Audi Q7 2007 Repair Manual page 20

Audi Q7 2007 ➤
Heating, Ventilation and Air Conditioning - Edition 04.2013
❑ Depending on the compressor type and the refrigerant circuit design (one or two evaporators), different
refrigerant and refrigerant oil capacities are used for the refrigerant circuit. Refer to ⇒ Refrigerant R134a
Servicing; Rep. Gr. 87 ; A/C System General Information (Refrigerant R134a, Servicing; Refrigerant
R134a Capacities, Refrigerant Oil and Approved Refrigerant Oil).
3 - Compressor Belt Pulley/Drive Unit
❑ There are different versions (depending on the engine). Refer to the Parts Catalog.
❑ For replacing the A/C compressor belt pulley (vehicles with a 6-cylinder engine, 8-cylinder TDI engine
or 12-cylinder TDI engine)
❑ For removing and installing the ribbed belt (vehicles with a 6-cylinder engine, 8-cylinder TDI engine or
12-Cylinder TDI engine)
Side; Ribbed Belt, Removing and Installing .
❑ For the correct ribbed belt allocation (for vehicles with a 6-cylinder engine, 8-cylinder TDI engine or 12-
cylinder TDI engine), refer to the Parts Catalog.
❑ For removing and installing the A/C Compressor drive unit (vehicles with an 8-cylinder FSI engine), refer
to
⇒ "16.5 Compressor Drive Unit, Checking and Replacing (Vehicles with 8-Cylinder FSI Engine)",
page 290 (for removing the A/C compressor, refer to
⇒ "16.4 Compressor, Removing and Installing (Vehicles with 8-Cylinder FSI Engine)", page 283
Note
An overload safeguard is instal‐
♦
led between the belt pulley/drive
unit and driveshaft, this protects
the compressor belt/engine in
the event that the compressor is
seized or does not move freely.
If compressor is runs with resist‐
♦
ance, overload safeguard inter‐
rupts power transmission to
compressor.
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).
Depending on compressor type,
♦
different belt pulleys are installed
on compressor. Refer to
⇒ "4 Compressor Pulley",
page 34 .
14
Rep. Gr.87 - Air Conditioning
1)
, refer to ⇒ "4 Compressor Pulley", page 34
1)
, refer to the ⇒ Engine Mechanical; Rep. Gr. 19 ; Cylinder Block, Belt Pulley
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.
).