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First thing to do is vacuum the air out of the system.
Next, the compressor will require 8 to 9 oz. of oil. You can buy a can
with 8.5 oz of oil and 2 oz of R134A at most parts stores (Interdynamics is the manufacturer I used). My '97 Blazer has a label stating use 1lb-14 oz, of R134a. That would be equal to (3) 12 oz. cans. The compressor has to be running in order to load the R134A. While loading, turn your AC switch to max and the fan on high. I had to jumper a 12volt wire to get the compressor to run continuously in order to load the first can into the system.
Before loading the oil, if you don't have a vacuum, One trick I've used in place of the vacuum is to hook-up a can of R134A to the low port of the system and open the lines slightly at the compressor to remove the air in the system. Do not run the engine or compressor while doing this.Some people will disagree about this backyard trick, but it does work, and R134A doesn't destroy the ozone. It will cost you the price of a 12oz can of R134A.
Good luck
Last edited by mike2004tct; 07-02-2005 at 09:38 AM.
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