Sounds like the old Gresen Vane pump. What size pulleys are you using in other words at what RPM do you intend to run the engine when using the pump? What is the casting number on the valve? Most of those model 300 or 400 valves or the older ones they replaced had several options on springs and pressure settings. What do you intend to run with the pump? Remember rule of thumb is it takes 1 horsepower for each one gallon of pump output at a pressure of 1500 PSI. I will need to get my old Gresen books out to see but there were different sizes of those model pumps. Confused? J.
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Today's Featured Article - An Old-Time Tractor Demonstration - by Kim Pratt. Sam was born in rural Kansas in 1926. His dad was a hard-working farmer and the children worked hard everyday to help ends meet. In the rural area he grew up in, the highlight of the week was Saturday when many people took a break from their work to go to town. It was on one such Saturday in the early 1940's when Sam was 16 years old that he ended up in Dennison, Kansas to watch a demonstration of a new tractor being put on by a local dealer. It was an Allis-Chalmers tractor dealership,
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