If you've downloaded any type of Winnebago PDF file that you can't open 
  without a password or can't resave, print, or otherwise make any sort of 
  changes to the document, then it is probably a protected document and you'll 
  need the password in order to make any changes.
  Try these and see if they work:
  
    In order to open a protected document, enter the user password "info".
    In order to make changes to a protected document, enter the master 
    password "service".
  
  Note that these passwords were used only on service and information type 
  documents. Other documents coming from the administrative and corporate 
  offices may have different passwords and are probably not of any interest to 
  the regular owner anyhow.
  It should be noted that prior to the Spring of 2006, almost all of the 
  folders within the Winnebago web site could be browsed without displaying a 
  specific html document. This happens when the permissions of the folder on the 
  server has not been properly set which basically opens it up for the whole 
  world to see. This has now been changed on practically all folders for the 
  Winnebago web site probably due to a network technician noticing an 
  unauthorized browsing of the folders which was probably me. Any attempt to 
  browse the folders now returns a "Forbidden" error which is the proper 
  protocol for web servers. I'm sort of glad to see that they finally got it 
  right but I will miss my easy source.