Combines 1660 1020 hopping

Off the top of my head. I believe there is a little arm coming off your potentiometer that has two holes. Check if you are in the correct hole.

Case IH came out with a helper spring kit that mounts to the right end of the header and hooks to the pipe the sensing pads are bolted to. This helps take the stickiness out of the cable. I don't have the part n with me right now but if you want e-mail me I can get it for you.

The leaf type spring underneath the head or the helper springs on the end may be to tight or need a little wd 40 to get stifffness worked out.

You dont give much imfo when the head hops. If it hops when you drop it to the ground it could be that it is dropping too fast and you need to adjust the drop bolt at the valve stack.If you cant get it contact your dealer . Good luck.