Thanks for all the info. These trucks were defiantly under rated because you never know what some 18 year old will do to a free truck that isn't his, but following these rating AND using a little discretion will make these last a long time. I'm thinking that if it is rated to safely carry 10,000 on road at 55mph, I think it can safely carry that off road with a little discretion.
http://www.roscommonequipmentcenter.com/ claims a capacity of 900 gallons of water and a tank weight of "3,350 lbs. (without water or accessories)". That's about 11,000 lbs. We use all poly tanks, which are very light and the pump is an 18hp gas unit. Even with powered reels and 300' hose it's still not more then a few hundred pounds total. Since our skid mounted sprayer already has a 600 gallon tank, if I added a second 600 gallon unit that would be 10,020lbs (but you never quite fill them all the way). So the total weight would be almost exactly what roscommon recommends.
Also, I forgot to mention that all this spraying will be between 6000 and 10,000 ft above sea level. Sould make for some slow driving.
http://www.roscommonequipmentcenter.com/ claims a capacity of 900 gallons of water and a tank weight of "3,350 lbs. (without water or accessories)". That's about 11,000 lbs. We use all poly tanks, which are very light and the pump is an 18hp gas unit. Even with powered reels and 300' hose it's still not more then a few hundred pounds total. Since our skid mounted sprayer already has a 600 gallon tank, if I added a second 600 gallon unit that would be 10,020lbs (but you never quite fill them all the way). So the total weight would be almost exactly what roscommon recommends.
Also, I forgot to mention that all this spraying will be between 6000 and 10,000 ft above sea level. Sould make for some slow driving.