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Re: [GMCnet] Got Double Trouble weighed at a CAT Scale [message #181812 is a reply to message #181757] Sun, 26 August 2012 06:20 Go to previous messageGo to previous message
Steven Ferguson is currently offline  Steven Ferguson   United States
Messages: 3447
Registered: May 2006
Karma:
Senior Member
Looks like you need to go on a diet Rob and lose about 4,000 lbs:>)

On Sat, Aug 25, 2012 at 5:26 PM, Rob Mueller <robmueller@iinet.net.au>wrote:

> G'day,
>
> Got Double Trouble weighed at a CAT Scale yesterday:
>
> Weight # 1 - Pulled up with the front wheels on the front scale pad (Steer
> Axle) and the rear wheels were on the second scale pad
> (Drive Axle)
>
> Steer Axle = 4400
>
> Drive Axle = 8140
>
> Total = 12540
>
> I was sitting in the drivers seat and weigh 250 (+/-); Helen was NOT in
> the pax seat (she weighs 135 (+/-).
>
> Weight # 2 - Pulled up so that the driver side wheels were off the scales
> completely. The passenger side front wheel was on the
> second scale pad (Drive Axle) and the rear wheels were on the third scale
> pad (Trailer Axle)
>
> Drive Axle = 2320
>
> Trailer Axle = 3900
>
> Total = 6220
>
> I was not in the coach.
>
> Weight #3 - Pulled up so that the passenger side wheels were off the
> scales completely. The driver side front wheel was on the
> second scale pad (Drive Axle) and the rear wheels were on the third scale
> pad (Trailer Axle)
>
> Drive Axle = 1740
>
> Trailer Axle = 4260
>
> Total = 6000
>
> I was not in the coach.
>
> Compared to the late GMC specs (I chose these cause the data looked
> better) it looks like this:
>
> Specifications Double Trouble
>
> Front curb = 3750
>
> Front cargo = 750
> & Pax Load
>
> Total = 4500 4400
>
> Rear curb = 6820
>
> Rear cargo = 1180
> & Pax Load
>
> Total = 12,500 12540
>
> Right / left imbalance spec:
>
> Front: 250
>
> Rear: 600
>
> Double Trouble
>
> Front: 2320 - 1740 = 580
>
> Rear: 4260 - 3900 = 360
>
> This makes sense because:
>
> I have the five draw tool box and a lot of other heavy crap under the
> dinette.
>
> The water tank was full.
>
> Furthermore I had to order an extended length pork chop adjustment bolt
> from JimK. When John and I set the front ride height the one
> on the passenger side was almost out of threads whereas the one on the
> drivers side was WAY further out!
>
> I think he slight difference in numbers is due to the fact that did not
> center the wheels to be weighed in the middle of the scales
> when I weighed each side.
>
> They charged me $9.50 for the first weight and $1.00 for each additional
> weight.
>
> Questions for the GMC Brain Trust:
>
> 1) Did GMC actually do anything to the suspension system to up the GAWR
> and GVWR or just "pencil whip it?"
>
> 2) Does my supposition about not having the wheels centered on the scales
> hold water?
>
> 3) Does anyone think there is anything to be gained by weighing the
> individual axles one by one?
>
> 4) Since this is cheap to do I think I'll try it again with both Helen and
> I in the coach and the wheels as close to the center of
> the scales as I can get them when I do the side weights. I don't like the
> 580 front differential; that delta would drop with both of
> us in the seats and it would be what it REALLY is.
>
> Regards,
> Rob M.
>
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--
Fathom the hypocrisy of a nation where every citizen must prove they have
health insurance......but not everyone has to prove they're a citizen.
Steve Ferguson
Sierra Vista, AZ
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