School me on 7580's
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=111969
Printed Date: 14 Sep 2025 at 2:35am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: School me on 7580's
Posted By: Peterson
Subject: School me on 7580's
Date Posted: 14 Sep 2015 at 3:44pm
|
Well guys, bought a 1981 7580 Serial number 2803 at a auction over the weekend. Top pivot needs to be rebuilt, so its at the local dealer for that. Top shaft vibrates and has slop. Whats the best way to go about that? New or rebuilt old shaft? Anything else to look for? Overall the tractor don't "look" half bad. Planning on new cab kit, hopefully can order a grey kit for it. But anything else to look for? let me know. Thanks Guys ------------- 7095-685I at 255hp, 8070-225HP,8050-210Hp,8030 with 155HP,220 with 670T engine with A-pump, 7580, 185 with 140HP, 2-6080's,6070, S4 D17,wd45,CA,st34 agco, S1 D17 with 3500MK2 |
Replies:
Posted By: GM Guy
Date Posted: 14 Sep 2015 at 10:33pm
|
Pics of it! As far as the top shaft, my 81 that was bought earlier in the year has the same issue, the CV joint and rear u-joint seem great, so I think I will have a local well reputed driveline shop weld in a new slip yoke. Dad's new 7580 (1978 or 79, IIRC just traded 6 older new holland balers for it, IMO he did well, he thinks I talked him into it and it wasn't a good deal :) ) has a aftermarket setup with no CV joint, but I think only on the bottom shaft for driving the rear axle. It has a large "pillow block" bearing bolted to a threaded piece of solid square stock that is welded to the frame. I need to look at it, but I think it still has a slip yoke, but no more CV, and 3 u-joints instead. As far as advice, I am still quite the 4wd allis amateur, but I will repeat what has been told to me. Grease it daily with good grease! :) my 81 7580 was religiously greased by the PO, and it shows. no hinge slop at all. ------------- Gleaner: the properly engineered and built combine. If you need parts for your Gleaner, we are parting out A's through L2's, so we may be able to help. |
Posted By: CAL(KS)
Date Posted: 15 Sep 2015 at 4:56am
|
CV joint on top shaft needs replaced. Sounds stupid but last few years it has been cheaper to get new CV's for our 8550's than have rebuilt. also check the splines in the telescoping part of the shaft, they can get sloppy and cause vibration also ------------- 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 |
Posted By: Peterson
Date Posted: 15 Sep 2015 at 6:42am
http://s460.photobucket.com/user/17cumminsboy/media/FB_IMG_1442098903904_zpsclwswsje.jpg.html" rel="nofollow"> Me and the old bag. Lol get better pic later. ------------- 7095-685I at 255hp, 8070-225HP,8050-210Hp,8030 with 155HP,220 with 670T engine with A-pump, 7580, 185 with 140HP, 2-6080's,6070, S4 D17,wd45,CA,st34 agco, S1 D17 with 3500MK2 |
Posted By: aras
Date Posted: 15 Sep 2015 at 7:10am
| That's not that beat up -- we went and looked at it. You didn't buy the 8010 too? |
Posted By: Peterson
Date Posted: 15 Sep 2015 at 7:13am
|
No 8010 went to another allis guy by Abbotsford. Tranny is junk in the 8010 though. The 7580 needs engine work. Injectors are in backwards.... ------------- 7095-685I at 255hp, 8070-225HP,8050-210Hp,8030 with 155HP,220 with 670T engine with A-pump, 7580, 185 with 140HP, 2-6080's,6070, S4 D17,wd45,CA,st34 agco, S1 D17 with 3500MK2 |
Posted By: aras
Date Posted: 15 Sep 2015 at 7:17am
| Stuff went cheap didn't it? I should have went and bought a corn head for parts. |
Posted By: aras
Date Posted: 15 Sep 2015 at 7:18am
| Not all 5.9 Cummins are created equally either -- lol |
Posted By: Peterson
Date Posted: 15 Sep 2015 at 7:55am
|
Yeah. This is a "53" block cummins in the 8010. So sooner or later she will crack. ------------- 7095-685I at 255hp, 8070-225HP,8050-210Hp,8030 with 155HP,220 with 670T engine with A-pump, 7580, 185 with 140HP, 2-6080's,6070, S4 D17,wd45,CA,st34 agco, S1 D17 with 3500MK2 |
Posted By: Peterson
Date Posted: 15 Sep 2015 at 11:59am
|
On the top CV joint shaft, I'm I correct that it is a 6C series joint? ------------- 7095-685I at 255hp, 8070-225HP,8050-210Hp,8030 with 155HP,220 with 670T engine with A-pump, 7580, 185 with 140HP, 2-6080's,6070, S4 D17,wd45,CA,st34 agco, S1 D17 with 3500MK2 |