We're talking about 2 different books here. The one with the info you need is the operator's manual, it comes FREE with the tractor when you get it new, or if you got it used, I guess you can download it for free from the website. That is the one that has the information you are looking for. The $300 manual is the service manual. These are used by the shops or mechanics when doing extensive repairs and overhauls. All you need is the operator's manual to get things adjusted back to the way they should be.
George