thanks for the reply,-the valve you sent is similar - from D thru 050 is different - mine has a rectangle part that bolts where D bolts on --I took this one off to clean the balls and springs, thinking it was made like the one pictured, found that I cannot seem to get the balls in correctly- as I have lost all detent action.
thinking I, may have to make (buy) the special socket (round with two flat sides) soas to pull the shafe (E) in your schematic to get the balls installed right