A8 Quattro Sedan V8-4.2L (AUX) (2001)
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Hose/Line HVAC: Description and Operation
A/C Refrigerant System, Component Overview
Hoses and lines
The mixture of refrigerant oil (PAG oil) and refrigerant R-134a attacks some metals and alloys (for example, copper) and breaks down certain hose
material. Use only hoses and lines which are identified with the lettering "R-134a."
Hoses and lines are secured with threaded connections. Always properly torque hose and line connections.
