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Max pressure qbags [message #293496] Thu, 07 January 2016 05:44 Go to next message
appie is currently offline  appie   Austria
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I have qbags and now new kyb shocks. Qbags manual says max 150 psi I am wondering would lifting to coach with 150 psi be alright for the shocks?
Reasn I am wondering is that It annoyes me that I have to let air out of the system before I can rise here when entering a strech of bad road, bumps etc.
I now have 90/120 pressureswitch amd figure a 110/140 would solv that problem. Just dont want to ruin my new shocks


Appie eleganza 76 "Olga" now sadly sold 6 wheel discbrake Quadrabags Springfield stage 2 462 olds Manny tranny ( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html Fulltiming in Europe july 2014 til july 2016 Denmark
Re: [GMCnet] Max pressure qbags [message #293498 is a reply to message #293496] Thu, 07 January 2016 05:52 Go to previous messageGo to next message
Mr ERFisher is currently offline  Mr ERFisher   United States
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On Thursday, January 7, 2016, lenze middelberg wrote:

> I have qbags and now new kyb shocks. Qbags manual says max 150 psi I am
> wondering would lifting to coach with 150 psi be alright for the shocks?


What is qbags?



> Reasn I am wondering is that It annoyes me that I have to let air out of
> the system before I can rise here when entering a strech of bad road, bumps
> etc.
> I now have 90/120 pressureswitch amd figure a 110/140 would solv that
> problem. Just dont want to ruin my new shocks
> --
> Appie
> eleganza 76 "Olga"
> 6 wheel discbrake
> Quadrabags
> Springfield stage 2 462 olds
> Manny tranny
> ( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html
> Fulltiming in Europe since july 1 2014
> Denmark
>
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> GMCnet mailing list
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-------
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Re: [GMCnet] Max pressure qbags [message #293499 is a reply to message #293498] Thu, 07 January 2016 05:55 Go to previous messageGo to next message
Olly Schmidt is currently offline  Olly Schmidt   United States
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Am 07.01.2016 um 12:52 schrieb gene Fisher:
> On Thursday, January 7, 2016, lenze middelberg wrote:
>
>> I have qbags and now new kyb shocks. Qbags manual says max 150 psi I am
>> wondering would lifting to coach with 150 psi be alright for the shocks?
>
> What is qbags?

Probably


> --
> Appie
> [..]
> Quadrabags
>

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the internet company
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Re: [GMCnet] Max pressure qbags [message #293501 is a reply to message #293499] Thu, 07 January 2016 06:46 Go to previous messageGo to next message
appie is currently offline  appie   Austria
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Just found this doscussion. http://gmc.mybirdfeeder.net/GMCforum/index.php?t=msg&th=29775&prevloaded=1&rid=3328&start=20
Does not realy touches possible stress on shocks and shock mounts with 150 psi


Appie eleganza 76 "Olga" now sadly sold 6 wheel discbrake Quadrabags Springfield stage 2 462 olds Manny tranny ( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html Fulltiming in Europe july 2014 til july 2016 Denmark
Re: [GMCnet] Max pressure qbags [message #293504 is a reply to message #293501] Thu, 07 January 2016 06:58 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
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Appie,

I gave this a bit of thought and let's put it this way, the guys that designed the GMC did not put stops on the arms to keep the
shocks from being fully compressed when the coach was raised to the max with the OEM bags. The OEM bags are larger in diameter and
would apply greater pressure on the shocks than the Q-bag air bags at the same pressure.

Bottom line, I wouldn't worry about it.

HOWEVER, I don't understand why you have to let air out of the system. The ride height (front and rear) should be set IAW the specs
in the maintenance manual.

