Home » Public Forums » GMCnet » Leveling System
 Leveling System [message #191025] |
Wed, 21 November 2012 18:58  |
 |
Scooby Doo
Messages: 92
Registered: May 2012
Location: Miami, Florida
Karma: 4
|
Member |
|
|
Hello Fellow GMC.neters,
Its been awhile since I have wrote in.
Things have been well and no problems :0)
I have still been lurking the forum weekly, just to stay on top of things.
I sure do appreciate you being there.
The Mrs. & I are heading up to the Okeechobee, Fl. area for a long weekend of boondock camping.
I have been leaving the GMC on 4X8s and letting the air out of the bags while it is not in use. (Was this a bad idea ?)
OK, now my question.
When I turned the key on and the compressor was filling the bags my "Low Air" light on the dash board stayed on (lit) even after it was all filled up. It also seems as though the GMC filled up higher than it normally does.
I am thinking that it is not sending the signal that all is as it is supposed to be.
What is supposed to be happening when it is working properly, and what should I be checking to see if all is well ?
Thank you in advance & Happy Thanksgiving to all.
If all goes well, I will be spending mine out in the woods.
Sincerely,
Glenn Gardner...Scooby Doo 
Glenn & Elaine Gardner...
Miami, Florida...
1976 Royale (transmode)
TZE366V100733
|
|
|
|
 Re: Leveling System [message #191432 is a reply to message #191025] |
Tue, 27 November 2012 16:57  |
|
Scooby Doo
Messages: 92
Registered: May 2012
Location: Miami, Florida
Karma: 4
|
Member |
|
|
Hello GMC.netters,
Its been a week, and I finally have figured out what the problem might be with my GMC leveling system.
After a few trips around all the connections with my bottle of soapy water, I discovered that air is leaking out of the top of what looks like a pressure sensor on the side of my air tank.
Since it has electrical wires coming out of it I assume that was why my "low air" light on the dash was coming on.
Air is coming out at the electrical connection on the top of the switch itself.
Photo:
My new question is : Where can I find a NEW replacement for this item ?
Or, will I have to get a used one from another GMC.
I will be headed out of town again this Thursday and be stopping by Alex Sirum GMC to say hello, as I do when in the neighborhood .
So, if getting a used one is my best option, I will get one from Jeff Sirum.
What are your thoughts, out there ?
Thanks again for being there.
Sincerely,
Glenn Gardner...G2photosmx.com
Glenn & Elaine Gardner...
Miami, Florida...
1976 Royale (transmode)
TZE366V100733
|
|
|
|
| Re: [GMCnet] Leveling System [message #191435 is a reply to message #191432] |
Tue, 27 November 2012 17:49 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
|
Senior Member |
|
|
Glen, mine has had the compressor replaced and the switch - it is a standard Tractor Supply item, a pressure switch for a compressor. Wrap a bit of teflon tape or paint a bit of sealer on the threads before you install the new one. They're adjustable, set it to open around 120 PSI if you have stock bags on your coach. Mine is on a tee with a guage on the other end of the tee - makes it easy to set and see what the system uis doing. If you're tight for space, the switch can be extended on a piece of pipe with fittings as necessary. And when you finish, again do the soap test and tighten any leaks.
--johnny
'76 23' transmode norris
'76 palm beach
From: Glenn Gardner <G2photos@aol.com>
To: gmclist@temp.gmcnet.org
Sent: Tuesday, November 27, 2012 5:57 PM
Subject: Re: [GMCnet] Leveling System
Hello GMC.netters,
Its been a week, and I finally have figured out what the problem might be with my GMC leveling system.
After a few trips around all the connections with my bottle of soapy water, I discovered that air is leaking out of the top of what looks like a pressure sensor on the side of my air tank.
Since it has electrical wires coming out of it I assume that was why my "low air" light on the dash was coming on.
Air is coming out at the electrical connection on the top of the switch itself.
Photo:
My new question is : Where can I find a NEW replacement for this item ?
Or, will I have to get a used one from another GMC.
I will be headed out of town again this Thursday and be stopping by Alex Sirum GMC to say hello, as I do when in the neighborhood .
So, if getting a used one is my best option, I will get one from Jeff Sirum.
What are your thoughts, out there ?
Thanks again for being there.
Sincerely,
Glenn Gardner...G2photosmx.com :)
--
Glenn & Elaine Gardner...
Miami, Florida...
1976 Royale (transmode)
TZE366V100733
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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
|
|
|
|
|
|
| Re: Leveling System [message #191440 is a reply to message #191438] |
Tue, 27 November 2012 18:34 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
|
Senior Member |
|
|
Sir: this is the low air warning light switch. It operates the low air light only, nothing to do with air pressure control. The leak would cause the compressor to run longer but not build more pressure. The pressure switch is mounted to the tank and a set of relays inside a square box with wires going to the compressor. It can be be adjusted but if it is acting up I would recomend replacing. It can also leak. Keep looking for those air leaks till it holds air. It can be done.
