So my cousin moved in with us for the year and along with him he brought his Sheridan, that he says he had never used. The internals were a mess of paint and old oil (he probably got the gun used) so i cleaned out everything except for the valve as I could not find the right size allen key to unscrew the little retaining bolt, but eventually i found it, took out the valve, cleaned it, put it the gun back together and when I tested it, it sounded like a rental running out of air.
Now I knew it my tank wasn't running low as it was recently filled, and so i figured I must have put the valve in wrong, so I took it out and upon closer inspection it appeared to have no specific way to go in, so it but everything back together and when I tested it again I had the same problem. So if anyone had this problem way back when these guns were in production and can offer some advice or if anyone knows some kind of solution that well appreciated. Thanks