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

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

How to replace the Hotend assembly (XL single-tool)
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Last updated 24 days ago
How to replace the Hotend assembly (XL single-tool)
 Difficulty
Easy
 Steps
11
 Available languages
CSPLDEESITFR
Introduction
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.
Tools necessary for this chapter
Tools necessary for this chapter
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
Preparing the printer
Preparing the printer
Preparing the printer
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.
Protecting the heatbed
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.
Disconnecting the hotend
Disconnecting the hotend
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.
Removing the hotend
Removing the hotend
Removing the hotend
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.
Inserting the hotend
Inserting the hotend
Inserting the hotend
Inserting the hotend
Push the hotend cable behind the heatsink fan up to the electronics.
Locate the hole in the heatsink from the bottom of the extruder and insert the hotend nub into the heatsink.
Push the hotend all assembly the way in.
Rotate the heaterblock as in the picture. There must be approximately 35° - 40° angle to avoid damaging the hotend cables.
Maintain the position and using the TX 8 Torx key carefully tighten the grub screw to secure the hotend.
Do not use extra force while tightening, it may damage the hotend tube.
Connecting the hotend
Connecting the hotend
Connecting the hotend
Connecting the hotend
Connect the hotend heater to the upper slot on the electronics board.
Connect the hotend thermistor to the lower slot on the electronics board.
Remove the cardboard box from the heatbed.
Close the dwarf-cover-door.
Checking the temperature
Checking the temperature
Checking the temperature
Checking the temperature
Close the dwarf-cover-door.
To check if everything is working, go to Preheat -> PLA and on the main screen check if the hotend temperature is increasing.
WARNING: The hotend and heatbed are very HOT. Do not touch these parts!!!
Snap the x-carriage-cover back onto the X-carriage. You must feel a slight "click" to ensure the cover fits on the part.
That's it
That's it
Easy, right! Good job. You just successfully replaced the Hotend on your Original Prusa XL.
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