Professional
Landscaping Tools
CS5720
20”
CHAIN SAW
IMPORTANT: READ SAFETY RULES AND
INSTRUCTIONS CAREFULLY
DO NOT THROW AWAY
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Section 1
Safety
The purpose of safety symbols is to attract your attention to possible dangers. The safety symbols, and their
explanations, deserve your careful attention and understanding. The safety warnings do not by themselves eliminate
any danger. The instructions or warnings they give are not substitutes for proper accident prevention measures.
SYMBOL
MEANING
SAFETY ALERT SYMBOL: Indicates danger,
warning or caution. Attention is required in
order to avoid serious personal injury. May
be used in conjunction with other symbols
or pictographs.
Failure to obey a safety warning will result in
serious injury to yourself or to others. Always
follow the safety precautions to reduce the risk of
fire, electric shock, and personal injury.
NOTE: Advises you of information or instructions
vital to the operation or maintenance of the
equipment.
Failure to obey a safety warning can result in
injury to yourself and others. Always follow the
safety precautions to reduce the risk of fire,
electric shock, and personal injury.
California Proposition 65 Warning
THE ENGINE EXHAUST FROM THIS PRODUCT
CONTAINS CHEMICALS KNOWN TO THE STATE OF
CALIFORNIA TO CAUSE CANCER, BIRTH DEFECTS
OR OTHER REPRODUCTIVE HARM.
Failure to obey a safety warning may result in property
damage or personal injury to yourself or to others.
Always follow the safety precautions to reduce the
risk of fire, electric shock, and personal injury.
Important Safety Information
READ ALL INSTRUCTIONS
Before Operating
• Carry the chain saw with the engine stopped, the
guide bar and saw chain to the rear, and the muffler
away from your body.
• When transporting your chain saw, use the
appropriate guide-bar scabbard (sheath).
If correctly used, the chain saw is a quick, easy to
handle and efficient tool; if used improperly or
without the due precautions it could become a
dangerous tool. For pleasant and safe work,always
strictly comply with the safety rules that follow and
throughout this manual.
While Operating
• Keep all parts of your body away from the chain when
the engine is running.
• Never start or run the unit inside a closed room or
building. Breathing exhaust fumes can kill. Operate
this unit only in a well ventilated outdoor area.
• Read the instructions carefully. Be familiar with the
controls and proper use of the unit.
• Wear safety glasses or goggles that are marked as
meeting ANSI Z87.1-1989 standards. Also wear
ear/hearing protection when operating this unit. Wear
a face or dust mask if the operation is dusty. Long
sleeve shirts are recommended.
• Do not operate this unit when tired, ill or under the
influence of alcohol, drugs or medication.
• Only responsible individuals who are familiar with the
instructions may operate the chain saw (no one under
the age of 16). Provide parental supervision at all times.
• Wear heavy, long pants, boots or safety footwear and
protective gloves. Do not wear loose clothing, jewelry,
short pants, sandals or go barefoot. Secure hair above
shoulder level.
• Inspect the unit before use. Replace damaged parts.
Check for fuel leaks. Make sure all fasteners are in
place and secure. Replace parts that are cracked,
chipped or damaged in any way.
• Use the unit only in daylight or good artificial light.
• Know the controls and know how to stop the chain
saw quickly.
3
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Safety (continued)
• Avoid accidental starting. Be in the starting position
whenever pulling the starter rope. The operator and
unit must be in a stable position while starting. See
Starting/Stopping Instructions.
Kickback Safety Precautions
• Before you start the engine, make sure that the saw’s
chain is not contacting anything. Do not cut near
electrical cables or power lines.
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 toward the operator. Either of these
reactions may cause you to lose control of the saw,
which could result in serious personal injury.
• Keep all parts of your body away from the chain when
the engine is running.
• Do not start cutting until you have a clear work area,
secure footing, and a planned retreat path from the
falling tree.
• Do not operate a chain saw that is damaged,
improperly adjusted, or not completely and securely
assembled. Be sure that the saw’s chain stops moving
when the throttle control trigger is released.
Do not rely exclusively upon the safety devices
built into your saw. As a chain saw user, you
should take several steps to keep your cutting
jobs free from accident or injury.
• Shut off the engine before setting the chain saw down.
• Use extreme caution when cutting small-sized brush
and saplings because slender material may catch the
chain saw and whip towards you or pull you off
balance.
• With a basic understanding of kickback, you can
reduce or eliminate the element of surprise. Sudden
surprise contributes to accidents. Be alert to the
potential for kickback at all times.
• When cutting a limb that is under tension, be alert for
springback so that you will not be struck when the
tension in the wood fibers is released
• Keep a good firm 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. Don’t let go.
• Do not cut through nails, rods in the tree, railroad ties
or pallates. Inspect a tree that you are going to cut for
foreign objects that could cause injury or damage to
your chain saw.
• After striking a foreign object, stop the engine and
thoroughly inspect for damage. Repair as necessary.
