Help identifying A/C hi pressure and Low pressure fittings for vacuuming system - Ford Powerstroke Diesel Forum
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Old 06-23-2011, 04:27 AM
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Help identifying A/C hi pressure and Low pressure fittings for vacuuming system

This is the first time to do any a/c wok so bear with me. I had to replace the A/c hose. So im going to vacuum the system. There is 2 nipples on the same line and then another on the canister. Why is there 3? and which one is low and which is high?
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Old 06-23-2011, 05:08 AM
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LP side should be the larger tube, and HP the smaller. It doesn't matter which access port you use

If I had my truck here, I'd make sure I was right, but that's traditionally correct, as far as the LP and HP lines are concerned
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Old 06-23-2011, 06:07 AM
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So from looking at mine there is not a LP acces port on the actual hose/line its in the cannister? Or do I have it backwards?
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Old 06-23-2011, 06:21 AM
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Yes, the LP (suction side) you will use the port on the canister, and the HP line is the line leaving the compressor and going to the condenser
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Old 06-23-2011, 06:40 AM
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thank you for your help
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Old 06-23-2011, 06:49 AM
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Anytime
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