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Home » Public Forums » GMCnet » Re: [GMCnet] air pressure for Quadra Bag Rear Suspension System
Re: [GMCnet] air pressure for Quadra Bag Rear Suspension System [message #239004] Thu, 06 February 2014 16:37 Go to previous message
KB is currently offline  KB   United States
Messages: 1262
Registered: September 2009
Karma:
Senior Member
> For the record Dave Lenzi runs the Harrison system on his coach and has replaced one of the bags it comes with (Firestone P/N
> W01-358-3400 with Firestone P/N W01-358-7350) The 7350 is the bag used on the Q-Bag system. The 7350 is a larger OD bellows (7.44")
> vs the 3400 bellows (7.25"). He did that to reduce the amount of pressure required to get his Coachman Royale to ride height.
> Anticipating the next question; according to Dave you cannot run two 7350's on the Harrison system.

Correction: having been down this road, for the harrison system you need
air bags with offset fill ports. The ones on the q-bag have the fill in the center.
The equivalent larger bags for the harrison system are: W21-358-7325

Also, all the references I've seen show the Q-bag uses W01-358-7325.
I'm not finding any hits for W01-358-7350 at the various truck spring sites;
not sure it's a valid number.

I see no reason why you can't put two of these on the harrison system to
replace both of the smaller bags he supplied originally. I currently have
the bigger bags only on the mid wheels, but will probably replace the rear
ones too at some point.

jwid,

Karen
1973 23'
1975 26'

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Karen 1975 26' San Jose, CA
 
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