Husqvarna 250PS manual Cutting equipment designed to minimise kickback, Guide bar, Saw chain

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SAFETY INSTRUCTIONS

5. Cutting equipment

This section describes how through correct maintenance and through using the right type of cutting equipment you can:

Obtain maximum cutting capacity.

Increase the service life of the cutting equipment.

A. Only use cutting equipment recommended by us! See the ”Technical data” section.

B. Keep the chain cutting teeth properly sharpened! Follow our instructions and use the recommended file gauge. A damaged or badly sharpened chain increases the risk of accidents.

C. Maintain the correct raker clearance! Follow our instructions and use the recommended raker gauge. Too large a clearance increases the risk of kickback.

D.Keep the chain properly tesioned! If the chain is

slack it is more likely to jump off and lead to increased wear on the bar, chain and drive sprocket.

E. Keep cutting equip- ment well lubricated and properly main- tained! A poorly lubricated chain is more likely to break and lead to increased wear on the bar, chain and drive sprocket.

!WARNING!

Never use a machine with defective safety equipment. The safety equipment should be maintained as described in this section. If your machine does not meet any of these controls you should contact your service workshop.

Cutting equipment designed to minimise kickback

!WARNING!

Faulty cutting equipment or the wrong combination of bar and chain increases the risk of kickback. Use only the bar and chain combinations recommended in the ”Technical data” section.

The only way to avoid kickback is to make sure that the kickback zone of the bar never touches anything.

By using cutting equipment with “built-in” kickback protection and keeping the chain sharp and well-maintained you can reduce the effects of kickback.

Guide bar

The smaller the tip radius the smaller the kickback zone and the lower the chance of kickback.

Saw chain

A saw chain is made up of a number of links, which are available in standard and low-kickback versions.

None

Standard

Low-kickback

Cutting link

Drive link

Side link

Combining these links in different ways gives different degrees of kickback reduction. In terms of kickback reduction alone, four different types of link are available.

Kickback reduction Cutting link Drive link

Side link

Low

Standard

High

Extra high

English – 7

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Contents 250PS Symbols KEY to SymbolsContents Machines safety equipment Safety InstructionsPersonal protective equipment Silencer Vibration damp- ing systemCutting equip- ment Safety Instructions Saw chain Cutting equipment designed to minimise kickbackCutting equipment Guide barGeneral information on sharpening cutting teeth Specification of blade and chainSharpening cutting tooth General advice on setting raker clearanceChecking Tensioning the saw chainChain lubrication Correction of raker clearanceChecking wear on cutting equipment Procedure if the lubrication does not functionSaw chain Chain drive wheel Fuel safety General safety instructionsStart General working instructions Basic safety precautionsTransport and storage Basic clearing techniques What is what? What is WHAT?Adapter AssemblyFuel mix Fuel HandlingFuelling Start and stop Fuel Handling Start and StopRemoving the harness Start and StopConnection of the engine unit Fitting the harnessCarburettor MaintenanceMuffler Correctly adjusted carburettorCleaning/change Air filterDaily maintenance Maintenance scheduleCleaning of the shaft Adjustment of the ball jointMonthly maintenance Weekly maintenanceTechnical data Technical DataBar Chain Bar and chain combinations´+HÆh¶6v¨ English English2001W14