A/C Vacuum pump
Mike Fairleigh
replacing the compressor & receiver/dryer. I could handle the job, if I had
some way to pull the vacuum on the system. Is there some way for a DIY'er
to get ahold of one? Thanks.
--
Mike Fairleigh
...Always remembering our Veterans.
AJDalton7
line, [ larger line] . Old Crosley one I use is 35 years old and works
great.
Margit
--
Yes there is! Spend 3 to 7 grand on a A/C Recovery / Recharge machine ...
that system is R-12. Even with R-134 systems, the pros are still expected to
fork out 3+ grand on a R-134 unit. I guess you're licenced to buy R-12 since
all you need is the vacuum pump.
http://www.teddyedward.co.uk/richard.html
Wish us luck!
Sent via Deja.com http://www.deja.com/
Before you buy.
mail.post it
off my compressor. To opperate it in stages seems to work well for me,
untill maximum vacuum is acheived.
My nieghbor rented one when he did his. The motor one does a better
vacuum from what I understand. The jobs I did with the compresser unit
are still doing ok though.
On Mon, 29 May 2000 22:39:18 -0500, "Mike Fairleigh" <mi...@sky.net>
wrote:
>I'd like to do a bit of A/C work on my '88 Grand Voyager, including
>replacing the compressor & receiver/dryer. I could handle the job, if I had
>some way to pull the vacuum on the system. Is there some way for a DIY'er
>to get ahold of one? Thanks.
>
>--
>Mike Fairleigh
>...Always remembering our Veterans.
>
>
- Sculptor
R Smith
> that system is R-12. Even with R-134 systems, the pros are still expected
to
> fork out 3+ grand on a R-134 unit. I guess you're licenced to buy R-12
since
> all you need is the vacuum pump.
Boy was that a sarcastic response. Even if he is not qualified and the
system has leaked all its refirgerant, it is perfectly legal for a
unlicensed DIY'r to do his/her own repair and replacements. And since he
mentioned that he is replacing the receiver/drier I can understand why he
would want to put a vaccum on the system right away even if he planned to
take it to a shop to have the system charged with R-12. The same vaccum
could also assure him that there were no leaks present before he takes the
system in for an expensive R12 re-charge.
Mike, I hope you find a good pump. PS: If none of the other suggestions
are helpful I have seen good electric pumps that sell for about $240.00 all
over the web. My guess is you are taking the oppurtunity to do an R134a
retrofit since you are replacing the compressor and the R/D.
Rob Smith
Neon John
Mike Fairleigh wrote:
>
> I'd like to do a bit of A/C work on my '88 Grand Voyager, including
> replacing the compressor & receiver/dryer. I could handle the job, if I had
> some way to pull the vacuum on the system. Is there some way for a DIY'er
> to get ahold of one? Thanks.
If you have an air compressor, you can get a venturi vacuum "pump"
for about $60. They're noisy, don't pull a good enough vacuum for
drying but they will get the job done if all you need is to get the
air out of an otherwise clean system. I have one that I've owned
for a couple of decades. Believe I got it at NAPA. JC Whitney also
sells them.
If you don't have an air compressor, the compressor from an old
refrigerator will work fine. Since these compressors rely on the
refrigerant flow for cooling, you must be careful not to overheat it
in vacuum service.
These pumps are also good for recovering refrigerant. For the small
quantities involved in auto systems, simply hooking the discharge of
the compressor to a recovery jug does the trick. The walls of the
jug serve as the condenser. this has an added advantage of not
trapping any recovered liquid refrigerant in the recovery system.
Important, considering how expensive refrigerants are these days.
Silver solder shraeder valves on the inlet and outlet of the
compressor and then you can hook it up with refrigeration hoses.
For a cheap recovery tank, use a 20# propane tank. Either remove
the valve and fit a refrigerant valve with a shraeder (1/4" flare)
fitting or make a POL to 1/4" flare adapter. Propane's vapor
pressure curve is very close to R-22 so the tank can be used for
either 12 or 22 or 134a. Be sure to label them so as not to mix
refrigerants.
John
--
John De Armond
johngd...@bellsouth.net
http://personal.bellsouth.net/~johngd/
Neon John's Custom Neon
Cleveland, TN
"Bendin' Glass 'n Passin' Gas"
Margit
"R Smith" <robsmith@nospam_hawaii.rr.com> wrote:
> > Yes there is! Spend 3 to 7 grand on a A/C Recovery / Recharge
machine ...
> > that system is R-12. Even with R-134 systems, the pros are still
expected
> to
> > fork out 3+ grand on a R-134 unit. I guess you're licenced to buy R-
12
> since
> > all you need is the vacuum pump.
>
> Boy was that a sarcastic response. Even if he is not qualified and
> the system has leaked all its refirgerant, it is perfectly legal for a
> unlicensed DIY'r to do his/her own repair and replacements.
>
>
> And since he mentioned that he is replacing the receiver/drier I can
> understand why he would want to put a vaccum on the system right away
> even if he planned to take it to a shop to have the system charged
> with R-12. The same vaccum could also assure him that there were no
leaks present before he takes the system in for an expensive R12
> recharge.
>
>
I think you're doing too much thinking.
> Mike, I hope you find a good pump. PS: If none of the other
> suggestions are helpful I have seen good electric pumps that sell for
> about $240.00 all over the web. My guess is you are taking the
> oppurtunity to do an R134a retrofit since you are replacing the
> compressor and the R/D.
>
>
Mike, don't listen to him, you'll never be happy with the retrofit.
That Chry. system of yours will spring leaks in places where it didn't
even know it had places to leak. I'd take a quick glance at the "H"
block valve of yours to see if it's all gunked up ... and keep your
fingers crossed that the evaporator isn't leaking. The evap, hoses and
compressor are usually the first to go. If you do switch to R-134,
remember that the recharge is only 80 percent of the original R-12
capacity. Thanks.
> >
> > http://www.teddyedward.co.uk/richard.html
> >
> > Wish us luck!
> >
> >
> > Sent via Deja.com http://www.deja.com/
> > Before you buy.
>
>
--