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| Re: [GMCnet] ride height control [message #81739 is a reply to message #81730] |
Sat, 24 April 2010 06:43   |
GMCWiperMan
Messages: 1248
Registered: December 2007
Karma: 1
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Senior Member |
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I presume you're referring to an Electolevel system -- not EL II. I
wouldn't expect much luck trying to lubricate those solenoid valves. By
design, they don't require any; it's a simple magnetic needle valve riding
quite freely inside the coil; it's very unlikely that it would bind or stick
unless there's contamination in there which lubrication won't remove. Even
that is unlikely: it's more probable that debris is getting beneath the
soft tip of the needle and its seat. Only disassembly and cleaning is going
to help.
Removing the valves from the christmas tree is the most difficult part of
that disassembly -- there's a special wrench required to take the body
apart, but it's easily made from a large nut with a couple of pins inserted
into its face to match holes in the valve.
When disassembling the christmas tree be sure to make where and how the
valves are mounted; they are easily confused and the Hold valve, closest to
the air bag, has a direction arrow which must point AWAY from the air bag --
that's counter-intuitive until you remember that it's intended to hold air
in the bag, not allow it to flow into it.
Sorry, but there's no easier way, IMHO.
Ken H.
On Fri, Apr 23, 2010 at 11:53 PM, JoAnne Bissell
<joanne.bissell@gmail.com>wrote:
> Is there any safe lubricant that one could introduce into the compressor
> intake that can free up sticky solenoids.
> TIA
>
> 2-4 the road
> _______________________________________________
>
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| Re: [GMCnet] ride height control [message #81743 is a reply to message #81730] |
Sat, 24 April 2010 07:33 |
powerjon
Messages: 2446
Registered: January 2004
Karma: 5
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Senior Member |
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It would be BAD to introduce any liquid into the compressor inlet.
You can damage the internals as liquids do not compress. If you want
to try and put a little into the supply line to the solenoids use
Liquid Wrench or a 50/50 mixture of ATF and Acetone and then try to
actuate the solenoid. The RED color tubing is the air supply. DO NOT
use WD-40 as it can cause a gumming issue.
The one way to solve this problem would be to take the solenoids
apart, clean and lube with a very light lube of ATF on the o-rings and
then test. This may work, but most likely you will need to replace
the solenoids as there is probably a lot of corrosion.
J.R. Wright
GMC GreatLaker
TZE Zone Restorations
77 Eleganza Custom (For Sale)
1975 Avion (Under Reconstruction)
Michigan
> Is there any safe lubricant that one could introduce into the
> compressor
> intake that can free up sticky solenoids.
> TIA
>
> 2-4 the road
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
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J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
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| Re: [GMCnet] ride height control [message #81775 is a reply to message #81730] |
Sat, 24 April 2010 18:25 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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| 2-4 the road wrote on Fri, 23 April 2010 23:53 |
Is there any safe lubricant that one could introduce into the compressor
intake that can free up sticky solenoids.
TIA
2-4 the road
|
JoAnne,
My advice would be don't.
You don't say what mod level your suspension is, 77 would be an EL, but if the bags are not current then you don't know what their tolerance is for what you might expose them to and that could be an expensive datum.
I do not claim to be an expert on GMC air suspension, but I spent several years fighting with air operated automation. Anything put anywhere in a motivating air system can be counted on to end up everywhere in the system. (Murphy's Law requires that to be where it is least wanted.)
That is my take on the issue, others may have better ideas.
I realize the dis-assembling and mechanically cleaning the parts and then applying a dry film lubricant will be a project, but it may also be the most effective and most cost effective in the final evaluation.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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