Oregon Maintenance and Safety Manual, MMANUAL-EN AB

Saw Chain Troubleshooting

4. Too little top-plate filing angle. Cause: Filed or ground at less than the recommended angle. Symptoms: Slow cutting. Requires extra effort to cut. Possible binding in cut. Remedy: Resharpen cutters while holding the file at the correct top-plate filing angle for the saw chain. Be sure the file guide is stamped with the saw chain’s correct top-plate angle. 5. Too much top-plate cutting angle. Cause: File held too low or file is too small. Grinders: Saw chain ground at the wrong top- plate cutting angle or using an incorrectly-sized grinding wheel. Symptom: Poor stay-sharp. Rapid dulling. Cuts fast for a short time, then dulls. Remedy: Resharpen cutters with the correct file in the right size, held in the correct position. Use correct file guide. 6. Too little top-plate cutting angle. Cause: File held too high or file is too large. Grinders: Saw chain ground at the wrong top plate cutting angle or an incorrectly sized grinding wheel. Symptoms: Slow cutting. Premature wear to saw chain and guide bar rails. Remedy: Resharpen cutters using the correct file guide that is the right size and in the correct position. 7. Too much hook in the side plate. Cause: File held too low or the file is too small. Grinders: Saw chain ground at the wrong top- plate cutting angle, grinding wheel is too small or is grinding too deep into the body of cutter. Symptoms: Rough cutting. Saw chain grabs. Cutters dull quickly or won’t hold cutting edge. Top plate breakage and/or saw chain stretch. Remedy: Resharpen cutters using the correct file in the right size held in the correct position.

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Safety & Maintenance Manual

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