Audi TT - Belt Pulleys

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5.6 Belt Pulleys
⇒ “5.6.1 Denso A/C Compressor (Version 1)“, page 117
⇒ “5.6.2 Denso A/C Compressor (Version 2)“, page 119
⇒ “5.6.3 Sanden A/C Compressor“, page 121
5.6.1 Denso A/C Compressor (Version 1)
Note
♦ Observe notes on replacing belt pulley. Refer to
⇒ “2.4 Belt Pulley, Denso A/C Compressor, Version 1“,
page 52 .
♦ Perform preliminary work as for removing belt pulley. Refer to
⇒ “1.1 A/C Compressor Belt Pulley, Replacement“, page 24 .
♦ Belt pulley is made of plastic and is sensitive to impact, there‐
fore handle it with special care.
♦ If overload safeguard of drive plate -C- has triggered, drive
plate can be pried off from belt pulley -D- after removing circlip
-A-
♦ To optimize noise reduction, a circlip -A- with a rubber disc
vulcanized on it is installed. Refer to
⇒ “2.4 Belt Pulley, Denso A/C Compressor, Version 1“,
page 52 and Electronic Parts Catalog. This rubber disc can
reduce a clapping (castanet-like) noise which occurs espe‐
cially at belt pulley in vehicles with Diesel engine in A/C system
operating mode “Econ“ (“AC off“) (the noise is almost inaudible
with A/C system operating at full output).
Removal
– Using a small screwdriver or needle-nose pliers, carefully re‐
move circlip -A- (with rubber disc vulcanized on to it). Refer to
⇒ “2.4 Belt Pulley, Denso A/C Compressor, Version 1“,
page 52 ; take extreme care not to damage belt pulley when
doing this.
– Hold the A/C compressor input shaft -B- securely with a stand‐
ard socket wrench and turn drive plate -C- with pulley -D- in
direction of arrow -E- (tightening torque 35 Nm).
– Remove drive plate -C-.
– Remove circlip -A-.
– Remove pulley -B-.
Installation
Audi TT 2007 ➤
Heating, Ventilation and Air Conditioning - Edition 01.2011
5. Removal and Installation 117