Want to know more about your machine? Read a typewriter manual!
Thanks to the plentiful enthusiasts of typewriters, scanned versions of many of the more common typewriters are available at your demand. Here are links to sites that host either service guides or user manuals.
These are free: http://site.xavier.edu/polt/typewriters/tw-manuals.html
Need to buy an out of print service manual? Here you go: https://sellfy.com/twdb