Audi TT - Page 127

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1 - Hex Head Nut
Note
❑ To loosen and tighten
hex nut, hold belt pulley
firmly in place using a
standard band wrench
(with webbing).
❑ Clean threads of hex nut
and threads of A/C com‐
pressor shaft of old
thread locking com‐
pound before screwing
on.
❑ Install the hex nut with
thread locking com‐
pound (e.g. with D 000
600 A2). Refer to Elec‐
tronic Parts Catalog.
❑ Nut tightening specifica‐
tion: 25 Nm
2 - Screw
❑ To loosen and tighten
bolts, hold belt pulley
firmly in place using a
standard band wrench
(with webbing).
❑ Tightening specification
12 Nm
❑ Clean old bolt locking
compound from thread
of bolts and threads of
belt pulley before screw‐
ing on.
❑ Install the bolts with
thread locking com‐
pound (for example, D 000 600 A2). Refer to the Electronic Parts Catalog.
3 - Drive Plate
❑ The overload protection (securing spring elements), takes over when the torque is excessive (for exam‐
ple, if the A/C compressor runs with resistance) and the belt pulley runs freely without driving the A/C
compressor.
❑ Drive plate spring elements damp vibrations and noise.
4 - Circlip
❑ Replace
❑ Install on proper side, beveled insertion edge -A- faces away from A/C compressor (install flat side facing
the A/C compressor).
❑ When installing circlip, note that it cannot be bent open more than is necessary for installation.
5 - Belt Pulley
❑ Clean A/C compressor flange before sliding on pulley.
❑ With rubber elements -B- and threaded plates -C- for decoupling belt pulley from A/C compressor input
shaft (rubber elements damp vibrations and noise).
Note
6 - A/C Compressor
❑ Different versions may be installed, depending on engine version and country version of vehicle. Refer
to Electronic Parts Catalog (ETKA).
Audi TT 2007 ➤
Heating, Ventilation and Air Conditioning - Edition 01.2011
5. Removal and Installation 123