Husqvarna CARB III manual Maintenance, General, Carburetor adjustment

Page 32

MAINTENANCE

General

The user must only carry out the maintenance and service work described in this manual. More extensive work must be carried out by an authorised service workshop.

Carburetor adjustment

Your Husqvarna product has been designed and manufactured to specifications that reduce harmful emissions.

Function

•The carburetor governs the engine’s speed via the throttle control. Air and fuel are mixed in the carburetor. The air/fuel mixture is adjustable. Correct adjustment is essential to get the best performance from the machine.

•The T-screw regulates the throttle setting at idle speed. If the T-screw is turned clockwise this gives a higher idle speed; turning it anti-clockwise gives a lower idle speed.

Basic settings and running in

The basic carburetor settings are adjusted during testing at the factory. Fine adjustment should be carried out by a skilled technician.

Rec. idle speed: See the Technical data section.

Fine adjustment of the idling speed T

Adjust the idle speed with the T-screw. If it is necessary to re-adjust, turn the T-screw clockwise while the engine is running, until the chain starts to rotate. Then turn counter- clockwise until the chain stops. A correctly adjusted idle speed setting occurs when the engine runs smoothly in every position. It should also be good margin to the rpm when the chain starts to rotate.

WARNING! Contact your servicing

! dealer, if the idle speed setting cannot be adjusted so that the chain stops at idle. Do not use the chain saw until it has been properly adjusted or repaired.

Correctly adjusted carburetor

When the carburetor is correctly adjusted the machine accelerates without hesitation and the machine 4-cycles a little at max. speed. It is also important that the chain does not rotate at idle. If the L-jet is set too lean it may cause starting difficulties and poor acceleration. If the H-jet is set too lean the machine will have less power, poor acceleration and could suffer damage to the engine.

Checking, maintaining and servicing chain saw safety equipment

Note! All servicing and repair work on the machine requires special training. This is especially true of the machine′s safety equipment. If your machine fails any of the checks described below we recommend you to contact our servicing dealer.

Chain brake and front hand guard

Checking brake band wear

Brush off any wood dust, resin and dirt from the chain brake and clutch drum. Dirt and wear can impair operation of the brake.

Regularly check that the brake band is at least 0.024 inch (0.6 mm) thick at its thinnest point.

Checking the front hand guard

Make sure the front hand guard is not damaged and that there are no visible defects such as cracks.

Move the front hand guard forwards and back to make sure it moves freely and that it is securely anchored to the clutch cover.

32 – English

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

Page 31 Page 33
Image 32
Page 31 Page 33
Contents 435 435e 440e Symbols in the operator’s manual KEY to SymbolsSymbols on the machine 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 Right hand guard Throttle lockoutChain catcher 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 lubricationChecking wear on cutting equipment Chain drive sprocketNeedle bearing lubrication 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 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 Checking the inertia brake release ImmediatelyMuffler Tensioning the recoil spring StarterReplacing the starter cord Fitting the starter Air filterReplacing the return and drive springs Spark plug Lubricating the bar tip sprocketNeedle bearing lubrication Cooling systemWinter use Air Injection centrifugal cleaningTemperature -5C 23F or colder 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 el manual de instrucciones Aclaracion DE LOS SimbolosSímbolos en la máquina Etiquetas que se encuentran en la motosierra Precauciones de seguridad para usuarios de IndiceÍndice Introduccion Apreciado cliente¿QUE ES QUE? ¿Qué es qué en la motosierra?Importante Instrucciones Generales DE SeguridadMedidas a tomar antes de utilizar una motosierra nueva 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» Protección de la mano derecha Fiador del aceleradorCaptor de cadena 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 Generalidades sobre el ajuste de la profundidad de corte Tensado de la cadenaAfilado de dientes cortantes 435 Control de la lubricación de la cadena Lubricación del equipo de corteRepostaje de aceite para cadena de motosierra 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 DesignacionesDistancia 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 Control de la función de inercia Detenerse inmediatamenteSilenciador 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 Bujía Engrase del cabezal de rueda de la espadaLubricación del cojinete de agujas Sistema refrigeranteTemperaturas de -5C 23F o inferiores Depuración centrífuga Air InjectionUtilización en invierno 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
Top Page Image Contents