It was a longer process when the development of a new tractor was carried out. It's easier now, with 3D software and computerized machines. However, it was an honor for those who built in the past to make more quality than quantity.
I've always liked the D21. I remember as a kid, probly pre teen, when this series was introduced. We had a 190XT on our farm, in fact 2 of them; one with a cab the other open station. They were nice to operate. The D21 was head and shoulders over the 190XT in terms of sheer size and horsepower. I always thought it was very handsome and wished I coulda owned one.
We had neighbor who ran Allis Chalmers equipment. MR. J.N. SMITH, our family was John Deere and IHC mostly due to dealer location nearest AC dealers were respectively 60 and 80 mile round trips John Deere and IHC dealers were 10 and 20 mile round trips. We had two John Deere and two IHC DEALERS in each of our two neighboring towns ...
I collect old AC ads....one is introducing the D21 with a full page picture of the man demoing the plow in this video...titled..."big power for big farming".
4020 was a heck of a tractor too, probably one of the best JD ever produced. Interesting though that the 21 could be bought new for about $100 more than the 4020. I think PTO power was 30 hp more on the D21.
I agree. Imagine if that were around today, it would be worth big money. I did some searching online and found this. theweekendhistorian.com/2013/09/01/memories-from-the-allis-chalmers-proving-grounds/
An excellent film by Allis-Chalmers on the D-21. In what year did A-C introduce the D-21 and how many years was it produced? Thanks. - Dean from Minnesota
The D-21 was made from 1963-1969. In 1965 the horsepower was increased from 103 to 127 with the added turbo. The 1965-1969 models are known has the Series II. Allis built 1129 of the original version and 2409 of the series II For a total of 3538 units.
@@jimsteele7108 Only if cranked beyond the factory setting of 170 hp. Otherwise it was known as a heavy pig, at least in my area. Not to mention the poor reliability of the 531 engine. Don't work them as hard as the old ads showed or you'll be dropping a Detroit repower in it.
Early D21's had weak rear ends. The 210 and 220 fixed all that was wrong with the D21 and were bullet proff tractors unlike that piece of crap Deere put out called the 5010 then 5020 then 6030. All were dogs and if turned up in horse power then they would suffer drivetrain problems. They were a poor tractor that even Deere owners admitted to back in the day when these were being used in the field. The 4020 was a fuel drink dog too but mostly reliable though my friends with a 4020 sometimes had cooling problems on hot days pulling heavy loads. The 4020 beat the heck out of any 2 cylinder.
I think probly the JD 5010 was a close match to the D21 at around 117 hp. The 5020 came out with 133 hp. In those days there was nothing bigger than those two tractors.
The 5010 and 5020 were too heavy and sluggish. A D21 would run circles around them for that very reason. Only a turbo wakes up a 5010 or 5020 but then other problems arose like cooling and some drive line problems.
The 5010 was a mighty tractor however it did not have a cross flow head like the D21. Seems odd that those tractors were not designed with a modern cross flow system.
Used a D21 once they were. A fair tractor I guess. Problem the horsepower was over sized for the rear end. Wouldn't stand up to the power almost every model had problems on drive system
I've been around A.C. all my life and no one ever said the D-21 had rear end issues. The 190 sure did but A.C. fixed that. The D series was a very good line of tractors. The biggest issue was jumping out of gear which was caused by the operators grinding the gears.
@@awatchmanonawall6188 Early ones had smaller bull gears and pinions. Serial number 3596 and up were beefed up. Still not as bad a problem as the first year production of the 190XT.
