Home » Public Forums » GMCnet » Suspension pump
| Suspension pump [message #158408] |
Sun, 29 January 2012 10:55  |
Larry
Messages: 2875
Registered: January 2004
Location: Menomonie, WI
Karma: 10
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Senior Member |
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I replaced the original suspension pump about 8 yrs ago with...whatever was recommended at the time. It takes a longer time than I'd like for that thing to raise the suspension. I'd like to re[lace the pump with one that is of a higher capacity. What are you'all using for a little faster rise?
Larry 
78 Royale w/500 Caddy
Menomonie, WI.
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| Re: [GMCnet] Suspension pump [message #158419 is a reply to message #158408] |
Sun, 29 January 2012 11:38  |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Larry,
Because my original holding tank plumbing required lowering the rear of the
coach to fully drain the tank, I needed fast bag inflation. Even with a
good 12 VDC compressor, full down to full up took about 4 minutes.
I had an old Craftsman no-tank 1-1/2 hp compressor that I'd always thought
was a diaphragm type. Deciding to try to reduce its size, I removed the
bulbous plastic housing and found a very nice little oil-less piston
compressor with attached motor. To fit the space behind the refrigerator,
I fabricated an enclosure from 1/4" sheet Lexan, with adequate screened
ventilation and an internal 12 VDC power relay.
That compressor, running from the coach inverter or shore power will raise
the rear from full down to full up in just over 30 seconds.
I now have separate gray and black water macerators each with a switch
behind the flip-down tag mount. Beside them are L&R Lower switches which
control, through diodes, the EL-I lower solenoid valves. Then there's a
Raise push button to control the 120vac compressor's 12VDC relay, causing
it to inflate the bags through check valves.
Really a lot simpler than it sounds and keeps me from holding up the line
if I'm at a dump station. I still use the 12 VDC compressor for normal
operation, but it would be trivially simple to wire the 120 vac for either
full time, or momentary, use -- just control the 12 VDC relay.
You may want to at least try the 120vac compressor portion, especially if
you have a 1000W or better inverter already. A low cost one (inverter &/or
compressor) from HF should be adequate.
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI+ & EBL
www.gmcwipersetc.com
On Sun, Jan 29, 2012 at 11:55 AM, Larry wrote:
>
>
> I replaced the original suspension pump about 8 yrs ago with...whatever
> was recommended at the time. It takes a longer time than I'd like for that
> thing to raise the suspension. I'd like to re[lace the pump with one that
> is of a higher capacity. What are you'all using for a little faster rise?
>
> --
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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] Suspension pump [message #158817 is a reply to message #158419] |
Tue, 31 January 2012 22:03 |
Larry
Messages: 2875
Registered: January 2004
Location: Menomonie, WI
Karma: 10
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Senior Member |
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| Ken Henderson wrote on Sun, 29 January 2012 11:38 |
Larry,
Because my original holding tank plumbing required lowering the rear of the
coach to fully drain the tank, I needed fast bag inflation. Even with a
good 12 VDC compressor, full down to full up took about 4 minutes.
I had an old Craftsman no-tank 1-1/2 hp compressor that I'd always thought
was a diaphragm type. Deciding to try to reduce its size, I removed the
bulbous plastic housing and found a very nice little oil-less piston
compressor with attached motor. To fit the space behind the refrigerator,
I fabricated an enclosure from 1/4" sheet Lexan, with adequate screened
ventilation and an internal 12 VDC power relay.
That compressor, running from the coach inverter or shore power will raise
the rear from full down to full up in just over 30 seconds.
I now have separate gray and black water macerators each with a switch
behind the flip-down tag mount. Beside them are L&R Lower switches which
control, through diodes, the EL-I lower solenoid valves. Then there's a
Raise push button to control the 120vac compressor's 12VDC relay, causing
it to inflate the bags through check valves.
Really a lot simpler than it sounds and keeps me from holding up the line
if I'm at a dump station. I still use the 12 VDC compressor for normal
operation, but it would be trivially simple to wire the 120 vac for either
full time, or momentary, use -- just control the 12 VDC relay.
You may want to at least try the 120vac compressor portion, especially if
you have a 1000W or better inverter already. A low cost one (inverter &/or
compressor) from HF should be adequate.
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI+ & EBL
www.gmcwipersetc.com
On Sun, Jan 29, 2012 at 11:55 AM, Larry wrote:
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Thanks Ken,
I thought more would be interested in this. Thought maybe someone would suggest the AC compressor that was used years ago in Jeeps and AMC cars. I have two of them. I know others have done this using a 12v starter to power it, but cannot remember who. Maybe someone remembers??
Larry
78 Royale w/500 Caddy
Menomonie, WI.
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| Re: [GMCnet] Suspension pump [message #158834 is a reply to message #158817] |
Wed, 01 February 2012 06:53 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Larry,
It was the same now-deceased GMCer who made the laser pointer alignment
system who sold the starter-driven York compressors. I too have one of the
compressors but never got around to rigging a motor to it. The guy's name
will come to me about midnight tonight, out of nowhere (literally). :-)
Ken H.
