front nuckle spindle 4x4 1610TS

[Rambo]

I was feeling the front nuckle spindle with gear oil and noticed this morning that it had leaked out. Seems to be coming from the hub area. I took off the nuckle spindle side and I saw a big gear in a couple wheel bearings. I was just wondering is there a seal behind the hub or is it just a wheel bearing? And also, how do I get these apart to get to the hub area? Thanks, Rambo