I would say you need to Undo the clamp on retaining cones. Then unwind them off the axle.
Then put a nut on the end of the axle to protect the threaded end. Then gently tap the axle out. This will push the bearing out with the axle as the axle should have 2 shoulders which sit against the inner bearing races. (I'm assuming this are sealed hubs with cartridge bearings)
You then remove the bearing from the axle. This should just tap off without much fuss. Then put the axle back into the hub and tap the other bearing out the same as the first one.