I never ran a 717... They're just a pukie little cut and throw harvester made for a 60 hp tractor. Your 4020 will probably make ratshit out of it. They also have an offset wagon hitch that pulls directly behind the cutterhead which can be rather dangerous on a steep hill. The 3970 should have an extended length, power tounge and the wagon hitch is inline with the tounge... so if you have to work on a grade you can steer the harvester to avoid a jacknife coming down hill...
If you're not bothing with corn just take every other row of knives out of the Deere and you'll run ti fine. It will work the Deere hard but she should sustain a full feedroll opening (slug) for a short time. The longer chop is better for the cows anyway. You only need the short chop for corn.
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Today's Featured Article - Fasteners: The Nuts and Bolts of Nuts and Bolts - by Curtis Von Fange. The nuts and bolts of nuts and bolts is an interesting and essential piece of knowledge that applies to our older tractors. An improperly torqued capscrew on an engine head or a shear bolt that is too hard on the driving shaft of a bushog can create havoc and make an expensive and uncalled for repair. Let�s examine the purpose and design of these fasteners in order to ensure their proper use. Fasteners are probably one of the aspects of mechanics that is given the least amount of thought.
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