Did you install the truss rod from the peg head or the heel ? Also did you just place the rod in its slot and glue the fingerboard on top, or routed the TR slot deeper and glued a filler strip on top ?
The worst answer here can be that you will have to remove your fingerboard. To do that, you have to use heat on the fingerboard to melt the glue between the fingerboard and the neck and slowly remove it. An Iron with steam setting, or a good clothes steamer can heat and loosen the glue between the fretboard and the neck. Once its off, replace the truss rod.
The best answer can be that if you can try to maybe glue an allen key into the broken TR nut with epoxy or threadlock and try to pull the rod out from the heel or the pedhead. This will only work if -
- you didn't previously use a filler strip or used wood to fill the gap above the TR nut.
- your TR was not super tight in its slot, OR
- some of the glue from the fingerboard didn't seep into the TR slot and glue part of the rod to the neck.
Best of luck.
Last edited by suraj : 10-10-2013 at 02:15 PM.