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- Path: sparky!uunet!munnari.oz.au!spool.mu.edu!sdd.hp.com!news.cs.indiana.edu!noose.ecn.purdue.edu!en.ecn.purdue.edu!ghg
- From: ghg@en.ecn.purdue.edu (George Goble)
- Subject: Re: Concern For Ozone Depletion Clear, Knowledge of CFCs Mostly
- Message-ID: <1992Dec29.202248.21173@en.ecn.purdue.edu>
- Organization: Purdue University Engineering Computer Network
- References: <1733@airgun.wg.waii.com> <1992Dec28.191859.15570@en.ecn.purdue.edu> <1736@airgun.wg.waii.com>
- Date: Tue, 29 Dec 92 20:22:48 GMT
- Lines: 67
-
- In article <1736@airgun.wg.waii.com> miller@hmsp04.wg3.waii.com (Griff Miller X7114) writes:
- >In article <1992Dec28.191859.15570@en.ecn.purdue.edu> ghg@en.ecn.purdue.edu (George Goble) writes:
- >
- >>Current "ozone safe" (but high
- >>global warming) R-134a A/C owners, are reportedly being charged
- >
- >Is R-134a what some of the new Ford Taurus's have in them?
- >--
- >Griff Miller > miller@monarch.wg3.waii.com < use this for email.
- >
-
- Yep, it is R-134a, or HFC-134a or tetrafluoroethane. Just the ones
- shipping to Texas I think (this was last summer). The Lafayette
- Indiana Ford dealer, wants $1000 for a 30lb cylinder of R-134a.
-
- They are still trying to get some -134a PAG "compressor oil" for me to
- play with... for the last 6 months.. They come up with part number
- "YN11" from the Tarus service manual, and order it, and a 15 lb
- cylinder of R-134a shows up instead, with a price tag of $500.00 on it.
- I refuse it (I wanted the PAG compressor oil, not the refrigerant), but
- I noticed that the cylinder was made by Worthington in April 1992. I
- remember something about Worthington ordering a massive recall of
- zillions of cylinders of certain date codes, because of a faulty
- blow-out disc. I write down the date codes, and check with Worthington,
- sure enough this cylinder of R-134a is "hot". Back to the Ford dealer,
- and informed them and Worthington of this, a phone call to their
- wharehouse, and somthing like ALL of Ford's R-134a had to get "recalled".
- Too Bad.... Now if they would just get me that damn compressor oil...
-
- What I know so far about the R-134a automotive oils is that they are PAG
- (polyalkaneglycol) based. They are EXTREMELY hydroscopic.(absorbs water).
- If a bottle is left open for 20 mins, it is ruined. PAG oil is destroyed
- by trace amounts of "chlorides", which includes Freon-12, and "sludges"
- created in Freon-12 based systems. "Flush", which is probably R-11
- or R-113 (used to clean up systems in repair), also attacks the PAG
- oil. 1% flush remaining in a R-134a system usually results in compressor
- failure in < 1 week due to oil breakdown. R-134a systems have no
- "approved" flush I know of.. (why doesn't somebody try Isopentane?)..
- PAG oils are "volatile", they leave no "tell-tale" oil slicks
- at Freon leak sites like the mineral oil does.
-
- Now, you have a R-134a system, and you have a line/hose break and
- dump the charge. Air gets in, 20 min later your PAG oil is water
- logged and ruined... now what.. The oil is volatile, so pulling
- a vacuum on it will probably just boil the oil instead of getting
- the water out, there is no "approved" flush (I bet isopentane would
- work), so you cannot flush out the old wet oil, so just put in some
- more oil, and maybe a new drier (will be overcome by wet oil), and
- charge 'er back up (for $300).. and go....
-
- Wonder how long that wet system will last..?? 2-3 months?
-
- Wonder how long ANY NEW (non retrofitted) R-134a A/C will last once
- the local mechanics try to service it? As John DeArmond would say,
- "Can't sticker shock happen twice [on the same car]"?
-
- I have heard several people in both the refrigerator and the Automotive
- A/C industry, talk about rumors of manufacturers reducing warranties
- on NEW R-134a equipment, they are scared of it.
-
- I have also heard reports from IVY Tech in INDY, that mechanics are
- getting skin burns after working on R-134a systems. The PAFT
- (Program for Alternate Fluorocarbon Toxicity testing) results were
- completed on R-134a in Sept.. 5% conc causes testicle tumors in rats.
- My bet is that the PAG oil is causing the skin problems.. kind of hard
- to get much action on skin from refrigerant, except frostbite.
- --ghg
-