The seal has two metal edges or lips that keep the rubber seal and spring in place. It looks like they are crimped together when manufactured. This creates a u-shaped channel where there is the rubber ring that actually seals against the shaft and also a small spring.
You can put the screw driver into the seal itself, between one of the edges and the rubber shaft seal. When you push that outer lip towards daylight the inner one should follow right along.
You will notice in the picture that the screwdriver tip is just under the seal lip, between the metal lip and the rubber seal.
You actually don't want the screw driver outside of the seal (if at all possible) because it can gouge the pump body.
Good luck,
Mike
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