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JD 2640 Hydraulic problems

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Pat

05-27-2003 06:46:57




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I recently purchased a used JD 2640 with a loader and after using it for an hour the hydraulics starting slowing down and quit. The loader was working very well at first and then started hopping like the main pump is starving for oil. I checked the filter screen tube and it was clean. I know that some 2640's had trouble with the pickup tube. Does anyone know how to verify the tube or possibly the supply pump. Also need to know where I can get a good service manual.

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Pat

05-28-2003 04:10:50




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 Re: JD 2640 Hydraulic problems in reply to Pat, 05-27-2003 06:46:57  
Filter was stopped up. Thanks for your help



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will

05-28-2003 19:21:34




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 Re: Re: JD 2640 Hydraulic problems in reply to Pat, 05-28-2003 04:10:50  
Pat Seems funny it stopped up all at once. If this problem accurs again soon, and the filter has brass flakes suspect that it needs brakes. This is a common problem when people report that their hydrolic filter stopped up. I hope in your case that is was just due for a filter.



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Brokenwrench

05-27-2003 10:42:13




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 Re: JD 2640 Hydraulic problems in reply to Pat, 05-27-2003 06:46:57  
Check and replace the hyd. filter first.If the tractor has independent pto(lever between the shifters),try turning the pto on and see if your loader functions come back to normal. If so, you have an internal leak in the pto circuit. Another check would be to start the tractor and let it run at 1500 rpm for a half hour. Go around the tractor and feel the remotes, steering valve,and if the loader has an independent valve,feel it also. If any of the components are warm/hot to the touch,this indicates an internal leak in that component,that is bleeding off hydraulic pressure. If all of these components are not malfunctioning, then you have an internal leak, possibly from a feed line,cracked suction tube,or malfunctioning charge pump. Your best bet is the manual from Deere,it is alot more concise than the aftermarket manuals.

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davidval

05-27-2003 08:26:29




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 Re: JD 2640 Hydraulic problems in reply to Pat, 05-27-2003 06:46:57  
did you replace the trans/hydraulic filter? its the first thing to do when you have an hydraulic problem (actually second, first is checking oil level...).
it is in the front right bottom of the transmission.
david



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