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Re: [GMCnet] Required air pressure for quad bag rear suspension [message #329346 is a reply to message #329344] Tue, 20 February 2018 19:39 Go to previous messageGo to previous message
USAussie is currently offline  USAussie   United States
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma:
Senior Member
Terry,

Jim K sells rebuild kits for the OEM Powerlevel valves:

http://www.appliedgmc.com/prod.itml/icOid/953

Regards,
Rob M.
The Pedantic Mechanic
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808


-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Terry
Sent: Wednesday, February 21, 2018 12:31 PM
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] Required air pressure for quad bag rear suspension

The GMC right side used to fall down at 15 degrees F. This was when I winterized it and allowed it to get cold inside as well. It
was 23 degrees
inside when it was 15 outside. Before I put a block under the right rear, I learned valuable lesson about door not opening enough
for me to get in and
correct the situation :lol: Could not find leak after pumping system back up while running engine and compressor. Surmised it was
the supply line to
the right bag, and the control valve also leaking system air to the bag when there was enough pressure differential. Bags and system
held up all the
rest of the year. Found problems next temp drop(using leak check that doesn't freeze)...PLASTICS...did not warm up engine or
interior, used external
compressor for air in system. In addition to the internal valve leak, the plastic hose compression type connection for the right bag
leaked when it
got that cold. Fixed the hose with warmth followed with a little bit of disassembly and rework. Still haven't found the rebuild kit
for the valves,
but was informed of JR's replacements. I'm too cheap right now for new valves, and have further system mods being added on which may
get incorporated
into that system. There are some compression unions under the coach that didn't leak back then, but after they got blasted with
exhaust leakage last
summer (muffler explosion) they leaked to the point that the system only stayed up for about 15 minutes. Was able to stop leakage by
tightening, but
reworked 2 of the connections to be sure. Those connections are not supposed to be there, I can tell by the way the hoses ended up
being routed. Muff
explosion due to ignition cutoff from electrical spike must have happened to the P.O. also :? The temperature changes really affect
the plastics...all
of them...


--
Terry Kelpien

ASE Master Technician

73 Glacier 260

Smithfield, Va.


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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426
 
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