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READ ALL INSTRUCTIONS BEFORE OPERATING

BASIC SAFETY PRECAUTIONS

DO NOT

rely exclusively upon the safety devices built into the unit. 

DO NOT

allow the unit to be used as a toy. 

• Please read the entire operator’s manual carefully before attempting to assemble, operate or

maintain the unit. 

• Follow all safety instructions. Failure to do so can result in property damage or serious injury to

yourself and/or others. 

• Be thoroughly familiar with the controls and the proper use of the unit. Know how to stop the unit

and disengage the controls quickly.

• Stay alert! Do not operate the unit when tired, ill or under the influence of alcohol, drugs or medication.
• Never allow children to operate the unit. Never allow adults to operate the unit without proper instruction.
• Make sure that all guards and safety attachments are properly installed before operating the unit.
• Keep these instructions. Refer to them often and use them to instruct other users. If loaning

someone this unit, also loan them these instructions.

• Keep bystanders, especially children and pets, at least 50 feet (15 m) away. If anyone enters the

work area, stop the unit!

• Keep the work area clean. Cluttered areas invite injuries. Do not start cutting until the work area is clear

and free from obstructions, there is secure footing and a planned retreat path from falling branches.

• Always wear appropriate eye and ear/hearing protection when operating this unit. Wear safety

goggles, or safety glasses with side shields, that are marked as meeting ANSI Z87.1-1989
standards. Failure to do so could result in serious eye injury caused by thrown or falling objects. If
the operation is dusty, wear a facemask or dust mask. Use a hard hat or other type of safety helmet.

• Dress appropriately, wear heavy, snug-fitting clothes (long pants and a long sleeve shirt), non-slip

protective gloves and steel-toed safety boots. Do not wear loose clothing, jewelry, short pants,
sandals or go barefoot. Secure hair above shoulder level to prevent entanglement in moving parts.

• Only use the unit in daylight or good artificial light.
• Only use the unit for its intended purpose: to cut wood. Only use the unit as described in this

manual. Only use the manufacturer’s recommended attachments with this unit.

•  IMPORTANT SAFETY INSTRUCTIONS  •

PART NO. 769-05042     P01

(03/10)

Operator’s Manual

55cc 2-Cycle Chain Saw

MTD5520

TABLE OF CONTENTS

Service Information  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Know Your Unit  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Assembly Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Oil and Fuel Information  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Starting and Stopping Instructions  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Operating Instructions  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Maintenance and Repair Instructions  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Cleaning and Storage  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Troubleshooting  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Specifications  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Warranty Information  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .E8

DO NOT RETURN THIS UNIT TO THE RETAILER.  PROOF OF PURCHASE WILL BE REQUIRED
FOR WARRANTY SERVICE.

THIS PRODUCT IS COVERED BY ONE OR MORE U.S. PATENTS. OTHER PATENTS PENDING. 
For assistance regarding the assembly, controls, operation or maintenance of the unit, please call the
Customer Support Department. Additional information about the unit can be found on our website.
For service, please call the Customer Support Department to obtain a list of authorized service
dealers near you. Service on this unit, both within and after the warranty period, should only be
performed by an authorized and approved service dealer. When servicing, use only identical
replacement parts.
Before calling for service, locate the unit’s model plate, which lists the model and serial numbers of
your unit. Refer to the sample plate below and copy the information for future reference. 

Copy the serial number here:

Copy the model and parent part numbers here:

DO NOT RETURN THIS

PRODUCT

Please call the Customer Support Department 

or visit our website for assistance:

or

www.mtdproducts.com

DANGER:

Signals an EXTREME hazard.

Failure to obey a safety 

DANGER

signal 

WILL

result in serious injury or death to yourself or

to others. 

WARNING:

Signals a SERIOUS hazard.

Failure to obey a safety 

WARNING

signal 

CAN

result in serious injury to yourself or to others.

CAUTION:

Signals a MODERATE hazard.  

Failure to obey a safety 

CAUTION

signal 

MAY

result in property damage or injury to

yourself or to others.

IMPORTANT!

Signals special mechanical information.

NOTE:

Signals additional important general information.

