Builder, do you know how tall International 4400s are? I can't find anywhere that says, but from the pictures I have seen they look much shorter than your dump truck, and if it fits in a 10' door I would think they would fit in a 9' door. If that is the case:
What about finding a used (I'm thinking you don't want to pay what a new one would cost)4x4 International 4400 with an Alison auto that has a 5th wheel on it, and take it off and put a flatbed on. Something like this, or this, but 4x4. That should work for picking up stuff or whatever, for snowplowing, and you could get a 24 or even 30k gooseneck with with air brakes to go with it.
Finding one like that might be too hard/they might cost too much, I don't know. I would think a 550 would do fine with a dual-tandem trailer if that is the way you go, however.
Ed
A 4400 will fit in a 9' door as long as it doesn't have a cab shield. I did look at one. Even found a crewcab 4x4 with Allison, but it was $15,000 over my budget. I don't like some of the IH diesels, either. Especially in a medium duty. The 6L is a boat anchor and the 7.3L V-8 doesn't do anything for me. 6.4L is an improvement. Those are the diesels that were available in my price range. DT-466 is the one to own, narrowing the field even more.
The big problem is there's very few available at a reasonable price. Financing is also VERY costly. If I buy a 550 from a Ford dealer, I can get 5% financing. Maybe when times get better, I will be able to afford the truck you describe. That really is the best choice, just out of reach on budget and practicality right now.
Someday Ed......
Additionally, unless you can convince the local constabulary that the M7040 with loader weighs in under 9000 lbs (which it may); you are looking at at least 8 if not 9 chains and binders to tie down your tractor and batwing on a trailer to DOT spec..
There is more than just weight to consider. Being as you are chaining down 2 pieces of wheeled equipment and a bucket, you will need 4 chains on the tractor, one on the bucket (if equipped) and 4 on the bushhog for a total of 8 or 9 chains.just wondering what kind of chain you are using. When I drove for a well known trucking company we would put that many chains on a 40,000 pound steel coil and be within DOT regulations. You may need to buy bigger chain.
There is more than just weight to consider. Being as you are chaining down 2 pieces of wheeled equipment and a bucket, you will need 4 chains on the tractor, one on the bucket (if equipped) and 4 on the bushhog for a total of 8 or 9 chains.
Aaron Z
Weight is weight. You are just keeping the two units on the trailer. 4 chains and I would be done and have the 9000 pound payload secured to 40,000 pounds. Why would you chain down a loader that is already attached to the tractor?