Audi Q5 2008 - Page 196

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– Remove the oil drain plug -B- / -D- from the A/C compressor
-A-.*
Note
♦ There are different versions of the oil drain plug -B- / -D- and
gasket -C- / -E- (depending on who is the A/C compressor
manufacturer).
♦ Pay close attention to the tightening specification for the oil
drain plug -B- / -D- (depending on the A/C compressor man‐
ufacturer and the oil drain plug version). Refer to ⇒ Heating,
Ventilation and Air Conditioning; Rep. Gr. 87 ; Specifications
(vehicle-specific repair manual).
♦ A/C compressors made by Denso and Nippondenso have an
oil drain plug -D- with a gasket already installed -E-; always
replace. Refer to Electronic Parts Catalog (ETKA).
♦ A/C compressors made by Sanden or Zexel have an oil drain
plug -D- with an O-ring already installed -E-; always replace.
Refer to Electronic Parts Catalog (ETKA).
♦ To accelerate drainage of refrigerant oil, rotate compressor,
for example, by way of clutch plate of A/C clutch for example.
♦ Drain the old refrigerant oil from the A/C compressor* (for dis‐
posing, refer to Audi-ServiceNet, HSO Environment).
Note
♦ Then fill A/C compressor with quantity of fresh refrigerant oil
corresponding to quantity of refrigerant oil in replacement A/C
compressor. Refer to
⇒ “3.4 Refrigerant Oil Capacities“, page 119 .*
♦ Use different refrigerant oils and quantities for the various
compressors. Refer to
⇒ “3.4 Refrigerant Oil Capacities“, page 119 .
♦ To ensure compressor lubrication on start-up, at least 80
cm
3
of refrigerant oil must be poured into the compressor, the
remainder can be added for example to the new reservoir or
receiver. Refer to
⇒ “3.4 Refrigerant Oil Capacities“, page 119 .
♦ If dirt has penetrated into the compressor with the refrigerant
circuit open (for example after an accident), compressor is to
be replaced.
♦ Clean refrigerant circuit (flush with refrigerant R134a, refer to
⇒ “1.4.13 Refrigerant Circuit Flushing With Refrigerant
R134a“, page 32 or blow through with compressed air and ni‐
trogen, refer to
⇒ “1.4.12 Refrigerant Circuit Flushing With Compressed Air
and Nitrogen “, page 29 )*
– Replace dryer cartridge, receiver* or accumulator* and re‐
strictor.
– Assemble, evacuate and recharge refrigerant circuit.
Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A2 2001 ➤ , A ...
Refrigerant R134a Servicing - Edition 01.2011
192 Rep. Gr.00 - General, Technical Data