• 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, fence, or any other
obstruction that could be hit while you are operating
the saw.
• Keep the handles dry, clean and free of the oil/fuel
mixture
• We do not recommend using the chain saw in a tree or
on a ladder.
• Always cut with the engine running at full speed. Fully
squeeze the throttle trigger and maintain a steady
cutting speed.
• All chain saw service, other that the items listed in this
instruction manual maintenance instructions, should
be performed by competent chain saw service
personnel.
• Use only the correct original equipment manufacturer
replacement bars, chains and other parts and
accessories. These are available from your authorized
service dealer. Use of any unauthorized parts or
accessories could lead to serious injury to the user, or
damage to the unit, and will void your warranty.
• Use the right tool. Only use this chain saw for its
intended purpose, to cut wood.
• Do not overreach. Always keep proper footing and
balance.
• Follow the manufacturer’s sharpening and
maintenance instructions for the saw chain.
• Always hold the unit with both hands when operating.
Keep a firm grip on all handles or grips.
• Use only the replacement guide bars and low kickback
chains specified for your saw to avoid injury.
• Apply chain brake prior to any repositioning of the
operator in the cutting area. As an additional safety
precaution, apply the chain brake prior to setting down
the saw.
Other Safety Precautions
• Do not operate a chain saw with one hand! Serious
injury to the operator, helpers, bystanders, or any
combination of these persons may result from one-
handed operation. A chain saw is intended for two-
handed use.
• Never touch the chain or attempt to service the saw
while the engine is running. Make sure all moving parts
have stopped. Allow the chain saw to cool, as the
chain can be hot.
• Check the bar and chain at frequent intervals for
proper adjustment. Make sure the bar and chain are
properly tightened and sharpened. Visually inspect for
damage. Repair any damage before restarting or
operating the chain saw.
• Do not operate a chain saw if you are fatigued.
• Use safety footwear; snug-fitted clothing; protective
gloves; and eye, hearing, and head protection devices.
4
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Safety (continued)
• Use caution when handling fuel. Move the chain saw at
lest 10 feet (3 m) from the fueling point before starting
the engine.
• Store the unit in a dry area, locked up, located up high
and located out of the reach of children to prevent
unauthorized use or damage.
• Do not allow other persons to be near the chain saw
when starting or cutting with the chain saw. Keep
bystanders and animals out of the work area.
• Never douse or squirt the unit with water or any other
liquid. Keep handles dry, clean and free from debris.
Clean after each use.
• Do not remove, damage or de-activate any of the
safety devices. Never use a damaged, modified, or
improperly repaired or assembled chain saw. Check
their proper operation regularly. Only use bars and
chains of the length indicated in the table herein.
• Keep these instructions. Refer to them often and use
them to instruct other users. If you loan someone this
unit, also loan them these instructions.
• Do not use the unit in the rain, in a storm or in
inclement weather. Wait until the storm danger has
passed before operation of this product.
• Never carry out operations or repairs on your own that
are other than routine maintenance. For information,
contact specialized and authorized workshops only.
• If your chain saw is no longer usable, dispose of it
properly without damaging the environment by
handing it in to your local dealer who will arrange for its
correct disposal.
Gasoline is highly flammable, and its vapors can
explode if ignited. Take the following precautions.
• Use caution when felling a tree. Make sure you have
planned an escape path when felling, and keep all
bystanders away.
Fuel Safety
• Store fuel only in containers specifically designed and
approved for the storage of such materials.
• Be alert; stop the machine if anyone enters the cutting
area, which is usually 3 to 4 feet around the operator.
• Always stop the engine and allow it to cool before
filling the fuel tank. Never remove the cap of the fuel
tank, or add fuel, when the engine is hot. Never
operate the unit without the fuel cap securely in place.
Loosen the fuel tank cap slowly to relieve any pressure
in the tank.
• Use caution when working in a crew to avoid injury to a
fellow worker who may enter the cutting area.
• Only loan your saw to experienced users who are
completely familiar with saw operation and correct use.
Give other users this manual, which they should read
before using the saw. Provide them the operating
instructions.
• Add fuel in a clean, well-ventilated outdoor area where
there are no sparks or flames. Slowly remove the fuel
cap only after stopping engine. Do not smoke while
fueling or mixing fuel. Wipe up any spilled fuel from the
unit immediately.
• Shut off the engine before setting down the saw. Do
not leave the engine running unattended.
• Never store the unit, with fuel in the tank, inside a
building where fumes may reach an open flame or
spark.
• Avoid creating a source of ignition for spilled fuel. Do
not start the engine until fuel vapors dissipate.
• Move the unit at least 30 feet (9.1 m) from the fueling
source and site before starting the engine. Do not
smoke. Keep sparks and open flames away from the
area while adding fuel or operating the unit.
• Allow the engine to cool before storing or transporting
the chain saw over long distances. For example, let the
engine cool before placing the chain saw in an
automobile. Also, be sure to secure the unit while
transporting.
