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6.3- Maintenance of Saw Chain and Guide Bar
6.3.1- Saw Chain
WARNING - It is very important for smooth and safe operation to always keep the cutters sharp.
- Be sure to wear safety gloves.
The cutters need to be sharpened when: - Sawdust becomes powder-like.
Cutter setting standards:
Before filing: - Make sure the saw chain is held securely.
- Make sure the engine is stopped.
- Use a round file of proper size for the chain.
1. Place the file on the cutter and push straight forward. Keep the file position as illustrated.
2. After each cutter has been filed, 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.
3. Make sure every cutter has the same length and edge angles as illustrated.
6.3.2- Guide Bar
- Reverse the bar occasionally to prevent partial wear.
- The bar rail should always be square.
Check for wear of the bar rail. Apply a ruler to the bar and the out side of a cutter.
If a gap is observed between them, the rail is normal. Otherwise, the bar rail is worn.
- You need extra force to saw in.
- The cut path does not go straight.
- Vibration increases.
- Fuel consumption increases.
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