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| Re: question... [message #267823 is a reply to message #267820] |
Thu, 18 December 2014 20:53   |
George Beckman
Messages: 1085
Registered: October 2008
Location: Colfax, CA
Karma: 11
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Scooby Doo wrote on Thu, 18 December 2014 18:10Hello Fellow GMCers
My control valves to my air bags are leaking from the shaft.
My question is:
Have any of you out there taken them apart and rebuilt them before?
Is it an easy job, and straight forward?
Regular o-rings from my o-ring kit, or are they special for the application.
Looks like it would be an easy thing to do...and that is what makes me nervous LOL
Anyway, just wanted to reach out and check with everyone on the GMC.net before I pull them and start disassembling.
Thank you in advance. 
I have a 1976 Royale coachman transmode
G2
http://vid159.photobucket.com/albums/t154/g2photos/gmc_zpsopbekstl.mp4
JimK has rebuild kits. The O-Rings must be standard, but there are two sizes. I think it also has some sort of lube. I rebuilt mine with some success. I did find that if they were leaking, it was often because the little plungers were not returning (coming back out). If I let the coach down and left the valve in that position, I could not get it to build pressure unless I took off a knob and got the piston moving again.
Not to discourage you but after a year or two I bit the bullet and bought the JR. Slaten valves and wow, what a difference. The new valves move some air. (My '74 has a one gallon tank so the air is there.)
'74 Eleganza, SE, Howell + EBL
Best Wishes,
George
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 Re: question... [message #267824 is a reply to message #267820] |
Thu, 18 December 2014 21:16 |
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Scooby Doo
Messages: 92
Registered: May 2012
Location: Miami, Florida
Karma: 4
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Hello George,
Thank you for your reply.
I will call Jeff tomorrow at Sirums to see if he has the rebuild kit.
Also, thanks for your input on the J.R.Slaten valves.
I try to keep my GMC as stock as possible, only because it lasted this long (1976) and has held up so well over the years.
But, if I encounter problems, I will look into the upgrade.
I will also be adding new connectors to the back of the valves.
Am I correct to assume they are 1/4 NPT male X 1/4 air lines?
And, are the push ins OK, or should I go with the compression fittings on the air line side?
Thanks again for your input.
I am very grateful for the GMC.net community, you all are so very helpful.
Sincerely,
G2
Glenn & Elaine Gardner...
Miami, Florida...
1976 Royale (transmode)
TZE366V100733
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| Re: question... [message #267828 is a reply to message #267820] |
Thu, 18 December 2014 22:40 |
Luvn737s
Messages: 1106
Registered: June 2007
Karma: 2
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Senior Member |
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My experience exactly. New o-rings were OK, but the valves themselves could be warped and worn such that o-ring replacement isn't worth the hassle. The Slaten valves have made such an improvement in my satisfaction with the coach that I quickly forgot what they cost. Seeing it up at the same height I left it a month later is still a thrill. They are worth the hit on originality.
Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
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| Re: question... [message #267833 is a reply to message #267831] |
Fri, 19 December 2014 00:36 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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Senior Member |
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The 1/4" compression fittings are less likely to leak. I have re done my valves a number of times even replaced them with new when they were available . I have used sae o rings and metric o rings. The best fix is the Slaten valves . When you can afford to spend the extra bucks buy JR's valves and you won't need to mess with leaking valves anymore.
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: [GMCnet] question... [message #267841 is a reply to message #267828] |
Fri, 19 December 2014 05:19 |
Jim at the Co-op
Messages: 291
Registered: May 2014
Location: Orlando Florida
Karma: 2
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Senior Member |
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If you are talking about "original" valves with a big round black knob with
3 metal pistons sticking out the front of the valve when you remove the
rotator screw at the middle of the knob, there is no "center shaft'. If
it's leaking from one of the pistons that could be but to be honest -- with
so many seals, springs, plate gasket being so many places that a leak can
occur, you would be so far ahead of the game trying to make the Power level
system reliable I always pitch those &^%$#@ things in favor of the set of
valves JR Slaten offers. Each new valve has only 1 seal -- in the 20+
years I have been messing with these I have never seen a failure of his
system. It is an easy install, though I use something else, his kit uses
push-lock fittings. Installation could be done by a drunken sailor and
when it's in, you can cross off problems in the system relating to those 2
valves. The amount of time and the speculative positive outcome of messing
with those, get JR's valve kit and you will end up with a happy face.
