Seized barrel adjuster on rear mech

Anonymous

Any thoughts on how to unseize? At the moment I can't turn it by hand, only with pliers. I've tried a dab of WD40 in there, but no luck.

I have a feeling this was due to neglect over the winter. Hoping the answer isn't a new mech.

Its a Shimano Ultegra 6500 if that makes a difference.

Thanks

freezing77

Remove cable, remove adjuster completely. Grease or otherwise lubricate thread.
Screw all the way in and out until it becomes looser. Replace cable, re-index gears. Ten minutes tops.

sungod

if you can turn it with pliers, take it out, clean off the corrosion (acf-50 or leave it in some coke for a while), refit

if it's too far gone you should be able to get a spare

smidsy

Also it could be cross threaded. Worst case would be re-tap and re-install.