OPERATOR’S MANUAL
MANUEL D’UTILISATION MANUAL DEL OPERADOR
RY10521A / 20 in. 46cc Chain Saw
Scie à chaîne de 46 cc de 508 mm (20 po)
Motosierra de 508 mm (20 pulg.), 46 cc
RY10519A / 18 in. 46cc Chain Saw
Scie à chaîne de 46 cc de 457 mm (18 po) Motosierra de 457 mm (18 pulg.), 46 cc
FAMILY: *HCPS.0464AD
FAMILLE : *HCPS.0464AD
FAMILIA: *HCPS.0464AD
NOTICE AVIS AVISO
Do not use E15 or E85 fuel (or fuel containing greater than 10% ethanol) in this product. It is
a violation of federal law and will damage the unit and void your warranty.
Ne pas utiliser d’essence E15 ou E85 (ou un carburant contenant plus de 10 % d’éthanol) dans
ce produit. Une telle utilisation représente une violation de la loi fédérale et endommagera l’appareil et annulera la garantie.
No utilice combustibles E15 o E85 (ni combustibles que contengan más de 10 % de etanol) con este producto. Esto constituye una violación a la ley federal, dañará la unidad y anulará la garantía.
Your chain saw has been engineered and manufactured to Ryobi’s high standard for dependability, ease of operation, and operator safety. When 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 product.
SAVE THIS MANUAL FOR FUTURE REFERENCE
Cette scie à chaîne a été conçue et fabriquée conformément aux strictesnormesdefiabilité,simplicitéd’emploietsécuritéd’utilisation de Ryobi. Correctement entretenue, elle vous donnera des années de fonctionnement robuste et sans problème.
AVERTISSEMENT : Pour réduire les risques de blessures, l’utilisateur doit lire et veiller à bien comprendre le manuel d’utilisation avant d’employer ce produit.
Merci d’avoir acheté un produit Ryobi.
Su motosierra ha sido diseñada y fabricada de conformidad con las estrictas normas de Ryobi para brindar fiabilidad, facilidad de uso y seguridad para el operador. Con el debido cuidado, le brindará muchos años de sólido y eficiente funcionamiento.
ADVERTENCIA: Para reducir el riesgo de lesiones, el usuario debe leer y comprender el manual del operador antes de usar este producto.
Le agradecemos la compra de un producto Ryobi.
CONSERVER CE MANUEL POUR |
GUARDE ESTE MANUAL PARA |
FUTURE RÉFÉRENCE |
FUTURAS CONSULTAS |
TABLE OF CONTENTS |
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TABLE DES MATIÈRES / ÍNDICE DE CONTENIDO |
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Introduction........................................................................................................................................ |
2 |
Introduction / Introducción |
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General Safety Rules..................................................................................................................... |
3-4 |
Règles de sécurité générales / Reglas de seguridad generales |
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Specific Safety Rules..................................................................................................................... |
4-5 |
Règles de sécurité particulières / Reglas de seguridad específicas |
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Symbols......................................................................................................................................... |
6-7 |
Symboles / Símbolos |
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Glossary of Terms.............................................................................................................................. |
8 |
Glossaire / Glosario de términos |
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Features....................................................................................................................................... |
9-10 |
Caractéristiques / Características |
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Assembly......................................................................................................................................... |
11 |
Assemblage / Armado |
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Operation................................................................................................................................... |
11-24 |
Utilisation / Funcionamiento |
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Maintenance.............................................................................................................................. |
25-37 |
Entretien / Mantenimiento |
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Bar and Chain Combinations........................................................................................................... |
38 |
Vue éclatée et liste des pièces / Vista desarrollada y lista de piezas |
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Troubleshooting......................................................................................................................... |
38-39 |
Dépannage / Corrección de problemas |
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Warranty........................................................................................................................................... |
40 |
Garantie / Garantía |
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Parts Ordering and Service................................................................................................ |
Back Page |
Commande de pièces et réparation / Pedidos de piezas y servicio.......................................................... |
Page arrière / Pág. posterior |
INTRODUCTION |
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INTRODUCTION / INTRODUCCIÓN |
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This product has many features for making its use more pleasant and enjoyable. Safety, performance, and dependability have been given top priority in the design of this product making it easy to maintain and operate.
* * *
Ce produit offre de nombreuses fonctions destinées à rendre son utilisation plus plaisante et satisfaisante. Lors de la conception de ce produit, l’accent a été mis sur la sécurité, les performances et la fiabilité, afin d’en faire un outil facile à utiliser et à entretenir.
* * *
Este producto ofrece numerosas características para hacer más agradable y placentero su uso. En el diseño de este producto se ha conferido prioridad a la seguridad, el desempeño y la fiabilidad, por lo cual se facilita su manejo y mantenimiento.
Page 2
GENERAL SAFETY RULES
WARNING:
Read and understand all instructions. Failure to follow all instructions listed below, may result in electric shock, fire and/or serious personal injury.
READ ALL INSTRUCTIONS
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.
■ 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 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 the 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 your 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 maintain control of the saw if kickback occurs.
•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.
•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.
•Do not overreach or cut above chest height.
•Follow the manufacturer’s sharpening and maintenance instructions for the saw chain.
•Only use replacement bars and chains specified by the manufacturer or the equivalent.
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.
Do not operate a chain saw when you are fatigued. Fatigue causes carelessness. Be more cautious before rest periods and towards the end of your shift. Never operate a chain saw when you are tired or under the influence of medication, drugs, or alcohol.
Use safety footwear. Wear snug-fitting clothing, protective gloves, and eye, hearing, and head protection devices.
Heavy protective clothing may increase operator fatigue, which could lead to heat stroke. During weather that is hot and humid, heavy work should be scheduled for early morning or late afternoon hours when temperatures are cooler.
Do not stand on any unstable surface while using the chain saw, that includes ladders, scaffolds, trees, etc.
Use caution when handling fuel. Move the chain saw at least 30 feet from the fueling point before starting the engine.
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.
Do not start cutting until you have a clear work area, secure footing, and a planned retreat path from the falling tree.
Keep all parts of your body away from the saw chain when the engine is running.
Always carry the chain saw with the engine stopped and the chain brake engaged, the
Page 3 — English
GENERAL SAFETY RULES
guide bar and saw chain to the rear, and the muffler away from your body. When transporting the chain saw, use the appropriate guide bar scabbard.
