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[GMCnet] Main tank is at the rear. RIGHT ? [message #217665]

Sat, 10 August 2013 13:25

BobDunahugh

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Registered: October 2010
Location: Cedar Rapids, IA

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Replacing lines to, and from tanks. Drain plugs came out easily.
GMCMI Member Bob Dunahugh
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Re: [GMCnet] Main tank is at the rear. RIGHT ? [message #217666 is a reply to message #217665]

Sat, 10 August 2013 13:29

emerystora

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Registered: January 2004

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Yes, the main tank is at the rear.
That is the tank that has the pickup for the Onan at the top with the tube raised off the bottom so your Onan will stop before you run out of fuel. Helps prevent getting stranded if your Aux tank is empty.

However, if you have a Royale or Birchhaven Coachman didn't use that tube but just teed into the fuel line.

Emery Stora

On Aug 10, 2013, at 12:25 PM, Bob Dunahugh wrote:

> Replacing lines to, and from tanks. Drain plugs came out easily.
> GMCMI Member Bob Dunahugh
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Re: [GMCnet] Main tank is at the rear. RIGHT ? [message #217691 is a reply to message #217666]

Sat, 10 August 2013 17:38

habbyguy

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Registered: May 2012
Location: Mesa, AZ

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emerystora wrote on Sat, 10 August 2013 11:29

However, if you have a Royale or Birchhaven Coachman didn't use that tube but just teed into the fuel line.

I can never be sure what's original on my '78 Royale and what's been replaced, but the main tank DOES have a separate feed for the generator (I presume it doesn't go to the bottom of the tank so it can't drain it dry). Maybe the PO decided to change the rear tank to get this feature (or got "the wrong one" during a replacement), but it sure looks like it was the original tank. YMMV

Mark Hickey Mesa, AZ 1978 Royale Center Kitchen

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Re: [GMCnet] Main tank is at the rear. RIGHT ? [message #217695 is a reply to message #217691]

Sat, 10 August 2013 18:30

emerystora

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Registered: January 2004

Karma: 13

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Mark

the GMC Transmodes that GM supplied to Coachmen did have the Onan tube built into the tank but were not supplied with an Onan. However the tanks were already mounted into the chassis so Coachman decided to save the labor of dropping the tank to connect the Onan. They took the easy out by just teeing into a fuel line.

Some Royale owners have dropped the tank and connected the Onan the way GM meant it to be.

Emery Stora
On Aug 10, 2013, at 4:38 PM, Mark wrote:

>
>
> emerystora wrote on Sat, 10 August 2013 11:29
>> However, if you have a Royale or Birchhaven Coachman didn't use that tube but just teed into the fuel line.
>
> I can never be sure what's original on my '78 Royale and what's been replaced, but the main tank DOES have a separate feed for the generator (I presume it doesn't go to the bottom of the tank so it can't drain it dry). Maybe the PO decided to change the rear tank to get this feature (or got "the wrong one" during a replacement), but it sure looks like it was the original tank. YMMV
> --
> Mark Hickey
> Mesa, AZ
> 1978 Royale Center Kitchen
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Re: [GMCnet] Main tank is at the rear. RIGHT ? [message #217696 is a reply to message #217665]

Sat, 10 August 2013 19:10

habbyguy

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Registered: May 2012
Location: Mesa, AZ

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Emery, thanks for that information. Now I have one more reason to be thankful to my beloved PO...

Mark Hickey Mesa, AZ 1978 Royale Center Kitchen

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