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Al-ko BKS 4040 Manual

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Maintenance of Saw Chain and Guide Bar
441 076_b 43
4. Sprocket
Check for cracks and for excessive wear interfering with the chain drive.
If the wear is considerable, replace it with new one. Never fit a new
chain on a worn sprocket, or a worn chain on a new sprocket.
5. Front and Rear dampers
Replace if adhered part is peeled or crack is observed on the rubber
part. Replace if the inside of the rear damper metal has been beaten by
the stopper bolt and the clearance of the metal increased.
WARNING!
Use only the spare parts which named in this manual. Use the
other spare part can cause serious injury.
MAINTENANCE OF SAW CHAIN AND GUIDE BAR
Saw chain
WARNING!
It is very important for smooth and safe ope-
ration to keep the cutters always sharp.
Your cutters need to be sharpened
when:
Sawdust becomes powder-like
You need extra force to saw in
The cut way does not go straight
Vibration increases
Fuel consumption increases.
Cutter setting standards:
WARNING!
Be sure to wear safety gloves.
Before filing:
Make sure the saw chain is held securely.
Make sure the engine is stopped.
Use a round file of proper size for your chain.
Chain type:
BKS 3835: Oregon 91P
BKS 4040: Oregon 91P
File size: 5/32”(4.0mm) for 91P Place your file on the cutter and push straight forward. Keep the file
position as illustrated.
After every cutter has been set, check the depth gauge and file it to the proper level as illustrated.
WARNING!
Be sure to round off the front edge to reduce the chance of kickback or tie-strap breakage.
Make sure every cutter has the same length and edge angles as illustrated.
… 43 …


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