For parts go to Max6x6.com | Max Atv Parts | Mudd-Ox Atv To tension chains all the wheels must be off the ground. The front and center chains Use piece of wood to push down on the idler sprockets then retighten them. The primaries are adjusted in the back by the 3/4" adjustment nuts. To change trans fluid use a suction gun with a 1/4" flexible hose. It's a bit of a pain but not too bad once you've done it a time or two. Just make sure the vent plug goes back it the top and refill it with a long flexible funnel until it runs out the bottom hole. That's the fill line. Hope this helps, enjoy your new toy.
What it lacks in ground clearance it makes up for with traction.