By using a new compressor designed for R134, I'm told new fittings must be used...where in the system do they go?...and...if the compressor, drier/evaporator, several hoses and seals are new (meaning never installed) is this still considered a retro-fit?...if so, where do the new fittings go on a compressor designed for r134...The Parts Bin,(an on-line parts supplier) said it should go to an A/C shop and have them installed in the lines...whats going on and..where in a 740 does the expansion valve go?
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