Tractor Repair: 1953 naa jubilee, rear differential, point hitch

Question
were and how do i get a manual for rear differential with pictures break down.
the lower shaft for the 3 point hitch has come off on right side,
seems the nut or has come off on the inside.
before I break down the assembly I would like to know what to look for

Answer
  I&T tractor manuals are available anywhere tractor manuals are sold.  Online or in a store such as Tractor Supply.  If you just want to see a an exploded view of the parts involved, go to newholland.com and click on parts and services, then select search for parts.  Enter your model in the search box and click search, then select your model from the results.  You will be able to see parts breakdowns for the whole tractor along with the part numbers.