Maintenance Of Saw Chain And Guide Bar - Zenoah G6200 Owner's Manual

8. Maintenance of Saw Chain and Guide Bar

■ Saw Chain
WARNING
• It is very important for smooth and safe operation
to always keep the cutters 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 the chain.
Chain type: 73LGX
File size: 7/32 in. (5.6 mm)
Place the file on the cutter and push straight forward.
Keep the file position as illustrated.
After each cutter has been filed, check the depth gauge
and file it to the proper level as illustrated.
Appropriate gauge checker
Make the shoulder round
Depth gauge standard
0.025" (0.64 mm)
WARNING
• Be sure to round off the front edge to reduce the
chance of kickback or tie-strap breakage.
Make sure every cutter has the same length and edge
angles as illustrated.
Cutter length
■ 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 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.
Ruler
Gap
No gap
Chain tilts
WARNING
• This saw is equipped with one of the following
low kickback bar/chain combinations:
Zenoah Part Number
Bar Size Guide Bar
20 3674-52114
24 3679-52103
G6200
Filing angle
Side plate angle
Top plate cutting angle
Saw Chain
848CC3LG72
848CC3LG84
GB-13
G
B