Home » Public Forums » GMCnet » A6 ac compressor replacement
| Re: [GMCnet] A6 ac compressor replacement [message #346748 is a reply to message #346744] |
Thu, 22 August 2019 21:44   |
Jim Miller
Messages: 501
Registered: March 2008
Karma: 10
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In one of Onan’s manuals it cautions about using a tee between fuel tanks/ coach engine/ Onan fuel pump inlet and it alludes to a fuel starvation issue as the reason. GMC-upfitted coaches had a separate pickup in the main tank for the Onan per Onan’s commendation but other coaches (like my Coachmen Royale) have the tee. My Royale has been derelict since I bought it so I cannot speak from experience but I tend to put a lot of stock in what the old timers say and if they say a tee’d pickup is a problem then I will defer to their experience and try to avoid such.
Fundamentally there is no reason the Onan cannot run indefinitely while in its enclosure as long as it has 12VDC and uninterrupted fuel.
It is a trivial task to determine if an Onan quit due to a fuel delivery problem: Loosen the carb bowl bolt and see if gas comes out. If it does not then there is a fuel delivery issue. If tuel comes out then the problem lies elsewhere and proceed down that side of the troubleshooting flowchart.
—Jim
> On Aug 22, 2019, at 9:21 PM, John R. Lebetski via Gmclist wrote:
>
> Onans that run fine at home then die on the road is usually a kinked fuel hose between the nipple on the drawer floor and the fuel pump. There was a
> factory spring to dress the hose but those have rusted away years ago Drawer closed, line kinks and reduces fuel flow just enough to eventually not
> keep up.
> --
> John Lebetski
> Woodstock, IL
> 77 Eleganza II
>
>
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Jim Miller
1977 Eleganza
1977 Royale
Hamilton, OH
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Jim Miller
1977 Eleganza II
1977 Royale
Hamilton, OH
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| Re: A6 ac compressor replacement [message #346752 is a reply to message #319518] |
Fri, 23 August 2019 08:02 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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The tee is a typical 'cheap out' by an upfitter. They didn't want to drop the tanks - or at least the rear - to gain access to the genset fuel connection. If you have an upfitted Transmode, and if there is a tee feeding the Onan, when you drop the tanks for maintenance, replumb the Onan to the tank fitting.
--johnny
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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| Re: A6 ac compressor replacement [message #346779 is a reply to message #319518] |
Fri, 23 August 2019 14:48 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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Matt, the time you spent dicking with the genset to find the pinched line save me the time I would have spent dicking with mine. I think I can repurpose a piece of screen door spring - if it isn't too strong - to keep the fuel line up when the genset is pushed into the space.
--johnny
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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| Re: [GMCnet] A6 ac compressor replacement [message #346783 is a reply to message #346781] |
Fri, 23 August 2019 18:22 |
dsmithy
Messages: 210
Registered: July 2012
Location: Lincoln Nebraska
Karma: 0
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Senior Member |
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Gentlemen,
One’s intuition would suggest that a big, clunky machine would have big, clunky solutions to problems. That was certainly my initial take on our beloved machine. I learned through hard experience to pay closer attention. This string of posts proves the actual fact that subtlety is more often the route to a solution. As someone who redid all his fuel lines in 2000 and is facing a repeat, this string is a revelation. I never even touched the Onan fuel lines in 2000. My bad. Now I know what to avoid. Let us hope the newbies take the larger lesson and search the forum to read the full discussions and avoid the dead-ends that result in intermittent problems. I REALLY appreciate the back and forth of what people tried and what didn’t completely solve the problem. (Thank you Matt.) Just a comment from a habitual lurker. Thanks again for sharing.
Douglas & Virginia Smith
dsmithy18 at gmail
Lincoln Nebraska
’73 “Canyonlands” since ‘95: “Wanabizo”, Anishinabe Indian for “He gets lost driving” Yes, really.
Quadrabag/6 wheel disks/3;70 final/Paterson QuadraJet/Thorley’s/Sundry other
P&W PT6, no wait, that's the wish list...
