How to replace the Hotend assembly (XL single-tool)

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Last updated 8 months ago

Difficulty

Easy

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Step 1 Introduction

⬢This guide will take you through the replacement of the Hotend assembly on the Original Prusa XL (single-tool).

⬢To replace the Hotend assembly on the Original Prusa XL (multi-tool) go to How to replace the Prusa Nozzle (XL multi-tool)

The following instructions are compatible with all Prusa Nozzle diameters.

⬢All necessary parts are available in our eshop prusa3d.com.

Note that you have to be logged in to have access to the spare parts section.

Step 2 Tools necessary for this chapter

⬢For this chapter, please prepare:

⬢TX 8 Torx key

⬢A cardboard box for use as a heatbed protection during the assembly. Hint: use the Prusament box.

⬢Small brass brush for cleaning the nozzle

Step 3 Preparing the printer

⬢Manually move the X-axis assembly all the way to the front side of the printer.

⬢Move the extruder approximately to the center of the X-axis.

⬢If you have loaded the filament, unload it from the hotend. On the screen, navigate to Filament -> Unload Filament.

WARNING: The hotend and heatbed are very HOT. Do not touch these parts!!!

⬢Remove the filament from the hotend. It is not necessary to completely remove it from the printer. Just a few centimeters (inches) above the extruder.

⬢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.

Step 4 Protecting the heatbed

⬢Before you proceed, it is recommended to protect the heatbed.

⬢Make sure the heatbed is cooled down to ambient temperature. Place the empty cardboard box approximately to the front center part of the heatbed.

Step 5 Disconnecting the hotend

⬢Open the dwarf-cover-door to access the electronics board.

⬢Disconnect the hotend heater cable.

Each connector has a safety latch. It is necessary to press the latch before disconnecting. Otherwise, the connector may get damaged.

⬢Disconnect the hotend thermistor cable.

⬢Leave both cables free for now.

Step 6 Removing the hotend

⬢Remove the x-carriage-cover from the X-carriage.

⬢Hold the hotend with your right hand.

⬢Using your left hand, insert the Torx TX8 key all the way through the X-carriage until it reaches the grub screw in the extruder. Loosen the screw. Do not remove the screw, a few turns are enough!

⬢Carefully pull the hotend assembly out of the extruder.

⬢At the same time push the hotend cables behind the fan out of the extruder.