I'm sure you've seen this
I have NO idea how different the Fed-2 is to the Fed-4... If they are similar then this
seems like a very good instructions site.
You also have this one that seems to have a number of English Fed manual: Here
FINALLY you have this one
that talks about the various versions of fed 2's.
Hmm..I don't think either of them have an explicit Fed-2 manual though - but maybe by combining the information in them...