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1256 vs. 1456


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#1 SWI-REDPOWER

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Posted 08 July 2009 - 03:19 PM

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
"Hold my beer while I smoke this Deere."

Farmall Super C, International 806 FWA, Farmall 806, Farmall 1206, IH 1256, IH 966 (2), IH 1066, IH 1466, IH 686, IH 1486, IH 1586, IH 3688, IH 5488, CIH 3294, CIH 7210, CIH 8930.

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#2 Nebraska1206

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Posted 08 July 2009 - 03:32 PM

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.
'66 1206 puller, '67 1206, '67 1256, whats left of another '67 1256 (parts), & 682 Cub Cadet are mine; Dad has a 1066 B.S., 826D, 756D, two 706's w/ D310's, '53 Super M (stage 2), 1640 combine, and a 1650 Cub Cadet. All located in Northeast Nebraska.

"Think Outside The Bun!" - Taco Bell

"Oh, you hate your job, oh my god, why didn't you say so? Ya know, there's a support group for that, it's called Everybody! They meet at the bar!" Drew Carey

TEAM 407: "We don't care about your intake manifold part number!"

Link to my Facebook album of the 1206 puller project

#3 JD Humm

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Posted 08 July 2009 - 05:17 PM

1456 wide fronts were heavier also.

#4 SWI-REDPOWER

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Posted 08 July 2009 - 05:28 PM

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!
"Hold my beer while I smoke this Deere."

Farmall Super C, International 806 FWA, Farmall 806, Farmall 1206, IH 1256, IH 966 (2), IH 1066, IH 1466, IH 686, IH 1486, IH 1586, IH 3688, IH 5488, CIH 3294, CIH 7210, CIH 8930.

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#5 JD Humm

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Posted 08 July 2009 - 05:31 PM

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.

#6 retento

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Posted 08 July 2009 - 05:42 PM

1256 vs. 1456, Whats Different?

1256... Original price: $10,700 (1969)
1456... Original price: $12,400 (1971)

#7 Nebraska1206

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Posted 08 July 2009 - 07:13 PM

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.
'66 1206 puller, '67 1206, '67 1256, whats left of another '67 1256 (parts), & 682 Cub Cadet are mine; Dad has a 1066 B.S., 826D, 756D, two 706's w/ D310's, '53 Super M (stage 2), 1640 combine, and a 1650 Cub Cadet. All located in Northeast Nebraska.

"Think Outside The Bun!" - Taco Bell

"Oh, you hate your job, oh my god, why didn't you say so? Ya know, there's a support group for that, it's called Everybody! They meet at the bar!" Drew Carey

TEAM 407: "We don't care about your intake manifold part number!"

Link to my Facebook album of the 1206 puller project

#8 turbo10

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Posted 08 July 2009 - 07:24 PM

isnt the 14 also intercooled

#9 JD Humm

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Posted 08 July 2009 - 07:28 PM

isnt the 14 also intercooled



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

#10 turbo10

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Posted 08 July 2009 - 07:29 PM

k thanks jd



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