Do not operate a chain saw 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.
■ Shut off the engine before setting the chain saw down. Do not leave the engine running unattended. As an additional safety precaution, apply the chain brake prior to setting down the saw.
■ 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 springback so that you will not be struck when the tension in the wood fibers is released.
■ Keep the handles dry, clean, and free of oil or fuel mixture.
Beware of carbon monoxide poisoning.
Operate the chain saw only in well-ventilated areas.
■ Do not operate a chain saw in a tree unless you have been specifically trained to do so.
Do not cut from a ladder; this is extremely dangerous.
All chain saw service, other than the items listed in the instruction manual and all maintenance, should be performed by competent chain saw 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 could cause the flywheel to burst.)
Always have a fire extinguisher available when using chain saw.
Use only the replacement guide bars and low kickback chains specified for the saw.
■ Do not adapt the powerhead to a bow guide or use it to power any attachments or devices not listed for the saw.
■ The gas powered saw (or electrically powered saw) is classified by CSA as a Class 1C (or Class 2C) saw. It is intended for infrequent use by homeowners, cottagers, and campers, and for such general applications as clearing, pruning, cutting firewood, etc. It is not intended for prolonged use. Prolonged periods of operation can cause circulatory problems in the user’s hands due to vibration. For such use, it may be appropriate to use a saw having an anti-vibration feature.
Save these instructions. Refer to them frequently and use to instruct other users. If you loan someone this product, loan them these instructions also.
SPECIFIC SAFETY RULES
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.
Do not cut vines and/or small underbrush (a diameter of less than 3 in.).
Muffler surfaces are very hot during and after operation of the chain saw; keep all body parts
away from the muffler. Serious burns may occur if contact is made with the muffler.
■ Always hold the chain saw with both hands when the engine is running. Use a firm grip with thumbs and fingers encircling the chain saw handles.
■ Never let anyone use the chain saw who has not received adequate instructions in its proper use. This applies to rentals as well as privately owned saws.
Page 4 — English
SPECIFIC SAFETY RULES
■ Before you start the engine, make sure the saw chain is not contacting any object.
Wear snug-fitting clothing. Always wear heavy, long pants, boots, and gloves. Do not wear jewelry, short pants, sandals, or go barefoot. Do not wear loose fitting clothing, which could be drawn into the engine or catch the chain or underbrush. Wear overalls, jeans, or chaps made of cut-resistant material or ones that contain cut-resistant inserts. Secure hair so that it is above shoulder level.
■ Wear non-slip safety footwear and heavyduty gloves to improve your grip and to protect your hands.
■ Wear eye protection with side shields which is marked to comply with ANSI Z87.1, as well as hearing and head protection, when operating this equipment.
Keep bystanders and animals out of the work area. Do not allow other persons to be nearby during starting or cutting with the chain saw.
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.).
Keep SAFE-T-TIP® anti-kickback nose guard properly mounted on the guide bar to prevent rotational kickback.
Follow the sharpening and maintenance instructions for the saw chain.
Never operate a chain saw that is damaged, improperly adjusted, or is not completely and securely assembled. Be sure that the saw chain stops moving when the throttle control trigger is released. If the saw chain moves at idle speed, the carburetor may need adjusting.
Refer to Adjusting the Carburetor in the
Maintenance section of this manual. If the saw chain still moves at idle speed after adjustment has been made, contact an authorized service center for adjustment and discontinue use until the repair is made.
REFUELING (DO NOT SMOKE!)
■ To reduce the risk of fire and burn injury, handle fuel with care. It is highly flammable.
■ Mix and store fuel in a container approved for gasoline.
■ Mix fuel outdoors where there are no sparks or flames.
■ Select bare ground, stop the engine, and allow it to cool before refueling.
■ Loosen the fuel cap slowly to release pressure and to keep fuel from escaping around the cap.
■ Tighten the fuel cap securely after refueling.
■ Wipe spilled fuel from the unit. Move 30 feet away from refueling site before starting engine.
Never attempt to burn off spilled fuel under any circumstances.
KICKBACK
Kickback is a dangerous reaction that can lead to serious injury. Do not rely only on the safety devices provided with the saw. As a chain saw user, you must take special safety precautions to help keep your cutting jobs free from accident or injury. See the General Safety Rules and Operation sections of this manual for added information on kickback and how to avoid serious personal injury.
SAVE THESE INSTRUCTIONS
Page 5 — English
SYMBOLS
The following signal words and meanings are intended to explain the levels of risk associated with this product.
SYMBOL |
SIGNAL |
MEANING |
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DANGER: |
Indicates an imminently hazardous situation, which, if not |
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avoided, will result in death or serious injury. |
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WARNING: |
Indicates a potentially hazardous situation, which, if not avoided, |
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could result in death or serious injury. |
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CAUTION: |
Indicates a potentially hazardous situation, which, if not avoided, |
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may result in minor or moderate injury. |
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(Without Safety Alert Symbol) Indicates important information NOTICE: not related to an injury hazard, such as a situation that may
result in property damage.
Page 6 — English
SYMBOLS
Some of the following symbols may be used on this product. Please study them and learn their meaning. Proper interpretation of these symbols will allow you to operate the product better and safer.
SYMBOL |
NAME |
DESIGNATION/EXPLANATION |
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Safety Alert |
Indicates a potential personal injury hazard. |
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Read Operator’s Manual |
To reduce the risk of injury, user must read and understand |
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operator’s manual before using this product. |
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Wear Eye, Hearing, and |
Wear eye protection with side shields marked to comply |
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with ANSI Z87.1 as well as hearing and head protection |
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Head Protection |
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when operating this equipment. |
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SAFE-T-TIP® Nose Guard |
The SAFE-T-TIP® nose guard on the guide bar helps prevent |
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kickback. |
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No Smoking |
No smoking, sparks, or open flame. |
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Operate With Two Hands |
Hold and operate the saw properly with both hands. |
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One Handed |
Do not operate the saw using only one hand. |
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Carbon Monoxide |
Engines produce carbon monoxide which is an odorless, |
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deadly poison. Do not operate in an enclosed area. |
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Kickback |
DANGER! Beware of kickback. |
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Bar Nose Contact |
Avoid bar nose contact. |
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Wear Gloves |
Wear non-slip, heavy-duty protective gloves when handling |
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the chain saw. |
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Wear Safety Footwear |
Wear non-slip safety footwear when using this |
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equipment. |
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Use unleaded gasoline intended for motor vehicle use with |
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Gasoline and |
an octane rating of 87 [(R + M)/2] or higher. This product |
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Lubricant |
is powered by a 2-cycle engine and requires pre-mixing |
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gasoline and 2-cycle lubricant. |
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Keep Bystanders Away |
Keep all bystanders and animals at least 50 ft. away. |
Page 7 — English
GLOSSARY OF TERMS
Bucking
The process of cross cutting a felled tree or log into lengths.
