no adjusting holes in the backing plate?
can't stick a thin flat blade screwdriver in and move the lock tab back and de-adjust it?
look close at the backing plate where the adjuster hole is supposed to be, it could be that it was never knocked out but is there. i run across these occasionally.
if you find this to be the case, knock it out, deadjust the wheel, pull the hub and remove the piece knocked out... then go from there.
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.