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JD 850 Jerking Hydraulics

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Doug Spalding

12-11-1999 09:06:58




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I know this tractor shares transmission and hydraulics with the same pump and oil. Mine is suddenly acting jerky, even when warm. The power steering is the same way. I can hear the pump squealing and the oil level is correct. Have I lost a seal or bearing in the pump? If so, is this something I have a hope of repairing myself, or is it one of those factory authorized deals?
Thanks, in advance,
Doug

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Dale

12-12-1999 08:36:29




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 Re: JD 850 Jerking Hydraulics in reply to Doug Spalding, 12-11-1999 09:06:58  
I had a simular problem on my JD 850. It didn't squeel very loud but it was very jerky. I had a dirty hydraulic oil filter and a little water in the oil. A little water goes a long way! You have likely already checked these but I thought I'd give it a try. Good luck



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Jack Winnebrenner

10-25-2000 07:26:18




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 Re: Re: JD 850 Jerking Hydraulics in reply to Dale, 12-12-1999 08:36:29  
I looking for John Deere tractor hood (850).And other different parts.It you happen to know somebody who have any tractor parts please call Richland High School area code is (573). Ask for Jack Winnebrenner,shop teachers.Thanks for helping.



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Doug S

12-13-1999 06:37:32




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 Re: Re: JD 850 Jerking Hydraulics in reply to Dale, 12-12-1999 08:36:29  
I guess it's due for a hydraulic oil and filter change. Thanks to all.
Doug



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Dan

12-11-1999 13:17:40




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 Re: JD 850 Jerking Hydraulics in reply to Doug Spalding, 12-11-1999 09:06:58  
Check to see if you do not have one of your hyd. levers in the float position. That position by-passes apart of the hyd's. If that is not the case then if sounds as though you will need to get someone to run a pressure test and a gallion per min. flow test. That will tell you alot about the tractor.



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