![]() ATF is a good choice if there isn't a spec on the data plate. Hopefully the pump has a data plate and we can skip all the testing.Ĭhange the fluid anyway. If you have to test, that'll give you some numbers to work with. Unhindered means it's not pushing against anything but the hyd fluid and friction. For example 10 seconds to fill a gallon container represents approx 6 GPM. You'll have a good estimate of the pump's unhindred GPM. Don't run the pump dry, it's not good for them but won't damage it if you don't let it run dry long.Īnyway, let it pump itself out into a measured container and time it. (General Principals) Now if you were to disconnect an output hose and let it pump till it gurgles. I highly recommend you change hydraulic fluid on GP. ![]() I'm just looking at the rod's effect on working force. rod represents 1.77sq/in (yes I rounded) and at 500 psi, it represents about 883.5 lbs of working force between pull and push. Okay, I pulled out my calculator, my calc. You don't need to know what the piston area is to judge the difference in working force. rod from a piston area to get an idea of the difference in working force between push and pull. Subtract the area represented by a 1-1/2" dia. I just grabbed those numbers out of the air for the purposes of discussion. At 500 psi that'd reduce the working force by 375 lbs. That's another 3/4 sq/in subtracted from the ram area. This is going to be a fun project and a workhorse tool when you get done with it. I can't tell you how happy I am I don't live close enough to browse the HGR warehouse. It's making me itch to plug it in, listen, measure and time things before I start cutting and welding. Yes? Also, smaller dies mean greater psi applied to the work and psi is what moves the steel. If the ram just stops when you release the lever you can preposition the dies close to the thickness of the work so travel speed isn't as important. Is the control valve detent Stop or detent centering (automatic return)? There are tricks for speeding up the GPM without effecting the psi. 1-1/4" solid steel table would cost more than you have into it all by itself. The 1.5 HP Baldor motor is a workhorse and makes it a good buy all by itself, single phase is the deal maker in my book. ![]() The larger rig was driven by a 453 Detroit Diesel (unaffectionately known as a SCREAMIN Jimmy.) coffee can but made a lot of GPM and PSI. The hydraulic pumps on our drill rigs were smaller than a 3 lb. That's a small pump but physical size doesn't indicate a lot about it's output. Yes? It's displacement will make it pull faster but will reduce working force. By 1-1/4" ram, that's the diameter of the rod coming out of the piston. ![]()
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