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John Deere Tractors Discussion Forum
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john deere 500c

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atmsoft

09-07-2006 19:11:38




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changed filters under transmission, hydro fluid but still hydraulics suck. am i missing a filter?
They worked fine before i blew a hose.




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buickanddeere

09-09-2006 05:55:15




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 Re: john deere 500c in reply to atmsoft, 09-07-2006 19:11:38  
The hose may not have been the problem but a symtom? Perhapes there was a pump or drive failure due to the very high pressure?



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Roy Suomi

09-08-2006 21:06:34




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 Re: john deere 500c in reply to atmsoft, 09-07-2006 19:11:38  
I'de put my money on a stuck pressure relief valve. This is found under the black dash cover..Poppet might be stuck inside the valve spool..Been known to flatten out the shim washers and cause the valve poppet to stick in it's bore of the spool..If you take it out the spring , shims , and poppet should fall out..Don't loose the shims....



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Glen in TX

09-08-2006 16:12:05




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 Re: john deere 500c in reply to atmsoft, 09-07-2006 19:11:38  
You'll have to drain the oil again to check it but there is a pump intake screen inside the transmission just like on other JD new generation tractors. You'll see it in parts catalog under sectional index as transmission filters and pump intake. The screen is under a round plug that screws out and screen is round and about 10-12" long plastic or metal. You can just clean it but many times it needs replaced. Could also be relief valve or check valve also like talked about in several post above by Gerald J on a 4020. If someone has replaced pump suction steel lines with hoses make sure those aren't collapsing on suction side also. Good luck with it.

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