I'd be surprised if they are any different than what goes now, a tapered hole. Simplest method is to undo the nut then get some penetrating oil into the taper and under the seal, prise it up slightly wih the edge of a flat screwdriver, then a few sharp taps to the hub/steering arm should see them pop out.
There are tools for it, forks or V shaped tools to lift it out but the risk is damaging the seal.
I dont seem to find it that easy! I use a (larger than normal) pickle fork wedge and it normally takes a swift strike or two on it to pop. If the joint is going to be replaced then no problem the dust cover is damaged, otherwise I replace the cover.