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8070 turns by itself
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Shivvets View Drop Down
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Joined: 20 Jan 2022
Location: Iowa
Points: 8 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Shivvets Quote  Post ReplyReply Direct Link To This Post Topic: 8070 turns by itself
    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.
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I M Fedup View Drop Down
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Joined: 01 Jul 2020
Location: Winchester Ky
Points: 27 		Post Options Post Options   Thanks (0) Thanks(0)   Quote I M Fedup Quote  Post ReplyReply Direct Link To This Post 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? 
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Joined: 23 Dec 2020
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Points: 2022 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Codger Quote  Post ReplyReply Direct Link To This Post 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. 
A career built on repairing and improving engineering design deficiencies, shortcomings, and failures over 50 years now.
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Joined: 20 Jan 2022
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Points: 8 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Shivvets Quote  Post ReplyReply Direct Link To This Post Posted: 21 Feb 2024 at 12:38pm
Sorry for my ignorance on this, but how would I do that?
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Joined: 23 Dec 2020
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Points: 2022 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Codger Quote  Post ReplyReply Direct Link To This Post 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.
A career built on repairing and improving engineering design deficiencies, shortcomings, and failures over 50 years now.
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