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Curtis drain valves

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lindbergh(at)cfl.rr.com
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Posted: Sat Oct 14, 2006 5:57 am Post subject: Curtis drain valves

>>>I  checked the tanks in my G-35, the bladders were manufacturered in September  1955. Wish me luck.

  

 Think positive: Perhaps they've been OH'ed since  1955 and are in better shape than you might expect.

  

 I've read here  that some owners warm the area around the nipple in an effort to soften it. I've  never tried that technique (hot water? heat gun? acetylene torch?) I have  replaced several valves on my H35 with fuel in the tank. No problem at all.  YRMV, of course.

  

 The special Curtis O-rings (I don't think  they have a circular cross section but are flat on one side) are reportedly  available to buyers who know the secret code. I don't know what it might  be.

  

 Apparently there have been incidents where a  brass portion of the an old valve failed, resulting in the tank draining  dry without the pilot's knowledge. Because a new Curtis valve costs about $15,  it may make more sense to splurge and replace a leaking valve with a complete  new assy.

  

 (Prediction: The  next post will extoll the virtues of Eagle drain valves.)

  

 -- Mike Truffer

  

  

 



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rob87b(at)earthlink.net
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Posted: Sat Oct 14, 2006 6:26 am Post subject: Curtis drain valves

I also heard they are special seals in the valves so I just bought four new curtis drain valves complete.   They are about $11/each, not bad.   I have installed them in the two Aux tanks that took a couple of hours.   The mains are going to be tougher.   On the F model there is no way you can reach the drain hole from the filler neck to block the hole or even hold it down while you change the valve.     Maybe if you remove the cover plate from the wing and take out the filler neck you might get your hand in there but it would be reach.    I going to try and do it complete from under the wing.



rob.



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rob87b(at)earthlink.net
Guest

Posted: Sat Oct 14, 2006 2:17 pm Post subject: Curtis drain valves

Just finished changing the two main tank curtis valves.   Was real easy.  It took about an hour including draining the tanks and replacing the valves.   All was done from under the wing with a small box end wrench to loosen the hose clamp.   The nipple stayed in place to pull the old one out and push in the new one.



thanks for all the help.



rob.



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