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Pipes and hoses of refrigerant circuit > < Quick-release couplings on refrigerant line

A4 Mk1

O-rings
O-rings
   
These rings seal the joints between the individual components of the refrigerant circuit.
Only O-rings resistant to R134a refrigerant and the related refrigerant oils are to be used. This is guaranteed if genuine replacement parts are used.
O-rings:
–  Use only once.
–  Observe correct diameters -a- and -b-.
–  Moisten with refrigerant oil before fitting → Heating, air conditioning; Rep. gr.87 or → Air conditioning; Rep. gr.87 (vehicle-specific workshop manual) and → Electronic parts catalogue.
  Note
The colour coding of O-rings for R134a refrigerant circuits has been discontinued. Use is made of black and coloured O-rings → Electronic parts catalogue and → Heating, air conditioning; Rep. gr.87 or → Air conditioning; Rep. gr.87 (vehicle-specific workshop manual).
  A87-0021

Pipes and hoses of refrigerant circuit > < Quick-release couplings on refrigerant line