Home » Public Forums » GMCnet » [GMCnet] Alternate,air pump
| [GMCnet] Alternate,air pump [message #335237] |
Mon, 16 July 2018 08:34  |
Anonymous
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Viair if you want to power it with 12vdc or a 1/2 hp Senco nail gun compressor if you want to power it via 120vac through a simple inverter. Available in big box stores or on line sources such as:
( https://www.tylertool.com/senco-pc1010-1-2-hp-1-gallon-oil-free-hand-carry-compressor/sennpc1010,default,pd.html?ref=pla&zmam=31282435&zmas=47 &zmac=723&zmap=sennpc1010&gclid=EAIaIQobChMI39qyrNmj3AIVQr7ACh0S8Q73EAQYAiABEgKqnfD_BwE)
The Senco route gives you a faster action, less expensive air source that can be replaced anywhere on the road at any big box store for a bit over $100 in a few minutes. It is a bit larger physically, already has an air tank, air pressure regulator, and all the plumbing so hooking up the air side is running one air line. Hooking up the electric side is just wire in an inexpensive modified sine wave inverter as close to your batteries as you can do conveniently and run a 3 wire extension cord to wherever the Senco is located.
Put the Senco where it is easy to get to and use a quick disconnect with a check valve so you can grab it to inflate tires or anything else around your coach.
I had one of each in our two coaches and both work well.
Jerry
Jerry Work
The Dovetail Joint
Fine furniture designed & hand crafted
in the 1907 former Masonic Temple building
in historic Kerby, OR
http://jerrywork.com
———-
Date: Sun, 15 Jul 2018 12:33:49 -0700
From: "Dean Hanson"
To:
Subject: [GMCnet] Alternate air pump
Message-ID:
Content-Type: text/plain; charset="us-ascii"
Looking for suggestions for an air pump to be used for my air tank to power
the ride. Any alternative ideas welcome.
75 Avion
Dean C. Hanson
Fremont, Ca. 94536
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| Re: [GMCnet] Alternate,air pump [message #335239 is a reply to message #335237] |
Mon, 16 July 2018 09:01  |
Will Albers
Messages: 183
Registered: November 2017
Location: Detroit MI (Belleville)
Karma: 2
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Senior Member |
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I had the 200 psi version of this left over from my 4x4 days:
https://www.amazon.com/VIAIR-150-PSI-High-Flow-Source/dp/B000X9LTXA/ref=sr_1_11?ie=UTF8&qid=1531749561&sr=8-11&keywords=viair+444c
I use it now as my air source for my bags, and airing up kids inflatable
toys, air mattresses, tires, etc. I simply utilize a 12v air valve in the
circuit that used to power the air compressor. LOVE this thing!
-Will
On Mon, Jul 16, 2018 at 9:35 AM Gerald Work via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Viair if you want to power it with 12vdc or a 1/2 hp Senco nail gun
> compressor if you want to power it via 120vac through a simple inverter.
> Available in big box stores or on line sources such as:
>
> (
> https://www.tylertool.com/senco-pc1010-1-2-hp-1-gallon-oil-free-hand-carry-compressor/sennpc1010,default,pd.html?ref=pla&zmam=31282435&zmas=47 &zmac=723&zmap=sennpc1010&gclid=EAIaIQobChMI39qyrNmj3AIVQr7ACh0S8Q73EAQYAiABEgKqnfD_BwE
> )
>
> The Senco route gives you a faster action, less expensive air source that
> can be replaced anywhere on the road at any big box store for a bit over
> $100 in a few minutes. It is a bit larger physically, already has an air
> tank, air pressure regulator, and all the plumbing so hooking up the air
> side is running one air line. Hooking up the electric side is just wire in
> an inexpensive modified sine wave inverter as close to your batteries as
> you can do conveniently and run a 3 wire extension cord to wherever the
> Senco is located.
>
> Put the Senco where it is easy to get to and use a quick disconnect with a
> check valve so you can grab it to inflate tires or anything else around
> your coach.
>
> I had one of each in our two coaches and both work well.
