Ryobi PCN3840-RY74005D, PCN4545-RY74 User manual

OPERATOR’S MANUAL
PCN3840 - RY74005D - 406 mm (16 in.) 38cc Chainsaw
PCN4545 - RY74007D - 457 mm (18 in.) 45cc Chainsaw
Your new chainsaw has been engineered and manufactured to Ryobi’s high standard for dependability, ease of operation,
and operator safety. Properly cared for, it will give you years of rugged, trouble-free performance.
WARNING: To reduce the risk of injury, the user must read and understand the operator’s manual before
using this product.
Thank you for buying a Ryobi chainsaw.
SAVE THIS MANUAL FOR FUTURE REFERENCE

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■Introduction .......................................................................................................................................................................................... 2
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■General Safety Rules ...................................................................................................................................................................... 3 - 4
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■Specific Safety Rules ...................................................................................................................................................................... 4 - 5
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■Symbols ........................................................................................................................................................................................... 6 - 7
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■Specifications ....................................................................................................................................................................................... 7
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■Features ............................................................................................................................................................................................... 8
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■Operation ...................................................................................................................................................................................... 8 - 14
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■Maintenance ............................................................................................................................................................................... 14 - 18
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■Bar and Chain Combinations ............................................................................................................................................................ 18
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■Troubleshooting .......................................................................................................................................................................... 18 - 19
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■Warranty ............................................................................................................................................................................................. 19
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■Safety Directive .................................................................................................................................................................................. 20
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■Illustrations .......................................................................................................................................................................... Appendix A
WARNING:
Carefully read through this entire operator’s manual
before using your new saw. Pay close attention to the
Safety Rules and all Safety Alert Symbols including
Danger, Warning, and Caution. These safety rules are
for your safety and to prevent possible serious injury.
If you use your saw properly and only for what it is
intended, you will enjoy years of safe, reliable service.
IMPORTANT
Servicing requires extreme care and knowledge and should
be performed only by a qualified service technician. When
servicing use only identical Ryobi replacement parts.
For safe operation, read and understand all instructions
before using the chainsaw. Follow all safety instructions.
Failure to follow all safety instructions listed below may
result in serious personal injury.
Look for this symbol to point out important safety precautions. It means
attention!!! Your safety is involved.
The operation of any tool can result in foreign objects being thrown into your eyes which can result in
severe eye damage. Before beginning 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
spectacles or standard safety glasses with side shields. Always wear eye protection.
WARNING:
TABLE OF CONTENTS
INTRODUCTION

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WARNING:
The warnings, labels, and instructions found in this
section of the operator’s manual are for your safety.
Failure to follow all instructions may result in serious
personal injury.
Safe operation of this tool requires that you read and
understand this operator’s manual and all labels affixed to
the tool. Safety is a combination of using common sense,
staying alert, and knowing how your saw works.
READ ALL INSTRUCTIONS
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■KNOW YOUR TOOL. Read the operator’s manual
carefully. Learn the saw’s applications and limitations as
well as the specific potential hazards related to this tool.
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■CHAINSAWS are designed for cutting wood only.
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■KICK-BACK MAY OCCURWHENTHE NOSE ORTIP
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
toward 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. DO NOT rely exclusively upon
the safety devices built into your saw. As a chainsaw
user, you should take several steps to keep your cutting
jobs free from accident or injury.
1. With a basic understanding of kick-back, you can
reduce or eliminate the element of surprise. Sudden
surprise contributes to accidents.
2. 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 your left hand on the front handle
with your thumbs and fingers encircling the chainsaw
handles. A firm grip together with a stiff left arm
will help you maintain control of the saw if
kick-back occurs.
3. 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.
4. Cut at high engine speeds. Always cut with the
engine running at full speed. Fully squeeze the
throttle trigger and maintain a steady cutting speed.
5. Do not overreach or cut above chest height.
6. Follow the manufacturer’s sharpening and
maintenance instructions for the saw chain.
7. Use only replacement bars and chains specified by
the manufacturer or the equivalent.
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■DO NOT OPERATE A CHAINSAW WITH ONE HAND.
Serious injury to the operator, helpers and/or
bystanders may result from one-handed operation.
A chainsaw is intended for two-handed use.
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■DO NOT OPERATE A CHAINSAW WHENYOU ARE
FATIGUED. Never operate a chainsaw when you are
tired or under the influence of medication, drugs, or
alcohol.
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■USE SAFETY FOOTWEAR. Wear snug-fitting clothing,
protective gloves, and eye, hearing, and head
protection devices.
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■DO NOT STAND ON ANY UNSTABLE SURFACE while
using your chainsaw: that includes ladders, scaffolds,
trees, etc.
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■USE CAUTION WHEN HANDLING FUEL. Move the
chainsaw at least 50 feet (15 m) from the refuelling
point before starting the engine.
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■DO NOT ALLOW OTHER PERSONS to be near the
chainsaw when starting or cutting with the chainsaw.
Keep bystanders and animals out of the work area.
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■DO NOT START CUTTING until you have a clear work
area, secure footing, and a planned retreat path from
the falling tree.
GENERAL SAFETY RULES

