Audi Q7 2007 Repair Manual page 251

Rubber elements are installed
♦
between belt pulley/drive unit
and compressor driveshaft, vi‐
brations which may occur during
compressor operation may be
dissipated via these rubber ele‐
ments (damper function at tor‐
que fluctuations).
There are different belt pulleys
♦
depending on the type of A/C
compressor (6-cylinder, 8-cylin‐
der TDI or 12-cylinder TDI en‐
gine). Refer to
⇒ "4 Compressor Pulley",
page 34
4 - Oil Drain Plug
❑ Denso compressors have sealing ring installed, always replace
❑ Tightening specification: 30 Nm
❑ May only be removed to drain refrigerant oil with the compressor removed (turn compressor via belt
pulley/drive unit to speed up refrigerant oil drainage). Refer to ⇒ A/C System with Refrigerant R134a;
Rep. Gr. 87 ; Refrigerant Circuit Components, Replacing (A/C System with Refrigerant R134a; Refrig‐
erant Circuit Components, Replacing).
5 - High Pressure Relief Valve
❑ Do not remove
❑ Tightening specification: 10 Nm
6 - Connection without Valve
❑ With the refrigerant circuit empty, use an adapter from the Socket for A/C Valves - T10364- to remove
and install a valve insert.
WARNING
The valve insert may be
removed only when the
refrigerant circuit is emp‐
ty.
7 - Refrigerant Temperature Sensor - G454-
WARNING
♦ The connection on which
the Refrigerant Temper‐
ature Sensor - G454- is
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
installed does not pos‐
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
sess a valve, therefore
with respect to the correctness of information in this document. Copyright by AUDI AG.
the Refrigerant Temper‐
ature Sensor - G454-
may only be removed
with a discharged refrig‐
erant circuit.
❑ Removing and Installing. Refer to
⇒ "15.5 Refrigerant Temperature Sensor G454 , Removing and Installing", page 255
❑ Function and signal utilization. Refer to
⇒ "3.5 Refrigerant Temperature Sensor G454 Function and Signal Utilization", page 23
❑ Not installed on all vehicles (depending on engine and on version). Refer to Wiring diagrams, Trouble‐
shooting & Component locations.
Heating, Ventilation and Air Conditioning - Edition 04.2013
.
Audi Q7 2007 ➤
.
.
15. Refrigerant Circuit, Servicing
245