first check if it's really leaking from there... if it is, uninstall the noid again and take apart all of its pieces (i mean, take every single one of them off of each other)... also take the piston shaft off. Then, let ALL the parts rest for a day, unmounted, so that their seals can rest and maybe return to their original form. if it's leaking because one of them got deformed over time, this will fix the problem, but if you have some seal damaged there, the only thing you can do is replace that seal or buy a new noid. just remember, clean and relube it again before you reinstall everything.
There is one thing you could do before you spend any money... make sure your lpr parts are in the right position, and change the ram shaft o-ring before you do anything with the noid again.
i actually have a noid here for sale, all parts are good except the center casing where the piston goes into. but try the ram first and retry to work on your noid.
"Ok sportsfan, how bout this? When was the last time you went out on a boat to defend our country? **** you *******. You're a *****, don't talk down to Warbeak like that."