AC 7580
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=42952
Printed Date: 09 Jul 2025 at 8:13am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: AC 7580
Posted By: JAMESlunde
Subject: AC 7580
Date Posted: 29 Dec 2011 at 7:45pm
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CAN, ANY BODY TELL ME WHAT OTHER ENGINS,AND MORE HP. I CAN PUT IN A 7580 ,I WOULD LIKE TO GET UP TO 250 .300 HP
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Replies:
Posted By: Unit3
Date Posted: 29 Dec 2011 at 8:05pm
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I have seen a Deutz air cooled in one. You can see one on You Tube, but its a loud machine. I do have to ask about the 670HI that is in your 7580. Has it gone bad?
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Posted By: Calvin Schmidt
Date Posted: 29 Dec 2011 at 8:08pm
I know of one that has the 8.3 Cummins conversion. The owner is very pleased.
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Nothing is impossible if it is properly financed
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Posted By: CAL(KS)
Date Posted: 29 Dec 2011 at 8:18pm
There is a cummins engine, i believe it is a 505? that is an option to swap in, we were told about by our AGCO dealer, dad almost went with one be we decided to reman the AC engine. personally i think a 516 AC engine would be neat. i believe Bob @ reliance works was working on a swap like this about a year ago or so when i spoke with him. Sorry, I think its Bob, its been a long time since i spoke with him and im not at home so i dont have my notes. Pm me if you wold like a phone # I have the info but im not home.
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Me -C,U,UC,WC,WD45,190XT,TL-12,145T,HD6G,HD16,HD20
Dad- WD, D17D, D19D, RT100A, 7020, 7080,7580, 2-8550's, 2-S77, HD15
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Posted By: Orange Blood
Date Posted: 29 Dec 2011 at 8:32pm
Just a thought, weren't the 7580s kinda light in the drop boxes, and the finals, and didn't handle the stock HP very well as it was??? 250 to 300HP might be asking for many more repair bills down the road?
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Still in use:
HD7 WC C CA WD 2-WD45 WD45LP WD45D D14 3-D17 D17LP 2-D19D D19LP 190XTD 190XTLP 720 D21 220 7020 7030 7040 7045 3-7060
Projects: 3-U UC 2-G 2-B 2-C CA 7-WC RC WDLP WF D14 D21 210 7045 N7
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Posted By: Luke R.
Date Posted: 29 Dec 2011 at 8:38pm
There is a damn cool video of a 7580 with a screamin detroit on youtube. Sob really screams up and down the road. I dont know how to post it on here
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4-7030's,170G,220FWA,3-220's,210,D21II,D21I industrial,2-200's,3-190's,175D,2-D19D's,D19G,WD45,WD,CA,2-UCont.,5015FWA,917,B110,Gleaner F
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Posted By: Orange Blood
Date Posted: 29 Dec 2011 at 8:40pm
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Here you go Luke.
http://www.youtube.com/watch?v=xWwF5o-sVgs - http://www.youtube.com/watch?v=xWwF5o-sVgs
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Still in use:
HD7 WC C CA WD 2-WD45 WD45LP WD45D D14 3-D17 D17LP 2-D19D D19LP 190XTD 190XTLP 720 D21 220 7020 7030 7040 7045 3-7060
Projects: 3-U UC 2-G 2-B 2-C CA 7-WC RC WDLP WF D14 D21 210 7045 N7
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Posted By: Luke R.
Date Posted: 29 Dec 2011 at 8:52pm
Thanks. Pretty cool huh
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4-7030's,170G,220FWA,3-220's,210,D21II,D21I industrial,2-200's,3-190's,175D,2-D19D's,D19G,WD45,WD,CA,2-UCont.,5015FWA,917,B110,Gleaner F
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Posted By: HagerAC
Date Posted: 29 Dec 2011 at 9:29pm
Dad put a Deutz in one many years ago.
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30+ A-Cs ranging from a 1928 20-35, to a 1984 8070FWA, Gleaner R52
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Posted By: DrAllis
Date Posted: 29 Dec 2011 at 9:42pm
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7580's were rated at 222 eng flywheel HP. That being said, I have seen several transmission failures at that 222 HP rating, so it would be a very dumb thing (in my opinion) to transplant an engine that has even more HP and torque into a chassis that I know is already prone to failure at 222 HP. Do what you want.... it's your money.
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Posted By: redline
Date Posted: 29 Dec 2011 at 10:08pm
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My neighbors have one with an 8.3 cummins in it. That combined with the Arkansas driveshaft kit made a tractor out of it. They pull a 5 shank M&W earthmaster with it and have used it on a good sized JD soil finisher in the spring and seem to get along with it fine. That said, you can either keep spending money on the 3750 with weak rods and rod bolts, or you can rebuild a drop box from time to time. You pays your money and you makes your choices. I think I would put my money toward a Case-IH 9130 or something like it. I had a 9130 that was turned up to the range you want, and it was one heck of a tractor. I know how much trouble I will get into for suggesting that, but the 7580 just wasn't made for all day-all out hard pulls. We row cropped with one on a 12 row buffalo ridge till cultivator and burned holes in pistons with that. You would have better luck and less money tied up in a good used 4W305. Most, if not all of them had PTO and 3 pt. so it would make a great grain cart tractor I would think, and would be built for hard primary tillage.
EDIT-after thinking about this awhile, I think I came across a little too gruff on my reply. The 7580 would fit a lot of situations, I just don't think you would be happy pushing the old girl that hard. It was designed to pull the same implements as 160-180 horsepower tractors, but not have the traction limitations. Problem was, it looked a lot like the big Steigers and Versatiles of the day. I think the IH 2+2 guys had to learn the limitations in a similar manner.
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If it weren't for the last minute, I wouldn't get anything done!
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