GMCforum: GMCnet » Required air pressure for quad bag rear suspension

Home » Public Forums » GMCnet » Required air pressure for quad bag rear suspension

Show: Today's Messages :: Polls :: Message Navigator

Re: Required air pressure for quad bag rear suspension [message #329220 is a reply to message #328867]

Fri, 16 February 2018 20:48

gibsongo

Messages: 116
Registered: October 2012
Location: Montreal West, Quebec, Ca...

Karma:

Senior Member

No misinformation intended...and none conveyed if you take the time to read all the string carefully. New quad bag system, new Viair pump, all new tubing and fittings, new JR Slayton control valves - all installed 12 months ago by an experienced GMC mechanic. The system will hold air for weeks most of the year, but in very cold weather (-20C and colder), it just doesn't. Your experience may differ, but I am relating what happened out in the driveway 5 or 6 times in a cold by historic records late December and January when I would start the engine and get the rear end up to the proper travel level. Now of course, the air could be leaking from any number of fittings, but the "spray soapy water" diagnostic just won't work - the water would freeze long before any bubbles appeared. My bet is on the bags. The fact that the coach lost air over the 12 hours it spent on the flatbed with the shutoff valves closed at the rear suspension manifold (as recommended by several on this forum) tends to substantiate this conclusion.

Gordon Gibson 1976 23" Norris Upfit Montreal West, Quebec, Canada

Report message to a moderator

[Message index]

		Required air pressure for quad bag rear suspension By: gibsongo on Tue, 06 February 2018 09:10
		Re: Required air pressure for quad bag rear suspension By: Bullitthead on Tue, 06 February 2018 09:27
		Re: Required air pressure for quad bag rear suspension By: gibsongo on Tue, 06 February 2018 09:48
		Re: [GMCnet] Required air pressure for quad bag rear suspension By: jimk on Tue, 06 February 2018 09:45
		Re: Required air pressure for quad bag rear suspension By: Larry on Tue, 06 February 2018 09:58
		Re: Required air pressure for quad bag rear suspension By: gibsongo on Tue, 06 February 2018 10:01
		Re: Required air pressure for quad bag rear suspension By: gibsongo on Tue, 06 February 2018 10:09
		Re: [GMCnet] Required air pressure for quad bag rear suspension By: James Hupy on Tue, 06 February 2018 10:23
		Re: Required air pressure for quad bag rear suspension By: Larry on Tue, 06 February 2018 11:01
		Re: [GMCnet] Required air pressure for quad bag rear suspension By: USAussie on Tue, 06 February 2018 15:42
		Re: [GMCnet] Required air pressure for quad bag rear suspension By: James Hupy on Tue, 06 February 2018 15:52
		Re: [GMCnet] Required air pressure for quad bag rear suspension By: Carl S. on Tue, 06 February 2018 16:09
		Re: [GMCnet] Required air pressure for quad bag rear suspension By: USAussie on Tue, 06 February 2018 16:49
		Re: Required air pressure for quad bag rear suspension By: RF_Burns on Tue, 06 February 2018 17:37
		Re: Required air pressure for quad bag rear suspension By: gibsongo on Tue, 06 February 2018 22:52
		Re: Required air pressure for quad bag rear suspension By: RF_Burns on Wed, 07 February 2018 05:58
		Re: Required air pressure for quad bag rear suspension By: Larry on Wed, 07 February 2018 08:10
		Re: [GMCnet] Required air pressure for quad bag rear suspension By: k2gkk on Wed, 07 February 2018 09:50
		Re: [GMCnet] Required air pressure for quad bag rear suspension By: Larry on Wed, 07 February 2018 10:16
		Re: [GMCnet] Required air pressure for quad bag rear suspension By: johnd01 on Wed, 07 February 2018 12:16
		Re: [GMCnet] Required air pressure for quad bag rear suspension By: Ken Burton on Wed, 07 February 2018 13:08
		Re: [GMCnet] Required air pressure for quad bag rear suspension By: emerystora on Wed, 07 February 2018 14:06
		Re: Required air pressure for quad bag rear suspension By: JohnL455 on Wed, 07 February 2018 08:02
		Re: Required air pressure for quad bag rear suspension By: 77Royale on Wed, 07 February 2018 08:31
		Re: Required air pressure for quad bag rear suspension By: TR 1 on Wed, 07 February 2018 08:48
		Re: Required air pressure for quad bag rear suspension By: gibsongo on Thu, 15 February 2018 19:28
		Re: Required air pressure for quad bag rear suspension By: Ken Burton on Thu, 15 February 2018 23:02
		Re: [GMCnet] Required air pressure for quad bag rear suspension By: jimk on Fri, 16 February 2018 12:03
		Re: Required air pressure for quad bag rear suspension By: gibsongo on Fri, 16 February 2018 20:48
		Re: Required air pressure for quad bag rear suspension By: Ken Burton on Sat, 17 February 2018 05:02
		Re: [GMCnet] Required air pressure for quad bag rear suspension By: Tangerine on Sat, 17 February 2018 10:38
		Re: [GMCnet] Required air pressure for quad bag rear suspension By: jimk on Sat, 17 February 2018 11:00
		Re: [GMCnet] Required air pressure for quad bag rear suspension By: k2gkk on Sat, 17 February 2018 14:54
		Re: [GMCnet] Required air pressure for quad bag rear suspension By: Tangerine on Sun, 18 February 2018 09:35
		Re: [GMCnet] Required air pressure for quad bag rear suspension By: jimk on Sun, 18 February 2018 12:42
		Re: [GMCnet] Required air pressure for quad bag rear suspension By: James Hupy on Sun, 18 February 2018 12:56
		Re: [GMCnet] Required air pressure for quad bag rear suspension By: Tangerine on Mon, 19 February 2018 05:37
		Re: [GMCnet] Required air pressure for quad bag rear suspension By: Bullitthead on Tue, 20 February 2018 19:31
		Re: [GMCnet] Required air pressure for quad bag rear suspension By: Bullitthead on Tue, 20 February 2018 19:36
		Re: [GMCnet] Required air pressure for quad bag rear suspension By: jimk on Tue, 20 February 2018 20:24
		Re: [GMCnet] Required air pressure for quad bag rear suspension By: Bullitthead on Tue, 20 February 2018 20:52
		Re: [GMCnet] Required air pressure for quad bag rear suspension By: jimk on Wed, 21 February 2018 00:14
		Re: [GMCnet] Required air pressure for quad bag rear suspension By: bdub on Wed, 21 February 2018 06:12
		Re: [GMCnet] Required air pressure for quad bag rear suspension By: Tangerine on Thu, 22 February 2018 07:36
		Re: [GMCnet] Required air pressure for quad bag rear suspension By: USAussie on Tue, 20 February 2018 19:39
		Re: Required air pressure for quad bag rear suspension By: NextGenGMC on Sat, 17 February 2018 12:51

Previous Topic:	What Canadian do in the Winter
Next Topic:	[GMCnet] When did the horse collar fan shroud end?

Goto Forum:

-=] Back to Top [=-

Current Time: Sat May 11 09:42:36 CDT 2024

Total time taken to generate the page: 0.01473 seconds