d 21question

phillip d · Sep 28, 2009

Saw one at a local club get together yesterday and was wondering if A C or anyone else at the time made anything bigger than them?

Anonymous-0 · Sep 28, 2009

Phill, if you are refering to a HD21 AC of Fiat Allis, yes they built a 31 and a monsterous 41.
Later Bob

phillip d · Sep 28, 2009

I can imagine how they must have seemed like mamouth beasts of machines back in the mid 60's seeing somthing like that in an area when 50 hp was plenty big on most farms.Thanks,pd

Sid · Sep 28, 2009

At that time it was the Biggest rubber tired farm tractor AC made. I do not know how big the crawler tractors used in the Pacific Northwest where at that time.

John Harmon · Sep 29, 2009

Just for shooting the bulls sake I spent some time digging up these facts. AC D 21 production start 1962 with 116 drawbar HP. tested==Massey Harris 55 start 1946 with 57.6 drawbar HP tested==Massey Ferguson 1130 start 1964 with 107 drawbar HP tested==MM G1000 start 1965 with 100.9 drawbar HP tested==Oliver 1950 start 1964 with 98 drawbar HP tested==IHC 660 start 1958 78-80 drawbar HP tested== and the biggie,John Deere 8010 150 drawbar HP tested,the 8010 and the later 8020 both were rated 150 drawbar HP.I'm not sure what engines or what fuel was used in these tests.It is obvious that the Massey 55 had a 4 cyl. gas engine and the Deere had a 6 cylinder diesel but from there ??

Texas Denny · Sep 29, 2009

Based on Wendell"s records of the Nebraska Tractor Tests, the D-21 (118 drawbar) was never the biggest wheel tractor. John Deere introduced the 5010 (121 drawbar) the year before. However, the D-21 Series II (128 drawbar) held the record for biggest until the Allis 220 (136 drawbar) was introduced. Both held the record for short times.

cadet trooper · Oct 1, 2009

According to tractor data.com all but one JD 8010s were converted to 8020s due to transmission problems they were powered by Dtroit diesel 6-71 425ci at 215hp flywheel. I saw either an 8010 or 20 pulling an 8 bottom fully mounted plow doing plots at a Wilmington Ohio Farm-O-Rama as a freshman in high school in 1961 most awsesome thing I ever saw that cottonpicker could back up 8mph. The following year I saw an AC D21 pulling a 6 bottom plow at the new Farm Science Review in Columbus Ohio another most awesome thing I"ve ever seen along with a JD5010 doing the same thing but maybe not quite as fast :-> factory mechanics usually have Carte Blanc on the fuel screw adjustments let"s just say a lot of black smoke was involved. The comment the commentator said was this is as big as it gets! Yah, right! My brother and I looked at each other and just smiled. Sidenote if you see an actual 8010JD it is the only one left. We got distracted by either Fox or Gehl when they brought in a new two row self propelled forage harvester. WOW! Another awesome thing!

d 21question

phillip d

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Anonymous-0

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phillip d

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John Harmon

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Texas Denny

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