Front-derailleur bolt undoing: pliers and threadlocker When I unscrew the front derailleur bolt to adjust the cable (wrapping around B and C), the entire parallelogram rotates.



Part A: What is the appropriate way to unscrew the bolt?


Hold the parallelogram in place with a pair of pliers, or
Just rotate. The hinges in the front derailleur are designed to take the torque for removing/tightening the cable.


Part B: True or False: Since there is threadlocker applied to this bolt, there is no such a thing as a minor adjustment (unwind a little, set the cable right, wind back). The threadlocker must be re-applied, and so it's anyway necessary to first remove the bolt completely.

This is a sequel question.
Just push the cage inward with your hand while undoing the bolt. Use a wad of rag to protect you hand or wear a heavy duty work glove. If you use a pair of pliers you'll scratch the finish.