It still worth trying ......
It's still worth attempting to loosen the backwards spindle and rotate it. Taking the whole chair apart is a last resort. If the spindle can be inserted "backwards" it can also be rotated, since the turned ends are concentric.
The issue will be loosening both the top and bottom at the same time, maybe a job for two people with hot towels. A "steam buggy" or other device which produces a stream of steam could be used to soften the glue.
The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)
Last edited by woodnthings; 04-28-2015 at 09:46 PM.