Home » Public Forums » GMCnet » Airbags ?
| Airbags ? [message #71421] |
Thu, 21 January 2010 14:52  |
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gmcdude76
Messages: 102
Registered: December 2009
Location: Northern Ca
Karma: 1
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Senior Member |
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Question,
When not useing or in storage whats the best pressure or psi you want in your airbags?i saw something from Jim in Florida that the oem airbags are maxed out or over the rated psi when set to full or
auto level setting?
I sometimes realease some of the pressure when sitting or level so as to get as much life as possible since i have replaced mine and want them to hold up
Thanks
Gmc76Birchaven 23'94947
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| Re: [GMCnet] Airbags ? [message #71424 is a reply to message #71421] |
Thu, 21 January 2010 15:10  |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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Senior Member |
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when ever I am home, the GMC is up on blocks under the bogies with no, or,
low pressure.
http://www.gmcmhphotos.com/photos/showphoto.php?photo=5274&cat=3231
the big issue, was the airbags would "HOTDOG" if they were under pressure
all of the time. If the rig is blocked up, it is stable, level, and
anxious to go ;>)
gene
On Thu, Jan 21, 2010 at 12:52 PM, Don <mr_donberman@yahoo.com> wrote:
>
>
> Question,
>
> When not useing or in storage whats the best pressure or psi you want in
> your airbags?i saw something from Jim in Florida that the oem airbags are
> maxed out or over the rated psi when set to full or
> auto level setting?
>
>
> I sometimes realease some of the pressure when sitting or level so as to
> get as much life as possible since i have replaced mine and want them to
> hold up
>
>
> Thanks
> --
> Gmc76 Birchaven transmode 23 foot/Carson Toyhauler/Burgman 400
>
>
>
>
>
>
>
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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| Re: [GMCnet] Airbags ? [message #71426 is a reply to message #71424] |
Thu, 21 January 2010 15:27 |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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Senior Member |
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I concur with Gene's suggestion. I built up some blocking material from 4 x 4 timbers, that I place the coach on when it is parked. Then, I let out he air, until the coach is resting on the blocking. Minimal air pressure in the bag. This also keeps the coach's weight from marring the asphalt parking pad.
Additional bonus, working on the coach and knowing that it is not going to drop.
Tom Phipps,
Winter tomorrow.
2012 Phoenix Cruiser model 2552
KA4CSG
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| Re: [GMCnet] Airbags ? [message #71437 is a reply to message #71421] |
Thu, 21 January 2010 17:01 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Don,
Double Trouble is stored for 9 months a year over in Humble, Texas. I raise
the airbags to the maximum, put jack stands under frame as close to the rear
bogies as possible then let ALL the air out of the airbags.
Regards,
Rob Mueller
Sydney, Australia
AUS '75 Avion-The Blue Streak TZE365V100428
USA '75 Avion-Double Trouble TZE365V100426
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Don
Sent: Friday, 22 January 2010 7:53 AM
To: gmclist@temp.gmcnet.org
Subject: [GMCnet] Airbags ?
Question,
When not useing or in storage whats the best pressure or psi you want in
your airbags?i saw something from Jim in Florida that the oem airbags are
maxed out or over the rated psi when set to full or
auto level setting?
I sometimes realease some of the pressure when sitting or level so as to get
as much life as possible since i have replaced mine and want them to hold up
Thanks
--
Gmc76 Birchaven transmode 23 foot/Carson Toyhauler/Burgman 400
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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
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| Re: [GMCnet] Airbags ? [message #71441 is a reply to message #71424] |
Thu, 21 January 2010 17:13 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Hot doging happens when your overloaded or height is too high.
On Thu, Jan 21, 2010 at 1:10 PM, Mr.erf ERFisher <mr.erfisher@gmail.com> wrote:
> when ever I am home, the GMC is up on blocks under the bogies with no, or,
> low pressure.
>
> http://www.gmcmhphotos.com/photos/showphoto.php?photo=5274&cat=3231
>
> the big issue, was the airbags would "HOTDOG" if they were under pressure
> all of the time. Â If the rig is blocked up, it is stable, level, and
> anxious to go ;>)
>
> gene
>
>
>
> On Thu, Jan 21, 2010 at 12:52 PM, Don <mr_donberman@yahoo.com> wrote:
>
>>
>>
>> Question,
>>
>> When not useing or in storage whats the best pressure or psi you want in
>> your airbags?i saw something from Jim in Florida that the oem airbags are
>> maxed out or over the rated psi when set to full or
>> auto level setting?
>>
>>
>> I sometimes realease some of the pressure when sitting or level so as to
>> get as much life as possible since i have replaced mine and want them to
>> hold up
>>
>>
>> Thanks
>> --
>> Gmc76 Birchaven transmode 23 foot/Carson Toyhauler/Burgman 400
>>
>>
>>
>>
>>
>>
>>
>>
>> _______________________________________________
>> GMCnet mailing list
>> List Information and Subscription Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
>
>
>
> --
> Gene Fisher -- 74-23,77PB/ore/ca
> “Give a man a fish; you have fed him for today --- give him a URL and
> -------
> http://gmcmotorhome.info/
> Alternator Protection Cable
> http://gmcmotorhome.info/APC.html
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
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
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| Re: [GMCnet] Airbags ? [message #71443 is a reply to message #71421] |
Thu, 21 January 2010 17:21 |
Rick Denney
Messages: 430
Registered: January 2004
Karma: 0
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Senior Member |
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Don writes...
