Husqvarna 340 EPA II, 345 EPA II, 350 EPAI manual Air filter, Muffler, Needle bearing maintenance

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MAINTENANCE

Air filter

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

•Carburetor malfunctions

•Starting problems

• Engine power reduction

• Unnecessary wear on the engine parts

• Abnormal fuel consumption

Clean the air filter daily or more often if the air is exceptionally dusty in the working area.

•Disassemble the air filter by

removing the cylinder cover and unscrew the filter. When reassembling, make sure that the filter is tight against the filter holder. Clean the filter by brushing or shaking it.

Muffler

The muffler is designed in order to reduce the noise level and to direct the exhaust

gases away from the operator. The exhaust gases are hot

and can contain sparks, which may cause fire if directed against dry and combustible material. Some mufflers are equipped with a special screen.

If your saw has this type of muffler, you should clean the screen at least once a week. This is done with a wire brush.

CAUTION! The screen must be replaced, if damaged. The saw will be overheated, if the screen is clogged. This results in damage on the cylinder and the piston. Never use a saw with a clogged or defective muffler.

Needle bearing maintenance

• A more thorough cleaning of the filter is obtained by washing it in water and soap.

An air filter, which is used for some time, cannot be cleaned completely. Therefore it must be replaced by a new one, with regular intervals.

IMPORTANT! A damaged air filter must always be replaced.

A Husqvarna chain saw can be equipped with different types of airfilter according to working and weather conditions, season etc.

Spark plug

The spark plug condition is influenced by:

The clutch drum is equipped with one of the following chain sprockets:

•Spur sprocket (A) (the chain sprocket is welded on the drum)

•Rim sprocket (B) (exchangeable)

Both versions have built-in needle bearing at the drive shaft, whitch has to be greased regularly (once a week).

NOTE! Use only high quality bearing grease or engine oil.

A

B

•An incorrect carburetor setting.

•Wrong fuel mixture (too much oil in the gasoline).

•A dirty air filter.

Adjustment of the oil pump (350)

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

If the engine is low on

0,5 mm

power, difficult to start or

 

runs poorly at idling speed,

 

always check the spark plug

 

first. If the spark plug is dirty,

 

clean it and check the

 

electrode gap. Readjust if

 

necessary. The correct gap is

 

0,5 mm (0,020"). The spark

 

plug should be replaced after

 

about a month in operation or

 

earlier if the electrodes are

 

The oil pump is adjustable. Adjustments are made by turning the screw using a screwdriver or combination spanner. The saw is supplied from the factory with the screw set to position 2. Turning the screw clockwise will reduce the oil flow and turning the screw anti-clockwise will increase the oil flow.

 

+

–

2

1

 

3

 

 

badly eroded.

IMPORTANT! Always use the recommended spark plug type. An incorrect spark plug can severely damage the piston/cylinder.

!WARNING! The engine must not be running when making adjustments.

Recommended settings:

Bar 13"-15": Position 1

Bar 15"-18": Position 2

Bar 18"-20": Position 3

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Contents EPA II 350 Symbols KEY to SymbolsEPA ContentsChain SAW Safety Equipment Safety Instructions3a Starting Chain brake and front hand guardChain catcher Throttle lockRight hand guard Vibration damping system Stop switchMuffler Checking the brake trigger Checking brake band wearChecking the front hand guard Checking the inertia brake releaseThrottle lock 5 basic rules Cutting EquipmentSome terms that describe the bar and chain Cutting equipment designed to minimise kickbackBar Saw chainRisk of kickback is increased with a badly sharpened chain Sharpening your chain and adjusting raker clearanceGeneral information on sharpening cutting teeth Sharpening cutting teethSetting the raker clearance General advice on setting raker clearanceTensioning the chain Never use waste oil Lubricating cutting equipmentChain oil Filling with chain oilLubricating the bar tip sprocket Needle bearing maintenanceChecking chain lubrication Checking wear on cutting equipmentWhat is kickback? HOW to Avoid KickbackDo not let go of the handles General rulesNever use the saw one- handed Min m General Safety Precautions10 ft General Working Instructions Basic safety rulesCutting Basic cutting techniqueGeneral TermsFelling direction Tree felling techniqueSafe distance LimbingFelling Clearing the trunk and preparing your retreatFreeing a Trapped tree General adviceFreeing a tree that has fallen badly = high accident risk Cutting the trunk into logsWhat is what? What is WHAT?345/350 AssemblyMounting guide bar and chain 340Fuelmix Fuel HandlingMin 3 m Fuelling10ft Stop Start and Stop Start and stop StartCarburetor MaintenanceTensioning the recoil spring Starter device assemblyStarter device Changing a broken or worn starter cordMuffler Needle bearing maintenanceAdjustment of the oil pump Air filterWinter use Centrifugal cleaning Air InjectionTemperature -5C or colder Cooling systemMonthly maintenance Weekly maintenance Daily maintenanceLong-term storage 340 345 350 Technical DataYour Warranty Rights Obligations Emission Control Warranty Statement2002W49 114 01
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