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86Ford
New User
Joined: 24 Oct 2012
Posts: 4
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 Posted: Wed Oct 24, 2012 7:07 pm Post subject: Cracked hydraulic pump centre housing on Ford 8600 |
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Why would my hydraulic pump centre housing crack right in line with the lining pins on my Ford 8600 tractor? It is pump number FD5NN600C. I changed pump. Is there a check valve or something else I should check so this will not happen with my new pump.
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Bern
Tractor Expert
Joined: 05 Apr 1999
Posts: 2753
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| Posted: Wed Oct 24, 2012 8:11 pm Post subject: Re: Cracked hydraulic pump centre housing on Ford 8600 |
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Pin misalignment? Overtorque? Hard to say really. Those system relief valves are pretty reliable. Do you have a pic you could show us?
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jbirnsch
Regular
Joined: 30 Sep 2004
Posts: 338
Location: NE WI
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| Posted: Thu Oct 25, 2012 2:18 pm Post subject: Re: Cracked hydraulic pump centre housing on Ford 8600 |
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Have you checked the relief valve setting. You need a 3-4000 PSI gauge connected to a hose and a pioneer fitting. Plug it onto the remote output and check at a certain RPM. I believe it should be 2250 (manual not in front of me) PSI and every .010" of shim added is 100 PSI to the output pressure in the relief valve.
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showcrop
Tractor Guru
Joined: 13 Dec 2000
Posts: 7322
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| Posted: Thu Oct 25, 2012 6:16 pm Post subject: Re: Cracked hydraulic pump centre housing on Ford 8600 |
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Any more info? The center rear housing that it bolts onto should be supporting it so that it doesn't get any stress, unless there was a problem on the surface that it bolts up to.
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