SAVE THESE INSTRUCTIONS
5
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Safety (continued)
Safety and International Symbols
This operator's manual describes safety and international symbols and pictographs that may appear on this product.
Read the operator's manual for complete safety, assembly, operating and maintenance and repair information.
SYMBOL
MEANING
SYMBOL
MEANING
• ON/OFF STOP CONTROL
• SAFETY ALERT SYMBOL
ON / START / RUN
Indicates danger, warning, or
caution. May be used in conjunction
with other symbols or pictographs.
• ON/OFF STOP CONTROL
OFF OR STOP
• WARNING - READ OPERATOR'S
MANUAL
Read the Operator’s Manual(s) and
follow all warnings and safety
instructions. Failure to do so can
result in serious injury to the
operator and/or bystanders.
• HOT SURFACE WARNING
Do not touch a hot muffler or
cylinder. You may get burned. These
parts get extremely hot from
operation. When turned off they
remain hot for a short time.
• WEAR EYE, HEARING AND
HARDHAT PROTECTION
WARNING: Thrown objects and
loud noise can cause severe eye
injury and hearing loss. Wear eye
protection meeting ANSI Z87.1-1989
standards and ear protection when
operating this unit. Wear a hard hat.
Use a full face shield when needed.
• GUIDE BAR WARNING:
Contact of the guide bar tip with any
object should be avoided. Tip
contact may cause the guide bar to
move suddenly upward and
backward, which may cause serious
injury.
• USE BOTH HANDS
• UNLEADED FUEL
Always use both hands while
operating the chain saw. Never use
only one hand to operate the saw.
Always use clean, fresh unleaded fuel.
• OIL
Refer to operator's manual for the
proper type of oil.
6
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Section 2
Know Your Unit
Chain Saw Components
1 - Choke lever
2 - Throttle trigger
3 - Throttle trigger lockout
4 - Half throttle lock
5 - Carburetor adjustment screws
6 - Inertial brake lever
7 - Exhaust muffler
8 - Chain
9 - Guide bar
10 - Air filter cover
11 - On/off switch
12 - Fuel tank cap
13 - Starter handle
14 - Oil tank cap
15 - Primer bulb
16 - Decompression valve
7
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Section 3
Fitting the Bar & Chain
1
Check the chain tension frequently when operating
the chain saw. Always use protective gloves.
With the engine off, follow the ensuing instructions:
•
Pull the guard (Fig. 1) towards the front handle to
check that the chain brake is not on.
2
•
•
Remove the bar nuts (A) and the chain cover (B, Fig. 2).
Remove and discard the plastic shim from the bar
studs (C, Fig. 3).
•
Bring the chain tensioning pin (D) fully towards the
sprocket (E) (Fig. 3) using the chain tensioning screw
(L, Fig. 5).
•
•
Place the bar (F) onto the studs so that the chain
tensioning pin (D) fits into its seat (G) (Fig. 3).
Fit the chain (H) inside the self-aligning ring of the
sprocket (E) and the bar groove (M) (Fig. 4).
3
4
8
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Fitting the Bar & Chain (continued)
•
•
•
•
Pay attention to the direction of rotation of the chain
(Fig. 6).
5
6
7
Fit the chain cover and the relative nuts without
tightening them.
Tension the chain by means of the tensioning screw
(L, Fig. 5).
Hold the tip of the guide bar up and tighten the chain
cover nuts securely (Fig. 7). The chain should be taut
but turn freely by hand (Fig. 8). Wear gloves while
accomplishing this task.
•
The chain is tensioned correctly when it can be
pulled upwards a few millimeters (Fig. 8).
8
9
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Section 4
Oil and Fuel
FUEL MIXTURE
9
Refer to the values in Figure 9.
Use a 2% (50:1) oil/gasoline mixture.
+
UNLEADED GAS
2 CYCLE OIL (2%)
1 GALLON US
(3.8 LITERS)
2.56 FL. OZ.
(76 ml)
Two-stroke engines have high specific horsepower
and we therefore recommend the use of well-
known, super gasoline, without lead and an octane
rating of no less than 90. When preparing the
mixture, only use a high quality oil designed for air-
cooled two stroke engines. Shake the fuel canister
before filling. Refill (Fig. 10) when the engine is
switched off and far away from an open flame.
Before unscrewing the fuel tank cap, position the
chain saw on a flat, solid surface to prevent fuel
spills. Only prepare the quantity of mixture for each
job, do not leave the mixture in the fuel tank or in a
fuel canister for prolonged periods.
1 LITER
20 ml
MIXING RATIO - 50:1
10
CHAIN LUBRICATING OIL
Proper chain lubrication during the cutting phase will
reduces wear to a minimum between the chain and bar.
Correctly lubricating the chain will prolonging the chain
saw’s life. Always use a good quality oil (Fig. 11). Refill
the oil reservoir each time you refill the unit with fuel.
