Maintenance Of Saw Chain And Guide Bar - Zenoah G621AVS Owner's/Operator's Manual

F38
F39
50
English

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.
The cutters need to be sharpened when:
• Sawdust becomes powder-like.
• You need extra force to saw in.
• The cut path 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: 73LGX
File size: 0.03 in (0.75 mm)
Place the file on the cutter and push straight forward.
Keep the file position as illustrated. (F38)
After each cutter has been filed, check the depth
gauge and file it to the proper level as illustrated. (F39)
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