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Replacing pulley with magnetic clutch N25 > < Detaching pulley from air conditioner compressor/re-attaching

A4 Mk3

Detaching/attaching pulley
Detaching/attaching pulley
Detaching
   
–  Remove the sealing cap -A-.
–  Hold the air conditioner compressor drive shaft -B- with a commercially available hexagon socket wrench (7 mm) for example and turn the drive plate -C- with the pulley -E- in arrow direction -arrow-.
  Note
The torque for driving the air conditioner compressor is applied to the compressor shaft by way of the bolted joint of the drive plate -C-. If in the course of air conditioner compressor operation the drive plate -C- has become so firmly attached to the compressor shaft that it can no longer be unfastened (the 7 mm hexagon socket wrench -B- can no longer transmit the necessary torque), the air conditioner compressor must be replaced.
–  Detach the drive plate -C-.
  A87-10429
–  Remove the circlip -A-.
–  Detach the pulley -B-.
Attaching
  Note
Replace the circlip -A-.
Clean the flange of the air conditioner compressor before fitting the pulley -B-.
On fitting the circlip -A-, take care not to bend it open more than necessary for installation.
–  Fit the pulley -B-.
–  Ensure correct insertion of the circlip -A-. The bevelled side -C- faces away from the air conditioner compressor (flat side faces compressor).
–  Clean the thread of the compressor shaft.
  Note
The thread of the new drive plate is pre-greased at the factory with a pre-determined quantity of a specific grease.
–  For fitting the drive plate, coat the rubber elements -D- slightly with tyre assembly paste or soap solution for example to provide lubrication.
–  Insert the rubber elements -D- in the pulley -B- as shown.
  A87-10430
–  Press the rubber element of the drive plate -C- into the pulley -E- until the drive plate -C- makes contact with the thread of the shaft of the air conditioner compressor -B-.
–  By turning in the direction opposite to the arrow -arrow-, screw the drive plate -C- onto the compressor shaft -B-.
–  Hold the air conditioner compressor drive shaft -B- with a commercially available hexagon socket wrench (7 mm) for example and secure the drive plate -C- with the pulley -E- by turning in the direction opposite to the arrow -arrow- (tightening torque 30 Nm).
  A87-10429

Replacing pulley with magnetic clutch N25 > < Detaching pulley from air conditioner compressor/re-attaching