Yep, added several. You can buy units with hydraulic compressors that are self contained. Since its on a tractor. I've put on kits where you make the hoses yourself. They sent me out to Dallas to put one on a 50,000# trac hoe. If you do a regular one, you'll have to put a CONDENSER in front of radiator and run lines all the way to your unit in or on the cab. Self contained units start looking pretty good when you start adding things up. The unit I'm talking about is used on rail road track repair equipment. Just run two hydraulic lines and a hot wire for the fan. Those items can be found at most street corner parts stores. Once I put an international cab on a big Massey Ferguson and used the 68 air unit on the cab. They took it off in 1970 because the air didn't work. She works now.Hello everyone, first time posting, I built a cab for my MX 4700 and I would like to add ac,has anybody added this?any ideas?suggestions? Tha.yep, just get an AC unit