Re: Pump O ring - Saab 900 Bulletin Board - Saabnet.com


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Re: Pump O ring
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Posted by ThomasJ [Email] (#780) [Profile/Gallery] (more from ThomasJ) on Fri, 16 Oct 2020 05:33:41 Share Post by Email
In Reply to: Pump O ring, phil94028, Thu, 15 Oct 2020 17:19:42
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Phil, What I did was fold-up and wrap a paper towel around each pump fitting. I held them on with wire ties. then I folded and neatly fitted them around the part of the tank where it disappears under the deck at the pump opening. Then went for a sloshing drive after which I carefully removed the towels one at a time scrutinizing each and was glad that NONE of them had even a hint of fuel but there was fuel on the lid...alas..a sloshing leak.
This is a good tome to remover the pump and refit the ring to ensure that it will completely screw into the opening. This is where you can examine and clean stuff as needed. Then reinstall the pump without grease on the O-ring. If that o-ring gets wet with fuel you will have to find a way to dry it out because it will swell and be a !@#$ to work with and may even make it worse. I purchased an extra and was glad I did.
The pump assy fits absolutely too tight. If I ever have it out again I will gently trim a bit so it will drop in without grabbing every thread on the way in.
Keeping it from turning: Lubed the Nut and the threads (NOT the O-ring) after cleaning them with a small brush and soap. Then CAREFULLY placed a long (10")1/4" straight-slot screwdriver so that it acted a a prybar between the 2 pump ports...I stress..be gentle, only hold it long enough for the pump to stop on its own..this is where I do not agree on lube on the pump o ring...the grease only helps the pump to slide. Grease on the port o-rings ...yes, they slide into the ports but the pump is not supposed to slide.
This take 3 hands so ingenuity, or grow a third hand, or borrow one.

->Posting last edited on Fri, 16 Oct 2020 05:39:07.
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