Tip: These steps are applicable to Ultimaker 2 GO, Ultimaker 2, and Ultimaker 2 Extended.
1. Remove your 3D printing filament
- Go to MATERIAL > CHANGE to remove the filament. When the machine prompts you to insert new filament, select CANCEL.
- Manually move the extruder to the front of the Ultimaker 2 to assist you in the next step.
2. Detach the Bowden tube
- Remove the (blue or red) Bowden tube clip.
- Press the white Bowden tube connector and pull out the Bowden tube.
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3. Remove the extruder from the Ultimaker
- Slightly tilt the sliders on the left and right sides of the X-axis to loosen the X-axis.
- Slightly tilt the sliders at the front and back of the Y-axis to loosen the Y-axis.
- Remove the extruder and both the X and Y axes from the Ultimaker.
4. Loosen the print head casing
- Wrap some tape (any tape will do) around the extruder to ensure it doesn't fall apart.
- Loosen the 4 screws at the top. You will then see the extruder split into 2 parts: the casing and the hot end assembly.
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5. Disassemble the hot end
- Remove the 2 screws on both sides of the hot end to detach the fan bracket.
- Loosen the two screws on the top aluminum plate, then the spring and PTFE coupler can be removed.
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- Insert a hex wrench into the hole of the hot end insulator and turn counter-clockwise to loosen the nozzle from the hot end insulator (the metal part shown in the image below). This way, the nozzle can be removed.
- Next, loosen the retaining screw at the top of the heating block and carefully pull out the PT100 B temperature sensor wire and the heating wire.
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*Important: Do not pull the PT100 B temperature sensor wire too hard, as it can be damaged. If it's difficult to pull out, you can slightly twist the cable and use some sewing machine oil or WD40 to assist.
Any components within the entire print head assembly that need to be replaced can be done following this procedure, including the PTFE coupler, PT100 B temperature sensor wire, nozzle, hot end, fan, and so on.
Article source:https://ultimaker.com/en/support/view/252-disassembly
Translated by: 3DMART S.D.M.