Probably a TS32
It could be a TS24 but it is most likely a TS32. It is hard to tell without a size reference. Quite the sideboards, 50+ yards if it's a TS32. Euclid did make a TS40 but it was a 3 axel rig, basically a SS40 with a rear GMC 8-71. Years ago J.A. Thompson, later Random Const. had 7 TS32's. I learned to push pull on them. I remember them as being snappy machines with a lot of power. They were easy to load and quicker up the hills then the Cat 657's.....but.....they were still Eucs. The Cats rode better (pre-cushion hitch) and were overall a nicer machine to run.
Probably the most interesting scraper I had the pleasure to run was a TTS14. 6 wheels, 3 engines, 2 scraper bowls. A bit of a handful at first. I ran it on a flat job but have often wondered what it would have been like in the hills with a hairy diveoff. I havn't seen any twin Euclids in years. SS40's are still around but I guess the twins have gone the way of the dinosaurs