Use a coarse thread tap that corresponds with hole in pilot bearing. Tap it, then thread bolt same size as tap into pilot bearing. If grease is used, that will put even more outward press on pilot bearing. If by chance this doesn't work, use 1/8" or smaller drill bit and drill pilot bearing on either side of hole using stitch pattern working from inside out on both sides of hole, drill holes just far enough apart so that bit does not slide over into previous hole. Then use a chisel on these drilled lines... bearing will come out in 2 pieces.