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SWI-REDPOWER

1256 vs. 1456

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I am curious as to what is different on a 1256 vs. a 1456. I know they all a DT407 engine. Did the 14's come with bigger Lines, Injectors, Turbochargers, etc.? At the IH dealer all the numbers are the same for these pieces. Which would lead me to believe that they are identical with different pump settings. Is this true? What are the differences between the two?

Any help would be great!

Thanks! SWI

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1456 had a DC series 4 roller Roosamaster pump, 1256's had a DB series 2 roller pump.

1456's DT407 had 1 5/8" wristpins, 1256's 407 had 1 1/2" pins (1456 ones are highly sought after!)

1456's have a slightly longer hood than 1256's, due to radiator & cooling fan

1456's have a much larger rearend, using the bigger rear axles & brakes that you later saw on the 1466. 1256 rearend was about the same as a 1206. 1456's first introduced the 13/51 ring & pinion, 1256's still had the 12/49 ring & pinion.

1456's are suppossed to have a 3LD-279 Schwitzer turbo, 1256's a 3LD-229. Thanks to IH remans, they now call for a one-in-the-same reman turbo.

1456's had a muffler on them from factory, 1256's had a black straight pipe.

1456's were offered w/ the Excel diamond cab from factory, 1256's were offered w/ the Allen cab's only from factory. Excel diamond cabs could be ordered later to put on a 1256.

Those are the ones that come to mind right now.

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Thanks Guys!

Exactly what I wanted to know! Is there anything bigger than the 3LD 279 turbo that I could bolt right up to this stock 1256 exhaust manifold? I know some of the 3LMs and what not won't and I don't really want to fiddle with the modification, but if there were a bigger bolt on option that may be my route. (Maybe from a 4156?? just thinking out loud)

Also, Nebraska, are you looking to liquidate parts from your 1256 parts machine?

Again, Thanks for your help guys!

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There were a few 1456's around here back in the day, one of them went to Red Reaper's farm a few years back. The 1456's were rated more hp than the 1256 and had the bigger pump and different turbo but the 1256's around here would run right with them. Always wanted a nice 1456 though. Best thing about the 14's over the 12's was the bigger brakes and axles. Wasn't uncommon to hear of 1256 axles breaking under heavy loads with the hp some of them were turning.

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1256 vs. 1456, Whats Different?

1256... Original price: $10,700 (1969)

1456... Original price: $12,400 (1971)

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Good catch on the axle, JD, for some odd reason, the obvious escaped me! :wacko:

One other difference I thought of, between the 407 engines in 1456's & 1256's, is the exhaust valves. What's actually different about them, I don't know, I've never been able to pinpoint it. What I do know, is that there are two distinct p/n's, one for the exhaust valves used in 856's, 1256's, and 815 combines (pretty sure it was used in 361's in 806's & 1206's also), and the other for exhaust valves used in 1456's, 915's, and UDT407 power units. Both are still good numbers, I checked.

1456's, I believe, were the first Farmall tractor to offer 20.8-38 rear tires. 1256's big tire was 18.4-38's when new.

Let me know if there is something you're looking for, there isn't much left of the parts machine, most of the good stuff is gone. Send me a PM.

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isnt the 14 also intercooled

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isnt the 14 also intercooled

Nope, only 2 wd IH tractor that was intercooled to my knowledge was the 5488

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k thanks jd

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Dad bought his 1256 new in the fall of 69, shortly after that the 1456 came out. I recall seeing the 1456 photo on the cover of the 1970 buyer's guide. Pulling an on land hitch IH plow. Sure was an impressive looking tractor in that photo.

It was in the summer of 70 a few buddies and I were at a tractor pull somewhere near Valley Falls, Kansas. We stoppped by the IH dealership at Vallen Falls. That dealership had a brand new 1456 with the diamond IH cab on it, sitting on the lot. Two of my buddies that were riding along bled green. They immediatley began scrutinizing the new red tractors on the lot. I climbed up in that in that new 1456 cab, man that was a nice machine. Hated to think that dad's new 1256 was already outdated, maybe he needed to trade it for this one. I remember that day just like it was yesterday, hard to believe it was 39 years ago. :huh:

I would gladly farm again with 56 series IH power as my primary power source. The 56 series is my all time IH favorite line of tractors.

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I would gladly farm again with 56 series IH power as my primary power source. The 56 series is my all time IH favorite line of tractors.

