Husqvarna 55 Rancher manual Air filter, Muffler, Needle bearing maintenance, Spark plug

Page 31

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.

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

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

be replaced by a new one, with regular intervals.

IMPORTANT! A damaged air filter must always be replaced.

Spark plug

The spark plug condition is influenced by:

An incorrect carburetor setting.

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

A dirty air filter.

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

If the engine is low on

 

power, difficult to start or

0,5 mm

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

 

badly eroded.

 

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

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

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Contents Rancher Symbols KEY to SymbolsContents Chain SAW Safety Equipment Safety InstructionsPersonal Protective Equipment 3a 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 oilChain drive sprocket Checking chain lubrication Needle bearing maintenanceChecking wear on cutting equipment Lubricating the bar tip sprocketWhat 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? Mounting guide bar and chain AssemblyFuelmix Fuel HandlingMin 3 m Fuelling10ft Cold engine Start and StopStart StopCarburetor MaintenanceTensioning the recoil spring Starter device assemblyStarter device Changing a broken or worn starter cordSpark plug Needle bearing maintenanceAir filter MufflerCooling system Centrifugal cleaning Air InjectionTemperature 0C or colder Temperature -5C or colderMonthly maintenance Weekly maintenance Daily maintenanceTechnical Data Your Warranty Rights Obligations Emission Control Warranty Statement2002W16 114 01