Regards,
Rob M.
The Pedantic Mechanic

-----Original Message-----
From: lenze middelberg

Just found this doscussion. http://gmc.mybirdfeeder.net/GMCforum/index.php?t=msg&th=29775&prevloaded=1&rid=3328&start=20
Does not realy touches possible stress on shocks and shock mounts with 150 psi
--
Appie


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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426
Re: [GMCnet] Max pressure qbags [message #293506 is a reply to message #293504] Thu, 07 January 2016 07:27 Go to previous messageGo to next message
appie is currently offline  appie   Austria
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Normal driving pressure is 80-90 psi. Now if I want to rise the coach the pressure in the tank and the bellows equals out somewhere between the 90 and 120 psi ( probably just above 90) andnothing happens before I let out air so the pressure comes below 90 psi and the compressor starts


I guess one could fix this electricaly as well
Wonder how much is needed to bottom the shockes



Appie eleganza 76 "Olga" now sadly sold 6 wheel discbrake Quadrabags Springfield stage 2 462 olds Manny tranny ( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html Fulltiming in Europe july 2014 til july 2016 Denmark
Re: [GMCnet] Max pressure qbags [message #293512 is a reply to message #293506] Thu, 07 January 2016 10:38 Go to previous messageGo to next message
jimk is currently offline  jimk   United States
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You need to adjust the Dead Band on the pressure switch so you need to not
decrease the pressure as much.

On Thu, Jan 7, 2016 at 5:27 AM, lenze middelberg
wrote:

> Normal driving pressure is 80-90 psi. Now if I want to rise the coach the
> pressure in the tank and the bellows equals out somewhere between the 90 and
> 120 psi ( probably just above 90) andnothing happens before I let out air
> so the pressure comes below 90 psi and the compressor starts
>
>
> I guess one could fix this electricaly as well
> Wonder how much is needed to bottom the shockes
>
>
> --
> Appie
> eleganza 76 "Olga"
> 6 wheel discbrake
> Quadrabags
> Springfield stage 2 462 olds
> Manny tranny
> ( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html
> Fulltiming in Europe since july 1 2014
> Denmark
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>



--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
Re: [GMCnet] Max pressure qbags [message #293513 is a reply to message #293512] Thu, 07 January 2016 11:15 Go to previous messageGo to next message
appie is currently offline  appie   Austria
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Ofcourse. I forgot that I do not have the original adjustable pressureswitch, but one of these modern nonadjustable ones. Getting a other switch might solv the problem.

Still wondering how much pressure might bottom the shocks. Depends on weight , I guess


Appie eleganza 76 "Olga" now sadly sold 6 wheel discbrake Quadrabags Springfield stage 2 462 olds Manny tranny ( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html Fulltiming in Europe july 2014 til july 2016 Denmark
Re: [GMCnet] Max pressure qbags [message #293515 is a reply to message #293513] Thu, 07 January 2016 11:32 Go to previous messageGo to next message
jimk is currently offline  jimk   United States
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When you raise it to the max, the shock are stressed, but it is the bolts
that will be get a side moment applied. make sure they are tight.
Both KYB and Bilstein have a special bolt to handle it, however one need to
go gentle when it is at max. travel either way.
Bilstein had problems with the unit coming apart and would not warranty
them by declaring abuse.
I have yet to see that problem with the KYB yet as they are constructed
differently.

On Thu, Jan 7, 2016 at 9:15 AM, lenze middelberg
wrote:

> Ofcourse. I forgot that I do not have the original adjustable
> pressureswitch, but one of these modern nonadjustable ones. Getting a
> other switch
> might solv the problem.
>
> Still wondering how much pressure might bottom the shocks. Depends on
> weight , I guess
> --
> Appie
> eleganza 76 "Olga"
> 6 wheel discbrake
> Quadrabags
> Springfield stage 2 462 olds
> Manny tranny
> ( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html
> Fulltiming in Europe since july 1 2014
> Denmark
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>



--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
Re: [GMCnet] Max pressure qbags [message #293564 is a reply to message #293498] Fri, 08 January 2016 20:04 Go to previous messageGo to next message
Tom Whitton   United States
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Location: Paducah, KY
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Senior Member
Jim,

What is the "Dead Band" on the pressure switch? I tried to adjust the pressure on my switch a couple of years ago but couldn't figure out how to do it and gave up.