11
Never use waste oil. Always use biodegradable
lubricant (part number em-1108014) which is
specific for bar and chain and also respectful
towards nature and the chain saw's parts.
10
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Section 5
Operation
STARTING THE ENGINE
12A
12B
1. Fill the carburetor by pushing primer bulb (A)
(Fig. 12B).
2. Put the ON/OFF switch (A, Fig. 12A) in the START
position.
3. Pressing the push button (E, Fig. 14) opens the
decompression valve. It will automatically close at
the first start. We suggest to press the push button
before every start.
4. Pull the throttle lever (B) and stop it at half-throttle by
pressing the lever (C), then releasing the lever (B).
13
5. Pull the choke lever (D, Fig. 12A).
6. Place the chain saw on the ground in a stable
position. Check that the chain is free to turn and will
not come into contact with any foreign objects.
7. Hold the front handle firmly with your left hand and
put your right foot onto the base of the rear handle
(Fig. 13). Pull the starter rope slowly until you meet
resistance, then pull it hard several times
8. When the engine starts, put the choke lever
(D, Fig. 12) back into its initial position. Repeat this
until the engine starts.
14
9. Once the engine has started, press the throttle trigger
(B, Fig. 12) to release it from the half-throttle position
and let the engine idle.
NOTE: Once the engine is warmed up, do not use the
choke to start up again.
Use the half-throttle lever and other partial
acceleration devices (from step 4) only when you
are initially starting the engine.
Operate this unit only in a well-ventilated outdoor
area. Carbon monoxide exhaust fumes can be
lethal in a confined area.
BREAKING-IN THE ENGINE
The engine break-in period is approximately 20 hours.
During this period, avoid prolonged high-speed full
throttle operation.
Avoid accidental starting. Make sure you are in the
starting position when pulling the starter rope
(Fig. 13). To avoid serious injury, the operator and
unit must be in a stable position while starting.
11
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Operation (continued)
STOPPING THE ENGINE
15
Release the throttle lever and let the engine return to idle.
(B, Fig. 15). Turn off the engine, putting the ON/OFF
switch (A) in the STOP position. Do not put the chain saw
on the ground when the chain is still moving.
BREAKING-IN THE CHAIN
New chains will stretch and must be tightened frequently.
Tension adjustment must only be made when the chain
is cool.
1. Turn the chain and lubricate it with additional oil
(Fig. 16).
16
2. Start the saw and allow it to run at moderate speed.
Check to make sure that the oil pump is working
properly (Fig. 17).
3. Stop the engine and adjust the chain tension.
4. Start the saw again and make a few cuts in the trunk
of a tree to heat up the chain.
5. Stop the engine and allow the chain to cool and
adjust again.
6. Repeat this process until the chain retains proper
tension.
17
Do not touch the ground with the chain during this
process.
Never touch or adjust the chain while the engine is
running.
12
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Section 6
Carburetor Adjustment
CARBURETOR
18
Before adjusting the carburetor, clean the starter cover
(Fig. 18), the air filter (Fig. 19) and warm up the engine.
This engine is designed and manufactured in order to
comply with the applicable Exhaust Emission Standards.
The Exhaust Emission Control System includes the
ignition system, the air inlet system and, mainly, the
carburetor.
In this engine, the carburetor (Fig. 20) is designed to
permit only the adjustment of L and H screws in a
range of half a round; the half round range admissible
for L and H screws is determined by the manufacturer
and you cannot modify it.
19
Don’t try to force the screws outside the range!
• Idle screw T is adjusted in order to ensure a good
safety margin between idle running and clutch
engagement.
• Screw L must be adjusted so that the engine promptly
responds to sharp accelerations and gives good idle
operation.
20
• Screw H must be adjusted so that the engine gives
maximum power during the cutting phase.
Weather conditions and altitude may affect carburetor
performance.
H – High speed adjustment screw
L – Low speed needle
T – Idle adjustment screw
Do not allow anyone to stay close to the chain saw
while working or while adjusting the carburetor.
13
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Section 7
Kickback
PRECAUTIONS AGAINST KICKBACK
21
Kickback is a dangerous reaction that can lead to serious
injury. Do not rely only on the safety devices provided
with your saw. As a chain saw user, you must take
special safety precautions to help keep your cutting jobs
free from accident or injury.
KICKBACK WARNINGS
Refer to Figures 21, 22, 23.
22
23
24
KICKBACK occurs when the moving chain
contacts an object at the upper portion of the tip
of the guide bar or when the wood closes in and
pinches the saw chain in the cut. Contact at the
upper portion of the tip of the guide bar can cause
the chain to dig into the object and stop the chain
for an instant. The result is a lightning fast, reverse
reaction which kicks the guide bar up and back
toward the operator. If the saw chain is pinched
along the top of the guide bar, the guide bar can be
driven rapidly back toward the operator. Either of
these reactions can cause loss of saw control
which can result in serious injury.
Do not rely exclusively upon the safety devices
built into your saw. As a chain saw user, you
should take several steps to keep your cutting jobs
free from accident or injury.
