Brian
Guest
We had a couple of drive sprokets do the same. We took a hacksaw and cut a vertical slot most of the length of the neck on the sprocket. We cut it perpendicular to the bolt hole. This allowed the sprocket to compress a little and get that bolt a little tighter. Also put a gernerous amount of locktite on shaft before putting on gathering chain sprocket. It worked this year. I doubt you want to buy that shaft if you can help it. To make corn head more aggressive we installed larger drive sprockets (the one in the oil bath). I think the standard sprockets are 12 toothed. Agco has an optional 14 toothed sprocket. Hyper II sold us a 16 toothed sprocket. Also, make sure the sprials out front of the chains are not wore too bad. They don't look too bad until you set one next to a new one. Having those sprials in good shape makes a world of difference when it comes to the aggressiveness of the head.