Refrigerant Circuit Component Allocation, Influence On High And Low Pressure Sides: O-Rings
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These rings seal off the connection points between individual components of the refrigerant circuit.
Only O-rings that are resistant to refrigerant R134a and the associated refrigerant oil may be used. Make sure they are original replacement parts.
O-Rings:
-- Always use only once.
-- Make sure diameters -a- and -b- are correct.
-- Coat with refrigerant oil before installing. Refer to Refrigerant Circuit (vehicle-specific Service Information) and the Parts Information.
NOTE:
The O-ring color coding for refrigerant circuits with R134a has been discontinued. Black and colored O-rings are used. Refer to Parts Information and Refrigerant Circuit (vehicle-specific Service Information).