7580 won't 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=194643
Printed Date: 19 Jul 2025 at 5:27pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: 7580 won't move
Posted By: crow
Subject: 7580 won't move
Date Posted: 16 Apr 2023 at 11:01am
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i bought an Allis Chalmers 7580 last year and when using it to cultivate , it stopped moving. The PTO , hydraulics and steering all work but it won't move in either forward or in reverse. Any ideas as to why? thanks
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Replies:
Posted By: victoryallis
Date Posted: 16 Apr 2023 at 1:07pm
BTDT
Seems like it was a shaft on the bottom of the transmission snapped. Cab needed to be tilted way back to do it.
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8030 and 8050MFWD, 7580, 3 6080's, 160, 7060, 175, heirloom D17, Deere 8760
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Posted By: MikeKroupa
Date Posted: 16 Apr 2023 at 7:15pm
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Check the transmission/dropbox coupler. Remove the plate underneath the battery box and take a look. Good Luck, Mike
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Posted By: MACK
Date Posted: 16 Apr 2023 at 8:12pm
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Took the splines out of PD hub. MACK
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Posted By: crow
Date Posted: 19 Apr 2023 at 8:37am
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Thanks for the ideas as to what is wrong. When I get it in the shop we will have a look.
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Posted By: CAL(KS)
Date Posted: 19 Apr 2023 at 9:11am
second trans output shaft coupler. done one
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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: Lynn Marshall
Date Posted: 19 Apr 2023 at 11:00am
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If the splines are gone in the power director hub like Mack says,then you should be able to put it into gear without any gear grinding. This is with the engine running and the clutch pedal up.
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Posted By: crow
Date Posted: 19 Apr 2023 at 8:45pm
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No it is still grinding when i put it in gear.
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Posted By: DrAllis
Date Posted: 19 Apr 2023 at 9:04pm
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Then, I would think that if you put it 5th gear, release the clutch, throttle up a bit and step on the hi button, you should "hear" things whirring under the cab floor. This is with the range trans in low range. That to me would mean the coupler after the transmission, not the clutch housing splines.
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Posted By: Adam Stratton
Date Posted: 19 Apr 2023 at 10:59pm
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No chance the range lever popped out of gear? Does it act the same way in both ranges? Had a cable break on the range selector on an older steiger the other day and acted a lot like you are describing
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Posted By: shameless dude
Date Posted: 20 Apr 2023 at 3:20am
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the floor buttons not stuck halfway? sometimes dirt gets down around them
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Posted By: victoryallis
Date Posted: 20 Apr 2023 at 7:14am
Along Shameless’s lines I had to run my 7580 in high for a few years. Big heavy zip tie saved the day.
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8030 and 8050MFWD, 7580, 3 6080's, 160, 7060, 175, heirloom D17, Deere 8760
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