AL-KO BKS 4540, Translation Of The Original Operating Instructions

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en
Maintenance of Saw Chain and Guide Bar
44 BKS 4540
3. Spark plug
Clean the electrodes with a wire brush and reset the gap to 0.65mm as
necessary.
Spark plug type: NHSP LD L8RTF or CHAMPION RCJ7Y or NGK
BPMR7A
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 4540: Oregon 21BPX
File size: 4.8mm