Pinion stuck onto motor shaft

[Origineelreclamebord]

Like the title mentions... I've got a pinion that's stuck on the shaft of my motor. I managed to move it slightly, but unfortuntely to the wrong side WD40 doesn't seem to help and I don't have a lot of tools at my disposal right now.

I was thinking of taking the motor to the workshop at school, putting the pinion in the bench vice and tapping on the shaft to get it out. I was wondering if you have other ideas to do it?