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■KEEP ALL PARTS OFYOUR BODY away from the saw
chain when the engine is running.
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■ALWAYS CARRY THE CHAINSAW WITH THE ENGINE
STOPPED ANDTHE BRAKE ENGAGED, the guide bar
and saw chain to the rear, and the silencer away from
your body. When transporting the chainsaw, use the
appropriate guide bar scabbard.
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■DO NOT OPERATE A CHAINSAW THAT IS DAMAGED,
improperly adjusted, or not completely and securely
assembled. Be sure that the saw chain stops moving
when the throttle control trigger is released.
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■TURN OFF THE ENGINE before putting the chainsaw
down. DO NOT leave the engine running unattended.
As an additional safety precaution, apply the chain brake
before putting down the saw.
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■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.
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■WHEN CUTTING A LIMB under tension, be alert for
spring-back so that you will not be struck when the
tension in the wood fibres is released.
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■KEEP THE HANDLES dry, clean, and free of oil or
fuel mixture.
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■OPERATETHE CHAINSAW ONLY in well-ventilated
areas.
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■DO NOT OPERATE A CHAINSAW IN A TREE unless
you have been specifically trained to do so.
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■ALL CHAINSAW SERVICE, other than the items listed
in the instruction manual and all maintenance, should
be performed by competent chainsaw service personnel.
(For example, 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 and subsequently
cause the flywheel to burst.)
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■KEEP SAFE-T-TIP® ANTI-KICK-BACK NOSE GUARD
properly mounted on the guide bar to prevent rotational
kick-back.
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■FOLLOW THE SHARPENING and maintenance
instructions for the saw chain.
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■USE ONLY THE REPLACEMENT GUIDE BARS and low
kick-back chains specified for your saw.
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■DO NOT adapt your powerhead to a bow guide or use
it to power any attachments or devices not listed for
your saw.
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■SAVE THESE INSTRUCTIONS. Refer to them
frequently and use to instruct other users. If you lend
someone this tool, lend them these instructions also.
WARNING:
The warnings, labels, and instructions found in this
section of the operator’s manual are for your safety.
Failure to follow all instructions may result in serious
personal injury.
GENERAL PRECAUTIONS
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■DO NOT CUT VINES and/or small undergrowth (less
than 76 mm (3 in.) in diameter).
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■SILENCER SURFACES ARE VERY HOT during and
after operation of the chainsaw; keep all body parts
away from the silencer. Serious burns may occur if
contact is made with the silencer.
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■ALWAYS HOLDTHE CHAINSAW WITH BOTH HANDS
when the engine is running. Use a firm grip with thumbs
and fingers encircling the chainsaw handles.
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■NEVER LET ANYONE USE YOUR CHAINSAW who
has not received adequate instructions in its proper use.
This applies to rentals as well as privately owned saws.
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■BEFORE YOU START THE ENGINE, make sure the
saw chain is not contacting any object.
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■OPERATE THE CHAINSAW only in well ventilated
areas.
GENERAL SAFETY RULES
SPECIFIC SAFETY RULES

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PROPER CLOTHING FOR SAFETY
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■Wear close-fitting clothing. Always wear heavy, long
trousers, boots, and gloves. Do not wear jewellery,
shorts, sandals, or go barefoot. Do not wear loose-fitting
clothing, which could be drawn into the engine or catch
the chain or undergrowth. Wear overalls, jeans, or
leggings made of cut-resistant material or ones that
contain cut-resistant inserts. Secure hair so that it is
above shoulder level.
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■Wear non-slip safety footwear and heavy-duty gloves to
improve your grip and to protect your hands.
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■Wear eye, hearing, and head protection when operating
this equipment.
REFUELLING (DO NOT SMOKE!)
■To reduce the risk of fire and burn injury, handle fuel
with care. It is highly flammable.
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■Mix and store fuel in a container approved for petrol.
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■Mix fuel outdoors where there are no sparks or flames.
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■Select bare ground, stop the engine, and allow it to cool
before refuelling.
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■Loosen the fuel cap slowly to release pressure and to
keep fuel from escaping around the cap.
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■Tighten the fuel cap securely after refuelling.
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■Wipe spilled fuel from the unit. Move 15 m (50 ft.) away
from refuelling site before starting engine.
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■Never attempt to burn off spilled fuel under
any circumstances.
BASIC PRECAUTIONS IN THE CUTTING/
WORK AREA
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■Do not operate a chainsaw in a tree.
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■Do not cut from a ladder: this is extremely dangerous.
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■Keep bystanders and animals out of the work area.
Do not allow other persons to be nearby during starting
or cutting with the chainsaw.
NOTE: The size of the work area depends on the job
being performed as well as the size tree or workpiece
involved. For example, felling a tree requires a larger
work area than making other cuts, i.e., bucking
cuts, etc.
PUSH AND PULL
The reaction force is always opposite to the direction the
chain is moving.Thus, the operator must be ready to control
the PULL when cutting on the bottom edge of the bar and
the PUSH when cutting along the top edge.
NOTE: Your chainsaw has been fully factory tested. It is
normal to find some slight oil residue on the saw.
MAINTENANCE PRECAUTIONS
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. If the saw chain moves at idling
speed, the carburettor may need adjusting. Refer to
“Operation – Adjusting Idling Speed” later in this manual.
If the saw chain still moves at idling speed after adjust-
ment has been made, contact a Ryobi service dealer for
adjustment and discontinue use until the repair is made.
WARNING:
All chainsaw service, other than items in the
operator’s manual maintenance instructions, should
be performed by competent chainsaw service
personnel. If improper tools are used to remove the
flywheel or clutch, 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 burst and
serious injury could result.
KICK-BACK
Kick-back is a dangerous reaction that can lead to serious
injury. Do not rely only on the safety devices provided with
your saw. As a chainsaw user, you must take special
safety precautions to help keep your cutting jobs free from
accident or injury.
NOTE: Refer to “Operation” later in this manual for added
information on kick-back and how to avoid serious personal
injury.
SPECIFIC SAFETY RULES