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[GMCnet] Leaky bag [message #89398]

Mon, 21 June 2010 09:17

hdforge

Messages: 27
Registered: June 2010

Karma: 0

Junior Member

Probably been addressed thousands of times, but I didn't see any searchable
history on the list site. One side had been leaking despite two new shut
off valves, tons of sealing tape and a new o ring. Do bags sometimes
leak? It is an old one, but I thought the only failure mode was blowing up. It
leaks down after about 3-4 hours, that corner is supported by a wood block
when parked.
TIA

Randy Cohen
76 eleganza

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Re: [GMCnet] Leaky bag [message #89399 is a reply to message #89398]

Mon, 21 June 2010 09:30

emerystora

Messages: 4442
Registered: January 2004

Karma: 13

Senior Member

On Jun 21, 2010, at 8:17 AM, hdforge@aol.com wrote:

>
> One side had been leaking despite two new shut
> off valves, tons of sealing tape and a new o ring. Do bags sometimes
> leak? It is an old one, but I thought the only failure mode was
> blowing up.
>
Yes, they can leak. I had a sharp pebble get between a fold and it cut
a pinhole into the bag.

Try using some soap solution to see if you have any bubbles which show
a leak. Or you can remove the bag, inflate it, and check it in a tank
or bathtub.

Emery Stora

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Re: [GMCnet] Leaky bag [message #89400 is a reply to message #89398]

Mon, 21 June 2010 09:32

Tripp 33

Messages: 99
Registered: October 2009

Karma: 0

Member

Randy,

I have a 78 and 1 of the original bags kept leaking so I bit the bullet and changed out both sides completely. When I took the "bad bag" out I noticed it has a heavy wear mark where folds over itself. Since I am in the rubber industry I could have easily fixed it but it was after I had ordered the new bags.

I would suggest taking the bag/cones off first to see if it might have some damage.

Also, people LOVE the teflon tape but I have had much better luck with teflon paste. It is a little more expensive but it is a very good seal for pneumatic applications.

Another option could be that you have leaky valves and your bag is in perfectly good shape!?!?

I hope you find a good solution to your problem.

Jeff

Toledo, OH

1978 Transmode

WILD ROVER

> From: hdforge@aol.com
> Date: Mon, 21 Jun 2010 10:17:43 -0400
> To: gmclist@temp.gmcnet.org
> Subject: [GMCnet] Leaky bag
>
> Probably been addressed thousands of times, but I didn't see any searchable
> history on the list site. One side had been leaking despite two new shut
> off valves, tons of sealing tape and a new o ring. Do bags sometimes
> leak? It is an old one, but I thought the only failure mode was blowing up. It
> leaks down after about 3-4 hours, that corner is supported by a wood block
> when parked.
> TIA
>
> Randy Cohen
> 76 eleganza
>
>
>
>
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

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Re: [GMCnet] Leaky bag [message #89401 is a reply to message #89398]

Mon, 21 June 2010 09:34

Mr ERFisher

Messages: 7117
Registered: August 2005

Karma: 2

Senior Member

> Probably been addressed thousands of times, but I didn't see any searchable
> history on the list site. One side had been leaking despite two new shut
> off valves, tons of sealing tape and a new o ring.
>

here are some things to read

http://gmcmotorhome.info/levelsch.htm#one

and

some things to search
http://gmcmotorhome.info/rear.html#BAGS

gene

--
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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