9. Maintenance
MA4
MA5
MA6
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
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
•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 : | 90SG |
File size : | 5/32 in (4.0mm) |
23
