Home » Public Forums » GMCnet » Electro Level II questions
| Electro Level II questions [message #202906] |
Thu, 28 March 2013 18:42  |
Francois
Messages: 161
Registered: October 2012
Location: Southern California
Karma: 0
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Senior Member |
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Hello good people. Back after a bit of a health scare. OK now.
Anyway, I went ahead and got the Sully system for the airbags, and went with two inexpensive (but well rated) two cylinder tire inflation compressors to substitute out my original equipment one cylinder compressors.
I re-used the relays, and I hooked the motor power up to the new compressor lines. This seems to work and the bags have inflated from all the way down to all the way up (about 50 pounds) in a little over a minute. The original switches at the left armrest area work to inflate.
I am now trying to get the switch deflate side to work. I initially thought the function might be in the skinner valves (the two little round solenoid mechanisms). These are not connected in my system right now. The skinner valves do open when I hook up the electrical and hit deflate, but they also appear to open on inflate, so I am pretty sure airbag deflation doesn't happen at the skinner valve.
When you hit deflate on the original system, can someone tell me what mechanism lets the air out and where deflation actually happens?
I actually have right and left pressure gauges which I am mounting in the dash, as soon as I get the wiring OK. I would like to use the original switches, but if I can't, I will rig mechanical deflation buttons right below the current switches.
But would rather use the switches to deflate. Anyone?
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| Re: [GMCnet] Electro Level II questions [message #202910 is a reply to message #202906] |
Thu, 28 March 2013 19:15  |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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Sigmund, the answers you seek can be found in the GMC manual for the 77-78
models. Thereby a very good description of how the system operates there.
If, after reading the manual, there are unanswered questions existing, come
back and pick my feeble mind.(grin)
Jim Hupy
Salem,Or
78 Gmc Royale 403 El 2
On Mar 28, 2013 4:42 PM, "Sigmund Frankenfelter" <ziggy.frankenf@gmail.com>
wrote:
>
>
> Hello good people. Back after a bit of a health scare. OK now.
>
> Anyway, I went ahead and got the Sully system for the airbags, and went
> with two inexpensive (but well rated) two cylinder tire inflation
> compressors to substitute out my original equipment one cylinder
> compressors.
>
> I re-used the relays, and I hooked the motor power up to the new
> compressor lines. This seems to work and the bags have inflated from all
> the way down to all the way up (about 50 pounds) in a little over a minute.
> The original switches at the left armrest area work to inflate.
>
> I am now trying to get the switch deflate side to work. I initially
> thought the function might be in the skinner valves (the two little round
> solenoid mechanisms). These are not connected in my system right now. The
> skinner valves do open when I hook up the electrical and hit deflate, but
> they also appear to open on inflate, so I am pretty sure airbag deflation
> doesn't happen at the skinner valve.
>
> When you hit deflate on the original system, can someone tell me what
> mechanism lets the air out and where deflation actually happens?
>
> I actually have right and left pressure gauges which I am mounting in the
> dash, as soon as I get the wiring OK. I would like to use the original
> switches, but if I can't, I will rig mechanical deflation buttons right
> below the current switches.
>
> But would rather use the switches to deflate. Anyone?
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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| Re: [GMCnet] Electro Level II questions [message #202912 is a reply to message #202910] |
Thu, 28 March 2013 19:38 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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Senior Member |
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Feeble. HA!
Sully
77 royale
Seattle
Sent from my iPhone
On Mar 28, 2013, at 5:15 PM, James Hupy <jamesh1296@gmail.com> wrote:
> Sigmund, the answers you seek can be found in the GMC manual for the 77-78
> models. Thereby a very good description of how the system operates there.
> If, after reading the manual, there are unanswered questions existing, come
> back and pick my feeble mind.(grin)
> Jim Hupy
> Salem,Or
> 78 Gmc Royale 403 El 2
> On Mar 28, 2013 4:42 PM, "Sigmund Frankenfelter" <ziggy.frankenf@gmail.com>
> wrote:
>
>>
>>
>> Hello good people. Back after a bit of a health scare. OK now.
>>
>> Anyway, I went ahead and got the Sully system for the airbags, and went
>> with two inexpensive (but well rated) two cylinder tire inflation
>> compressors to substitute out my original equipment one cylinder
>> compressors.
