On May 7, 6:06 pm, "DougW" <post.repl...@invalid.address> wrote:
> breton wrote:
> > Hi All,
>
> > I bought a 93 cherokee sport a half year ago and the guy told me the
> > ac does not work. I checked the repair records and saw a r134a
> > conversion and charge by a professional in 2004. I tried charging it
> > myself today. I located the low pressure port (bottom one on the back
> > of the compressor with blue cap). First the system wouldn't except any
> > gas, it just made the dial on the can of coolant shoot up..
>
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^
Good call, this makes a lot of sense. I'll give it another look
tomorrow. I'm pretty sure what I was attaching it to was a new fitting
though (from the retrofit).

Best,
Breton

>
> STOP right there!
>
> You used the high side port. The connector off the compressor is
> the high-side no matter what the cap color is.
>
> The low side is between the condenser and the evaporator. The
> smallest line in the system that runs from the firewall.
>
> What bugs me is the connector should not have fit unless the
> shop that did the mod buggered something up.
>
> --
> DougW

 

breton wrote:
> "DougW" wrote:
>> breton wrote:
>>> Hi All,
>>
>>> I bought a 93 cherokee sport a half year ago and the guy told me the
>>> ac does not work. I checked the repair records and saw a r134a
>>> conversion and charge by a professional in 2004. I tried charging it
>>> myself today. I located the low pressure port (bottom one on the
>>> back of the compressor with blue cap). First the system wouldn't
>>> except any gas, it just made the dial on the can of coolant shoot
>>> up..
>>
>> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^
> Good call, this makes a lot of sense. I'll give it another look
> tomorrow. I'm pretty sure what I was attaching it to was a new fitting
> though (from the retrofit).

Hold on a sec, I boned my description.

..->Evaporator=>accumulator=>compressor-(highside port)->condenser->charge port.
|_________________________________________________ ____________________________|

- is skinny pipe, = is fat hose/pipe

They also come like this
http://www.familycar.com/ac1.htm

Since someone upgraded your system I'd take it to a qualified shop to
point out where the correct ports are. Like Spdloader pointed out, you
might have the correct port for the compressor that was installed.
But with a pegged gauge I'd be suspicious.

One thing for certain is you don't want to fill liquid in before
the pump or it will die a horrible death, same as an engine with
water in the pistons.

The other thing is to get the can to fill properly you need to have
the compressor running full tilt. That's done by turning on the AC
full, recirc, and if the pressure is so low it won't kick on then you
need to short the lowside cutoff switch located on the accumulator.
http://revbeergoggles.com/Fixes/sens...essure-low.jpg

FYI for the ZJ
http://revbeergoggles.com/Fixes/sens...ssure-high.jpg

And the fill port is by the overflow bottle.
http://revbeergoggles.com/temp/sensor-coolant.jpg

On my system you fill liquid in that port with the compressor running.

--
DougW

 

breton wrote:
> "DougW" wrote:
>> breton wrote:
>>> Hi All,
>>
>>> I bought a 93 cherokee sport a half year ago and the guy told me the
>>> ac does not work. I checked the repair records and saw a r134a
>>> conversion and charge by a professional in 2004. I tried charging it
>>> myself today. I located the low pressure port (bottom one on the
>>> back of the compressor with blue cap). First the system wouldn't
>>> except any gas, it just made the dial on the can of coolant shoot
>>> up..
>>
>> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^
> Good call, this makes a lot of sense. I'll give it another look
> tomorrow. I'm pretty sure what I was attaching it to was a new fitting
> though (from the retrofit).

Hold on a sec, I boned my description.

..->Evaporator=>accumulator=>compressor-(highside port)->condenser->charge port.
|_________________________________________________ ____________________________|

- is skinny pipe, = is fat hose/pipe

They also come like this
http://www.familycar.com/ac1.htm

Since someone upgraded your system I'd take it to a qualified shop to
point out where the correct ports are. Like Spdloader pointed out, you
might have the correct port for the compressor that was installed.
But with a pegged gauge I'd be suspicious.

One thing for certain is you don't want to fill liquid in before
the pump or it will die a horrible death, same as an engine with
water in the pistons.

The other thing is to get the can to fill properly you need to have
the compressor running full tilt. That's done by turning on the AC
full, recirc, and if the pressure is so low it won't kick on then you
need to short the lowside cutoff switch located on the accumulator.
http://revbeergoggles.com/Fixes/sens...essure-low.jpg

FYI for the ZJ
http://revbeergoggles.com/Fixes/sens...ssure-high.jpg

And the fill port is by the overflow bottle.
http://revbeergoggles.com/temp/sensor-coolant.jpg

On my system you fill liquid in that port with the compressor running.

--
DougW

 

breton wrote:
> "DougW" wrote:
>> breton wrote:
>>> Hi All,
>>
>>> I bought a 93 cherokee sport a half year ago and the guy told me the
>>> ac does not work. I checked the repair records and saw a r134a
>>> conversion and charge by a professional in 2004. I tried charging it
>>> myself today. I located the low pressure port (bottom one on the
>>> back of the compressor with blue cap). First the system wouldn't
>>> except any gas, it just made the dial on the can of coolant shoot
>>> up..
>>
>> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^
> Good call, this makes a lot of sense. I'll give it another look
> tomorrow. I'm pretty sure what I was attaching it to was a new fitting
> though (from the retrofit).

Hold on a sec, I boned my description.

..->Evaporator=>accumulator=>compressor-(highside port)->condenser->charge port.
|_________________________________________________ ____________________________|

- is skinny pipe, = is fat hose/pipe

They also come like this
http://www.familycar.com/ac1.htm

Since someone upgraded your system I'd take it to a qualified shop to
point out where the correct ports are. Like Spdloader pointed out, you
might have the correct port for the compressor that was installed.
But with a pegged gauge I'd be suspicious.

