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From what I was able to read from that service bulletin it included a self tapping screw a sealing ring to under the screw head and a O ring.
Do you have a mighty vac the little hand vacuum pump. I was thinking that you could test your oil passages to the tank by trying to pump some up through the inlet hole. The lower of the two hoses is the pick up hose. It has been my experience with those hoses get brittle and can't be removed without destroying them but you could see if that passage is obstructed. If you have the lower hose off you could rig up a hose to a tank of oil and see if you could get it to pull oil through the hose. I had problems with my fueling pump during installation and cut the thin one that seals the pump to plate. Luckily it came with a spare.
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