Husqvarna 240, 235 manuel dutilisation Freeing a tree that has fallen badly

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WORKING TECHNIQUES

•Arrangement of branches

•Weight of snow

•Obstacles within the reach of the tree: for example, other trees, power lines, roads and buildings.

•Look for signs of damage and rot in the stem, this makes it more probably that the tree will break and start to fall before you expect it to.

You may find you are forced to let the tree fall in its natural direction because it is impossible or dangerous to try to make it fall in the direction you first intended.

Another very important factor, which does not affect the felling direction but does affect your safety, is to make sure the tree has no damaged or dead branches that might break off and hit you during felling.

The main point to avoid is letting the tree fall onto another tree. It is very dangerous to remove a trapped tree and there is high accident risk. See instructions under the heading Freeing a tree that has fallen badly.

IMPORTANT! During critical felling operations, hearing protectors should be lifted immediately when sawing is completed so that sounds and warning signals can be heard.

Clearing the trunk and preparing your retreat

Delimb the stem up to shoulder height. It is safer to work from the top down and to have the tree between you and the saw.

Remove any undergrowth from the base of the tree and check the area for obstacles (stones, branches, holes, etc.) so that you have a clear path of retreat when the tree starts to fall. Your path of retreat should be roughly 135 degrees away from the intended felling direction. (39)

Felling

WARNING! Unless you have special

! training we advise you not to fell trees with a diameter larger than the bar length of your saw!

Felling is done using three cuts. First you make the directional cuts, which consist of the top cut and the bottom cut, then you finish with the felling cut. By placing these cuts correctly you can control the felling direction very accurately.

Directional cuts

To make the directional cuts you begin with the top cut. Stand to the right of the tree and cut on the pull stroke.

Next make the bottom cut so that it finishes exactly at the end of the top cut. (40)

The directional cuts should run 1/4 of the diameter through the trunk and the angle between the top cut and bottom cut should be 45°.

The line where the two cuts meet is called the directional cut line.This line should be perfectly horizontal and at right angles (90°) to the chosen felling direction. (41)

Felling cut

The felling cut is made from the opposite side of the tree and it must be perfectly horizontal. Stand on the left side of the tree and cut on the pull stroke.

Make the felling cut about 1.5-2 inches (3-5 cm) above the bottom directional cut. (42)

Finish the felling cut parallel with the directional cut line so that the distance between them is at least 1/10 of the trunk diameter.The uncut section of the trunk is called the felling hinge.

The felling hinge controls the direction that the tree falls in.

(43)

All control over the felling direction is lost if the felling hinge is too narrow or non-existent, or if the directional cuts and felling cut are badly placed.

When the felling cut and directional cut are complete the tree should start to fall by itself or with the aid of a felling wedge or breaking bar.

We recommend that you use a bar that is longer than the diameter of the tree, so that you can make the felling cut and directional cuts with single cutting strokes. See instructions under the heading Technical data section to find out which lengths of bar are recommended for your saw.

There are methods for felling trees with a diameter larger than the bar length. However these methods involve a much greater risk that the kickback zone of the bar will come into contact with the tree.

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.