Tom Whitton
26 ft. updated GMC
Paducah, KY


Message: 16
Date: Thu, 7 Jan 2016 08:38:55 -0800
From: Jim Kanomata
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] Max pressure qbags
Message-ID:

Content-Type: text/plain; charset=UTF-8

You need to adjust the Dead Band on the pressure switch so you need to not
decrease the pressure as much.
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Re: Max pressure qbags [message #293568 is a reply to message #293496] Fri, 08 January 2016 21:58 Go to previous messageGo to next message
Bob de Kruyff   United States
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Location: Chandler, AZ
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Senior Member
appie wrote on Thu, 07 January 2016 04:44
I have qbags and now new kyb shocks. Qbags manual says max 150 psi I am wondering would lifting to coach with 150 psi be alright for the shocks?
Reasn I am wondering is that It annoyes me that I have to let air out of the system before I can rise here when entering a strech of bad road, bumps etc.
I now have 90/120 pressureswitch amd figure a 110/140 would solv that problem. Just dont want to ruin my new shocks

Going back to your original question, the stock airbags will require about 120 psi to reach full extension for a fully equipped 26 ft coach. I don't know what the effective area of the quad bags is for comparison, but hopefully a well engineered product will have that data for comparison and you should ask your supplier. What you need to think about is that at 120 psi, you are basically supporting the coach and not applying any excessive force on the shocks or mounts. If you go above that, the shocks will start to experience increased loads. The EL II system is designed to max out at 120 psi and cannot exceed that pressure for a reason.


Bob de Kruyff
78 Eleganza
Chandler, AZ
Re: [GMCnet] Max pressure qbags [message #293570 is a reply to message #293564] Fri, 08 January 2016 22:07 Go to previous messageGo to next message
jimk is currently offline  jimk   United States
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The switch has adjustment for max pressure so it will open the circuit when
it reaches a preset high pressure.
The dead band is built in and also adjustable so that the compressor will
not kick on when the pressure drops slightly.
The one we sell need to go down to40-50 psi before the compressor can come
on.
That is when it is adjusted for the highest dead band pressure.
I think we need to look for another style that will have a higher low band.














































On Fri, Jan 8, 2016 at 6:04 PM, Tom Whitton
wrote:

> Jim,
>
> What is the "Dead Band" on the pressure switch? I tried to adjust the
> pressure on my switch a couple of years ago but couldn't figure out how to
> do it and gave up.
>
> Tom Whitton
> 26 ft. updated GMC
> Paducah, KY
>
>
> Message: 16
> Date: Thu, 7 Jan 2016 08:38:55 -0800
> From: Jim Kanomata
> To: gmclist@list.gmcnet.org
> Subject: Re: [GMCnet] Max pressure qbags
> Message-ID:
>
> Content-Type: text/plain; charset=UTF-8
>
> You need to adjust the Dead Band on the pressure switch so you need to not
> decrease the pressure as much.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>



--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
Re: [GMCnet] Max pressure qbags [message #293571 is a reply to message #293570] Fri, 08 January 2016 22:18 Go to previous messageGo to next message
jimk is currently offline  jimk   United States
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Senior Member
Our Quadra Bag System reaches Max height at 135 psi on an average 26 ft.
coach.
The Harrison 4 bag unit needs 160 psi and even it will not raise a
stretched coach, that's when Jim Bounds came to us to come up with a unit
that can handle additional weight at lower pressure and also hold up
without frame distortion.
We based our design from Ken Rose unit and acquired the rights to use what
design he had and had Rick Flanagan redesign it for us.

On Fri, Jan 8, 2016 at 8:07 PM, Jim Kanomata wrote:

> The switch has adjustment for max pressure so it will open the circuit
> when it reaches a preset high pressure.
> The dead band is built in and also adjustable so that the compressor will
> not kick on when the pressure drops slightly.
> The one we sell need to go down to40-50 psi before the compressor can come
> on.
> That is when it is adjusted for the highest dead band pressure.
> I think we need to look for another style that will have a higher low band.
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
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>
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>
>
> On Fri, Jan 8, 2016 at 6:04 PM, Tom Whitton
> wrote:
>
>> Jim,
>>
>> What is the "Dead Band" on the pressure switch? I tried to adjust the
>> pressure on my switch a couple of years ago but couldn't figure out how to
>> do it and gave up.
>>
>> Tom Whitton
>> 26 ft. updated GMC
>> Paducah, KY
>>
>>
>> Message: 16
>> Date: Thu, 7 Jan 2016 08:38:55 -0800
>> From: Jim Kanomata
>> To: gmclist@list.gmcnet.org
>> Subject: Re: [GMCnet] Max pressure qbags
>> Message-ID:
>>
>> Content-Type: text/plain; charset=UTF-8
>>
>> You need to adjust the Dead Band on the pressure switch so you need to not
>> decrease the pressure as much.
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
>
>
> --
> Jim Kanomata
> Applied/GMC, Fremont,CA
> jimk@appliedairfilters.com
> http://www.appliedgmc.com
> 1-800-752-7502
>



