[Jim Sims]

Some suggestions: (1) use a quality 6-point socket, 3/4" drive with a long breaker bar and/or "cheater" pipe extension if you can get it, (2) have someone, wearing leather gloves press against the socket to keep it seated, (3) make sure you are squarely registered on the screw head, and (4) another thing to do is to push in the tightening direction and then back in the loosening direction. This last move will sometimes help break the corrosion locking the threads. Good luck! Jim