I have a twenty year debate with my brother about how often we should change guards and sickles. We don't have any rocks and cut mostly wheat, barley flax and now will be doing soybeans too. How often do you guys change out. We have a 635 D and 974 fd.
Good guards and sections saves wear on wobble boxes and the knife heads. They arent cheap. Our land is sandy so if we need to shave the ground components wear out quickly. Dull sections and a rounded edge on guards and they get changed. My dad hated spending any money on cutting parts, until we put a new knife and guards in the swather the one year. It could actually cut! Now it isn't such a fight.