Welcome HEF.
Next time, please post in detail about your machine, including the SK550DLC dash xx and serial number, or take some pictures.
There is a practical experience that if you complete all three steps (A, B, and C) but still cannot solve the problem, then you should press stop immediately after completing the "A" adjustment.
You also need to remove the 2 PSVs of the pump to check and clean them carefully.
