Ed Cooley

I have to get a pulley for my Dankoff motor to run with my Deming piston pump. The pump pulley is about 14 inches. My motor runs at 1800 rpm max. What speed should the pump pulley be run?  My response from Dankoff was that they run their piston pumps with a 5 to 1 pulley ratio.

I am going through a Deming piston pump that hasn't been used for about 50 years. I've owned it all that time and never had a use for it. Now I have an unused Dankoff DC motor and PV to run it and want to try to get it pumping. I have found the leather cups at an Amish on-line store called Lehman's. The last thing I am concerned about is the packing nut side of the pump that is gasketed. I can't figure out how it is held together. It seems like when you remove the pump from the frame that piece should come loose, but after tapping it, it doesn't come apart. Either it's really stuck, or there is something I don't see holding it together. I can feel that there is a thick gasket (it might be leather too) in there behind the packing nut housing. My plan now is to put it together and see if it leaks.

Hi Jeremy,
I tried to contact you using your email address and my email was undeliverable.  Here's what my email said...

I'm in SW Oregon near the Umpqua River.  We have several small un-named streams that fall 200 feet or more on our land.   I don't have a good feeling about the flowrate, but I would guess that it is 10 to 100 gpm range depending on recent rainfall.  This system would augment solar during the winter months when we don't have much sun exposure.  The summer flows are probably too low when our solar exposure increases and could take up the slack.