u mean you are looking for a tractor with a backhoe or front loader.that's what it's called in US. a CAT(short for caterpillar, a john deere, or a Kubota).
Ah, the JCB. I ran one of those in Reno. It was an underpowered tinkertoy compared to the John Deere 710 I was used to operating. I guess all of the other guys covered the American terms but even better yet a description of what you want to do would be better as different "JCBs" do different jobs: Backhoe - usually rubber tired with a bucket on the front and a bucket on the back for trenching. Not very useful for grading a lot because the hoe bobbing around on the back makes smooth running difficult and every bump is magnified which produces another bump in the finish grade which the tractor runs over and bounces again. I would compare it to a bumblebee - not very graceful, but it has it's place mostly because it can transport itself and setup almost anywhere. Excavator / trackhoe - A tractor where the cab spins on it's axis. Sometimes has a blade on one end that can be used for stabilizing on uneven surfaces or back-filling. Has a bucket for trenching but can also be used for rock-splitting and compacting with proper attachments. Front End Loader - A versatile machine with a bucket large enough to scoop up a multicab on the front end. Great for blending and screening materials and grading a lot with if you don't have a blade (below). With this one machine you can cut and fill a bulding pad. If it weighs enough and the lifts are thin enough, you can achieve proper compaction with it. Motorgrader/ grader / blade - generally used for finishing touches, not good in tight spaces, but a versatile machine due to the articulation of the frame, the ability to lean the wheels, the ability to spin the blade 360 degrees, the ability to tilt the blade forward and back to cut a lot or blue-top (feather). If you have a wide open lot with few obstacles and want to push all of your material to one spot to be scooped up with the front-end loader, this is perfect. Not really good for compaction, but makes things look pretty. Roller / Compactor - a roller can compact, but a compactor does not general roll things smooth. A compactor might have a blade on the front fro moving material, but you will need to follow it up with something to make it smooth due to the "sheep;s foot" prints it leaves behind For us Yankees, a plant is a facility such as a batch plant which could produce cement and would be called a batch plant or AC (asphaultic concrete) If you were looking for a company to do the work, then you would seek out an "Excavation contractor". The guy driving it would be called a "heavy equipment operator" or in the case of union jobs, an "Operating engineer". In logging towns they are called "Catskinners"