On Tue, Jan 31, 2012 at 11:03 PM, Larry wrote:
> ...
> I thought more would be interested in this. Thought maybe someone would
> suggest the AC compressor that was used years ago in Jeeps and AMC cars. I
> have two of them. I know others have done this using a 12v starter to power
> it, but cannot remember who. Maybe someone remembers??
> --
>
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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] Suspension pump [message #158843 is a reply to message #158834] |
Wed, 01 February 2012 08:09 |
Surbo
Messages: 213
Registered: February 2004
Karma: 0
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Senior Member |
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| Ken Henderson wrote on Wed, 01 February 2012 06:53 |
Larry,
It was the same now-deceased GMCer who made the laser pointer alignment
system who sold the starter-driven York compressors. I too have one of the
compressors but never got around to rigging a motor to it. The guy's name
will come to me about midnight tonight, out of nowhere (literally).
Ken H.
On Tue, Jan 31, 2012 at 11:03 PM, Larry wrote:
> ...
> I thought more would be interested in this. Thought maybe someone would
> suggest the AC compressor that was used years ago in Jeeps and AMC cars. I
> have two of them. I know others have done this using a 12v starter to power
> it, but cannot remember who. Maybe someone remembers??
> --
>
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Darcy Moses of MN made these compressors, some had a Ford starter motor and some were a Chev Vega strtr motor. He made a neat door pin removal tool. Darcy had a lot more items in the works that he never got into production, I have some of those prototypes. His compressors really did the job, my opinion, now there are now better choices for a compressor for a MH.
Bob Drewes in SESD
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| Re: [GMCnet] Suspension pump [message #158869 is a reply to message #158817] |
Wed, 01 February 2012 12:12 |
powerjon
Messages: 2446
Registered: January 2004
Karma: 5
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Senior Member |
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I bought and install the Darcy Moses air system in 1998 on the 77 Eleganza II that was sold last year. It was great and could inflate the air bags into about 30 sec. I could also run small air tools. The 75 Avion also has a york style compressor driven by a belt off the alternator. The 78 stretch uses a air compressor that is also used on big trucks and is lubed with engine oil. All are a great improvement over the Dana. It is a shame that no one has continued with the Darcy Moses system. It is a great addition to the coach.
J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 Buskirk 30' Stretch
1975 Avion (Under Reconstruction)
Michigan
On the road in Tucson
On Jan 31, 2012, at 9:03 PM, Larry wrote:
>
>
> Ken Henderson wrote on Sun, 29 January 2012 11:38
>> Larry,
>>
>> Because my original holding tank plumbing required lowering the rear of the
>> coach to fully drain the tank, I needed fast bag inflation. Even with a
>> good 12 VDC compressor, full down to full up took about 4 minutes.
>>
>> I had an old Craftsman no-tank 1-1/2 hp compressor that I'd always thought
>> was a diaphragm type. Deciding to try to reduce its size, I removed the
>> bulbous plastic housing and found a very nice little oil-less piston
>> compressor with attached motor. To fit the space behind the refrigerator,
>> I fabricated an enclosure from 1/4" sheet Lexan, with adequate screened
>> ventilation and an internal 12 VDC power relay.
>>
>> That compressor, running from the coach inverter or shore power will raise
>> the rear from full down to full up in just over 30 seconds.
>>
>> I now have separate gray and black water macerators each with a switch
>> behind the flip-down tag mount. Beside them are L&R Lower switches which
>> control, through diodes, the EL-I lower solenoid valves. Then there's a
>> Raise push button to control the 120vac compressor's 12VDC relay, causing
>> it to inflate the bags through check valves.
>>
>> Really a lot simpler than it sounds and keeps me from holding up the line
>> if I'm at a dump station. I still use the 12 VDC compressor for normal
>> operation, but it would be trivially simple to wire the 120 vac for either
>> full time, or momentary, use -- just control the 12 VDC relay.
>>
>> You may want to at least try the 120vac compressor portion, especially if
>> you have a 1000W or better inverter already. A low cost one (inverter &/or
>> compressor) from HF should be adequate.
>>
>> Ken H.
>> Americus, GA
>> '76 X-Birchaven w/Cad500/Howell EFI+ & EBL
>> www.gmcwipersetc.com
>>
>> On Sun, Jan 29, 2012 at 11:55 AM, Larry wrote:
>
> Thanks Ken,
> I thought more would be interested in this. Thought maybe someone would suggest the AC compressor that was used years ago in Jeeps and AMC cars. I have two of them. I know others have done this using a 12v starter to power it, but cannot remember who. Maybe someone remembers??
