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fuel drain valve replacement

I had a question from an A&P regarding replacing a fuel drain valve on an A36. The concern was how not to damage the rubber nipple that the drain valve is inserted into and retained with a hose clamp. I suggested removing the hose clamp and using hot compresses (hot water soaked rags) to make the nipple more supple then attempting to remove it. Any other suggestions would be appreciated.
Thanks in advance.
Bill Mercure

Model: Bonanza A36
Posted 5/31/2023 - 1 year ago
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The drains are easily replaced with the tank full. Have new valve on hand p/n CCA3400. Loosen clamp several turns until gap is visible around nipple under clamp. Put a small amount of Fuel Lube or a couple drops of oil on new valve. Have a bucket under tank and pull old valve by pulling down and twisting while pulling. Put your hand over to stop fuel and immediately push new valve at an angle while twisting at the same time, valve should slide in easily. If tank is not full the bladder may push upwards and not allow valve to push into nipple.
The other option is to drain tank and then remove inboard plate on upper wing surface to be able to reach into tank to hold it down while is new valve is inserted. Be sure you replace gasket on tank access plate.

Bob Ripley
ABS Technical Advisor

Posted 5/31/2023 - 1 year ago
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Thanks again Bob. I'll relay your answer to the guy. Hope all is well with you.
Bill

Posted 5/31/2023 - 1 year ago
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fuel drain valve replacement