• With a basic understanding of kickback, you can
reduce or eliminate the element of surprise. Sudden
surprise contributes to accidents.
• Keep a good firm grip on the saw with both hands when
the engine is running. Place your right hand on the rear
handle and the left hand on the front handle with your
thumbs and fingers encircling the chain saw handles. A
firm grip together with a stiff left arm 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, fence, or any other obstruction
that could be hit while you are operating the saw.
• Always cut with the engine running at full speed. Fully
squeeze the throttle trigger and maintain a steady
cutting speed.
• Follow the sharpening and maintenance instructions
for the saw chain.
LOW KICKBACK SAW CHAIN
The rakers (depth gauges) (Fig. 24) ahead of each cutter
can minimize the force of a kickback reaction by
preventing the cutters from digging in too deeply at the
kickback zone. Only use replacement chain that is
equivalent to original chain or has been certified as low
kickback chain per ANSI B175.1 for your saw.
• Use only the replacement guide bars and low kickback
chains specified for your saw.
GUIDE BARS
Generally, guide bars with small radius tips have
somewhat lower kickback potentials.
The manufacturer’s gasoline saws meet the kickback-
reduction requirements of ANSI B175.1 without requiring
small radius tip bars.
Low kickback saw chain is chain that has met the
kickback performance requirements of ANSI B175.1 -
1991 (American National Standard for Power Tools -
Gasoline-Powered Chain Saws-Safety Requirements)
when tested on the representative sample of chain saws
below 3.8 c.i.d. specified in ANSI B175.1 - 1991.
14
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Kickback (continued)
RECOMMENDED BAR & CHAIN COMBINATIONS
Chains
.375”x.058”
Bar length
Bar description
Chain description
.375
490-700-0006
20”
490-700-0010
Section 8
Chain Brake
25
INERTIAL CHAIN BRAKE
The inertial chain brake ensures maximum safety when using
the chain saw. It protects the operator from dangerous
kickback which can occur during working phases.
The chain brake can be actuated in two ways. First,
when the operator presses the lever (Fig. 25) (manual
operation) the chain consequently and instantly locks.
The chain brake is also actuated automatically. This occurs
by inertia, when the protective brake is pushed forward
(Fig. 26) due to sudden kickback (inertial operation).
26
The chain brake is released by pulling the lever towards
the operator (Fig. 27).
CHECKING BRAKE OPERATION
When you inspect the machine before 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. Pull the throttle lever to maintain the chain operation,
push the brake lever down toward the front using the
back of your left hand (Fig. 25).
27
3. When the brake operates and the chain is stopped,
release the throttle lever.
4. Release the brake (Fig. 27).
BRAKE MAINTENANCE
Always keep the chain brake mechanism clean and
lubricate the lever with a small amount of oil (Fig. 28).
Check wear on the brake band often. Its minimum
thickness must be 0.60 mm (0.02”).
28
Do not use any non-comforming components. Do not
remove any saw chain safety devices.
15
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Section 9
(Felling, Limbing Bucking)
Cutting Techniques
31
30
32
OPERATING INSTRUCTIONS
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.
Always follow the safety precautions. 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; the
safety requirements and 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. Do not attach to this product
any form of after-market product, attachment or
tool that is not specifically designed or
TREE FELLING
Study the tree and surrounding area before starting to
cut. Clear the work area before beginning to cut.
Prepare the widest possible path of retreat for when the
tree falls (Fig. 29). Cut off any branches at the bottom of
the trunk up to a height of about 2 meters. Make a 45
degree notch on the face of the tree, in the direction it
will fall. The depth of the notch should never exceed 1/4
of the diameter of the trunk (1 - Fig. 30). About 10 cm
(4”) higher up the trunk make a cut down towards the
first cut, in order to extract a wedge. This is the mouth
of the hinge, and is the direction in which the tree will fall
(2 - Fig. 30).
recommended by the manufacturer.
When using the chain saw for the first time, make several
cuts in a small trunk in order to become familiar with the
saw in action. Always use full throttle when cutting with
the saw, regardless of the size of the timber. Never push
down on the saw when cutting. The weight of the saw
alone enables it to cut properly with minimum effort.
16
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Cutting Techniques (continued)
33
36
34
35
Now, make your felling cut on the opposite side of the
trunk. Start the cut about 4-5 cm (2”) higher than the
center of the notch (3 - Fig. 30).
Always leave a hinge (A, Fig. 31 and 32) which allows you
to control the direction the tree falls in. Put a wedge into
the felling cut, before the tree starts to move, to prevent
the chain saw guide bar from getting stuck.
BUCKING
When bucking up the trunk to desired lengths, there is a
basic rule to follow. Look to see where the trunk is
supported, and determine which way the two halves will
fall when cut.
If the diameter of the trunk is greater than the length of
the guide bar, make the felling cut as shown in the
sequence of Fig. 32.