> --
> Larry :)
> 78 Royale w/500 Caddy
> Menomonie, WI.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List 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] Suspension pump [message #158886 is a reply to message #158869] |
Wed, 01 February 2012 15:58 |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
Karma: 0
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Senior Member |
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| powerjon wrote on Wed, 01 February 2012 12:12 |
I bought and install the Darcy Moses air system in 1998 on the 77 Eleganza II that was sold last year. It was great and could inflate the air bags into about 30 sec. I could also run small air tools. The 75 Avion also has a york style compressor driven by a belt off the alternator. The 78 stretch uses a air compressor that is also used on big trucks and is lubed with engine oil. All are a great improvement over the Dana. It is a shame that no one has continued with the Darcy Moses system. It is a great addition to the coach.
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I have a York that I'd love to use as an air pump for the GMC, the problem is just time and how to get a belt drive on a starter motor.
If anyone has one of his systems working or not or parts of one, I'd love to build one or two copies
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: Suspension pump [message #158922 is a reply to message #158408] |
Wed, 01 February 2012 22:27 |
Charles
Messages: 455
Registered: January 2004
Karma: 0
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Senior Member |
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I was told standard car starters will not hold up to long cranking some times associated with York compressor systems.
Starer /generators are designed for continues run so I suggest anyone building your own unit consider a starter generator like are used on golf carts. Here is more information about your air compressor systems. http://www.onboardair.com/york.htm
Charles
Charles Wersal
Duncanville, Texas
26 foot 1975 Glenbrook
Pandora's Box
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| Re: Suspension pump [message #158929 is a reply to message #158922] |
Wed, 01 February 2012 23:08 |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
Karma: 0
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Senior Member |
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| Charles wrote on Wed, 01 February 2012 22:27 |
I was told standard car starters will not hold up to long cranking some times associated with York compressor systems.
Starer /generators are designed for continues run so I suggest anyone building your own unit consider a starter generator like are used on golf carts. Here is more information about your air compressor systems. http://www.onboardair.com/york.htm
Charles
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Makes sense, where do you get the starter / generator?
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] Suspension pump [message #158963 is a reply to message #158962] |
Thu, 02 February 2012 10:25 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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Senior Member |
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You could by a 12v golf cart starter.
Sully
77 Royale
On Thu, Feb 2, 2012 at 8:12 AM, Larry <weidnerl@wwt.net> wrote:
>
>
> Keith V wrote on Wed, 01 February 2012 15:58
> > powerjon wrote on Wed, 01 February 2012 12:12
> > > I bought and install the Darcy Moses air system in 1998 on the 77
> Eleganza II that was sold last year. It was great and could inflate the
> air bags into about 30 sec. I could also run small air tools. The 75
> Avion also has a york style compressor driven by a belt off the alternator.
> The 78 stretch uses a air compressor that is also used on big trucks and
> is lubed with engine oil. All are a great improvement over the Dana. It
> is a shame that no one has continued with the Darcy Moses system. It is a
> great addition to the coach.
> >
> >
> > I have a York that I'd love to use as an air pump for the GMC, the
> problem is just time and how to get a belt drive on a starter motor.
> > If anyone has one of his systems working or not or parts of one, I'd
> love to build one or two copies
>
> That's my big question, how DO you get a belt drive on a starter motor?
> --
> Larry :)
> 78 Royale w/500 Caddy
> Menomonie, WI.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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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] Suspension pump [message #158998 is a reply to message #158964] |
Thu, 02 February 2012 17:26 |
John Wright
Messages: 118
Registered: September 2008
Karma: 0
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Senior Member |
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As Emory has said that is how it is done. When I replaced the small pulley last spring the pulley just bolted on.
J.R. Wright
GMC GreatLaker
Newsletter Editor/Publisher
78 Buskirk 30' Stretch
75 Avion Under Reconstruction
Michigan
On Feb 2, 2012, at 9:34 AM, Emery Stora wrote:
>
> On Feb 2, 2012, at 9:12 AM, Larry wrote:
>>
>> That's my big question, how DO you get a belt drive on a starter motor?
>>
> Once you remove the gear from the end of the starter shaft you should be able to put on a common pulley that you can find at a hardware store. They have set screws that fasten it to the shaft.
>
> I used an Onan starter motor, cut off the bearing housing at the end and fashioned another bearing at the face of the motor and mounted a pulley to the end of the shaft.
>
> Emery Stora
> 77 Kingsley
> Santa Fe, NM
>
>
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| Re: [GMCnet] Suspension pump [message #159030 is a reply to message #159007] |
Thu, 02 February 2012 20:09 |
Dave Mumert
Messages: 272
Registered: February 2004
Location: Olds, AB, Canada
Karma: 0
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Senior Member |
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Hi Rob
Winch motors might also work.
Dave
> -----Original Message-----
> I just did an eBay search for "golf cart motor" and was blown away at the
> prices!
>
> For the most part they were 48 / 36 / 24 VDC.
>
> I found these 12 VDC units:
>
> 310340106636
>
> 280817347418 - Seller not sure what the voltage is.
>
> Regards,
> Rob M.
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