John,

You simply pushed the little plunger in too far and it slipped out of
the hole.

Some have had success with a needle or pin by carefully realigning the
plunger with the hole from the outside like you were setting the clock.

Failing that, the clock can be removed, the plunger realigned, and
reinstalled.

There is information about this in the archives.

Mike

John Lauterbach wrote:
> Last weekend I had the battery disconnected to troubleshoot an electrical
> problem.  When I had battery reconnected, I went to reset digital clock.
> When I pushed in with a small rod on the hour button, it would not come
> out.
> The clock is changing the hour number about once per second.
>
> How do I fix or replace.  This clock was part of new instrument cluster
> sold
> about five years ago.
>
> John
>