Chain Brake
A device used to stop the saw chain.
Chain Saw Power Head
A chain saw without the saw chain and guide bar.
Clutch
A mechanism for connecting and disconnecting a driven member to and from a rotating source of power.
Drive Sprocket or Sprocket
The toothed part that drives the saw chain.
Felling
The process of cutting down a tree.
Felling Back Cut
The final cut in a tree felling operation made on the opposite side of the tree from the notching undercut.
Front Hand Guard
A structural barrier between the front handle of a chain saw and the guide bar, typically located close to the hand position on the front handle, and sometimes employed as an activating lever for a chain brake.
Front Handle
The support handle located at or toward the front of the chain saw. This handle is for the left hand.
Guide Bar
A solid railed structure that supports and guides the saw chain.
Kickback
The backward or upward motion, or both, of the guide bar occurring when the saw chain near the nose of the top area 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.
Kickback (Pinch)
Therapidpushbackofthesawwhichcanoccurwhen the wood closes in and pinches the moving saw chain in the cut along the top of the guide bar.
Kickback (Rotational)
The rapid upward and backward motion of the saw which can occur when the moving saw chain near the upper portion of the tip of the guide bar contacts an object, such as a log or branch.
Low-Kickback Chain
A chain that complies with the kickback performance requirements of ANSI B175.1 when tested on a representative sample of chain saws.
Normal Cutting Position
Thosepositionsassumedinperformingthebucking and felling cuts.
Notching Undercut
A notch cut in a tree that directs the tree’s fall.
Rear Handle
The support handle located at or toward the rear of the saw. It normally contains the throttle. This handle is for the right hand.
Reduced Kickback Guide Bar
A guide bar which has been demonstrated to reduce kickback significantly.
Replacement Saw Chain
A chain that complies with the kickback performance requirements of ANSI B175.1 when tested with specific chain saws. It may not meet the ANSI performance requirements when used with other saws.
SAFE-T-TIP® Nose Guard
An attachment that may be provided on the end of the guide bar to prevent the chain at the end of the guide bar from contacting the wood.
Saw Chain
A loop of chain having cutting teeth that cut the wood, and that is driven by the motor and is supported by the guide bar.
Springpole
A small tree (sapling) or limb that is bent or trapped under tension. It may “spring back” rapidly when cut, causing a dangerous situation.
Page 8 — English
FEATURES
PRODUCT SPECIFICATIONS
Bar length: |
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RY10521A |
................................................ 20 in. |
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RY10519A................................................ |
18 in. |
Chain pitch.............................................. |
. 325 in. |
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Chain gauge............................................ |
. 050 in. |
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Chain type............................................. |
Standard |
Drive sprocket.......................................... |
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7-tooth |
Engine displacement.................................... |
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46cc |
Idle engine speed......... |
2,600-3,400 r/min. (RPM) |
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Fuel tank capacity................................... |
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19.4 oz. |
Chain lubricant tank capacity................. |
11.8 oz. |
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Weight - No bar, chain, fuel or lubricant... |
11 lbs. |
STARTER GRIP |
TRIGGER |
AND ROPE |
RELEASE |
MUFFLER
THROTTLE
TRIGGER
CHAIN OIL
CAP
FRONT HAND GUARD/
FRONT CHAIN BRAKE
HANDLE
CYLINDER |
SAFE-T-TIP® |
COVER |
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CLUTCH COVER
REAR
HANDLE
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BAR |
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MOUNTING |
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NUTS |
PRIMER |
FELLING |
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BULB |
DIRECTION |
CHAIN TENSIONING |
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LINE |
SCREW |
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CHOKE |
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LEVER |
Fig. 1a |
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Page 9 — English
FEATURES
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AIR FILTER |
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COVER |
FELLING |
STARTER GRIP |
DIRECTION |
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LINE |
AND ROPE |
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REAR |
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HANDLE |
STARTER/FAN |
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HOUSING |
ON/STOP |
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FUEL CAP |
THROTTLE |
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SWITCH |
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TRIGGER |
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Fig. 1b
KNOW YOUR CHAIN SAW
See Figures 1a - 1b.
The safe use of this product requires an understanding of the information on the product and in this operator’s manual as well as a knowledge of the project you are attempting. Before use of this product, familiarize yourself with all operating features and safety rules.
CHOKE LEVER
The choke lever opens and closes the choke valve in the carburetor. Positions available include FULL CHOKE and RUN.
FELLING DIRECTION LINE
The felling direction line helps you keep the saw aligned properly during tree felling.
FRONT HAND GUARD / CHAIN BRAKE
The chain brake is designed to quickly stop the chain from rotating. When the front hand guard/ chain brake is pushed toward the bar, the chain should stop immediately. The chain brake does not prevent kickback.
GUIDE BAR
The factory-equipped guide bar has a small radius tip that offers a somewhat lower kickback potential.
LOW KICKBACK SAW CHAIN
The low kickback saw chain helps minimize the force of a kickback reaction by preventing the cutters from digging in too deeply at the kickback zone.
PRIMER BULB
The primer bulb pumps fuel from the fuel tank to the carburetor.
SAFE-T-TIP® ANTI-KICKBACK NOSE GUARD
The SAFE-T-TIP® Anti-Kickback Nose Guard is an attachment provided on the end of the guide bar to prevent the chain on the end of the guide bar from contacting the wood.
THROTTLE TRIGGER
The throttle trigger is used for controlling chain rotation.
Page 10 — English
ASSEMBLY
UNPACKING
This product has been shipped completely assembled.
nCarefully remove the product and any accessories from the box. Make sure that all items listed in the packing list are included.
WARNING:
PACKING LIST
Chain Saw
Scabbard
Combination Wrench
2-Cycle Engine Lubricant
Case
Operator’s Manual
Do not use this product if it is not completely assembled or if any parts appear to be missing or damaged. Use of a product that is not properly and completely assembled could result in serious personal injury.
nInspect the product carefully to make sure no breakage or damage occurred during shipping.
nDo not discard the packing material until you have carefully inspected and satisfactorily operated the product.
nIf any parts are damaged or missing, please call 1-800-860-4050 for assistance.