--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
Re: [GMCnet] Max pressure qbags [message #293586 is a reply to message #293564] Sat, 09 January 2016 07:54 Go to previous messageGo to next message
Matt Colie is currently offline  Matt Colie   United States
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Tom Whitton wrote on Fri, 08 January 2016 21:04
Jim,

What is the "Dead Band" on the pressure switch? I tried to adjust the pressure on my switch a couple of years ago but couldn't figure out how to do it and gave up.

Tom Whitton

Tom,

That differential between start and stop is often referred to as "Dead Band".

How the shut-off adjusts is kind of specific to the switch. Most of mine have a SquareD switch that has a single nut on a spring. If it has a smaller version of the same thing off to the side, that is probably a "Differential" adjustment.

That reminds me, I need to put a pressure gauge in my coach.

Matt


Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
Re: [GMCnet] Max pressure qbags [message #293595 is a reply to message #293586] Sat, 09 January 2016 08:51 Go to previous messageGo to next message
appie is currently offline  appie   Switzerland
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Thanks for all the input

Guess I will get a adjustable switch and woould love a larger tank if I can find out where to put it.
The viair says upto 5 Gl


Appie eleganza 76 "Olga" now sadly sold 6 wheel discbrake Quadrabags Springfield stage 2 462 olds Manny tranny ( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html Fulltiming in Europe july 2014 til july 2016 Denmark
Re: [GMCnet] Max pressure qbags [message #293642 is a reply to message #293595] Sat, 09 January 2016 17:29 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
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Appie,

What rear suspension system does Olga have; PowerLevel or Electrolevel I?

Regards,
Rob M.
The Pedantic Mechanic

-----Original Message-----
From: lenze middelberg

Thanks for all the input

Guess I will get a adjustable switch and woould love a larger tank if I can find out where to put it.
The viair says upto 5 Gl
--
Appie


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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426
Re: [GMCnet] Max pressure qbags [message #293662 is a reply to message #293642] Sun, 10 January 2016 05:55 Go to previous messageGo to next message
appie is currently offline  appie   Portugal
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Elevtrolevel 1

Appie eleganza 76 "Olga" now sadly sold 6 wheel discbrake Quadrabags Springfield stage 2 462 olds Manny tranny ( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html Fulltiming in Europe july 2014 til july 2016 Denmark
Re: [GMCnet] Max pressure qbags [message #293663 is a reply to message #293662] Sun, 10 January 2016 06:35 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
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Appie,

Sorry Mate I can't help as I know nothing about the system.

Regards,
Rob M.
The Pedantic Mechanic

-----Original Message-----
From: lenze middelberg

Elevtrolevel 1
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Appie


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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426
Re: [GMCnet] Max pressure qbags [message #293679 is a reply to message #293595] Sun, 10 January 2016 14:32 Go to previous messageGo to next message
Bullitthead is currently offline  Bullitthead   United States
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"Guess I will get a adjustable switch and woould love a larger tank if I can find out where to put it."

Appie,
You don't actually need a space for a larger tank, you can add smaller tanks stashed in a lot of places, like this one that came with the air horn system I got from ebay. Using the trumpets, solenoid, and tank on the GMC, and using the compressor and pressure switch on another vehicle air system.

http://www.gmcmhphotos.com/photos/electrical/p59812-extra-electric-and-air-capacity.html


Terry Kelpien ASE Master Technician 73 Glacier 260 Smithfield, Va.
Re: [GMCnet] Max pressure qbags [message #293685 is a reply to message #293679] Sun, 10 January 2016 16:29 Go to previous messageGo to previous message
appie is currently offline  appie   Switzerland
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Good idear. Thank you

Appie eleganza 76 "Olga" now sadly sold 6 wheel discbrake Quadrabags Springfield stage 2 462 olds Manny tranny ( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html Fulltiming in Europe july 2014 til july 2016 Denmark
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