Dorn Hetzel
05-30-2009, 08:16
I am trying to diagnose a non-functional front AC (the engine driven one).
The system does not seem to have any significant leaks, as it will
hold a vacuum when pumped down.
A local shop helped me add the conversion connectors so we could
connect the system to their diagnostic equipment.
After holding a vacuum on the system for 30 minutes, we added some
refrigerant and started up.
There is a very small amount of cooling generated, but high-side
pressure builds very high, up to 500 lbs, which leads me to guess that
there is a blockage somewhere on the high side before the expansion
valve.
So, we pumped the refrigerant back out and I took the bird home and I
am setting up to pump air through the various lines to see if and
where the flow is restricted.
I am trying to remove the high side line at the compressor, and there
are some clamps on hose, which I have loosened and pulled back, but
the hose still won't come off the barb fitting.
I am wondering if I am going to have to sacrifice that last couple
inches of the hose and cut it off, or if there is a better way?
Here is a link to a picture of the compressor and hose and with
retracted clamps. Any suggestions?
http://www.hetzel.org/2009-05-30-01-bb-02.jpg
Regards,
Dorn Hetzel
77FC35
Hogansville, GA
The system does not seem to have any significant leaks, as it will
hold a vacuum when pumped down.
A local shop helped me add the conversion connectors so we could
connect the system to their diagnostic equipment.
After holding a vacuum on the system for 30 minutes, we added some
refrigerant and started up.
There is a very small amount of cooling generated, but high-side
pressure builds very high, up to 500 lbs, which leads me to guess that
there is a blockage somewhere on the high side before the expansion
valve.
So, we pumped the refrigerant back out and I took the bird home and I
am setting up to pump air through the various lines to see if and
where the flow is restricted.
I am trying to remove the high side line at the compressor, and there
are some clamps on hose, which I have loosened and pulled back, but
the hose still won't come off the barb fitting.
I am wondering if I am going to have to sacrifice that last couple
inches of the hose and cut it off, or if there is a better way?
Here is a link to a picture of the compressor and hose and with
retracted clamps. Any suggestions?
http://www.hetzel.org/2009-05-30-01-bb-02.jpg
Regards,
Dorn Hetzel
77FC35
Hogansville, GA