WARNING:
If any parts are damaged or missing do not operate this product until the parts are replaced. Use of this product with damaged or missing parts could result in serious personal injury.
WARNING:
Do not attempt to modify this product or create accessories not recommended for use with this product. Any such alteration or modification is misuse and could result in a hazardous condition leading to possible serious personal injury.
NOTE: The chain saw hasbeen fully factory tested. It is normal to find some slight lubricant residue on the saw. Read and remove all hang tags and store with the Operator’s Manual.
OPERATION
WARNING:
Do not allow familiarity with this product to make you careless. Remember that a careless fraction of a second is sufficient to inflict serious injury.
WARNING:
Muffler surfaces are very hot during and after operation of the chain saw; keep all body parts away from the muffler. Serious burns could occur if contact is made with the muffler.
WARNING:
Always wear eye protection with side shields marked to comply with ANSI Z87.1, along with hearing and head protection. Failure to do so could result in objects being thrown into your eyes and other possible serious injuries.
WARNING:
Do not use any attachments or accessories not recommended by the manufacturer of this product. The use of attachments or accessories not recommended can result in serious personal injury.
Page 11 — English
OPERATION
WARNING:
Operation of this equipment may create sparks that can start fires around dry vegetation. A spark arrestor may be required. The operator should contact local fire agencies for laws or regulations relating to fire prevention requirements.
APPLICATIONS
You may use this product for the purposes listed below:
Basic limbing, felling, and bucking
Removing buttress roots
WARNING:
Always shut off engine before fueling. Never add fuel to a machine with a running or hot engine. Move at least 30 ft. from refueling site before starting the engine. DO NOT SMOKE! Stay away from open flames or sparks. Failure to heed this warning could result in serious personal injury.
FUEL AND REFUELING HANDLING THE FUEL SAFELY
WARNING:
Check for fuel leaks. A leaking fuel cap is a fire hazard and must be replaced immediately. If you find any leaks, correct the problem before using the product. Failure to do so could result in a fire that could cause serious personal injury.
nAlways handle fuel with care; it is highly flammable.
nAlways refuel outdoors and do not inhale fuel vapors.
nDo not let gasoline or lubricant come in contact with skin.
nKeep gasoline and lubricant away from the eyes. If gasoline or lubricant comes in contact with the eyes, wash them immediately with clean water. If irritation is still present, see a doctor immediately.
n Clean up spilled fuel immediately.
Refer to Refueling in the Specific Safety Rules section of this manual for additional safety information.
MIXING THE FUEL
This product is powered by a 2-cycle engine and requires pre-mixing gasoline and 2-cycle lubricant. Pre-mix unleaded gasoline and 2-cycle engine lubricant in a clean container approved for gasoline. DO NOT mix quantities larger than usable in a 30-day period.
Recommended fuel: This engine is certified to operate on unleaded gasoline intended for automotive use.
NOTE: We recommend you use Homelite premium 2-cycle lubricant, PowerCare 2-cycle lubricant (6.4 oz. or 16 oz.), or an equivalent high-quality synthetic 2-cycle lubricant in this product. Mix at 2.6 oz. per gallon (US).
Donotuseautomotivelubricantor2-cycleoutboard lubricant.
HIGH QUALITY 2-CYCLE
ENGINE LUBRICANT
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GASOLINE |
LUBRICANT |
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1.0 gal. (US) (3.8 liter) |
2.6 oz. (76 ml) |
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2.5 gal. (US) (9.5 liter) |
6.4 oz. (189 ml) |
OXYGENATED FUELS
NOTICE:
Do not use E15 or E85 fuel (or fuel containing greater than 10% ethanol) in this product. It is a violation of federal law and will damage the unit and void your warranty.
Fuel system damage or performance problems resulting from the use of an oxygenated fuel containing more than the percentage of oxygenates stated below are not covered under warranty.
Ethanol. Gasoline containing up to 10% ethanol by volume (commonly referred to as E10) is acceptable. E15 and E85 are not.
Page 12 — English
OPERATION
FILLING THE FUEL TANK
See Figure 2.
nClean the surface around the fuel cap to prevent contamination.
nLoosen the fuel cap slowly, by turning counterclockwise.
nCarefully pour the fuel mixture into the tank. Avoid spillage.
nPriortoreplacingthefuelcap,cleanandinspectthe o-ring.
nImmediately replace the fuel cap and hand tighten, by turning clockwise. Wipe up any fuel spillage.
nMove at least 30 ft. away from refueling area before starting the product.
NOTE: It is normal for the engine to emit smoke during and after the first use.
ADDING BAR AND CHAIN LUBRICANT
See Figure 3.
Use RYOBI Bar and Chain Lubricant. It is designed for chains and chain oilers, and is formulated to perform over a wide temperature range with no dilution required. Chain saw should use approximately one tank of lubricant per tank of fuel.
NOTE: Do not use dirty, used, or otherwise contaminated lubricants. Damage may occur to the oil pump, bar, or chain.
nCarefully pour the bar and chain lubricant into the oil tank.
nFill the oil tank every time you fuel the engine.
Fig. 2
Fig. 3
Page 13 — English
OPERATION
OPERATING THE CHAIN BRAKE
See Figures 4 - 5.
Check the operating condition of the chain brake prior to each use.
nEngage the chain brake by rotating your left hand around the front handle, allowing the back of your hand to push the chain brake lever/hand guard toward the bar while the chain is rotating rapidly. Be sure to maintain both hands on the saw handles at all times.
nReset the chain brake back into the RUN position by grasping the top of the chain brake lever/hand guard and pulling toward the front handle until you hear a click.
WARNING:
If the chain brake does not stop the chain immediately, or if the chain brake will not stay in the run position without assistance, take the saw to an authorized service center for repair prior to use.
STARTING THE ENGINE
See Figures 6 - 11.
Starting the product differs depending on whether the engine is cold or warm.
WARNING:
Keep your body to the left of the chain line. Never straddle the saw or chain, or lean over past the chain line.
nPlace the chain saw on level ground and ensure that no objects or obstructions are in the immediate vicinity that could come in contact with the bar and chain.
nHold the front handle firmly with your left hand and put your right foot onto the base of the rear handle.
