| Re: [GMCnet] Hensley GMC Motorhome Airbag Solution [message #118449] |
Fri, 11 March 2011 14:51 |
Gary Casey
Messages: 448
Registered: September 2009
Karma:
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Senior Member |
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Marsha,
I'm not sure I understand the question completely, but I believe it relates to
the Q-bag or similar suspension where it is desired to pump up one of the bags
to support the complete load. I don't know how they are plumbed, but I assume
the best way to shut off the bag not being filled and then go to the front and
turn the control valve to "raise." That uses the internal air system. If you
want to pump it up with an external pump (I do this every time before a trip),
there is usually a shrader valve on the air tank in front of the left front
wheel. If there isn't put one in. The air will go through the system and pump
up just the bag you want. Yes, putting a shrader valve on the bag itself can be
a bit risky, especially if you are attempting to over-pressure it to hold more
load.
Gary Casey
Marsha <makeminetea@yahoo.com>
How do I bypass the air pump so I can pump up the air bags with a stand alone
air?compressor?
Marsha73 23'hence forth to be calledol yellr
--- On Thu, 3/10/11, Gary Casey <casey.gary@yahoo.com> wrote:
I still don't know how the system physically carries the load.? The air pressure
is not that far below the compressor pressure during normal operation - how do
you put maybe 50 to 70% more air pressure in the bag to carry the load?? The
only way I can think of is to jack the coach to the max height, fill the bag
with the max pressure and then let it down.? Is that the way it's done?? If so,
the jack you presumably don't need because of the Q-bag is still required to
lift the coach.
Gary Casey
'74 23' lightweight
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