Topic: Re: Tow Bar for Grain Truck|
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Like I said, 40-ton tractor trailers haul a$$ down the road at 65MPH every day. The tractors weigh around 8-9 tons empty, so the load is around 32 tons, or 4 times the weight of the truck.
A 6500lb grain truck with a 5000lb pickup at 35MPH is very doable.
You need a rigid A-frame tow bar to keep the truck following behind you.
A 2" square, 1/4" wall mild steel tube is enough to tow a 10,000lb trailer with a 1250lb tongue weight. Two of those between the trucks, along with at least two safety chains as backup, will be plenty.
Do the brakes work? I'm on the fence about recommending that someone ride in the towed truck to operate the brakes, just to help you in stopping and in case of a breakaway.
|willie in mn
Re: Tow Bar for Grain Truck in reply to mkirsch, 08-13-2013 09:54:00
|A 4000 series Great Mountain Climber (GMC) with a 16 ft steel box more than likely also has a hoist under the box, pushing the weight to close to 9000#. Add no brakes or steering & you have the tail wagging the dog. |
Bumper pull RVs typically don"t weigh more than 6000-6500#, they all are required to have brakes, & carry 15% of that weight on the hitch. Bigger RVs with 5th wheel hitch might go up to 8000, but carry 40% or so on the hitch.
Typical big rigs gross up to 80000#, but carry 12000# on the steering, 34000# on drive tandems, 34000# on the trailer tandems. They also have brakes on all wheels. Add it up, 46000# on the tractor & 34000# on the trailer.
You say 35 mph is doable. Put a decimal point in there, make it 3.5 ( three & a half) mph might be a better figure.
End of rant.
diesel pilot-retired with over 40 years experience
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