To start a cold engine:
nSet the on/stop switch to the RUN ( I ) position.
nMake sure the chain brake is in the run position by pulling back on the lever/hand guard.
nFully press and release the primer bulb 7 times.
BRAKE
POSITION
Fig. 4
RUN
POSITION
Fig. 5
STARTER GRIP
AND ROPE
Fig. 6
ON/STOP SWITCH SWITCH IN THE RUN POSITION
Fig. 7
nPull choke lever all the way out to FULL CHOKE position.
nWhen the temperature is above 50°F, pull the starter grip and rope until the engine attempts to start, but no more than 3 times. When the
Page 14 — English
OPERATION |
|
|
temperature is below 50°F, pull the starter grip |
|
|
and rope until the engine attempts to start, but |
|
RUN |
no more than 5 times. |
|
|
n Push choke lever to RUN position. |
|
POSITION |
|
|
|
n Pull starter grip and rope until engine runs. |
|
|
NOTE: Allow the saw to run in this position |
|
|
15-30 seconds, depending upon the tempera- |
|
|
ture. |
|
|
n Depress the trigger release and squeeze and |
|
Fig. 8 |
release the throttle trigger to return the engine |
|
|
|
|
|
to idle after a total run time of at least 30 sec- |
PRIMER BULB |
|
onds. |
|
|
|
|
|
NOTICE: |
|
|
Failure to release partial throttle when chain |
|
|
brake lever is in the brake position will result in |
|
|
serious damage to the unit. Never squeeze and |
|
|
hold the throttle trigger while the chain brake is |
|
|
in the brake position. |
|
Fig. 9 |
|
|
To Start a Warm Engine:
nSet the on/stop switch to the RUN ( I ) position.
nMake sure the chain brake is in the run position by pulling back on the lever/hand guard.
nPull choke lever out to FULL CHOKE position then push immediately back to RUN position to set fast idle.
nPull starter grip and rope until engine runs, but no more than 5 times. If engine does not start after 5 pulls, use cold engine starting procedure.
nSqueeze and release the throttle trigger to return the engine to idle.
CHOKE
LEVER
Fig. 10
TRIGGER
RELEASE
THROTTLE |
Fig. 11 |
TRIGGER |
Page 15 — English
OPERATION
STOPPING THE ENGINE
See Figures 12 - 13.
Release the throttle trigger and let the engine return to idle. To stop the engine, move the on/stop switch to the STOP ( ) position. Do not put the chain saw on the ground when the chain is still moving. For additional safety, set the chain brake when the saw is not in use.
In the event that the on/stop switch will not stop the saw, pull the choke lever out to the fully extended position (FULL CHOKE ) and engage chain brake to stop the engine. If the on/stop switch will not stop the saw when set to the STOP position, have the on/stop switch repaired before using the chain saw again to prevent unsafe conditions or serious injury.
NOTE: When you are finished using the saw, always relieve tank pressure by loosening, then retightening, the chain oil and fuel caps. Allow the engine to cool before storing.
ADJUSTING IDLE SPEED
See Figure 14.
WARNING:
ON/STOP
SWITCH IN THE
STOP POSITION
Fig. 12
BRAKE
POSITION
The chain will move around the guide bar when |
|
|
adjusting the idle speed. Wear all protective |
|
|
clothing and keep all bystanders, children, and |
|
|
pets at least 50 ft. away. Make adjustments |
|
|
with the unit supported on a stable surface so |
Fig. 13 |
|
that the chain/guide bar does not contact the |
||
|
||
ground or any object. Keep all parts of your |
|
|
body away from the chain/guide bar and muf- |
|
|
fler. Failure to follow these instructions could |
|
|
result in serious personal injury. |
|
|
n If the engine starts, runs, and accelerates, |
|
|
but will not idle, turn the idle speed screw “T” |
|
|
clockwise to increase idle speed. |
|
|
n If the chain turns at idle, turn the idle speed |
IDLE SPEED |
|
screw “T” counterclockwise to reduce the |
||
idle RPM and stop the chain movement. If the |
SCREW “T” |
|
|
||
saw chain still moves at idle speed, contact an |
|
|
authorized service center for adjustment and |
|
|
discontinue use until the repair is made. |
Fig. 14 |
|
|
Page 16 — English
OPERATION
WARNING:
THE SAW CHAIN SHOULD NEVER TURN AT IDLE. Turn the idle speed screw “T” counterclockwise to reduce the idle RPM and stop the chain, or contact an authorized service center for adjustment and discontinue use until the repair is made. Serious personal injury could result from the saw chain turning at idle.
PULL AND PUSH
See Figure 15.
The reaction force of the saw 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: The chain saw has been fully factory tested. It is normal to find some slight oil residue on the saw.
WARNING:
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 the saw. As a chain saw user, you should take steps to keep your cutting jobs free from accident or injury. See General Safety Rules for more details.
PUSH
Fig. 15
Page 17 — English
OPERATION
KICKBACK PRECAUTIONS
See Figures 16 - 17.
Rotational kickback occurs when the moving chain contacts an object at the Kickback Danger Zone of the guide bar. The result is a lightning-fast reverse reaction, which kicks the guide bar up and back towards the operator. This reaction can cause loss of control, which can result in serious injury.
PREPARING FOR CUTTING
PROPER GRIP ON HANDLES
See Figure 18.
See General Safety Rules for appropriate safety equipment.
nWear non-slip gloves for maximum grip and protection.
nHold the saw firmly with both hands. Always keep your left hand on the front handle and your right hand on the rear handle so that your body is to the left of the chain line.
WARNING:
Never use a left-handed (cross-handed) grip or any stance that would place your body or arm across the chain line.
nMaintain a proper grip on the saw whenever the engine is running. The fingers should encircle the handle and the thumb is wrapped under the handlebar. This grip is least likely to be broken by a kickback or other sudden reaction of the saw. Any grip in which the thumb and fingers are on the same side of the handle is dangerous because a slight kick of the saw can cause loss of control.
WARNING:
DO NOT operate the throttle |
|
trigger with your left hand |
|
and hold the front handle |
|
with your right hand. Never |
CHAIN |
allow any part of your body |
|
to be in the chain line while |
LINE |
operating a saw. |
|
KICKBACK
DANGER ZONE
Fig. 16
Fig. 17
|
PROPER HAND GRIP |
|
POSITION |
PROPER GRIP |
IMPROPER GRIP |
Fig. 18
Page 18 — English
OPERATION
PROPER CUTTING STANCE
See Figure 19.
