Airbags, dry-rot

[david brady]

They're trying to say the cords are arranged in a herringbone style.



David,

'02 LXi, NC

timvasqz wrote:

I dont think the bags on our bus are a bag in a bag its just one
bag.

The cover inside and outside are the protective rubber keeping the

chords from the elements. Every rally I attend all you see are old

bags, something should be done. Even the description below is

confusing because ;a fabric is woven and ;bias is orientation at an

angel. if a fabric is situated on a bias , the angle is repeated

every 90deg. how could you arrange the second fabric on an oppisite

angle?



I need to go to a junk yard with a knife and check this out



http://www.airsprings.com.au/Airide_Definitions.cfm



Greg ofTim&Greg



--- In "WanderlodgeForum%40yahoogroups.com",
david brady "dmb993@..."

wrote:

>

> As other's have pointed out, there does appear to be an inner liner

> built into today's air springs. I copied this following from

Firestone's

> "Airide Design Guide":

>

> "An air spring is a carefully designed rubber and fabric flexible

member

> which contains a column of compressed air. The flexible member

itself

> does not provide force or support load; these functions are

performed

> by the column of air. Firestone air springs are highly engineered

> elastomeric

> flexible members with specifically designed metal end closures. The

> standard two-ply version is made up of four layers:

>

> (1) Inner Liner. An inner liner of calendered rubber.

> (2) Frst Ply. One ply of fabric reinforced rubber with the cords

> at a specific bias angle.

> (3) Second Ply. A second ply of fabric reinforced rubber with the

same bias

> angle laid opposite that of the first ply.

> (4) Outer Cover. An outer cover of calendered rubber."

>

> David Brady

> '02 LXi, NC

>

>

> Pete Masterson wrote:

> >

> > I note that I've twice had competent service providers
"carefully

> > inspect" the condition of my coach, and neither have
indicated

any

> > concern about the air bags. They don't look horrible, but do
have

some

> > checking and cracks on the outside. I take it that it's
normal

for the

> > age of the bags.

> >

> >

> > While I have no way of knowing (I'm at least the 3rd owner of


this

> > coach), I doubt that any of the POs had the air bags
replaced.

The

> > immediate PO never mentioned air bags, and the (incomplete)
set

of

> > receipts he provided don't mention them either.

> >

> > Pete Masterson

> > '95 Blue Bird Wanderlodge WBDA 42 (For Sale)

> > <http://www.aeonix.biz/BBforsale.html


> > <http://www.aeonix.biz/BBforsale.html>>

> > El Sobrante CA

> > aeonix1@... <"aeonix1@"...>

> >

> >

> >

> >

> > On Feb 28, 2009, at 10:57 AM, Wayne Kotila wrote:

> >

> >> David, I have a 1985 PT40 that I have owned for 12 years
and the

air

> >> bags have looked that way as long as I have owned it.
When I

bought

> >> the coach 12 years ago it had about 100,000 miles on it,
now it

has

> >> about 160,000. I am not shure but I wonder if the bags
have a

thick

> >> outer protective layer that we see cracking on the
outside and

the

> >> actual bag sealing the air is a thinner more plyable
rubber on

the

> >> inside?

> >> Wayne

> >>

> >> ----------------------------------------------------------

-------

> >> *From:* david brady ...>>

> >> *To:* "WanderlodgeForum%40yahoogroups.com"


> >>

> >> *Sent:* Friday, February 27, 2009 11:37:06 AM

> >> *Subject:* [WanderlodgeForum] Airbags, dry-rot

> >>

> >> I was inspecting the coach the other day and noticed

> >> that all my airbags are checked and cracked, similar

> >> to the appearance of a dry-rotted tire. The bags are

> >> 7.5 years old. Anyone have a feel for how long bags

> >> should last, and how severely checked they can become

> >> before replacement is necessary? I have visions of

> >> installing new bags only to find the same checkng one

> >> year from now.

> >>

> >> (Planning a cross country trip and want to be prepared).

> >>

> >> David Brady

> >> '02 LXi, NC

> >>

> >

> >

> > ----------------------------------------------------------

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2/26/2009 2:51 PM

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