Before you begin bucking, check underneath the
log and make sure the area is free from
obstructions. Also, use extreme caution when
performing bucking techniques.
LIMBING
a) Always start from the larger diameter and move towards
the tip to cut off limbs and any secondary branches.
b) Always find the safest and most stable position
before accelerating the chain saw. If necessary, keep
your balance by resting your knee on the trunk itself.
Make sure your knee is positioned far away from the
saw chain and cutting area.
a) If the trunk is supported at both ends, first make a
small cut at the top (1 - Fig. 34), then complete the
cut from the bottom (2 - Fig. 34). This will prevent the
saw from pinching.
b) If the trunk is supported at one end or near the center,
first make a small cut from underneath (1 - Fig. 35),
then complete the cut from the top (2 - Fig. 35).
c) Keep the chain saw on the trunk so as not to get too
tired, turning it onto the left- or right-hand side
depending on the position of the branch to cut (Fig. 33).
d) When branches are under tension, find a safe
position to protect yourself in case the branches
whip back. Always start the cut from the opposite
side to the bend.
If the saw becomes pinched in the trunk, stop the
engine, lift the log and change its position (Fig. 36).
Never attempt to free the saw by pulling on it.
When cross-cutting, do not use the upper edge of the
guide bar tip; use the middle portion of the bar. Using
the tip when cross-cutting may lead to kickback.
Wear eye protection during maintenance.
17
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Section 10
Maintenance
37
39
38
Always wear protective gloves and eye protection
during maintenance operations. Do not carry out
maintenance when the engine is hot.
A sharp chain produces well-defined chips. When
your chain starts to produce sawdust, it is time to
sharpen the chain.
After sharpening the cutters 3-4 times, it is important to
check the height of the depth gauges. If necessary, you
should lower them using the flat file and supplied
template, then round off the front corner (Fig. 39).
CHAIN SHARPENING
The pitch of the chain (Fig. 37) is .325”x.058” or
3/8”x.058”.
Sharpen the chain using protective gloves and a round
file of Ø 4.8 mm (3/16”) or Ø 5.5 mm (7/32”).
Proper adjustment of the depth gauge is as
important as proper sharpening of the chain.
Do not fit the .325” chain on the 3/8” pinion or vice
versa.
Always sharpen the cutters with outward strokes only
(Fig. 37), observing the values given in Fig. 38.
After sharpening, the cutting links must all have the same
width and length.
18
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Maintenance (continued)
GUIDE BAR
40
41
42
43
44
The guide bar has a sprocket at its base that must be
lubricated with grease using a lubrication syringe (Fig. 40).
Reverse the guide bar every 8 working hours to ensure
uniform wear.
Keep the bar groove and lubrication hole clean using the
bar groove cleaner (Fig. 41).
Check the bar rails frequently for wear. If they are
sufficiently worn, remove the burs and square-up the
rails using the flat file (Fig. 42).
Never mount a new chain on a worn sprocket
(Fig. 43). Wear eye protection during maintenance.
AIR FILTER
Rotate the knob (A, Fig. 44) and check the air filter (B)
each time you use the chain saw. Wash the filter in a
clean, non-flammable detergent liquid (e.g. hot soap
water), then dry.
When refitting the air filter (B), fit it into the cover
(A) before reassembly.
19
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Maintenance (continued)
FUEL FILTER
45
Check the fuel filter periodically. Replace it if it is too dirty
(Fig. 45).
OIL PUMP (automatic / adjustable)
Flow adjustment is pre-set by the manufacturer. Oil flow
can be adjusted by the operator according to specific
requirements. This is accomplished by the special
adjusting screw (Fig. 46). Oil flow occurs only when the
chain is moving.
46
47
48
49
Never use or operate with used oil.
STARTER ASSEMBLY VENT CLEANING
Use a brush or compressed air to keep the cooling
louvers of the starter assembly free and clean (Fig. 47).
ENGINE / DECOMPRESSION VALVE
Periodically clean the cylinder fins (Fig. 48) with
compressed air or a brush. Dangerous overheating of the
engine may occur due to impurities on the cylinder.
Check the base of the decompression valve; clean away
any residues, which could cause the valve to stay open.
SPARK PLUG
Clean the spark plug and check the electrode gap
periodically (Fig. 49).
Use a Champion RCJ-7Y or equivalent with the same
thermal grade.
20
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Maintenance (continued)
CHAIN BRAKE
50
Always wear safety glasses when performing
maintenance on your saw.
If the chain brake does not work properly, remove the
bar clamp (chain cover) to inspect. Clean brake
mechanism and related parts, removing woodchips,
dust, excessive oil and foreign material. Use a brush or
low volume compressed air. Inspect for excessive wear
(Fig. 50), damage to the band or actuator assembly.
Check closely for wear to the band or deformities using
the guidelines explained in Section 8 of this manual.
