Prepping the Caterpillar D4 fuel tank for a fresh liner and paint! Proper prep is crucial to prevent rust, leaks, and future issues. Watch as we go through cleaning, lining, and paint preparation ...

Getting closer to completion! Watch as I install the radiator and fuel tank on my Caterpillar D4-7U. #DozerBuild #CaterpillarD4 #MachineryRebuild ...

Caterpillar, or CAT as it's known today built some of the earliest tracked vehicles in WWI. Here's how that happened, and how it inspired today's tanks.

Instead of two caterpillar tracks, the Tsar Tank consisted of two large wheels 27 feet in diameter at the front and a smaller five-foot wheel at the back.