Removing and installing pulley (without air conditioning system magnetic clutch N25), “Denso” version “1” — AUDI

Removing and installing pulley (without
air conditioning system magnetic clutch
N25
),
“Denso”
version
“1”
Note
Observe notes on renewing pulley
E
Chapter
.
Perform same preliminary work as when removing pulley
Chapter
.
Pulley is made of plastic, is sensitive to impact and should be treated with special care.
If the overload protection device of the drive plate
C
has been triggered, the pulley
E
can rotate together with the outer section of the drive plate
C
without the compressor shaft
B
and the hexagonal bolt
D
attached to the drive plate (inner section of drive plate
C
) rotating simultaneously.
Perform preparations
Chapter
“
Preparations for renewing pulley
”
.
Detaching
Remove cap
A
.
Hold air conditioner compressor drive shaft
B
e.g. with a commercially available hexagon socket wrench (7 mm) and turn drive plate
C
with pulley
E
in direction of
arrow
.
Note
The torque for driving the air conditioner compressor is applied to the compressor shaft via the threaded connection between the drive plate
C
and the compressor shaft. If the drive plate
C
has become so firmly attached to the air conditioner compressor shaft that it can no longer be loosened (the 7 mm hexagon socket wrench
B
can no longer transmit the necessary torque), the compressor must be renewed.
Detach drive plate
C
.
Remove circlip
A
.
Detach pulley
B
.
Attaching
Note
Renew circlip
A
.
Clean flange of air conditioner compressor before fitting pulley
B
.
When fitting circlip
A
, take care not to bend it open more than necessary.
Install pulley
B
.
Ensure that circlip
A
is fitted correctly (bevelled side
C
faces away from air conditioner compressor; flat side faces compressor).
Clean thread of compressor shaft.
Note
Thread of new drive plate has been lubricated at factory with a pre-determined amount of a specific grease.
Before installing drive plate, coat rubber elements
D
slightly with lubricant (e.g. tyre fitting paste or soap solution).
Insert rubber elements
D
in pulley
B
as shown.
Press rubber element of drive plate
C
into pulley
E
until drive plate
C
makes contact with thread of air conditioner compressor shaft
B
.
Secure drive plate
C
to compressor shaft
B
by turning in direction opposite to
arrow
.
Hold air conditioner compressor drive shaft
B
e.g. with a commercially available hexagon socket wrench (7 mm) and turn drive plate
C
with pulley
E
in direction opposite to that of
arrow
(tightening torque: 30 Nm).