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John Deere Tractors Discussion Forum
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2640 hydraylic chatter

Author  [Modern View]

11-18-2013 16:34:29

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Recently I posted I was having hydraulic chatter. As suggested i put in new filter and checked the sump screen. the Sump screen had some plastic particles in it possibly caused by a cylinder problem on the loader. I have read on here about the the rocker shaft that was repaired about 5 years ago, Brakes were repaired about 10 years ago the tractor really isn't used that much. Currently when the tractor has set a few days when I start it the steeriing and rock shaft work almost immediately I have a 146 loader that it takes about 5 minutes to be ready to operate. All hydraulics seem to operate ok. I still have the chatter. When I rev the tractor it seems to get worse at idle no chatter. The two outside steel lines vibrate a lot when revved up. Any ideas what may be wrong is it the pickup lines inside the tractor. Even though I chatter everything seems to work ok.Any ideas or input wiould be appreciated. Should I run the tractor or see about repairs right away. I read something about a filter in the pump would this cause chatter.

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Tx Jim

11-18-2013 16:54:39

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 Re: 2640 hydraylic chatter in reply to burnsg2003, 11-18-2013 16:34:29  
A worn stroke control valve seat or crankcase inlet valve cold cause chatter. Have you ever checked stand-by pressure? It should be around 2250 psi.

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