| Air Suspension Tank [message #75528] |
Wed, 03 March 2010 12:02  |
captjack
Messages: 271
Registered: February 2010
Location: Sebastopol, California
Karma: 1
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Senior Member |
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I'm reworking my leaky system and found a couple of leaks in fittings and fixtures attached to the tank. One is what appears to be an overpressure release. Looking at compressor specs (max +/- 200 lbs, I'm wondering if this is really needed. Comments?
Thanks,
Jack Christensen - K6ROW,
'76 Glenbrook/Clasco - "The Silver Bullet",
Sebastopol, CA
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| Re: Air Suspension Tank [message #75534 is a reply to message #75528] |
Wed, 03 March 2010 13:08  |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Senior Member |
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| captjack wrote on Wed, 03 March 2010 13:02 |
I'm reworking my leaky system and found a couple of leaks in fittings and fixtures attached to the tank. One is what appears to be an overpressure release. Looking at compressor specs (max +/- 200 lbs, I'm wondering if this is really needed. Comments?
Thanks,
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Sir: YES.. They are available at most parts houses. $6-8
http://www.mcmaster.com/#pressure-relief-valves/=625sbt
If the pressure regulator rusts up and sticks it could explode the (rusty internal) tank under your feet if a 75-8 or under Her feet if a 73-4. I have never heard of this happening, but it could.
C. Boyd
76 Crestmont
East Tennessee
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| Re: Air Suspension Tank [message #75547 is a reply to message #75544] |
Wed, 03 March 2010 16:06 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Senior Member |
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| gmchunter wrote on Wed, 03 March 2010 16:26 |
Boyd, which one of the pressure relief valves from McMaster Carr should we use?
Michael
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Sir: I had to do some research on the size. Seems they can either be 1/8 or 1/4 depending on which tank you have. I believe most are 1/4.
The multi range one with the interchangable spring would be my choice.
50265K23 $4.12
C. Boyd
76 Crestmont
East Tennessee
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| Re: [GMCnet] Air Suspension Tank [message #75552 is a reply to message #75547] |
Wed, 03 March 2010 16:19 |
Dennis S
Messages: 3046
Registered: November 2005
Karma: 2
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Senior Member |
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If you are referring to the emergency high pressure relief I would
suggest 150 psi as the air compressor cut off is probably 120-135.
Dennis Sexton
73 GMC
Sent from my iPhone
On Mar 3, 2010, at 4:06 PM, Charles Boyd <covered-wagon@comcast.net>
wrote:
>
>
> gmchunter wrote on Wed, 03 March 2010 16:26
>> Boyd, which one of the pressure relief valves from McMaster Carr
>> should we use?
>>
>> Michael
>
>
>
>
>
> Sir: I had to do some research on the size. Seems they can either
> be 1/8 or 1/4 depending on which tank you have. I believe most are
> 1/4.
>
> The multi range one with the interchangable spring would be my choice.
> 50265K23 $4.12
>
>
>
>
> --
> C. Boyd
> 76 Crestmont by Midas
> East Tennessee
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
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GMCnet mailing list
List Information and Subscription Options:
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Dennis S
73 Painted Desert 230
Memphis TN Metro
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| Re: Air Suspension Tank [message #75570 is a reply to message #75567] |
Wed, 03 March 2010 19:19 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Senior Member |
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| gmchunter wrote on Wed, 03 March 2010 19:42 |
Thanks Boyd! That pressure relief valve comes with different springs and includes four color-coded springs calibrated to different pressure ranges: yellow for 25-50 psi,
red for 51-100 psi,
silver for 101-150 psi,
and blue for 151-200 psi.
Change the spring to change the pressure range.
Which spring, silver or blue would you recommend?
Michael
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I would use the blue. I would figure +- 10% and I have mine set to 125+12.5=137.5 max working pressure. I would want the safety pop of to be set 150-200. Also a water drain needs to be at the lowest point. I can`t find a link, but the type used on all bigtruck and busses has a cable ran from it and can be drained by pulling the cable from under the front hood when you check your oil. It will screw in the tank end where the plug is now. Moisture is your worst enemy inside your air systen.
C. Boyd
76 Crestmont
East Tennessee
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| Re: Air Suspension Tank [message #75572 is a reply to message #75570] |
Wed, 03 March 2010 19:33 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Senior Member |
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| C Boyd wrote on Wed, 03 March 2010 20:19 |
| gmchunter wrote on Wed, 03 March 2010 19:42 |
Thanks Boyd! That pressure relief valve comes with different springs and includes four color-coded springs calibrated to different pressure ranges: yellow for 25-50 psi,
red for 51-100 psi,
silver for 101-150 psi,
and blue for 151-200 psi.
