Home » Public Forums » GMCnet » [GMCnet] Duracool Compatibility?
| [GMCnet] Duracool Compatibility? [message #369973] |
Sat, 18 June 2022 13:55  |
k2gkk
Messages: 4452
Registered: November 2009
Karma: -8
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Is something special needed to refill an R134 system with Duracool?
D C "Mac" Macdonald
Amateur Radio K2GKK
Since 30 November '53
USAF and FAA, Retired
Member GMCMI & Classics
Oklahoma City, OK
"The Money Pit"
TZE166V101966
'76 ex-Palm Beach
k2gkk + hotmail dot com
Cell: 405-642-7337
ith Duracool?
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| [GMCnet] Re: Duracool Compatibility? [message #369974 is a reply to message #369973] |
Sat, 18 June 2022 14:38  |
James Hupy
Messages: 6806
Registered: May 2010
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Yep. The compressor lube for 134a is different than the lube for R-12 and
Duracool. If it were me, I would drain the compressor, and replace the
drier/ dessicant, then I would flush and evacuate the system for overnight
or so to double check for leaks. If there are none found, then depending
upon which compressor you have, I would refill with the correct amount of
lube, and not quite 3 cans of DuraCool. Opinions vary about pressures
needed, but I go for about 45° of air temperature between ambient and
outlet vent temperature. You can achieve greater cooling, but at the risk
of ice formation in the system. Just what I do.
Jim Hupy
Salem, Oregon
On Sat, Jun 18, 2022, 11:56 AM K2GKK D C_Mac_ Macdonald
wrote:
> Is something special needed to refill an R134 system with Duracool?
>
> D C "Mac" Macdonald
> Amateur Radio K2GKK
> Since 30 November '53
> USAF and FAA, Retired
> Member GMCMI & Classics
> Oklahoma City, OK
> "The Money Pit"
> TZE166V101966
> '76 ex-Palm Beach
> k2gkk + hotmail dot com
>
> Cell: 405-642-7337
> ith Duracool?
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
>
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| Re: [GMCnet] Re: Duracool Compatibility? [message #369976 is a reply to message #369975] |
Sat, 18 June 2022 16:22 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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One of the nice things about duracool is it is compatible with either synthetic or mineral oil. In other words it isn’t necessary to convert a mineral oil system(r12)to synthetic oil or vice versa.Duracool doesn’t care which is in the system.
Roy Keen
Minden,NV
76 X Glenbrook
[Updated on: Sat, 18 June 2022 16:24] Report message to a moderator |
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| Re: [GMCnet] Duracool Compatibility? [message #369977 is a reply to message #369973] |
Sat, 18 June 2022 16:25 |
Tom Katzenberger
Messages: 399
Registered: June 2019
Location: Kingsville, MD
Karma: 4
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Guys,
If it is a completely new system running straight Duracool, is the oil necessary?
Thanks,
Tom K.
Tom & Oki Katzenberger,
Kingsville, Maryland,
1977 23' Birchaven, 455 C.I.D., Micro Level, Howell EBL-EFI Spark Control, Macerator, York Air Compressor, 6 Wheel Disc, Quadra Bag, Onan W/Bovee Ignition
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| [GMCnet] Re: Duracool Compatibility? [message #369980 is a reply to message #369975] |
Sat, 18 June 2022 19:20 |
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Here's a link to Emery's excellent presentation on the subject.
https://www.gmcmi.com/wp-content/uploads/2013/02/Duracool_Emery-Stora_10-09.pdf
bdub
On Sat, Jun 18, 2022, 3:33 PM Emery Stora via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Mac
> If you are converting an original R134a system then the oil will be
> compatible with Duracool but if it is an original R12 system that was
> converted to R134a you are depending on whether the R12 to R134a conversion
> was done properly. The oils used in those systems are NOT compatible so if
> the system was not flushed and cleaned properly you could have problems.
> Otherwise you can just bleed off the 134a and replace it with Duracool.
> You fill the Duracool so that you have a low side pressure at 1500 rpm of
> approximately 20 psi (this will vary depending on the ambient air
> temperature) This should take 3 six ounce cans or slightly less.
>
> Contact me for more information if you have any doubts of the condition of
> the system before R134a was installed.
>
> Emery Stora
> 77 Kingsley
> Frederick CO
>>> On Sat, Jun 18, 2022, 11:56 AM K2GKK D C_Mac_ Macdonald k2gkk@hotmail.com>
>>> wrote:
>>>
>>> Is something special needed to refill an R134 system with Duracool?
>>>
>>> D C "Mac" Macdonald
>>> Amateur Radio K2GKK
>>> Since 30 November '53
>>> USAF and FAA, Retired
>>> Member GMCMI & Classics
>>> Oklahoma City, OK
>>> "The Money Pit"
>>> TZE166V101966
>>> '76 ex-Palm Beach
>>> k2gkk + hotmail dot com
>>>
>>> Cell: 405-642-7337
>>> _________________________________________
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
>
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GMCnet mailing list
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bdub
bdub.net
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| Re: [GMCnet] Duracool Compatibility? [message #369981 is a reply to message #369973] |
Sat, 18 June 2022 20:46 |
Tom Katzenberger
Messages: 399
Registered: June 2019
Location: Kingsville, MD
Karma: 4
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Senior Member |
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Guys,
I have installed a new Sanden compressor, new hoses and new dryer. The condenser and evaporator are original. I installed the Duracool but did not flush the system. I have not added the compressor oil as of yet.