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5451546-93 Rev.4 2008-04-16

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Contents 235 5451546-93 Rev.4 OFF Half Full 49 a 5451546-93 Rev.4 Introduction Symbols on the machineThank you for using a Husqvarna product Dear customerWhat is what on the chain saw? Contents General Safety Precautions Before using a new chain sawFor Canada Personal protective equipment Machine′s safety equipmentAlways use common sense Chain brake and front hand guardCutting equipment Cutting equipment designed to reduce kickback Sharpening your chain and adjusting depth gauge settingGeneral rules BarTensioning the chain Lubricating cutting equipmentFitting the bar and chain General Safety Precautions / AssemblyHappen when the chain touches the operator Chain drive sprocketFuel Fuel safetyFuel Handling FuelingFuel Handling / Starting and Stopping Starting and stoppingBefore use Basic safety rulesWorking Techniques General working instructionsBasic cutting technique Tree felling techniqueFreeing a tree that has fallen badly Carburetor adjustment Working Techniques / MaintenanceHow to avoid kickback GeneralAir filter MaintenanceMuffler Spark plugMaintenance schedule Daily maintenance Weekly maintenance Monthly maintenanceTechnical Data Technical dataRecommended cutting equipment for Canada Bar ChainType Federal Emission Control Warranty Statement Your Warranty Rights and ObligationsKickback safety precautions American Standard Safety PrecautionsSafety precautions for chain saw users Other safety precautionsSymboles sur la machine Cher clientNous vous remercions dutiliser un produit Husqvarna Quels sont les composants de la tronçonneuse? SommaireMesures à prendre avant de mettre en usage une Instructions Générales DE Sécurité Frein de chaîne avec arceau protecteur Utilisez toujours votre bon sensÉquipement de sécurité de la machine AVERTISSEMENT! La plupart desProtection de la main droite Blocage de l’accélérationCapteur de chaîne Système anti-vibrationsÉquipement de coupe anti-rebond Équipement de coupeRègles élémentaires Affûtage et réglage de l’épaisseur du copeau de la chaîneTension de la chaîne Lubrification de l’équipement de coupeInstructions Générales DE Sécurité / Montaje Montage du guide-chaîne et de la chaîneManipulation DU Carburant CarburantRemplissage de carburant Sécurité carburant Transport et rangementRemisage prolongé Démarrage ET Arrêt Démarrage et arrêtMéthodes de travail Techniques DE TravailAvant chaque utilisation Règles élémentaires de sécuritéGénéralités Technique de base pour la coupeAVERTISSEMENT! N’utilisez jamais une TerminologieSolution à un abattage raté Techniques d’abattageMesures anti-rebond Qu’est-ce qu’un rebond?Réglage du carburateur EntretienGénéralités FonctionnementSilencieux Filtre à airBougie Schéma d’entretien Entretien hebdomadaireTous lesCaractéristiques Techniques Caractéristiques techniquesÉquipement DE Coupe Recommandé Pour Canada Guide-chaîne ChaîneVOS Droits ET Obligations EN Garantie Ansi B 175.1-2000 Annexe C Précautions à prendre pour se protéger des rebondsAutres consignes de sécurité AVERTISSEMENT! N’utilisez pas uneIntroducción Apreciado clienteSímbolos en la máquina ¿Qué es qué en la motosierra? Índice Importante Instrucciones Generales DE SeguridadMedidas a tomar antes de utilizar una motosierra nueva Emplee siempre el sentido comúnFreno de cadena con protección contra reculadas Equipo de protección personalEquipo de seguridad de la máquina ¡ATENCIÓN! La mayoría de losProtección de la mano derecha Fiador del aceleradorCaptor de cadena Sistema amortiguador de vibracionesEquipo de corte reductor de reculadas Equipo de corteReglas básicas EspadaTensado de la cadena Lubricación del equipo de corteRepostaje de aceite para cadena de motosierra Instrucciones Generales DE Seguridad / Montaje Montaje de la espada y la cadenaRepostaje Manipulacion DEL CombustibleCarburante Seguridad en el uso del combustibleManipulacion DEL Combustible / Arrenque Y Parada Arranque y paradaReglas básicas de seguridad Técnica DE TrabajoAntes de utilizar la máquina Corte con velocidad de cadena alta, acelerando al máxTécnica básica de corte Técnica de talaTratamiento de una tala fallida Mantenimiento GeneralidadesAjuste del carburador Silenciador Filtro de aireBujía Programa de mantenimiento Datos Tecnicos Datos técnicosEspada Cadena Garantia DEL Sistema DE Control DE Emisiones SUS Derechos Y Obligaciones DE GarantiaPrecauciones de seguridad en reculadas Precauciones DE Seguridad DE LA Norma AmericanaPrecauciones de seguridad para usuarios de motosierras Otras precauciones de seguridad5451546-93 2008-04-16

235, 240 specifications

The Husqvarna 235 and 240 chainsaws are compact, lightweight power tools designed for homeowners and occasional users seeking reliability and performance. Known for their ease of use and versatility, both models are ideal for tasks such as pruning, cutting firewood, and clearing small trees.

One of the main features of the Husqvarna 235 and 240 is their X-Torq engine technology. This innovation reduces fuel consumption by up to 20% while also cutting emissions by approximately 75%. This not only makes the chainsaws environmentally friendly but also saves users on fuel costs over time. The engine's design also enhances torque, providing ample power for cutting through wood efficiently.

Both models come equipped with an inertia-activated chain brake, enhancing safety by preventing unwanted chain movement in case of a kickback. The chain brake is a critical feature for novice users, promoting confidence while operating the chainsaw. This focus on safety extends to the easy-to-reach throttle lockout and combined choke/stop control, allowing for simpler starting procedures.

The Husqvarna 235 and 240 feature an adjustable oil pump, which enables users to control the oil flow to the chain according to their specific needs. This functionality not only prolongs the life of the chain and bar but also helps maintain cutting performance, ensuring smoother operation and reduced wear.

These chainsaws also have ergonomic designs, with comfortable handles that minimize vibrations and allow for prolonged use without fatigue. The lightweight structure makes them easily maneuverable, which is particularly beneficial for tasks that require precision casing or reaching difficult areas.

Another noteworthy characteristic is the Tool-less chain tensioning system. This feature allows users to adjust the chain tension quickly and without the need for additional tools, simplifying maintenance and enhancing user experience.

Overall, the Husqvarna 235 and 240 chainsaws are excellent choices for homeowners seeking reliable, efficient, and easy-to-use tools for light to moderate cutting tasks. With advanced features like X-Torq technology, safety mechanisms, and user-friendly designs, they represent a valuable addition to any gardening or outdoor toolkit.
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