SYMBOL

MEANING

SAFETY INFORMATION

• SAFETY ALERT SYMBOLS •

Safety alert symbols are used to draw your attention to possible dangers. These symbols, and their

explanations, deserve your careful attention and understanding. The safety warnings do not by

themselves eliminate any danger. The instructions or warnings they give are not substitutes for

proper accident prevention measures. These safety instructions are not meant to cover every

possible condition that may occur. If questions arise, please call the Customer Support

Department at 

1-800-800-7310

(U.S.) or 

1-800-668-1238

(Canada).

SAVE THESE INSTRUCTIONS

All information, illustrations and specifications in this manual are based on the latest product information
available at the time of printing. We reserve the right to make changes at any time without notice.
Copyright© 2009 MTD SOUTHWEST INC, All Rights Reserved.

SERVICE INFORMATION

WARNING:

When using this unit, basic safety precautions should always be

followed to reduce the risk of property damage and personal injury, including the following:

U.S.

1-800-800-7310

Canada

1-800-668-1238

SPARK ARRESTOR NOTE
NOTE: For users on U.S. Forest Land and in the states of California, Maine, Oregon and
Washington. 

All U.S. Forest Land and the state of California (Public Resources Codes 4442 and

4443), Oregon and Washington require, by law that certain internal combustion engines operated on
forest brush and/or grass-covered areas be equipped with a spark arrestor, maintained in effective
working order, or the engine be constructed, equipped and maintained for the prevention of fire.
Check with your state or local authorities for regulations pertaining to these requirements. Failure to
follow these requirements could subject you to liability or a fine. 

This unit is factory equipped with a

spark arrestor. 

If it requires replacement, ask your LOCAL SERVICE DEALER to install the

Accessory Part #753-06268 Muffler.

CALIFORNIA PROPOSITION 65 WARNING

WARNING

THE ENGINE EXHAUST FROM THIS PRODUCT CONTAINS CHEMICALS KNOWN TO THE STATE

OF CALIFORNIA TO CAUSE CANCER, BIRTH DEFECTS OR OTHER REPRODUCTIVE HARM.

Summary of Contents for MTD5520

Page 1: ...rt Department to obtain a list of authorized service dealers near you Service on this unit both within and after the warranty period should only be performed by an authorized and approved service dealer When servicing use only identical replacement parts Before calling for service locate the unit s model plate which lists the model and serial numbers of your unit Refer to the sample plate below an...

Page 2: ...unit with fingers on the throttle control trigger Only pull the starter rope when in the starting position The operator and unit must be in a stable position while starting the engine Refer to Starting and Stopping Instructions Always carry the chain saw by the front handle with the engine off finger off the throttle control trigger the muffler positioned away from the body and the guide bar and s...

Page 3: ...anol will likely damage this engine and void the warranty SAFETY INFORMATION 26 25 5 27 9 12 21 11 4 15 24 1 GUIDE BAR 2 LOW KICKBACK SAW CHAIN 3 CHAIN TENSIONING SCREW 4 SPARK ARRESTER SCREEN 5 CHAIN BRAKE LEVER FRONT HAND GUARD 6 FRONT HANDLE 7 STARTER HANDLE 8 SPARK PLUG 9 AIR FILTER COVER 10 STOP SWITCH 11 SAFETY LATCH 12 BAR LUBE RESERVOIR CAP 13 STARTER COVER 14 FUEL TANK CAP 23 20 2 SAFETY ...

Page 4: ...for air cooled engines along with a fuel additive such as STA BIL Gas Stabilizer or an equivalent Add 0 8 oz 23 ml of fuel additive per gallon of fuel according to the instructions on the container NEVER add fuel additives directly to the unit s fuel tank NOTE Never use engine or carburetor cleaner products in the fuel tank or permanent damage can occur WARNING Gasoline is extremely flammable Igni...

Page 5: ...y weight securely with both feet on solid ground Keep the left arm locked in a straight arm position to withstand any kickback force Fig 15 Keep all body parts to the left of the chain line Fig 15 Make sure the proper grip is established on the front handle and rear handle Do not cut above chest height as a saw held higher is difficult to control against kickback forces BASIC OPERATING CUTTING PRO...

