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| Dave,
I generally figure about 1 hp for 36 us gallons on level ground (like the midwest US) if there are any hills, I back down to 1 hp per 30 us gallons. I would reccomend a maximum of 3600 us gallons on a 120 hp tractor with the hills in your situation. I always reccomend steerable tanks to reduce wear on tires and the undercarriage.
As far as brakes-this should be an automatic yes. A couple of the engineering societies reccomend that the trailer can weigh no more that 1.5 times the towing vehicle. As a rule of thumb a manure tank weighs about 11 lbs/ us gallon when loaded (with non-sand laden manure). A 3600 us gallon tank would be 40,000 lbs-so I would definately reccomend brakes.
You may want to look at a larger tractor and tank-you'll spent a lot of time hauling manure otherwise.
Andy
P.S. I am a big fan of Houle's-I have learned a lot about manure working with them. | |
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Sizing a Manure Tanker