> On Aug 23, 2019, at 3:01 PM, James Hupy via Gmclist wrote:
>
> At your Home Depot or Lowe's in the plumbing tools department you will find
> some coiled sleeves in various sizes. One has a large enough I.D. for the
> fuel hose to fit inside. They are for bending copper tubing in various
> sizes.
> Jim Hupy
> Salem, Or.
>
> On Fri, Aug 23, 2019, 12:48 PM Johnny Bridges via Gmclist gmclist@list.gmcnet.org> wrote:
>
>> Matt, the time you spent dicking with the genset to find the pinched line
>> save me the time I would have spent dicking with mine. I think I can
>> repurpose a piece of screen door spring - if it isn't too strong - to keep
>> the fuel line up when the genset is pushed into the space.
>>
>> --johnny
>> --
>> 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
>>
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
> _______________________________________________
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Douglas & Virginia Smith,
dsmithy18 at gmail,
Lincoln Nebraska,
’73 “Sequoia” since ‘95: "Wanabizo";
Quadrabag/6 wheel disks/3:70 final/Paterson QuadraJet/Thorley’s/Alloy wheels/Sundry other
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| Re: [GMCnet] A6 ac compressor replacement [message #346784 is a reply to message #346783] |
Fri, 23 August 2019 18:44 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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It was about 8 years ago that the hose manufacturers figured out an
inexpensive way to overcome the Ethanol attack on rubber. The trick was to
install a Barrier, nothing more than a thin nylon type hose covered with
rubber.
So, we have coaches that come in and the customer tells us the hoses been
changed, but in the last 7-8 years.
If one does ot know, then they should replace it now along with Fuel pump,
Tank selector valve,Vapor separator and all the vent lines.
On Fri, Aug 23, 2019 at 4:23 PM Douglas Smith via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Gentlemen,
> One’s intuition would suggest that a big, clunky machine would have big,
> clunky solutions to problems. That was certainly my initial take on our
> beloved machine. I learned through hard experience to pay closer attention.
> This string of posts proves the actual fact that subtlety is more often the
> route to a solution. As someone who redid all his fuel lines in 2000 and is
> facing a repeat, this string is a revelation. I never even touched the Onan
> fuel lines in 2000. My bad. Now I know what to avoid. Let us hope the
> newbies take the larger lesson and search the forum to read the full
> discussions and avoid the dead-ends that result in intermittent problems. I
> REALLY appreciate the back and forth of what people tried and what didn’t
> completely solve the problem. (Thank you Matt.) Just a comment from a
> habitual lurker. Thanks again for sharing.
>
> Douglas & Virginia Smith
> dsmithy18 at gmail
> Lincoln Nebraska
> ’73 “Canyonlands” since ‘95: “Wanabizo”, Anishinabe Indian for “He gets
> lost driving” Yes, really.
> Quadrabag/6 wheel disks/3;70 final/Paterson QuadraJet/Thorley’s/Sundry
> other
> P&W PT6, no wait, that's the wish list...
>
>> On Aug 23, 2019, at 3:01 PM, James Hupy via Gmclist gmclist@list.gmcnet.org> wrote:
>>
>> At your Home Depot or Lowe's in the plumbing tools department you will
> find
>> some coiled sleeves in various sizes. One has a large enough I.D. for the
>> fuel hose to fit inside. They are for bending copper tubing in various
>> sizes.
>> Jim Hupy
>> Salem, Or.
>>
>> On Fri, Aug 23, 2019, 12:48 PM Johnny Bridges via Gmclist > gmclist@list.gmcnet.org> wrote:
>>
>>> Matt, the time you spent dicking with the genset to find the pinched
> line
>>> save me the time I would have spent dicking with mine. I think I can
>>> repurpose a piece of screen door spring - if it isn't too strong - to
> keep
>>> the fuel line up when the genset is pushed into the space.
>>>
>>> --johnny
>>> --
>>> 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
>>>
>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: A6 ac compressor replacement [message #346797 is a reply to message #319518] |
Sat, 24 August 2019 15:49 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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When next I replace mine, I'm going to 'load' it with a twist in one direction or the other, so that it will form a loop - IF ic can figure a loop that will fit available space.
--johnny
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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