Tell me about 7580’s
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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=175066
Printed Date: 04 May 2025 at 12:25pm
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Topic: Tell me about 7580’s
Posted By: timmiso
Subject: Tell me about 7580’s
Date Posted: 10 Oct 2020 at 7:30pm
| In need of a heavier tractor to do some ripping and put in some drain tile. My 7060 handles the ripper OK, but has a fair amount of wheel slippage. I built a small tile plow that I want to run some shallower 4 inch lines to help with drainage - I think the 7580 has a slow enough low gear to put the tile in — I’m aware of the issues the 426 has — hows the rest of the driveline? |
Replies:
Posted By: FREEDGUY
Date Posted: 10 Oct 2020 at 7:54pm
Other than an AWEWSOME looking machine, I'm going to bet that the "better informed" are going to say "pass'" on that horse  . JMO  .
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Posted By: victoryallis
Date Posted: 10 Oct 2020 at 8:57pm
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I’ve had one 6-8 years and still not sure of my opinion on them. Mine has had some drivetrain issues but then again a 300 + Cummins on the front I’m sure doesn’t help. Bullet proof no- kick butt grain cart and discing tractor yes. I’ve drug a 850 bushel grain cart places I never should have tried. All that said I had someone offer me good cash money for mine and it’s still around. ------------- 8030 and 8050MFWD, 7580, 3 6080's, 160, 7060, 175, heirloom D17, Deere 8760 |
Posted By: bigal121892
Date Posted: 10 Oct 2020 at 9:46pm
| We had one for a while. It is best to treat them as you would a 7060/80, meaning don't pull anything bigger than what those tractors would pull. If you want one to have, that's one thing, but if you are going to put it to work, personally I would look for a Steiger of the same vintage. |
Posted By: victoryallis
Date Posted: 11 Oct 2020 at 6:43am
I have a 7580 and had a FW 30 Ford basically a rebadged Steiger Panther. The Steiger was stout but by far was not trouble free. If I had a choice between using the Ford or the 7580 I’d use the 7580. When the Deere came the Ford left. ------------- 8030 and 8050MFWD, 7580, 3 6080's, 160, 7060, 175, heirloom D17, Deere 8760 |
bigal121892 wrote:Posted By: AC7060IL
Date Posted: 11 Oct 2020 at 10:45am
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I agree that your 7060’s ripper wheel slippage is better for its drivetrain than it being overly weighted down & cemented to ground. Plowing in field tile is mainly about your Field’s soil conditions. Excessively dry, compacted, and/or extremely hard pulling soils may require a pre-pass using your field-tile plow set at a shallower depth? Depending on total acreage, your 7060 may suffice for your (pull type?) homemade tile plow, if low acres?? If acreage is higher and/or pre-pass plow doesn’t equate, then possible higher hp/hydraulics plow vehicle may be more beneficial? If the later is the case, then a track type self-propelled integrated hitch tile plow’s 60,000+ lbs weight usually exceeds a 30,000+/- lbs 4wd tire tractor trailing a pull type tile plow setup. Each may have equal 400-500 hp, but their weights become major players for plowing field tile efficiently. |
Posted By: DrAllis
Date Posted: 11 Oct 2020 at 1:01pm
| The 7580 tractor was essentially a high speed (2550 rated) 7080 engine and tranny with 7040 axles. The transmission was designed to take the torque/HP at a higher engine speed. Installation of a higher torque/slower rated RPM engine is asking for trouble. |
Posted By: DougG
Date Posted: 11 Oct 2020 at 1:34pm
| Thanks for verifing this Dr Allis , as alot seem to forget all this and just complain when everything blows apart,, |
Posted By: AC7060IL
Date Posted: 11 Oct 2020 at 5:10pm
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Posted By: DrAllis
Date Posted: 11 Oct 2020 at 6:37pm
| You aren't putting all the HP thru one axle. You expect each axle to take half of 220 flywheel HP, which is lower than a 7040 would produce. They did use the heavier rear ends in the 8550/4W-305 and rightly so. I should have expanded my earlier comment about the transmission strength to include the fact that a 7580 with duals usually weighs 24,000 lbs. When that 220 HP engine pulls down because there is very little wheel slippage, the transmission has to endure all that stress. Slow the engine speed down and increase the torque/twist force (8.3 Cummins) you are flirting with trouble !! |