No, its not all that hard really. Just the 2 13 mm bolts you have to reach through the pulley to get to. One at 12 and one at 6 oclock position. The feed line is held in with a 5/8" and the return line is a hose clamp. Just top it off, reattach the lines, start it up, turn the wheel lock to lock several times and your done.
Most places will loan you the tool for free.....very easy to use......note how the pulley is flush with the stub shaft before removal...when you push it back on with the tool, it should be slush when done....and don't put the pulley on backwards! I have seen it done!