C. Boyd
76 Crestmont
East Tennessee
|
|
|
|
 Re: Leveling System [message #191446 is a reply to message #191025] |
Tue, 27 November 2012 20:35 |
|
Scooby Doo
Messages: 92
Registered: May 2012
Location: Miami, Florida
Karma: 4
|
Member |
|
|
Mr. Bridges & Mr. Boyd,
Thank you for your comments, and sharing your knowledge.
I now completely understand my situation.
I will go to Napa and pick up a new warning light air switch.
For one, I am trying to keep my GMC stock as I can, and two, my current air switch is leaking on the metal part on the top.
So, I will want to fix it so it operates just as it did 36 years ago.
Once again, Thank you GMC.netters for sharing your knowledge.
You have made owning a GMC Motorhome that much more pleasurable.
Sincerely,
G2
Glenn Gardner...G2photosmx.com
Glenn & Elaine Gardner...
Miami, Florida...
1976 Royale (transmode)
TZE366V100733
|
|
|
|
| Re: [GMCnet] Leveling System [message #191461 is a reply to message #191446] |
Wed, 28 November 2012 06:34 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
|
Senior Member |
|
|
Pay attention to Boyd, it seems a PO wired mine differently from stock. I have only the compressor switch, and the LOW AIR light is run off it. If you have a seperate switch for the light, and it's leaking, replace it.
--johnny
'76 23' transmode norris
'76 palm beach.
From: Glenn Gardner <G2photos@aol.com>
To: gmclist@temp.gmcnet.org
Sent: Tuesday, November 27, 2012 9:35 PM
Subject: Re: [GMCnet] Leveling System
Mr. Bridges & Mr. Boyd,
Thank you for your comments, and sharing your knowledge.
I now completely understand my situation.
I will go to Napa and pick up a new warning light air switch.
For one, I am trying to keep my GMC stock as I can, and two, my current air switch is leaking on the metal part on the top.
So, I will want to fix it so it operates just as it did 36 years ago. :)
Once again, Thank you GMC.netters for sharing your knowledge.
You have made owning a GMC Motorhome that much more pleasurable.
Sincerely,
G2
Glenn Gardner...G2photosmx.com
--
Glenn & Elaine Gardner...
Miami, Florida...
1976 Royale (transmode)
TZE366V100733
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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
|
|
|
|
| Re: [GMCnet] Leveling System [message #191462 is a reply to message #191440] |
Wed, 28 November 2012 06:32 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
|
Senior Member |
|
|
Mine has not a seperate switch.... the light tracks the compressor.
--johnny
'76 23' transmode norris
'76 palm beach
From: Charles Boyd <covered-wagon@comcast.net>
To: gmclist@temp.gmcnet.org
Sent: Tuesday, November 27, 2012 7:34 PM
Subject: Re: [GMCnet] Leveling System
Sir: this is the low air warning light switch. It operates the low air light only, nothing to do with air pressure control. The leak would cause the compressor to run longer but not build more pressure. The pressure switch is mounted to the tank and a set of relays inside a square box with wires going to the compressor. It can be be adjusted but if it is acting up I would recomend replacing. It can also leak. Keep looking for those air leaks till it holds air. It can be done.
C Boyd wrote on Tue, 27 November 2012 19:20
> Sir: it is stndard big truck part. Any dealer or bigtruck parts store, truck stop, NAPA.
> http://www.napaonline.com/Catalog/CatalogItemDetail.aspx?R=MBIBE13241_0214431784
> Warning light is on till ~70 lb then shuts off.
>
>
>
>
>
>
> My new question is : Where can I find a NEW replacement for this item ?
--
C. Boyd
76 Crestmont
East Tennessee
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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
|
|
|
|
 Re: Leveling System [message #191531 is a reply to message #191025] |
Wed, 28 November 2012 17:35 |
|
Scooby Doo
Messages: 92
Registered: May 2012
Location: Miami, Florida
Karma: 4
|
Member |
|
|
So, I went to Napa and picked up a :
Part Number: MBI BE13241
Product Line: Midland Brake Products
Removed my current switch and then realized that the treads on the Napa switch was different from the switch that is on my GMC.
The one on the GMC is 1/4 NPT male threads.
The Napa part is a smaller size, and a fine thread.
I don't know what it is ?
The Napa website and the bag it came in, had no information. 
Since I am leaving town in the morning, I decided to epoxy the whole top of my old switch and then re- installed it.
I have not tried it out only because I am letting the epoxy completely cure.
I guess I'll know in the morning.
When I get home next week, I will try and find a switch that has a 1/4 NPT male thread on it.
Also the old (current switch has an adjustable screw on it) The napa one is not adjustable and I do not know what pressure it is set to close.
If anyone knows a link to the correct switch, please send it.
Thank you all again for your help & support. 
Sincerely,
G2
Glenn Gardner...G2photosmx.com
http://i159.photobucket.com/albums/t154/g2photos/IMG_3089.jpg[/img]
Glenn & Elaine Gardner...
Miami, Florida...