>>
>> I re-used the relays, and I hooked the motor power up to the new
>> compressor lines. This seems to work and the bags have inflated from all
>> the way down to all the way up (about 50 pounds) in a little over a minute.
>> The original switches at the left armrest area work to inflate.
>>
>> I am now trying to get the switch deflate side to work. I initially
>> thought the function might be in the skinner valves (the two little round
>> solenoid mechanisms). These are not connected in my system right now. The
>> skinner valves do open when I hook up the electrical and hit deflate, but
>> they also appear to open on inflate, so I am pretty sure airbag deflation
>> doesn't happen at the skinner valve.
>>
>> When you hit deflate on the original system, can someone tell me what
>> mechanism lets the air out and where deflation actually happens?
>>
>> I actually have right and left pressure gauges which I am mounting in the
>> dash, as soon as I get the wiring OK. I would like to use the original
>> switches, but if I can't, I will rig mechanical deflation buttons right
>> below the current switches.
>>
>> But would rather use the switches to deflate. Anyone?
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
> _______________________________________________
> GMCnet mailing list
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Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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| Re: [GMCnet] Electro Level II questions [message #202919 is a reply to message #202912] |
Thu, 28 March 2013 21:25 |
John Sharpe
Messages: 489
Registered: February 2006
Location: Texas
Karma: 1
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Senior Member |
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| Quote: |
....I re-used the relays, and I hooked the motor power up to the new compressor lines. This seems to work and the bags ......
|
When you removed the two old compressors you also removed the deflate valves that are built into the compressor heads. The skinner valves you refer to are hold valves. They seal air in the bags so it won't leak out through the compressor. You will have to add two deflate skinner valves to your system. You also could have a moisture issue as the dryers were also part of the original compressors.
John Sharpe
Humble,TX
'78 Eleganza TBI
'89 Spectrum 2000 MPI V-10
'40 Ford Panel Delivery TPI
johnasharpe@gmail.com
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| Re: [GMCnet] Electro Level II questions [message #202922 is a reply to message #202906] |
Thu, 28 March 2013 21:36 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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Senior Member |
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did you read here?
http://gmcmotorhome.info/list.html#Rear
gene
On Thu, Mar 28, 2013 at 4:42 PM, Sigmund Frankenfelter <
ziggy.frankenf@gmail.com> wrote:
>
>
> Hello good people. Back after a bit of a health scare. OK now.
>
> Anyway, I went ahead and got the Sully system for the airbags, and went
> with two inexpensive (but well rated) two cylinder tire inflation
> compressors to substitute out my original equipment one cylinder
> compressors.
>
> I re-used the relays, and I hooked the motor power up to the new
> compressor lines. This seems to work and the bags have inflated from all
> the way down to all the way up (about 50 pounds) in a little over a minute.
> The original switches at the left armrest area work to inflate.
>
> I am now trying to get the switch deflate side to work. I initially
> thought the function might be in the skinner valves (the two little round
> solenoid mechanisms). These are not connected in my system right now. The
> skinner valves do open when I hook up the electrical and hit deflate, but
> they also appear to open on inflate, so I am pretty sure airbag deflation
> doesn't happen at the skinner valve.
>
> When you hit deflate on the original system, can someone tell me what
> mechanism lets the air out and where deflation actually happens?
>
> I actually have right and left pressure gauges which I am mounting in the
> dash, as soon as I get the wiring OK. I would like to use the original
> switches, but if I can't, I will rig mechanical deflation buttons right
> below the current switches.
>
> But would rather use the switches to deflate. Anyone?
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
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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| Re: [GMCnet] Electro Level II questions [message #202930 is a reply to message #202928] |
Thu, 28 March 2013 23:19 |
Dave Mumert
Messages: 272
Registered: February 2004
Location: Olds, AB, Canada
Karma: 0
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Senior Member |
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Hi
The only reason for the hold valve was the original compressor leaked
through the lowering valve if the pressure was above about 60 psi. You can
eliminate the hold solenoid valve by using a cheap check valve. GM could
not use the check valve because the deflate valve was in the compressor.
