I have a SPECTRUM 375. It has always been hard to adjust the air pressure.

Today the torch would not fire. The pressure was (I thought) right at 60psi.

I could not get knob to move....even with channel locks!

I took the cover off.....figured I take apart the regulator apart....how much damage could I do. I'm a tech.....and it ain't working now.

So I get the plastic nut holding the regulator on removed. I push the adjust knob through the face. I tilt the regulator up. It's then that I notice the inscription on the face of the knob.



"PUSH TO LOCK"


I am retired now, but when I was working I would have expected my compadres to be laughing at me, not with me!