| Electrolevel II [message #74766] |
Mon, 22 February 2010 23:28  |
mini577
Messages: 16
Registered: March 2008
Location: Berryville, AR
Karma: 0
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Junior Member |
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Hi all,
Okay, just one last nagging problem and hopefully we are on the road in a day or so! I have been fighting my ELII system in my 1978 for a while now and don't seem to be making much progress.. here is what I have.
My drivers side leaks down over 6 hours or so. The passenger side stays up forever. The drivers side also took a very long time to pump up, and the pump seems to want to keep running forever even with all of the switches off. Replaced the pump with a "new" take off. The problem has not gone away.
I started to then replace some other parts that were suspect. The switches have all been replaced with new. The relays that operate the pumps have been replaced with new. The two diodes were replaced with new as they were installed. I also took 12v from the house system during the process to give the pumps a few more amps as was suggested.
The air bags are the new two bag system from JimK, and in the ELII system there is a minimal amount of air hose in the system. I have checked all of the fittings for leaks but do not find any.
Today I swapped the air lines only from the pumps to the opposite side of the coach. I get a leak down on the passenger side now as expected.
My leak down now has to be back through the pump, but the solenoid valve should be stopping this from taking place correct? As for the pump continuing to run is this caused by it being unable to maintain pressure (with the switches off?!?), or should I be looking at that fancy height sensor in the wheel well?
Any advice would be great!
Thanks again,
Drew
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| Re: Electrolevel II [message #74768 is a reply to message #74766] |
Mon, 22 February 2010 23:52  |
bukzin
Messages: 840
Registered: April 2004
Location: North California
Karma: 0
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Senior Member |
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Do you have a check (one way) valve for each side?
Can you post some photos of your set-up?
Bukzin
1977 Palm Beach
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| Re: Electrolevel II [message #74771 is a reply to message #74766] |
Tue, 23 February 2010 00:05 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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If you swapped hoses and the problem moved to the other side, then the leak problem has to be between the place you swapped the hoses back to the compressor.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
[Updated on: Tue, 23 February 2010 00:07] Report message to a moderator |
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| Re: Electrolevel II [message #74774 is a reply to message #74773] |
Tue, 23 February 2010 00:33 |
Donovan-formerly Jase386
Messages: 139
Registered: January 2009
Location: Greenville SC
Karma: 0
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Senior Member |
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did you spray the entire length of hose? the plastic line on my ice maker in the kitchen sprung a leak mid hose. just a tiny tiny hole that made a small mist.. no telling how long it had been leaking, the wall turned black before i found it.
i know not related. but it could be a defect in the hose, since you already sprayed the connections.
Donovan, Greenville SC
1975 Eleganza II
81,500 miles
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| Re: Electrolevel II [message #74777 is a reply to message #74773] |
Tue, 23 February 2010 01:55 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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Drew,
I am not an expert on Electrolevel II. I have an Electrolevel I system. I have been digging over Duane's Suspension system seminar materials:
http://gmcws.org/Tech/dsimmons/air_suspension/air-suspension-system.html
It looks to me like you are correct. The shutoff solenoid should stop all air flow to and from the air bag. Are you positive that there is no power applied to the solenoid when the coach is parked? It might we worth your time to unplug that solenoid after you park the coach to see if that stops your leak down problem. If it does not, then I agree with you that the solenoid must be leaking either backwards or to the outside air.
On the compressor failing to shut off, It looks like that is totally controlled by the height sensor and the compressor relay. Is it possible that you have a sticking relay?
If you have plastic hose ends, replace them with brass ones. When I was chasing leaks on mine, replacing all of the hose ends, even though they did not appear to be leaking, fixed my problems. My coach can sit all winter and never leak down. It was not that way when I got it. I would at least replace the hose ends on the driver's side where you have the problem.
Hopefully someone with more Electrolevel II knowledge will hop in here and comment.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Electrolevel II [message #74785 is a reply to message #74775] |
Tue, 23 February 2010 06:49 |
GMCWiperMan
Messages: 1248
Registered: December 2007
Karma: 1
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Senior Member |
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Drew,
With an Electrolevel I rather than II, I'm speculating, but I suspect that
the solenoid valves on II are similar to those on I: They must be installed
"backward". What I mean is that the other two solenoid valves on each side
have the flow direction arrows pointing away from the compressed air source,
toward the air bag. But the Hold valve, which is the only on in the II
system, has the arrow pointing the OTHER way.
When you think about it, that's not really backward because for a Hold
valve, the air source IS the air bag. If the Hold valve is installed with
the arrow pointing TOWARD the air bag, it will probably leak.
Just one more thing to check.
Ken H.
Americus, GA
'76 X-Birchaven
www.gmcwipersetc.com
On Tue, Feb 23, 2010 at 2:04 AM, Drew Wood <drew@usa650.com> wrote:
>
>
> I did not. I think the fact that switching hoses on the solenoids going to
> the two sides making the other side lose height rules out the hose.
> _______________________________________________
>
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| Re: Electrolevel II [message #74859 is a reply to message #74807] |
Wed, 24 February 2010 02:11 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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Drew, Do you have 2 pumps? One for each side.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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