Page 6: ...andard screwdriver Turn the screw clockwise to decrease oil flow or turn the screw counterclockwise to increase oil flow Fig 39 Flats Fig 30 Approx 1 16 1 3 mm Fig 33 Fig 31 Fig 32 Fig 36 Fig 37 Fig 34 Fig 35 WARNING Before inspecting cleaning or servicing the unit stop the engine wait for all moving parts to stop allow the unit to cool disengage the chain brake and disconnect the spark plug wire ...

Page 7: ...r A guide bar with the following faults should be replaced Wear inside the guide bar rails that permits the chain to lay sideways Bent guide bar Cracked or broken rails Spread rails Lubricating the Guide Bar Sprocket Tip NOTE It is not necessary to remove the saw chain to lubricate the guide bar sprocket tip 1 Clean the guide bar sprocket tip 2 Insert the tip of the Lube Gun not included into the ...

Page 8: ...l ventilated space where fuel vapors cannot reach sparks or open flames from water heaters electric motors or switches furnaces etc Never store the unit with fuel in the tank inside a building where fumes may reach an open flame or spark Long term Storage Instructions In addition to the standard storage instructions described above perform the following steps when storing the unit for 30 days or m...

Page 9: ...la clientèle Des informations supplémentaires sont disponibles sur notre site web Pour un entretien ou une réparation veuillez appeler le service à la clientèle pour obtenir une liste complète des concessionnaires agrées près de chez vous L entretien de cet appareil doit être confié exclusivement à un concessionnaire agrée pendant et après la période de garantie Lors de l entretien utilisez unique...

Page 10: ... doivent se trouver dans une position stable sur un sol ferme lors du démarrage du moteur Consultez la section Instructions de démarrage et d arrêt Portez toujours la tronçonneuse par la poignée avant avec le moteur coupé en ne plaçant pas les doigts sur la gâchette de la manette des gaz le pot d échappement éloigné de votre corps et le guide et la chaîne coupante rangés dans le fourreau et dirigé...

Page 11: ...E ÉTINCELLES 5 LEVIER DE FREIN DE CHAÎNE ÉCRAN DE SÉCURITÉ DE LA POIGNÉE AVANT 6 POIGNÉE AVANT 7 POIGNÉE DU DÉMARREUR 8 BOUGIE D ALLUMAGE 9 COUVERCLE DU FILTRE À AIR 10 INTERRUPTEUR D ARRÊT 11 LOQUET DE SECURITÉ 12 BOUCHON DU RÉSERVOIR DE LUBRIFIANT POUR CHAÎNE 13 COUVERCLE DU DÉMARREUR DISPOSITIFS DE SECURITÉ Les numéros précédant les descriptions correspondent aux numéros ci dessus pour vous aid...

Page 12: ...il sans avoir bien revissé le bouchon du réservoir d essence ATTENTION Pour assurer un bon fonctionnement et une fiabilité maximale du moteur suivez à la lettre les instructions de mélange d huile et d essence indiquées sur le bidon d huile pour moteur 2 temps L emploi de carburant mal mélangé peut gravement endommager le moteur AVERTISSEMENT Lorsque vous ajoutez du carburant faites le en extérieu...

Page 13: ...fermement sur le sol Gardez votre bras gauche toujours bien tendu afin de pouvoir encaisser la force d un rebond Fig 15 Gardez tout votre corps à gauche de la ligne de coupe de la chaîne Fig 15 Assurez vous que vous tenez correctement les poignées avant et arrière Ne coupez pas au delà du niveau de votre poitrine car une tronçonneuse tenue plus haute est difficile a contrôler en cas de rebond PROC...

Page 14: ... 32 Fig 36 Fig 37 Fig 34 Fig 35 AVERTISSEMENT Avant de vérifier de nettoyer ou d entretenir l appareil arrêtez le moteur attendez que toutes les parties en mouvement se soient arrêtées laissez le refroidir débrayez le frein de chaîne et débranchez le fil de la bougie d allumage pour vous assurer que l appareil ne peut pas démarrer Le non respect de ces instructions peut entraîner des dégâts matéri...

