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Old 08-08-2009, 04:36 AM   #1
tecky11
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ac

ive got an ac compressor for my truck without a clutch, after i repalce the clutch, how do i draw a vaccuum to recahrge the system?
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Old 08-08-2009, 05:56 PM   #2
Longhorn Man
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Re: ac

you need A/C tools for this.
I'll move this so someone will see it. It was posted on the electrical board.
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Old 08-08-2009, 05:59 PM   #3
kgt
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Re: ac

you need a vac pump that can draw the system down to 29 inches to remove all traces of moisture.
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Old 08-08-2009, 06:03 PM   #4
tecky11
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Re: ac

Where do ii fet one if those
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Old 08-08-2009, 06:15 PM   #5
kgt
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Re: ac

a automotive repair shop, its a pricey elec vac pump, our a/c machine at the dealer was 10k....but it also recovers the system and recharges it. its not one of those tools a most guys have at there house it would seem...??...
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Old 08-09-2009, 03:01 AM   #6
leddzepp
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Re: ac

You can buy a 2-stage R-12 and R-134 vacuum pump from Harbor Freight for $150.
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1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck.


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Old 08-09-2009, 04:04 AM   #7
tecky11
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Re: ac

as far as i know this has no oil in it, will the oil type matter what referigrant i use?
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Old 08-09-2009, 12:56 PM   #8
leddzepp
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Re: ac

Yes, R-134 and R-12 use different types of oil. If you have never done this before, I would recommend you go to an A/C shop or do more research before you attempt to do this. I am guessing that you will be using R-134 since you can no longer buy R-12.
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1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed.

1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck.


RIP ElJay
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Old 08-09-2009, 08:23 PM   #9
clinebarger
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Re: ac

I dont know about california but in texas you can buy R12 with a refrigerant handling license (a multible choice test) R12 is a superior refrigerant. nothing works like it in a R12 system. You will need a/c gauges a vacuum pump. mineral oil for R12 synthetic pag oil for 134A. if using 134A in a r12 system put 10% less refrigerant.
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Old 08-09-2009, 10:01 PM   #10
100%Chevy
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Re: ac

Before you put that new pump on,you should flush the system to remove any debris and old dirty oil.
Could save you some money!
I can still buy R-12 here.I'm certified also.
Mike.

Last edited by 100%Chevy; 08-09-2009 at 10:03 PM.
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