56 series is my favorite of all, too. between the 656 hydros that we use every day to load and feed with, to the 826 hydro that is currently on the round baler, and the 1456 that pulls the planter and now the tandem rake hitch, we get to play with the 56s a lot. the 826 and 1456 would be the last 2 tractors i would part with.

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JD not to argue with you but a 1456 will walk a 1256! That 4 roller pump will rip!!! I have been on a 1456 with the front wheels 1-2ft off the ground and a nice flame out the stack plowing all night long! I have had two 1256 and been on several 1456's, both nice tractors.

1456's like to break there cam gear, only 407 with a down fall...

ny bill o the '56's were as good as it EVER got!

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Good catch on the axle, JD, for some odd reason, the obvious escaped me! :wacko:

One other difference I thought of, between the 407 engines in 1456's & 1256's, is the exhaust valves. What's actually different about them, I don't know, I've never been able to pinpoint it. What I do know, is that there are two distinct p/n's, one for the exhaust valves used in 856's, 1256's, and 815 combines (pretty sure it was used in 361's in 806's & 1206's also), and the other for exhaust valves used in 1456's, 915's, and UDT407 power units. Both are still good numbers, I checked.

1456's, I believe, were the first Farmall tractor to offer 20.8-38 rear tires. 1256's big tire was 18.4-38's when new.

Let me know if there is something you're looking for, there isn't much left of the parts machine, most of the good stuff is gone. Send me a PM.

Nebraska 1206, Kinda curious. Did the UDT407's have the larger wrist pins. Was it the motor they put in the 1456. I put a UDT407 in my 1256 a couple years ago. My original 407 had a broken crank. Was just curious what motor I have in it, one for a 1256 or 1456.

Later, Red56

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I would gladly farm again with 56 series IH power as my primary power source. The 56 series is my all time IH favorite line of tractors.

That makes 2 of us, JD. I'm very happy with my 656 and that's why I want to get an 856, then I will be able to do all of my work with those 2. I even want to make them look identical, right down to the narrow fronts, rock boxes, wheel weights, oval mufflers, & etc ;) I sure like to dream!

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Yes, the partsbooks for a UDT407 power unit show it having a 4 roller injection pump and 1 5/8" wrist pin connecting rods.

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JD not to argue with you but a 1456 will walk a 1256! That 4 roller pump will rip!!! I have been on a 1456 with the front wheels 1-2ft off the ground and a nice flame out the stack plowing all night long! I have had two 1256 and been on several 1456's, both nice tractors.

1456's like to break there cam gear, only 407 with a down fall...

ny bill o the '56's were as good as it EVER got!

Seems like most all the 1256's around here had the fuel turned on pretty strong. Dad's 1256 was the snappiest tractor I have ever ran.

What pump did the 1206's have from the factory, was it the same as the 1256 pump?

I too always thought the 56 series was about as good as it ever got. They were definately a step up from the 06's. The 66 series was not a step up, but a step sideways, IMO

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1206's also had a 2 roller Roosamaster, but the timing settings & advance mechanisms are different, as to the degrees the pump gets set at & how far it will advance.

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The 4 roller pump is laggier then the 2 roller for some reason, seems on a 1456 when you give it throttle it is going to roll a cloud of smoke and slowly light the turbo and go, where as the 2 roller will snap right to attention.

It sure is amazing how these 407's will run when you have the timing and fuel just right.

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now jere, shame on you, i love the 66 series. :lol:

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now jere, shame on you, i love the 66 series. :lol:

Sorry Jeff, no offense intended. I know you like the 66's and your 1466 is a fine looking and fine running specimen of IH muscle.

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How would 1066 compare to a 1456 power wise in the field? I never had the chance to run a 1456 in the field! Its gotta be dam close?!!

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How would 1066 compare to a 1456 power wise in the field? I never had the chance to run a 1456 in the field! Its gotta be dam close?!!

I'd be willing to bet a 1456 would eat a 1066 for breakfast and still be hungry (no offense Pat)

David

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How would 1066 compare to a 1456 power wise in the field? I never had the chance to run a 1456 in the field! Its gotta be dam close?!!

Depends on how well each tractor was "tuned". Either one could be made to easily outdo the other. With stock factory settings the 1456 should outpull the 1066 though. 1456 was rated 131 hp or so and the 1066 was 116 out of the box.

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Yes the early 10's were 116 out of the box, but after 73 they were around the 125 mark! Which I think is crap, most 10s came form the factory HOT! My 3400 hr BS dynos 138 hp, never touched the pump still has the wires on it!

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