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Case Tractors Discussion Forum
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Case 401 hydraulics

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Markloff

11-30-2004 23:52:09




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Is it possible to put a later model hydraulic pump in the Case 401 diesel? Will a 730 or a 830 bolt right in? I know that a stock 401 puts out 12 gpm. How about a later model Case?

Thanks, Mark




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John Saeli

12-01-2004 04:32:50




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 Re: Case 401 hydraulics in reply to Markloff, 11-30-2004 23:52:09  
Hey Markloff: The pump from an Eagle Hitch 730 or 830 will work.



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Markloff

12-01-2004 14:39:18




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 Re: Case 401 hydraulics in reply to John Saeli, 12-01-2004 04:32:50  
How much extra flow will this give me?



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John Saeli

12-01-2004 17:24:36




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 Re: Case 401 hydraulics in reply to Markloff, 12-01-2004 14:39:18  
Hey Markloff: None. The pump specs are the same. Believe it or not, an SC pump has more volume than a '64 830.



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Markloff

12-01-2004 18:56:01




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 Re: Case 401 hydraulics in reply to John Saeli, 12-01-2004 17:24:36  
So upping the pressure is the only thing a guy can do? Do you know how much the relief valve can safely be tweaked? Stock runs about 1230 with the eagle hitch I believe. Can it safely be set to 1500-1800? If so how?

Thanks, Mark



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John Saeli

12-01-2004 19:24:05




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 Re: Case 401 hydraulics in reply to Markloff, 12-01-2004 18:56:01  
Hey Mark: On the top of the valve body, is a large cap-nut. That contains the relief valve ass'y. Take the cap off & add a flat washer on top of the spring. If the pump isn't worn & is able to build pressure, shimming the spring, will add pressure.



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markloff

12-01-2004 22:20:19




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 Re: Case 401 hydraulics in reply to John Saeli, 12-01-2004 19:24:05  
Any dangers in doing this? I wouldn't want any thing to explode on me. We all know where the Case hydraulics are located. Kinda like crapping on a land mine if something let loose!



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John Saeli

12-02-2004 04:33:25




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 Re: Case 401 hydraulics in reply to markloff, 12-01-2004 22:20:19  
Hey Mark: You will have no problem with the system handling 1800PSI. I have my doubts that the pump can deliver that pressure because of years of wear.



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alvinnms

12-09-2004 14:30:31




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 Re: Case 401 hydraulics in reply to John Saeli, 12-02-2004 04:33:25  
Hydraulic pumps create flow - not pressure. Resistance to flow creates pressure. Flow determines actuator speed. Pressure determines actuator force. Fluid under pressure takes the path of least resistance. When fluid moves from an area of high pressure to an area of low pressure (pressure drop) without performing useful work, heat is generated.



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