51
If you notice or suspect a problem with the chain braker
assembly, DO NOT use the chain saw until this is
repaired. After cleaning, test the chain brake to assure
that it works properly (explained in Section 8 of this
manual). if this chain brake does not function properly,
discontinue use until the chain brake is repaired.
Refer all chain brake service or repair to an authorized
servicing dealer.
GUIDE BAR
52
Turn the guide bar and check that the lubrication holes
are free from impurities (Fig. 51).
SPARK ARRESTOR
The chain saw is provided with a Spark Arrester System
(part number em-50012092) (Fig. 52) complying with the
requirements of SAE J335 standard.
For compliance with the standard, two spiked bumpers
(part number em-50010050A) (Fig. 53) have to be
mounted, as provided on the chain saw in the box.
The Spark Arrester System needs periodic and accurate
maintenance and cleaning:
53
• Periodically check the spark arrester screen and
substitute it when holes, bends or deformations
appear
• Carefully check to see if dust, debris or organic
material is in contact with portions of the Spark
Arrester System. In particular, check the gap between
the muffler and the shield. Clean this often with tools or
shop air.
21
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Section 11
Specifications
ENGINE*
Engine Type.......................................................................................................................................... Air-Cooled, 2-Cycle
Displacement ......................................................................................................................................................... 56.5 cm3
Power......................................................................................................................................................................... 3.1 kW
Clutch Type ......................................................................................................................................................... Centrifugal
Minimum RPM (no load RPM with bar and chain) ................................................................................... 2500 - 2800 min–1
Maximum RPM (no load RPM with bar and chain) ............................................................................. 13000 - 13500 min–1
Ignition Type.......................................................................................................................................................... Electronic
Ignition Switch ............................................................................................................................................... Rocker Switch
Spark Plug Gap......................................................................................................................................... 0.02 in. (0.5 mm)
Lubrication................................................................................................................................................... Fuel/Oil Mixture
Fuel/Oil Ratio.................................................................................................................................................................. 50:1
Carburetor....................................................................................................................................... Diaphragm, All-Position
OTHER SPECIFICATIONS*
Number of Pinion Teeth ...................................................................................................................................................... 7
Approximate Unit Weight (without bar and chain)...................................................................................................... 5.5 Kg
Anti-vibration System ..................................................................................................................................................... Yes
Inertial Chain Brake ........................................................................................................................................................ Yes
Decompression Valve .................................................................................................................................................... Yes
*All specifications are based on the latest product information available at the time of printing. We reserve the right to
make changes at any time without notice.
22
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EPA Emission Control Warranty Statement
Your Warranty Rights and Obligations
The Environmental Protection Agency and Cub Cadet LLC (Cub Cadet) are pleased to explain the emission control
system warranty on your 2002 and later small off-road engine. New small off-road engines must be designed, built and
equipped to meet stringent anti-smog standards. Cub Cadet must warrant the emission control system on your small
off-road engine for the periods of time listed below provided there has been no abuse, neglect or improper maintenance
of your small off-road engine.
Your emission control system may include parts such as the carburetor or fuel-injected system, the ignition system, and
catalytic converter. Also included may be hoses, belts, connectors and other emission-related assemblies.
Where a warrantable condition exists, Cub Cadet will repair your small off-road engine at no cost to you including
diagnosis, parts and labor.
The 2002 and later small off-road engines are warranted for two years. If any emission-related part on your engine is
defective, the part will be repaired or replaced by Cub Cadet.
Owners Warranty Responsibilities
• As the small off-road engine owner, you are responsible for the performance of the required maintenance listed in your
operator’s manual. Cub Cadet recommends that you retain all receipts covering maintenance on your small off-road
engine, but Cub Cadet cannot deny warranty solely for the lack of receipts or for your failure to ensure the performance
of all scheduled maintenance.
• As the small off-road engine owner, you however should be aware that Cub Cadet may deny you warranty coverage if
your small off-road engine or a part has failed due to abuse, neglect, improper maintenance or unapproved
modifications.
• You are responsible for presenting your small off-road engine to a Cub Cadet Authorized Service Center as soon as a
problem exists. The warranty repairs should be completed in a reasonable amount of time, not to exceed 30 days.
If you have any questions regarding your warranty rights and responsibilities, you should call 1-877-282-8684.
Manufacturer’s Warranty Coverage
• The warranty period begins on the date the engine or equipment is delivered to the retail purchaser.
• The manufacturer warrants to the initial owner and each subsequent purchaser, that the engine is free from defects in
material and workmanship which cause the failure of a warranted part for a period of two years.
• Repair or replacement of warranted part will be performed at no charge to the owner at an Authorized Cub Cadet
Service Center. For the nearest location please contact Cub Cadet at: 1-877-282-8684.
• Any warranted part which is not scheduled for replacement, as required maintenance or which is scheduled for only
for regular inspection to the effect of “Repair or Replace as Necessary” is warranted for the warranty period. Any
warranted part which is scheduled for replacement as required maintenance will be warranted for the period of time up
to the first scheduled replacement point for that part.
