Hi guys,
I went to remove my (left) front brake pad to get a look at the condition.  I have the van on a jack stand with the wheel off.  It looks like I have what the haynes manual calls the "Trever" style calliper: two pins which punch out towarrds the car.  At least, that's how it *should* work.

After removing one pin (the lower one) without trouble, the upper one won't punch out.  I've punched it loose enough that I can turn it with my fingers (or a wrench), and wiggle it back and forth a bit, but can't get it to puch out.  I can't tell what's holding it---it certainly looks like it should come out.  Has anybody had this problem?  Any ideas?

Thanks very much for any suggestions,
Wes
84 1.9l