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Largest Tractor Ever Built ?

U

Uncle Ernie

Member
Who built the largest TWO wheel drive tractor? This could mean several things, Largest in Weight, Largest Horsepower or Largest meaning highest hp to weight ratio. Had a good discussion of this at the tractor show last weekend. Wanted to see what the consensus was here too.
 
You can get a new Deere 8530 in two wheel drive. They are 275HP. Never seen one as most have MFWD. As far as older tractors I know Stieger experimented with 2WD but don't know the HP they built.
 
If you say before lets say 1975. I would guess it would be the 1566 IH. 161 hp tested at the Neb test in 1975.
 
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And according to a JD engineer who worked there at the time, very few production 6030's left the factory at less than 200 hp...
 
AC 7080 in 1974 was at 180 hp. Many were over 200 from the factory. I knew of one still around 10 years ago at about 250 hp but I doubt it has survived at that and that was turned up by the customer when new.
 
The largest production two wheel drive tractor in the world in 1978 through the early 1980's was the Massey Ferguson 2805. Perkins 640 turbo under the hood and rated at 194 hp.
 
The Big Bud 747 is a 4WD.........I was thinking the same thing myself but then I re-read the question.........Big machine isn't it? It's located in Montana I believe, not far from where the factory used to be.............
 
I vote for the big lizzie. Might not have the biggest hp/weight ratio, but otherwise I think it still takes honors.
419251-Big-Lizzie-0.jpg
 
Don't think it was ever put into production and appparently there were only 2 prototypes built, but at 1,111 HP, it had to be the 3rd series of the Essex Tri-Directional.
 
do we get to could tractor puller tractors??? there are some silly horsepower numbers out there... i'm thinking twin/triple aero engined machines, merlin/packard/allison powered at 2000hp each give or take... pretty awesome power to weight ratios.
 
I don't know for sure but I bet Uncle Sam paid for it to be built with your tax dollars. At Area 51 no doubt, so we will never know.

Can we count the track tractors? Because those trenchless tile plows have good weight and plenty of horsepower.
 
I think there was an Australian two wheel drive that was cranking over 300hp with massive rear tires I'm hoping our buddies over there will jump in.
 
The john deere 4960 was avaliable in two wheel drive form and left the factory at 200HP. Today I think only the 8130 is avaliable in two wheel drive form from the factory and that is around 180 HP. Still think a well broke in john deere 6030 is the largest. But who knows, just a john deere guys opinion.
 
Want to consider the 110hp Case steamer? How about the 30-60 Aultman-Taylor? The 30-60 Twin Cities? Agreeing with the Austrailian fella, the sheer weight of these machines allowed them great traction, want to hook any of those 180-350hp machines to a 60 bottom plow ??
 
I see three problems with your statement! One, the Essex is not 2wd. In fact I am not sure what it really is aside from unlimited traction. Two, it definately is more than 1,111 hp! Pretty sure it was unlimited. Which when you combine the two, unlimited traction and unlimited horsepower then throw in the fact that it had an error and the "wheels" were going in opposite ways you see why it pulled itself apart and created a blackhole... if memory serves me correctly. Think Elvis was driving it too. Third, we shouldn't even be talkin about it! I have to go put on my tinfoil covered armadillo helmet and lather up with veggie oil to reflect any rays "they" are aiming at me right now!
 
Case 1570 was supposed to be 180 from the factory as well as the 2590... seems as many were over that. The 2594 should have been 185 but same goes there... usually 200+ from what I hear. Easy on fuel too! The Allis 7080's should have been 180.
 
You may be thinking of the Australian Upton tractors. There were various models made in the 60's and 70's. The largest was built from 1978 into the early 80's and was 350 engine horse power. The company also designed 4WD tractors up to 600hp but non were ever built. The company is still around but manufactures irrigation equipment. I'll see if I can hunt up some pics.
 
garytomaszewski: "Want to consider the 110hp Case steamer? How about the 30-60 Aultman-Taylor? The 30-60 Twin Cities?"

I do not believe there ever was a 30-60 Twin City. There was a 40-65 and a 60-90 though, which is an absolute behemoth. If you want to count steamers, there is the 40 Reeves and 36-120 Rumely and the infamous Case 150, of which only a boiler remains. Also there was an experimental Maytag rated at 80-150 that reportedly had a 19" bore and 32" stroke. Crankshaft diameter of 8' and flywheel diameter of 12'. My bet would be that it was the largest wheeled tractor ever built. http://rumelypull.tripod.com/Images/Rollag/Twin60.jpg
 
Only saw the TC in the weeds it was huge, dad said it was the
same as our A-T (50+yrs ago). Would the Reeves 40 be the one
that was called the Canadian Special ? I've never heard of the
36-120 Rumely,what era would it be and where would it be used
(Great Plains maybe)? Heard so much about the 150 Case; Was it
ever actual complete or used?
 
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