bare ground for fueling.
2. Move at least 10 feet (3 metres) away from the fueling point
before starting the engine.
3. Stop the engine before refueling the unit. Be sure to suffi-
ciently agitate the mixed fuel in the container.
WARNING

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7. FILLING WITH OIL AND FUEL
FOR YOUR ENGINE LIFE, AVOID:
1. FUEL WITH NO OIL (RAW PETROL) – 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-STROKE 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, start the engine and empty the carburetor of the
composite fuel.
6. When scrapping the used mixed oil container, scrap only
at an authorized repository site.
CHAIN OIL
Running the equipment for long hours with its chain oil empty
will accelerate the wear and tear of the chain and guide bar,
possibly resulting in chain failure and even in a fatal accident
leading to death.
Use only approved chain oil.
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.
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 for the chain oil to
become viscous at the tip.
7. FILLING WITH OIL AND FUEL
WARNING
IMPORTANT

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It is very dangerous to run a chainsaw with broken or missing
parts. Before starting the 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.
8. STARTING THE ENGINE
2) Fuel
1) Chain oil
2. Set the switch to “I” position.
Switch
Choke
3. Pull out the choke to the closed position.
WARNING
8. STARTING THE ENGINE
When restarting immediately after stopping
the engine, leave the choke knob at the open
position.
5. While holding the saw unit securely on the ground, pull the
starter rope vigorously.
4. Press the primer until fuel is visible.
6. When engine has startered, push in the choke to the
first-stage position.
7. Allow the engine to warm up with the throttle lever pulled
slightly.
ZZ NOTE

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8. CHECKING CHAINSAW OIL LEVEL
• Make sure to set up the bar and the chain when checking
the oil supply.
• If not, rotating parts may be exposed. This is very
dangerous.
1. After starting the
engine, run the chainsaw at
medium speed and see if
chain oil is scattered off as
shown in the figure.
2. 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.
MAX
MIN
WARNING
ZZ NOTE
8. ADJUSTING THE 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:
Adjust the carburetor with the bar chain attached.
1) L needle
2) H needle
3) Idle adjusting screw
1. H and L needles should only be turned 1/4 at a time.
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.
ZZ NOTE

9. TRANSPORTING THE CHAINSAW
Always stop the engine before putting a chainsaw
down or carrying it. Carrying a chainsaw with the
engine running is extremely dangerous.
Accidental acceleration of the engine can cause the
chain to rotate.
During operation, the muffler and the material
around it reach extremely high temperatures. Avoid
touching the hot muffler, as you could receive seri-
ous burns.
By hand: When carrying your saw by hand, the
engine must be stopped and the saw must be in the
proper position. Grip the front handle and place the
muffler away from the body.
The chain guard (scabbard) should be over the chain
and the guide bar, which should point backwards.
When carrying your saw, the bar should be behind
you.
By vehicle: When transporting in a vehicle, keep
chain and bar covered with the chain guard. Properly
secure your saw to prevent turnover, fuel spillage
and damage to the saw.
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10. CHAINSAW MAINTENANCE (AFTER EACH USE)
Before cleaning, inspecting or repairing the chainsaw, make
sure that the engine has stopped and is cool.
Disconnect the spark plug to prevent accidental starting.
1. Air filter
Loosen the knob and remove the air cleaner cover. Take off the
filter elements and tap off any sawdust. When they are ex-
tremely dirty, rinse vigurously with petrol. Dry them
completely before reinstalling.
2. Oiling port
Dismount the guide bar and check the oiling port for clogging.
To assemble the cleaner halves, press the rim until it clicks.
Oiling port
WARNING

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3. Guide bar
When the guide bar is dismounted, remove sawdust in the bar-
groove and the oiling port. Grease the nose sprocket from the
feeding port on the tip of the bar.
10. CHAINSAW MAINTENANCE (AFTER EACH USE)
4. Others
Check for fuel leakage and loose fastenings and damage to
major parts.
5. Sprocket
Check for cracks and for excessive wear interfering with the
chain drive. If the wear is considerable, replace it with a new
sprocket and chain. Never fit a new chain on a worn sprocket,
or a worn chain on a new sprocket.
Grease port
Sprocket
Oiling port
10. PERIODICAL SERVICE POINTS
2. Oil tank
With a wire hook, remove the oil filter from the
feeding port. Wash the filter with petrol.
1. Cylinder fins
Periodically check and clean the cylinder fins.
Dust clogging between the cylinder fins will cause overheat-
ing of the engine. Periodically check and clean the cylinder
fins after removing the air cleaner and the cylinder cover.
When installing the cylinder cover, make sure that switch
wires and grommets are positioned correctly in place.
Be sure to unblock the air intake hole.
Oil
filter
Take care not to fold the suction pipe.
ZZ NOTE
WARNING

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4. Spark plug
Clean the electrodes with a wire brush and reset the gap to 0.65
mm if necessary.
10. PERIODICAL SERVICE POINTS
3. Fuel filter
Using a wire hook, remove the filter from the filler port.
Wash the filter with spirits. Replace with a new filter if
clogged with dirt completely.
Take care not to fold the suction pipe.
WARNING
10. PERIODICAL SERVICE POINTS
6. Chainsaw air cooling
This chainsaw engine is air-cooled. Dust clogging between the
inlet port of the cooling air and cylinder fins will cause over-
heating of the engine. Periodically check and clean the cylin-
der fins in this part of the chainsaw.
• The engine 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
clean any sawdust. If you do not, it will cause overheating and
a possible fire. To prevent this, please keep it clean around the
muffler.
If you do not attach the muffler correctly, when running the
engine, the muffler will be loose and the exhaust gases can es-
cape at a much higher temperature than usual. After cleaning
the muffler, pay attention to fit the muffler
according to the explanation as follows on page 43.
WARNING

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10. CHAINSAW MAINTENANCE (PERIODICALLY)
1. Muffler body, muffler cover and baffle should be com-
bined correctly.
2. Be sure the gasket is not broken. If it is broken, replace
with a new one.
3. After making a test run, re-tighten the screw (TORQUE:
6.9-7.8 N.m./70-80 kg-cm)
Do not touch the muffler right after the
engine has stopped, to prevent burns and
injury.
If carbon clogs the muffler, it will cause poor output and
trouble starting. After every 100 hours of use, check and clean
inside the muffler.
WARNING
11. MAINTENANCE OF SAW CHAIN AND GUIDE BAR
Saw Chain
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 to apply extra force to the chainsaw.
• The cut path does not go straight.
• Vibration increases.
• Fuel consumption increases.
Cutter setting standards
Be sure to wear safety gloves!
Before filing:
• Make sure the saw chain is held securely.
• Make sure the engine has stopped.
• Use a round file of proper size for the chain.
WARNING
WARNING

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Place the file on the cutter and push straight forward.
Keep the file position as illustrated.
11. MAINTENANCE OF SAW CHAIN AND GUIDE BAR
After each cutter has been filed, check the depth gauge
and file it to the proper level as illustrated.
Appropriate
gauge checker
Make the shoulder
round
Depth gauge standard
11. MAINTENANCE OF SAW CHAIN AND GUIDE BAR
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.
Cutter length
Filing angle
Side plate angle
Top plate angle
WARNING