Husqvarna 445 EPA III, 445e EPA III How to avoid kickback, Freeing a tree that has fallen badly

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WORKING TECHNIQUES

Freeing a tree that has fallen badly

Freeing a ”trapped tree”

It is very dangerous to remove a trapped tree and there is high accident risk.

Never try to fell the tree that is trapped.

Never work in the risk zone of the hanging trapped tree.

The safest method is to use a winch.

•Tractor-mounted

•Portable

Cutting trees and branches that are in tension

Preparations: Work out which side is in tension and where the point of maximum tension is (i.e. where it would break if it was bent even more).

Decide which is the safest way to release the tension and whether you are able to do it safely. In complicated situations the only safe method is to put aside your chain saw and use a winch.

General advice:

Position yourself so that you will be clear of the tree or branch when the tension is released.

Make one or more cuts at or near the point of maximum tension. Make as many cuts of sufﬁcient depth as

necessary to reduce the tension and make the tree or branch break at the point of maximum tension.

Never cut straight through a tree or branch that is in tension!

If you must cut across tree/limb, make two to three cuts, one inch apart, one to two inches deep.

Continue to cut deeper until tree/limb bends and tension is released.

Cut tree/limb from outside the bend, after tension has been released.

How to avoid kickback

WARNING! Kickback can happen very ! suddenly and violently; kicking the chain

saw, bar and chain back at the user. If this happens when the chain is moving it can cause very serious, even fatal injuries. It is vital you understand what causes kickback and that you can avoid it by taking care and using the right working technique.

What is kickback?

The word kickback is used to describe the sudden reaction that causes the chain saw and bar to jump off an object when the upper quadrant of the tip of the bar, known as the kickback zone, touches an object.

Kickback always occurs in the cutting plane of the bar. Normally the chain saw and bar are thrown backwards and upwards towards the user. However, the chain saw may move in a different direction depending on the way it

115 13 81-96 Rev.3 2008-12-16

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Contents EPA III 445e EPA 450e EPA Symbols on the machine KEY to SymbolsSymbols in the operator’s manual You will ﬁnd the following labels on your chain sawContents Dear customer IntroductionWhat is what on the chain saw? What is WHAT?Before using a new chain saw General Safety PrecautionsAlways use common sense Machine′s safety equipmentPersonal protective equipment Chain brake and front hand guardGeneral Safety Precautions Chain catcher Throttle lockoutRight hand guard Vibration damping systemCutting equipment Stop switchMufﬂer General rulesBar Cutting equipment designed to reduce kickbackChain Injuries Some terms that describe the bar and chainGeneral information on sharpening cutting teeth Sharpening your chain and adjusting depth gauge settingTensioning the chain 445e, 450e Lubricating cutting equipmentWhich could lead to serious, even fatal injuries Chain oil Filling with chain oilChain drive sprocket Checking chain lubricationNeedle bearing lubrication Checking wear on cutting equipmentBar Fitting the bar and chain Assembly445 445e, 450eAssembly Fuel Fuel HandlingFueling Fuel safetyTransport and storage Long-term storageStarting and stopping Starting and StoppingStarting Cold engineStopping Working Techniques Basic safety rulesBefore use General working instructionsGeneral rules Terms Basic cutting techniqueLimbing Tree felling techniqueLog is supported at one end. There is a high risk Safe distanceDirectional cuts Felling directionClearing the trunk and preparing your retreat Felling cut Freeing a tree that has fallen badly How to avoid kickbackWhat is kickback? Cutting the trunk into logs General MaintenanceCarburetor adjustment Immediately Checking the inertia brake releaseMufﬂer Tensioning the recoil spring StarterReplacing the starter cord Fitting the starter Air ﬁlterReplacing the return and drive springs Lubricating the bar tip sprocket Spark plugNeedle bearing lubrication Cooling systemWinter use Air Injection centrifugal cleaningTemperature -5C 23F or colder Daily maintenance Weekly maintenance Monthly maintenance Maintenance scheduleTechnical data Technical DataSaw chain ﬁling and ﬁle gauges Bar and chain combinations050/1,3 mm 058/1,5 mmYour Warranty Rights and Obligations Federal Emission Control Warranty StatementSafety precautions for chain saw users American Standard Safety PrecautionsKickback safety precautions Other safety precautionsSímbolos en la máquina Aclaracion DE LOS SimbolosSímbolos en el manual de instrucciones Etiquetas que se encuentran en la motosierraPrecauciones de seguridad para usuarios de IndiceÍndice Apreciado cliente Introduccion¿Qué es qué en la motosierra? ¿QUE ES QUE?Importante Instrucciones Generales DE SeguridadMedidas a tomar antes de utilizar una motosierra nueva Equipo de protección personal Emplee siempre el sentido comúnEquipo de seguridad de la máquina Freno de cadena con protección contra reculadasInstrucciones Generales DE Seguridad Protección de la mano derecha Fiador del aceleradorCaptor de cadena Sistema amortiguador de vibraciones Equipo de corteBotón de parada SilenciadorEquipo de corte reductor de reculadas Reglas básicasEspada CadenaGeneralidades sobre el aﬁlado de los dientes cortantes Generalidades sobre el ajuste de la profundidad de corte Tensado de la cadena Control de la lubricación de la cadena Lubricación del equipo de corteRepostaje de aceite para cadena de motosierra Lubricación del cojinete de agujas Piñón de arrastre de la cadenaControl del desgaste del equipo de corte ¡ATENCION! La mayoría de losMontaje de la espada y la cadena Montaje¡ATENCION! Para manipular la cadena Deben utilizarse guantes protectoresMontaje Carburante Manipulacion DEL CombustibleSeguridad en el uso del combustible RepostajeTransporte y almacenamiento Almacenamiento prolongadoArranque Arranque Y ParadaArranque y parada Parada Antes de utilizar la máquina Tecnica DE TrabajoInstrucciones generales de trabajo Reglas básicas de seguridadReglas básicas Designaciones Técnica básica de corteDistancia de seguridad Técnica de talaDesramado Corte de indicación Dirección de derriboCorte de ramas bajas y camino de retirada Corte de derribo ¿Qué es la reculada? Medidas preventivas de las reculadasTratamiento de una tala fallida Tronzado del tronco Ajuste del carburador MantenimientoGeneralidades Detenerse inmediatamente Control de la función de inerciaSilenciador Tensado del muelle de retorno Mecanismo de arranqueCambio del cordón de arranque Montaje del mecanismo de arranque Filtro de aireCambio del muelle de retorno y el muelle de arrastre Engrase del cabezal de rueda de la espada BujíaLubricación del cojinete de agujas Sistema refrigeranteTemperaturas de -5C 23F o inferiores Depuración centrífuga Air InjectionUtilización en invierno Programa de mantenimiento 445 445e 450e Datos TecnicosAﬁlado y calibres de aﬁlado de la cadena de sierra Combinaciones de espada y cadenaSUS Derechos Y Obligaciones DE Garantia Garantia DEL Sistema DE Control DE EmisionesLista DE Componentes DE LA Garantia DE Control DE Emisiones Precauciones de seguridad para usuarios de motosierras Precauciones DE Seguridad DE LA Norma AmericanaPrecauciones de seguridad en reculadas Otras precauciones de seguridad115 13 81-96 Rev.3 ´z+SF3¶6U¨ 115 13 81-96 Rev.3 1151381-95