>
> Jerry
> Jerry Work
> The Dovetail Joint
> Fine furniture designed & hand crafted
> in the 1907 former Masonic Temple building
> in historic Kerby, OR
> http://jerrywork.com
> ———-
> Date: Sun, 15 Jul 2018 12:33:49 -0700
> From: "Dean Hanson"
> To:
> Subject: [GMCnet] Alternate air pump
> Message-ID:
> Content-Type: text/plain; charset="us-ascii"
>
> Looking for suggestions for an air pump to be used for my air tank to power
> the ride. Any alternative ideas welcome.
>
> 75 Avion
>
>
>
> Dean C. Hanson
>
> Fremont, Ca. 94536
> ——————
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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1978 Palm Beach.
Detroit Michigan
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| Re: [GMCnet] Alternate,air pump [message #335270 is a reply to message #335239] |
Mon, 16 July 2018 15:48 |
77Royale
Messages: 461
Registered: June 2014
Location: Mid Michigan
Karma: 6
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Senior Member |
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I recently put in a Viair 480C and a 2.5 gallon viair tank. The compressor fits in the OEM aluminum box and the tank fits nicely under the driver side lower bunk with a water trap in between. (Royale Rear bath).
Had enough ports on the tank to install a new pressure switch with built in relay, and gauge, safety valve, drain valve, and a quick disconnect for an air hose. Can do Bags, tires, mattresses, blow gun etc. All neatly tucked away.
The new compressor fills the empty tank and shuts down in about a minute (100PSI). Very happy with the set up. Thanks to Justin Brady for the aux larger tank idea.
Also ran the power wire direct from the onan battery in the rear to reduce the voltage drop.
77 Royale, Rear Dry Bath. 403, 3.55 Final Drive, Lenzi goodies, Patterson carb and dizzy.
Mid Michigan
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| Re: [GMCnet] Alternate,air pump [message #335292 is a reply to message #335270] |
Tue, 17 July 2018 07:55 |
Justin Brady
Messages: 769
Registered: April 2015
Location: Bell Buckle, TN
Karma: 11
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Senior Member |
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I also run a 480C and a 2.5 Gal tank. Works great.
I run mine at 160psi, makes inflating tires and air bags faster.
I've got a quick connect on the tank and a 50ft coil hose for filling tires or inflatables etc. It will even run my impact for changing tires if you're patient.
Justin Brady
http://www.thegmcrv.com/
1976 Palm Beach 455
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| Re: [GMCnet] Alternate,air pump [message #335295 is a reply to message #335292] |
Tue, 17 July 2018 08:38 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Just as another example of what one CAN do:
My 12 VDC air system runs a Puma compressor (apparently NLA - similar to
Viair 480C). It performs very nicely for normal operations.
Since I always lower the rear suspension when dumping the holding tanks, to
expedite the process, I wanted faster return to ride height. I had an old
Craftsman 120 vac "bowling bag" compressor. When I disassembled what I'd
always figured was a diaphragm compressor, I found a nice little piston
compressor. To make it fit available space behind the refrigerator (my 23'
requires careful space planning), I repackaged it in a custom Lexan box.
It's equipped with a quick disconnect and toggle switch for tires, etc.
Its main control, however, is a "Raise" push button beside the controls for
my two macerators (black & grey water). Also located there are independent
momentary "Lower" switches for the left and right air bags, so I can tilt
the coach to fit the terrain. After dumping, pushing the "Raise" button
routes the compressor output, through check valves, directly into both air
bags. Full down to full up takes about 30 seconds. I do have to have
either the 1500W inverter or the generator running, of course.
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI & EBL,
Manny Brakes & 1-Ton, Troy-Bilt APU, etc., etc., etc.
www.gmcwipersetc.com
>
>
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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] Alternate,air pump [message #335298 is a reply to message #335295] |
Tue, 17 July 2018 09:27 |
Justin Brady
Messages: 769
Registered: April 2015
Location: Bell Buckle, TN
Karma: 11
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Senior Member |
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I like the idea of putting lowering switches at the macerator plate, that's clever! I may "borrow" that idea.
I lower before dumping and then have my wife switch to auto while I'm putting up the hose to get to ride height. With the 160psi and the 2.5 gal tank it takes under 30 sec to refill and be on the way.
