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Discussion Forum

Re: AC D21

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02-22-1999 15:18:27

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The orginal D21 was naturally aspirated. It had about 101 pto hp. The Series II D21 had the turbo, w/ about 126 pto hp. I sure somebody will correct the hp rating if I'm wrong.

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10-31-2002 06:19:25

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 Re: Re: AC D21 in reply to mm, 02-22-1999 15:18:27  
Most well-maintained D-21 Series II will pull MORE
than the factory-rated PTO Horsepower. Personally, I've never seen a GOOD Series II test BELOW 132 PTO horsepower on my CALIBRATED Dyno. Increases to the D/fuel flow will greatly increase PTO hosepower on the D-21, but the REST OF the Driveline can't use that extra HP; unless the D-21
driveline has been "Modified". One of my (2) Series II D-21 pulls 185 PTO @3/4 throttle; I pull
10-18 inch plows (and a Culti-mulcher) @ 8-9 inches deep in HEAVY SOD ground. A STOCK D-21, in GOOD Condition, will pull 7-16s anywhere, anytime. They were DESIGNED from the AC factory to do this and they will. As mentioned elsewhere in this forum, Allis-Chalmers put way too much HP capability in the 3500 series of D-21 engines; they realized their mistake after having to "eat" all those clutch replacements under factury warranty.

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03-16-1999 21:59:09

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 Re: Re: AC D21 in reply to mm, 02-22-1999 15:18:27  

I am looking for a D 21 to restore like to find one with straight sheat metal and original engine preferable without cab if you know of one for sale you can e-mail me at webner@ncn.net Also looking for an original 220 front wheel assist possible finders fee if one is located.

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Jerry M.

03-18-1999 15:29:01

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 Re: Re: Re: AC D21 in reply to ALEX, 03-16-1999 21:59:09  
There is an AC D-21 with a Dunham front end loader being sold at auction on Monday, March 29, 1999 at 11:00 AM. Also a Massey Ferguson 1130 diesel (120 HP). Also an AC 3-bottom plow plus other non AC farm equipment. It is in Exton, PA (about 30 mi. west of Philadelphia, PA on business Rt. 30).

The auctioneer is Action Auction (Glenn S. Frame). Phone 610-458-7624.

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Today's Featured Article - Tractors and Winter - by Staff. Unfortunately, tractors and winter don't mix well. It seems that I can start out with my tractors in great running condition but sometime during the long cold dark winter they quickly revert to the lawn-art category. The lack of running, cold weather, and admitted neglect all take their toll on a machine. If you are lucky enough to not need your tractors during the winter months you can perform a few simple maintenance items to winterize and come spring have them going by reversing the process. If you need your tractor in ready-to-run condition (like that ... [Read Article]


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