Change the spring to change the pressure range.
Which spring, silver or blue would you recommend?
Michael
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I would use the blue. I would figure +- 10% and I have mine set to 125+12.5=137.5 max working pressure. I would want the safety pop of to be set 150-200. Also a water drain needs to be at the lowest point. I can`t find a link, but the type used on all bigtruck and busses has a cable ran from it and can be drained by pulling the cable from under the front hood when you check your oil. It will screw in the tank end where the plug is now. Moisture is your worst enemy inside your air systen.
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Here is what the drains look like. NAPA has them, but I can`t find it in their on line.
http://www.ryderfleetproducts.com/cgi-bin/ryderfp/products/srm/oid/51681/pn/Air-Tank-Drain-Valve-60-Pull-Type/erm/product_detail.jsp
C. Boyd
76 Crestmont
East Tennessee
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| Re: Air Suspension Tank [message #75578 is a reply to message #75573] |
Wed, 03 March 2010 20:25 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Senior Member |
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| Jim Galbavy wrote on Wed, 03 March 2010 20:53 |
Chuck, I had to replace my air tank drain when I was down in Orlando a few years ago. It's a brass valve that I got from JimB. I use it at the end of each day's trip.
for the emergency relief valve, it would depend on which air bag system you are using. My Leigh Harrison bags will go up to 140psi when extended all of the way up in the RAISE position. jimK's uses less working pressure.
Chuck, at Bean Station (if I can make it) would you help me with a thermosat controled valve that throttles down the hot engine coolant to my water heater? I'll have to set the valve in the coolant hose, and run vacumm hose and electrical line for the controls. I have everything. ....just not sure where the easiest places are to hook everything up.
jim galbavy
'73 X-CL (ANNIE)
Chesterfield, Va
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Jim: I would think the 150-200 would still allow 145 working pressure. Since the spring is made to interchande, if I were having an issue I would think I should be able to shim the spring with small stainless washers? to get 175 if needed. I would think this would put stress on the electric compressor. My big trucks run 135, but I can`t jack up the air bags either. I like the ball drain valves also, just have to crawl under it.
We Should be able to do the thermostat without pit time. We might need new hoses if we need to mount it as to the lower rear firewall? If you do get hoses, If you can get the blue silicone hose from big truck parts store. It is $$ but tough and lasts a very long time. Stainless clamps also please. You might Ask Mr Dotson about a bad water heater hose. Not a pretty story. Looking forward to working with you again..
C. Boyd
76 Crestmont
East Tennessee
[Updated on: Wed, 03 March 2010 20:26] Report message to a moderator |
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| Re: Air Suspension Tank [message #75583 is a reply to message #75570] |
Wed, 03 March 2010 21:31 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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| C Boyd wrote on Wed, 03 March 2010 19:19 |
| gmchunter wrote on Wed, 03 March 2010 19:42 |
Thanks Boyd! That pressure relief valve comes with different springs and includes four color-coded springs calibrated to different pressure ranges: yellow for 25-50 psi,
red for 51-100 psi,
silver for 101-150 psi,
and blue for 151-200 psi.
Change the spring to change the pressure range.
Which spring, silver or blue would you recommend?
Michael
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I would use the blue. I would figure +- 10% and I have mine set to 125+12.5=137.5 max working pressure. I would want the safety pop of to be set 150-200. Also a water drain needs to be at the lowest point. I can`t find a link, but the type used on all bigtruck and busses has a cable ran from it and can be drained by pulling the cable from under the front hood when you check your oil. It will screw in the tank end where the plug is now. Moisture is your worst enemy inside your air systen.
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Hey Chuck,
I'm looking at the recommended pop off valve and have a question. Once you install the range spring are they then adjustable to any pressure within that range? Example: If I were to install the 100-150 spring can I then set the pop off to say 140?
Ken B.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: Air Suspension Tank [message #75595 is a reply to message #75583] |
Wed, 03 March 2010 22:23 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Senior Member |
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| Ken Burton wrote on Wed, 03 March 2010 22:31 |
| C Boyd wrote on Wed, 03 March 2010 19:19 |
| gmchunter wrote on Wed, 03 March 2010 19:42 |
Thanks Boyd! That pressure relief valve comes with different springs and includes four color-coded springs calibrated to different pressure ranges: yellow for 25-50 psi,
red for 51-100 psi,
silver for 101-150 psi,
and blue for 151-200 psi.
Change the spring to change the pressure range.
Which spring, silver or blue would you recommend?
