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| Re: Little Help Requested Re-Installing Onan In Compartment [message #220410 is a reply to message #219663] |
Thu, 29 August 2013 20:42   |
A Hamilto
Messages: 4508
Registered: April 2011
Karma: 39
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Sorry all. I was wrong. That photo doesn't have complete info. And it seems to be from a 26', because my compartment isn't that deep.
I need the measurement from the body to the sheet metal of the power drawer for a 4kw Onan in an early model 23' GMC. This picture is an example, but I need it from a better angle (I took this one when it was dark, holding the door open with my head, the tape in one hand, and the camera in the other).
Since I couldn't find an OEM frame bracket, Kerry Pinkerton was kind enough to fabricate one for me, but I need to drill the holes in the bracket where the power drawer bolts to it. So I need to put the power drawer in the correct position to mark the holes.
Too far back and there won't be room for insulation at the rear, too far forward and I won't be able to close the door when the Onan is in place. I don't want to get it all bolted in, the Onan slid in, and find I have to take the Onan back out to drill the holes a quarter of an inch one way or the other.
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| Re: Little Help Requested Re-Installing Onan In Compartment [message #220443 is a reply to message #220437] |
Thu, 29 August 2013 22:51 |
A Hamilto
Messages: 4508
Registered: April 2011
Karma: 39
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Senior Member |
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| Dennis S wrote on Thu, 29 August 2013 22:27 |
No, the photo I supplied is from a 1973, 23 ft, with 4ooow Onan, TZE 267, with gaucho style rear seating. When I bought mine there were only 20, 23 ft coaches in the registry with lower serial numbers,so it is an early version.
Perhaps the other photos in my album help..
Here is the faceplate from the body with the Onan "in"
and further down..
http://www.gmcmhphotos.com/photos/onan-4kw-compartment/p48879-0325.html
and the front edge of the Onan is nearly flush at the bottom...
http://www.gmcmhphotos.com/photos/onan-4kw-compartment/p48878-0306.html
Perhaps Matt has some photos or dimensions.
I can try to get to the coach and take more measurements as needed ---
Dennis
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Thanks for the fresh urls.
I will take a measurement of the LEFT side of mine and see if I can get 4" without the slides contacting the back wall of the compartment. I know I want it as far back as I can get it for airflow through the grill on the door. But I need some space in the back for insulation.
I am also afraid if I don't get this right, the muffler won't mount without modification.
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| Re: Little Help Requested Re-Installing Onan In Compartment [message #220465 is a reply to message #220443] |
Fri, 30 August 2013 06:04 |
Dennis S
Messages: 3046
Registered: November 2005
Karma: 2
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Senior Member |
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[quote title=A Hamilto wrote on Thu, 29 August 2013 22:51][quote title=
Thanks for the fresh urls.
I will take a measurement of the LEFT side of mine and see if I can get 4" without the slides contacting the back wall of the compartment. I know I want it as far back as I can get it for airflow through the grill on the door. But I need some space in the back for insulation.
I am also afraid if I don't get this right, the muffler won't mount without modification.[/quote]
I will try to get to the coach before noon today and take some additional measurements and photos --
Dennis
Dennis S
73 Painted Desert 230
Memphis TN Metro
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| Re: Little Help Requested Re-Installing Onan In Compartment [message #220531 is a reply to message #220529] |
Fri, 30 August 2013 13:09 |
Dennis S
Messages: 3046
Registered: November 2005
Karma: 2
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[quote title=A Hamilto wrote on Fri, 30 August 2013 12:48]
[/quote |
When I push the power drawer back until the slides hit the wood of the back wall, I still only have 4-1/4 inches from the power drawer top to the body opening, where you show 4-1/2", and presumbably yours is not touching the sheet metal which is 3/4" from the wood.
So my compartment is AT LEAST an inch shallower than yours, maybe more. And that means I need to move my back wall in order to get a heat shield, insulation, and 4-1/2" at the front for air flow.
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Unfortunately, if the PO rebuilt the compartment after removing the Onan -- he may have altered from the original dimensions. Do you have room to add a "bump-out" on the new interior wall? Sorta like a doghouse for a higher intake -- but turned on side. The generator end extends beyond the slide rails when the Onan is pushed in.
Dennis
Dennis S
73 Painted Desert 230
Memphis TN Metro
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| Re: Little Help Requested Re-Installing Onan In Compartment [message #220539 is a reply to message #220531] |
Fri, 30 August 2013 13:29 |
A Hamilto
Messages: 4508
Registered: April 2011
Karma: 39
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Senior Member |
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| Dennis S wrote on Fri, 30 August 2013 13:09 |
Unfortunately, if the PO rebuilt the compartment after removing the Onan -- he may have altered from the original dimensions. Do you have room to add a "bump-out" on the new interior wall? Sorta like a doghouse for a higher intake -- but turned on side. The generator end extends beyond the slide rails when the Onan is pushed in.
Dennis
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The plan right now is to do something like that in the short term to get the Onan installed at the correct orientation for airflow space at the front. But now I won't be able to use the Onan until I do something more permanent involving heat shielding and insulation.
I was planning to reconfigure the back from a full time bed to a rear dinette, so mucking with the rear wall of the Onan compartment is not much outside the scope of work. I just didn't want to have to do that until I was ready to work on the back.
I need to get the Onan in and working, the jack knife sofa installed (requires mod to both the step behind the driver's seat and the sofa, in progress), replace the converter, install a refrigerator and get the rear bumper extension removed before was going to even think about using the GMC. I had hoped to get that stuff done and spend a night ot two in it before I had to mess with the "bedroom".
This sets me back a day or so, translated to the rate that I work, a week to a month.
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