OWNER’S OPERATING MANUAL
PETROL CHAIN SAW
MODEL CS-4016/CS-4518/ES-4520
SPECIFICATIONS
Model CS-4016
Max cutting length
Engine power
Engine type
380mm
2 stroke 40cc 2 stroke 45cc 2 stroke 45cc
CS-4518 ES-4520
455mm
air cooling single cylinder
500mm
Rated output power
Maximum engine speed
Fuel mixing ratio
Fuel tank capacity
Oil tank capacity
Nett weight
1.6kW 1.8kW 1.8kW
10000min
25:1
580 ml
250 ml
6.8kg6.35kg 7kg
-1
THANK YOU FOR BUYING A RYOBI
GASOLINE CHAIN SAW
Your new petrol chain saw has been engineered and manufactured to
Ryobi’s high standard of dependability, ease of operation and operator safety.
Properly cared for, it will give you years of rugged, trouble free performance. If
you use your petrol chain saw properly and only for what it is intended, you
will enjoy years of safe, reliable service.
CAUTION: Carefully read through this entire owner’s
manual, paying close attention to the general
safety rules and rules for safe operation,
before using.
KEEP THIS MANUAL FOR FUTURE REFERENCE
1
GENERAL SAFETY RULES
The purpose of safety rules is to attract your
ttention to possible dangers. The safety symbols
a
and the explanations with them, require your
areful attention and understanding. The safety
c
arnings do not by themselves eliminate any
w
danger. The instruction or warnings they give are
not substitutes for proper accident prevention
measures.
SAFETY ALERT SYMBOL. Indicates
caution or warning. May be used in
conjunction with other symbols or
pictures.
Failure to obey a safety warning can 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.
Do not attempt to operate this tool until you have
read thoroughly and completely understood the
safety rules, etc. contained in this manual. Failure
to comply can result in accidents involving fire,
electric shock or serious personal injury. Save this
Owners Operating Manual and review it frequently
for continual safe operation and for instructing
others who may use this tool.
The operation of any tool
can result in foreign objects
being thrown into your
eyes, which can result in
severe eye damage.
tool operation, always wear safety goggles or
safety glasses with side shields and a full face
shield when needed. We recommend Wide
Vision Safety Mask for use over eye glasses or
standard safety glasses with side shields.
Before beginning power
Due to continued product
refinement policy, product features
and specifications can and will
change without notice. Check
current features and specifications
with your retailer.
GENERAL REQUIREMENTS
. The saw is specially designed for tree service,
1
i.e. for off-ground working in trees, and when
eing used as such should only be used by
b
rained operators.
t
2. One handed operation of the saw can be
dangerous.
3. Be alert for the phenomena “skating” and
“bouncing”, greater risk from kickback.
4. Be cautious not to lose balance of your body
due to “drop” at the end of a cut.
5. If working off the ground the operator must be
trained in safe climbing techniques and use all
recommended safety equipment such as
harness, loops, strops, ropes and karabiners
for themselves and for the saw.
6. When hoisting a chain saw using a rope tied to
a lifting hook for operation on a tree, ensure
that the lifting hook is not strained by excessive
force.
PHYSICAL CONDITION
1. Do not operate a chain saw when you are tired
or under the influence of alcohol or drugs.
2. You should be in good physical and mental
health in order to handle your chain saw safely.
Errors in judgment or execution can be serious
or fatal. If you have any physical condition
which strenuous work could worsen, check with
your physician before using a chain saw. Do
not operate when ill or tired, or under the
influence of any substance or medication which
could affect your vision, dexterity or judgement.
PERSONAL PROTECTIVE EQUIPMENT (PPE)
1. Always wear approved goggles to protect your
eyes. Wood chips, dust, snapping branches
and other debris can be tossed by the cutting
chain into the operator’s facial area. Goggles
may also offer limited protection in the event of
the cutting chain hitting the operator in the eye
area. If conditions warrant that a ventilated face
shield should be worn, goggles must be worn
underneath it.
2. We recommend wearing hearing protection at
all times. If not followed, hearing loss can
occur. You should reduce the risk of hearing
damage by wearing either “headset” type
protectors or ear plugs which are approved by
an authorised organisation.
