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Allis dave 
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Joined: 10 May 2012
Location: Northern IN
Points: 3170
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 Topic: 7040 axle duals
Posted: 09 Jul 2026 at 10:16am |
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What options do I have on a 7040 with a short axle to run duals to straddle corn on 30" rows?
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8070nc
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Joined: 21 Mar 2019
Location: North Carolina
Points: 898
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Posted: 09 Jul 2026 at 10:51am |
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Mexican hat with spin out
rim wound probaly do it if theres enough room on the axle to mount it. If there is enough room on the axle a 10 bolt hub with a spacer between it and the wheel
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1984 80780
1957 D14
DES 300 with 25000 engine
616 tractor
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injpumpEd
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Joined: 13 Sep 2009
Location: Walnut IL
Points: 5273
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Posted: 09 Jul 2026 at 1:33pm |
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Flower pot hubs may be easier to find, then you can use the more readily available 9 bolt pressed steel dual rims, many have a deep enough offset to get out to the 120".
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210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers!
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Allis dave
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Joined: 10 May 2012
Location: Northern IN
Points: 3170
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Posted: 09 Jul 2026 at 1:46pm |
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Thanks guys, I dind't think the axles would be long enough to just but on a hub. There's tractor for same that I was mildly thinking about but I require it to run down 30" rows with duals
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jiminnd
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Joined: 16 Sep 2009
Location: Rutland ND
Points: 2375
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Posted: 09 Jul 2026 at 1:58pm |
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I had hub duals on 7030 with short axle. Not set for 30 inch rows but enough room for the hub.
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1945 C, 1949 WF and WD, 1981 185, 1982 8030, unknown D14(nonrunner)
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Leon B MO
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Joined: 12 Sep 2009
Location: Old Monroe, Mo
Points: 2259
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Posted: 09 Jul 2026 at 3:35pm |
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I have an 8050 with short axles with 10 bolt DMI hubs on it. About 3/4 of an inch of the hub sticks out past the axle. I've had them on there for at least 10 years and have not had a bit of trouble. I also have and 8070 short axle with 9 bolt hubs, three u-bolts and the hub is also about three quarters of an inch past the end of the axle. Again those duals have been on that tractor 10 years or better. DMI also makes 4-in or 8 in spacers for 10 bolt to get out to a 30 inch row spacing. On the 8050 with the 10 bolt DMI hubs if I had a 4-in spacer it would be perfect for 30-in rows.
Leon B Mo
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Uncle always said "Fill the back of the shovel and the front will take care of itself".
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8070nc
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Joined: 21 Mar 2019
Location: North Carolina
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Posted: 09 Jul 2026 at 5:00pm |
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Unverferth makes the hubs and spacers. I think wold makes them also
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1984 80780
1957 D14
DES 300 with 25000 engine
616 tractor
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SteveM C/IL
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Joined: 12 Sep 2009
Location: Shelbyville IL
Points: 9196
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Posted: 13 Jul 2026 at 10:34pm |
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My 8030 short axle has 10 bolt hub duals and spaced nice for 30in rows. Axle is recessed in hub about 3/4in. Suppose it depends on how much dish is in dual wheel. Bought it this way.
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Tbone95
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Joined: 31 Aug 2012
Location: Michigan
Points: 12495
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Posted: 14 Jul 2026 at 1:15pm |
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Guess not what you’re looking for and don’t know your location…. I have T-Rail clamp on duals that are for 30 inch rows. They are for sale.
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SteveM C/IL
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Joined: 12 Sep 2009
Location: Shelbyville IL
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Posted: 14 Jul 2026 at 1:23pm |
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Clamp on doesn't play well with 2ft tall corn....
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Tbone95
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Location: Michigan
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Posted: 14 Jul 2026 at 1:33pm |
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K. Like I said, not what you were looking for.
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