Harbor Freight sells a venturi style Vacuum pump for just a few bucks (less
than 20 I think). It requires an air compressor but will pull about 26
inches of mercury. A good vacuum pump will pull 28. I got a Robinaire pump
from Ebay for about 120 bucks and love it. The HF thing will work though
and R134 is cheap if you have to have it redone.
KerryP
Patch panels fabricated
Pinkertonk@xxxxxxxxx
dte.net/57imperial
Imperials -- 50 Limo, 57 roadster, 61's, 62, 68 Convert, 73, a 66 300 and a
bunch of lesser marques
----- Original Message -----
From: <chrysler1978@xxxxxxxxxxx>
To: <mailing-list@xxxxxxxxxxxxxxxx>
Sent: Friday, April 25, 2003 11:02 PM
Subject: Re: IML: 68, R134 conversion
> How do you go about "vacuuming the system"? How do you pressurize it to
> test for leaks? How do you detect a small leak?
>
> ----- Original Message -----
> From: "Dick Benjamin" <dickb@xxxxxxxxx>
> To: <mailing-list@xxxxxxxxxxxxxxxx>
> Sent: Friday, April 25, 2003 10:17 PM
> Subject: Re: IML: 68, R134 conversion
>
>
> I converted my 55 Hudson about 3 years ago, and my 56 Packard about 2
years
> ago - both are still cooling well.
>
> My son converted his 94 Jeep about 3 years ago also, and it is still
working
> well.
>
> In all of these conversions, I first vacuumed the system and checked for
> leaks - and fixed the ones I found. I did not replace the original hoses
> (they were not leaking). I had a bad evaporator valve (leaker) in the
> Hudson, my son had dumped the R-12 by mistake as he was pulling his engine
> for a rebuild, and the Packard has apparently a very slow leak (like 3 or
4
> years to go down) which I have been unable to find. The 134 doesn't
seem
> to make it any worse. I drove the Packard today, and ran the AC, as it
was
> a very warm day, and it's still cooling fine.
>
> Dick Benjamin
>
>
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