O-Rings
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6319
- Posts: 38
- Joined: Sat Aug 18, 2018 12:17 am
- Name: Stephen E
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O-Rings
I have a Cessna 120 Wing Tank fuel drain with a 1/4 NPT valve which needs a new o ring. Replacement ring seems to be an MS29513-006. Aircraft Spruce catalogue says MS29513 is not compatible with Auto Fuel. Does anyone have any experience with this?
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8401
- Posts: 17
- Joined: Fri Feb 15, 2019 9:42 pm
- Name: Matt F
- Location: 4865 n anchor ave. boise ID 83703
- Aircraft Type: c140a
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Re: O-Rings
I changed the whole drain. they are about $16 each. If you are fast you can change them with out draining the tanks. I lost maybe a cup or two of fuel.
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6643
- Posts: 2544
- Joined: Tue May 01, 2018 7:00 am
- Name: John C
- Location: KLCI, NH
- Aircraft Type: 1946 C140/C90
- Occupation-Interests: A&P, semi-retired
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Re: O-Rings
MS29513 should be OK as long as there is no alcohol in the fuel.
If the drain valve is a Curtis valve, it is not rebuildable. The seal is not an o-ring; it is a flat washer, and the valve is known not to last through the second seal. When it fails all the fuel comes out.
If the drain valve is a Curtis valve, it is not rebuildable. The seal is not an o-ring; it is a flat washer, and the valve is known not to last through the second seal. When it fails all the fuel comes out.
- Curtis drain failure.jpg (58.04 KiB) Viewed 2349 times
John Cooper
www.skyportservices.net
www.skyportservices.net