Audi Q5 2008 - Page 39

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.
Note
♦ Before drilling open, remove the regulating element and drill
open the expansion valve using a suitable drill (drill bit diam‐
eter 6.0 mm).
♦ Several components are to be removed from expansion valve
before drilling open.
♦ Expansion valves are available in various versions and with
different constructions. For version -A-, for example, parts
-B-, -C- and -D- must be removed. Then separate part -E-
(regulating element) from component -D-. Then drill open
expansion valve in area -F- using a suitable drill.
♦ For version -G-, for example parts -H-, -I- and -K- must be
removed and then drill open area -L- using a suitable drill.
– Clean the drilled open expansion valve of residue from the
work (shavings).
– Install parts -B-, -C- and -D- for version -A- or -H- for version
-G-.
Note
On vehicles with two evaporators, disconnect second evaporator
circuit from first evaporator circuit and flush separately. Refer to
⇒ “2.1.2 Adapter for Assembling Flushing Circuit“, page 42
and⇒ Heating, Ventilation and Air Conditioning; Rep. Gr. 87 ;
Removal and Installation (vehicle-specific repair manual).
Flushing
– Check refrigerant quantity in the A/C service station, there
must be at least 7 kg of refrigerant R134a.
Note
If necessary, switch on heating installed in service station for the
refrigerant container before first flushing (to increase the pressure
in the refrigerant container) and switch off before first extraction
during flushing.
– Drain the old oil container of the A/C service station
– Connect the supply hose (high pressure side) of A/C service
station to the low pressure line leading to the A/C compressor
(line with larger diameter) using an adapter. Refer to
⇒ “2.1.2 Adapter for Assembling Flushing Circuit“,
page 42 .
– Connect return hose (low pressure- or intake side) of A/C
service station to output of refrigerant circuit flushing device.
– Connect the input on the refrigerant circuit flushing device to
the high pressure line leading to the A/C compressor (line with
smaller diameter) using an adapter. Refer to
⇒ “2.1.2 Adapter for Assembling Flushing Circuit“,
page 42 .
Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A2 2001 ➤ , A ...
Refrigerant R134a Servicing - Edition 01.2011
1. General Information 35