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jonboede(at)hotmail.com
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 Posted: Mon Feb 13, 2017 12:11 pm Post subject: one way air valves (emergency system) |
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My emergency air system on a stock CJ goes up and down with the main air pressure.
This is a recent development. So I changed out all the one-way air valves on the firewall and that didn't stop it.
Is there a one-way valve for the emergency air system, not forward on the firewall, that I missed?
Or is there another reason the emergency air system would bleed down? The emergency air valve hadn't been touched at any time around when this started happening.
Jon
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Ernie
Joined: 11 Jan 2006
Posts: 513
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| Posted: Mon Feb 13, 2017 12:23 pm Post subject: one way air valves (emergency system) |
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Did you replace, or overhaul the check valves? You may be leaking past your Emergency valve, but that would prevent your gear from going up. Theres only 2 ways in and out of the emergency bottle, through the Valve and through the air inlet from the check valve. The check valve that prevents the bottle from leaking out via the inlet is on the starboard side of the firewall. Its the top one in the TEE configuration. Spray some soapy water on the check valve, If you overhauled it, then the lead washer may have not seated correctly. It happens to me all the time.
Ernie
On Mon, Feb 13, 2017 at 3:06 PM, Jon Boede <jonboede(at)hotmail.com (jonboede(at)hotmail.com)> wrote:
| Quote: |
My emergency air system on a stock CJ goes up and down with the main air pressure.Â
This is a recent development. So I changed out all the one-way air valves on the firewall and that didn't stop it.
Is there a one-way valve for the emergency air system, not forward on the firewall, that I missed?
Or is there another reason the emergency air system would bleed down? The emergency air valve hadn't been touched at any time around when this started happening.
Jon
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Ernie
Joined: 11 Jan 2006
Posts: 513
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| Posted: Mon Feb 13, 2017 12:24 pm Post subject: one way air valves (emergency system) |
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One other place you may be leaking is the Emergency Air gauge itself.
Ernie
On Mon, Feb 13, 2017 at 3:23 PM, Ernest Martinez <erniel29(at)gmail.com (erniel29(at)gmail.com)> wrote:
| Quote: | Did you replace, or overhaul the check valves? You may be leaking past your Emergency valve, but that would prevent your gear from going up. Theres only 2 ways in and out of the emergency bottle, through the Valve and through the air inlet from the check valve. The check valve that prevents the bottle from leaking out via the inlet is on the starboard side of the firewall. Its the top one in the TEE configuration. Spray some soapy water on the check valve, If you overhauled it, then the lead washer may have not seated correctly. It happens to me all the time.
Ernie
On Mon, Feb 13, 2017 at 3:06 PM, Jon Boede <jonboede(at)hotmail.com (jonboede(at)hotmail.com)> wrote:
| Quote: |
My emergency air system on a stock CJ goes up and down with the main air pressure.Â
This is a recent development. So I changed out all the one-way air valves on the firewall and that didn't stop it.
Is there a one-way valve for the emergency air system, not forward on the firewall, that I missed?
Or is there another reason the emergency air system would bleed down? The emergency air valve hadn't been touched at any time around when this started happening.
Jon
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Clouddog
Joined: 02 Jun 2016
Posts: 121
Location: Lebanon, TN
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| Posted: Tue Feb 14, 2017 5:21 am Post subject: one way air valves (emergency system) |
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Morning Jon. Don't feel bad I am having same issue. One other time, I had this happen it WAS the emergency check valve as Ernie describes on the starboard firewall. My emmergency air would then hold forever and then for no apparent reason it would bleed to 30 atms in the first 24 hours and 24 hours later be at 0. I rebuilt  the emmergency valve again but no change. I was told the other day to also check my gages so today I'm pulling the right panels and putting the leak check at the gages. I'll let you know if I find anything. Last week I rebuilt and/or replaced all 6 check valves on the firewall, all gear locks, 8 diverted valves, compressor banjo fitting, air drier and over pressure regulator. What an eye opener!Â
On Feb 13, 2017 14:18, "Jon Boede" <jonboede(at)hotmail.com (jonboede(at)hotmail.com)> wrote: | Quote: |
My emergency air system on a stock CJ goes up and down with the main air pressure.Â
This is a recent development. So I changed out all the one-way air valves on the firewall and that didn't stop it.
Is there a one-way valve for the emergency air system, not forward on the firewall, that I missed?
Or is there another reason the emergency air system would bleed down? The emergency air valve hadn't been touched at any time around when this started happening.
Jon
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