Husqvarna CARB III manual Felling direction, Clearing the trunk and preparing your retreat

Page 28

WORKING TECHNIQUES

Felling direction

The aim is to fell the tree in a position where you can limb and cross-cut the log as easily as possible. You want it to fall in a location where you can stand and move about safely.

Once you have decided which way you want the tree to fall you must judge which way the tree would fall naturally.

Several factors affect this:

Lean of the tree

Bend

Wind direction

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.

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.

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.

D

 

 

 

 

 

 

 

 

 

 

 

a

 

o

 

 

 

 

 

 

direction

n

 

 

 

 

 

 

 

g

 

 

 

 

 

 

 

 

 

 

 

e

 

 

 

 

 

 

 

 

 

 

 

r

 

 

 

 

 

 

 

 

 

 

 

z

n

 

Felling

 

 

 

 

 

 

e

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Retreat path

 

 

 

 

 

 

 

 

 

 

 

 

 

D

 

 

 

 

 

 

 

zone

path

a

 

e

 

 

 

 

n

z

 

Danger

 

 

 

 

 

g

r

 

 

 

 

 

 

 

 

 

o

 

 

 

 

 

 

 

 

 

 

 

n

 

 

 

 

 

Retreat

 

 

 

 

 

e

 

 

 

 

 

 

 

 

 

 

 

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 cut you begin with the top cut. Aim using to the saw’s felling direction mark (1) toward a goal further forward in the terrain, where you would like the tree to fall (2). Stand on the right-hand side of the tree, behind the saw, and cut with a pull stroke.

28 – English

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

Image 28
Contents 435 435e 440e Symbols on the machine KEY to SymbolsSymbols 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 sawMachine′s safety equipment Always use common sensePersonal protective equipment Chain brake and front hand guardGeneral Safety Precautions Chain catcher Throttle lockoutRight hand guard Stop switch Cutting equipmentVibration damping system MufflerGeneral rules Cutting equipment designed to reduce kickbackBar ChainSharpening your chain and adjusting depth gauge setting General information on sharpening cutting teethTensioning the chain 435 435e, 440eLubricating cutting equipment Which could lead to serious, even fatal injuries Chain oilFilling with chain oil Checking chain lubricationNeedle bearing lubrication Chain drive sprocketChecking wear on cutting equipment Assembly Fitting the bar and chain435 435e, 440eAssembly Fuel Handling FuelFuel safety FuelingTransport and storage Long-term storageStarting and Stopping Starting and stoppingStarting Cold engineStopping Basic safety rules Working TechniquesBefore use General working instructionsGeneral rules Basic cutting technique TermsTree felling technique LimbingLog is supported at one end. There is a high risk Safe distanceClearing the trunk and preparing your retreat Felling directionDirectional cuts Felling cut What is kickback? How to avoid kickbackFreeing a tree that has fallen badly Cutting the trunk into logs Carburetor adjustment MaintenanceGeneral Checking the inertia brake release ImmediatelyMuffler Replacing the starter cord StarterTensioning the recoil spring Replacing the return and drive springs Air filterFitting the starter Spark plug Lubricating the bar tip sprocketNeedle bearing lubrication Cooling systemTemperature -5C 23F or colder Air Injection centrifugal cleaningWinter 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 American Standard Safety Precautions Safety precautions for chain saw usersKickback safety precautions Other safety precautionsSímbolos en la máquina Aclaracion DE LOS SimbolosSímbolos en el manual de instrucciones Etiquetas que se encuentran en la motosierra Índice IndicePrecauciones de seguridad para usuarios de Introduccion Apreciado cliente¿QUE ES QUE? ¿Qué es qué en la motosierra?Medidas a tomar antes de utilizar una motosierra nueva Instrucciones Generales DE SeguridadImportante Emplee siempre el sentido común Equipo de protección personalEquipo de seguridad de la máquina Freno de cadena con protección contra reculadas«TIRAR Hacia Atrás Para REINICIAR» Captor de cadena Fiador del aceleradorProtección de la mano derecha Equipo de corte Sistema amortiguador de vibracionesBotón de parada SilenciadorReglas básicas Equipo de corte reductor de reculadasEspada CadenaGeneralidades sobre el afilado de los dientes cortantes Afilado de dientes cortantes Tensado de la cadenaGeneralidades sobre el ajuste de la profundidad de corte 435 Repostaje de aceite para cadena de motosierra Lubricación del equipo de corteControl de la lubricación de la cadena Piñón de arrastre de la cadena Lubricación del cojinete de agujasControl del desgaste del equipo de corte ¡ATENCION! La mayoría de losMontaje Montaje de la espada y la cadena¡ATENCION! Para manipular la cadena Deben utilizarse guantes protectoresMontaje del apoyo de corteza Manipulacion DEL Combustible CarburanteRepostaje Seguridad en el uso del combustibleTransporte y almacenamiento Almacenamiento prolongadoArranque Y Parada Arranque y paradaArranque ¡ATENCION! Antes de arrancar, observe Lo siguienteParada Tecnica DE Trabajo Antes de utilizar la máquinaInstrucciones generales de trabajo Reglas básicas de seguridadReglas básicas Técnica básica de corte DesignacionesDesramado Técnica de talaDistancia de seguridad Corte de ramas bajas y camino de retirada Dirección de derriboCorte de indicación Corte de derribo Tratamiento de una tala fallida Medidas preventivas de las reculadas¿Qué es la reculada? Tronzado del tronco Generalidades MantenimientoAjuste del carburador Control de la función de inercia Detenerse inmediatamenteSilenciador Cambio del cordón de arranque Mecanismo de arranqueTensado del muelle de retorno Cambio del muelle de retorno y el muelle de arrastre Filtro de aireMontaje del mecanismo de arranque Bujía Engrase del cabezal de rueda de la espadaLubricación del cojinete de agujas Sistema refrigeranteUtilización en invierno Depuración centrífuga Air InjectionTemperaturas 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 DE LA Norma Americana Precauciones de seguridad para usuarios de motosierrasPrecauciones de seguridad en reculadas 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