Husqvarna CARB III How to avoid kickback, Freeing a tree that has fallen badly, What is kickback?

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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

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115 13 80-96 Rev.3 2008-12-17

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Contents 435 435e 440e KEY to Symbols Symbols on the machineSymbols in the operator’s manual You will ﬁnd the following labels on your chain saw EPAContents Introduction Dear customerWhat is WHAT? What is what on the chain saw?General Safety Precautions Before using a new chain sawPersonal protective equipment Machine′s safety equipmentAlways use common sense Chain brake and front hand guardGeneral Safety Precautions Throttle lockout Chain catcherRight hand guard Vibration damping system Stop switchCutting equipment MufﬂerBar General rulesCutting equipment designed to reduce kickback ChainSharpening your chain and adjusting depth gauge setting General information on sharpening cutting teethTensioning the chain 435 435e, 440eFilling with chain oil Lubricating cutting equipmentWhich could lead to serious, even fatal injuries Chain oil Checking chain lubricationChain drive sprocket Needle bearing lubricationChecking wear on cutting equipment 435 AssemblyFitting the bar and chain 435e, 440eAssembly Fuel Handling FuelTransport and storage Fuel safetyFueling Long-term storageStarting Starting and StoppingStarting and stopping Cold engineStopping Before use Basic safety rulesWorking Techniques General working instructionsGeneral rules Basic cutting technique TermsLog is supported at one end. There is a high risk Tree felling techniqueLimbing Safe distanceFelling direction Clearing the trunk and preparing your retreatDirectional cuts Felling cut How to avoid kickback What is kickback?Freeing a tree that has fallen badly Cutting the trunk into logs Maintenance Carburetor adjustmentGeneral Checking the inertia brake release ImmediatelyMufﬂer Starter Replacing the starter cordTensioning the recoil spring Air ﬁlter Replacing the return and drive springsFitting the starter Needle bearing lubrication Spark plugLubricating the bar tip sprocket Cooling systemAir Injection centrifugal cleaning Temperature -5C 23F or colderWinter use Maintenance schedule Daily maintenance Weekly maintenance Monthly maintenanceTechnical Data Technical dataBar and chain combinations Saw chain ﬁling and ﬁle gaugesYour Warranty Rights and Obligations Emission Warranty Parts List Kickback safety precautions American Standard Safety PrecautionsSafety precautions for chain saw users Other safety precautionsAclaracion DE LOS Simbolos Símbolos en la máquinaSímbolos en el manual de instrucciones Etiquetas que se encuentran en la motosierra Indice ÍndicePrecauciones de seguridad para usuarios de Introduccion Apreciado cliente¿QUE ES QUE? ¿Qué es qué en la motosierra?Instrucciones Generales DE Seguridad Medidas a tomar antes de utilizar una motosierra nuevaImportante Equipo de seguridad de la máquina Emplee siempre el sentido comúnEquipo de protección personal Freno de cadena con protección contra reculadas«TIRAR Hacia Atrás Para REINICIAR» Fiador del acelerador Captor de cadenaProtección de la mano derecha Botón de parada Equipo de corteSistema amortiguador de vibraciones SilenciadorEspada Reglas básicasEquipo de corte reductor de reculadas CadenaGeneralidades sobre el aﬁlado de los dientes cortantes Tensado de la cadena Aﬁlado de dientes cortantesGeneralidades sobre el ajuste de la profundidad de corte 435 Lubricación del equipo de corte Repostaje de aceite para cadena de motosierraControl de la lubricación de la cadena Control del desgaste del equipo de corte Piñón de arrastre de la cadenaLubricación del cojinete de agujas ¡ATENCION! La mayoría de los¡ATENCION! Para manipular la cadena MontajeMontaje de la espada y la cadena Deben utilizarse guantes protectoresMontaje del apoyo de corteza Manipulacion DEL Combustible CarburanteTransporte y almacenamiento RepostajeSeguridad en el uso del combustible Almacenamiento prolongadoArranque Arranque Y ParadaArranque y parada ¡ATENCION! Antes de arrancar, observe Lo siguienteParada Instrucciones generales de trabajo Tecnica DE TrabajoAntes de utilizar la máquina Reglas básicas de seguridadReglas básicas Técnica básica de corte DesignacionesTécnica de tala DesramadoDistancia de seguridad Dirección de derribo Corte de ramas bajas y camino de retiradaCorte de indicación Corte de derribo Medidas preventivas de las reculadas Tratamiento de una tala fallida¿Qué es la reculada? Tronzado del tronco Mantenimiento GeneralidadesAjuste del carburador Control de la función de inercia Detenerse inmediatamenteSilenciador Mecanismo de arranque Cambio del cordón de arranqueTensado del muelle de retorno Filtro de aire Cambio del muelle de retorno y el muelle de arrastreMontaje del mecanismo de arranque Lubricación del cojinete de agujas BujíaEngrase del cabezal de rueda de la espada Sistema refrigeranteDepuración centrífuga Air Injection Utilización en inviernoTemperaturas de -5C 23F o inferiores Programa de mantenimiento Datos Tecnicos Datos técnicosCombinaciones de espada y cadena Aﬁlado y calibres de aﬁlado de la cadena de sierraSUS Derechos Y Obligaciones DE Garantia Lista DE Piezas DE LA Garantía DE Emisiones Precauciones de seguridad en reculadas Precauciones DE Seguridad DE LA Norma AmericanaPrecauciones de seguridad para usuarios de motosierras Otras precauciones de seguridad115 13 80-96 Rev.3 115 13 80-96 Rev.3 ´z+SF¶6¢¨ ´z+SF¶6¢¨ 115 13 80-96 Rev.3 1151380-96