One thing for certain is you don't want to fill liquid in before
the pump or it will die a horrible death, same as an engine with
water in the pistons.

The other thing is to get the can to fill properly you need to have
the compressor running full tilt. That's done by turning on the AC
full, recirc, and if the pressure is so low it won't kick on then you
need to short the lowside cutoff switch located on the accumulator.
http://revbeergoggles.com/Fixes/sens...essure-low.jpg

FYI for the ZJ
http://revbeergoggles.com/Fixes/sens...ssure-high.jpg

And the fill port is by the overflow bottle.
http://revbeergoggles.com/temp/sensor-coolant.jpg

On my system you fill liquid in that port with the compressor running.

--
DougW

 

breton wrote:
> "DougW" wrote:
>> breton wrote:
>>> Hi All,
>>
>>> I bought a 93 cherokee sport a half year ago and the guy told me the
>>> ac does not work. I checked the repair records and saw a r134a
>>> conversion and charge by a professional in 2004. I tried charging it
>>> myself today. I located the low pressure port (bottom one on the
>>> back of the compressor with blue cap). First the system wouldn't
>>> except any gas, it just made the dial on the can of coolant shoot
>>> up..
>>
>> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ^^
> Good call, this makes a lot of sense. I'll give it another look
> tomorrow. I'm pretty sure what I was attaching it to was a new fitting
> though (from the retrofit).

Hold on a sec, I boned my description.

..->Evaporator=>accumulator=>compressor-(highside port)->condenser->charge port.
|_________________________________________________ ____________________________|

- is skinny pipe, = is fat hose/pipe

They also come like this
http://www.familycar.com/ac1.htm

Since someone upgraded your system I'd take it to a qualified shop to
point out where the correct ports are. Like Spdloader pointed out, you
might have the correct port for the compressor that was installed.
But with a pegged gauge I'd be suspicious.

One thing for certain is you don't want to fill liquid in before
the pump or it will die a horrible death, same as an engine with
water in the pistons.

The other thing is to get the can to fill properly you need to have
the compressor running full tilt. That's done by turning on the AC
full, recirc, and if the pressure is so low it won't kick on then you
need to short the lowside cutoff switch located on the accumulator.
http://revbeergoggles.com/Fixes/sens...essure-low.jpg

FYI for the ZJ
http://revbeergoggles.com/Fixes/sens...ssure-high.jpg

And the fill port is by the overflow bottle.
http://revbeergoggles.com/temp/sensor-coolant.jpg

On my system you fill liquid in that port with the compressor running.

--
DougW

 

Spdloader wrote:
>> You used the high side port. The connector off the compressor is
>> the high-side no matter what the cap color is.
>>
>> The low side is between the condenser and the evaporator. The
>> smallest line in the system that runs from the firewall.
>>
>
> If it's a Sanden compressor, it can have the low side port on the
> compressor, or even both low and high side ports on the compressor.
>
> Also, the smaller of the two lines, is always the high pressure side.
>
> The low pressure line is always the larger diameter line.

I boned that description in so many ways it's not even funny. :/

All the vehicles I've ever worked on you filled in the skinny side
and stayed away from the compressor port.

--
DougW

 

Spdloader wrote:
>> You used the high side port. The connector off the compressor is
>> the high-side no matter what the cap color is.
>>
>> The low side is between the condenser and the evaporator. The
>> smallest line in the system that runs from the firewall.
>>
>
> If it's a Sanden compressor, it can have the low side port on the
> compressor, or even both low and high side ports on the compressor.
>
> Also, the smaller of the two lines, is always the high pressure side.
>
> The low pressure line is always the larger diameter line.

I boned that description in so many ways it's not even funny. :/

All the vehicles I've ever worked on you filled in the skinny side
and stayed away from the compressor port.

--
DougW

 

Spdloader wrote:
>> You used the high side port. The connector off the compressor is
>> the high-side no matter what the cap color is.
>>
>> The low side is between the condenser and the evaporator. The
>> smallest line in the system that runs from the firewall.
>>
>
> If it's a Sanden compressor, it can have the low side port on the
> compressor, or even both low and high side ports on the compressor.
>
> Also, the smaller of the two lines, is always the high pressure side.
>
> The low pressure line is always the larger diameter line.

I boned that description in so many ways it's not even funny. :/

All the vehicles I've ever worked on you filled in the skinny side
and stayed away from the compressor port.

--
DougW

 

Spdloader wrote:
>> You used the high side port. The connector off the compressor is
>> the high-side no matter what the cap color is.
>>
>> The low side is between the condenser and the evaporator. The
>> smallest line in the system that runs from the firewall.
>>
>
> If it's a Sanden compressor, it can have the low side port on the
> compressor, or even both low and high side ports on the compressor.
>
> Also, the smaller of the two lines, is always the high pressure side.
>
> The low pressure line is always the larger diameter line.

I boned that description in so many ways it's not even funny. :/

All the vehicles I've ever worked on you filled in the skinny side
and stayed away from the compressor port.

--
DougW

 

And my instructor told me the can would explode, blowing out one of my
frozen eye *****, that would break into a zillion pieces as it hit the
floor.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/


"DougW" <post.replies@invalid.address> wrote in message
news:rpN%h.160774$nh4.18954@newsfe20.lga
>
> STOP right there!
>
> You used the high side port. The connector off the compressor is
> the high-side no matter what the cap color is.
>
> The low side is between the condenser and the evaporator. The
> smallest line in the system that runs from the firewall.
>
> What bugs me is the connector should not have fit unless the
> shop that did the mod buggered something up.
>
> --
> DougW
>
>



--
Posted via a free Usenet account from http://www.teranews.com