What your calling the trap door #27 in my manual is this also called the listening door? One more dumb question, it sounds like you are talking about three different seals. I’m looking at my Manuel and thinking of just the two# 13&14 oil seal and the quad seal and does the trap door have to be removed to access the quad seal .Sorry about all the questions but I’m stuck out in the boonies and pretty much have to do most repairs myself, with the expert advice I get here on Tapatalk
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