Here’s what I suggest. 1. Connect a 50psi gauge to the port I marked above. Start the engine and let it idle. If you have absolutely zero pressure on that gauge go to the next step. If you have any pressure at all, revert back here for further suggestions. 2. If there is absolutely zero pressure then remove the quick coupler from the same test point and start the engine at idle. Do you get any oil at all out of it.? It goes without saying that you need to do this step VERY CAREFULLY. Oil under pressure could seriously injure somebody.