WARNING:
Alway use the proper cutting stance described in this section. Never kneel when using the chain saw except when felling a tree as shown in figure 24. Kneeling could result in loss of stability and control of the saw resulting in serious personal injury.
nBalance your weight with both feet on solid ground.
nKeep left arm with elbow locked in a “straight arm” position to withstand any kickback force.
nKeep your body to the left of the chain line.
nKeep your thumb on underside of handlebar.
WORK AREA PRECAUTIONS
See Figure 20.
nCut only wood or materials made from wood; no sheet metal, no plastics, no masonry, no non-wood building materials.
■n Never allow children to operate the saw. Allow no person to use this chain saw who has not read this operator’s manual or received adequate instructions for the safe and proper use of this chain saw.
■n Keep everyone – helpers, bystanders, children, and animals, a SAFE DISTANCE from the cutting area. During felling operations, the safe distance should be a least twice the height of the largest trees in the felling area. During bucking operations, keep a minimum distance of 15 feet between workers.
■n Always cut with both feet on solid ground to prevent being pulled off balance.
■n Do not cut above chest height as a saw held higher is difficult to control against kickback forces.
■n Do not fell trees near electrical wires or buildings. Leave this operation for professionals.
■n Cut only when visibility and light are adequate for you to see clearly.
THUMB ON |
CHAIN LINE |
STRAIGHT |
|
ARM |
|||
UNDERSIDE OF |
|||
|
|
||
HANDLE BAR |
|
|
Fig. 19
Fig. 20
BASIC OPERATING/CUTTING PROCEDURES
Practice cutting a few small logs using the following technique to get the “feel” of using the saw before you begin a major sawing operation.
nTake the proper stance in front of the wood with the saw idling.
nAccelerate the engine to full throttle just before entering the cut by squeezing the throttle trigger.
nBegin cutting with the saw against the log.
nKeep the engine at full throttle the entire time you are cutting.
nAllow the chain to cut for you; exert only light downward pressure. Forcing the cut could result in damage to the bar, chain, or engine.
nRelease the throttle trigger as soon as the cut is completed allowing the engine to idle. Running
Page 19 — English
OPERATION
the saw at full throttle without a cutting load can result in unnecessary wear to the chain, bar, and engine.
nDo not put pressure on the saw at the end of the cut.
FELLING TREES HAZARDOUS CONDITIONS
WARNING:
Do not fell trees during periods of high wind or heavy precipitation. Wait until the hazardous weather has ended.
When felling a tree, it is important that you heed the following warnings to prevent possible serious injury.
■n Do not cut down trees having an extreme lean or large trees with rotten limbs, loose bark, or hollow trunks. Have these trees pushed or dragged down with heavy equipment, then cut them up.
■n Do not cut trees near electrical wires or buildings.
■n Check the tree for damaged or dead branches that could fall and hit you during felling.
■n Periodically glance at the top of the tree during the backcut to assure the tree is going to fall in the desired direction.
nIf the tree starts to fall in the wrong direction, or if the saw gets caught or hung up during the fall, leave the saw and save yourself!
PROPER PROCEDURE FOR TREE FELLING
See Figures 21 - 24.
nPick your escape route (or routes in case the intended route is blocked). Clear the immediate area around the tree and make sure there are no obstructions in your planned path of retreat. Clear the path of safe retreat approximately 135° from the planned line of fall.
nConsider the force and direction of the wind, the lean and balance of the tree, and the location of large limbs. These things influence the direction in which the tree will fall. Do not try to fell a tree along a line different from its natural line of fall.
PLANNED LINE
OF FALL
90°
135° FROM PLANNED
LINE OF FALL PATH OF SAFE RETREAT
PLANNED |
135° |
|
PATH |
LINE OF |
|
OF SAFE |
|
FALL |
|
45° |
RETREAT |
|
|
|
90° |
45°
135°
Fig. 21
HINGE 2 in. OR 1/10 DIA
NOTCH -
APPROX. 1/3
DIAMETER OF
TRUNK
BACK CUT
2 in.
Fig. 22
Page 20 — English
OPERATION
NOTE: Before every cut, make sure the felling direction line on the saw housing is aligned with the desired path for the tree to fall.
nCut a notch about 1/3 the diameter of the trunk in the side of the tree. Make the notch cuts so they intersect at a right angle to the line of fall. This notch should be cleaned out to leave a straight line. To keep the weight of the wood off the saw, always make the lower cut of the notch before the upper cut.
nMake the backcut level and horizontal, and at a minimum of 2 in. above the horizontal cut of the notch.
NOTE: Never cut through to the notch. Always leave a band of wood between the notch and back cut (approximately 2 in. or 1/10 the diameter of the tree). This is called “hinge” or “hingewood.” It controls the fall of the tree and prevents slipping or twisting or shootback of the tree off the stump.
nOn large diameter trees, stop the back cut before it is deep enough for the tree to either fall or settle back on the stump. Then insert soft wooden or plastic wedges into the cut so they do not touch the chain. Drive wedges in, little by little, to help jack the tree over.
NOTE: When bucking or felling with a wedge, it may be necessary to remove the SAFE-T-TIP® anti-kickback device to allow the bar to be drawn through the cut. After you complete the cut, reinstall the tip immediately.
nAs tree starts to fall, stop the chain saw and put it down immediately. Retreat along the cleared path, but watch the action in case something falls your way.
WARNING:
Never cut through to the notch when making a back cut. The hinge controls the fall of the tree, this is the section of wood between the notch and backcut.
HINGE
BACK CUT
Fig. 23
PLANNED
LINE OF
FALL
TREE
FELLING |
|
DIRECTION |
|
LINE |
Fig. 24a |
WEDGE
Fig. 24b
Page 21 — English
OPERATION
REMOVING BUTTRESS ROOTS
See Figure 25.
A buttress root is a large root extending from the trunk of the tree above the ground. Remove large buttress roots prior to felling. Make the horizontal cut into the buttress first, followed by the vertical cut. Remove the resulting loose section from the work area. Follow the correct tree felling procedure as stated in Proper Procedure For Tree Felling after you have removed the large buttress roots.
BUCKING
See Figure 26.
