I adjusted both large and small springs on my pump switch trying to obtain cut out at 60 psig and cut in at 40 psig. Apparently, I have a pressure differential of 30 psig. It cuts in at 30 and cuts out at...
The large spring is for the cut in and cut off pressure, the smaller spring is for the differential in pressure, meaning it adjusts the lbs of pressure between cut in and cut off. Since you have adjusted the smaller spring you have a 30 psi differential instead of 20. To adjust turn the small spring counter clockwise 1 full turn or 360 degrees, then recheck the pressure differential (do not adjust the taller spring while doing this) You may have to repeat this two or three times. Once you have a 20 lb differential, then you can adjust the taller spring to get your cut in, cut out pressure. It works the same way. Clockwise for a higher pressure and counter clockwise for lower pressure. It's something you'll have to play with. It doesn't have to be exact, as long as it's close. Sometimes they are hard to get readjusted.
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