Husqvarna 250PS manual General advice on setting raker clearance, Sharpening cutting tooth

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SAFETY INSTRUCTIONS

It is very difficult to sharpen a chain correctly without the right equipment. We recom- mend you to use a file gauge. This will help you obtain the maximum kickback reduction and cutting performance from your chain.

!The following faults will increase the risk of kickback considerably.

• FILE ANGLE TOO LARGE

• CUTTING ANGLE TOO SMALL

• FILE DIAMETER TOO SMALL

C. General advice on setting raker clearance

When you sharpen the

cutting teeth you reduce the RAKER CLEARANCE (cutting depth). To maintain cutting performance you must file back the raker teeth to the recommended height.

On a low-kickback cutting link the front edge of the raker lip is rounded. It is very important that you maintain this radius or bevel when you adjust the raker clearance.

We recommend the use of a raker gauge to

B.Sharpening cutting tooth

To sharpen cutting teeth you will need a ROUND FILE and a FILE GAUGE.

1.Check that the chain is correctly tensioned. A slack chain is difficult to sharpen correctly.

2.Always file cutting teeth from the inside face, reducing the pressure on the return stroke.

File all the teeth on one side first, then turn the saw over and file the teeth on the other side.

3.File all the teeth to the same length. When the length of the cutting teeth is reduced to 4 mm (.16") the chain is worn out and should be replaced.

min 4 mm

(0,16")

achieve the correct clearance and bevel on the raker lip.

!WARNING!

The risk of kickback is increased if the raker clearance is too large!

English – 9

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Contents 250PS Symbols KEY to SymbolsContents Safety Instructions Machines safety equipmentPersonal protective equipment Vibration damp- ing system SilencerCutting equip- ment Safety Instructions Cutting equipment Cutting equipment designed to minimise kickbackGuide bar Saw chainGeneral information on sharpening cutting teeth Specification of blade and chainSharpening cutting tooth General advice on setting raker clearanceChain lubrication Tensioning the saw chainCorrection of raker clearance CheckingProcedure if the lubrication does not function Checking wear on cutting equipmentSaw chain Chain drive wheel General safety instructions Fuel safetyStart Basic safety precautions General working instructionsTransport and storage Basic clearing techniques What is what? What is WHAT?Adapter AssemblyFuel Handling Fuel mixFuelling Start and stop Fuel Handling Start and StopConnection of the engine unit Start and StopFitting the harness Removing the harnessCarburettor MaintenanceCleaning/change Correctly adjusted carburettorAir filter MufflerCleaning of the shaft Maintenance scheduleAdjustment of the ball joint Daily maintenanceMonthly maintenance Weekly maintenanceTechnical data Technical DataBar Chain Bar and chain combinations´+HÆh¶6v¨ English English2001W14