There's an item in the delivery valve that goes in two ways. The W126 CD manual isn't clear on wheter the groove should be on top or below. The manual shows the groove in the middle. I forget which is the right way. I had 4 one way and 2 the other when first opened. I put each one back the way it was because I didn't know there was an orientation to consider, plus I opened the delivery valves one at a time and had no reference. Then I read the archives...

Sixto
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