GB-15
G3000
G
B
■
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:
91VG
File size:
5/32 in (4.0 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)
8. Maintenance of Saw Chain and Guide Bar
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
Filing angle
Side plate angle
Top plate cutting angle
(25AP) 85
°
(91VG) 80
°
■
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. Such a bar needs to be corrected or re-
placed.
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
Saw Chain
12
848-CB2-2G24
3606-52211
14
848-CB-4G23
2931-52210
