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Loosen the wire (A) between the spring and the pulley.
Note!
The wire can be sharp so it is recommended to use gloves.
Loosen the belt around the pulley (B).
Demount the motor module. Carefully lift out the motor module and put it down with the fan motor cover downwards.
In order to loosen the belt, first loosen the four screws a bit.
Service Manual
fig.7220C
fig.7216A
fig.490377800