Hi,it's my first time to adjust my 2003 360 6 strings.
The neck is bowed.The truss rod is without any tension,completely loose.
While I turn it with a nut driver.I found it's too tight.Very hard to turn.
I'm worried about the damage of the truss rod.....
Rusted?Or maybe my wrench is a little short(within the headstock for total length)?
Any suggestions?
Thanks!

Wow, there are a lot of threads about this stuff lately...

OP, you should note that there is more than one truss rod in your Ric.

My suggestion would be to take it to a professional tech who can determine whether or not there is damage, though. There's only so much help the forum can provide you with. Just make sure that he/she is familiar with the Ric two-truss configuration, though.

Is it a Rickenbacker nut driver or another type you are using? As you need to have the correct length tool to get good contact with the nuts. A Rickenbacker wrench is long enough so that you are clear of the head stock. The angle of the nut driver to the nut while turning is straight.

If you are using a tool that does not go past and clear the head stock completely, you will be working at an angle, that's not good!

If you have the correct tool or get one, then perhaps with some light lubrication you may manage to work the nuts back and forth in small increments ( if you are able to do this) then you maybe able to tighten the rods more than they are now. It may help at first to let the lubrication sit on there for a while, then very carefully turn the nuts back then forward. Don't flood the cavity with oil, apply the lubricant sparingly. It would be good to actually take relief measurements using a feeler gauge before you start, if you do get the nut loose, and can adjust the relief these measurement will check your progress. If you are concerned and don't feel confident take it to a good tech as AGNOP suggested.