I made some progress today. Turns out that my compressor does not have
a Schrader valve in the low pressure fitting. It just has a manual
valve. Hopefully by this time tomorrow, I'll have some colder air
blowing in my Jeep!

Sam


redlinescooby@hotmail.com wrote:
> I have a 91 Cherokee that I'm trying to convert from R12 to R134a. I
> had an AC guy try to recover the R12, but he said it was 98% air. I'm
> using one of the InterDynamics kits and thought everything was going
> smoothly. Even though the instructions did not mention it, someone
> told me that I needed to remove the valve core from the low side port,
> since the conversion kit supplied adaptor fitting already has one. I
> have a valve core removal tool, but I can't seem to locate the valve
> core inside the fitting. After installing the adapter fittings, I
> tried to add some R134, but the meter is saying that it's overcharged.
> I don't believe that any R134 is even making it into the system.
> Another guy told me that I need to pull a vacuum on it. Has anyone
> else had this problem before?
>
> Thanks,
>
> Sam

 

I made some progress today. Turns out that my compressor does not have
a Schrader valve in the low pressure fitting. It just has a manual
valve. Hopefully by this time tomorrow, I'll have some colder air
blowing in my Jeep!

Sam


redlinescooby@hotmail.com wrote:
> I have a 91 Cherokee that I'm trying to convert from R12 to R134a. I
> had an AC guy try to recover the R12, but he said it was 98% air. I'm
> using one of the InterDynamics kits and thought everything was going
> smoothly. Even though the instructions did not mention it, someone
> told me that I needed to remove the valve core from the low side port,
> since the conversion kit supplied adaptor fitting already has one. I
> have a valve core removal tool, but I can't seem to locate the valve
> core inside the fitting. After installing the adapter fittings, I
> tried to add some R134, but the meter is saying that it's overcharged.
> I don't believe that any R134 is even making it into the system.
> Another guy told me that I need to pull a vacuum on it. Has anyone
> else had this problem before?
>
> Thanks,
>
> Sam

 

I just recharged my old grand wagoneer. There were no schrader valves. You
have to hook up the freon can, then
turn the valve on the compressor fitting (its at 90 degrees) to open the
port to the fitting. You only turn the valve so it is in the middlle of its
travel. There is also
a valve on the high side port on mine. If you turn the valves all the way
from where they were, you isolate the compressor. This is needed for
something sometimes according to the
manual. I had a leak at the sight glass on mine. Freon was coming out as
fast as I was putting it in. Tightening the
connections around the sight glass fixed that.

Fred

<redlinescooby@hotmail.com> wrote in message
news:1153346287.808011.285770@b28g2000cwb.googlegr oups.com...
>I made some progress today. Turns out that my compressor does not have
> a Schrader valve in the low pressure fitting. It just has a manual
> valve. Hopefully by this time tomorrow, I'll have some colder air
> blowing in my Jeep!
>
> Sam
>
>
> redlinescooby@hotmail.com wrote:
>> I have a 91 Cherokee that I'm trying to convert from R12 to R134a. I
>> had an AC guy try to recover the R12, but he said it was 98% air. I'm
>> using one of the InterDynamics kits and thought everything was going
>> smoothly. Even though the instructions did not mention it, someone
>> told me that I needed to remove the valve core from the low side port,
>> since the conversion kit supplied adaptor fitting already has one. I
>> have a valve core removal tool, but I can't seem to locate the valve
>> core inside the fitting. After installing the adapter fittings, I
>> tried to add some R134, but the meter is saying that it's overcharged.
>> I don't believe that any R134 is even making it into the system.
>> Another guy told me that I need to pull a vacuum on it. Has anyone
>> else had this problem before?
>>
>> Thanks,
>>
>> Sam
>

 

I just recharged my old grand wagoneer. There were no schrader valves. You
have to hook up the freon can, then
turn the valve on the compressor fitting (its at 90 degrees) to open the
port to the fitting. You only turn the valve so it is in the middlle of its
travel. There is also
a valve on the high side port on mine. If you turn the valves all the way
from where they were, you isolate the compressor. This is needed for
something sometimes according to the
manual. I had a leak at the sight glass on mine. Freon was coming out as
fast as I was putting it in. Tightening the
connections around the sight glass fixed that.

