skirkland1980

iTrader: (2)

This is the time of year when people have tons of questions about air conditioning and conversions so I put this article together. I've been certified in refrigerant handling since 1998 and been working for a dealership doing these repairs.
If your system has leaked out or you took it to a shop to be evacuated you can do these simple repairs yourself and save some $$. These are just some recommendations. If you want your air conditioning to work well for a long time here is the best way to convert the system to R134a.
If the compressor seems to be ok but is very old this would be a good time to replace it. I recommend a new genuine replacement from delphi or harrison, whomever the original manufacturer was. use the correct oil for the compressor. Its usually pag. Know for sure if the new compressor already has oil. If unsure drain it into a measuring cup and refill with the same amount. This is also a good time to replace the flexible hoses. Inspect the condenser and hard lines for chaffing. If there are oily/greasy areas on these parts that typically indicates a leak. I also like to replace all the o rings during a conversion. To remove all the old oil and sludge flush the condenser and evaporator with an ac compatible flush. If you dont have a flush gun you can pour a little in and blow it through with a blow nozzle. Using nitrogen for this is recommended but I always use a dry compressed air source. As long as you vacuum thoroughly you shouldn't have any moisture/contamination problems.
Always replace the accumulator and orifice tube. Once you ensure that everything is connected, tight, retrofit fittings on, and the system closed you can connect your manifold gauges and start to vacuum. The low side should read 28-29" for 30 minutes. If max vacuum isn't reached first make sure your gauges are calibrated, then you may suspect that you have a leak. Charge the system with a little nitrogen to find the leak. after you've corrected the problem you may now charge.
Connect a can to your can tap. Before you open the valve to charge make sure you are still holding a vacuum. Open the low side valve, about 1/2 the can will go in. Then start the engine and turn the ac on. The clutch will cycle on/off frequently until a full charge obtained. A typical car/truck with one evaporator holds about 2 12oz cans. You may also add a 2oz oil charge. This article is just to show what is involved in the conversion process, not to be a complete guide for repair. A refrigerant handling license is required by law.

AlkyIROC

That's really hard to read.

It's all well to tell someone how to do a conversion but very few people have the equipment to do proper AC repairs let alone a proper conversion. If you have no knowledge and don't have the proper machines or tools to do AC repairs, the best suggestion to anyone who needs their AC fixed is to take it into a shop and have it done properly.

skirkland1980

iTrader: (2)

I tried to fix it a little. Yeah i know but the same questions get asked about this over and over. People don't know how complicated the process is so they try to DIY and usually causes more problems. Like mixing refrigerants and oils and not replacing certain parts.