Leigh Harrison Air Bag (Spring) part number

Quote:
> The bigger Firestone bag that I am using is a 7659

Just to be clear, you’re using that bag on a Harrison quad bag setup?

How much difference does it make in your ride Larry?

Any downside to switching to that bag from “stock”?
Did you have a failure that prompted adding the spacer bolts as reinforcement?
Any other modifications necessary?
Could you mix the sizes, as in could I keep a good old one onboard as an emergency spare?

Thanks in advance
--
Nearing the summit of Mount Stupid In my new 1975 Eleganza II
 
> Quote:
> > The bigger Firestone bag that I am using is a 7659
>
> Just to be clear, you’re using that bag on a Harrison quad bag setup?
>
> How much difference does it make in your ride Larry?
>
> Any downside to switching to that bag from “stock”?
> Did you have a failure that prompted adding the spacer bolts as reinforcement?
> Any other modifications necessary?
> Could you mix the sizes, as in could I keep a good old one onboard as an emergency spare?
>
> Thanks in advance

The bags that you see in that were experimental and did not work out. They are from a company called "Airbagit". They are bigger than the stock
Harrison bags, and had all of the right fittings, fitting placement, and correct bolt pattern. But the end plates are made of aluminum, and when put
under the stress of 100psi at fulll up and the slight twist, the aluminum cracked and leaked all of the air overnight. So, I had to go back to
Firestone bags. Right now I am running a mix of the two different sizes with the bigger bag on the rear of both sides. No difference in ride just
slightly lower pressures. My intent is to change the smaller bags out to the "slightly" larger bag the next time I have the coach up for other
maintenance. So, pay no attention to those bags in the pics. I do carry an old bag in case of a blow out, but that is unlikely.

As to the adding the spacer bolts, there have been several instances of.....under extreme stress, where the Harrison brackets have reportedly bent.
(VERY RARE) Some GMC'rs have modified the brackets adding extra support. Adding bolts like I did seemed like a simple, easy way of reinforcing them.
Adding them won't hurt anything and might help if I should inadvertently over stress things. Just my gut level solution is all.
--
Larry
78 Royale w/500 Caddy
Menomonie, WI.
 
> What do you think about using the "7659" in the firestone brand? I just looked and "Airbagit" no longer carys the "7659" in whatever brand that
> was. Its cracking may have just been from inferior metal (like all the Chineese wheel bearings).

I actually went through several sets of the Airbagit bags. After sending them pics of the application I was using, they finally relented that the bags
were designed for a straight push, instead of the minor twist push that the GMC Harrison setup gave. So, they admitted that the bags would not work in
our situation. Would not take the bags back nor give me my money back on them, even though they said on first inquiry, seeing pics of the application,
and said the bags would work.

Personally I would not hesitate to use the Firestone 7659. They have steel end plates and are slightly bigger than the original, making pressures
slightly lower for the same carrying height. JMHO
--
Larry
78 Royale w/500 Caddy
Menomonie, WI.
 
When we designed the QuadraBag for Jim Bounds of COOP ,
We took the Ken Rose's design and moved the bags up higher and larger bag.
Result was that the handling remained the same as the Harrison, but with a
smoother ride.
Also we operate on 80psi vs 100 for the Harrison and handle the additional
weight that JimBounds wanted.

> > What do you think about using the "7659" in the firestone brand? I just
> looked and "Airbagit" no longer carys the "7659" in whatever brand that
> > was. Its cracking may have just been from inferior metal (like all the
> Chineese wheel bearings).
>
> I actually went through several sets of the Airbagit bags. After sending
> them pics of the application I was using, they finally relented that the
> bags
> were designed for a straight push, instead of the minor twist push that
> the GMC Harrison setup gave. So, they admitted that the bags would not work
> in
> our situation. Would not take the bags back nor give me my money back on
> them, even though they said on first inquiry, seeing pics of the
> application,
> and said the bags would work.
>
> Personally I would not hesitate to use the Firestone 7659. They have
> steel end plates and are slightly bigger than the original, making pressures
> slightly lower for the same carrying height. JMHO
> --
> Larry
> 78 Royale w/500 Caddy
> Menomonie, WI.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
>

--
Jim Kanomata ASE
Applied/GMC, Newark,CA
jimk
http://www.gmcrvparts.com
1-800-752-7502
 
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Applied GMC
Get your shine on at www.cruzingear.co

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