| Re: [GMCnet] electro II air suspension [message #303112] |
Tue, 05 July 2016 12:00  |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Brian,
As you'll see when you download the manual, '78's came (probably early)
with Electrolevel with one pump and 6 individual solenoid valves. Others
came with Electrolevel II -- 2 pumps with internal valves. Easy to
recognize the difference. The manual has separate chapters (4a & 4b) for
the two.
Ken H.
On Tue, Jul 5, 2016 at 12:39 PM, Glover, Brian K.
wrote:
> Thanks, Paul
>
> Those photos really help me see what I am supposed to be looking at !?
> funny I thought I only saw one pump in my GMC ? I will have to look again
> when I get back in to town.
>
> Brian
>
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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] electro II air suspension [message #303146 is a reply to message #303145] |
Wed, 06 July 2016 05:55  |
Glover, Brian K.
Messages: 87
Registered: October 2015
Location: Griffin Georgia
Karma: 0
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Member |
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Thanks,
so the only system that doesn’t have an air tank would be the electro II ? I looked at mine before and couldn’t find an air tank so I was assuming it was the II ?
The Lh switch would work and you could hear the pump run and the bag would fill, the Rh though would do nothing, that’s when I looked and noticed there was only one pump ( and per the diagram I saw for the II there should be 2 ? ) anyway, I haven’t yet had the time to trace it all out and figure out what is going on, so why I had the time I was just trying to familiarize myself with the system.
I am out of town and don’t have the opportunity to actual see the parts and peace's in front of me, but it's nice to research a little so when I do have the chance I will be somewhat knowledgeable !
Thanks again.
-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of gene Fisher
Sent: Wednesday, July 06, 2016 6:43 AM
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] electro II air suspension
Read here
http://www.gmcws.org/Tech/dsimmons/air_suspension/air-suspension-system.html
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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Brian G.
Griffin Ga.
1978 Eleganza II
TZE168V101637
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| Re: [GMCnet] electro II air suspension [message #303150 is a reply to message #303146] |
Wed, 06 July 2016 07:13 |
kstockwell
Messages: 367
Registered: May 2016
Location: Putney VT
Karma: 4
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When I raise one side I hear the pump turn on, when I raise the other side I hear nothing but the pressure goes up and the height increases.
I have no idea why since there's only one pump- but it works
kelly
1978 Kingsley
1978 Kingsley
Putney VT
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| Re: [GMCnet] electro II air suspension [message #303157 is a reply to message #303154] |
Wed, 06 July 2016 09:11 |
Glover, Brian K.
Messages: 87
Registered: October 2015
Location: Griffin Georgia
Karma: 0
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So when selecting either side LH or RH does the pump have to come on ?
Sent from my iPhone
> On Jul 6, 2016, at 9:58 AM, Matt Colie wrote:
>
> kstockwell wrote on Wed, 06 July 2016 08:13
>> When I raise one side I hear the pump turn on, when I raise the other side I hear nothing but the pressure goes up and the height increases.
>>
>> I have no idea why since there's only one pump- but it works
>>
>> kelly
>> 1978 Kingsley
>
> Kelly,
>
> The pump will only run when it is needed and there is some hysteresis in the switch. Mine almost always starts when we fuel. Sometimes I can level
> the coach with the pumps starting. Just happens.
>
> Matt
> --
> Matt & Mary Colie - Members GMCMI, GMCGL, GMCES
> '73 Glacier 23 - Still Loving OE Rear Drum Brake with Applied Control Arms
> Now with both true Keyless and remote entry
> SE Michigan - Twixt A2 and Detroit
>
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Brian G.
Griffin Ga.
1978 Eleganza II
TZE168V101637
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| Re: [GMCnet] electro II air suspension [message #303169 is a reply to message #303112] |
Wed, 06 July 2016 14:43 |
Rick Williams
Messages: 256
Registered: July 2004
Karma: 0
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Senior Member |
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The original post was inquiring about an Electrolevel II. Or at least that is what Brian thinks he has at this point. The last 1000 or so coaches had EL II. Unless it has been modified from the stock factory EL II, it will have two compressors and one or both will come on every time the coach is raised. One compressor for each side. There is no reserve air tank. The switch settings can seem confusing to a new user but they work. There is a modification in the May 1996 issue of GMC Motorhome Marketplace that some may find to their liking. The RH and LH switches in the Raise position will only activate a compressor if the Auto/Hold switch is in the Hold position. They must be in the OFF position and the Auto/Hold switch must be in Auto for the wheel sensors to trigger a "raise" and start the compressor for the appropriate side.
Rick
Rick Williams
Bliss, Michigan
1978 Eleganza II
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| Re: [GMCnet] electro II air suspension [message #303171 is a reply to message #303157] |
Wed, 06 July 2016 15:27 |
kstockwell
Messages: 367
Registered: May 2016
Location: Putney VT
Karma: 4
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[quote title=Glover, Brian K. wrote on Wed, 06 July 2016 10:11]So when selecting either side LH or RH does the pump have to come on ?
The pump is audible when one side goes up, not when the other side goes up (but it goes up).
I should look closely, I thought there was only one compressor in there for some reason. The compressor is under the electrical cabinet next to the closet right? (side wet bath)
kelly
1978 kingsley
1978 Kingsley
Putney VT
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| Re: [GMCnet] electro II air suspension [message #303193 is a reply to message #303169] |
Wed, 06 July 2016 22:08 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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Rick Williams wrote on Wed, 06 July 2016 14:43The original post was inquiring about an Electrolevel II. Or at least that is what Brian thinks he has at this point. The last 1000 or so coaches had EL II. Unless it has been modified from the stock factory EL II, it will have two compressors and one or both will come on every time the coach is raised. One compressor for each side. There is no reserve air tank. The switch settings can seem confusing to a new user but they work. There is a modification in the May 1996 issue of GMC Motorhome Marketplace that some may find to their liking. The RH and LH switches in the Raise position will only activate a compressor if the Auto/Hold switch is in the Hold position. They must be in the OFF position and the Auto/Hold switch must be in Auto for the wheel sensors to trigger a "raise" and start the compressor for the appropriate side.
