I have a 2002 B7500. It does not have a Front end loader.
I am looking at the Fimco 60 gallon 3 pt sprayer.
https://www.tractorsupply.com/tsc/product/fimco-60-gallon-3-point-hitch-mounted-sprayer-with-7-boomless-boom-hypro-roller-pump-and-coupler-deluxe-handgun
Loaded with water it will weigh...