I have the calipers off, and the front hub partially disassembled, (removed the C washer, the spring retainer ring, and part of the gear assembly, but I have been unable to finish getting the rotor off to replace it. Apparently I am missing at least one step. Is there an axel nut to remove as well, or maybe something else? Also, the parts website said the hub assembly had to be "pressed" on and off. What does that entail? Thank you!