> When not useing or in storage whats the best pressure or psi you
> want in your airbags?i saw something from Jim in Florida that the
> oem airbags are maxed out or over the rated psi when set to full or
> auto level setting?
Most coaches run properly level with about 85 or 90 psi. Light coaches
like mine require less. The bags themselves are rated to 150 psi, and
our pump pressure switches usually cut out at about 120 or 125 psi.
The stock system won't get that high in Travel (Auto) mode. For
leveling at a campsite, keeping a bag at 120 for a couple of days is
no big deal, but with my light coach, I reach full height at about 100
psi or thereabouts.
For storage, I just leave my bags in Travel mode and throw 6x4"
timbers under the bogie frames (so that the 6" dimension is vertical).
The bags will settle down onto those timbers in a few days, and they
will keep the wheels from reaching the wheel wells, which is only a
problem with early coaches. If my system held air so well that it
wouldn't settle, I would lower the coach onto the timbers and drain
the bags. My system does that, um, automatically.
Rick "atmospheric pressure" Denney
'73 230 Ex-Glacier "Jaws"
Northern Virginia
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'73 Glacier 230 "Jaws"
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| Re: Airbags ? [message #71485 is a reply to message #71421] |
Thu, 21 January 2010 22:05 |
gmchunter
Messages: 222
Registered: March 2008
Location: ORANGE, CA
Karma: 0
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I have a 78 23' birchaven which might be light compared to the 26' coaches. My airbags had schraeder valves in the end as the compressor wasn't working when I bought the coach. Had the compressor rebuilt but haven't connected all the lines, etc., yet. Anyway I run about 60 lbs of air in the bags and that seems to put me at the right level and seems to have good driving characteristics. Anything above that makes the rear end sit very high.
Michael
[Updated on: Thu, 21 January 2010 22:05] Report message to a moderator |
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| Re: [GMCnet] Airbags ? [message #71507 is a reply to message #71485] |
Fri, 22 January 2010 08:38 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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In the past 30 years, I have not found anyone that had any better
handling than using the height shown in the book.
Height is determined not by pressure only.
At our shop we use a stick that goes from the ground to the bottom o
the frame at the locations shown. It takes too much time to measure
from the slot, plus you cannot locate the slot on the rear left as the
generator covers the hole.
On Thu, Jan 21, 2010 at 8:05 PM, MICHAEL FOSTER <mfoster356@yahoo.com> wrote:
>
>
> I have a 78 23' birchaven which might be light compared to the 26' coaches. Â My airbags had schraeder valves in the end as the compressor wasn't working when I bought the coach. Â Had the compressor rebuilt but haven't connected all the lines, etc., yet. Â Anyway I run about 60 lbs of air in the bags and that seems to put me at the right level and seems to have good driving characteristics.
>
> Michael
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
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
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| Re: [GMCnet] Airbags ? [message #71542 is a reply to message #71507] |
Fri, 22 January 2010 14:57 |
shawnee
Messages: 422
Registered: February 2004
Location: NC
Karma: 0
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| jimk wrote on Fri, 22 January 2010 09:38 |
In the past 30 years, I have not found anyone that had any better
handling than using the height shown in the book.
Height is determined not by pressure only.
At our shop we use a stick that goes from the ground to the bottom o
the frame at the locations shown. It takes too much time to measure
from the slot, plus you cannot locate the slot on the rear left as the
generator covers the hole.
|
Jim,
On my first time at a GMCMI Convention I won a tool to measure the height of the GMC using the frame slots. I don't know who made it but I suspect Bob Drews. It is a small wood base with a hole drilled in the center and a piece of old TV antenna tube about 14 inches long stuck in it. There are two strips of tape about 3/16 inches wide around the antenna tube. One is for measuring the front and one for the back of the coach using the slots. The width of the tape is exactly the tolerance given in the book. You are right about not being able to find the slot on the generator side so I put a mark on the tube that shows the bottom of the frame on the passenger's side with the tolerance marked there. Every time I come back from a trip I check for the correct ride height. My garage floor is concrete so it makes a good base point. Usually it is OK, but occasionally one
or more is off a little so I make the modification.
Easy to make and use. I will bring it to Montgomery for the GMCMEI and if anyone want to see it, come over to my camp site.
Gene Dotson
74 Canyonlands
www.bdub.net/Motorhome_Enhancements New Windows and Aluminum Radiators
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| Re: [GMCnet] Airbags ? [message #71543 is a reply to message #71424] |
Fri, 22 January 2010 15:29 |
Oldngray
Messages: 544
Registered: August 2009
Location: Punta Gorda Florida
Karma: 0
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[quote title=Mr ERFisher wrote on Thu, 21 January 2010 16:10]when ever I am home, the GMC is up on blocks under the bogies with no, or,
low pressure.
http://www.gmcmhphotos.com/photos/showphoto.php?photo=5274&cat=3231
the big issue, was the airbags would "HOTDOG" if they were under pressure
all of the time. If the rig is blocked up, it is stable, level, and
anxious to go ;>)
gene
What are the dimensions of your blocks? Looking mainly for the height that you lower your Coach to.
Richard MacDonald
Punta Gorda, Florida
Sold our TZE April 2015
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