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9. Maintenance
The bar rail should always be a square.
Check for wear of the bar rail. Apply a ruler
to the bar and the outside of a cutter. If a
gap is observed between them, the rail is
normal. Otherwise, the bar rail is worn. Such
a bar needs to be corrected or
replaced.(MA4)
(1) Ruler
(2) Gap
(3) No gap
(4) Chain tilts
■ SPROCKET
Check for extensive wear, and replace it
when the teeth are worn over 0.3mm. (MA5)
(1) Sprocket
■ SAW CHAIN
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:
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 : 90SG
File size : 5/32 in (4.0mm)
WARNING
WARNING
MA4
MA5
MA6
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