The 5000 series ran pretty long, and they made some major changes along the way didn't they? Probably should have rebadged it about half way through with all the changes.
The manual I got with my 5200 applies to all the 1000 series, and very little has meaning to my tractor, a late model 5200 with dual power. There is a paragraph after each section, 'except for' and then a few hurried notes about my machine, which is totally different than 85% of the tractors covered by the manual. Very hard to actually learn anything from that manual.