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Case Tractors Discussion Forum
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400 hydraulic problems

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jking70

04-02-2013 13:49:59




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I have a 410 model that I can't get any hydraulic pressure for the remotes. eagle hitch has very little down pressure I have tried a different pump changed the fluid and the couplers for the remotes and still not enough pressure to lift my swather. Any help or ideas would be very helpful. Thanks




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Doc Larry

04-03-2013 05:23:22




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 Re: 400 hydraulic problems in reply to jking70, 04-02-2013 13:49:59  
I don"t think the Eagle hitch has down pressure on this model.



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Adirondack case guy

04-02-2013 14:42:05




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 Re: 400 hydraulic problems in reply to jking70, 04-02-2013 13:49:59  
Relief valve.
Loren



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Chuck Machinist

04-02-2013 14:39:27




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 Re: 400 hydraulic problems in reply to jking70, 04-02-2013 13:49:59  
Im sorry, the working pressure on the guage should read between 1175 and1225Psi with fluid temps around 100 degrees and the PTO turning at 250 RPM



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Chuck Machinist

04-02-2013 14:29:00




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 Re: 400 hydraulic problems in reply to jking70, 04-02-2013 13:49:59  

A Low fluid in hyd housing B relief valve spring weak.
C Partly plugged screen on inlet pipe. D Hose line is flaking,collapsed,or is plugged
E Worn or damaged pump body,pump cover,pump gears,pumpgear bearingor gear shafts Remedy-Always check pressure with 4501AA Pressure guagebefore disassembling pump, Fill housing to level plug,Install new relief spring and recheck pressure, remove inlet pipeand clean screen.Flush out housing,replace damaged hose.Flush out system, I hope this will be a good start for you. Good Luck Chuck

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jking70

04-02-2013 16:56:05




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 Re: 400 hydraulic problems in reply to Chuck Machinist, 04-02-2013 14:29:00  
Thanks Chuck
I have cleaned the screen and filter tried different relief valve, have not changed hoses yet but will soon and pick up a pressure gauge to install in the test port.



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