R12/R134 conversion

Anybody got any reliable writeups on how to do the conversion,or at least where I can find a writeup??

I found this kit, don't know what year you have,
http://webepc.com/cgi-bin/sewse?/u/www/webepc.com/cmm/scripts/epc12.cmm+discap2

Thanks but not what I'm looking for..Thouhgt maybe someone had a step by step on converting from R12 to the 134 freon...There are kits out there but they aren't that clear..I know I'll have to buy a part but not sure which one

I use Red Tek 12A myself, does not need any kind of retrofit at all. It is not compatible with r12 or 134a gas, but it is compatible with both of the systems, just let the gas out and fill it up with red tek. Sealer and oil also available, or get the whole kit.

Where can 12a be purchased? I am looking to recharge my r12 system and do not want to deal with the cost of conversion.

Some of the Dual Replacement gasses are propane based. They work very well and actually cool better than the freon based gasses.

No safety concerns either.

I think that is what that Red Tek 12a gas is that 89ltd was refering to.

JD

It is my understanding that R12 is no longer available and has been taken off the shelves....
Red Tek 12 A is this normally sold at parts stores....or is it one of those
items that only Tibetan monks only allow off their compound every third blue moon..... :smile:

you would have to call around, I am in Windsor Ontario, Canada so things are different here, we can't even buy 134 without a license. Red Tek 12a is suppose to run cooler than R12.

I bought two can from Fox Tool Supply. I hope this works.

http://www.foxtoolsupply.com/

I recently purchased a conversion kit from Walmart (in California and should be offered in most states).

It offers three cans of 134a, adaptors, gauge w/hoses, instructions and a DVD/CD with step by step instructions.

The conversion was simple.

Go to (most any) service shops and ask them to evacuate your R-12 freon (most will do this for free, as R-12 is almost gold to them). Then attach the adaptors and charge your system to the required amount of 134a.

I have a very cold Jeep now.

Keep Jeepin and chillin

Hey I think I know what your talkin bout,saw one at the local Wally World...Just gotta glimpse,had my 5 yo grandson with me and toys on his mind..gonna sneak down there later n see if it's the one :thumbsup:

Do I have to purge/evacuate the old R12 before adding the 12a?

You can buy retro fit kits at any auto parts stores.
You should replace the accumulator before you do the conversion and yes you need to get rid of the r-12 in the system.
I have done quite a few conversions and it's very easy.
BTW you are converting to R-134a

I'm converting to HC12a. I had the R12 reclaimed and now I need to know how to charge it with the HC12a.

89ltd - How have you been charging yours? I purchased a kit with two cans of HC12a and a filler hose. I'm assuming the hose attaches to the low side. Its the only fitting that it will connect to. My question is how do you open the valve? When I connected to hose to the fitting nothing happened and I probably wasted a can. I need your help! Thanks.

the kit I have, uses a hose with a tap valve on the top,, after screwing on the can of freon, I turned the tap on the top and this pushes down and will pierce the can, then when you , hook it up to the low side and open up the valve on top of the can. Just make sure when you screw the can on, the sharp end that pierces the can is all the way up, other wise you will loose everything. The engine should be running with the a/c on max position while it is taking on the gas, any more questions let me know. With my Red Tek 12, the can should be upside down, with the hose on the botton while you are charging your system.

Thanks for the info. What are the square pegs loacted by the inlet valves for?

i have no idea, never touched them

Thanks for the Info. What are the post/square pegs along side the inlet valves used for?

So what you're saying is...when I hook up to the low side the hose and new can will prevent any gasses from escaping?

the valve opens in the same way as when you put air in your tires. You would have to describe your kit, did it come with a fitting to screw on to your low pressure hose? and then a quick disconnect?

No quick disconnect. THe hose screwed on the fitting. I connected the hose to the can then to the fitting. Punctured the can and turned the A/C on. Nothing happened. No flow. Maybe I'm missing a part of the kit. What you're saying sounds right. I'll look for the fitting and quick disconnect. Thanks.

when you screw in the tap that punctures the can it also seals the can closed, so then you have to unscrew the tap and the gas will be drawn in slowely, putting two cans in should take about an hour or so.

if after the can still has gas in it, you have to keep the hose kit on the can and close the top valve before disconnecting it from the low pressure side fitting.

I bought a 134 retrofit kit yesterday to see if that would fix my problem. Followed all the instructions and the system will not take any freon. I did notice that the aux fan didn't turn on and I never heard the compressor engage. Is there a low pressure switch the shuts down the compressor? Is there a way to override it? How do I recharge my system!!!!!! :mad:

there is a way to get it running, if you give me a minute...

you need to jump the wires on the low pressure cylcing plug, do you know where it is?

what size engine , year?

'92 4L

I jumped the switch (by the sight glass) and the compresser came on. It still wont take any freon!!!!! I dont know whats going on!!!!!

did you open the valve on the can after hooking it up???

I opened the can. I have a meter on the hose and it shows over 100lbs.

you have to open the freon line valve. (the square peg). there is one for high side and one for low side. hook up the hose and start the engine. open the line valve then open freon. after it start filling the compressor will kick on. make sure air is on max. i retrofitted my jeep last year and it still working good. i recommend you get a kit with the sealer in it as r-12 system is quite old and will save you trouble down the road

Thanks. I'll try it today. I thought the pegs had something to do with it.

That was it. Thanks. BTW the peg has to be turned in to open the valve.