We took off all the mast winches (5) and rebuilt them.  Only 4 will go back on.  2 per mast.  One winch was a wire only winch, but we are not using wire halyards, so it is not worth keeping.  The winches had not been dismantled in YEARS....probably decades.  The one on the left has been rebuilt(but not re greased yet), the one on the right is as they were, although not too bad.