front air conditioner troubleshooting

[Curt Sprenger]

Cut the hose, remove the hose fitting, install a nipple and pipe coupler, install the hose fitting.

Curt Sprenger

1987 PT38 8V92 "MacAttack Racing"

Anaheim Hills, CA
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On Sat, May 30, 2009 at 1:16 PM, Dorn Hetzel <"dorn@hetzel.org"> wrote:

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