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Farmall & IHC Tractors Discussion Forum
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450 hdy?

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Hoss357

01-08-2008 14:32:16




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guys i havn't tried anything yet still working but was wondering can you put oil in the plug on the pump to help prime it or is this a no no?




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SDE

01-08-2008 16:53:25




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 Re: 450 hdy? in reply to Hoss357, 01-08-2008 14:32:16  
There is a spring and a ball under that plug. Remove carefully and you will not lose anything. When I primed mine that way, I was surprised how little it took to fill. It primed its self quickly after doing it.
SDE



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Janicholson

01-08-2008 14:58:56




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 Re: 450 hdy? in reply to Hoss357, 01-08-2008 14:32:16  
The little plug on the top is for that purpose. I would use a squirt oil can and a little piece of rubber hose to make a seal and pump it full, several oil can containers would be my starting point. JimN



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Wardner

01-08-2008 15:26:53




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 Re: 450 hdy? in reply to Janicholson, 01-08-2008 14:58:56  
I use the little spring loaded ball plug for priming as well.

I never understood why some people pressurize the reservoir. Theoretically, that procedure should not work as both ports would get pressure on a open center system. That situation would cancel flow through the pump. If one of the work valve levers was moved off center, it might work but why go to the trouble of setting up the air hose.

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Janicholson

01-08-2008 17:25:29




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 Re: 450 hdy? in reply to Wardner, 01-08-2008 15:26:53  
I have used it, and had it succeed. The principle is that if 35psi is put in the res, the bubbles will be about 35 to 40% of their size at atmospheric pressure. This allows the bubbles to be swept up and moved within the system easier. The smaller bubbles also allow additional hydraulic fluid to pull in where they had been. It does work, not always, but it is not a mistake. JimN



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