KingCJ6(at)aol.com
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 Posted: Tue Oct 28, 2014 6:06 am Post subject: Fwd: loss of main air |
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Before any of this process, I'd suggest you first check the spring that keeps the valve closed. I've seen this come loose, or not have enough tension on several CJ's, which causes exactly this problem.
Dave King
[quote] From: mark.bitterlich(at)navy.mil
Reply-to: yak-list(at)matronics.com
To: yak-list(at)matronics.com
Sent: 10/28/2014 6:18:11 A.M. Pacific Daylight Time
Subj: RE: loss of main air
--> Yak-List message posted by: "Bitterlich, Mark G CIV NAVAIR, WD" <mark.bitterlich(at)navy.mil>
If you happen to have a source of compressed air (no more than 750 PSI, but even less will work, and the correct adapter fittings, do this:
Disconnect any fitting downstream of the snot valve, .... even at the snot valve itself is OK... on the downstream side.
Connect the air to blow BACKWARDS through the snot valve to the engine air compressor.
After you apply pressure, listen for leaks and use whatever method you have on hand to find them. This will find most leaks, including at the Banjo fitting, without having to take the whole mess apart. Remember that if you take the whole Banjo fitting apart, you are going to need new aluminum crush washers. If you fail to replace them, you are just asking for more leaks. Trust me on this one. You can tighten them up and POSSIBLY get them to seal again, but just not a wise move.
I've done the above to find leaks in this section more than once on Yaks and Sukes, but never on a CJ. Never worked on a CJ sorry to say.
If you can't find any leaks, and you cannot get the thing to pressurize, then you probably have the one way poppet valve in the Banjo itself that is not seating, and air is going back into the compressor itself. Again all the previous advice from everyone else is correct, take it apart and clean it thoroughly.
Mark
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