• Make sure the engine is stopped.
• Use a round file of proper size for your chain.
Chain type:
Oregon 91P
File size: 5/32 in (4.0 mm)
Place your file on the cutter and push straight forward.
Keep the file position as illustrated.
After every cutter has been set, 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.
GB | Operating Instructions
Make sure every cutter has the same length and edge
angles as shown below.
Guide bar
• Reverse the bar occasionally to prevent partial wear.
• The guide bar should always be a square. Check for
15
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 guide bar is normal. Otherwise, the guide bar is
worn. Such a bar needs to be corrected or replaced.
1) Appropriate
gauge checker
2) Make the shoul-
der round
3) Depth gauge
standard
4) Cutting length
5) Filling angle
6) Side plate angle
7) Top plate cutting
angle