Yes, a few of the Euclid TC-12's made it to our neck of the woods. They were a huge machine for the era, and a couple were purchased locally for ripping caprock over limestone, to access the softer limestone for road base and building stone. The caprock had to be blasted previously.
The TC-12 had two separate drivetrains and a pivot at the rear between the frames.
Their weak point was their final drives and tracks, they used to chew them out too fast. In fact, the TC-12 would snap track chains under heavy load once the chains got worn.
The Euclid dozer was born right after GM bought up Euclid from the 5 Armington brothers in Sept 1953.
GM wanted to beat Caterpillar at their own game and Cat got a bit of a fright at GM's entry into the earthmover market, so it made Cat sit up and smarten up their game in 1955.
GM were the biggest and wealthiest corporation in the world in the early 1950's and they had the ability to really decimate Cat's market share - but the Euclids and Terexes never made the dent in Cat sales, that GM thought they would.
The Euclid TC-12 appeared first in 1955 and the Euclid C-6 appeared very shortly afterwards. They both used the same drivetrain, it was like the TC-12 was two C-6's joined together - but the TC-12 was actually designed as a stand-alone design, alongside the C-6 being designed at the same time.
They just used a lot of common components, such as engine and drivetrain. GM management was intent on using their massive design studio to put "styling" into their earthmover product line - but that "styling" effort, especially on the nose of the early Euclids, made for a weak hardnose, so they had to do major redesign work on the nose of the early Euclid tractors.
The TC-12 sold slowly, mainly due to its huge weight and size, and it morphed into the Euclid 82-80 in 1966, before GM had to change the product name to Terex (and Terex 82-80), thanks to a U.S. Govt anti-trust lawsuit.
Once the D9H appeared, it was a match for the TC-12/Terex 82-80, and that along with the TC-12/82-80's weaknesses eventually made sales of the 82-80 taper off.
When the first elevated track D10's appeared, they blew the 82-80 right out of the water.
Here's one of the local TC-12 survivors, it's in a local Heritage Machinery collection. I took the photo in 2009. The tractor is still fully operational. It is impressive to see it operating.