Justin Brady
http://www.thegmcrv.com/
1976 Palm Beach 455
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| Re: [GMCnet] Alternate,air pump [message #335299 is a reply to message #335295] |
Tue, 17 July 2018 09:36 |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
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Senior Member |
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We run dual 480C compressors. They each have an AUTO-OFF-MANUAL ON switch. Runnning both does the job quickly. Along with the compressors I have an auxilary air system that has quick disconnect outlets under the hood and in each rear compartment. Also one in the closet. This auxilary system has a shutoff valve.
Note: if you hear a real loud repeating momentary SCREECH it means you have a compressor switch ON. The screech is the pressure relief valve. Don't ask how I know.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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| Re: [GMCnet] Alternate,air pump [message #335300 is a reply to message #335298] |
Tue, 17 July 2018 09:38 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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On my wireless system, there is a remote control that you can carry in your
pocket. It has 2 preset buttons. One for correct ride height, and one for
dump height. A simple push of the thumb, and you are all set.
Jim Hupy
Salem, Or
On Tue, Jul 17, 2018, 7:28 AM Justin Brady wrote:
> I like the idea of putting lowering switches at the macerator plate,
> that's clever! I may "borrow" that idea.
>
> I lower before dumping and then have my wife switch to auto while I'm
> putting up the hose to get to ride height. With the 160psi and the 2.5 gal
> tank
> it takes under 30 sec to refill and be on the way.
>
> --
> Justin Brady
> http://www.thegmcrv.com/
> 1976 Palm Beach 455
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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| Re: [GMCnet] Alternate,air pump [message #335303 is a reply to message #335300] |
Tue, 17 July 2018 09:54 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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One word of caution on the Vi-Air compressors. They are capable of 200 psi.
That is quite a bit more pressure than the GMC stock systems put out. You
should probably limit the output with a pop off valve set near the OEM
upper limit. 40 year old air systems could easily be over stressed with too
much pressure.
Jim Hupy
Salem, Or
On Tue, Jul 17, 2018, 7:38 AM James Hupy wrote:
> On my wireless system, there is a remote control that you can carry in
> your pocket. It has 2 preset buttons. One for correct ride height, and one
> for dump height. A simple push of the thumb, and you are all set.
> Jim Hupy
> Salem, Or
>
> On Tue, Jul 17, 2018, 7:28 AM Justin Brady wrote:
>
>> I like the idea of putting lowering switches at the macerator plate,
>> that's clever! I may "borrow" that idea.
>>
>> I lower before dumping and then have my wife switch to auto while I'm
>> putting up the hose to get to ride height. With the 160psi and the 2.5 gal
>> tank
>> it takes under 30 sec to refill and be on the way.
>>
>> --
>> Justin Brady
>> http://www.thegmcrv.com/
>> 1976 Palm Beach 455
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
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| Re: [GMCnet] Alternate,air pump [message #335323 is a reply to message #335315] |
Tue, 17 July 2018 17:47 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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One thing you ALL better consider:
If the GMC shops are not familier with what you put on the coach, the next
customer will be upset when we tell them were not familier and will need to
charge them to obtain information.
It is a free country, but putting unknown items on the coach is
inconsiderate.
On Tue, Jul 17, 2018 at 12:51 PM, Justin Brady wrote:
> Very Cool Ken!
> Mine is mounted in the genset compartment.
> http://www.thegmcrv.com/wp-content/uploads/2018/07/IMG_
> 20180603_191039-1012x759.jpg
> No picture of it mounted yet.
>
> Ken Henderson wrote on Tue, 17 July 2018 11:35
>> Justin,
>>
>> I probably should have included a parenthetical location of the macerator
>> and level control switches (behind a '70's GM car flip-down license plate
>> holder). This photo shows the original installation to only control one
>> macerator; it's since been upgraded to the other 5 switches:
>> http://www.gmcmhphotos.com/photos/birchaven-macerator/p364.html
>>
>> VERY convenient location.
>>
>> Ken H.
>>
>> On Tue, Jul 17, 2018 at 10:28 AM Justin Brady wrote:
>>
>>> I like the idea of putting lowering switches at the macerator plate,
>>> that's clever! I may "borrow" that idea.
>>>
>>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
>
> --
> Justin Brady
> http://www.thegmcrv.com/
> 1976 Palm Beach 455
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Alternate,air pump [message #335343 is a reply to message #335303] |
Wed, 18 July 2018 08:51 |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
Karma: 0
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Senior Member |
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Why would you EVER run ANY air compressor without a pressure switch??
