Help. 04 Freightliner. What is this and how to fix it?

Sorry for the dumb post. Got a good deal on this truck but it needs a few minor things. Figured I would try to fix it all myself. This is my first truck as I transition from company driver to owner op and need a little help. I've searched and searched and cannot find anything on this. What is this thing pictured? It has a couple of lines broken off of it that are slowly dripping what looks like oil. How to fix? Don't even know the name of this to look up info on how to fix it. Thanks in advance

 

Thanks for the info. Now I can at least look up to see if I can find parts for it. Do I just fill that reservoir with grease? It's bone dry but those lines coming off of it are dripping oil

 

Thanks. That would explain the oil looking stuff dripping from the broken lines.. Hopefully it works. I'll try to get all the connections fixed and fill it up with the proper grease and go from there.

 

I'm just going to remove it completely. I put some new connections on and got the hoses back where they should be and it doesn't work. I'll just have to grease it manually from here on out.