Saw Chain
Mechanical Timber Harvesting Handbook
50
Saw Chain Troubleshooting
Saw chain cuts crookedly/leans to one side/cuts unevenly
21. Damage to cutters on one side of saw chain.
Cause: Cutters on one side of saw chain are damaged by hitting the
saw box or the ground/debris.
Symptoms: Guide bar and saw chain bind in the cut. Could result
in guide bar and saw chain breakage when removing the guide bar
from tree. Uneven guide bar rail wear.
Remedy: File cutters back enough to remove all damage. Square up
guide bar rails if uneven.
Note: Prevent the bar from being bent and touching the saw
box. Always make sure the felling cut is done before moving the
harvester head with the crane.
22. Different cutter top-plate lengths
Cause: Inconsistent sharpening.
Symptoms: Guide bar and saw chain bind in the cut. Could result
in guide bar and saw chain breakage when removing the guide bar
from tree. Uneven guide bar rail wear.
Remedy: File cutters back to even cutter top-plate lengths. Square
up guide bar rails if uneven.
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