3. All persons who make part of their living using
chain saws should be tested periodically for
hearing deterioration.
2
GENERAL SAFETY RULES
CAUTION. Stuffing ears with cotton is
not recommended
4. Always wear a cap or hat when working with a
chain saw. A safety hard hat is highly
recommended when felling or working under
trees, or when objects can fall on you.
5. Wear heavy duty, non-slip gloves for improved
grip, and also for protection against cold and
vibration.
6. Safety tip shoes or boots with non-slip sole
should be worn.
7. Use eye protection and protective clothing,
including gloves and
tree climbing.
8. Never wear loose clothing, unbuttoned jackets,
flared sleeves and cuffs, scarfs, tie-strings,
neckties, cords, chains, jewelry, etc. which
could snag the saw chain or underbrush.
9. Clothing should be sturdy, protective material. It
should be snug-fitting to resist snagging, but
roomy enough for freedom of movement.
10. Trouser legs should not be flared or cuffed, and
should be either tucked into the boot tops or
trimmed short.
11. Safety vests, leg chaps and logger’s pants of
heavy leather material are available.
12. It is the operator’s responsibility to wear such
additional protection if conditions warrant it.
13. Never operate a chain saw when you are
alone. Arrange to have someone remain within
calling distance in case you need help.
FUEL
WARNING. Petrol and fuel are extremely
flammable. If spilled or ignited by ignition
source, it can cause fire and serious
injury or property damage. E
is required, when handling petrol or fuel.
foot protection suitable for
xtra caution
1. Use an appropriate typefuel container .
2. Do not smoke or bring flame or sparks near fuel
supplies.
3. The fuel tank may be under pressure. Always
loosen the fuel cap and wait for pressure to be
equalized before removing the cap.
4. When fuel tank cap or oil tank cap is difficult to
remove by hand, place the attached socket
wrench into the groove of cap and turn it
anticlockwise.
5. Fill the fuel tank outdoors over bare ground and
ins
tall the fuel cap securely. Do not pour fuel
indoors.
6. Wipe any spilled fuel off the unit.
7. Never refuel while the engine is still hot, or fuel
a running engine.
8. Do not store the unit with fuel in its tank,
because a fuel leak could start a fire.
9. Bring an extinguisher or shovel in case of fire.
Despite the precautions which can be taken,
operating a chain saw, or just working in the
forest, presents dangers.
10. After refueling, tighten fuel cap firmly and check
for leakage. I
before starting operation since there is a
danger of fire.
n case of fuel leakage, repair
NOTE. Do not press socket wrench
forcefully, since tank cap is plastic.
Pressing forcefully can damage tank
cap. If tank cap is damaged, do not start
engine.
RULES FOR SAFE OPERATION
STARTING ENGINE
1. Move the chain saw at least 3m from the
fuelling point before starting the engine.
2. Do not allow other persons to be near the chain
saw when you are starting or cutting with the
chain saw. Keep bystanders and animals out of
the work area. Do not let anyone hold wood for
you to cut.
3. Do not start cutting until you have a clear work
area, secure footing, and a planned retreat
path from the falling tree.
4. Before you start the engine, make sure that the
saw chain is not in contact with any object.
5. Keep the handles dry, clean, and free of oil or
fuel mixture.
3
RULES FOR SAFE OPERATION
6. Operate the chain saw only in well ventilated
reas. Exhaust gas, oil mist (from chain saw
a
lubrication) or saw dust is harmful to health.
. Starting must always be done with the chain
7
aw break deactivated - in off position.
s
8. When starting the chain saw place the unit on a
flat ground and hold the front handle with left
hand and firmly hold the rear end or rear
handle with right knee and pull starter handle
with right hand.
WARNING. Do not drop start the chain
saw, drop start chain saw in an insecure
position can result in injury. Start the
chain saw in a correct manner.
TRANSPORTATION
1. When transporting your chain saw, use the
appropriate guide bar cover.
2. Carry the chain saw with the engine stopped,
the guide bar and saw chain to the rear, and
the silencer away from your body.
