I work for a Caterpillar dealer and found this thing on their website this evening...
http://www.cat.com/cda/layout?m=69104&x=7

Some points to notice, the front wheel looks like a final drive and sprocket from a hi-drive dozer, such as the D11R in the background. The grill running between the downtubes is similar to the grills on most Cat equipment. The fuel tank has a small grill on it, similar to the back up alarm mount on a dozer fuel tank. The belt drive area resembles the roller frame and final drive of a dozer as well.
And last, but not least, check out the rain cap on the exhaust pipe.

I feel violated.....

More flags More fun!