Thats just asking for trouble, don't do it. The over pressure valve is not designed for multiple cycles!
Even manual mode should just enable the pressure switch, not over ride it.
Better than wire less air, MicroLevels RF remote allows individual height control of both sides, so you can tilt the coach for dumping. This even works with the ignition off as MicroLevel wakesup on a button press, enables the compressor and opens the valve(s).
Not to mention true height control and campground leveling.
Keith Vasilakes
75 ex Roylae
MicroLevel
________________________________
From: Gmclist on behalf of James Hupy
Sent: Tuesday, July 17, 2018 9:54 AM
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] Alternate,air pump
One word of caution on the Vi-Air compressors. They are capable of 200 psi.
That is quite a bit more pressure than the GMC stock systems put out. You
should probably limit the output with a pop off valve set near the OEM
upper limit. 40 year old air systems could easily be over stressed with too
much pressure.
Jim Hupy
Salem, Or
On Tue, Jul 17, 2018, 7:38 AM James Hupy wrote:
> On my wireless system, there is a remote control that you can carry in
> your pocket. It has 2 preset buttons. One for correct ride height, and one
> for dump height. A simple push of the thumb, and you are all set.
> Jim Hupy
> Salem, Or
>
> On Tue, Jul 17, 2018, 7:28 AM Justin Brady wrote:
>
>> I like the idea of putting lowering switches at the macerator plate,
>> that's clever! I may "borrow" that idea.
>>
>> I lower before dumping and then have my wife switch to auto while I'm
>> putting up the hose to get to ride height. With the 160psi and the 2.5 gal
>> tank
>> it takes under 30 sec to refill and be on the way.
>>
>> --
>> Justin Brady
>> http://www.thegmcrv.com/
>> 1976 Palm Beach 455
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
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Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
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| Re: [GMCnet] Alternate,air pump [message #335347 is a reply to message #335343] |
Wed, 18 July 2018 10:23 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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The wireless air system ALSO allows for side to side leveling, as well as
front to rear. With the added feature of one touch return to pre-set ride
height when through with campsite leveling or tank dumping chores. Just for
clarification.
Jim Hupy
Salem, Or.
On Wed, Jul 18, 2018, 6:52 AM Keith V wrote:
> Why would you EVER run ANY air compressor without a pressure switch??
> Thats just asking for trouble, don't do it. The over pressure valve is not
> designed for multiple cycles!
> Even manual mode should just enable the pressure switch, not over ride it.
>
> Better than wire less air, MicroLevels RF remote allows individual height
> control of both sides, so you can tilt the coach for dumping. This even
> works with the ignition off as MicroLevel wakesup on a button press,
> enables the compressor and opens the valve(s).
> Not to mention true height control and campground leveling.
>
> Keith Vasilakes
> 75 ex Roylae
> MicroLevel http://www.gmcmotorhomemarketplace.com/vasilakes/microlevel_intro.pdf>
> ________________________________
> From: Gmclist on behalf of James Hupy jamesh1296@gmail.com>
> Sent: Tuesday, July 17, 2018 9:54 AM
> To: gmclist@list.gmcnet.org
> Subject: Re: [GMCnet] Alternate,air pump
>
> One word of caution on the Vi-Air compressors. They are capable of 200 psi.
> That is quite a bit more pressure than the GMC stock systems put out. You
> should probably limit the output with a pop off valve set near the OEM
> upper limit. 40 year old air systems could easily be over stressed with too
> much pressure.
> Jim Hupy
> Salem, Or
>
> On Tue, Jul 17, 2018, 7:38 AM James Hupy wrote:
>
>> On my wireless system, there is a remote control that you can carry in
>> your pocket. It has 2 preset buttons. One for correct ride height, and
> one
>> for dump height. A simple push of the thumb, and you are all set.
>> Jim Hupy
>> Salem, Or
>>
>> On Tue, Jul 17, 2018, 7:28 AM Justin Brady wrote:
>>
>>> I like the idea of putting lowering switches at the macerator plate,
>>> that's clever! I may "borrow" that idea.
>>>
>>> I lower before dumping and then have my wife switch to auto while I'm
>>> putting up the hose to get to ride height. With the 160psi and the 2.5
> gal
>>> tank
>>> it takes under 30 sec to refill and be on the way.
