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Tractor Talk Discussion Forum

jerking in hydraulics

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ALAN BANE

10-25-2006 16:49:20




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What causes a jerking in the hydraulics and it seems worse in cooler weather.It's in an 800 Ford tractor?




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Richard H.

10-26-2006 06:48:51




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 Alan, Look a THIS in reply to ALAN BANE, 10-25-2006 16:49:20  
It nay be debris in your control valve, Richard



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Mitch Furness

10-26-2006 01:37:23




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 Re: jerking in hydraulics in reply to ALAN BANE, 10-25-2006 16:49:20  
Alan have you tried cleaning the hydraulic oil filter?



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al bane

10-26-2006 06:17:08




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 Re: jerking in hydraulics in reply to Mitch Furness, 10-26-2006 01:37:23  
I Have THE SHOP MANUAL AND THE OWNERS MANUAL ON THE 800 FORD SERIES AND IT DOESN'T SHOW A HYDRAULIC FILTER IN EITHER BOOK.



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Ryan - WI

10-25-2006 17:17:12




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 Re: jerking in hydraulics in reply to ALAN BANE, 10-25-2006 16:49:20  
Air in the system is the number one cause of jerky hydraulics.



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al bane

10-25-2006 18:46:43




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 Re: jerking in hydraulics in reply to Ryan - WI, 10-25-2006 17:17:12  
how do you get it out?



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J Schwiebert

10-25-2006 19:06:39




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 Re: jerking in hydraulics in reply to al bane, 10-25-2006 18:46:43  
Better do a little better job of explaining this jerky hydraulic system. Is it for a remote cylinder or the 3 point hitch?



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135 Fan

10-25-2006 20:27:40




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 Re: jerking in hydraulics in reply to J Schwiebert, 10-25-2006 19:06:39  
Check if the fluid is low. Maybe the suction line for the pump has a tiny leak. Could also be the control valve but not likely. On my skid steer they had to put a damper on the end of the lift valve to stop the lift cylinders from "chattering" almost violently. I really doubt this is the problem as you wouldn't have a Salami control valve. Good luck Dave



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al bane

10-26-2006 06:04:47




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 Re: jerking in hydraulics in reply to 135 Fan, 10-25-2006 20:27:40  
I changed fluid in it this spring and used hydraulic-transmission fluid to replace it. I t is a three point with the hydraulic pump under the seat. The fluid level is full. The lift will let down some when your using it but will raise back up and correct itself on it's own. Now , since it's gotten colder ,the tractor vibrates some due to the jerking of the hydraulics.I was wondrting if the fluid was too heavy or maybe the system may be bled.

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