Bucking is the term used for cutting a fallen tree to the desired log length.
nCut only one log at a time.
nSupport small logs on a saw horse or another log while bucking.
nKeep a clear cutting area. Make sure that no objects can contact the guide bar nose and chain during cutting, this can cause kickback. To avoid the danger, keep the SAFE-T-TIP® anti-kickback device attached while cutting. Refer to Kickback in the Specific Safety Rules section of this manual for more information.
■n During bucking operations, stand on the uphill side so that the cut-off section of the log cannot roll over you.
■n Sometimes it is impossible to avoid pinching (with just standard cutting techniques) or difficult to predict which way a log will settle when cut.
BUCKING WITH A WEDGE
See Figure 27.
If the wood diameter is large enough for you to insert a soft bucking wedge without touching the chain, you should use the wedge to hold the cut open to prevent pinching.
NOTE: When bucking or felling with a wedge, you mayneedtoremovetheSAFE-T-TIP® anti-kickback device to allow the bar to be drawn through the cut. After you complete the cut, reinstall the tip.
VERTICAL
CUT
LOOSE
SECTION
HORIZONTAL
CUT
Fig. 25
Fig. 26
WEDGE
Fig. 27
Page 22 — English
OPERATION
BUCKING LOGS UNDER STRESS
See Figure 28.
Make the first bucking cut 1/3 of the way through the log and finish with a 2/3 cut on the opposite side. As you cut the log, it will tend to bend. The saw can become pinched or hung in the log if you make the first cut deeper than 1/3 of the diameter of the log.
Give special attention to logs under stress to prevent the bar and chain from pinching.
OVERBUCKING
See Figure 29.
Begin on the top side of the log with the bottom of the saw against the log; exert light pressure downward. Note that the saw will tend to pull away from you.
UNDERBUCKING
See Figure 30.
Begin on the under side of the log with the top of the saw against the log; exert light pressure upward. During underbucking, the saw will tend to push back at you. Be prepared for this reaction and hold the saw firmly to maintain control.
LOG SUPPORTED AT ONE END
FINISHING CUT LOAD
1ST CUT 1/3 DIA
LOG SUPPORTED AT BOTH ENDS
1ST CUT 1/3 DIA LOAD
FINISHING CUT |
Fig. 28 |
Fig. 29
Fig. 30
Page 23 — English
OPERATION
LIMBING AND PRUNING
See Figures 31 - 32.
nWork slowly, keeping both hands on the saw with a firm grip. Maintain secure footing and balance.
■n Keep the tree between you and the chain while limbing.
nDo not cut from a ladder. This is extremely dangerous. Leave this operation for professionals.
■n Do not cut above chest height. A saw held higher than chest height is difficult to control against kickback.
WARNING:
Never climb into a tree to limb or prune. Do not stand on ladders, platforms, a log, or in any position which can cause you to lose your balance or control of the saw.
■n When pruning trees it is important not to make the flush cut next to the main limb or trunk until you have cut off the limb further out to reduce the weight. This prevents stripping the bark from the main member.
• Underbuck the branch 1/3 through for your first cut.
•Overbuck the branch to drop it.
•Finish by cutting smoothly and neatly against the main member so the bark will grow back to seal the wound.
WARNING:
If the limbs to be pruned are above chest height, hire a professional to perform the pruning.
CUTTING SPRINGPOLES
See Figure 33.
A springpole is any log, branch, rooted stump, or sapling which is bent under tension by other wood so that it springs back if the wood holding it is cut or removed. On a fallen tree, a rooted stump has a high potential of springing back to the upright position during the bucking cut to separate the log from the stump. Watch out for springpoles — they are dangerous.
LOAD SECOND CUT
FIRST CUT 1/3 DIAMETER
FINISHING CUT
Fig. 31
CUT LIMBS ONE AT A TIME AND LEAVE SUPPORT LIMBS UNDER TREE UNTIL LOG IS CUT
Fig. 32
SPRINGPOLE |
Fig. 33 |
|
WARNING:
Springpoles are dangerous and could strike the operator, causing the operator to lose control of the chain saw. This could result in severe or fatal injury to the operator.
Page 24 — English
MAINTENANCE
WARNING:
Make sure the on/stop switch is in the STOP “ ” position and the chain has stopped before performing any maintenance on the saw. Failure to do so may result in serious personal injuries.
WARNING:
Muffler surfaces are very hot during and after operation of the chain saw; keep all body parts away from the muffler. Serious burns could occur if contact is made with the muffler.
WARNING:
When servicing, use only identical replacement parts. Use of any other parts could create a hazard or cause product damage.
WARNING:
Always wear eye protection with side shields marked to comply with ANSI Z87.1, along with hearing and head protection. Failure to do so could result in objects being thrown into your eyes and other possible serious injuries.
GENERAL MAINTENANCE
Avoid using solvents when cleaning plastic parts. Most plastics are susceptible to damage from various types of commercial solvents and may be damaged by their use. Use clean cloths to remove dirt, dust, lubricant, grease, etc.
WARNING:
Do not at any time let brake fluids, gasoline, petroleum-based products, penetrating oils, etc., come in contact with plastic parts. Chemicals can damage, weaken or destroy plastic which may result in serious personal injury.
RUN
POSITION
Fig. 34
|
COMBINATION |
|
WRENCH |
BAR MOUNTING |
|
NUTS |
Fig. 35 |
|
CLUTCH
COVER
BAR MOUNTING
NUTS
Fig. 36
LUBRICATION
All of the bearings in this product are lubricated with a sufficient amount of high grade lubricant for the life of the unit under normal operating conditions. Therefore, no further lubrication is required.
Page 25 — English
MAINTENANCE
REPLACING THE GUIDE BAR AND CHAIN
See Figures 34 - 43.
DANGER:
Never start the engine before installing the guide bar, chain, clutch cover, and clutch drum. Without all these parts in place, the clutch can fly off or explode, exposing the user to possible serious injury.
CUTTERS CHAIN ROTATION
CHAIN DRIVE LINKS
WARNING:
To avoid serious personal injury, read and understand all the safety instructions in this section.
nAlways place the on/stop switch in the STOP ( ) position before you work on the saw.
nMake sure the chain brake is not set by pulling the chain brake lever/hand guard towards the front handle to the run position.
