First off, yes, it was a black iron pipe cap and I was aware of its pressure rating and the potential of failure.
Secondly, the engine WAS hard to pull and would not start. Just like when you have the control valve engaged. Too much strain on the engine and it won't start.
Third, I just wanted to turn the pump over and see what pressure the pump would develop. Like was presented in the video. Still not sure if that's a good way to tell if you have a bad pump or not.
Fourth, I did previously have the gauge installed as you suggested and it only read 200 psi when the control valve was engaged and the piston was maxed out (or held in the retracted position). Someone here said that would not be an indicator of a bad pump (iirc).
View attachment 1174584
Fifth, the engine does bog down a little when the piston hits resistance, but no more than when the splitter was working properly. So, I don't think it's a tired worn out engine.
That's were I left it and got side tracked. I need to figure if it is the pump and get one ordered if it is. The wood is going to be piling up soon.
Oh, correction. one other thing that was suggested, was to shim the adjustment screw (since I had previously maxed it out without any positive results). I'll try that next.