Husqvarna 966906738, 966906636, 965084001 Air filter, Spark plug, Lubricating the bar tip sprocket

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MAINTENANCE

Tensioning the recoil spring

Hook the starter cord in the notch in the pulley and turn the starter pulley about 2 turns clockwise.

Note! Check that the pulley can be turned at least a further 1/2 turn when the starter cord is pulled all the way out. (104)

Stretch the line with the handle. Move your thumb and release the line. See the figure below. (105)

Replacing the return and drive springs

Recoil spring (A)

Lift up the starter pulley. See instructions under the heading Changing a broken or worn starter cord. Remember that the recoil spring is coiled under tension in the starter housing.

Remove the cassette with the recoil spring from the starter.

Lubricate the recoil spring with light oil. Fit the cassette with recoil spring in the starter. Fit the starter pulley and tension the recoil spring.

Drive disc spring (B)

Undo the bolt in the centre of the pulley and remove the drive disc and the drive disc spring.

Replace the drive disc spring and fit the drive disc above the spring. (106)

Fitting the starter

To fit the starter, first pull out the starter cord and place the starter in position against the crankcase. Then slowly release the starter cord so that the pulley engages with the pawls.

Fit and tighten the screws that hold the starter.

Air filter

The air filter must be regularly cleaned to remove dust and dirt in order to avoid:

Carburettor malfunctions

Starting problems

Loss of engine power

Unnecessary wear to engine parts.

Excessive fuel consumption.

Remove the air filter after taking off the air filter cover. When refitting make sure that the air filter seals tightly against the filter holder. Clean the filter by brushing or shaking it. (107)

The filter can be cleaned more thoroughly by washing it in water and detergent.

An air filter that has been in use for a long time cannot be cleaned completely. The filter must therefore be replaced with a new one at regular intervals. A damaged air filter

must always be replaced.

A HUSQVARNA chain saw can be equipped with different types of air filter according to working conditions, weather, season, etc. Contact your dealer for advice.

Spark plug

The spark plug condition is influenced by:

Incorrect carburettor adjustment.

An incorrect fuel mixture (too much or incorrect type of oil).

A dirty air filter.

These factors cause deposits on the spark plug electrodes, which may result in operating problems and starting difficulties.

If the machine is low on power, difficult to start or runs poorly at idle speed: always check the spark plug first before taking any further action. If the spark plug is dirty, clean it and check that the electrode gap is 0.5 mm. The spark plug should be replaced after about a month in operation or earlier if necessary. (108)

Note! Always use the recommended spark plug type! Use of the wrong spark plug can damage the piston/cylinder. Check that the spark plug is fitted with a suppressor.

Lubricating the bar tip sprocket

Lubricate the bar tip sprocket each time you refuel. Use the special grease gun and a good quality bearing grease.

(109)

Needle bearing lubrication

The clutch drum has a needle bearing on the output shaft. This needle bearing must be lubricated regularly.

When lubricating, remove the clutch cover by loosening the two bar nuts. Lay the saw on its side with the clutch drum upwards.

Lubrication involves engine oil dripping into the centre of the clutch drum as it rotates. (110)

28 – English

1153136-26 Rev.1 2009-12-29

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Contents 445 445e 450e English 1153136-26 Rev.1 3839 4243 1153136-26 Rev.1 English 102 KEY to Symbols Symbols on the machineSymbols in the operator’s manual Decompression valve The valveContents Introduction What is what on the chain saw?Dear Customer General Safety Precautions Before using a new chain sawMachine′s safety equipment Always use common sensePersonal protective equipment Chain brake and front hand guardStop switch Throttle lockoutChain catcher Vibration damping systemSharpening your chain and adjusting depth gauge setting Cutting equipmentGeneral rules Cutting equipment designed to reduce kickbackTensioning the chain Lubricating cutting equipment Bar Assembly Fitting the bar and chain445 445e, 450eFuel Handling FuelFuel safety FuellingTransport and storage Long-term storageStarting and Stopping Starting and stoppingStarting Cold engineStopping Basic safety rules Working TechniquesBefore use General working instructionsTerms Basic cutting techniqueLimbing Tree felling technique What is kickback? How to avoid kickbackFreeing a tree that has fallen badly Carburettor adjustment MaintenanceGeneral Muffler StarterRight hand guard Replacing the starter cordAir filter Spark plugLubricating the bar tip sprocket Needle bearing lubricationAir Injection centrifugal cleaning Temperature -5C or colderCooling system Winter useMaintenance schedule Daily maintenance Weekly maintenance Monthly maintenanceTechnical Data Technical dataBar and chain combinations Saw chain filing and file gaugesEC-declaration of conformity Applies to Europe only EN ISO 12100-22003, Cispr 122005, EN ISOEnglish 1153136-26 Rev.1 1153136-26 Rev.1 English Original instructions 1153136-26