Fred

<redlinescooby@hotmail.com> wrote in message
news:1153346287.808011.285770@b28g2000cwb.googlegr oups.com...
>I made some progress today. Turns out that my compressor does not have
> a Schrader valve in the low pressure fitting. It just has a manual
> valve. Hopefully by this time tomorrow, I'll have some colder air
> blowing in my Jeep!
>
> Sam
>
>
> redlinescooby@hotmail.com wrote:
>> I have a 91 Cherokee that I'm trying to convert from R12 to R134a. I
>> had an AC guy try to recover the R12, but he said it was 98% air. I'm
>> using one of the InterDynamics kits and thought everything was going
>> smoothly. Even though the instructions did not mention it, someone
>> told me that I needed to remove the valve core from the low side port,
>> since the conversion kit supplied adaptor fitting already has one. I
>> have a valve core removal tool, but I can't seem to locate the valve
>> core inside the fitting. After installing the adapter fittings, I
>> tried to add some R134, but the meter is saying that it's overcharged.
>> I don't believe that any R134 is even making it into the system.
>> Another guy told me that I need to pull a vacuum on it. Has anyone
>> else had this problem before?
>>
>> Thanks,
>>
>> Sam
>

 

I just recharged my old grand wagoneer. There were no schrader valves. You
have to hook up the freon can, then
turn the valve on the compressor fitting (its at 90 degrees) to open the
port to the fitting. You only turn the valve so it is in the middlle of its
travel. There is also
a valve on the high side port on mine. If you turn the valves all the way
from where they were, you isolate the compressor. This is needed for
something sometimes according to the
manual. I had a leak at the sight glass on mine. Freon was coming out as
fast as I was putting it in. Tightening the
connections around the sight glass fixed that.

Fred

<redlinescooby@hotmail.com> wrote in message
news:1153346287.808011.285770@b28g2000cwb.googlegr oups.com...
>I made some progress today. Turns out that my compressor does not have
> a Schrader valve in the low pressure fitting. It just has a manual
> valve. Hopefully by this time tomorrow, I'll have some colder air
> blowing in my Jeep!
>
> Sam
>
>
> redlinescooby@hotmail.com wrote:
>> I have a 91 Cherokee that I'm trying to convert from R12 to R134a. I
>> had an AC guy try to recover the R12, but he said it was 98% air. I'm
>> using one of the InterDynamics kits and thought everything was going
>> smoothly. Even though the instructions did not mention it, someone
>> told me that I needed to remove the valve core from the low side port,
>> since the conversion kit supplied adaptor fitting already has one. I
>> have a valve core removal tool, but I can't seem to locate the valve
>> core inside the fitting. After installing the adapter fittings, I
>> tried to add some R134, but the meter is saying that it's overcharged.
>> I don't believe that any R134 is even making it into the system.
>> Another guy told me that I need to pull a vacuum on it. Has anyone
>> else had this problem before?
>>
>> Thanks,
>>
>> Sam
>

 

I just recharged my old grand wagoneer. There were no schrader valves. You
have to hook up the freon can, then
turn the valve on the compressor fitting (its at 90 degrees) to open the
port to the fitting. You only turn the valve so it is in the middlle of its
travel. There is also
a valve on the high side port on mine. If you turn the valves all the way
from where they were, you isolate the compressor. This is needed for
something sometimes according to the
manual. I had a leak at the sight glass on mine. Freon was coming out as
fast as I was putting it in. Tightening the
connections around the sight glass fixed that.

Fred

<redlinescooby@hotmail.com> wrote in message
news:1153346287.808011.285770@b28g2000cwb.googlegr oups.com...
>I made some progress today. Turns out that my compressor does not have
> a Schrader valve in the low pressure fitting. It just has a manual
> valve. Hopefully by this time tomorrow, I'll have some colder air
> blowing in my Jeep!
>
> Sam
>
>
> redlinescooby@hotmail.com wrote:
>> I have a 91 Cherokee that I'm trying to convert from R12 to R134a. I
>> had an AC guy try to recover the R12, but he said it was 98% air. I'm
>> using one of the InterDynamics kits and thought everything was going
>> smoothly. Even though the instructions did not mention it, someone
>> told me that I needed to remove the valve core from the low side port,
>> since the conversion kit supplied adaptor fitting already has one. I
>> have a valve core removal tool, but I can't seem to locate the valve
>> core inside the fitting. After installing the adapter fittings, I
>> tried to add some R134, but the meter is saying that it's overcharged.
>> I don't believe that any R134 is even making it into the system.
>> Another guy told me that I need to pull a vacuum on it. Has anyone
>> else had this problem before?
>>
>> Thanks,
>>
>> Sam
>

 

Sam.

There's valves on the compressor for the high and low sides. they're under
the thin metal caps. At least on a 89 XJ I converted. It worked for me and
was working over a year later when I sold it. The system was empty so I
pulled a vacume on it for several hours and filled it.

JoBo

 

Sam.

There's valves on the compressor for the high and low sides. they're under
the thin metal caps. At least on a 89 XJ I converted. It worked for me and
was working over a year later when I sold it. The system was empty so I
pulled a vacume on it for several hours and filled it.

JoBo

 

Sam.

There's valves on the compressor for the high and low sides. they're under
the thin metal caps. At least on a 89 XJ I converted. It worked for me and
was working over a year later when I sold it. The system was empty so I
pulled a vacume on it for several hours and filled it.

JoBo

 

Sam.

There's valves on the compressor for the high and low sides. they're under
the thin metal caps. At least on a 89 XJ I converted. It worked for me and
was working over a year later when I sold it. The system was empty so I
pulled a vacume on it for several hours and filled it.

JoBo