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Home » Public Forums » GMCnet » Finally Convinced me to switch to Duracool (A couple of quick questions. )
Finally Convinced me to switch to Duracool [message #281831] Fri, 10 July 2015 14:55 Go to next message
Dan is currently offline  Dan   United States
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Registered: August 2014
Location: Allentown, NJ
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Ok my coach has a functional dash AC unit that has been converted to 134a. I never doubted all the good things said about hydrocarbon refrigerants on this forum, but I was hesitant to fix something that was not broken. After reading some of the latest posts, the extreme difference in head pressure between 134 and duracool convinced me, along with the low price of some of the hydrocarbon based refrigerants on eBay

http://www.ebay.com/itm/3-Cans-Enviro-Safe-AC-Refrigerant-Replacement-Dye-R-134a-/311321170892?hash=item487c3013cc&vxp=mtr

http://autorefrigerants.com/hydrocarbon-refrigerants

So one question. How do I bleed off the old refrigerant? It is my understanding that I do not need to evacuate the system, or add any oil is this correct? Thanks for your help.



Dan DeLuca 1978 Eleganza II (http://imgur.com/gallery/YFHhK) Parked at Evil Monkey Farm in Allentown, New Jersey

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Re: Finally Convinced me to switch to Duracool [message #281838 is a reply to message #281831] Fri, 10 July 2015 16:41 Go to previous messageGo to next message
GeorgeRud is currently offline  GeorgeRud   United States
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Perhaps the most responsible thing would be to have the system evacuated at an AC shop or other qualified repair facility. They won't fill it for you with Duracool, but you can do that yourself with the cans and a tap that Duracool sells.

It does seem to do a great job in our marginal AC systems!

George Rudawsky
Chicago, IL
75 Palm Beach

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Re: Finally Convinced me to switch to Duracool [message #281840 is a reply to message #281838] Fri, 10 July 2015 16:54 Go to previous messageGo to next message
Dan is currently offline  Dan   United States
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Registered: August 2014
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Yes, it seems there is no real environmentally safe and legal way to drain the system DIY. The shops around here would just look at me like I had 4 heads if I showed up with such a request. If the system were to leak down I should be able to top off with ducal. Perhaps I will start with that.



Dan DeLuca 1978 Eleganza II (http://imgur.com/gallery/YFHhK) Parked at Evil Monkey Farm in Allentown, New Jersey

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Re: Finally Convinced me to switch to Duracool [message #281855 is a reply to message #281840] Sat, 11 July 2015 00:17 Go to previous message
Bullitthead is currently offline  Bullitthead   United States
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A cold, vacuumed, refrigerant tank with an early valve will pull the refrigerant out of the system. Vacuum the tank while it is hot in the sun, then stick it in a 5 gallon bucket, cover it with ice, and hook it up to the system. A little heat on the receiver drier, accumulator, and evaporator (heat the entire system with some engine heat) will drive over 90% into that cold tank.

Terry Kelpien ASE Master Technician 73 Glacier 260 Smithfield, Va.

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