Reeves Callaway wrote:

There is an old trick for getting a hollow dowel, a 'sleeve' dowel, out
of its hole, assuming the hole is blind.
The method is to 'hydraulic' it out.
Fill the hole approx. 2/3 with a stiff grease.
Take a close fitting straight punch that will just nest inside the i.d.
of the sleeve  ( in this case , the roll pin)
A smart strike on the punch will shock the 'fluid' and drive the sleeve
in the only way it can go-  up and out.
I've used it many times and it really works as long as the tolerances
are reasonably tight.  The problem here may be that the roll pin has a
split that would allow the escape of the energy.  Probably worth a try.

Reeves Callaway

 
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