Farm Equipment - 7040 locking differential

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7040 locking differential

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=173443
Printed Date: 01 Sep 2025 at 11:27am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 7040 locking differential

Posted By: brad durst
Subject: 7040 locking differential
Date Posted: 09 Aug 2020 at 8:50pm

I'm going to be looking at a 7040 with a power director later this week. A tractor jockey has it and is saying he was told by the original owner it will only move if you lock In the differential. That makes no sense to me that is all hydraulic controlled and would not have anything to do with it not moving or am I missing something

Replies:

Posted By: MACK
Date Posted: 09 Aug 2020 at 9:10pm

Spider gears are out. MACK

Posted By: tbran
Date Posted: 09 Aug 2020 at 9:11pm

yup you are missing spider gears - and or cro$$ shaft in diff..

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