When you buy the ZZP couple you can get a kit to go with it that will have everything you need. It's a good way to go if you don't have the other things. Comes with a big syringe and hose to get the old oil out and comes with the sealant needed when putting it back together.
Heres what I learned from doing mine
WEAR GLOVES!!!!!! The old oil smells terrible.
Get as much of the oil out as you can. I just put mine in a soda bottle
when you go to take off the snout, be sure to put some rags under it to catch any oil.
