I have a D6C tractor manual and it has specs for just the tractor without the blade and I assume without the hydraulic tank and hyd mechanism and it says 30,600 so im thinking the complete dozer is more like 35 or 36,000.
Anybody with better info or a weight slip from the truck scales feel free to jump in.
My 10K parts manual lists bare tractor weight as 23,700 lbs.
My Cat performance manual No 10 lists D6C 74A as 23,000 lbs: D6C 76A as 23,500 lbs and D6C 10K as 30,600 lbs.