Should I stay with mineral oil, just add PAG 100 or clean the system and install new Duracool and PAG 100 oil.
Thanks for any opinions and input.
Tom K.
Tom & Oki Katzenberger,
Kingsville, Maryland,
1977 23' Birchaven, 455 C.I.D., Micro Level, Howell EBL-EFI Spark Control, Macerator, York Air Compressor, 6 Wheel Disc, Quadra Bag, Onan W/Bovee Ignition
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| Re: [GMCnet] Duracool Compatibility? [message #369983 is a reply to message #369973] |
Sun, 19 June 2022 00:23 |
boybach
Messages: 566
Registered: December 2020
Location: Vancouver Island
Karma: 4
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Is there a problem continuing to run R134a?
My coach was converted at some time before I owned it. Last week, I topped off the system with R134a using a set of manifold gauges to monitor the pressures. System took my last 2 cans, but I could use a little more to get the pressures up to where I'd like to see them. For now, I'm getting temps in the low 40's with the ambient temps around 70. Ordered a 12-pack of R134A as I need to do my boat hauling truck as well before the weather turns really hot (although this year it might not  )
Larry
Larry - Victoria BC -
1977 ex-Palm Beach "Ol' Leaky" 40,000 miles, PO said everything working but forgot the word NOT. Atwood helium fridge, water heater & furnace. SS exhaust system, Onan, Iota Converter, R134A, New fuel lines & heat exchange hoses
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| Re: [GMCnet] Duracool Compatibility? [message #369985 is a reply to message #369983] |
Sun, 19 June 2022 12:54 |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
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I don't believe there is any problem using 134a, it is just not as efficient. If it works for you, stick with it.
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
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| Re: [GMCnet] Re: Duracool Compatibility? [message #370009 is a reply to message #369974] |
Thu, 23 June 2022 18:06 |
KB
Messages: 1262
Registered: September 2009
Karma: 0
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So, how do you flush the system? I know about evacuating it with vacuum, but this sounds different.
Our system blows cold for about 5 minutes, then warm unless we turn it off for 10 minutes or so
and turn it back on. I've replaced everything but the condenser on it. Unfortunately, the new
aluminum compressor has gotten noisy, so back to the drawing board.
As far as I can tell, the charge is correct, though I'll check it again.
My guesses at this point are: water or contamination in the system (hence the interest in flushing),
bad condenser (how do they go bad??), or a bad (newish) compressor.
I dream of someday having a fully functional GMC!
thanks,
Karen
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| Re: [GMCnet] Re: Duracool Compatibility? [message #370010 is a reply to message #370009] |
Fri, 24 June 2022 08:59 |
lqqkatjon
Messages: 2324
Registered: October 2010
Location: St. Cloud, MN
Karma: 5
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Senior Member |
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air compressor basically. open it up and blast it out.
I also used a product for flushing, was a aerosol can and blew out some sort of solvent, but I found not much in the condenser to blow out. pretty much the solvent that came out of that aerosol shot out the other end. everything else was new, so I never tried to flush out the evaporator.
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/
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| Re: [GMCnet] Re: Duracool Compatibility? [message #370011 is a reply to message #370009] |
Fri, 24 June 2022 11:42 |
boybach
Messages: 566
Registered: December 2020
Location: Vancouver Island
Karma: 4
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Senior Member |
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KB wrote on Thu, 23 June 2022 16:06
My guesses at this point are: water or contamination in the system (hence the interest in flushing),
bad condenser (how do they go bad??), or a bad (newish) compressor.
I dream of someday having a fully functional GMC!
thanks,
Karen
Water will boil off if you vacuum down the system so if you give it a nice long vacuuming that's one thing that can be eliminated.
Larry
Larry - Victoria BC -
1977 ex-Palm Beach "Ol' Leaky" 40,000 miles, PO said everything working but forgot the word NOT. Atwood helium fridge, water heater & furnace. SS exhaust system, Onan, Iota Converter, R134A, New fuel lines & heat exchange hoses
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| Re: [GMCnet] Duracool Compatibility? [message #370012 is a reply to message #369973] |
Fri, 24 June 2022 14:06 |
Tom Katzenberger
Messages: 399
Registered: June 2019
Location: Kingsville, MD
Karma: 4
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Senior Member |
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Karen,
I will let you know how it goes with me. Tomorrow I am doing a complete flush. Using "TSI Supercool Air Conditioning Fast flush".
I am installing a new dryer even though the old dryer had 5 min on it. I introduced PAG oil into a system that previously had Mineral oil in the system. I never flushed the Evaporator nor the condenser. I had just installed new lines, new dryer and a new Sanden compressor.
It was my mistake. I've been draining the compressor for 2 days and have been rotating it clockwise and counter clockwise to drain any remaining contaminated oil.
From what I have learned you can not flush the compressor or the dryer, but all else is fair game.
Their are tons of "How To" videos on Youtube.
Good luck and take care,
Tom K.
Tom & Oki Katzenberger,
Kingsville, Maryland,
1977 23' Birchaven, 455 C.I.D., Micro Level, Howell EBL-EFI Spark Control, Macerator, York Air Compressor, 6 Wheel Disc, Quadra Bag, Onan W/Bovee Ignition
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