After I put the oil in I couldn't pump it out so I had to disassemble it to find the problem. Three different sizes of metric wrenches and lots of oilcloths later. It turned out to be a stuck ball bearing in the smaller of the two valves. By pushing it up and down and adding oil there, this valve worked. By then I had lost the other valve spring and ball so a few weeks of necessary shop cleaning followed. I finally found them at the bottom of the oil pan. Now that it works I can say I like the action of the thumb pump which is what I was looking for from the start. It just took time to reach that goal. It now works as expected, but I only downgraded it because of the time and mess it took me to get it working. I like the design.
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