Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Mentioned: 22 Post(s)
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If it's the 5mm bolt that goes through the lever to the boss on the frame, no there's no trick except more torque.
It's possible the prior owner had issues with keeping the lever adjusted, and rather than fix it right he resorted to loctite.
Other possible causes include rusting in place when installed dry, or in some cases being forced into threads partly clogged with braze.
It's a standard 5x.8 metric screw, other than cosmetics and the wingnut head. I've seen the wings break off when forced, so your best option is to grab it with pliers using the wing for a purchase and turn it out. If you're careful you might salvage it, otherwise buy a replacement, but use a bottoming or plug tap to clean the thread first.
An ounce of diagnosis is worth a pound of cure.
“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin
“One accurate measurement is worth a thousand expert opinions”
- Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance