Oregon Maintenance and Safety Manual, MMANUAL-EN AB

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


Safety & Maintenance Manual

Made with FlippingBook - professional solution for displaying marketing and sales documents online