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We had a 4 section JD drag harrow like you describe. The evener pulled all 4 sections, or you could take off the outer tubing and brace rod, and pull just 2 sections. You couldn't pull 3 sections with the original evener, you had to make another one to pull 3. We only had the original JD evener that came with the harrow. Nothing worked better than the drag harrow to get the seedbeds in shape in so many different field conditions. They're so simple, no bearings, etc. and required almost zero maintenance. But they wear out, and the teeth get shorter and shorter. I suspect yours would bust clods better, but the teeth are probably worn some. In severe conditions we used to put an old truck tire on each section to hold it down better, that helped some. When we moved ours, we always put it on a trailer to haul it since we would have been moving it over gravel or paved roads for several miles. I wish JD still made these harrows. I'd have a brand new one, no questions asked. To get yours to adjust, you probably just need to straighted out the linkages, etc. Oil up the adjustment handles and pivot areas when you go to use the harrow, they will work much better then. Our harrow had springs, if yours does, be sure they are installed. I don't remember that you could adjust the teeth any farther than perpendicular with the ground, but maybe you could. The teeth pitch adjustment is great since you can set the teeth for less dragging when you have a lot of straw, etc. to work through, or when it might be a little damp. Good luck with your harrow. I bet you'll find a lot of use for it.
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