This Loco RFD workhorse held a 500 gallon tank, that amount of water and a gasoline powered pump in the rear. Water weighs 8.345 lbs. per gallon, so that is 4172.5 lbs. Add another 1000 or so for the tank and 200 for the pump and this thing carried a lot. I noticed when the tank was removed that it sits several inches higher in the rear than it younger brother.