I did the exact same thing to my 90 xj. I had a shop put a vacuum on it and
they left they gauges on it for a few hours with no loss of vacuum. then i
got the conversion kit from wal mart and proceeded to convert it. then with
the engine running and the a/c turned on to max (leave doors open so a/c
won't shut off. mine took one can of oil and 5 cans of 134a. don't rely on
the sight glass. fill by pressure. that was a year and a half ago and it
still blows cold (just not as cold as r12)
"MWB" <mark.bickford@verizon.net> wrote in message
news:uQRTa.23487$0F4.15887@nwrdny02.gnilink.net...
> I have a 1992 Jeep Cherokee. My son bought a A/C conversion kit at
Wal-Mart.
> Has anyone converted from to R-12 to R-134a?
>
> Mark
>
>
>

 

more better to fill by weight - especially w/R134A

--
Carlo F. Serusa, Jr. RPh
carlo.jr@comcast.net
'98 Sahara TJ - '89 YJ - '79 Scout II
O|||||||O
'92 Explorer '65 Mustang


"mikltaz" <mikltaz@hotmail.com> wrote in message
news:FiadndZy0Mmg5L2iU-KYvw@comcast.com...
> I did the exact same thing to my 90 xj. I had a shop put a vacuum on it
and
> they left they gauges on it for a few hours with no loss of vacuum. then
i
> got the conversion kit from wal mart and proceeded to convert it. then
with
> the engine running and the a/c turned on to max (leave doors open so a/c
> won't shut off. mine took one can of oil and 5 cans of 134a. don't rely
on
> the sight glass. fill by pressure. that was a year and a half ago and it
> still blows cold (just not as cold as r12)
> "MWB" <mark.bickford@verizon.net> wrote in message
> news:uQRTa.23487$0F4.15887@nwrdny02.gnilink.net...
> > I have a 1992 Jeep Cherokee. My son bought a A/C conversion kit at
> Wal-Mart.
> > Has anyone converted from to R-12 to R-134a?
> >
> > Mark
> >
> >
> >
>
>

 

Agreed, but you can get close with number of cans. If he is using the same
size cans that I do, five cans is three pounds, twelve ounces.

Earle

"Carlo Jr." <carlo.jr@comcast.net> wrote in message
news:lcqUa.149602$H17.53299@sccrnsc02...
> more better to fill by weight - especially w/R134A
>
> --
> Carlo F. Serusa, Jr. RPh
> carlo.jr@comcast.net
> '98 Sahara TJ - '89 YJ - '79 Scout II
> O|||||||O
> '92 Explorer '65 Mustang
>
>
> "mikltaz" <mikltaz@hotmail.com> wrote in message
> news:FiadndZy0Mmg5L2iU-KYvw@comcast.com...
> > I did the exact same thing to my 90 xj. I had a shop put a vacuum on it
> and
> > they left they gauges on it for a few hours with no loss of vacuum.
then
> i
> > got the conversion kit from wal mart and proceeded to convert it. then
> with
> > the engine running and the a/c turned on to max (leave doors open so a/c
> > won't shut off. mine took one can of oil and 5 cans of 134a. don't
rely
> on
> > the sight glass. fill by pressure. that was a year and a half ago and
it
> > still blows cold (just not as cold as r12)
> > "MWB" <mark.bickford@verizon.net> wrote in message
> > news:uQRTa.23487$0F4.15887@nwrdny02.gnilink.net...
> > > I have a 1992 Jeep Cherokee. My son bought a A/C conversion kit at
> > Wal-Mart.
> > > Has anyone converted from to R-12 to R-134a?
> > >
> > > Mark
> > >
> > >
> > >
> >
> >
>
>

 

here's a link that you might find interesting. it's worth a look

http://www.f11view.net/misc/ac_retrofit_problem.html

"Carlo Jr." <carlo.jr@comcast.net> wrote in message
news:lcqUa.149602$H17.53299@sccrnsc02...
> more better to fill by weight - especially w/R134A
>
> --
> Carlo F. Serusa, Jr. RPh
> carlo.jr@comcast.net
> '98 Sahara TJ - '89 YJ - '79 Scout II
> O|||||||O
> '92 Explorer '65 Mustang
>
>
> "mikltaz" <mikltaz@hotmail.com> wrote in message
> news:FiadndZy0Mmg5L2iU-KYvw@comcast.com...
> > I did the exact same thing to my 90 xj. I had a shop put a vacuum on it
> and
> > they left they gauges on it for a few hours with no loss of vacuum.
then
> i
> > got the conversion kit from wal mart and proceeded to convert it. then
> with
> > the engine running and the a/c turned on to max (leave doors open so a/c
> > won't shut off. mine took one can of oil and 5 cans of 134a. don't
rely
> on
> > the sight glass. fill by pressure. that was a year and a half ago and
it
> > still blows cold (just not as cold as r12)
> > "MWB" <mark.bickford@verizon.net> wrote in message
> > news:uQRTa.23487$0F4.15887@nwrdny02.gnilink.net...
> > > I have a 1992 Jeep Cherokee. My son bought a A/C conversion kit at
> > Wal-Mart.
> > > Has anyone converted from to R-12 to R-134a?
> > >
> > > Mark
> > >
> > >
> > >
> >
> >
>
>