What is a comparable A-C crawler to the CAT D2? Are they easy to find? inexpensive?

Try an h-3 or hd-3, they are a very good
machine.They are direct start,[no pony motor]
most come with a reverser, wide gauge,
bucket or blade[some have six way blade]
Ive seen a hd-3 with blade for sale for 5,000.00 Hope this helps. GLENN

There seems to be nothing comparable to the D2. All have tried, but most have failed.

Eric: You must not know much about allis crawlers,or you have never run an HD-3 or HD-4.

PS on the HD-3. I believe if the D2 was properly set up with the 5-roller frame and big front idler, dozing/grading would be easier than my farm set up D2. However, the HD3 with ripper bar and dozer blade could out work the D2. Even better, an HD3 e/w 3-point with a Gannon scraper e/w ripper teeth. My Kubota L-275 has the Gannon roll-over scraper and it will move dirt quicker than the D2. However, I wouldn't go on the same sidehill L-275 vs. D2. AC made excellent machines, no doubt. I like the looks of the AC-M machine and wonder if they were equipped with blades.

Glenn: I maintained and operated my sisters HD-3 for 10 years. It is equipped with the loader and ripper bar. I've never seen a more hopeless loader arrangement on a machine. SSLLOOOWWW! The iron they put into the loader is enough to make another tractor! I always wanted to suggest taking the loader off, but she was in love with it. I liked the tractor as a tractor, however. I was impressed with the electric start and shuttle bar and am sure the little gal would get some spring in her legs without the massive loader. The D2 is a farming machine and the dozer blade is an afterthought. Ever try grading with a D2? Better hope there is something hard down there or throttle way down in first to make the grade look ok.(and be nimble on the blade control lever) You do know I was semi-joking ( I hope ). I was very impressed with my neighbors JD MC. LOW GEARED made for some good dozing. I'm sure the TD-6 has its' good points as well. Anyway, Just jokin

The M is a neat little Crawler, comes in narrow and wide guage.

I will agree with tony the Model m is a good tractor. Out here in Calif they are still easy to find. The last three I found I paid 1500 for all three.