Trust me on this one,
Jim Bounds
------------------------
On Thu, Dec 18, 2014 at 11:40 PM, Randy wrote:
>
> My experience exactly. New o-rings were OK, but the valves themselves
> could be warped and worn such that o-ring replacement isn't worth the
> hassle.
> The Slaten valves have made such an improvement in my satisfaction with
> the coach that I quickly forgot what they cost. Seeing it up at the same
> height I left it a month later is still a thrill. They are worth the hit
> on originality.
> --
> Randy
> 1973 26' Painted Desert
> Ahwatukee (Phoenix) AZ
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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 Re: question... [message #267944 is a reply to message #267820] |
Sat, 20 December 2014 19:19 |
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Scooby Doo
Messages: 92
Registered: May 2012
Location: Miami, Florida
Karma: 4
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Roy & Jim,
THANK YOU for your input.
Having a better understanding, and the overwhelming advice to get the JR Slaten valves, has made me consider doing so.
On our trip last week in our GMC, the compressor came on every hour or so, and we were happy nothing let loose and let the air out of our fun (trip)
Fixing things at home, and not the side of the road, sure is a better situation.
Yes, I would like to have piece of mind knowing all is well regarding our airbag system.
Thank you again, and thanks to all that have reached out to help us when we have questions & issues with our GMC.
I never feel alone.
I do hope in the future, I too will be able to help someone when the time comes.
Sincerely,
Glenn Gardner...G2photosmx.com
Glenn & Elaine Gardner...
Miami, Florida...
1976 Royale (transmode)
TZE366V100733
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| Re: question... [message #267947 is a reply to message #267944] |
Sat, 20 December 2014 20:27 |
djester
Messages: 145
Registered: January 2014
Location: Indianapolis
Karma: 0
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Senior Member |
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What Jim Bounds said. I couldn't be happier with the Slaten valves.
Dave
David A. Jester
Indianapolis, In
1975 Palm Beach
djester@comcast.net
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| Re: question... [message #267985 is a reply to message #267820] |
Sun, 21 December 2014 17:07 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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My coach had J R's setup when I bought it. Somewhat more substantial than the original, don't leak, highly recommended.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: question... [message #267997 is a reply to message #267820] |
Sun, 21 December 2014 22:48 |
Luvn737s
Messages: 1106
Registered: June 2007
Karma: 2
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Senior Member |
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Scooby-
Do you have a pressure gauge on the tank and cut off valves at the bags? You want to make sure the rest of the system is tight as well. Yes the old valves are usually the culprit, but for a couple bucks you can narrow down where the leaks are coming from.
I guess I thought a 76 would have Electrolevel, but apparently no.
Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
[Updated on: Mon, 22 December 2014 14:46] Report message to a moderator |
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| Re: question... [message #268002 is a reply to message #267997] |
Mon, 22 December 2014 05:31 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Senior Member |
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Johnny has a Crestmont like mine. I suspect it came without the dash valves and PO added JRs valves.
Luvn737s wrote on Sun, 21 December 2014 23:48Do you have a pressure gauge on the tank and cut off valves at the bags? You want to make sure the rest of the system is tight as well. Yes the old valves are usually the culprit, but for a couple bucks you can narrow down where the leaks are coming from.
I guess I thought a 76 would have Electrolevel, but apparently no.
C. Boyd
76 Crestmont
East Tennessee
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