Originally Posted by CL&T
Mysterious indeed. Is this an ATV type sprayer? Sounds like you have several problems. With the boom valve closed I can't see how the middle nozzle is still getting pressure while the others aren't. Aren't they all connected together off a header? I would expect the new pressure switch to cut off at 60PSI unless something is clogged where it is connected.
It is an ATV type sprayer. There are three nozzles, all three leak a little bit but the middle one is the strongest, it's the closest to where they all connect.
I've taken the pump apart. There is a little bit of residue from the Stonewall but nothing major.
The sprayer still works fine I just have to flip the power switch on/off when operating it instead of opening and closing the boom valve.