Home » Public Forums » GMCnet » Modify electrolevel 2 pumps (Retrofit VIAIRs?)
| Re: [GMCnet] Modify electrolevel 2 pumps [message #325831 is a reply to message #325829] |
Tue, 07 November 2017 16:43   |
James Hupy
Messages: 6806
Registered: May 2010
Karma:
|
Senior Member |
|
|
If you have a late 77 or 78, you should have the EL ll. It has two
compressors, with desiccant dryers, mounted on a metal frame along with
relays and solenoid valves. All connected up with plug in wire harnesses.
Ride height is controlled by a '70's version of electronic ride height
controls. Consists of mechanical linkages connected to shutter wheels with
gaps in the wheel that covers up or uncovers light emitting diodes focused
on photo transistors. When the gap in the shutter wheel allows the light to
shine through, the transistor either opens or closes a 12 volt current that
goes to one of the relays. The relay in turn turns on the compressor and
accompanying solenoid to allow air to be pumped into the correct air bag.
This raises the coach, moves the shutter wheel, and opens the circuit to
the relay, shutting off the compressor. Works opposite to that when
lowering. Another relay and solenoid is actuated, air is bled out of the
bag to lower, that moves the shutter wheel, blocking the light, and opens
the relay. Clear as mud, right.
When some ham fisted, well intentioned, technician has not been in there
mucking about, and the 40 year old electronic circuit boards are working
correctly, the system works really well. Only two air hoses, one left, and
one right. Way fewer leak points.
Jim Hupy
Salem, Or.
On Nov 7, 2017 2:22 PM, "gene Fisher" wrote:
> On Tue, Nov 7, 2017 at 12:02 PM Will wrote:
>
>> LOVE IT, but the company says that it will not work with a tank, yet GMC
>> owners are using a tank =) Its awesome for $400 though!
>>
> I am not using tank on my 3 coaches and built my own with 2 pumps. Each
> valve you replace will cost you more
>
>
>> On Tue, Nov 7, 2017 at 11:12 AM, gene Fisher
>> wrote:
>>
>>> Comsider this
>>> http://www.gmcmhphotos.com/photos/flor-gmc-27s-in-
> florence-2c-or/p40827-
>>> wireless-air-block-diagram-by-gmces-bryon.html
>>>
>>>
>>>
>>> On Tue, Nov 7, 2017 at 8:08 AM Will wrote:
>>>
>>>> Thank you John. Are the level sensors variable voltage, or a simple
> 12v
>>>> switch? as one side is a constant 8v regardless of the
> inflate/deflate
>>>> switch position. The other is 1v on raise, and 12v on deflate,
>>>>
>>>> I'm thinking of a single larger VIAIR with a tank as i have one from
> my
>>> 4x4
>>>> days.
>>>>
>>>> On Tue, Nov 7, 2017 at 10:40 AM, John Shutzbaugh ncserv111@gmail.com>
>>>> wrote:
>>>>
>>>> > The valves on the compressors are the LOWER valves and are
> controlled
>>> by
>>>> > the sensors in the wheel wells. It is possible to replace the
>>>> compressors
>>>> > with another type, but you will have to obtain and plumb in
> separate
>>>> > exhaust valves. Also the air dryer is incorporated in the
> compressor
>>>> > assemblies,
>>>> > so a filter/dryer should be provided.
>>>> > --
>>>> > John Shutzbaugh, Vacaville, CA, ncserv@aol.com;
>>>> > 77 Eleganza, bought it new, can't blame PO, and
>>>> > 78 Buskirk stretch, "What were we thinking?"
>>>> >
>>>> > _______________________________________________
>>>> > GMCnet mailing list
>>>> > Unsubscribe or Change List Options:
>>>> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>> >
>>>> _______________________________________________
>>>> GMCnet mailing list
>>>> Unsubscribe or Change List Options:
>>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>>
>>> --
>>> 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:
>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
> --
> 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:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
|
|
|
|
Current Time: Sun May 19 22:11:06 CDT 2024
Total time taken to generate the page: 0.06283 seconds
|
GMCforum
Search
Help
Register
Login
Home
