| What is the normal air bag length? [message #128446] |
Fri, 03 June 2011 07:28  |
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RF_Burns
Messages: 2277
Registered: June 2008
Location: S. Ontario, Canada
Karma: 3
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Some may have read my other thread about my new Silvertone airbags being too short at full extension.
I'm wondering what is the normal airbag extension at normal ride height? I seem to be about 1" low at the back at my automatic ride setting, and my airbags are at ~15" total from arm to arm, so if I got them up to proper ride height they will be 15.5"plus.
I looked at the length of the emergency airbag substitutes and they show either 13.5" or 15", so that makes me wonder was their 2 different arms? or?
http://gmcmotorhome.info/rear.html#bagrod
Obviously mine has the 15" length.
Or was 13.5" the airbag length for 16.5" bias ply tires and 15" is now the length with 16" radials?
Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that
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| Re: What is the normal air bag length? [message #128475 is a reply to message #128446] |
Fri, 03 June 2011 12:01  |
bwevers
Messages: 598
Registered: October 2010
Location: San Jose
Karma: 5
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Senior Member |
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I looked at the spec for the Firestone 5412 (Silvertone). It
has a minimum of 6.7" and a max useful extension of 14.5".
A custom bracket makes up the difference between the stock
airbag and the 5412 (1T14F-1 airbag).
Regards,
Bill
Bill Wevers GMC49ers, GMC Western States
1975 Glenbrook - Manny Powerdrive, OneTon
455 F Block, G heads
San Jose
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| Re: What is the normal air bag length? [message #128501 is a reply to message #128446] |
Fri, 03 June 2011 16:12 |
bwevers
Messages: 598
Registered: October 2010
Location: San Jose
Karma: 5
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Senior Member |
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Bruce,
The Firestone part I looked at is W01-358-5412.
It has a 5 inch long piston with internal bump stop.
I think you might have the W01-358-5405 airbag.
The 5405 has a 3.62" long piston. It has less travel.
Regards,
Bill
++++from the Firestone website
TECHNICAL DATA -
Order Number: W01-358-5412
Bellows #: 1T14C-3
Assembly Weight: 8.2 lbs
Design Height: 9.5-11.5 inches
Minimum Jounce Height: 6.8 inches
Maximum Rebound Height: 16.21 inches
Loading Capacity at 20 psig: 648 lbsf
Loading Capacity at 60 psig: 1,944 lbsf
Loading Capacity at 90 psig: 2,916 lbsf
Natural Frequency: Hz
Maximum Diameter: 9.1 inches
Material Type: Natural Rubber
Operating Temperature: 57Cē to -54Cē
Remarks: F-4 PISTON
TR: A9217
TECHNICAL DATA -
Order Number: W01-358-5405
Bellows #: 1T14C-3
Assembly Weight: 6.6 lbs
Design Height: 9-10.5 inches
Minimum Jounce Height: 4.62 inches
Maximum Rebound Height: 14.72 inches
Loading Capacity at 20 psig: 636 lbsf
Loading Capacity at 60 psig: 1,908 lbsf
Loading Capacity at 90 psig: 2,862 lbsf
Natural Frequency: Hz
Maximum Diameter: 9.1 inches
Material Type: Natural Rubber
Operating Temperature: 57Cē to -54Cē
Remarks: C-3 ON F-2 PISTON
TR: B5597
Bill Wevers GMC49ers, GMC Western States
1975 Glenbrook - Manny Powerdrive, OneTon
455 F Block, G heads
San Jose
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| Re: What is the normal air bag length? [message #128508 is a reply to message #128446] |
Fri, 03 June 2011 17:22 |
bwevers
Messages: 598
Registered: October 2010
Location: San Jose
Karma: 5
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Senior Member |
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Bruce,
My coach has 13" between the arms and rides a little high.
When I jack it up all the way it has 18.25" arm to arm.
Regards,
Bill
Bill Wevers GMC49ers, GMC Western States
1975 Glenbrook - Manny Powerdrive, OneTon
455 F Block, G heads
San Jose
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| Re: What is the normal air bag length? [message #128545 is a reply to message #128541] |
Fri, 03 June 2011 22:40 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Senior Member |
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| RF_Burns wrote on Fri, 03 June 2011 20:19 |
Bill,
That is very interesting. That must mean there are 2 different styles of bogie arms.
Mine is an early 77 Palm Beach. what model is your coach?
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No way--I suspect people have differnt ideas what ride height is and where they measure.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] What is the normal air bag length? [message #128556 is a reply to message #128545] |
Fri, 03 June 2011 23:12 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Bob,
I have been taught the same as you say.
On Fri, Jun 3, 2011 at 8:40 PM, Bob de Kruyff <NEXT2POOL@aol.com> wrote:
>
>
> RF_Burns wrote on Fri, 03 June 2011 20:19
>> Bill,
>> That is very interesting. Â That must mean there are 2 different styles of bogie arms.
>> Mine is an early 77 Palm Beach. what model is your coach?
>
>
>
> No way--I suspect people have differnt ideas what ride height is and where they measure.
> --
> Bob de Kruyff
> 78 Eleganza
> Chandler, AZ
> _______________________________________________
> GMCnet mailing list
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--
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: What is the normal air bag length? [message #128574 is a reply to message #128446] |
Sat, 04 June 2011 01:32 |
bwevers
Messages: 598
Registered: October 2010
Location: San Jose
Karma: 5
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Senior Member |
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Bruce,
I remeasured the arm to arm distance.
I have 13" to 14". The right side is more than
the left side.
Regards,
Bill
Bill Wevers GMC49ers, GMC Western States
1975 Glenbrook - Manny Powerdrive, OneTon
455 F Block, G heads
San Jose
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