I just picked up a JD 445 with a 54" Deck. I have a few questions. I want to change the gearbox oil on my deck. How do I get the old oil out, do I just have tip the deck up and have it all run out. Do I suck it out with vac? Also, I think I need to get this deck sandblasted, so I would like to take the Gearbox off. Does it just in pull off when unbolted or is it more complicated? Do I change the oil when it's attached to deck or off? Thanks for any insight you can provide.