I agree with armand... the separate pump is the best option. Dad had a JD 60 with a CharLynn torque motor (or torque generator) and a Saginaw (GM) pump and it worked perfectly. I have an IH 240U with CharLynn and a priority flow divider valve and although it's better than no PS, it is not consistant and is jerky. Also when idled down, it robs enough flow from the system that the 3 point does not work right.
Having worked for a hydraulics manufacturer for 38 years (25 in the engineering dept.) I can tell you that if hydraulic components are not "matched" properly, they can cause a lot of headaches... in this case the PFDV is the one that will cause problems. Within a designed range of flow, it will "tap off" a set flow to the "priority"port and the remainder to the "secondary"... notice this is "within a designed range"... not "no matter how much flow you put through it". There are companies that make adjustable PFDVs, but these are not generally used in power steering systems, as there are too many people that would "play" with them that do not know what they are doing.
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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