How do I properly set-up the fertilizer coulter with a rear knife?
Center the blade on the hub, so that it is concentric when it turns. Place the knife top up to the coulter blade; so that the knife and coulter blade just slightly contact each other at the tip. Then as the coulter blade rotates up the knife, you want to have a gradual gap between the knife and coulter blade. Also the knife needs to be centered side to side on the coulter blade.
