Maybe they move too freely, hit em' with a hammer and make em' tight
(Not recommended for use on anything except blondes)
Might not help, but my suggestion is to be sure the threads are 100% clean and free of oil residue before applying the loctite. Even the smallest bit of oil on either the nut or adjuster threads can prevent the loctite from bonding. I have had the same problem with the chain drive sprocket on my Stihl pole saw. Its retaining bolt kept coming loose (despite having leaft-hand threads!) until I realized that the threads weren't clean enough for the threadlocker to bond...
Is the washer installed under the nut? Is the clutch ball missing or beat up?
I would also inspect both rods and the ball.Make sure the ends of the rods are not all boogered up.Something is going on in there for sure.