Just taking the gland nut off will require a torch (to heat up to break the locktite), a spanner wrench to fit the nut, braker bars and cheaters roughly 6 feet long, and a metal table substantial enough to hold everything in place to work on it. Then you'll have to hook up either hydraulics or pneumatics to push the plunger out, and be able to catch that without damaging it. More heat and wrenching, then it's time to bust out the indicators and mics to see what's actually going on with it. You'll then fight the seals and rings, installed with the proper assembly grease/oil, and will have to torque components to their required values, which you'll have to look up. Fun fun lol