Rick
That is the way my 1976 electrolevel 1 system works. It confuses the heck out of me on the rare times that I use it. Just last week at the Branson GMCMI rally I tried to raise the coach because I wanted my refrigerator level. It would not go up because the switch was in "Auto". Then I remembered that it had to be in "hold" to manually raise the coach.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] electro II air suspension [message #303201 is a reply to message #303193] |
Thu, 07 July 2016 04:26 |
Glover, Brian K.
Messages: 87
Registered: October 2015
Location: Griffin Georgia
Karma: 0
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Member |
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Ok, that is great information ! I will look at it this weekend and go by what you have written below to see if I can get it to work ?!
Thanks again for all the information !
Brian
-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Ken Burton
Sent: Wednesday, July 06, 2016 11:08 PM
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] electro II air suspension
Rick Williams wrote on Wed, 06 July 2016 14:43
> The original post was inquiring about an Electrolevel II. Or at least that is what Brian thinks he has at this point. The last 1000 or so coaches
> had EL II. Unless it has been modified from the stock factory EL II, it will have two compressors and one or both will come on every time the coach
> is raised. One compressor for each side. There is no reserve air tank. The switch settings can seem confusing to a new user but they work. There is
> a modification in the May 1996 issue of GMC Motorhome Marketplace that some may find to their liking. The RH and LH switches in the Raise position
> will only activate a compressor if the Auto/Hold switch is in the Hold position. They must be in the OFF position and the Auto/Hold switch must be
> in Auto for the wheel sensors to trigger a "raise" and start the compressor for the appropriate side.
>
> Rick
That is the way my 1976 electrolevel 1 system works. It confuses the heck out of me on the rare times that I use it. Just last week at the Branson
GMCMI rally I tried to raise the coach because I wanted my refrigerator level. It would not go up because the switch was in "Auto". Then I remembered
that it had to be in "hold" to manually raise the coach.
--
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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Brian G.
Griffin Ga.
1978 Eleganza II
TZE168V101637
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| Re: [GMCnet] electro II air suspension [message #303236 is a reply to message #303201] |
Thu, 07 July 2016 16:02 |
Kimberlea Weeks
Messages: 675
Registered: July 2010
Karma: 6
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Senior Member |
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A technical session that was held at the GMCMI Summer Get-together in
Branson last week was on the Electro Level II/Level Sensors presented by
John Sharpe with a detailed handout available at:
http://www.gmcmi.com/technical-presentations-papers/
under >>Rear Suspension
Kimberlea Weeks
VP Administration and Convention Manager
612.501.4600 | f.866.519.0047 | www.gmcmi.com
GMC Motorhomes International
1402 So. Cage Blvd | Unit 273 | Pharr | TX 78577-6288
We invite you to join us at all of our events!
On Thu, Jul 7, 2016 at 4:26 AM, Glover, Brian K.
wrote:
> Ok, that is great information ! I will look at it this weekend and go by
> what you have written below to see if I can get it to work ?!
>
> Thanks again for all the information !
>
> Brian
>
> -----Original Message-----
> From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Ken
> Burton
> Sent: Wednesday, July 06, 2016 11:08 PM
> To: gmclist@list.gmcnet.org
> Subject: Re: [GMCnet] electro II air suspension
>
> Rick Williams wrote on Wed, 06 July 2016 14:43
>> The original post was inquiring about an Electrolevel II. Or at least
> that is what Brian thinks he has at this point. The last 1000 or so coaches
>> had EL II. Unless it has been modified from the stock factory EL II, it
> will have two compressors and one or both will come on every time the coach
>> is raised. One compressor for each side. There is no reserve air tank.
> The switch settings can seem confusing to a new user but they work. There is
>> a modification in the May 1996 issue of GMC Motorhome Marketplace that
> some may find to their liking. The RH and LH switches in the Raise position
>> will only activate a compressor if the Auto/Hold switch is in the Hold
> position. They must be in the OFF position and the Auto/Hold switch must be
>> in Auto for the wheel sensors to trigger a "raise" and start the
> compressor for the appropriate side.
>>
>> Rick
>
> That is the way my 1976 electrolevel 1 system works. It confuses the heck
> out of me on the rare times that I use it. Just last week at the Branson
> GMCMI rally I tried to raise the coach because I wanted my refrigerator
> level. It would not go up because the switch was in "Auto". Then I
> remembered
> that it had to be in "hold" to manually raise the coach.
> --
> Ken Burton - N9KB
> 76 Palm Beach
> Hebron, Indiana
>
> _______________________________________________
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>
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| Re: [GMCnet] electro II air suspension [message #303239 is a reply to message #303112] |
Thu, 07 July 2016 17:21 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Senior Member |
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Most common failure is the foam dust shield in the switch has turned to goo and coated the contacts. Switch can be tested with a meter out of circuit. They can be carefully opened to service cleaning with Deoxit D5 and using dielectric grease on moving parts. My switch looked fine but a micro bit of foam on the contacts prevented electrons moving.
Also if there are crimp connectors back at the compressor and valves grab each one at a time and pull wires on either side. If they come apart they were bad and needed to he redone anyway. I upgrade to marine grade butt splices with integral hot melt sealant. Last repair ever needed.
John Lebetski
Woodstock, IL
77 Eleganza II
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