Farm Equipment - Allis 7000

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Allis 7000

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=210089
Printed Date: 16 Feb 2026 at 9:10pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: Allis 7000

Posted By: Empirestate
Subject: Allis 7000
Date Posted: 16 Feb 2026 at 5:56pm

hello all,

New member here. Been a lurker for a while and have gleaned a lot of useful information. Now I have a problem I could use some help. 1978 Allis,7000. It does not have differential lock, but all of a sudden it acts like it does. Just driving tractor only it steers, but with a round bale on the 3 pt. You can't turn it, not even using the breaks. I suspect something is wrong in the final drive, but what? Thanks for any help

Bob

Replies:

Posted By: DrAllis
Date Posted: 16 Feb 2026 at 6:18pm

The differential is locked up. There is a dipstick directly behind the cab under the SMV sign. I'm guessing your PTO seals have been leaking oil and that compartment is very low on oil. Wheels have to come off. Axles get pressed out of their tubes. Brakes/brake housings come off. Lift arm housing comes off next. Then, you are down to the differential with the ring gear. Cab might have to be lifted a little, but not removed.