The rotor is secured to the hub by a lock-nut that is tightened by an allen key (under the grease boot). The largest socket you will need is for the removal of the caliper (smaller than 22mm, I think). Once removed, hang it away so there is no force on the brake-lines. Also, chech the opperation of the caliper. Rebuild kits are cheep and worth it. Both my front calipers had at least one siezed piston. Remove the bearings from the rotor, clean, chech, transfer, and regrease. Nothing special.

Also a good time to change brake fluid, unless it been done that year already.

ATLD