Senco 1GAL tank fills fine but releases right away when it shuts off
Senco PC1010 air compressor
Senco Air Compressor
SCFM Output: 1.4 CFM
Tank Size: 1 GAL
Max Output: 125 PSI
VOLTS & AMPS: 115V 4A
Manufactured Date: August 2010
Usage: 0-5 times a month, light duty 16-23 gauge nails
I'm assuming it's some kind of safety mechanism below the on/off switch that gets triggered when the tank reaches capacity while on. If I pull the plug when it reaches capacity it will hold the air but if I leave it plugged in and the switch in the on position it will release the air only to then turn back on a continuous cycle of filling the tank and releasing, filling, releasing, so on as so forth.
The 'safety mechanism' I mentioned earlier is triggers as soon as I turn the power switch to the off position regardless if the machine is plugged in or not or if the tank contains any pressure or not.
There is a spring attached to the leaver of this 'safety mechanism' that I can see pulling the leaver forward to depress the air release pin. I wondered if I had a broken component inside that was allowing the leaver to slip but nothing jus mode out to me as worn or broken.
Any ideas of what's happening and how to fix it?