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Farmall & IHC Tractors Discussion Forum
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Priority valve farmall power steering

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Tom Harvey

04-21-2007 04:37:03




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I bought from OEM power steering kit, my brother and I installed it. The steering works fine but no flow to the controls for the hydraulic cylinders. I have called OEM they faxed some info but couldn't read it will have to wait until Monday to call them back, we were kind of hoping to get it going. The valve is a HCI - Prince C454
it has a port labeled IN which we put the output of the pump there. on the oposite side were two ports a small one and a large one. we put the small one to the power steering and the larger one to the control valves. THere is a approx 7/8 " by 3/4" nut like device that has a port on the end. Anyway I was wondering if any one could tell me what ports I should be using and any info about the vavle..

THank you

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Tom Harvey

04-21-2007 05:17:42




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 Re: Priority valve farmall power steering in reply to Tom Harvey, 04-21-2007 04:37:03  
I went to HCI Prince i found a valve like it and we have it plumbed right. but have nothing coming out of the excess flow.. Either we need to adjust it or the pump isn't as strong as it should be but the pump in the past lifts the 3 pt hitch fine.. also the steering at an idle will turn the wheels no problem... hopefully its just adjustment



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Allan In NE

04-21-2007 08:13:47




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 Re: Priority valve farmall power steering in reply to Tom Harvey, 04-21-2007 05:17:42  
What kind of tractor? Do you have a picture of that valve?

Allan



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tom Harvey

04-21-2007 09:10:32




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 Re: Priority valve farmall power steering in reply to Allan In NE, 04-21-2007 08:13:47  
Allen

we put this on a farmall m that already has live hydraulics. Its a prince rd-450r-3 sold by OEm I went to prince web site since the post and have found a list of the ports, we have it plumbed right. Not sure what the problem is now. THanks

tom



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Brian Schmidt

04-21-2007 20:02:53




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 Re: Priority valve farmall power steering in reply to tom Harvey, 04-21-2007 09:10:32  
That is a relief valve as well as a priority valve. The excess flow will not get anything if the relief setting is not meet. Does the tractor seem to be laboring at all when not steering. Does the idle change when you steer? Also, you may be flowing enough oil through your steering motor (internal leakage) to prevent it from allowing the pressure to build. More diagnosis may help. Maybe try a ball valve going to the steering motor. Slowly start to close it off and see if the implements them start to work. Just be careful not to blow the pump up.

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Bob

04-21-2007 22:22:46




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 Re: Priority valve farmall power steering in reply to Brian Schmidt, 04-21-2007 20:02:53  
"The excess flow will not get anything if the relief setting is not meet."

That's NOT correct.

As soon as the rated "controlled flow" (3 GPM's) to the "CF" port (steering) is met, you will get flow out the "excess flow" port. The "relief valve" will operate ONLY when the pressure at the "CF" port reaches relief valve pressure (1500 PSI). (Steering wheel held against one of the end limits.) The ONLY time the relief valve in the flow divider will operate is... to protect the system when the pressure to the steering circuit exceeds 1500 PSI.

In other words, if the pump is putting out only about 3 GPM's, you will get little or no flow out the "EF" port.

If the pump is putting out 4 GPM's, you will get only about 1 GPM flow out the "EF" port. And so on.

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