KICKBACK SAFETY PRECAUTIONS
WARNING. Avoid kickback which can
result in serious injury. Kickback is the
backward, upward or sudden forward
motion of the guide bar occuring when
the saw chain near the upper tip of the
guide bar contacts any object such as a
log or branch, or when the wood closes
in and pinches the saw chain in the cut.
Contacting a foreign object in the wood
can also result in loss of chain saw
control.
1. Rotational kickback can occur when the moving
chain contacts an object at the upper tip of the
guide bar. This contact can cause the chain to
dig into the object, which stops the chain for an
instant. The result is a lightning fast, reverse
reaction which kicks the guide bar up and back
towards the operator.
2. Pinch-kickback can occur when the wood
closes in and pinches the moving saw chain in
the cut along the top of the guide bar and the
saw chain is suddenly stopped. This sudden
stopping of the chain results in a reversal of the
chain force used to cut wood and causes the
saw to move in the opposite direction of the
chain rotation. The saw is driven straight back
towards the operator.
3. Pull-in can occur when the moving chain
contacts a foreign object in the wood in the cut
along the bottom of the guide bar and the saw
hain is suddenly stopped. This sudden
c
stopping pulls the saw forward and away from
he operator and could easily cause the
t
perator to lose control of the saw.
o
EDUCE THE CHANCE OF KICKBACK
R
1. Recognise that kickback can happen. With a
basic understanding of kickback, you can
reduce the element of surprise which
contributes to accidents.
2. Never let the moving chain contact any object
at the tip of the guide bar.
3. Keep working area free from obstructions such
as other trees, branches, rocks, fences,
stumps, etc. Eliminate or avoid any obstruction
that your saw chain could hit while cutting.
4. When cutting a branch, do not let the guide bar
contact another branch or other objects around
it.
5. Keep saw chain sharp and properly tensioned.
A loose or dull chain can increase the chance
of kickback. Follow manufacturer’s chain
sharpening and maintenance instructions.
Check tension at regular intervals, but never
with engine running. Make sure chain brake
nuts are securely tightened.
6. Begin and continue cutting at full speed. If the
chain is moving at a slower speed, there is
greater chance of kickback occuring.
7. Use extreme caution when reentering a cut.
8. Do not attempt cuts starting with the tip of the
bar (plunge cuts).
9. Watch for shifting logs or other forces that
could close a cut and pinch or fall into chain.
AVOID PINCH-KICKBACK
1. Be extremely aware of situations or
obstructions that can cause material to pinch
the top of or otherwise stop the chain.
2. Do not cut more than one log at a time.
3. Do not twist saw as bar is withdrawn from an
undercut when bucking.
AVOID PULL-IN
1. Always begin cutting with the engine at full
speed and the saw housing against wood.
2. Use wedges made of plastic or wood. Never
use metal to hold the cut open.
OTHER SAFETY PRECAUTIONS
It is believed that a condition called Raynaud’s
Phenomenon, which affects the fingers of certain
individuals, may be brought about by exposure to
cold and vibration. Accordingly, your chain saw has
4
GENERAL SAFETY RULES
shock mounts designed to reduce the intensity of
vibration received through the handles. Exposure
to cold and vibration may cause tingling and
burning followed by loss of colour and numbness in
the fingers. We strongly recommend you taking the
following precautions because the minimum
exposure which might trigger the ailment is
unknown.
1. Keep your body warm, especially the head and
neck, feet and ankles, and hands and wrists.
2. Maintain good blood
vigorous arm exercises during frequent work
breaks and also by not smoking.
3. Limit the number of hours of chain saw
operation. Try to fill a part of each work day
with jobs other than chain sawing.
4. If you experience discomfort, redness and
swelling of the fingers, followed by whitening
and loss of feeling, consult your physician
before further exposing yourself to cold and
vibration.
REPETITIVE STRESS INJURIES
It is believed that over using th
tendons of the fingers, hands, arms and shoulders
may cause soreness, swelling, numbness,
weakness and extreme pain to the areas just
mentioned. To reduce the risk of repetitive stress
injury, do the following.
