Audi A4 2001 - Receiver or Accumulator and Restrictor, Replacing after Cleaning Refrigerant Circuit

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
– Replace dryer cartridge, receiver or accumulator and restric‐
tor.
– Examine expansion valve for dirt or corrosion; replace if nec‐
essary
– Assemble, evacuate and charge refrigerant circuit.
5.5 Receiver or Accumulator and Restrictor,
Replacing After Cleaning Refrigerant
Circuit
Note
Cleaning refrigerant circuit means flushing it with refrigerant
R134a, refer to
⇒ “1.4.13 Refrigerant Circuit Flushing With Refrigerant R134a“,
page 32 or blowing through with compressed air and nitrogen,
refer to
⇒ “1.4.12 Refrigerant Circuit Flushing With Compressed Air and
Nitrogen “, page 29 .
For example, on account of ingress of moisture (refrigerant circuit
open for lengthy period) or contamination
– Discharge refrigerant circuit
– Remove A/C compressor.
– Rectify cause of trouble.
– Clean refrigerant circuit (flush with refrigerant R134a, refer to
⇒ “1.4.13 Refrigerant Circuit Flushing With Refrigerant
R134a“, page 32 or blow through using compressed air and
nitrogen, refer to
⇒ “1.4.12 Refrigerant Circuit Flushing With Compressed Air
and Nitrogen “, page 29 ).
– Examine expansion valve for dirt or corrosion; replace if nec‐
essary
– Remove oil drain plug from A/C compressor.
Note
Different versions of the oil drain plug and its seal (it can be either
an O-ring or a gasket; always replace). Refer to
⇒ “5.1 Leaking or Damaged Components Except A/C Compres‐
sor, Accumulator or Receiver - Circuit Empty of Refrigerant“, page
191 and to the Electronic Parts Catalog (ETKA).
– To accelerate drainage of refrigerant oil, rotate compressor
e.g. by way of clutch plate of A/C clutch for example.
– Pour old refrigerant oil out of A/C compressor.
Note
Workshop-specific instructions, refer to Audi ServiceNet, HSO
Environment.
All A/C compressors
– Then add to the compressor the new refrigerant oil quantity
which matches the refrigerant oil quantity in the replacement
compressor (or the specified refrigerant oil quantity in vehicles
Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A2 2001 ➤ , A ...
Refrigerant R134a Servicing - Edition 01.2011
5. Removal and Installation 195