Wurlitzer 1400

Can anybody advise please.
I have a Wurlitzer 1400 that plays and sounds great, the problem i am getting is at the end of the record the arm cancels fine and begins to return but stops half way. I am assuming its just a screw adjustment but which one? I don't want to mess with the settings as everything else works great.
I do have a manual so if anybody can tell me which adjustment it is i will be forever greatful.
Thanks in advance