Used Cat Caterpillar D6B Crawler Dozer Welding Tractor Tack Rig

Used Cat Caterpillar D6B Crawler Dozer Welding Tractor Tack Rig. This machine runs perfect, starts right up, uses no oil and has no blow by. I can’t find an hour meter on it, but it appears to have very little use. The Tracks are a little stiff but I believe would loosen up with some more use. The welding machines have been removed, the air compressor does work but has an air leak right now, we’re working on fixing that. Drives and steers perfect. No leaks anywhere. Very strong old machine. Not sure of the year but probably late 60s or early 70s.