Engine Size: 4.0
Refrigerant Type: R-134
Ambient Temp: 95
Pressure Low: 20
Pressure High: 250
Country of Origin: United States
Replaced the compressor and orifice tube today. It seemed like the o;d compressor was leaking oil and gas and was not building pressure like it should. The orifice tube was packed with metal shavings. I checked the line from the tube to the condenser and it was free of any debris. I pumped the system down and recharged it. While recharging the compressor kept cycling on and off. Once I had a full charge in, it still cycled on and off and never got cool. When I jumped the low pressure cut out switch and let it run, the low side down dropped to almost zero and a high side went up to a pressure of 350. Seems to me like the condenser may be plugged up with metal shavings. When I shut the truck off the high side stayed at over 250 and did not seem to equalize with the low side. What does this sound like to you? I am leaning towards a bad/plugged condenser I have not flushed the system yet. Any and all ideas welcome.
Did you replace the orifice tube? Sure it got put in the proper direction? Could also be plugged as you suspecting.
Since the tube had metal then the condenser must be totally packed.Replace it, the dryer and flush everything else.
TRB you know your stuff!!
I took it back apart on Sunday and found that I did insert the OT in wrong direction. I had already removed the condenser when I thought to pull the OT. So I did flush the condenser and a number of the lines. ( I got a Robinaire flush bottle a few years back to use on my Grand Caravan) Being that I installed the new OT backwards the force it pushed it another 3/4's of an inch further down the line and I didn't have a good pair of small needle nose pliers that would fit into the line. I ened up beating the crap out of the new OT to get it out. So I went and got a 2nd new OT thank goodness that they onl cost $2. Pumped it down recharged it and it seems to be working great I had 38 degree air out of the center vents on a 95 degree day. When I found the tube in backwards I thought to myself...what a moron I am...but I guess it's a lesson well learned.
Probably better that I flushed everything...
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