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F11-1
F11-2
46
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11. Maintenance of Saw Chain and Guide Bar
■ SAW CHAIN
WARNING
It is very important for smooth and safe operation
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: 91SG
File size:
Place your file on the cutter and push straight forward.
Keep the file position as illustrated. (F11-1)
After every cutter has been set, check the depth gauge
and file it to the proper level as illustrated. (F11-2)
WARNING
Be sure to round off the front edge to reduce the
chance of kickback or tie-strap breakage.
(1) Appropriate gauge checker
(2) Make the shoulder round
(3) Depth gauge standard
3.9mm
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