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John Deere Tractors Discussion Forum
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Re: john deere 2640 no hydraulics when resarting hot

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Author  [Modern View]

07-08-2014 17:56:35

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[quote="D-"](quoted from post at 18:22:59 07/08/14) Metallic is from worn out brakes. A maqgnet in the screen will help.

Check valve is probably laying in a drain pan somewhere.[/quote


I was thinking the metallic was from the previous brakes coming apart. Where would this check valve be located. Also it seems to me like when the oil is hot is all drain back to the sump. Is this even possible.

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07-08-2014 19:23:46

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 Re: john deere 2640 no hydraulics when resarting hot in reply to cowman79, 07-08-2014 17:56:35  
Hydraulic lines out of lower right front of tran to hyd pump.
Tx Jim will probably help you w/part pics.

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Tx Jim

07-09-2014 04:04:14

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 Re: john deere 2640 no hydraulics when resarting hot in reply to D-, 07-08-2014 19:23:46  
Check valve that D- referred to is parts keys 40-42(2nd photo). I think check valve isn't the hyd problem as check valve is to prevent hyd oil drain back during extended non-running periods of time.
I think your tractors hyd problem is a worn/pitted stroke control valve(parts key 42 & 43 1st photo) seat in frt hyd pump caused by the tiny metal particles.

This post was edited by Tx Jim at 04:06:00 07/09/14.

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07-09-2014 04:30:23

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 Re: john deere 2640 no hydraulics when resarting hot in reply to Tx Jim, 07-09-2014 04:04:14  
Quoting Removed, click Modern View to see

Can this be removed and check easily.

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Tx Jim

07-09-2014 06:52:12

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 Re: john deere 2640 no hydraulics when resarting hot in reply to cowman79, 07-09-2014 04:30:23  
No not very easy to access as SC valve seat has to be driven out.

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