Farm Equipment - 8070 turns by itself

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8070 turns by itself

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=199913
Printed Date: 23 Sep 2024 at 11:25pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 8070 turns by itself

Posted By: Shivvets
Subject: 8070 turns by itself
Date Posted: 20 Feb 2024 at 6:00pm

What would cause our 8070 to want to turn the steering wheel and wheels to the left when the tractor is sitting running in park? We just replaced the hydraulic oil filter and it started after that.

It acts up worse when the oil is cold.

Replies:

Posted By: I M Fedup
Date Posted: 20 Feb 2024 at 7:41pm

What comes to mind is a problem with the centering springs in the steering valve. If you turn the steering wheel will it steer back in the other direction?

Posted By: Codger
Date Posted: 20 Feb 2024 at 7:50pm

Orbital steering valve has air in it from the changeout of the filter breaking the system integrity. You need to cycle the steering full lock to lock several times and it will purge.

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A career built on repairing and improving engineering design deficiencies, shortcomings, and failures over 50 years now.

Posted By: Shivvets
Date Posted: 21 Feb 2024 at 12:38pm

Sorry for my ignorance on this, but how would I do that?

Posted By: Codger
Date Posted: 21 Feb 2024 at 1:03pm

Full left with the steering wheel, then full right several times against the steering stops.. Could take a dozen times but is usually faster if oil is hot. I like to raise front end clear of the floor so not grinding the tires.

Not an ignorant question at all.

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A career built on repairing and improving engineering design deficiencies, shortcomings, and failures over 50 years now.