Ok so it’s a modern version. We recently added this 75C to our farm. I have always wanted one of these legacy Challengers as the C,D,E series were the last of the true Caterpillar built units before CAT decided to exit the Ag industry and sell the Challenger name to AGCO Corporation. Think of these old flat track units as an Ag tractor that was basically designed and built by a group of dozer engineers. I have managed to put a few hours on already this fall and really enjoy running it! 

 
 
 
 
 

They look better than the new "Big Wheel Drive" Challengers too.

Ooh goody, more farm stuff! I got to drive a 65? a very long time ago. I enjoyed it! Very smooth and agile, you just had to have a steady hand operating. We knew of too many "old hands" that disliked them from minute one, mainly because they were not used to the precise steering. It was neat to hook up to implements, as one did not have to be moving to go left or right; off kilter from the drawbar? Just give the steering a little and the machine went left or right without having to be in gear. I felt like floating with the bogies and air bags.
Covered a lot of ground in a small amount of time! Congrats and thank you for sharing. JM

Neil - Good eye yep late 80s/early 80s GM column.

juiceman - You are correct on the steering and very easy to hook up implements

I’ll try to get some photos of it working along side my fathers 9400T. 
 
 
 

Hi, seyser.
Thanks for the photos and the details. I have never got to run wunna them, only a much later 'big wheel' 875 at a show several years ago at Santa Margarita Ranch. That was somewhat smoother and more responsive than the D9H they had at the time.

I seem to remember that the last 9 of the Cat-built 875s went to Peterson Cat in San Leandro to be 'ice-ized' for Antarctica.

Just my 0.02.

I could get use to one of them. Back here in the east the farms were too small for a tractor like that. We had 90 Milkers back in the day and small acers. (2-3) hundred compared to the ranches you folks have out west. Nice find and it looks really clean. I'd sure like to run one sometime.