Guide Bar Troubleshooting
13. Nose burned at tip from saw chain sliding on rails of sprocket nose guide bar, or from the sprocket being recessed into the tip. Cause: High saw chain tension from automatic saw chain tensioners Symptoms: Nose breakage from bearings wearing quickly and jamming Remedy: Decrease the tension applied by automatic saw chain tensioner 14. Loose or missing nose/ attachment rivets. Cause: Guide bar tip flexing during operation from difficult cutting conditions or accidents Symptoms: Rivets continue to loosen until laminates spread and bearings are lost Remedy: Check rivets every 100 machine hours Rehammer loose rivets and replace rivets if rivet head is missing Always use new rivets
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Safety & Maintenance Manual
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