>>>
>>> --
>>> Justin Brady
>>> http://www.thegmcrv.com/
>>> 1976 Palm Beach 455
>>>
>>> _______________________________________________
>>> 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
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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| Re: [GMCnet] Alternate,air pump [message #335363 is a reply to message #335343] |
Wed, 18 July 2018 15:58 |
 |
USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Keith,
To me the MOST important thing about the MicroLevel system is that it works like the OEM system and controls ride height through
sensors that adjust the attitude of the coach as you go down the road. If you are on a road that is highly crowned it will raise the
curb side automatically with no input from the driver just like the OEM system.
Regards,
Rob M.
The Pedantic Mechanic
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808
-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Keith V
Sent: Wednesday, July 18, 2018 8:52 AM
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] Alternate,air pump
Why would you EVER run ANY air compressor without a pressure switch??
Thats just asking for trouble, don't do it. The over pressure valve is not designed for multiple cycles!
Even manual mode should just enable the pressure switch, not over ride it.
Better than wire less air, MicroLevels RF remote allows individual height control of both sides, so you can tilt the coach for
dumping. This even works with the ignition off as MicroLevel wakesup on a button press, enables the compressor and opens the
valve(s).
Not to mention true height control and campground leveling.
Keith Vasilakes
75 ex Roylae
MicroLevel
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Alternate,air pump [message #335369 is a reply to message #335363] |
Wed, 18 July 2018 19:33 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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Rob, the OEM systems ride height is ( are) controlled in two ways.
1. The original early system was entirely operated by air pressure
and left and right hydraulic/pneumatic height control valves that sensed
movement of the frame height when the load in the coach either increased or
decreased. That moved the linkage attached to the height control valves.
Built into the valves was a time delay of up to 18 seconds before any air
was let into the air bag or out of it. In addition, there was a null space
of + or- 3/8" where the frame could move up or down without anything
happening. That is a dead space of 3/4" in the center of the travel. Small
road shocks of a duration of less than 18 seconds never activate this
system.
2. The second generation of height control used the same height
control valves, and had the same operating parameters as the one I
described above. Differences in these two systems were that rocker switches
replaced the original round knob air valves in the dash, and added
solenoids with valves to control the inlet and exhaust of air to the height
control valves. Same null space and time delay as the original system.
3. Finally, the Electro Level II system came out. Totally electric in
control of ride height. Used LED light sources aligned with photo
transistors to open and close electrical circuits that either opened
exhaust valves or started smaller compressors to raise or lower the coach.
Manual controls in the form of rocker switches allows the operator to raise
or lower the coach as required. The null point is narrowed to 5° of travel,
and the time delay is lengthened to a max of 28 seconds before anything
happens. Shutter wheels attached to linkage either block the led's or
expose them to the photo transistors.
Small road shocks, swales of short duration (less than 28 seconds) do
nothing to activate the system. All this information is from GMC manuals,
not from my foggy brain. What does change ride height is inputs from the
driver through the rocker switches, or changes in loads in the coach.
Jim Hupy
Salem, Or
On Wed, Jul 18, 2018, 1:59 PM Rob Mueller wrote:
> Keith,
>
> To me the MOST important thing about the MicroLevel system is that it
> works like the OEM system and controls ride height through
> sensors that adjust the attitude of the coach as you go down the road. If
> you are on a road that is highly crowned it will raise the
> curb side automatically with no input from the driver just like the OEM
> system.
>
> Regards,
> Rob M.
> The Pedantic Mechanic
> Sydney, Australia
> AUS '75 Avion - The Blue Streak TZE365V100428
> USA '75 Avion - Double Trouble TZE365V100426
> USA '77 Kingsley - TZE 267V100808
>
> -----Original Message-----
> From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Keith
> V
> Sent: Wednesday, July 18, 2018 8:52 AM
> To: gmclist@list.gmcnet.org
> Subject: Re: [GMCnet] Alternate,air pump
>
> Why would you EVER run ANY air compressor without a pressure switch??
> Thats just asking for trouble, don't do it. The over pressure valve is not
> designed for multiple cycles!
> Even manual mode should just enable the pressure switch, not over ride it.
