Did you get an operator's manual with the tractor? I'll wager you'll find the answer to your question there.
Also, there is an LS forum on TBN under "All Other Brands". Other LS owners might provide the info you need.
I take it you're new to tractors. You need to read your manual. If you didn't get a manual, contact the person who sold you the machine, or contact LS (yes, they do have a website).
However you get the manual, read it and learn about your machine before you damage it or hurt yourself.