May be useful (certainly the forum looks as if it will be more productive than here)
http://www.yesterdaystractors.com/cgi-bin/viewit.cgi?bd=ford&th=382489
This looks juicy too:
https://www.slideshare.net/mobile/Projex/new-holland-8670-8770-8870-8970-repair-manual-download
Anon
June 2016