Home » Public Forums » GMCnet » Diameter of stock Air bags
| Diameter of stock Air bags [message #354552] |
Fri, 08 May 2020 21:17  |
Larry
Messages: 2875
Registered: January 2004
Location: Menomonie, WI
Karma: 10
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Senior Member |
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Anybody out there know what the diameter of the stock air bag is?
Larry 
78 Royale w/500 Caddy
Menomonie, WI.
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| Re: Diameter of stock Air bags [message #354554 is a reply to message #354552] |
Fri, 08 May 2020 23:46  |
lqqkatjon
Messages: 2324
Registered: October 2010
Location: St. Cloud, MN
Karma: 5
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Senior Member |
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Larry. It kinda varies by inflation a little. Do you want me to send you a spare one for testing? Could speedy it monday?
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/
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| Re: [GMCnet] Diameter of stock Air bags [message #354558 is a reply to message #354557] |
Sat, 09 May 2020 09:04 |
powwerjon
Messages: 849
Registered: March 2013
Karma: -2
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Senior Member |
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Larry,
Just got back from AZ last night, 4 days and 3 nights of adventure to get home.
I used to have a Harrison rear system on the 77 GMC that we first owned and I researched these numbers from Leigh Harrison a number of years ago before he passed. I do have the part numbers for the rotors too. They are available and are not that costly and was easier to just replace them.
Now able to get to my parts and tech manuals.
The original Harrison air spring was a Firestone A01-760-0335 and is very hard to find. An acceptable replacement is a Firestone W21-760-7325. This bag is slightly larger that the original air spring but will fit.
I have also attached an album that show the Harrison system and a comparison of the Harrison rotor and the Cad rotor.
http://www.gmcmhphotos.com/photos/g5661-disk-brake-upgrade-leigh-harrison-brakes.html
Regards,
J.R. Wright
GMC Great Laker MHC
GMCGL Tech Editor
GMC Eastern States Charter Member
GMCMI
78 GMC Buskirk 29.5’ Stretch
75 GMC Avion (Under Reconstruction)
Michigan
Home again!
> On May 9, 2020, at 9:01 AM, Larry via Gmclist wrote:
>
> 6cuda6 wrote on Sat, 09 May 2020 07:35
>> sent you a PM with the specs....
>
> Thanks, email sent.
> --
> Larry
> 78 Royale w/500 Caddy
> Menomonie, WI.
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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| Re: [GMCnet] Diameter of stock Air bags [message #354559 is a reply to message #354558] |
Sat, 09 May 2020 09:42 |
6cuda6
Messages: 975
Registered: June 2019
Karma: -6
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Senior Member |
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Mr Wright Sir, I have some question about this stuff that i would like to pick your brain about but i see you are not excepting PM's...how does wone contact you?
powwerjon wrote on Sat, 09 May 2020 10:04Larry,
Just got back from AZ last night, 4 days and 3 nights of adventure to get home.
I used to have a Harrison rear system on the 77 GMC that we first owned and I researched these numbers from Leigh Harrison a number of years ago before he passed. I do have the part numbers for the rotors too. They are available and are not that costly and was easier to just replace them.
Now able to get to my parts and tech manuals.
The original Harrison air spring was a Firestone A01-760-0335 and is very hard to find. An acceptable replacement is a Firestone W21-760-7325. This bag is slightly larger that the original air spring but will fit.
I have also attached an album that show the Harrison system and a comparison of the Harrison rotor and the Cad rotor.
http://www.gmcmhphotos.com/photos/g5661-disk-brake-upgrade-leigh-harrison-brakes.html
Regards,
J.R. Wright
GMC Great Laker MHC
GMCGL Tech Editor
GMC Eastern States Charter Member
GMCMI
78 GMC Buskirk 29.5’ Stretch
75 GMC Avion (Under Reconstruction)
Michigan
Home again!
> On May 9, 2020, at 9:01 AM, Larry via Gmclist wrote:
>
> 6cuda6 wrote on Sat, 09 May 2020 07:35
>> sent you a PM with the specs....
>
> Thanks, email sent.
> --
> Larry
> 78 Royale w/500 Caddy
> Menomonie, WI.
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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Rich Mondor,
Brockville, ON
77 Hughes 2600
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| Re: [GMCnet] Diameter of stock Air bags [message #354560 is a reply to message #354559] |
Sat, 09 May 2020 10:08 |
Olly Schmidt
Messages: 1265
Registered: February 2014
Location: Germany and Scottsville, ...
Karma: 8
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Senior Member |
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On 09.05.20 16:42, 6cuda6--- via Gmclist wrote:
> I have some question about this stuff that i would like to pick your
> brain about but i see you are not excepting PM's...how does wone
> contact you?
Maybe just use the regular forum. I am sure others love to see questions
and answers as well :-)
--
Best regards
Olly Schmidt
PGP KeyID: 0x4196BF22
'76a 26' Eleganza II - Virginia, US
'73 23' Sequoia - Schleswig-Holstein, Germany
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Best regards
Olly Schmidt
PGP Key ID: 0x18a9 3a1f 4196 bf22
'76a Eleganza II, VA
'73 Sequoia, SH, Germany
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| Re: [GMCnet] Diameter of stock Air bags [message #354564 is a reply to message #354563] |
Sat, 09 May 2020 13:23 |
powwerjon
Messages: 849
Registered: March 2013
Karma: -2
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Senior Member |
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Larry,
If you go to: truckspring.com/products/Firestone-Double-Convoluted-Air-Spring-26C-Style-14-NPT_W21-760-7325.aspx You can find the tech and drawing for that air spring.
