Horsegoer, since I know your question comes from an estimating perspective, here are a couple of things...
If at all possible for the estimate, get a price from your local concrete vault company that includes delivery and set in place. Then your job is done! If not, put is $700 to cover equipment cost and live with it plus or minus. I say $700 because I don't believe you will need to lift 4000 pounds. With that kind of weight, I am expecting either 3 or 4 pieces that total that weight A base, rim and cover assembly, or indivdual 2 piece cover. You can rig that in place with a mini excavator, backhoe, or possibly a little winch on the back of a trailer.
Baiscally though, while it is good to be curious, this is one of those places in an estimate that you just throw some money at and let the field guys find a way to beat it.