Audi A4 2001 - Page 37

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Tools Required
♦ A/C service station with flushing device (on these A/C service
stations, the auxiliary function “flush refrigerant circuit“ and the
refrigerant circuit flushing device required for it are present on
these A/C service stations. Refer to the Special Tools and
Equipment Catalog.
♦ VW/Audi passenger vehicle set adapter chest -VAS 6338/1- .
Refer to
⇒ “2.1.2 Adapter for Assembling Flushing Circuit“, page 42
and Special Tools and Equipment Catalog.
♦
Note
♦ If a A/C service station with flushing device is not available, it
is possible to flush the refrigerant circuit with the flushing de‐
vice available using Refrigerant circuit flushing device , refer
to Special Tools and Equipment Catalog, however the flushing
must be done manually. Refer to ⇒ page 37 .
♦ On vehicles with screw connections on refrigerant circuit,
Adapter -V.A.G 1785/7- and Adapter -V.A.G 1785/8- from VW/
Audi passenger vehicle set adapter chest -VAS 6338/1- can
be used; on vehicles with screw connections at A/C compres‐
sor and at reservoir, two Adapters -V.A.G 1785/8- are re‐
quired.
♦ In VW/Audi passenger vehicle set adapter chest -VAS
6338/1- , there is also a Charge hose -VAS 6338/31- with con‐
nections 5/8 -18 UNF and large inner diameter in short version
(commercially available).
Preparation
– Discharge refrigerant circuit. Refer to
⇒ “2.4.9 Draining Refrigerant Circuit“, page 87 .
– Remove the A/C compressor. Refer to ⇒ Heating, Ventilation
and Air Conditioning; Rep. Gr. 87 ; Removal and Installation
(vehicle-specific repair manual).
On a vehicle with restrictor and reservoir
– Remove restrictor (vehicle-specific) and reconnect lines. Re‐
fer to ⇒ Heating, Ventilation and Air Conditioning; Rep. Gr.
87 ; Removal and Installation (vehicle-specific repair manual).
– Remove reservoir (vehicle-specific) and reconnect the lines
(use adapters and Fill hose -VAS 6338/31- from the Adapter
case for VW/Audi passenger cars -VAS 6338/1- ). Refer to
⇒ “2.1.2 Adapter for Assembling Flushing Circuit“,
page 42 , ⇒ Heating, Ventilation and Air Conditioning; Rep.
Gr. 87 ; Removal and Installation (vehicle-specific repair man‐
ual).
Note
The reservoir could be flushed but because of its large internal
volume it will take too much refrigerant, the reservoir would ice-
up too much when extracting the refrigerant, the refrigerant would
evaporate too slowly and extraction would be extended too much.
On a vehicle with expansion valve and fluid reservoir
– Remove fluid reservoir (vehicle-specific) and reconnect the
lines (use adapters and Fill hose -VAS 6338/31- from the
Adapter case for VW/Audi passenger cars -VAS 6338/1- ).
Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A2 2001 ➤ , A ...
Refrigerant R134a Servicing - Edition 01.2011
1. General Information 33