2001 Chevy Silverado High head pressure

2001 CHEVROLET SILVERADO
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SAMAY
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Air Conditioning problem
2001 Chevy Silverado V8 Two Wheel Drive Automatic

High head pressure 425+, low side 45, with half charge, 14oz. Replaced orifice screen. Removed orifice, reconnected line and blew compressor air through lines at compressor. Blew fine through both sides. Installed reman. compressor and orifice screen, still have high head, why?
Feb 21, 2010 at 2:13 PM
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DOCFIXIT
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Hi
What was original complaint? what has been replaced? are your readings in kPA or psi? was oil added to system?
Let me know
Thanks for donate
Feb 22, 2010 at 2:38 PM
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SAMAY
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Original problem same as now. Replaced compressor and orifice screen. Used Pag 46 oil 8oz. Readings are psi. As stated in original email, removed orifice put line back together removed two line from compressor blew compressed air through both sides no noted restriction. Original charge was a few ounces short and system, oil clean. Other than adding a little freon through the years components were original and untouched.

Thanks,
Robert
Feb 22, 2010 at 5:42 PM
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DOCFIXIT
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Did you drain oil from compressor before install? was accumulator replaced? system flushed? 8oz. is total charge some oil will be in condensor and accumulator. If you answer no to any questions then may have too much oil in system. Did you bypass high pressure cutoff ?
Feb 23, 2010 at 9:26 AM