Maintenance Of Saw Chain And Guide Bar - GGP ITALY SPA P680 Operator's Manual

7. Maintenance of Saw Chain and Guide Bar

8. Maintenance of Saw Chain and Guide Bar
1. Saw Chain
WARNING!
!
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!
!
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
(7/32 in. - 5.6 mm).
Place the file on the cutter and push straight for-
ward.
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.
WARNING!
!
Be sure to round off the
front edge to reduce the chance of kickback
or tie-strap breakage.
It is very important for
Be sure to wear safety
Make sure every cutter has the same length and
edge angles as illustrated.
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 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.
EN 15
(1) Appropriate
gauge checker
(2) Depth gauge
standard
(3) Make the shoul-
der round: 0,3" -
0,75 mm
(A) Cutter length
(30°) Filing angle
(85°) Side plate angle
(60°) Top plate cutting
angle
(1) Ruler
(2) Gap
(3) No gap
(4) Chain tilts