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Discussion Forum

Re: D21

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Phil Munson

04-12-2002 07:34:32

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The D-21 has the AC 3400 non turbo and the series II has the AC 3500 turbo engine. If you want to seriously farm with it, consider the AC 220 as a substitute. The D-21 we had would blow the doors right off the cab of a souped up 200 HP IHC 1456, and our D-21 barely smoked. However, the D-21 was very weak in the final drives. If Pa or I ran it there was no problem. If we allowed one of the boys to run it, we could figure on working on the finals. The AC 220, and 210 (same chassis, a little less fuel) were 4 inches longer than the D-21 from having a heavier final built into the tractor. The D-21 was a sweet tractor, but had way too much fire in front of the flywheel.

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10-30-2002 12:18:59

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 Re: Re: D21 in reply to Phil Munson, 04-12-2002 07:34:32  
Phil, you are correct; but new technology has solved the problems that you remember on your
(old) D-21. One of my (2) D-21 Series II pulls 185 PTO Horsepower @ 3/4 throttle!!. I pull 10-18s plows AND a culti-mulcher, in heavy SOD ground; I've seen grown men who thought they had seen EVERY strong tractor around, go home crying
(especially the JD owners). I specialize in rebuilding piston turbocharged engines to better than original factory specs and then I run them on my CALIBRATED PTO dynomometer. I solved the lightweight D-21 finals problem by rebuilding and RETEMPERING the gears to my specs; I have one D-21
owner in the Salem (Oregon) area who pulls 205 PTO horsepower out of his D-21 SII; I rebuilt the engine for him 6 YEARS AGO; he's NEVER been beaten
in a formal tractor pull!!!

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