Replace the Ultimaker 3 Bowden tubes

The Bowden tubes guide the filament from the feeders to the print head. Over time, the inside and outside of the tubes may have become scratched. This can cause print quality issues, or the tubes are not held securely in place anymore.

It is recommended to check the surface of the Bowden tubes once a year. Replace them when necessary to retain optimal print quality and reliability.

Caution: After unloading the material(s), turn off the printer or ensure it is disabled in the Ultimaker Digital Factory to prevent new print jobs from starting remotely.

Requirements and info

Part(s) 1x 1266 - Bowden tube (old part number)
Note: Now supplied as Bowden pack including collets and clamp clips (part numbers 1696 or 226572).
Tool(s) None required
Time 3 - 5 minutes
Difficulty level 1 - Easy

Tip: The Bowden pack also includes a new set of tube coupling collets and clamp clips. You can replace these at the same time, or keep them for later.


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1. Unload material(s) 2. Remove clamp clips

In the Ultimaker 3 menu, go to Material/PrintCore - Material [X] - Unload. Select the material(s) for the side(s) where you want to replace the Bowden tube. You do not have to remove the spool from the spool holder.


Place the print head in the front-right corner for easier access and remove the clamp clip from around the tube coupling collet. Also remove the clamp clip from the corresponding feeder.
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3. Remove Bowden tube 4. Loosen cable clips

Press down on the tube coupling collet while pulling the Bowden tube out of the print head. Repeat this for the corresponding feeder.


When removing the Bowden tube from extruder 2 (right), loosen the four cable clips from the Bowden tube to remove it completely.



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1. Note the two sides 2. Insert into feeder

Take the new Bowden tube and note the two different sides. The chamfered side should be inserted into the feeder. This allows easier access of the filament into the Bowden tube. The flat side goes into the print head.


Insert the chamfered side of the Bowden tube into the feeder. Keep the collet pressed down and push the Bowden tube all the way in. Secure the tube with the clamp clip.


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3. Insert into print head 4. Place cable clips

Insert the other side of the Bowden tube into the print head. Keep the collet pressed down and push the Bowden tube all the way in. Secure the tube with the clamp clip.


For Bowden tube 2 (right), click the header cable clips from the print head cable onto the Bowden tube. Equally divide the clips over the Bowden tube, starting at ~10 cm above the print head.




5. Reload material(s)


In the Ultimaker 3 menu, go to Material/PrintCore - Material [X] - Load. Insert the material into the feeder and follow the instructions on the display.

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