• The owner will not be charged for diagnostic labor which leads to the determination that a warranted part is defective,
if the diagnostic work is performed at an Authorized Cub Cadet Service Center.
• The manufacturer is liable for damages to other engine components caused by the failure of a warranted part still
under warranty.
• Failures caused by abuse, neglect or improper maintenance are not covered under warranty.
• The use of add-on or modified parts can be grounds for disallowing a warranty claim. The manufacturer is not liable to
cover failures of warranted parts caused by the use of add-on or modified parts.
• In order to file a claim, go to your nearest Authorized Cub Cadet Service Center. Warranty services or repairs will be
provided at all Authorized Cub Cadet Service Centers.
• Any manufacturer approved replacement part may be used in the performance of any warranty maintenance or repair
of emission related parts and will be provided without charge to the owner. Any replacement part that is equivalent in
performance or durability may be used in non-warranty maintenance or repair and will not reduce the warranty
obligations of the manufacturer
• The following components are included in the emission related warranty of the engine, air filter, carburetor, primer, fuel
lines, fuel pick up/ fuel filter, ignition module, spark plug and muffler.
23
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MANUFACTURER’S LIMITED WARRANTY FOR:
No implied warranty, including any implied warranty of
The limited warranty set forth below is given by Cub Cadet
Commercial LLC with respect to new merchandise
purchased and used in the United States, its possessions
and territories.
merchantability or fitness for a particular purpose,
applies after the applicable period of express written
warranty above as to the parts as identified. No other
express warranty or guaranty, whether written or oral,
except as mentioned above, given by any person or
entity, including a dealer or retailer, with respect to any
product shall bind Cub Cadet Commercial LLC During
the period of the Warranty, the exclusive remedy is
repair or replacement of the product as set forth
above. (Some states do not allow limitations on how long
an implied warranty lasts, so the above limitation may not
apply to you.)
Cub Cadet Commercial LLC warrants this product against
defects in material and workmanship for a period of two (2)
years commencing on the date of original purchase and
will, at its option, repair or replace, free of charge, any part
found to be defective in material or workmanship. This
limited warranty shall only apply if this product has been
operated and maintained in accordance with the Operator’s
Manual furnished with the product, and has not been
subject to misuse, abuse, commercial use, neglect,
accident, improper maintenance, alteration, vandalism,
theft, fire, water or damage because of other peril or natural
disaster. Damage resulting from the installation or use of
any accessory or attachment not approved by Cub Cadet
Commercial LLC for use with the product(s) covered by this
manual will void your warranty as to any resulting damage.
This warranty is limited to ninety (90) days from the date of
original retail purchase for any Cub Cadet Commercial
product that is used for rental or commercial purposes, or
any other income-producing purpose.
The provisions as set forth in this Warranty provide the
sole and exclusive remedy arising from the sales. Cub
Cadet Commercial LLC shall not be liable for incidental
or consequential loss or damages including, without
limitation, expenses incurred for substitute or
replacement lawn care services, for transportation or
for related expenses, or for rental expenses to
temporarily replace a warranted product. (Some states
do not allow limitations on how long an implied warranty
lasts, so the above limitation may not apply to you.)
In no event shall recovery of any kind be greater than the
amount of the purchase price of the product sold.
Alteration of the safety features of the product shall void
this Warranty. You assume the risk and liability for loss,
damage, or injury to you and your property and/or to
others and their property arising out of the use or misuse
or inability to use the product.
HOW TO OBTAIN SERVICE: Warranty service is
available, WITH PROOF OF PURCHASE THROUGH
YOUR LOCAL AUTHORIZED SERVICE DEALER. To
locate the dealer in your area, visit our website at
www.cubcadetcommercial.com, check for a listing in the
Yellow Pages, call 1-877-282-8684 or write to P.O. Box
361131, Cleveland, OH 44136-0019
.
This limited warranty shall not extend to anyone other than
the original purchaser, original lessee or the person for
whom it was purchased as a gift.
How State Law Relates to this Warranty: This warranty
gives you specific legal rights, and you may also have
other rights which vary from state to state.
This limited warranty does not provide coverage in
the following cases:
A. Tune-ups - Spark Plugs, Carburetor Adjustments,
Filters
B. Wear items - Bump Knobs, Outer Spools, Cutting
Line, Inner Reels, Starter Pulley, Starter Ropes, Drive
Belts
To locate your nearest service dealer dial 1-877-282-8684.
C. Cub Cadet Commercial LLC does not extend any
warranty for products sold or exported outside of the
United States of America, its possessions and
territories, except those sold through Cub Cadet
Commercial’s authorized channels of export
distribution.
Cub Cadet Commercial LLC
P.O. Box 361131
Cleveland, OH 44136-0019
Cub Cadet Commercial LLC reserves the right to change
or improve the design of any Cub Cadet Commercial
Product without assuming any obligation to modify any
product previously manufactured.
P/N 769-00749 (7/03)
PRINTED IN USA
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