JR
> On May 9, 2020, at 2:00 PM, Larry via Gmclist wrote:
>
> powwerjon wrote on Sat, 09 May 2020 09:04
>> Larry,
>> Just got back from AZ last night, 4 days and 3 nights of adventure to get home.
>>
>> I used to have a Harrison rear system on the 77 GMC that we first owned and I researched these numbers from Leigh Harrison a number of years ago
>> before he passed. I do have the part numbers for the rotors too. They are available and are not that costly and was easier to just replace them.
>>
>> Now able to get to my parts and tech manuals.
>>
>> The original Harrison air spring was a Firestone A01-760-0335 and is very hard to find. An acceptable replacement is a Firestone W21-760-7325.
>> This bag is slightly larger that the original air spring but will fit.
>>
>> I have also attached an album that show the Harrison system and a comparison of the Harrison rotor and the Cad rotor.
>>
>> http://www.gmcmhphotos.com/photos/g5661-disk-brake-upgrade-leigh-harrison-brakes.html
>>
>> Regards,
>>
>> J.R. Wright
>> GMC Great Laker MHC
>> GMCGL Tech Editor
>> GMC Eastern States Charter Member
>> GMCMI
>> 78 GMC Buskirk 29.5’ Stretch
>> 75 GMC Avion (Under Reconstruction)
>> Michigan
>> Home again!
>
> Thanks for the info JR. Just what I needed.
>
> --
> Larry
> 78 Royale w/500 Caddy
> Menomonie, WI.
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
_______________________________________________
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| Re: [GMCnet] Diameter of stock Air bags [message #354566 is a reply to message #354558] |
Sat, 09 May 2020 13:48 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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John, The Quadra bag system uses anothe model than Harrison.
We stock the bags for Harrison as well as all parts for GMC MH.
On Sat, May 9, 2020 at 11:36 AM John Wright via Gmclist <
gmclist@list.gmcnet.org> wrote:
> One other thing, that bag could be used in the “Quada Bag system!
>
> JR
>> On May 9, 2020, at 2:00 PM, Larry via Gmclist
> wrote:
>>
>> powwerjon wrote on Sat, 09 May 2020 09:04
>>> Larry,
>>> Just got back from AZ last night, 4 days and 3 nights of adventure to
> get home.
>>>
>>> I used to have a Harrison rear system on the 77 GMC that we first owned
> and I researched these numbers from Leigh Harrison a number of years ago
>>> before he passed. I do have the part numbers for the rotors too. They
> are available and are not that costly and was easier to just replace them.
>>>
>>> Now able to get to my parts and tech manuals.
>>>
>>> The original Harrison air spring was a Firestone A01-760-0335 and is
> very hard to find. An acceptable replacement is a Firestone W21-760-7325.
>>> This bag is slightly larger that the original air spring but will fit.
>>>
>>> I have also attached an album that show the Harrison system and a
> comparison of the Harrison rotor and the Cad rotor.
>>>
>>>
> http://www.gmcmhphotos.com/photos/g5661-disk-brake-upgrade-leigh-harrison-brakes.html
>>>
>>> Regards,
>>>
>>> J.R. Wright
>>> GMC Great Laker MHC
>>> GMCGL Tech Editor
>>> GMC Eastern States Charter Member
>>> GMCMI
>>> 78 GMC Buskirk 29.5’ Stretch
>>> 75 GMC Avion (Under Reconstruction)
>>> Michigan
>>> Home again!
>>
>> Thanks for the info JR. Just what I needed.
>>
>> --
>> Larry
>> 78 Royale w/500 Caddy
>> Menomonie, WI.
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.gmcrvparts.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] Diameter of stock Air bags [message #354567 is a reply to message #354563] |
Sat, 09 May 2020 13:35 |
powwerjon
Messages: 849
Registered: March 2013
Karma: -2
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Senior Member |
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One other thing, that bag could be used in the “Quada Bag system!
JR
> On May 9, 2020, at 2:00 PM, Larry via Gmclist wrote:
>
> powwerjon wrote on Sat, 09 May 2020 09:04
>> Larry,
>> Just got back from AZ last night, 4 days and 3 nights of adventure to get home.
>>
>> I used to have a Harrison rear system on the 77 GMC that we first owned and I researched these numbers from Leigh Harrison a number of years ago
>> before he passed. I do have the part numbers for the rotors too. They are available and are not that costly and was easier to just replace them.
>>
>> Now able to get to my parts and tech manuals.
>>
>> The original Harrison air spring was a Firestone A01-760-0335 and is very hard to find. An acceptable replacement is a Firestone W21-760-7325.
>> This bag is slightly larger that the original air spring but will fit.
>>
>> I have also attached an album that show the Harrison system and a comparison of the Harrison rotor and the Cad rotor.
>>
>> http://www.gmcmhphotos.com/photos/g5661-disk-brake-upgrade-leigh-harrison-brakes.html
>>
>> Regards,
>>
>> J.R. Wright
>> GMC Great Laker MHC
>> GMCGL Tech Editor
>> GMC Eastern States Charter Member
>> GMCMI
>> 78 GMC Buskirk 29.5’ Stretch
>> 75 GMC Avion (Under Reconstruction)
>> Michigan
>> Home again!
>
> Thanks for the info JR. Just what I needed.
>
> --
> Larry
> 78 Royale w/500 Caddy
> Menomonie, WI.
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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