VEVOR Electric Grain Mill Grinder, 600W High Power Commercial Spice Grinder, 14 Gal Pulverizer Powder Machine with Galvanized Sharp Blades, for Dry Grains, Spices, Cereals, Coffee, Corn & Pepper

Thank you for your inquiry. To replace the carbon brushes, first unplug the grinder and ensure it is completely powered off. Locate the carbon brush caps on both sides of the motor housing, unscrew the caps, remove the worn brushes, and insert the new brushes in the same orientation. Then reinstall the caps securely before operating the machine. If this answer does not resolve the current issue, please contact us again for assistance.

This product cannot be used to grind sunflower seeds.