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[GMCnet] Rear Weight Balance [message #181264] Wed, 22 August 2012 09:19 Go to next message
Peter Garry is currently offline  Peter Garry   United States
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I have removed the 400lb Onan and do not intend to replace it. Now the water tank is on the other side and the generator space will be for general storage with outside access. Should I move the water tank to the centre? or can the suspension system compensate?

Peter Garry
Calgary
1973 23' (once a painted desert)

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Re: [GMCnet] Rear Weight Balance [message #181267 is a reply to message #181264] Wed, 22 August 2012 09:51 Go to previous messageGo to next message
Mr ERFisher is currently offline  Mr ERFisher   United States
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It does not care
Gene

FREE WIFI @ Mickey D





On Aug 22, 2012, at 7:19 AM, Peter Garry <petergarry@me.com> wrote:

> I have removed the 400lb Onan and do not intend to replace it. Now the water tank is on the other side and the generator space will be for general storage with outside access. Should I move the water tank to the centre? or can the suspension system compensate?
>
> Peter Garry
> Calgary
> 1973 23' (once a painted desert)
>
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Re: [GMCnet] Rear Weight Balance [message #181376 is a reply to message #181264] Wed, 22 August 2012 23:28 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
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Peter,

IIRC according to one of the GMC manuals the left / right balance is not greater than 250 pounds.

I learned this from ChuckB; if I learned wrong I trust he will correct me.

Regards,
Rob M.

-----Original Message-----
From: Peter Garry

I have removed the 400lb Onan and do not intend to replace it. Now the water tank is on the other side and the generator space will
be for general storage with outside access. Should I move the water tank to the centre? or can the suspension system compensate?

Peter

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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] Rear Weight Balance [message #181378 is a reply to message #181267] Thu, 23 August 2012 00:21 Go to previous messageGo to next message
bukzin is currently offline  bukzin   United States
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[quote title=Mr ERFisher wrote on Wed, 22 August 2012 07:51]It does not care
Gene

FREE WIFI @ Mickey D





Gene,

Is that because of the auto-leveling?

I understand they are not used with the 'wireless air' systems.




Should that change his solution?

Bukzin
1977 Palm Beach

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Re: [GMCnet] Rear Weight Balance [message #181379 is a reply to message #181378] Thu, 23 August 2012 00:41 Go to previous messageGo to next message
sgltrac is currently offline  sgltrac   United States
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The bags will inflate until the height control valve shuts off the flow. If one side is heavier than the other the shut off level remains unchanged so the heavier side bag may see more pressure but the coach will level nonetheless.

Sully
77 royale

Sent from my iPhone

On Aug 22, 2012, at 10:21 PM, Richard <bukzin@gmail.com> wrote:

>
>
> [quote title=Mr ERFisher wrote on Wed, 22 August 2012 07:51]It does not care
> Gene
>
> FREE WIFI @ Mickey D
>
>
>
>
>
> Gene,
>
> Is that because of the auto-leveling?
>
> I understand they are not used with the 'wireless air' systems.
>
>
>
>
> Should that change his solution?
>
> --
> Bukzin
> 1977 Palm Beach
> Chico California
> _______________________________________________
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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] Rear Weight Balance [message #181382 is a reply to message #181264] Thu, 23 August 2012 02:25 Go to previous messageGo to next message
Ken Burton is currently offline  Ken Burton   United States
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On almost every coach I have weighed the left rear side is heavier than the right.

Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana

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Re: [GMCnet] Rear Weight Balance [message #181384 is a reply to message #181264] Thu, 23 August 2012 05:27 Go to previous messageGo to next message
mike miller   United States
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Peter Garry wrote on Wed, 22 August 2012 07:19

I have removed the 400lb Onan and do not intend to replace it. Now the water tank is on the other side and the generator space will be for general storage with outside access. Should I move the water tank to the centre? or can the suspension system compensate? ...


