No those are the case breathers, have to remove the cover they are on and the adjustment bolt is underneath. I believe you tighten it down and back it off nine clicks. Check brake pedal travel also, should be around four to five inches. also, they will tighten up as machine warms up.
G'day Wacuda
Go to this previous thread, it has copies of the relevant information that helped me out last year
http://www.acmoc.org/bb/showthread.php?20260-D7E-Brake-and-steering-control-adjustment
Kevin