>
> Better than wire less air, MicroLevels RF remote allows individual height
> control of both sides, so you can tilt the coach for
> dumping. This even works with the ignition off as MicroLevel wakesup on a
> button press, enables the compressor and opens the
> valve(s).
> Not to mention true height control and campground leveling.
>
> Keith Vasilakes
> 75 ex Roylae
> MicroLevel http://www.gmcmotorhomemarketplace.com/vasilakes/microlevel_intro.pdf>
>
>
>
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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| Re: [GMCnet] Alternate,air pump [message #335371 is a reply to message #335369] |
Wed, 18 July 2018 21:43 |
|
USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
|
Senior Member |
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Jim,
Was I incorrect when I stated "works like the OEM system and controls ride height through sensors that adjust the attitude of the coach as you go down the road. If you are on a road that is highly crowned it will raise the curb side automatically with no input from the driver?"
Regards,
Rob M.
The Pedantic Mechanic
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808
-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of James Hupy
Sent: Wednesday, July 18, 2018 7:34 PM
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] Alternate,air pump
Rob, the OEM systems ride height is ( are) controlled in two ways.
1. The original early system was entirely operated by air pressure
and left and right hydraulic/pneumatic height control valves that sensed
movement of the frame height when the load in the coach either increased or
decreased. That moved the linkage attached to the height control valves.
Built into the valves was a time delay of up to 18 seconds before any air
was let into the air bag or out of it. In addition, there was a null space
of + or- 3/8" where the frame could move up or down without anything
happening. That is a dead space of 3/4" in the center of the travel. Small
road shocks of a duration of less than 18 seconds never activate this
system.
2. The second generation of height control used the same height
control valves, and had the same operating parameters as the one I
described above. Differences in these two systems were that rocker switches
replaced the original round knob air valves in the dash, and added
solenoids with valves to control the inlet and exhaust of air to the height
control valves. Same null space and time delay as the original system.
3. Finally, the Electro Level II system came out. Totally electric in
control of ride height. Used LED light sources aligned with photo
transistors to open and close electrical circuits that either opened
exhaust valves or started smaller compressors to raise or lower the coach.
Manual controls in the form of rocker switches allows the operator to raise
or lower the coach as required. The null point is narrowed to 5° of travel,
and the time delay is lengthened to a max of 28 seconds before anything
happens. Shutter wheels attached to linkage either block the led's or
expose them to the photo transistors.
Small road shocks, swales of short duration (less than 28 seconds) do
nothing to activate the system. All this information is from GMC manuals,
not from my foggy brain. What does change ride height is inputs from the
driver through the rocker switches, or changes in loads in the coach.
Jim Hupy
Salem, Or
On Wed, Jul 18, 2018, 1:59 PM Rob Mueller wrote:
> Keith,
>
> To me the MOST important thing about the MicroLevel system is that it
> works like the OEM system and controls ride height through
> sensors that adjust the attitude of the coach as you go down the road. If
> you are on a road that is highly crowned it will raise the
> curb side automatically with no input from the driver just like the OEM
> system.
>
> Regards,
> Rob M.
> The Pedantic Mechanic
> Sydney, Australia
> AUS '75 Avion - The Blue Streak TZE365V100428
> USA '75 Avion - Double Trouble TZE365V100426
> USA '77 Kingsley - TZE 267V100808
>
> -----Original Message-----
> From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Keith
> V
> Sent: Wednesday, July 18, 2018 8:52 AM
> To: gmclist@list.gmcnet.org
> Subject: Re: [GMCnet] Alternate,air pump
>
> Why would you EVER run ANY air compressor without a pressure switch??
> Thats just asking for trouble, don't do it. The over pressure valve is not
> designed for multiple cycles!
> Even manual mode should just enable the pressure switch, not over ride it.
>
> Better than wire less air, MicroLevels RF remote allows individual height
> control of both sides, so you can tilt the coach for
> dumping. This even works with the ignition off as MicroLevel wakesup on a
> button press, enables the compressor and opens the
> valve(s).
> Not to mention true height control and campground leveling.
>
> Keith Vasilakes
> 75 ex Roylae
> MicroLevel http://www.gmcmotorhomemarketplace.com/vasilakes/microlevel_intro.pdf>
>
>
>
>
>
> _______________________________________________
> 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
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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When I put the ViAir on the 23' I kept the original shutoff switch for just that reason.
