Thanks for all the replies. The problem with going to a dealer is they are 145 miles away. In CNHs infinite wisdom, they have pulled the NH out of all the red tractor dealers. So my local CNH dealer can no longer get me NH parts as they now are a CIH dealer. So I have to mail order parts from another dealer or aftermarket.
Also, I have the owners manual which is listed on the farmers manuals fast site. I need the service manual which goes into much more detail on the knotters and other specs.
I am sure I can go online and order one from a NH dealer, but in my experience with CIH vintage tractor manuals, they suck. Reproductions of reproductions of reproductions at best. There are many other manual companies that offer supperior manuals. I didn"t want to spend $30 and up and get something worthless.