The manual section contains the procedure for replacing the extruder with the emergency one.
Today we will see how to disassemble an extruder to replace it.

Let's make sure you have a Phillips screwdriver handy, that the 3D printer is turned off and no material wire inserted into the extruder.

To the left of the extruder there is a fan, looking at the anchor point of the fan you can see 4 year, let's proceed with the unscrewing of the 4 screws that block the dissipating body of the extruder. Once unscrewed, you can remove the block which will remain anchored to the fan.
At this point, proceed with pulling the extruder down and it will come out of its seat remaining connected only to its cable.
At this point, you can disconnect the extruder cable from the upper end of the arm.
Once this is done you will have disassembled the extruder, and you can perform the same maneuver in reverse to reassemble the new extruder.
A short image gallery will follow as soon as possible for the less experienced.