NOTE: When replacing the guide bar and chain, always use the specified bar and chain listed in the Bar and Chain Combinations section later in this manual.
nWear gloves when handling the chain and bar. These components are sharp and may contain burrs.
nRemove the bar mounting nuts using the combination wrench provided or a 13 mm socket wrench.
nRemove the clutch cover.
nRemove the bar and chain from the mounting surface.
nRemove the old chain from the bar.
nLay out the new saw chain in a loop and straighten any kinks. The cutters should face in the direction of chain rotation. If they face backwards, turn the loop over.
nPlace the chain drive links into the bar groove as shown.
nPosition the chain so there is a loop at the back of the bar.
nHold the chain in position on the bar and place the loop around the sprocket.
Fig. 37
BAR
GROOVE
CHAIN DRIVE
LINKS
Fig. 38
nFit the bar flush against the mounting surface so that the bar studs are in the long slot of the bar.
nReplace the clutch cover ensuring that the adjusting pin in the clutch cover is in the bar tensioning pin hole and that both bar studs are in their respective holes in the clutch cover.
NOTE: The adjusting pin may need to be slightly repositioned with the chain tensioning screw so that it is aligned with the position of the bar chain tensioning pin hole.
Page 26 — English
MAINTENANCE
nReplace and fingertighten the bar mounting nuts. The bar must be free to move for tension adjustment.
nRemove all slack from the chain by turning the chain tensioning screw clockwise until the chain seats snugly against the bar with the drive links in the bar groove.
nLift the tip of the guide bar up to check for sag.
nRelease the tip of the guide bar and turn the chain tensioning screw 1/2 turn clockwise. Repeat this process until sag does not exist.
nHold the tip of the guide bar up and tighten the bar mounting nuts securely.
The chain is correctly tensioned when there is no sag on the underside of the guide bar, the chain is snug, but it can be turned by hand without binding. Ensure that the chain brake is not set.
NOTE: If chain is too tight, it will not rotate. Loosen the bar nuts slightly and turn the tension adjuster 1/4 turn counterclockwise. Lift the tip of the guide bar up and retighten the bar nuts securely. Ensure that the chain will rotate without binding.
BAR STUD HOLES
ADJUSTING
PIN
CLUTCH |
BAR |
|
MOUNTING |
||
COVER |
||
NUTS |
||
|
SPROCKET
Fig. 39
CHAIN
TENSIONING
SCREW
Fig. 40
Page 27 — English
MAINTENANCE
ADJUSTING THE CHAIN TENSION
See Figures 44 - 46.
WARNING:
Never touch or adjust the chain while the engine is running. The saw chain is very sharp. Always wear protective gloves when performing maintenance on the chain.
nStop the engine before setting the chain tension.
nMake sure the bar mounting nuts are loosened to finger tight.
nTurn the chain tensioning screw clockwise to tension the chain.
NOTE: A cold chain is correctly tensioned when there is no slack on the underside of the guide bar, the chain is snug, and it can be turned by hand without binding.
nRetension the chain whenever the flats on the drive links hang out of the bar groove.
NOTE: During normal saw operation, the temperature of the chain increases. The drive links of a correctly tensioned warm chain will hang approximately .050 in. out of the bar groove. The tip of the combination wrench can be used as a guide to help determine the correct warm chain tension.
NOTE: New chains tend to stretch; check the chain tension frequently and tension as required.
CAUTION:
A chain tensioned while warm may be too tight upon cooling. Check the “cold tension” before next use.
Fig. 41
Fig. 42
Fig. 43
FLATS ON DRIVE LINKS
Fig. 44
Page 28 — English
MAINTENANCE
CHAIN MAINTENANCE
See Figures 47 - 48.
CAUTION:
Check that the switch is in the STOP ( ) position before you work on the saw.
Use only a low-kickback chain on this saw. This fast-cutting chain provides kickback reduction when properly maintained.
For smooth and fast cutting, maintain the chain properly.
The chain requires sharpening when the wood chips are small and powdery, the chain must be forced through the wood during cutting, or the chain cuts to one side. During maintenance of the chain, consider the following:
■n Improper filing angle of the side plate can increase the risk of severe kickback.
nRaker (depth gauge) clearance.
• Too low increases the potential for kickback.
• Not low enough decreases cutting ability.
nIf the cutter teeth hit hard objects such as nails and stones, or are abraded by mud or sand on the wood, have an authorized service center sharpen the chain.
NOTE: Inspect the drive sprocket for wear or damage when replacing the chain. If signs of wear or damage are present in the areas indicated, have the drive sprocket replaced by an authorized service center.
NOTE: If you do not fully understand the correct procedure for sharpeningthe chain after readingthe instructions that follow, have the saw chain sharpened by an authorized service center or replace with a recommended low-kickback chain.
≈.050 in.
Fig. 45
≈ .050 in.
Fig. 46
RAKER (DEPTH GAUGE) CLEARANCE
.025 in.
Fig. 47
INSPECT
DRIVE
SPROCKET
Fig. 48
Page 29 — English
MAINTENANCE
SHARPENING THE CUTTERS
See Figures 49 - 52.
Be careful to file all cutters to the specified angles and to the same length, as fast cutting can only be obtained when all cutters are uniform.
WARNING:
The saw chain is very sharp. Always wear protective gloves when performing maintenance to the chain to prevent serious personal injury.
nTension the chain prior to sharpening. Refer to
Adjusting The Chain Tension.
nUse a 3/16 in. diameter round file and holder. Do all of your filing at the midpoint of the bar.
nKeep the file level with the top plate of the tooth. Do not let the file dip or rock.
nUsing light but firm pressure. Stroke towards the front corner of the tooth.
nLift the file away from the steel on each return stroke.
nPut a few firm strokes on every tooth. File all left hand cutters in one direction. Then move to the other side and file the right hand cutters in the opposite direction.
nRemove filings from the file with a wire brush.
NOTICE:
A dull or improperly sharpened chain can cause excessive engine speed during cutting, which may result in severe engine damage.
WARNING:
Improper chain sharpening increases the potential of kickback.
WARNING:
Failure to replace or repair a damaged chain can cause serious injury.
|
CUTTING |
|
|
CORNER |
|
TOP PLATE |
|
SIDE PLATE |
RIVET HOLE |
|
DEPTH GAUGE |
HEEL |
|
TOE |
|
GULLET |
Fig. 49 |
|
|
Fig. 50
Fig. 51
LEFT HAND
CUTTERS
RIGHT HAND |
|
CUTTERS |
Fig. 52 |
|
Page 30 — English