I doubt your new compressors will even need a check valve but if they do you
can get one from McMaster Car
(www.mcmaster.com)
You can use the existing solenoid valve for the lowering valves. It is
important to orient the valve correctly, the arrow on the valve points from
the high pressure side to the low pressure side (away from the airbag).
McMaster also sells mufflers for the air discharge so you don't have to put
up with the noise of the exhaust air when you go to lower mode.
You can get some idea of what needs to be done here
http://mumert.com/el2000.htm
Dave
> -----Original Message-----
> Subject: Re: [GMCnet] Electro Level II questions
>
> Ah. In the head of the old compressor. Yes that is one pair of wires that
I
> now have no connector for. So on deflation, the skinner valve opens, and
> the air goes backward through the lines and exits out the head - for the
old
> system.
>
> It sounds like, if my system doesn't prevent air leaking back through the
> compressors, I will have to install the skinner valves in the lines to do
that.
>
> As well, since the head deflater is solenoid activated, I will have to
see if I can
> adapt that to, perhaps a deflating skinner valve.
>
> I might try hooking the compressor head wires to the skinner valves,
leaving
> one side of the valve open.
>
> Thanks gents. I see a way forward.
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| Re: [GMCnet] Electro Level II questions [message #202936 is a reply to message #202928] |
Fri, 29 March 2013 04:09 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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Senior Member |
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or
you could throw it all away and go to a wireless air system
hook up 2 hoses to the air bags, and you are done...
http://gmcmotorhome.info/wireless.html
good luck
gene
On Thu, Mar 28, 2013 at 8:46 PM, Sigmund Frankenfelter <
ziggy.frankenf@gmail.com> wrote:
>
>
> Ah. In the head of the old compressor. Yes that is one pair of wires that
> I now have no connector for. So on deflation, the skinner valve opens, and
> the air goes backward through the lines and exits out the head - for the
> old system.
>
> It sounds like, if my system doesn't prevent air leaking back through the
> compressors, I will have to install the skinner valves in the lines to do
> that.
>
> As well, since the head deflater is solenoid activated, I will have to
> see if I can adapt that to, perhaps a deflating skinner valve.
>
> I might try hooking the compressor head wires to the skinner valves,
> leaving one side of the valve open.
>
> Thanks gents. I see a way forward.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
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
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
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| Re: Electro Level II questions [message #203309 is a reply to message #202906] |
Mon, 01 April 2013 15:30 |
Francois
Messages: 161
Registered: October 2012
Location: Southern California
Karma: 0
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Senior Member |
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I just thought I would let you good people know.
I re-used the skinner valves (which are solenoid operated with two wires)as the deflation mechanism. The Electro Level II deflation mechanism is also solenoid operated with two wires, so I used 1/4 inch male and female electrical connectors and some wire to hook them up to the skinner valves. Dave Mumert above suggested this approach.
I oriented the skinners the same way as they are originally, and on the side where the air exits, I left the very small tube and connector on the deflate side of the skinners.
In short, the armrest switches now work for both inflate and deflate. The new Sully system is holding air. The only thing left to do will be to install air gauges. At this point I think I will not put the gauges in the dash, but instead on the plate where the armrest switches are.
If there are downsides, it is the mess of wiring in the compressor compartment and the number of brass connectors I have in there. It all works, but it isn't the neatly engineered system I envisioned. I am also adding check valves. If I really want it to be that neat and simple image, I will have to solder new wires for two weeks straight. Then I will have to do something to simplify the pneumatic side.
Anyway, thanks all for the suggestions. I feel like I made progress.
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| Re: Electro Level II questions [message #203891 is a reply to message #202906] |
Sat, 06 April 2013 22:33 |
Darryl
Messages: 144
Registered: December 2011
Location: Northern California
Karma: 0
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Senior Member |
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"If there are downsides, it is the mess of wiring in the compressor compartment and the number of brass connectors I have in there. It all works, but it isn't the neatly engineered system I envisioned. I am also adding check valves. If I really want it to be that neat and simple image, I will have to solder new wires for two weeks straight. Then I will have to do something to simplify the pneumatic side."
There's a lot to be said for trying to keep things as original as possible unless there is a real reason to change it. Are you documenting things so a future owner can figure out how to deal with it?
Darryl Meyers
1978 Eleganza II
El Dorado Hills, CA
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