I put a tee in the line to the ram and connected one leg of it to the return through a needle valve. When I crack the valve it bleeds off some of the fluid to the ram and slows it down. Simple and done with what I had on hand.
Thank you BrianPeterson, TugboatEng, and hydtools for your...
In digging deeper I found a diagram of the control valve unit (it's 60 years old) and learned that it incorporates a relief valve, so I suspect it opens at a higher pressure than the motor (not original) can produce. Would an alternative be to run a line from the control valve outlet to the...
Thank you both. My first thought was to slow the pump, which I did via a double reduction of belts and pulleys, but it then didn't pump at all. Now I know that pumps have a minimum speed! Relief valve sounds like the way to go. It's for intermittent use so efficiency and heating aren't...
Hi all,
New guy seeking advice. I have a small Gresen pump out of a bearing press running a 3" x 12" ram and I understood I could slow the ram speed by plumbing in a valve after the pump to modulate oil flow. It doesn't change the speed until just before I close it and then it stops the pump...
