Jak odstranit chladicí ventilátor?

Thank you for the advice.
I will buy a puller and try it.

Use:
1. Puller

2. Puller, time 0:45
3. www.jawarmaniak.4fan.cz/CZ/katalogy/CZ_502_katalog_ND/06.jpg , remove duster number 8, get off small and then bigger bearing with hammer through the stick

Thank you.
I could remove the cooling fan, but do you know how to replace this bearing?

Yes

Do you mean circular slot is this area?

Remove the seger ring, and
1. At the back of the fan is a circular slot. Put them in two screwdrivers and pry
or
2. One person holds two opposing blades with his hands. In the air. The other person strikes the shaft with a pointed log
3. You can try warming with a soft flame

There is a risk of damage to the aluminum with the puller