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

Excellent idea Reeves. The one thing to be careful about is to be sure
the area around the end of the hole is thick enough. This
idea is an excellent one and you need to be cautious due to the
tremendous pressures that can be generated. I have seen many
cast motorcycle cases crack under the pressure caused by a screw
going into a blind hole being filled by silicone or other
gasket sealers. Just tap carefully at first! Bill Jepson

Reeves Callaway wrote:

Right you are, Bill.  As with any of these 'mechanics tricks' it all
depends on how you hold your tongue...

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