This is the operators manual. It comes in 2 versions, a Red one that is for Snow Trac's, and a White one that is for Snow Master's. I had New, Uncirculated copies of both that I got from Al Gartz the 2nd of the succession of 4 dealers in alaska. Warren has them now. There were more of the Snow Master operator manuals than the Snow Trac Manuals. They didn't have too much useful info, except that it shows the trac tensoining measurement and has a good Lubrication chart. Experience from the US Importer (Twin Pines Equipment) indicated that the tensioning of the Variator Belt was actually not so good in this manual. Looser provides more turning than what was recomended in this manual.