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Tandem tractors

M

mkirsch

Well-known Member
Does anybody have any information on the design of the hinge that was used to join two tractors together to make one large 4x4?

Specifically, was there any provision made for the two tractors to "twist" independently so if one wheel dropped in a hole, all four wheels would stay on the ground?
 
the one i saw years ago did have.way it worked was sort of like a reciever hitch but instead of square it was round and it was pinned on the end so it would twist.Steering as i recall was two hydraulic cyls.I really dont know why you couldnt just build the hitch so it fit exactly where the rear front axle pivoted,(on some wide front tractors) but it may not be sturdy enough there to pull from.Probably would be stronger to pull from a frame, thats how the one i saw was setup anyway.Thats the only one i ever actually saw up close and it was at a farm show type deal.
 
Here are a couple snaps of the steering on Scott's
DD John Deere.
It pivots side to side on the original front axle
pivot beefed up and swivels left to right at the
hitch point.
a57351.jpg

a57352.jpg

a57352.jpg
 
Look on You-tube title' Doe triple D' for pictures of commercially
produced tandem tractor/s
Sam
 
Just come back from a plow day here in the UK. We had 8 working Doe Triple D tractors plous many others of all makes. I got the chance to drive a Marshall single cylinder tractor on tracks pulling a Ransomes Hexatrac 6 bottom plow. MJ
 
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