7580 wont move
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=130127
Printed Date: 02 Jun 2025 at 6:03pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: 7580 wont move
Posted By: Gary7580
Subject: 7580 wont move
Date Posted: 17 Oct 2016 at 6:02pm
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I have a 7580 its a 1981 with 2082 hours on it. I'm in the process of painting it and fixing it up. One day I went to start it up and let it run for a little bit and notice my rear pto wasn't spinning. I put it in gear and nothing. I tried different things but nothing. I hope its not the torque limiter but if anybody has other options please let me know, thanks!!!
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Replies:
Posted By: MACK
Date Posted: 17 Oct 2016 at 9:45pm
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Will it steer? Will any shaft turn going to rear boggy turn? Sounds like TL hub or splines in PD. If it steers, PD. If no steering, TL. MACK
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Posted By: darrel in ND
Date Posted: 17 Oct 2016 at 10:21pm
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welcome to the forum, Gary. Too bad you had to have troubles with an allis to bring you on board, but you come to the right place for AC knowledge. Darrel
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Posted By: victoryallis
Date Posted: 17 Oct 2016 at 10:24pm
Hmmm sounds like my 7580. Moving one minute dead the next. Mine steered fine and hydraulics functions. Currently in 600 pieces. Hopefully she will be back going before Halloween. Mechanic thinks the coupler going into the dropbox failed.
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8030 and 8050MFWD, 7580, 3 6080's, 160, 7060, 175, heirloom D17, Deere 8760
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Posted By: MACK
Date Posted: 18 Oct 2016 at 6:29am
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If couppler in dropbox failed, front would pull but rear would not. Stripped splines out of PD clutch. MACK
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Posted By: darrel in ND
Date Posted: 18 Oct 2016 at 7:07am
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My 7580 is down has been for 5 or 6 years now, with something locked up in the transmission. Been saying that I am going to fix it next year ever since it happened, and I guess next year just never comes, or something like that anyway. I sure do miss that old girl. It's not a real power house, but it's just plain fun to operate. I pulled a 24 foot concord air seeder with it mostly, but where it really shined, was on my 1,000 gallon, 100 foot flexi coil sprayer. Just rode so smooth. If I get er going again, it'll be my planter and sprayer tractor. Darrel
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Posted By: CAL(KS)
Date Posted: 18 Oct 2016 at 9:32am
second the drop box coupler. ours did this, can be replaced by pulling rear cover of drop box which contains the hyd pump and gearing for rear pto shaft. the top gear stub shaft splines are bad or the coupler is bad. ours was just the coupler. can be done with cab on.
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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: victoryallis
Date Posted: 18 Oct 2016 at 12:32pm
Mechanic came back today. Dropbox was ok ends up shaft going from tranny to dropbox failed. So now we go tranny searching.
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8030 and 8050MFWD, 7580, 3 6080's, 160, 7060, 175, heirloom D17, Deere 8760
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