Page 15: ...s ou cassés Des rails écartés Lubrifier l extrémité du pignon du guide chaîne REMARQUE Il n est pas nécessaire de retirer la chaîne coupante pour graisser l extrémité du pignon du guide chaîne 1 Nettoyez l extrémité du pignon du guide chaîne 2 Insérez l extrémité de l injecteur de lubrifiant non inclus dans le trou de lubrification et injectez la graisse jusqu à ce qu elle apparaisse sur le bord e...

Page 16: ...appareil avec de l essence dans le réservoir à l intérieur d un bâtiment où les vapeurs peuvent entrer en contact avec d éventuelles étincelles ou flammes nues Instructions pour l entreposage de longue durée En plus des instructions de rangement standard décrites ci dessus respectez les étapes suivantes pour entreposer l appareil pendant 30 jours ou plus 1 Videz toute l essence du réservoir en fai...

Page 17: ...mento de Apoyo al Cliente para obtener una lista de distribuidores de servicio autorizados de su localidad El mantenimiento y reparación de este equipo ya sea durante o después del período cubierto por la garantía deben ser realizados solamente por un proveedor de servicios autorizado y aprobado Cuando vaya a dar mantenimiento al equipo utilice solo piezas de repuesto originales Antes de llamar al...

Page 18: ... y golpear al operador o hacerle perder el equilibrio Fig 3 Contragolpe Esta sierra está aprobada por UL como una sierra de Clasificación 1C de acuerdo con la norma CSA Z62 1 03 Está diseñada para que los propietarios de viviendas labradores y campistas la usen con poca frecuencia así como para aplicaciones generales como despejar un sitio podar cortar leña etc No está diseñada para uso prolongado...

Page 19: ...dena de la sierra se desgaste rápidamente y un desgaste excesivo de la barra guía debido a recalentamiento Cuando la cantidad de aceite del motor es insuficiente se nota por el humo la decoloración de la barra guía o la acumulación de paso Llene el recipiente de lubricación de la barra cada vez que llene el tanque de combustible Utilice solo aceite fabricado para trabajar dentro de un amplio rango...

Page 20: ...es de aceite para motores de 2 tiempos El uso de un combustible mezclado indebidamente puede ocasionar serios daños al motor ADVERTENCIA Añada combustible en una zona exterior bien ventilada Limpie de inmediato todo el combustible que se haya derramado Evite crear una fuente de encendido por combustible derramado No arranque el motor hasta que se hayan disipado los vapores del combustible PROPORCI...

Page 21: ...para evitar que se astille Después troce abajo para que los dos cortes se encuentren y evitar el pellizco Trozar troncos totalmente apoyados Cuando el tronco está apoyado a todo lo largo utilice el corte desde arriba trozar arriba teniendo cuidado de no tocar la tierra Fig 25 Trozar arriba Comience a aserrar por encima del tronco con la parte de abajo de la sierra ejerza una presión ligera hacia a...

Page 22: ...ible que quede demasiado apretada al enfriarse Compruebe la tensión en frío antes del próximo uso Plancha de la barra guía Tuercas de retención de la barra Ranura de la barra guía Tornillo de regulación de la cadena Eslabones impulsores de la cadena Rotación de la cadena Dientes de corte Ranura de la barra guía Eslabones impulsores de la cadena Punta de la barra guía Punta de la barra guía Fig 39 ...

Page 23: ...mo tiempo Fig 54 4 Quite la bujía con una llave de cubo para bujías NO USE NINGUNA OTRA HERRAMIENTA 5 Compruebe la abertura de los electrodos con un calibrador de hoja La abertura debe ajustarse a 0 025 pulgadas 0 635 mm Ajuste las aberturas si fuera necesario 6 Vuelva a instalar la bujía con la abertura correcta o si fuera necesario instale una bujía nueva Champion RDJ8J o una equivalente NOTA Se...

Page 24: ...e a raíz del uso o mal uso o la incompetencia para usar el producto Esta garantía limitada no deberá cubrir a ninguna otra persona distinta al comprador original arrendatario original o la persona para la cual se compró en calidad de regalo Relación de las leyes estatales con esta Garantía Esta garantía le confiere derechos legales específicos y puede que usted también tenga otros derechos los cua...

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