http://www.google.com/url?sa=t&rct=j&q=how%20to%20replace%20hirschmann%20antenna%20mast&source=web&cd=1&cad=rja&ved=0CD4Qt wIwAA&url=http%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DLiE1PTJHEJM&ei=N2kRUu-ENq__4APOroHwBg&usg=AFQjCNG_mUa6XKZjTOdjsqPgGSzHKvFwDA

Or just google "how to replace hirschmann antenna mast".