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Author Topic: AC tools  (Read 27708 times)

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Offline daveismissing

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Re: AC tools
« Reply #45 on: July 07 2012, 10:25:12 AM »
recap: what I have is a Buick converted to 134a when the compressor was replaced.
Been a couple of years, wasn't cooling worth a d*mn.
I saw 20-24 lbs and cycling when set at max settings.
All I could get this trip was 134a with crap in it, not seen anything locally.
Don't want add too much of that.
Added some - stopped cycling and gives a bit of cool at ~30 lbs
Added some more - better may 65deg at vent with 35lbs

So I guess I'm not doing it the right way, just trying to get by while the truck is down.
Chart on the can says 40-55lbs at these temperatures?
does that sound reasonable?
 
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Offline SuperSix

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Re: AC tools
« Reply #46 on: July 07 2012, 10:37:00 AM »
Did you adjust the pressure witch for R134a?
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Offline ULYCYC

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Re: AC tools
« Reply #47 on: July 07 2012, 10:47:33 AM »
Quote from: SuperSix on July 07 2012, 10:37:00 AM
Did you adjust the pressure witch for R134a?

You mean the one on back of the broom? :icon_eyes:
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Offline ULYCYC

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Re: AC tools
« Reply #48 on: July 07 2012, 10:55:29 AM »
It's real hard to get it right the way your doing it.  The fastest and best results is to evac. the system, check/replace the orfice tube then vacuum down and hold 30in's for a few hours. If it holds the add 3 cans of pure 134A. Now your gauges will show how it working. Make sure your cycle switch is working also as said above.
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Offline Steve Wood

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Re: AC tools
« Reply #49 on: July 07 2012, 11:11:37 PM »
don't know what your temps are, but, 40 psi sounds reasonable
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Offline daveismissing

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Re: AC High side
« Reply #50 on: July 13 2012, 08:14:40 AM »
Here is the requested pic- my high side
measures 3/8 across the threads
What fits there?

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Offline SuperSix

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Re: AC tools
« Reply #51 on: July 13 2012, 08:51:16 AM »
THat looks like an R134 connector.
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Offline Steve Wood

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Re: AC tools
« Reply #52 on: July 13 2012, 09:24:14 AM »
134A connectors are quick disconnects
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Offline ULYCYC

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Re: AC tools
« Reply #53 on: July 13 2012, 10:11:48 AM »
This may help. You need to buy an adapter for your gauge set hose.


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Offline Charlief1

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Re: AC tools
« Reply #54 on: July 13 2012, 12:29:56 PM »
That was one of the stop gap things they did before converting to R-134. It's a high side quick connedt unit used for high speed filling at the factory. Nothing special really and you'll need to find a special adapter to change it over to R-134.
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Offline daveismissing

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Re: AC tools
« Reply #55 on: July 13 2012, 02:38:06 PM »
So I really need an old style R12 fitting that mates to the 1/4 hose flare fitting?
They seem scarce.
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Offline daveismissing

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Re: AC tools
« Reply #56 on: July 13 2012, 02:49:43 PM »
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Offline Charlief1

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Re: AC tools
« Reply #57 on: July 13 2012, 02:57:42 PM »
Quote from: daveismissing on July 13 2012, 02:49:43 PM
Is this is it?
http://www.tooltopia.com/robinair-10468a.aspx



That's the bastard adaptor for the R-12 guage set alright. You've got to remember that originally the high and low sides had the same fittings on them. They made the high side smaller so people wouldn't try to charge on the high side and blow the tank or can up. When they started looking at going with R-134 they came up with that bastard child to keep from blowing refridgerant when removing the charge hose off the high side. Didn't work worth a damn but they tried at least. :rolleyes;
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Offline Just a Six?

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Re: AC tools
« Reply #58 on: July 13 2012, 03:31:20 PM »
Mine look similar to the first few pics. But I could take a pic tomorrow if you want or just meet me somewhere & you can try them. Wally World USA with caps etc was under $20
 
http://autoacrepairs.com/134a%20CONVERSION%20FITTINGS.htm
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Offline Steve Wood

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Re: AC tools
« Reply #59 on: July 13 2012, 03:33:20 PM »
You are making this awfully difficult.

If you are going to empty the system and suck it down, then put the right fitting on it.

If not, put enuf freon in it to get to 40 psi and forget about it.
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