Like most others have said, an operational “leveling” system should compensate. Ken noted that most coaches are a little heaver in the rear on the left side... mostly due to the Onan. While true with the few coaches I have weighed, the left side certainly was NOT 400 lbs heaver. I understand that GM did try and balance the coaches during the design and should be within 200 to 250 lbs side to side when the coach is loaded. I notice that you have a 23 foot coach, if so you most likely removed a 4k Onan… less weight than the “normal” 6k.

All that said: With the Onan gone you are now likely heaver on the RIGHT side, most likely about 200 lbs. Without the Onan you might be able to get your weight balance closer than GM did with the Onan.

Maybe you should weigh your coach to find out if you really have anything to worry about it? Rolling Eyes


Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo' http://m000035.blogspot.com

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Re: [GMCnet] Rear Weight Balance [message #181385 is a reply to message #181378] Thu, 23 August 2012 05:33 Go to previous messageGo to next message
Mr ERFisher is currently offline  Mr ERFisher   United States
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>
> Gene,
>
> Is that because of the auto-leveling?
>
the leveling valves just bring the coach back to ride height after leveling
for parking.

do the test
-set ride height with travel switch
- have 4 close friends stand on one side of rear bumper
-see if any adjustment is made by leveling valves...

they have so much hysteresis, and low sensitivity, they will not see
several hundred pounds of change.

>
> I understand they are not used with the 'wireless air' systems.
>

ride height is held by pressure change, and you set the ride height one
time with a preset button.

gene

--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
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Re: [GMCnet] Rear Weight Balance [message #181388 is a reply to message #181376] Thu, 23 August 2012 06:52 Go to previous messageGo to next message
C Boyd is currently offline  C Boyd   United States
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Rob: from the book `78 operator manual.
"The independent suspension on this vehicle could
be adversely affected by an unbalanced load on
either side of vehicle. The allowable front lateral
weight variation is 250 pounds. The allowable
rear lateral weight variation is 600 pounds."



Robert Mueller wrote on Thu, 23 August 2012 00:28

Peter,

IIRC according to one of the GMC manuals the left / right balance is not greater than 250 pounds.

I learned this from ChuckB; if I learned wrong I trust he will correct me.

Regards,
Rob M.

-----Original Message-----
From: Peter Garry

I have removed the 400lb Onan and do not intend to replace it. Now the water tank is on the other side and the generator space will
be for general storage with outside access. Should I move the water tank to the centre? or can the suspension system compensate?

Peter

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C. Boyd
76 Crestmont
East Tennessee

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Re: [GMCnet] Rear Weight Balance [message #181400 is a reply to message #181388] Thu, 23 August 2012 08:37 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
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Chuck,

THANKS!

I've filed this message where I can find it so I won't "bother" you again! ;-)

Regards,
Rob M.

-----Original Message-----
From: Charles Boyd

Rob: from the book `78 operator manual.
"The independent suspension on this vehicle could
be adversely affected by an unbalanced load on
either side of vehicle. The allowable front lateral
weight variation is 250 pounds. The allowable
rear lateral weight variation is 600 pounds."


C. Boyd

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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] Rear Weight Balance [message #181407 is a reply to message #181264] Thu, 23 August 2012 09:30 Go to previous message
jhbridges is currently offline  jhbridges   United States
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Well, I'm running sans (185 pound) genset this weekend, drove down here with a full water tank on the passenger side, coach did fine.  I ain't moving the tank.
 
--johnny
'76 transmode norris
'76 palm beach


________________________________
From: Peter Garry <petergarry@me.com>
To: gmclist@temp.gmcnet.org
Sent: Wednesday, August 22, 2012 10:19 AM
Subject: [GMCnet] Rear Weight Balance

I have removed the 400lb Onan and do not intend to replace it.  Now the water tank is on the other side and the generator space will be for general storage with outside access.  Should I move the water tank to the centre? or can the suspension system compensate?

Peter Garry
Calgary
1973 23' (once a painted desert)

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Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons. Braselton, Ga. I forgive them all, save those who hurt the dogs. They must answer to me in hell

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