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4020 Bursting Power Steering hoses

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Bradin Ala

05-18-2012 13:48:46




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My 4020 keeps bursting power steering hoses. Has anyone had this problem? Is there any pressure adjustments that can be made to lessen the pressure?




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david G

05-19-2012 17:59:55




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 Re: 4020 Bursting Power Steering hoses in reply to Bradin Ala, 05-18-2012 13:48:46  
More 4020 saga, it is leaking hydraulic out of the steering column today. I believe one of the lines is leaking. It is leaking about a gallon an hour, and there are 6 hours left to plant. We are hoping to get done with it.



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Tim S

05-19-2012 04:12:55




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 Re: 4020 Bursting Power Steering hoses in reply to Bradin Ala, 05-18-2012 13:48:46  
The supply lines that I think you are talking about should never have more than system pressure (2250psi) on them, no matter what goes on in the steer valve. I'm still leaning to vibration being the probable cause for line failure. A lot of times when steer valves are removed these line clamps don't make it back in place..



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Tim S

05-18-2012 18:00:37




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 Re: 4020 Bursting Power Steering hoses in reply to Bradin Ala, 05-18-2012 13:48:46  
One of the reasons that line fails is the hold down clamps have been left off some where along the line and vibration works on them till they fail..



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Jbarbee77

05-18-2012 14:02:32




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 Re: 4020 Bursting Power Steering hoses in reply to Bradin Ala, 05-18-2012 13:48:46  
Is it that little steel line behind the panel at your feet?
If it is, I have the same problem. When one pops we just make a new line. It will last about six mouths and pop another.
If you find out let me know.

Jason



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Bradin ala

05-18-2012 14:32:11




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 Re: 4020 Bursting Power Steering hoses in reply to Jbarbee77, 05-18-2012 14:02:32  
Yes it is the one. Thanks for your reply.



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Jbarbee77

05-18-2012 16:42:33




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 Re: 4020 Bursting Power Steering hoses in reply to Bradin ala, 05-18-2012 14:32:11  
DO NOT get the kit that John Deere says will fix it. Dontt waste your money. It has two metal fittings and a rubber line, and two clamps. I put that kit on one of my tractors, and the motor didnt start till the that rubber line was busted.



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WTW

05-18-2012 20:32:43




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 Re: 4020 Bursting Power Steering hoses in reply to Jbarbee77, 05-18-2012 16:42:33  
The replacement oil line and hose is more than adequate to handle normal oil flow and pressure from the stering valve case drain. Problem is when this line burst or leaks, steering valve has allot more than normal oil flow and pressure on it due to internal leakage of steering valve seals and orings. Long story short replacing the line is not repairing the problem. Remove and reseal steering valve and the line will no longer be a issue. I have done two of these steering valves in the last three weeks. Pretty common repair on these old tractors.

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Jbarbee77

05-19-2012 19:58:01




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 Re: 4020 Bursting Power Steering hoses in reply to WTW, 05-18-2012 20:32:43  
Thanks WTW, I will make the repair ASAP. I have found ALOT of good info on this forum. Thanks again.



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Bradin Ala

05-19-2012 07:38:04




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 Re: 4020 Bursting Power Steering hoses in reply to WTW, 05-18-2012 20:32:43  
Thanks WTW for the info. I thought excessive pressure was a problem, but didn't know what I needed to do. I knew someone would know what to do. You people sure are helpful. Hope I may be able to repay the help sometime.



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