1976 Royale (transmode)
TZE366V100733
[Updated on: Wed, 28 November 2012 17:43] Report message to a moderator |
|
|
|
| Re: [GMCnet] Leveling System [message #191549 is a reply to message #191531] |
Wed, 28 November 2012 18:28 |
 |
USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
|
Senior Member |
|
|
Glenn,
The threads on the switch are 1/8 NPT. All you have to do is get a 1/4 NPT to 1/8 NPT reducer. They should have one at the Napa
store, if not Home Depot or Lowes will.
Regards,
Rob M.
-----Original Message-----
From: Glenn Gardner
So, I went to Napa and picked up a :
Part Number: MBI BE13241
Product Line: Midland Brake Products
Removed my current switch and then realized that the treads on the Napa switch was different from the switch that is on my GMC.
The one on the GMC is 1/4 NPT male threads.
The Napa part is a smaller size, and a fine thread.
I don't know what it is ?
The Napa website and the bag it came in, had no information. :x
Since I am leaving town in the morning, I decided to epoxy the whole top of my old switch and then re- installed it.
I have not tried it out only because I am letting the epoxy completely cure.
I guess I'll know in the morning.
When I get home next week, I will try and find a switch that has a 1/4 NPT male thread on it.
Also the old (current switch has an adjustable screw on it) The napa one is not adjustable and I do not know what pressure it is set
to close.
If anyone knows a link to the correct switch, please send it.
Thank you all again for your help & support. :p
Sincerely,
G2
Glenn
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Re: Leveling System [message #191614 is a reply to message #191599] |
Thu, 29 November 2012 10:32 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
|
Senior Member |
|
|
| Scooby Doo wrote on Thu, 29 November 2012 08:33 |
OK,
Its 9am and I am checking my e-mails before I head out.
I am a little confused on one of the last two posts.
1) If I put a plug in where my switch is, How would I be able to put a wire on the pressure the switch (if it is removed)
Or, do you mean another pressure switch.
I think I like the idea of putting a leg to the compressor motor and one to ground, again this way the light would come on only when the compressor is running (any thoughts?)
2) thank you Dan & Kosier for replying to me.
I am off to the races !
Have a great weekend,
G2
|
If I understand your system correctly (it is different than mine) there are two pressure switches. One switch controls when the compressor runs and shuts off the compressor when the tank is full. We will call that SWITCH ONE. The second switch is the one you are working with and it only turns off and on a light on the dash. (My 1976 does not have that switch.) So remove the second switch and put a plug in the hole where it screwed in.
Now if you still want to have a light working, at the compressor control switch (SWITCH ONE) wire the light direct to the terminal supplying power to the motor.
OR... there is a second set of contacts on SWITCH ONE. Simply move the wires from SWITCH TWO to SWITCH ONE on the available the second set of contacts.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
|
|
|
|
|
|
|
|
| Re: [GMCnet] Leveling System [message #191690 is a reply to message #191617] |
Fri, 30 November 2012 02:28 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
|
Senior Member |
|
|
| emerystora wrote on Thu, 29 November 2012 10:40 |
On Nov 29, 2012, at 9:32 AM, Ken Burton <n9cv@comcast.net> wrote:
> If I understand your system correctly (it is different than mine) there are two pressure switches. One switch controls when the compressor runs and shuts off the compressor when the tank is full. We will call that SWITCH ONE. The second switch is the one you are working with and it only turns off and on a light on the dash. (My 1976 does not have that switch.) So remove the second switch and put a plug in the hole where it screwed in.
>
> Now if you still want to have a light working, at the compressor control switch (SWITCH ONE) wire the light direct to the terminal supplying power to the motor.
>
HOWEVER, if you want to use the telltale light in the dash then you cannot connect it to a terminal supplying power. It needs a ground. That is why I suggested connecting the wire to one of the unused contacts (on what you are calling (switch one) and then connect the other unused contact to GROUND.
Emery Stora
> OR... there is a second set of contacts on SWITCH ONE. Simply move the wires from SWITCH TWO to SWITCH ONE on the available the second set of contacts.
> --
> Ken Burton - N9KB
> 76 Palm Beach
> Hebron, Indiana
|
Thanks Emery. Since I have neither a working telltale or the additional switch, I was not thinking about switching Hot (+12) vs. switching Ground when I made that posting.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
|
|
|
|
| Re: [GMCnet] Leveling System [message #191719 is a reply to message #191435] |
Fri, 30 November 2012 10:09 |
 |
mike miller
Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon
Karma: 0
|
Senior Member |
|
|
| Johnny Bridges wrote on Tue, 27 November 2012 15:49 |
... Wrap a bit of teflon tape or paint a bit of sealer on the threads before you install the new one. ...
|
Just a heads-up, you want to avoid getting the tape into the air system. It has a tenancy to break off in little threads and clog the height valves in the wheel wells.
Either use the pipe dope type stuff, or do not wrap the threads all the way to the end.
I just avoid the tape for this system.
Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo'
http://m000035.blogspot.com
|
|
|
|
Goto Forum:
Current Time: Wed Nov 20 07:36:00 CST 2024
Total time taken to generate the page: 0.02075 seconds
|
GMCforum
Search
Help
Register
Login
Home
