Make sure you are accessing this file directly from www.steam-brite.comIt seems you are trying to get it from https://steam-brite.com/literature/schematics/index.php?dir=Mytee%2FPartsLists%2F&file=SC-4-PartsList.pdf
Your IP address has been logged.
13.59.111.183 (ec2-13-59-111-183.us-east-2.compute.amazonaws.com)
Here is a link to the directory index the file is in:
http://www.steam-brite.com/literature/schematics/index.php?dir=Mytee/PartsLists/