Rotors are easy after you have done it once or twice its super easy, as long as the loader is handy we can have a rotor out in 20 minutes on the ground. Open side sheild, undo bolts on stop sign, undo sensor cable go into cage area with a pry bar and push rotor out as far as pssible we can usually get 6" put a chain on it and hook up to loader and pull back about 1_2 way, take loader and set bucket on top of loader and wrap chain so it lets rotor come up against bottom of loader and slowly adjust loader so rototr is floating in cage and back up. To install it is reverse, only issue on install is aligning the coupler, sometimes first go sometimes not, A second person helps.(Been a while since an N series but Ithink this covers it)