10.3 SHARPEN THE CUTTERS
Sharpen the cutters if chain does not go into wood easily.
NOTE
We recommend that a service center, which has an electric
sharpener, perform important sharpening work.
1. Tensioning chain.
2. Sharpen the cutters corner with a 5/32 in. (4 mm)
diameter round file .
3. Sharpen the top plate, side plate and depth gauge with a
flat file.
4. File all the cutters to the specified angles and the same
length.
NOTE
During the process:
•
Keep the file flat with the surface to be sharpened.
•
Use the midpoint of the file bar.
•
Use light but firm pressure when sharpening the
surface.
•
Lift the file away on each return stroke.
•
Sharpen the cutters on one side and then move to the
other side.
Replace the chain if:
•
The length of the cutting edges is less than 1/5 in. (5
mm).
•
There is too much space between the drive links and the
rivets.
•
The cut speed is slow.
•
Sharpening the chain many times but it does not increase
the cutting speed. The chain is worn.
10.4 GUIDE BAR MAINTENANCE
NOTE
Make sure that the bar is turned over periodically to keep
symmetrical wear on the bar.
1. Lubricate the bearings on the nose sprocket (if present)
with the syringe (not included).
2. Clean the bar groove with the scraping hook (not
included).
3. Clean the lubrication holes.
4. Remove burr from the edges and level the cutters with a
flat file.
Replace the bar if:
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