WARNING: The hotend and heatbed are very HOT. Do not touch these parts!!!
⬢For the following steps, it is necessary to have the heaterblock and the hotend clean from the remains of the filament. Otherwise, it can be difficult to release the nozzle.
If you have a Prusa hotend sock on the hotend, remove it.
⬢On the printer screen, go to Control -> Temperature -> Nozzle Temperature and using the knob set 250°C.
⬢Wait at least 5 minutes. The remains of the filament must be warmed up slightly so that they can be removed more easily.
⬢Using the brass brush, carefully clean the heaterblock and the hotend from the filament residue. Avoid contact of the brush with the hotend cables, as this could cause a short circuit.
⬢When the heaterblock and the hotend are perfectly clean, cool down the printer. On the screen, navigate to Preheat -> Cooldown.
Wait until the hot parts are cooled down to ambient temperature. It takes approximately 10 minutes.
⬢Turn the printer OFF and unplug the power cable from the PSU (Power Supply Unit).
Make sure the printer parts - print head and heatbed are cooled down at room temperature.
Turn the printer off and unplug it from the socket!
Before proceeding any further, it is recommended to protect the heatbed first!
⬢Take off the flexible steel sheet.
⬢Use any cloth or piece of fabric, which is thick enough and cover the heatbed. This will ensure you won't damage (scratch) the surface during the disassembly.
In the following steps, we will need to heat up the nozzle. Avoid touching the HOT parts on the hotend.
Remove the cloth from the heatbed!
⬢Plug the power cord to the printer and turn it ON.
⬢Now, you will need to set the nozzle temperature to 250°C. On the printer screen, navigate to Control -> Temperature -> Nozzle Temperature and using the knob set 250°C.
WARNING: From now, the hotend is very HOT. Do not touch it!!!
⬢Grasp the heaterblock with the wrench 13-16. Avoid pulling on the hotend!
⬢Tighten the nozzle using the universal wrench. Do not overtighten it, you can damage the thread. Use the sufficient force. The prescribed tightening torque is 1.5 Nm.
NOTE: Avoid bending the hotend assembly while tightening! After that, there will be a gap of approximately 1 mm between the nozzle and the heater block.
CAUTION!!! COOLDOWN THE PRINTER before proceeding with this step. Wait until the hot parts are cooled down to ambient temperature. It takes approximately 10 minutes.
⬢Push the hotend assembly all the way into the heatsink. There should be approximately a 2 mm gap between the heatsink and the brass part of the nozzle.
⬢Orient the hotend assembly so that the HOT symbol on the heaterblock faces forward.
⬢While pushing the hotend assembly in, firmly tighten the lower thumb screw and the upper thumb screw. Avoid pinching any cable between the screws and the heatsink!
⬢Locate the cable channel behind the thumb screws. Guide the hotend thermistor cable through the channel first. Then insert the hotend heater cable.
⬢Guide the heatsink fan cable as you can see. Push it in the cable channel.
⬢Arrange all the cables according to the picture. All cables must be squeezed as close to the extruder body as possible so as not to interfere with the cover in the next step.
⬢Congratulations! You just successfully replaced the NextruderV6 Nozzle Adapter on your Original Prusa MK4.
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