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Hydraulic PSI

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wallacedw

11-13-2007 19:08:37




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Does anyone know the normal PSI for my 1956 Farmall 400? I think it is 2000 psi but maybe not. The ag-krane I am looking at: Link

It says it runs with 2500 psi. So could I still use the ag-krane and it would just be slower (and not able to do maximum weights in the brochure) or is it something to just give up on? I would ask if puttng a higher psi pump on would work but then it would change the parameters on the rest of the tractor (hose pressures, power steering, etc... I think.. Ideas

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wallacedw

11-14-2007 08:28:44




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 Re: Hydraulic PSI in reply to wallacedw, 11-13-2007 19:08:37  
Sure glad I asked!

As far as a PTO driven hydraulic setup... is it possible and/or practible? I really like the concept and functioning of that ag-krane but I won't get a different tractor just to use it. My grampa used a Farmall C for 40 years on his diary farm, small bales and a rake and sickle mower, guess I can too.third party image

Thanks for all the resposes, I can't wait to go to some tractor shows!

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Nat 2

11-13-2007 21:58:04




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 Re: Hydraulic PSI in reply to Nat 2, 11-13-2007 19:08:37  
Just cut the lift capabilities of that agkrane thing about in half with the 400's 1250PSI hydraulic system. If it says it'll lift 2000lbs, you'll only get about 1000 out of it with your 400. If that's acceptable, then you're good.

The 400's hydraulic pump is early technology. 1250PSI, and 12GPM if I'm not mistaken. Low pressure, low flow. It was a huge step up from what was available previously, but about half of what modern hydraulic systems put out.

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K.B.-826

11-13-2007 21:39:06




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 Re: Hydraulic PSI in reply to wallacedw, 11-13-2007 19:08:37  
With any hydraulic system, the two main factors are flow and pressure. Flow translates into how fast the work can be done, and pressure translates into how much work can be done. On a tractor like your 400, the pump is what determines how much flow is avalible, and the relief valve controls max pressure, so changing out the pump would not be a good starting point. That brings us to hydraulic cylinders. A cylinder with a small diameter requires more pressure to lift the same amount of weight than a large diameter cylinder. So, you could go to a larger cylinder, but the drawback would be that it would take much longer to extend, since it takes more flow to operate.

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old

11-13-2007 21:11:04




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 Re: Hydraulic PSI in reply to wallacedw, 11-13-2007 19:08:37  
Vets right on the money unless the I-T manual is wrong. I know when we tested the PSI on a 450 it was around the 1200 PSI mark



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the tractor vet

11-13-2007 20:05:31




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 Re: Hydraulic PSI in reply to wallacedw, 11-13-2007 19:08:37  
No a 400 only has at best in good shape around 1250 lbs and around 12 GPM. Ya want something with better hyd. then ya got to move on up into at least a 06 series and then ya have to have it checked and may have to install a higher pressure relief as stock they were 1750 .



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edward_m

11-13-2007 20:04:52




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 Re: Hydraulic PSI in reply to wallacedw, 11-13-2007 19:08:37  
I don't think you have to worry....2500 PSI is probably the max the unit is designed for. If your under that, it just means you cant lift as much.

My Dad has a Westendorf loader on a 666 IH, and the hydrolics limit out at less than a 2000 pound load. I think it has allot to do with the load PLUS the loader weight that limits him (its a big loader). Plus the 666 pump might be a little weak: after all, the tractor is only 33 years old.

A 400 didn't have the highest pressure either.....I mean, what did they use back then that needed that kind of pressure?

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edward_m

11-13-2007 20:06:26




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 Re: Hydraulic PSI in reply to edward_m, 11-13-2007 20:04:52  
.....and don't forget that a Super M, which the 400 replaced, only had approx 850 PSI.



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edward_m

11-13-2007 20:09:24




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 Re: Hydraulic PSI in reply to edward_m, 11-13-2007 20:06:26  
But then, if you really wanted to, you could look into a pto driven hydro pump....maybe that would get you the pressure you want?



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