| Re: [GMCnet] Height Level Valve [message #128083] |
Tue, 31 May 2011 12:34  |
KB
Messages: 1262
Registered: September 2009
Karma: 0
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Wow, I'm always amazed at how other people pipe up with questions here
that just happen to be about something I'm facing...
We were working on our ride height yesterday. I'd already replaced
both leveling valves with new ones from JimK because the old ones were toast.
But, we still can't get the rear of the coach high enough. It's always about
1 to 1.5 inches too low. Judging by the drag damage on the rear frame,
this has long been a problem on this coach.
I can only guess that the mounting plates in the fender are in the wrong place.
My choices, I think are re-mount the valves, or use an adjustable link.
thanks,
Karen (now off to search for pictures of the adjustable links...)
1975 26' tail dragger
1973 23' yard ornament
>
> NOTE: Dave also sells adjustable links that replace the fixed length ones.
>
> Ken Henderson also sells adjustable length links:
>
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Karen
1975 26'
San Jose, CA
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| Re: [GMCnet] Height Level Valve [message #128086 is a reply to message #128083] |
Tue, 31 May 2011 13:41  |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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http://www.gmcmhphotos.com/photos/showphoto.php?photo=22208&title=adjustable-rear-ride-h&cat=4821
http://goo.gl/MlqY6
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI+ & EBL
www.gmcwipersetc.com
On Tue, May 31, 2011 at 1:34 PM, KB <kab7@sonic.net> wrote:
...
> My choices, I think are re-mount the valves, or use an adjustable link.
>
> thanks,
> Karen (now off to search for pictures of the adjustable links...)
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Height Level Valve [message #128087 is a reply to message #128083] |
Tue, 31 May 2011 13:45 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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Karen, those adjustable links are just what the doctor ordered to fine tune
ride height. I have them on my coach with EL II and they work with other
systems too.
Jim Hupy
Salem, OR
78 GMC Royale 403
On Tue, May 31, 2011 at 10:34 AM, KB <kab7@sonic.net> wrote:
> Wow, I'm always amazed at how other people pipe up with questions here
> that just happen to be about something I'm facing...
>
> We were working on our ride height yesterday. I'd already replaced
> both leveling valves with new ones from JimK because the old ones were
> toast.
> But, we still can't get the rear of the coach high enough. It's always
> about
> 1 to 1.5 inches too low. Judging by the drag damage on the rear frame,
> this has long been a problem on this coach.
>
> I can only guess that the mounting plates in the fender are in the wrong
> place.
> My choices, I think are re-mount the valves, or use an adjustable link.
>
> thanks,
> Karen (now off to search for pictures of the adjustable links...)
>
> 1975 26' tail dragger
> 1973 23' yard ornament
>
>
>
> >
> > NOTE: Dave also sells adjustable links that replace the fixed length
> ones.
> >
> > Ken Henderson also sells adjustable length links:
> >
>
>
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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| Re: [GMCnet] Height Level Valve [message #128098 is a reply to message #128092] |
Tue, 31 May 2011 16:35 |
 |
USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Gord,
First of all I prescribe to the theory that General Motors had engineers on
the design team were competent and knew what they were doing when they
designed this vehicle. In fact I subscribe to that theory for just about any
vehicle I work on. Obviously there have been exceptions to his principle,
however, it is a good "rule of thumb." When I restore a vehicle I do my best
to bring it back to the way it was built originally but will incorporate any
improved components. Having said this I guess I qualify as "others here with
lots of valve experience could size up my theory" as I have replaced /
rebuilt the entire Power Level System in both my Avions. They both have:
JR's valves, all new hoses from McMaster Carr, new Viair 480C compressors,
cleaned air tanks, new pressure control switches from JimK, rebuilt ride
height control valves from D. Lenzi, DOT truck air fittings, etc.
http://www.gmcmhphotos.com/photos/showphoto.php?photo=28386
In response to your email:
QUERY: I think someone would do well to design up a bracket that mounts the
valve to the chassis and not the fender well.
RESPONSE: Waste of time, money, and effort. I will concede that the OEM
mounting through the wheel well with steel bolts sucks as they rust and make
it damn near impossible to replace the valve. Here's the stainless steel
plate I made up to mount the valves.
http://www.gmcmhphotos.com/photos/showphoto.php?photo=28377
These have been in service for three years and have not budged.
QUERY: I wonder how much valve action happens due to chassis versus body
variances while in motion?
RESPONSE: I wouldn't have a clue and I wouldn't bother trying to find out as
the ride height control valve arms are subjected to constant movement as the
bogies move up and down due to road conditions. I doubt any relative body /
frame motion is relevant.
QUERY: I wonder if worn out rubber strips contribute to valves going out of
whack?
RESPONSE: Obviously if the ride height is set with worn out rubber strips
that are 1/4" think and you install new blocks from Bert & Fay Curtis that
are 3/4" thick you have to re-adjust the ride height accordingly.
Regards,
Rob - "Who DOESN'T belive in re-inventing the wheel" - M.
USAussie - Downunder
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Gord H
Sent: Wednesday, June 01, 2011 5:35 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Height Level Valve
I was just pondering this issue while out with the saw and grinder. :d
I think someone would do well to design up a bracket that mounts the valve
to the chassis and not the fender well. I wonder how much valve action
happens due to chassis versus body variances while in motion? I wonder if
worn out rubber strips contribute to valves going out of whack? (Well,
that's a no-brainer - if the strip is gone and the body falls what, a half
or 3/4 inch, that can't be so good now can it).
I didn't study the valves as to what's happening when (i.e. up or down) -
and mine are long gone now so maybe one of the others here with lots of
valve experience could size up my theory.
Food for thought - hopefully. ;)
Gord
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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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