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evacuating AC lines at home

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Old 15 Jul 2013, 11:16 am
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Location: darien il
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Default evacuating AC lines at home

family friend told me we can charge my AC at his shop one day after work. problem is one-day is never to-day. it's 90 and humid, i don't want to wait anymore. i've charged my AC at home and at the shop before, but i never really paid attention, just clip, unclip, turn valves, push buttons, look at gauges, etc.

that brings me to this..

if i go buy this $16 vacuum pump at harbor freight, will it work to pull a vacuum on my AC system with the same hose i'm normally using to charge the AC with? is the line i would pull vacuum from the same line i fill?

i mean, i don't know if that's the high pressure or low pressure line. i don't know if it matters, i just know i fill the refrigerant can screws onto this hose and it only fits on one of the AC lines. i am capable of getting the correct 1.56lbs of refrigerant in there, just confused about how to properly and cost effectively evacuate the system before filling it again.

the system is completely empty right now from my winter radiator replacement.

link to harbor freight pump:Vacuum Pump - AC Vacuum Pump w/ R134A & R12 Connectors

this is the hose i use for filling and would like to use for vacuum as well.
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Old 16 Jul 2013, 10:19 am
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Location: darien il
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Default Re: evacuating AC lines at home

well, it worked great. ice cold air. aahhhhhh! happy day!

but then after breakfast, i heard a faint hissing...

apparently the way the two hoses are routed together eventually causes one to chafe through the other. this is the second time i've had a hose fail due to rubbing on something. im pretty pissed off that i have $30 worth of R134a leaking off into space right now.

i suggest you all peek at this line on your car and do whatever you can to stop this before it happens to you.

the sharp edge indicated by the red arrow caused my problem.
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Last edited by rob342; 16 Jul 2013 at 10:22 am.
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