I've placed some pictures of the dismantled HP 7906 on Flickr, it's work in
progress I'm cleaning it to get it back in good working order.
http://www.flickr.com/photos/hp-fix/sets/72157634861063988/
-Rik
On Christians advice I let the disc run for a few
hours, at first without
the disc
pack later with a disc pack in place.
After some time the noise faded away, and the spindle motor is running
fine
now, it makes some noise but no vibration any more.
Next thing to do is inspecting the platters for corrosion and other nasty
things..
So at this time I'm not going to dismantle a
spindle motor..
-Rik