1. Avoid using your wrist in a bent, extended or
twisted position. Instead, try to maintain a
straight wrist position. Also, when grasping, use
your whole hand, not just the thumb and index
finger.
2. Take periodic break to minimise repetition and
3. Reduce the speed and force in which you do
4. Do exercises to strengthen the hand and arm
5. See a doctor if you feel tingling, numbness or
MACHINE CONDITIONS
Do not operate a chain saw that is damaged.
Improperly adjusted, or not completely and
securely assembled. Do not operate the chain saw
with a loose of defective silencer. Be sure that the
saw chain stops moving when the throttle cont
trigger is released.
CUTTING
1. Do not operate a chain saw in a tree unless
our hands.
rest y
the repetitive movement.
muscles.
pain in the fingers, hands, wrists or arms.
you have been specifically trained to do so.
circulation by performing
e muscles and
rol
2. Keep all parts of your body away from the saw
chain when the engine is running.
3. Use extreme caution when cutting small-size
bushes and saplings because slender material
may catch the saw chain and be whipped
toward you or pull you off balance.
4. When cutting a limb that is under tension, be
alert for spring back so that you will not be
struck by the limb or ch
tension in the wood fibers is released.
5. Cutting while on a ladder is extremely
dangerous because the ladder can slip and
your control of the chain saw is limited. Working
aloft should be left to professionals.
6. Stop the engine before setting the chain saw
down.
SERVICES
All chain saw service, other than items listed in the
operator’s manual maintenance instruction, should
be performed by competent service personnel. (For
example, if improper tool is use
flywheel in order to remove the clutch, structural
damage to the flywheel could occur and
subsequently could cause the flywheel to burst).
WOOD PRACTICES
1. Operating a chain saw safely requires a chain
saw in proper working order, sound judgment,
and knowledge of the methods which should be
applied in each cutting situation.
2. Do not let any person use your saw unless they
have read this operator’s manual and fully
understands its instructions.
3. Never let chi
4. Use your saw only to cut wood or wood
products. Do not cut solid metal, sheet metal,
plastics or any non-wood materials.
5. Stay on the uphill side when bucking or
lambing logs which might roll when cut.
6. Keep both feet on the ground. Do not work
from off the ground positions.
CHAIN BRAKE
Always check that the chain brake works properly
before use. The chain brake’s function is to stop
chain rotation after a kickback. It neither prevents
nor reduces kickb
brake for protection against kickback. Even with a
chain brake, depend on your own good sense and
proper cutting methods just as though there was
chain brake. Even with normal use and proper
maintenance, the response time of the brake may
lengthen.
ldren operate the saw.
ack. Do not depend on the chain
ain saw when the
d to hold the
5
RULES FOR SAFE OPERATION
The following may interfere with the brake’s ability
o protect the operator:
t
1. Saw wrongly held too close to the operator’s
ody. Kickback time may be too fast even for a
b
erfectly maintained brake to work in time.
p
2. The operator’s hand may not be in position to
contact the hand guard.
3. Brake will not be tripped.
4. Lack of proper maintenance lengthens the
brake’s stopping time, making it less effective.
DESCRIPTION
1 216 4 5 6 7 10 11
17
8-9
5. Dirt, grease, oil, pitch, etc. getting into the
orking parts of the mechanism may lengthen
w
the stopping time.
. Wear and fatigue of the activating brake spring,
6
nd wear of the brake/clutch drum and pivot
a
point may lengthen the brake’s stopping time.
7. A damaged hand guard and lever may render
the brake inoperative.
141312
19
15
1. Chain bar
2. Saw chain
3. Chain tensioning screw
4. Bucking spikes
5. Chain brake lever / front hand guard
6. Front handle
7. Starter handle
8. Spark plug (under the air filter cover)
9. Air filter cover
10. Ignition switch
11. Safety lock
3 182120
12. Oil tank cap
13. Fan housing
14. Fuel tank cap
15. Rear handle / bootstrap
16. Chain guard
17. Choke / (carburettor setting)
18. Bar fastening nuts
19. Throttle lever
20. Primer bulb
21. Chain brake / clutch cover
6
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