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shankeroid(at)verizon.net
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 Posted: Sat Apr 19, 2014 7:21 am Post subject: Hissing Pop-Off Valve |
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When servicing the air system on our stock CJ, the pop-off valve begins “hissing” at around 32 ATM and “pops-off” at around 38 ATM (not allowing system to be pressurized any higher.) After popping off and servicing discontinued, hissing will continue (slowly diminishing) until pressure settles at around 32 ATM. Although probably plenty for a few start attempts, I want to fix the problem and have the full 50 ATM available.
I know the valve is adjustable, but is the hissing a separate problem that needs to be addressed? Also, what specifically is causing the valve to hiss?
Thanks.
Jim Shanks
shankeroid(at)verizon.net (shankeroid(at)verizon.net)
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jackpot
Joined: 13 Jul 2010
Posts: 65
Location: Las Vegas, Nevada
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| Posted: Sat Apr 19, 2014 10:25 am Post subject: Hissing Pop-Off Valve |
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Jim. The pop off valve has a rubber seat inside of it. It gets old and hard, yours probably needs to be replaced. Very easy to do. I just did mine. Got parts from Doug Sapp. Last week. He will be out of country for about another week. You might try adjusting the valve in a bit and retry the servicing. It may help. Don't turn it in to far on the attempt. Just maybe a half turn and see what the pressure does. If it helps a bit then try a little more. Gary. LAS. CJ. N22YK
Sent from my iPhone
On Apr 19, 2014, at 8:21, "Jim Shanks" <shankeroid(at)verizon.net (shankeroid(at)verizon.net)> wrote:
[quote]
When servicing the air system on our stock CJ, the pop-off valve begins “hissing” at around 32 ATM and “pops-off” at around 38 ATM (not allowing system to be pressurized any higher.) After popping off and servicing discontinued, hissing will continue (slowly diminishing) until pressure settles at around 32 ATM. Although probably plenty for a few start attempts, I want to fix the problem and have the full 50 ATM available.
I know the valve is adjustable, but is the hissing a separate problem that needs to be addressed? Also, what specifically is causing the valve to hiss?
Thanks.
Jim Shanks
shankeroid(at)verizon.net (shankeroid(at)verizon.net)
| Quote: |
D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
ist"">http://www.matronics.com/Navigator?Yak-List
D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
//forums.matronics.com
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ot;">http://www.matronics.com/contribution
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yakplt(at)yahoo.com
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| Posted: Sat Apr 19, 2014 12:27 pm Post subject: Hissing Pop-Off Valve |
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The hiss is just air escaping by the seal. It is normal for it to do this. The seal will leak before it pops fully off, unless brand new, and even then some do. Ignore the hiss. Adjust carefully as Gary mentioned. I would go NO MORE than 1/4 turn at a time, probably not even that. It doesn't take much, believe me.
Mark
From: Gary Gabbard <ggg6(at)att.net>
To: "yak-list(at)matronics.com" <yak-list(at)matronics.com>
Sent: Saturday, April 19, 2014 2:19 PM
Subject: Re: Hissing Pop-Off Valve
Jim. The pop off valve has a rubber seat inside of it. It gets old and hard, yours probably needs to be replaced. Very easy to do. I just did mine. Got parts from Doug Sapp. Last week. He will be out of country for about another week. You might try adjusting the valve in a bit and retry the servicing. It may help. Don't turn it in to far on the attempt. Just maybe a half turn and see what the pressure does. If it helps a bit then try a little more. Gary. LAS. CJ. N22YK
Sent from my iPhone
On Apr 19, 2014, at 8:21, "Jim Shanks" <shankeroid(at)verizon.net (shankeroid(at)verizon.net)> wrote:
[quote]
When servicing the air system on our stock CJ, the pop-off valve begins “hissing” at around 32 ATM and “pops-off” at around 38 ATM (not allowing system to be pressurized any higher.) After popping off and servicing discontinued, hissing will continue (slowly diminishing) until pressure settles at around 32 ATM. Although probably plenty for a few start attempts, I want to fix the problem and have the full 50 ATM available.
I know the valve is adjustable, but is the hissing a separate problem that needs to be addressed? Also, what specifically is causing the valve to hiss?
Thanks.
Jim Shanks
shankeroid(at)verizon.net (shankeroid(at)verizon.net)
| Quote: |
D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
ist"">http://www.matronics.com/Navigator?Yak-List
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//forums.matronics.com
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ot;">http://www.matronics.com/contribution
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dsavarese0812(at)bellsout
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| Posted: Sat Apr 19, 2014 5:28 pm Post subject: Hissing Pop-Off Valve |
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The pop off (pressure RELIEF) valve is controlled by spring tension. The tighter you make the "top hat" (turn it clockwise), the higher the pressure goes. When the pressure reaches the preset spring pressure, the valve opens. The hiss is the pressure relief which stops when the pop off valve closes. This is perfectly normal. It's just like the pressure relief valve on a shop compressor. If the pressure in the compressor exceeds the pressure relief valve preset pressure, the valve opens and "dumps" the excess pressure.
Dennis
From: Jim Shanks <shankeroid(at)verizon.net>
To: yak-list(at)matronics.com
Sent: Saturday, April 19, 2014 10:21 AM
Subject: Hissing Pop-Off Valve
When servicing the air system on our stock CJ, the pop-off valve begins “hissing” at around 32 ATM and “pops-off” at around 38 ATM (not allowing system to be pressurized any higher.) After popping off and servicing discontinued, hissing will continue (slowly diminishing) until pressure settles at around 32 ATM. Although probably plenty for a few start attempts, I want to fix the problem and have the full 50 ATM available.
I know the valve is adjustable, but is the hissing a separate problem that needs to be addressed? Also, what specifically is causing the valve to hiss?
Thanks.
Jim Shanks
shankeroid(at)verizon.net (shankeroid(at)verizon.net)
[quote]http://ww"nofollow" target="_blank" href="http://forums.matronics.com/">http://f==========
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