In our case the D21 Series II would outpull the 1206. My brother pulled his 21 against me on grandpa's 1206 and handed it to me more than once. Now the 1256 with it's Schweitzer turbo and 407 cu inches vs the Series II 21 that was close. For longevity the IH would beat the Allis. The A-C had weak connecting rod design and quite a few engine blocks were windowed. The bull gears were also known to fail on the D21's. IH spent a ton and a mean a ton of hours testing the 806/1206's before they were released. They did not want a repeat of the 560's failures and history will show of some well cared 06's and 56's have accumulated incrediable number of hours before needing repair. I have a neighbor that has a 1026 hydro with a DT407 engine going in for it's first overhaul with 34,000 hours. Wow!
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Today's Featured Article - A Cautionary Tale - by Ian Minshull. In the early 1950s my father bought an Allis Chalmers B and I used it for all the row crop work with the mangolds and potatoes, rolling and the haymaking on our farm. The farm and the Allis were sold and I have spent a lifetime working on farms throughout the country. I promised myself that one day I would own an Allis. That time event
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