Michael
|
I would use the blue. I would figure +- 10% and I have mine set to 125+12.5=137.5 max working pressure. I would want the safety pop of to be set 150-200. Also a water drain needs to be at the lowest point. I can`t find a link, but the type used on all bigtruck and busses has a cable ran from it and can be drained by pulling the cable from under the front hood when you check your oil. It will screw in the tank end where the plug is now. Moisture is your worst enemy inside your air systen.
|
Hey Chuck,
I'm looking at the recommended pop off valve and have a question. Once you install the range spring are they then adjustable to any pressure within that range? Example: If I were to install the 100-150 spring can I then set the pop off to say 140?
Ken B.
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Hi Ken: I don`t know?? I haven`t had the need for it to pop off or even to jump the regulator to see exactly where it does pop off. I have been afraid of testing it. I have had issues with pop off valves on hot water heaters at home. Seems every time I pull the pop off it starts leaking soon after?? So I just kinda take it for granted that it won`t let my air go over 200 and it hasn`t popped at 125. It does seem that the spring could be fine tuned if needed. Your bedroom in the Crestmont is available if you don`t bring your coach..... I won`t be at Calhoun till Fri, but hope to be at Bean Station Thurs.
C. Boyd
76 Crestmont
East Tennessee
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| Re: Air Suspension Tank [message #75597 is a reply to message #75595] |
Wed, 03 March 2010 22:27 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Senior Member |
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| C Boyd wrote on Wed, 03 March 2010 23:23 |
| Ken Burton wrote on Wed, 03 March 2010 22:31 |
| C Boyd wrote on Wed, 03 March 2010 19:19 |
| gmchunter wrote on Wed, 03 March 2010 19:42 |
Thanks Boyd! That pressure relief valve comes with different springs and includes four color-coded springs calibrated to different pressure ranges: yellow for 25-50 psi,
red for 51-100 psi,
silver for 101-150 psi,
and blue for 151-200 psi.
Change the spring to change the pressure range.
Which spring, silver or blue would you recommend?
Michael
|
I would use the blue. I would figure +- 10% and I have mine set to 125+12.5=137.5 max working pressure. I would want the safety pop of to be set 150-200. Also a water drain needs to be at the lowest point. I can`t find a link, but the type used on all bigtruck and busses has a cable ran from it and can be drained by pulling the cable from under the front hood when you check your oil. It will screw in the tank end where the plug is now. Moisture is your worst enemy inside your air systen.
|
Hey Chuck,
I'm looking at the recommended pop off valve and have a question. Once you install the range spring are they then adjustable to any pressure within that range? Example: If I were to install the 100-150 spring can I then set the pop off to say 140?
Ken B.
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Hi Ken: I don`t know?? I haven`t had the need for it to pop off or even to jump the regulator to see exactly where it does pop off. I have been afraid of testing it. I have had issues with pop off valves on hot water heaters at home. Seems every time I pull the pop off it starts leaking soon after?? So I just kinda take it for granted that it won`t let my air go over 200 and it hasn`t popped at 125. It does seem that the spring could be fine tuned if needed. Your bedroom in the Crestmont is available if you don`t bring your coach..... I won`t be at Calhoun till Fri, but hope to be at Bean Station Thurs.
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Remember this is the $4 one. MMC has fully adjustable ones in their book for more $. I`m the kinda guy that carries 2 bics, one without flint, one without fluid..
C. Boyd
76 Crestmont
East Tennessee
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| Re: Air Suspension Tank [message #75598 is a reply to message #75587] |
Wed, 03 March 2010 22:37 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Senior Member |
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| Jim Galbavy wrote on Wed, 03 March 2010 22:47 |
Chuck, coolant hoses around the engine and up to the door are about 5 years old. From the door to the water heater was replaced by Jeff Sirum last year when I had to get the water heater replaced (if you can believe it, the hoses from the door to the water heater were only factory original). Can you say that God looks out for fools like me.. ....if only on a part time basis? How many feet of blue hose should I get?
Since my air tank is up front on the pass. side (under the batteries) my ball valve is just behind the end of the pass side bumper.
jim galbavy
'73 X-CL (ANNIE)
Chesterfield, Va
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Well Jim I haven`t measured the amount of hose needed. I think Mr. ERF has it somewhere, I`ll dig around tomorrow or go to the barn and measure. Since yours is the early one I think the hoses are accesable on the outside? I`ll look at my 74 and see. We might need a little Pit time. I sent you a PM caused I lost my Address book when my HD quit.
I have found that God takes care of his own, even us foolish ones.
C. Boyd
76 Crestmont
East Tennessee
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| Re: [GMCnet] Air Suspension Tank [message #75603 is a reply to message #75602] |
Wed, 03 March 2010 23:05 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Senior Member |
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Thanks Mr ERF.. but Jim hijacked the thread, we were wondering how much heater hose it takes to replace from motor to house water heater and back? and what size??
C. Boyd
76 Crestmont
East Tennessee
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