Ac

[raceking1324]

My 91 explore in needs a new AC hose I wanted to put it on myself but everybody’s tell me I have to pressurize system can I put it on myself without pressure it in the system and just put in a couple of cans of Freon help

Topic

[dave]

after performing the repair, you should put the entire system under vacuum to remove moisture. you should get this a/c vacuum pump from harbor freight:

http://www.harborfreight.com/25-cfm-vacuum-pump-98076.html

perform a ‘leak test’; the system should arrive at -30hg” within’ 30 minutes of vacuum pumping. then, it should not lose 3lbs of pressure in 30 minutes.

since you are going to add your own R134a as a DIY’er, (more than likely you do not have a manifold gauge set) you’ll end up doing a ‘low pressure’ charge:

• connect to the low pressure port. many times this is located directly on the accumulator
• start the engine
• turn on the A/C system to Max Cold
• ensure that you have compressor clutch operation (if no compressor clutch engagement, you will have to jump the A/C relay)
• add the proper amount of R134a to your system via the low pressure port.

[college man]

You should leak check the system after the work.
You would need to see if the system holds vacuum.

[Author]

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